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Index: stable/10/sys/netinet/sctp_input.c
===================================================================
--- stable/10/sys/netinet/sctp_input.c (revision 294215)
+++ stable/10/sys/netinet/sctp_input.c (revision 294216)
@@ -1,6234 +1,6205 @@
/*-
* Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <netinet/sctp_os.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_sysctl.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctp_header.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_input.h>
#include <netinet/sctp_auth.h>
#include <netinet/sctp_indata.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_bsd_addr.h>
#include <netinet/sctp_timer.h>
#include <netinet/sctp_crc32.h>
#if defined(INET) || defined(INET6)
#include <netinet/udp.h>
#endif
#include <sys/smp.h>
static void
sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
{
struct sctp_nets *net;
/*
* This now not only stops all cookie timers it also stops any INIT
* timers as well. This will make sure that the timers are stopped
* in all collision cases.
*/
SCTP_TCB_LOCK_ASSERT(stcb);
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
stcb->sctp_ep,
stcb,
net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
} else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
stcb->sctp_ep,
stcb,
net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
}
}
}
/* INIT handler */
static void
sctp_handle_init(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
struct sctp_tcb *stcb, int *abort_no_unlock,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id, uint16_t port)
{
struct sctp_init *init;
struct mbuf *op_err;
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
(void *)stcb);
if (stcb == NULL) {
SCTP_INP_RLOCK(inp);
}
/* validate length */
if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
if (stcb)
*abort_no_unlock = 1;
goto outnow;
}
/* validate parameters */
init = &cp->init;
if (init->initiate_tag == 0) {
/* protocol error... send abort */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
if (stcb)
*abort_no_unlock = 1;
goto outnow;
}
if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
/* invalid parameter... send abort */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
if (stcb)
*abort_no_unlock = 1;
goto outnow;
}
if (init->num_inbound_streams == 0) {
/* protocol error... send abort */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
if (stcb)
*abort_no_unlock = 1;
goto outnow;
}
if (init->num_outbound_streams == 0) {
/* protocol error... send abort */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
if (stcb)
*abort_no_unlock = 1;
goto outnow;
}
if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
offset + ntohs(cp->ch.chunk_length))) {
/* auth parameter(s) error... send abort */
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
"Problem with AUTH parameters");
sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
if (stcb)
*abort_no_unlock = 1;
goto outnow;
}
/*
* We are only accepting if we have a socket with positive
* so_qlimit.
*/
if ((stcb == NULL) &&
((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
(inp->sctp_socket == NULL) ||
(inp->sctp_socket->so_qlimit == 0))) {
/*
* FIX ME ?? What about TCP model and we have a
* match/restart case? Actually no fix is needed. the lookup
* will always find the existing assoc so stcb would not be
* NULL. It may be questionable to do this since we COULD
* just send back the INIT-ACK and hope that the app did
* accept()'s by the time the COOKIE was sent. But there is
* a price to pay for COOKIE generation and I don't want to
* pay it on the chance that the app will actually do some
* accepts(). The App just looses and should NOT be in this
* state :-)
*/
if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
"No listener");
sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
}
goto outnow;
}
if ((stcb != NULL) &&
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
sctp_send_shutdown_ack(stcb, NULL);
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
} else {
SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, src, dst,
sh, cp,
mflowtype, mflowid,
vrf_id, port,
((stcb == NULL) ? SCTP_HOLDS_LOCK : SCTP_NOT_LOCKED));
}
outnow:
if (stcb == NULL) {
SCTP_INP_RUNLOCK(inp);
}
}
/*
* process peer "INIT/INIT-ACK" chunk returns value < 0 on error
*/
int
sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
int unsent_data = 0;
unsigned int i;
struct sctp_stream_queue_pending *sp;
struct sctp_association *asoc;
/*
* This function returns the number of streams that have true unsent
* data on them. Note that as it looks through it will clean up any
* places that have old data that has been sent but left at top of
* stream queue.
*/
asoc = &stcb->asoc;
SCTP_TCB_SEND_LOCK(stcb);
if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
/* Check to see if some data queued */
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
/* sa_ignore FREED_MEMORY */
sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
if (sp == NULL) {
continue;
}
if ((sp->msg_is_complete) &&
(sp->length == 0) &&
(sp->sender_all_done)) {
/*
* We are doing differed cleanup. Last time
* through when we took all the data the
* sender_all_done was not set.
*/
if (sp->put_last_out == 0) {
SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
sp->sender_all_done,
sp->length,
sp->msg_is_complete,
sp->put_last_out);
}
atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
if (sp->net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
}
sctp_free_a_strmoq(stcb, sp, so_locked);
} else {
unsent_data++;
break;
}
}
}
SCTP_TCB_SEND_UNLOCK(stcb);
return (unsent_data);
}
static int
sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
{
struct sctp_init *init;
struct sctp_association *asoc;
struct sctp_nets *lnet;
unsigned int i;
init = &cp->init;
asoc = &stcb->asoc;
/* save off parameters */
asoc->peer_vtag = ntohl(init->initiate_tag);
asoc->peers_rwnd = ntohl(init->a_rwnd);
/* init tsn's */
asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
if (!TAILQ_EMPTY(&asoc->nets)) {
/* update any ssthresh's that may have a default */
TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
lnet->ssthresh = asoc->peers_rwnd;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
}
}
}
SCTP_TCB_SEND_LOCK(stcb);
if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
unsigned int newcnt;
struct sctp_stream_out *outs;
struct sctp_stream_queue_pending *sp, *nsp;
struct sctp_tmit_chunk *chk, *nchk;
/* abandon the upper streams */
newcnt = ntohs(init->num_inbound_streams);
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
if (chk->rec.data.stream_number >= newcnt) {
TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
asoc->send_queue_cnt--;
if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
#ifdef INVARIANTS
} else {
panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
#endif
}
if (chk->data != NULL) {
sctp_free_bufspace(stcb, asoc, chk, 1);
sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
0, chk, SCTP_SO_NOT_LOCKED);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
}
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
/* sa_ignore FREED_MEMORY */
}
}
if (asoc->strmout) {
for (i = newcnt; i < asoc->pre_open_streams; i++) {
outs = &asoc->strmout[i];
TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
TAILQ_REMOVE(&outs->outqueue, sp, next);
asoc->stream_queue_cnt--;
sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
stcb, 0, sp, SCTP_SO_NOT_LOCKED);
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
}
if (sp->net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
/* Free the chunk */
sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
/* sa_ignore FREED_MEMORY */
}
outs->state = SCTP_STREAM_CLOSED;
}
}
/* cut back the count */
asoc->pre_open_streams = newcnt;
}
SCTP_TCB_SEND_UNLOCK(stcb);
asoc->streamoutcnt = asoc->pre_open_streams;
for (i = 0; i < asoc->streamoutcnt; i++) {
asoc->strmout[i].state = SCTP_STREAM_OPEN;
}
/* EY - nr_sack: initialize highest tsn in nr_mapping_array */
asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
}
/* This is the next one we expect */
asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
asoc->advanced_peer_ack_point = asoc->last_acked_seq;
/* open the requested streams */
if (asoc->strmin != NULL) {
/* Free the old ones */
struct sctp_queued_to_read *ctl, *nctl;
for (i = 0; i < asoc->streamincnt; i++) {
TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
sctp_free_remote_addr(ctl->whoFrom);
ctl->whoFrom = NULL;
sctp_m_freem(ctl->data);
ctl->data = NULL;
sctp_free_a_readq(stcb, ctl);
}
}
SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
}
if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
asoc->streamincnt = ntohs(init->num_outbound_streams);
} else {
asoc->streamincnt = asoc->max_inbound_streams;
}
SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
sizeof(struct sctp_stream_in), SCTP_M_STRMI);
if (asoc->strmin == NULL) {
/* we didn't get memory for the streams! */
SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
return (-1);
}
for (i = 0; i < asoc->streamincnt; i++) {
asoc->strmin[i].stream_no = i;
asoc->strmin[i].last_sequence_delivered = 0xffff;
TAILQ_INIT(&asoc->strmin[i].inqueue);
asoc->strmin[i].delivery_started = 0;
}
/*
* load_address_from_init will put the addresses into the
* association when the COOKIE is processed or the INIT-ACK is
* processed. Both types of COOKIE's existing and new call this
* routine. It will remove addresses that are no longer in the
* association (for the restarting case where addresses are
* removed). Up front when the INIT arrives we will discard it if it
* is a restart and new addresses have been added.
*/
/* sa_ignore MEMLEAK */
return (0);
}
/*
* INIT-ACK message processing/consumption returns value < 0 on error
*/
static int
sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
struct sctp_nets *net, int *abort_no_unlock,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id)
{
struct sctp_association *asoc;
struct mbuf *op_err;
int retval, abort_flag;
uint32_t initack_limit;
int nat_friendly = 0;
/* First verify that we have no illegal param's */
abort_flag = 0;
op_err = sctp_arethere_unrecognized_parameters(m,
(offset + sizeof(struct sctp_init_chunk)),
&abort_flag, (struct sctp_chunkhdr *)cp, &nat_friendly);
if (abort_flag) {
/* Send an abort and notify peer */
sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
*abort_no_unlock = 1;
return (-1);
}
asoc = &stcb->asoc;
asoc->peer_supports_nat = (uint8_t) nat_friendly;
/* process the peer's parameters in the INIT-ACK */
retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
if (retval < 0) {
return (retval);
}
initack_limit = offset + ntohs(cp->ch.chunk_length);
/* load all addresses */
if ((retval = sctp_load_addresses_from_init(stcb, m,
(offset + sizeof(struct sctp_init_chunk)), initack_limit,
src, dst, NULL))) {
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
"Problem with address parameters");
SCTPDBG(SCTP_DEBUG_INPUT1,
"Load addresses from INIT causes an abort %d\n",
retval);
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, net->port);
*abort_no_unlock = 1;
return (-1);
}
/* if the peer doesn't support asconf, flush the asconf queue */
if (asoc->asconf_supported == 0) {
struct sctp_asconf_addr *param, *nparam;
TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
TAILQ_REMOVE(&asoc->asconf_queue, param, next);
SCTP_FREE(param, SCTP_M_ASC_ADDR);
}
}
stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
stcb->asoc.local_hmacs);
if (op_err) {
sctp_queue_op_err(stcb, op_err);
/* queuing will steal away the mbuf chain to the out queue */
op_err = NULL;
}
/* extract the cookie and queue it to "echo" it back... */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
net->error_count = 0;
/*
* Cancel the INIT timer, We do this first before queueing the
* cookie. We always cancel at the primary to assue that we are
* canceling the timer started by the INIT which always goes to the
* primary.
*/
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
/* calculate the RTO */
net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered, sctp_align_safe_nocopy,
SCTP_RTT_FROM_NON_DATA);
retval = sctp_send_cookie_echo(m, offset, stcb, net);
if (retval < 0) {
/*
* No cookie, we probably should send a op error. But in any
* case if there is no cookie in the INIT-ACK, we can
* abandon the peer, its broke.
*/
if (retval == -3) {
uint16_t len;
len = (uint16_t) (sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
/* We abort with an error of missing mandatory param */
op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
if (op_err != NULL) {
struct sctp_error_missing_param *cause;
SCTP_BUF_LEN(op_err) = len;
cause = mtod(op_err, struct sctp_error_missing_param *);
/* Subtract the reserved param */
cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
cause->cause.length = htons(len);
cause->num_missing_params = htonl(1);
cause->type[0] = htons(SCTP_STATE_COOKIE);
}
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, net->port);
*abort_no_unlock = 1;
}
return (retval);
}
return (0);
}
static void
sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
struct sctp_tcb *stcb, struct sctp_nets *net)
{
union sctp_sockstore store;
struct sctp_nets *r_net, *f_net;
struct timeval tv;
int req_prim = 0;
uint16_t old_error_counter;
if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
/* Invalid length */
return;
}
memset(&store, 0, sizeof(store));
switch (cp->heartbeat.hb_info.addr_family) {
#ifdef INET
case AF_INET:
if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
store.sin.sin_port = stcb->rport;
memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
sizeof(store.sin.sin_addr));
} else {
return;
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
store.sin6.sin6_port = stcb->rport;
memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
} else {
return;
}
break;
#endif
default:
return;
}
r_net = sctp_findnet(stcb, &store.sa);
if (r_net == NULL) {
SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
return;
}
if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
(r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
(r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
/*
* If the its a HB and it's random value is correct when can
* confirm the destination.
*/
r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
stcb->asoc.primary_destination = r_net;
r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
f_net = TAILQ_FIRST(&stcb->asoc.nets);
if (f_net != r_net) {
/*
* first one on the list is NOT the primary
* sctp_cmpaddr() is much more efficent if
* the primary is the first on the list,
* make it so.
*/
TAILQ_REMOVE(&stcb->asoc.nets, r_net, sctp_next);
TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
}
req_prim = 1;
}
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
}
old_error_counter = r_net->error_count;
r_net->error_count = 0;
r_net->hb_responded = 1;
tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
/* Now lets do a RTO with this */
r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv, sctp_align_safe_nocopy,
SCTP_RTT_FROM_NON_DATA);
if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
r_net->dest_state |= SCTP_ADDR_REACHABLE;
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
0, (void *)r_net, SCTP_SO_NOT_LOCKED);
}
if (r_net->dest_state & SCTP_ADDR_PF) {
r_net->dest_state &= ~SCTP_ADDR_PF;
stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
}
if (old_error_counter > 0) {
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
}
if (r_net == stcb->asoc.primary_destination) {
if (stcb->asoc.alternate) {
/* release the alternate, primary is good */
sctp_free_remote_addr(stcb->asoc.alternate);
stcb->asoc.alternate = NULL;
}
}
/* Mobility adaptation */
if (req_prim) {
if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
SCTP_MOBILITY_BASE) ||
sctp_is_mobility_feature_on(stcb->sctp_ep,
SCTP_MOBILITY_FASTHANDOFF)) &&
sctp_is_mobility_feature_on(stcb->sctp_ep,
SCTP_MOBILITY_PRIM_DELETED)) {
sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
stcb->sctp_ep, stcb, NULL,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
if (sctp_is_mobility_feature_on(stcb->sctp_ep,
SCTP_MOBILITY_FASTHANDOFF)) {
sctp_assoc_immediate_retrans(stcb,
stcb->asoc.primary_destination);
}
if (sctp_is_mobility_feature_on(stcb->sctp_ep,
SCTP_MOBILITY_BASE)) {
sctp_move_chunks_from_net(stcb,
stcb->asoc.deleted_primary);
}
sctp_delete_prim_timer(stcb->sctp_ep, stcb,
stcb->asoc.deleted_primary);
}
}
}
static int
sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
{
/*
* return 0 means we want you to proceed with the abort non-zero
* means no abort processing
*/
struct sctpasochead *head;
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
/* generate a new vtag and send init */
LIST_REMOVE(stcb, sctp_asocs);
stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
/*
* put it in the bucket in the vtag hash of assoc's for the
* system
*/
LIST_INSERT_HEAD(head, stcb, sctp_asocs);
sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
return (1);
}
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
/*
* treat like a case where the cookie expired i.e.: - dump
* current cookie. - generate a new vtag. - resend init.
*/
/* generate a new vtag and send init */
LIST_REMOVE(stcb, sctp_asocs);
stcb->asoc.state &= ~SCTP_STATE_COOKIE_ECHOED;
stcb->asoc.state |= SCTP_STATE_COOKIE_WAIT;
sctp_stop_all_cookie_timers(stcb);
sctp_toss_old_cookies(stcb, &stcb->asoc);
stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
/*
* put it in the bucket in the vtag hash of assoc's for the
* system
*/
LIST_INSERT_HEAD(head, stcb, sctp_asocs);
sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
return (1);
}
return (0);
}
static int
sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
struct sctp_nets *net)
{
/*
* return 0 means we want you to proceed with the abort non-zero
* means no abort processing
*/
if (stcb->asoc.auth_supported == 0) {
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
return (0);
}
sctp_asconf_send_nat_state_update(stcb, net);
return (1);
}
static void
sctp_handle_abort(struct sctp_abort_chunk *abort,
struct sctp_tcb *stcb, struct sctp_nets *net)
{
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
uint16_t len;
uint16_t error;
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
if (stcb == NULL)
return;
len = ntohs(abort->ch.chunk_length);
if (len > sizeof(struct sctp_chunkhdr)) {
/*
* Need to check the cause codes for our two magic nat
* aborts which don't kill the assoc necessarily.
*/
struct sctp_gen_error_cause *cause;
cause = (struct sctp_gen_error_cause *)(abort + 1);
error = ntohs(cause->code);
if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
abort->ch.chunk_flags);
if (sctp_handle_nat_colliding_state(stcb)) {
return;
}
} else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
abort->ch.chunk_flags);
if (sctp_handle_nat_missing_state(stcb, net)) {
return;
}
}
} else {
error = 0;
}
/* stop any receive timers */
sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
/* notify user of the abort and clean up... */
sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
/* free the tcb */
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
#ifdef SCTP_ASOCLOG_OF_TSNS
sctp_print_out_track_log(stcb);
#endif
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
(void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
}
static void
sctp_start_net_timers(struct sctp_tcb *stcb)
{
uint32_t cnt_hb_sent;
struct sctp_nets *net;
cnt_hb_sent = 0;
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
/*
* For each network start: 1) A pmtu timer. 2) A HB timer 3)
* If the dest in unconfirmed send a hb as well if under
* max_hb_burst have been sent.
*/
sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
(cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
cnt_hb_sent++;
}
}
if (cnt_hb_sent) {
sctp_chunk_output(stcb->sctp_ep, stcb,
SCTP_OUTPUT_FROM_COOKIE_ACK,
SCTP_SO_NOT_LOCKED);
}
}
static void
sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
{
struct sctp_association *asoc;
int some_on_streamwheel;
int old_state;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_shutdown: handling SHUTDOWN\n");
if (stcb == NULL)
return;
asoc = &stcb->asoc;
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
return;
}
if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
/* Shutdown NOT the expected size */
return;
}
old_state = SCTP_GET_STATE(asoc);
sctp_update_acked(stcb, cp, abort_flag);
if (*abort_flag) {
return;
}
if (asoc->control_pdapi) {
/*
* With a normal shutdown we assume the end of last record.
*/
SCTP_INP_READ_LOCK(stcb->sctp_ep);
asoc->control_pdapi->end_added = 1;
asoc->control_pdapi->pdapi_aborted = 1;
asoc->control_pdapi = NULL;
SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
/* assoc was freed while we were unlocked */
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
#endif
sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
/* goto SHUTDOWN_RECEIVED state to block new requests */
if (stcb->sctp_socket) {
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_RECEIVED);
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
/*
* notify upper layer that peer has initiated a
* shutdown
*/
sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
/* reset time */
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
}
}
if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) {
/*
* stop the shutdown timer, since we WILL move to
* SHUTDOWN-ACK-SENT.
*/
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
}
/* Now is there unsent data on a stream somewhere? */
some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
if (!TAILQ_EMPTY(&asoc->send_queue) ||
!TAILQ_EMPTY(&asoc->sent_queue) ||
some_on_streamwheel) {
/* By returning we will push more data out */
return;
} else {
/* no outstanding data to send, so move on... */
/* send SHUTDOWN-ACK */
/* move to SHUTDOWN-ACK-SENT state */
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
sctp_stop_timers_for_shutdown(stcb);
sctp_send_shutdown_ack(stcb, net);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
stcb->sctp_ep, stcb, net);
} else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
sctp_send_shutdown_ack(stcb, net);
}
}
}
static void
sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
struct sctp_tcb *stcb,
struct sctp_nets *net)
{
struct sctp_association *asoc;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
so = SCTP_INP_SO(stcb->sctp_ep);
#endif
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
if (stcb == NULL)
return;
asoc = &stcb->asoc;
/* process according to association state */
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
/* unexpected SHUTDOWN-ACK... do OOTB handling... */
sctp_send_shutdown_complete(stcb, net, 1);
SCTP_TCB_UNLOCK(stcb);
return;
}
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
/* unexpected SHUTDOWN-ACK... so ignore... */
SCTP_TCB_UNLOCK(stcb);
return;
}
if (asoc->control_pdapi) {
/*
* With a normal shutdown we assume the end of last record.
*/
SCTP_INP_READ_LOCK(stcb->sctp_ep);
asoc->control_pdapi->end_added = 1;
asoc->control_pdapi->pdapi_aborted = 1;
asoc->control_pdapi = NULL;
SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
/* assoc was freed while we were unlocked */
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
#endif
sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
#ifdef INVARIANTS
if (!TAILQ_EMPTY(&asoc->send_queue) ||
!TAILQ_EMPTY(&asoc->sent_queue) ||
!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
panic("Queues are not empty when handling SHUTDOWN-ACK");
}
#endif
/* stop the timer */
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
/* send SHUTDOWN-COMPLETE */
sctp_send_shutdown_complete(stcb, net, 0);
/* notify upper layer protocol */
if (stcb->sctp_socket) {
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
stcb->sctp_socket->so_snd.sb_cc = 0;
}
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
}
SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
/* free the TCB but first save off the ep */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
/*
* Skip past the param header and then we will find the chunk that caused the
* problem. There are two possiblities ASCONF or FWD-TSN other than that and
* our peer must be broken.
*/
static void
sctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr,
struct sctp_nets *net)
{
struct sctp_chunkhdr *chk;
chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr));
switch (chk->chunk_type) {
case SCTP_ASCONF_ACK:
case SCTP_ASCONF:
sctp_asconf_cleanup(stcb, net);
break;
case SCTP_FORWARD_CUM_TSN:
stcb->asoc.prsctp_supported = 0;
break;
default:
SCTPDBG(SCTP_DEBUG_INPUT2,
"Peer does not support chunk type %d(%x)??\n",
chk->chunk_type, (uint32_t) chk->chunk_type);
break;
}
}
/*
* Skip past the param header and then we will find the param that caused the
* problem. There are a number of param's in a ASCONF OR the prsctp param
* these will turn of specific features.
* XXX: Is this the right thing to do?
*/
static void
sctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr)
{
struct sctp_paramhdr *pbad;
pbad = phdr + 1;
switch (ntohs(pbad->param_type)) {
/* pr-sctp draft */
case SCTP_PRSCTP_SUPPORTED:
stcb->asoc.prsctp_supported = 0;
break;
case SCTP_SUPPORTED_CHUNK_EXT:
break;
/* draft-ietf-tsvwg-addip-sctp */
case SCTP_HAS_NAT_SUPPORT:
stcb->asoc.peer_supports_nat = 0;
break;
case SCTP_ADD_IP_ADDRESS:
case SCTP_DEL_IP_ADDRESS:
case SCTP_SET_PRIM_ADDR:
stcb->asoc.asconf_supported = 0;
break;
case SCTP_SUCCESS_REPORT:
case SCTP_ERROR_CAUSE_IND:
SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
SCTPDBG(SCTP_DEBUG_INPUT2,
"Turning off ASCONF to this strange peer\n");
stcb->asoc.asconf_supported = 0;
break;
default:
SCTPDBG(SCTP_DEBUG_INPUT2,
"Peer does not support param type %d(%x)??\n",
pbad->param_type, (uint32_t) pbad->param_type);
break;
}
}
static int
sctp_handle_error(struct sctp_chunkhdr *ch,
struct sctp_tcb *stcb, struct sctp_nets *net)
{
int chklen;
struct sctp_paramhdr *phdr;
uint16_t error, error_type;
uint16_t error_len;
struct sctp_association *asoc;
int adjust;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
/* parse through all of the errors and process */
asoc = &stcb->asoc;
phdr = (struct sctp_paramhdr *)((caddr_t)ch +
sizeof(struct sctp_chunkhdr));
chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr);
error = 0;
while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) {
/* Process an Error Cause */
error_type = ntohs(phdr->param_type);
error_len = ntohs(phdr->param_length);
if ((error_len > chklen) || (error_len == 0)) {
/* invalid param length for this param */
SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in error param- chunk left:%d errorlen:%d\n",
chklen, error_len);
return (0);
}
if (error == 0) {
/* report the first error cause */
error = error_type;
}
switch (error_type) {
case SCTP_CAUSE_INVALID_STREAM:
case SCTP_CAUSE_MISSING_PARAM:
case SCTP_CAUSE_INVALID_PARAM:
case SCTP_CAUSE_NO_USER_DATA:
SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %d back? We have a bug :/ (or do they?)\n",
error_type);
break;
case SCTP_CAUSE_NAT_COLLIDING_STATE:
SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
ch->chunk_flags);
if (sctp_handle_nat_colliding_state(stcb)) {
return (0);
}
break;
case SCTP_CAUSE_NAT_MISSING_STATE:
SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
ch->chunk_flags);
if (sctp_handle_nat_missing_state(stcb, net)) {
return (0);
}
break;
case SCTP_CAUSE_STALE_COOKIE:
/*
* We only act if we have echoed a cookie and are
* waiting.
*/
if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
int *p;
p = (int *)((caddr_t)phdr + sizeof(*phdr));
/* Save the time doubled */
asoc->cookie_preserve_req = ntohl(*p) << 1;
asoc->stale_cookie_count++;
if (asoc->stale_cookie_count >
asoc->max_init_times) {
sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
/* now free the asoc */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
return (-1);
}
/* blast back to INIT state */
sctp_toss_old_cookies(stcb, &stcb->asoc);
asoc->state &= ~SCTP_STATE_COOKIE_ECHOED;
asoc->state |= SCTP_STATE_COOKIE_WAIT;
sctp_stop_all_cookie_timers(stcb);
sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
}
break;
case SCTP_CAUSE_UNRESOLVABLE_ADDR:
/*
* Nothing we can do here, we don't do hostname
* addresses so if the peer does not like my IPv6
* (or IPv4 for that matter) it does not matter. If
* they don't support that type of address, they can
* NOT possibly get that packet type... i.e. with no
* IPv6 you can't recieve a IPv6 packet. so we can
* safely ignore this one. If we ever added support
* for HOSTNAME Addresses, then we would need to do
* something here.
*/
break;
case SCTP_CAUSE_UNRECOG_CHUNK:
sctp_process_unrecog_chunk(stcb, phdr, net);
break;
case SCTP_CAUSE_UNRECOG_PARAM:
sctp_process_unrecog_param(stcb, phdr);
break;
case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
/*
* We ignore this since the timer will drive out a
* new cookie anyway and there timer will drive us
* to send a SHUTDOWN_COMPLETE. We can't send one
* here since we don't have their tag.
*/
break;
case SCTP_CAUSE_DELETING_LAST_ADDR:
case SCTP_CAUSE_RESOURCE_SHORTAGE:
case SCTP_CAUSE_DELETING_SRC_ADDR:
/*
* We should NOT get these here, but in a
* ASCONF-ACK.
*/
SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a Operational Error?<%d>?\n",
error_type);
break;
case SCTP_CAUSE_OUT_OF_RESC:
/*
* And what, pray tell do we do with the fact that
* the peer is out of resources? Not really sure we
* could do anything but abort. I suspect this
* should have came WITH an abort instead of in a
* OP-ERROR.
*/
break;
default:
SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown error type = 0x%xh\n",
error_type);
break;
}
adjust = SCTP_SIZE32(error_len);
chklen -= adjust;
phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust);
}
sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, error, ch, SCTP_SO_NOT_LOCKED);
return (0);
}
static int
sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
struct sctp_nets *net, int *abort_no_unlock,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id)
{
struct sctp_init_ack *init_ack;
struct mbuf *op_err;
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_init_ack: handling INIT-ACK\n");
if (stcb == NULL) {
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_init_ack: TCB is null\n");
return (-1);
}
if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
/* Invalid length */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, net->port);
*abort_no_unlock = 1;
return (-1);
}
init_ack = &cp->init;
/* validate parameters */
if (init_ack->initiate_tag == 0) {
/* protocol error... send an abort */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, net->port);
*abort_no_unlock = 1;
return (-1);
}
if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
/* protocol error... send an abort */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, net->port);
*abort_no_unlock = 1;
return (-1);
}
if (init_ack->num_inbound_streams == 0) {
/* protocol error... send an abort */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, net->port);
*abort_no_unlock = 1;
return (-1);
}
if (init_ack->num_outbound_streams == 0) {
/* protocol error... send an abort */
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, net->port);
*abort_no_unlock = 1;
return (-1);
}
/* process according to association state... */
switch (stcb->asoc.state & SCTP_STATE_MASK) {
case SCTP_STATE_COOKIE_WAIT:
/* this is the expected state for this chunk */
/* process the INIT-ACK parameters */
if (stcb->asoc.primary_destination->dest_state &
SCTP_ADDR_UNCONFIRMED) {
/*
* The primary is where we sent the INIT, we can
* always consider it confirmed when the INIT-ACK is
* returned. Do this before we load addresses
* though.
*/
stcb->asoc.primary_destination->dest_state &=
~SCTP_ADDR_UNCONFIRMED;
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
}
if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
net, abort_no_unlock,
mflowtype, mflowid,
vrf_id) < 0) {
/* error in parsing parameters */
return (-1);
}
/* update our state */
SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_ECHOED);
/* reset the RTO calc */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
(void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
/*
* collapse the init timer back in case of a exponential
* backoff
*/
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
stcb, net);
/*
* the send at the end of the inbound data processing will
* cause the cookie to be sent
*/
break;
case SCTP_STATE_SHUTDOWN_SENT:
/* incorrect state... discard */
break;
case SCTP_STATE_COOKIE_ECHOED:
/* incorrect state... discard */
break;
case SCTP_STATE_OPEN:
/* incorrect state... discard */
break;
case SCTP_STATE_EMPTY:
case SCTP_STATE_INUSE:
default:
/* incorrect state... discard */
return (-1);
break;
}
SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
return (0);
}
static struct sctp_tcb *
sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
struct sctp_inpcb *inp, struct sctp_nets **netp,
struct sockaddr *init_src, int *notification,
int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id, uint16_t port);
/*
* handle a state cookie for an existing association m: input packet mbuf
* chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
* "split" mbuf and the cookie signature does not exist offset: offset into
* mbuf to the cookie-echo chunk
*/
static struct sctp_tcb *
sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
struct sockaddr *init_src, int *notification,
int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id, uint16_t port)
{
struct sctp_association *asoc;
struct sctp_init_chunk *init_cp, init_buf;
struct sctp_init_ack_chunk *initack_cp, initack_buf;
struct sctp_nets *net;
struct mbuf *op_err;
int init_offset, initack_offset, i;
int retval;
int spec_flag = 0;
uint32_t how_indx;
#if defined(SCTP_DETAILED_STR_STATS)
int j;
#endif
net = *netp;
/* I know that the TCB is non-NULL from the caller */
asoc = &stcb->asoc;
for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
if (asoc->cookie_how[how_indx] == 0)
break;
}
if (how_indx < sizeof(asoc->cookie_how)) {
asoc->cookie_how[how_indx] = 1;
}
if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
/* SHUTDOWN came in after sending INIT-ACK */
sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, net->port);
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 2;
return (NULL);
}
/*
* find and validate the INIT chunk in the cookie (peer's info) the
* INIT should start after the cookie-echo header struct (chunk
* header, state cookie header struct)
*/
init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
init_cp = (struct sctp_init_chunk *)
sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
(uint8_t *) & init_buf);
if (init_cp == NULL) {
/* could not pull a INIT chunk in cookie */
return (NULL);
}
if (init_cp->ch.chunk_type != SCTP_INITIATION) {
return (NULL);
}
/*
* find and validate the INIT-ACK chunk in the cookie (my info) the
* INIT-ACK follows the INIT chunk
*/
initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
initack_cp = (struct sctp_init_ack_chunk *)
sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
(uint8_t *) & initack_buf);
if (initack_cp == NULL) {
/* could not pull INIT-ACK chunk in cookie */
return (NULL);
}
if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
return (NULL);
}
if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
(ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
/*
* case D in Section 5.2.4 Table 2: MMAA process accordingly
* to get into the OPEN state
*/
if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
/*-
* Opps, this means that we somehow generated two vtag's
* the same. I.e. we did:
* Us Peer
* <---INIT(tag=a)------
* ----INIT-ACK(tag=t)-->
* ----INIT(tag=t)------> *1
* <---INIT-ACK(tag=a)---
* <----CE(tag=t)------------- *2
*
* At point *1 we should be generating a different
* tag t'. Which means we would throw away the CE and send
* ours instead. Basically this is case C (throw away side).
*/
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 17;
return (NULL);
}
switch (SCTP_GET_STATE(asoc)) {
case SCTP_STATE_COOKIE_WAIT:
case SCTP_STATE_COOKIE_ECHOED:
/*
* INIT was sent but got a COOKIE_ECHO with the
* correct tags... just accept it...but we must
* process the init so that we can make sure we have
* the right seq no's.
*/
/* First we must process the INIT !! */
retval = sctp_process_init(init_cp, stcb);
if (retval < 0) {
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 3;
return (NULL);
}
/* we have already processed the INIT so no problem */
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
/* update current state */
if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
else
SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
stcb->sctp_ep, stcb, asoc->primary_destination);
}
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
sctp_stop_all_cookie_timers(stcb);
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
(inp->sctp_socket->so_qlimit == 0)
) {
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
/*
* Here is where collision would go if we
* did a connect() and instead got a
* init/init-ack/cookie done before the
* init-ack came back..
*/
stcb->sctp_ep->sctp_flags |=
SCTP_PCB_FLAGS_CONNECTED;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_add_int(&stcb->asoc.refcnt, -1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
SCTP_SOCKET_UNLOCK(so, 1);
return (NULL);
}
#endif
soisconnected(stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
/* notify upper layer */
*notification = SCTP_NOTIFY_ASSOC_UP;
/*
* since we did not send a HB make sure we don't
* double things
*/
net->hb_responded = 1;
net->RTO = sctp_calculate_rto(stcb, asoc, net,
&cookie->time_entered,
sctp_align_unsafe_makecopy,
SCTP_RTT_FROM_NON_DATA);
if (stcb->asoc.sctp_autoclose_ticks &&
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
inp, stcb, NULL);
}
break;
default:
/*
* we're in the OPEN state (or beyond), so peer must
* have simply lost the COOKIE-ACK
*/
break;
} /* end switch */
sctp_stop_all_cookie_timers(stcb);
/*
* We ignore the return code here.. not sure if we should
* somehow abort.. but we do have an existing asoc. This
* really should not fail.
*/
if (sctp_load_addresses_from_init(stcb, m,
init_offset + sizeof(struct sctp_init_chunk),
initack_offset, src, dst, init_src)) {
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 4;
return (NULL);
}
/* respond with a COOKIE-ACK */
sctp_toss_old_cookies(stcb, asoc);
sctp_send_cookie_ack(stcb);
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 5;
return (stcb);
}
if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
cookie->tie_tag_my_vtag == 0 &&
cookie->tie_tag_peer_vtag == 0) {
/*
* case C in Section 5.2.4 Table 2: XMOO silently discard
*/
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 6;
return (NULL);
}
/*
* If nat support, and the below and stcb is established, send back
* a ABORT(colliding state) if we are established.
*/
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) &&
(asoc->peer_supports_nat) &&
((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
(asoc->peer_vtag == 0)))) {
/*
* Special case - Peer's support nat. We may have two init's
* that we gave out the same tag on since one was not
* established.. i.e. we get INIT from host-1 behind the nat
* and we respond tag-a, we get a INIT from host-2 behind
* the nat and we get tag-a again. Then we bring up host-1
* (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
* Now we have colliding state. We must send an abort here
* with colliding state indication.
*/
op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
return (NULL);
}
if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
(asoc->peer_vtag == 0))) {
/*
* case B in Section 5.2.4 Table 2: MXAA or MOAA my info
* should be ok, re-accept peer info
*/
if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
/*
* Extension of case C. If we hit this, then the
* random number generator returned the same vtag
* when we first sent our INIT-ACK and when we later
* sent our INIT. The side with the seq numbers that
* are different will be the one that normnally
* would have hit case C. This in effect "extends"
* our vtags in this collision case to be 64 bits.
* The same collision could occur aka you get both
* vtag and seq number the same twice in a row.. but
* is much less likely. If it did happen then we
* would proceed through and bring up the assoc.. we
* may end up with the wrong stream setup however..
* which would be bad.. but there is no way to
* tell.. until we send on a stream that does not
* exist :-)
*/
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 7;
return (NULL);
}
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 8;
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
sctp_stop_all_cookie_timers(stcb);
/*
* since we did not send a HB make sure we don't double
* things
*/
net->hb_responded = 1;
if (stcb->asoc.sctp_autoclose_ticks &&
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
NULL);
}
asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
/*
* Ok the peer probably discarded our data (if we
* echoed a cookie+data). So anything on the
* sent_queue should be marked for retransmit, we
* may not get something to kick us so it COULD
* still take a timeout to move these.. but it can't
* hurt to mark them.
*/
struct sctp_tmit_chunk *chk;
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
if (chk->sent < SCTP_DATAGRAM_RESEND) {
chk->sent = SCTP_DATAGRAM_RESEND;
sctp_flight_size_decrease(chk);
sctp_total_flight_decrease(stcb, chk);
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
spec_flag++;
}
}
}
/* process the INIT info (peer's info) */
retval = sctp_process_init(init_cp, stcb);
if (retval < 0) {
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 9;
return (NULL);
}
if (sctp_load_addresses_from_init(stcb, m,
init_offset + sizeof(struct sctp_init_chunk),
initack_offset, src, dst, init_src)) {
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 10;
return (NULL);
}
if ((asoc->state & SCTP_STATE_COOKIE_WAIT) ||
(asoc->state & SCTP_STATE_COOKIE_ECHOED)) {
*notification = SCTP_NOTIFY_ASSOC_UP;
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
(inp->sctp_socket->so_qlimit == 0)) {
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
stcb->sctp_ep->sctp_flags |=
SCTP_PCB_FLAGS_CONNECTED;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_add_int(&stcb->asoc.refcnt, -1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
SCTP_SOCKET_UNLOCK(so, 1);
return (NULL);
}
#endif
soisconnected(stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
else
SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
} else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
} else {
SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
}
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
stcb->sctp_ep, stcb, asoc->primary_destination);
}
sctp_stop_all_cookie_timers(stcb);
sctp_toss_old_cookies(stcb, asoc);
sctp_send_cookie_ack(stcb);
if (spec_flag) {
/*
* only if we have retrans set do we do this. What
* this call does is get only the COOKIE-ACK out and
* then when we return the normal call to
* sctp_chunk_output will get the retrans out behind
* this.
*/
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
}
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 11;
return (stcb);
}
if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
cookie->tie_tag_peer_vtag != 0) {
struct sctpasochead *head;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
if (asoc->peer_supports_nat) {
/*
* This is a gross gross hack. Just call the
* cookie_new code since we are allowing a duplicate
* association. I hope this works...
*/
return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
sh, cookie, cookie_len,
inp, netp, init_src, notification,
auth_skipped, auth_offset, auth_len,
mflowtype, mflowid,
vrf_id, port));
}
/*
* case A in Section 5.2.4 Table 2: XXMM (peer restarted)
*/
/* temp code */
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 12;
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
/* notify upper layer */
*notification = SCTP_NOTIFY_ASSOC_RESTART;
atomic_add_int(&stcb->asoc.refcnt, 1);
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
}
if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
} else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
}
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
stcb->sctp_ep, stcb, asoc->primary_destination);
} else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) {
/* move to OPEN state, if not in SHUTDOWN_SENT */
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
}
asoc->pre_open_streams =
ntohs(initack_cp->init.num_outbound_streams);
asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
asoc->str_reset_seq_in = asoc->init_seq_number;
asoc->advanced_peer_ack_point = asoc->last_acked_seq;
if (asoc->mapping_array) {
memset(asoc->mapping_array, 0,
asoc->mapping_array_size);
}
if (asoc->nr_mapping_array) {
memset(asoc->nr_mapping_array, 0,
asoc->mapping_array_size);
}
SCTP_TCB_UNLOCK(stcb);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
SCTP_SOCKET_LOCK(so, 1);
#endif
SCTP_INP_INFO_WLOCK();
SCTP_INP_WLOCK(stcb->sctp_ep);
SCTP_TCB_LOCK(stcb);
atomic_add_int(&stcb->asoc.refcnt, -1);
/* send up all the data */
SCTP_TCB_SEND_LOCK(stcb);
sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
stcb->asoc.strmout[i].chunks_on_queues = 0;
#if defined(SCTP_DETAILED_STR_STATS)
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
asoc->strmout[i].abandoned_sent[j] = 0;
asoc->strmout[i].abandoned_unsent[j] = 0;
}
#else
asoc->strmout[i].abandoned_sent[0] = 0;
asoc->strmout[i].abandoned_unsent[0] = 0;
#endif
stcb->asoc.strmout[i].stream_no = i;
stcb->asoc.strmout[i].next_sequence_send = 0;
stcb->asoc.strmout[i].last_msg_incomplete = 0;
}
/* process the INIT-ACK info (my info) */
asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
/* pull from vtag hash */
LIST_REMOVE(stcb, sctp_asocs);
/* re-insert to new vtag position */
head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
SCTP_BASE_INFO(hashasocmark))];
/*
* put it in the bucket in the vtag hash of assoc's for the
* system
*/
LIST_INSERT_HEAD(head, stcb, sctp_asocs);
SCTP_TCB_SEND_UNLOCK(stcb);
SCTP_INP_WUNLOCK(stcb->sctp_ep);
SCTP_INP_INFO_WUNLOCK();
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
asoc->total_flight = 0;
asoc->total_flight_count = 0;
/* process the INIT info (peer's info) */
retval = sctp_process_init(init_cp, stcb);
if (retval < 0) {
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 13;
return (NULL);
}
/*
* since we did not send a HB make sure we don't double
* things
*/
net->hb_responded = 1;
if (sctp_load_addresses_from_init(stcb, m,
init_offset + sizeof(struct sctp_init_chunk),
initack_offset, src, dst, init_src)) {
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 14;
return (NULL);
}
/* respond with a COOKIE-ACK */
sctp_stop_all_cookie_timers(stcb);
sctp_toss_old_cookies(stcb, asoc);
sctp_send_cookie_ack(stcb);
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 15;
return (stcb);
}
if (how_indx < sizeof(asoc->cookie_how))
asoc->cookie_how[how_indx] = 16;
/* all other cases... */
return (NULL);
}
/*
* handle a state cookie for a new association m: input packet mbuf chain--
* assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
* and the cookie signature does not exist offset: offset into mbuf to the
* cookie-echo chunk length: length of the cookie chunk to: where the init
* was from returns a new TCB
*/
static struct sctp_tcb *
sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
struct sctp_inpcb *inp, struct sctp_nets **netp,
struct sockaddr *init_src, int *notification,
int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id, uint16_t port)
{
struct sctp_tcb *stcb;
struct sctp_init_chunk *init_cp, init_buf;
struct sctp_init_ack_chunk *initack_cp, initack_buf;
union sctp_sockstore store;
struct sctp_association *asoc;
int init_offset, initack_offset, initack_limit;
int retval;
int error = 0;
uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
so = SCTP_INP_SO(inp);
#endif
/*
* find and validate the INIT chunk in the cookie (peer's info) the
* INIT should start after the cookie-echo header struct (chunk
* header, state cookie header struct)
*/
init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
init_cp = (struct sctp_init_chunk *)
sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
(uint8_t *) & init_buf);
if (init_cp == NULL) {
/* could not pull a INIT chunk in cookie */
SCTPDBG(SCTP_DEBUG_INPUT1,
"process_cookie_new: could not pull INIT chunk hdr\n");
return (NULL);
}
if (init_cp->ch.chunk_type != SCTP_INITIATION) {
SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
return (NULL);
}
initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
/*
* find and validate the INIT-ACK chunk in the cookie (my info) the
* INIT-ACK follows the INIT chunk
*/
initack_cp = (struct sctp_init_ack_chunk *)
sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
(uint8_t *) & initack_buf);
if (initack_cp == NULL) {
/* could not pull INIT-ACK chunk in cookie */
SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
return (NULL);
}
if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
return (NULL);
}
/*
* NOTE: We can't use the INIT_ACK's chk_length to determine the
* "initack_limit" value. This is because the chk_length field
* includes the length of the cookie, but the cookie is omitted when
* the INIT and INIT_ACK are tacked onto the cookie...
*/
initack_limit = offset + cookie_len;
/*
* now that we know the INIT/INIT-ACK are in place, create a new TCB
* and popluate
*/
/*
* Here we do a trick, we set in NULL for the proc/thread argument.
* We do this since in effect we only use the p argument when the
* socket is unbound and we must do an implicit bind. Since we are
* getting a cookie, we cannot be unbound.
*/
stcb = sctp_aloc_assoc(inp, init_src, &error,
ntohl(initack_cp->init.initiate_tag), vrf_id,
ntohs(initack_cp->init.num_outbound_streams),
(struct thread *)NULL
);
if (stcb == NULL) {
struct mbuf *op_err;
/* memory problem? */
SCTPDBG(SCTP_DEBUG_INPUT1,
"process_cookie_new: no room for another TCB!\n");
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
return (NULL);
}
/* get the correct sctp_nets */
if (netp)
*netp = sctp_findnet(stcb, init_src);
asoc = &stcb->asoc;
/* get scope variables out of cookie */
asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
asoc->scope.site_scope = cookie->site_scope;
asoc->scope.local_scope = cookie->local_scope;
asoc->scope.loopback_scope = cookie->loopback_scope;
if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
(asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
struct mbuf *op_err;
/*
* Houston we have a problem. The EP changed while the
* cookie was in flight. Only recourse is to abort the
* association.
*/
atomic_add_int(&stcb->asoc.refcnt, 1);
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
atomic_subtract_int(&stcb->asoc.refcnt, 1);
return (NULL);
}
/* process the INIT-ACK info (my info) */
asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
asoc->str_reset_seq_in = asoc->init_seq_number;
asoc->advanced_peer_ack_point = asoc->last_acked_seq;
/* process the INIT info (peer's info) */
if (netp)
retval = sctp_process_init(init_cp, stcb);
else
retval = 0;
if (retval < 0) {
atomic_add_int(&stcb->asoc.refcnt, 1);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
atomic_subtract_int(&stcb->asoc.refcnt, 1);
return (NULL);
}
/* load all addresses */
if (sctp_load_addresses_from_init(stcb, m,
init_offset + sizeof(struct sctp_init_chunk), initack_offset,
src, dst, init_src)) {
atomic_add_int(&stcb->asoc.refcnt, 1);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
atomic_subtract_int(&stcb->asoc.refcnt, 1);
return (NULL);
}
/*
* verify any preceding AUTH chunk that was skipped
*/
/* pull the local authentication parameters from the cookie/init-ack */
sctp_auth_get_cookie_params(stcb, m,
initack_offset + sizeof(struct sctp_init_ack_chunk),
initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
if (auth_skipped) {
struct sctp_auth_chunk *auth;
auth = (struct sctp_auth_chunk *)
sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
/* auth HMAC failed, dump the assoc and packet */
SCTPDBG(SCTP_DEBUG_AUTH1,
"COOKIE-ECHO: AUTH failed\n");
atomic_add_int(&stcb->asoc.refcnt, 1);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
atomic_subtract_int(&stcb->asoc.refcnt, 1);
return (NULL);
} else {
/* remaining chunks checked... good to go */
stcb->asoc.authenticated = 1;
}
}
/* update current state */
SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
stcb->sctp_ep, stcb, asoc->primary_destination);
}
sctp_stop_all_cookie_timers(stcb);
SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
/*
* if we're doing ASCONFs, check to see if we have any new local
* addresses that need to get added to the peer (eg. addresses
* changed while cookie echo in flight). This needs to be done
* after we go to the OPEN state to do the correct asconf
* processing. else, make sure we have the correct addresses in our
* lists
*/
/* warning, we re-use sin, sin6, sa_store here! */
/* pull in local_address (our "from" address) */
switch (cookie->laddr_type) {
#ifdef INET
case SCTP_IPV4_ADDRESS:
/* source addr is IPv4 */
memset(&store.sin, 0, sizeof(struct sockaddr_in));
store.sin.sin_family = AF_INET;
store.sin.sin_len = sizeof(struct sockaddr_in);
store.sin.sin_addr.s_addr = cookie->laddress[0];
break;
#endif
#ifdef INET6
case SCTP_IPV6_ADDRESS:
/* source addr is IPv6 */
memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
store.sin6.sin6_family = AF_INET6;
store.sin6.sin6_len = sizeof(struct sockaddr_in6);
store.sin6.sin6_scope_id = cookie->scope_id;
memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
break;
#endif
default:
atomic_add_int(&stcb->asoc.refcnt, 1);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
atomic_subtract_int(&stcb->asoc.refcnt, 1);
return (NULL);
}
/* set up to notify upper layer */
*notification = SCTP_NOTIFY_ASSOC_UP;
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
(inp->sctp_socket->so_qlimit == 0)) {
/*
* This is an endpoint that called connect() how it got a
* cookie that is NEW is a bit of a mystery. It must be that
* the INIT was sent, but before it got there.. a complete
* INIT/INIT-ACK/COOKIE arrived. But of course then it
* should have went to the other code.. not here.. oh well..
* a bit of protection is worth having..
*/
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
SCTP_SOCKET_UNLOCK(so, 1);
return (NULL);
}
#endif
soisconnected(stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
} else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
(inp->sctp_socket->so_qlimit)) {
/*
* We don't want to do anything with this one. Since it is
* the listening guy. The timer will get started for
* accepted connections in the caller.
*/
;
}
/* since we did not send a HB make sure we don't double things */
if ((netp) && (*netp))
(*netp)->hb_responded = 1;
if (stcb->asoc.sctp_autoclose_ticks &&
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
}
(void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
if ((netp != NULL) && (*netp != NULL)) {
/* calculate the RTT and set the encaps port */
(*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
&cookie->time_entered, sctp_align_unsafe_makecopy,
SCTP_RTT_FROM_NON_DATA);
#if defined(INET) || defined(INET6)
if (((*netp)->port == 0) && (port != 0)) {
sctp_pathmtu_adjustment(stcb, (*netp)->mtu - sizeof(struct udphdr));
}
(*netp)->port = port;
#endif
}
/* respond with a COOKIE-ACK */
sctp_send_cookie_ack(stcb);
/*
* check the address lists for any ASCONFs that need to be sent
* AFTER the cookie-ack is sent
*/
sctp_check_address_list(stcb, m,
initack_offset + sizeof(struct sctp_init_ack_chunk),
initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
&store.sa, cookie->local_scope, cookie->site_scope,
cookie->ipv4_scope, cookie->loopback_scope);
return (stcb);
}
/*
* CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
* we NEED to make sure we are not already using the vtag. If so we
* need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
SCTP_BASE_INFO(hashasocmark))];
LIST_FOREACH(stcb, head, sctp_asocs) {
if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
-- SEND ABORT - TRY AGAIN --
}
}
*/
/*
* handles a COOKIE-ECHO message stcb: modified to either a new or left as
* existing (non-NULL) TCB
*/
static struct mbuf *
sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
struct sctp_tcb **locked_tcb,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id, uint16_t port)
{
struct sctp_state_cookie *cookie;
struct sctp_tcb *l_stcb = *stcb;
struct sctp_inpcb *l_inp;
struct sockaddr *to;
struct sctp_pcb *ep;
struct mbuf *m_sig;
uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
uint8_t *sig;
uint8_t cookie_ok = 0;
unsigned int sig_offset, cookie_offset;
unsigned int cookie_len;
struct timeval now;
struct timeval time_expires;
int notification = 0;
struct sctp_nets *netl;
int had_a_existing_tcb = 0;
int send_int_conf = 0;
#ifdef INET
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_cookie: handling COOKIE-ECHO\n");
if (inp_p == NULL) {
return (NULL);
}
cookie = &cp->cookie;
cookie_offset = offset + sizeof(struct sctp_chunkhdr);
cookie_len = ntohs(cp->ch.chunk_length);
if ((cookie->peerport != sh->src_port) ||
(cookie->myport != sh->dest_port) ||
(cookie->my_vtag != sh->v_tag)) {
/*
* invalid ports or bad tag. Note that we always leave the
* v_tag in the header in network order and when we stored
* it in the my_vtag slot we also left it in network order.
* This maintains the match even though it may be in the
* opposite byte order of the machine :->
*/
return (NULL);
}
if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
sizeof(struct sctp_init_chunk) +
sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
/* cookie too small */
return (NULL);
}
/*
* split off the signature into its own mbuf (since it should not be
* calculated in the sctp_hmac_m() call).
*/
sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
m_sig = m_split(m, sig_offset, M_NOWAIT);
if (m_sig == NULL) {
/* out of memory or ?? */
return (NULL);
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
}
#endif
/*
* compute the signature/digest for the cookie
*/
ep = &(*inp_p)->sctp_ep;
l_inp = *inp_p;
if (l_stcb) {
SCTP_TCB_UNLOCK(l_stcb);
}
SCTP_INP_RLOCK(l_inp);
if (l_stcb) {
SCTP_TCB_LOCK(l_stcb);
}
/* which cookie is it? */
if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
(ep->current_secret_number != ep->last_secret_number)) {
/* it's the old cookie */
(void)sctp_hmac_m(SCTP_HMAC,
(uint8_t *) ep->secret_key[(int)ep->last_secret_number],
SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
} else {
/* it's the current cookie */
(void)sctp_hmac_m(SCTP_HMAC,
(uint8_t *) ep->secret_key[(int)ep->current_secret_number],
SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
}
/* get the signature */
SCTP_INP_RUNLOCK(l_inp);
sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig);
if (sig == NULL) {
/* couldn't find signature */
sctp_m_freem(m_sig);
return (NULL);
}
/* compare the received digest with the computed digest */
if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
/* try the old cookie? */
if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
(ep->current_secret_number != ep->last_secret_number)) {
/* compute digest with old */
(void)sctp_hmac_m(SCTP_HMAC,
(uint8_t *) ep->secret_key[(int)ep->last_secret_number],
SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
/* compare */
if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
cookie_ok = 1;
}
} else {
cookie_ok = 1;
}
/*
* Now before we continue we must reconstruct our mbuf so that
* normal processing of any other chunks will work.
*/
{
struct mbuf *m_at;
m_at = m;
while (SCTP_BUF_NEXT(m_at) != NULL) {
m_at = SCTP_BUF_NEXT(m_at);
}
SCTP_BUF_NEXT(m_at) = m_sig;
}
if (cookie_ok == 0) {
SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
SCTPDBG(SCTP_DEBUG_INPUT2,
"offset = %u, cookie_offset = %u, sig_offset = %u\n",
(uint32_t) offset, cookie_offset, sig_offset);
return (NULL);
}
/*
* check the cookie timestamps to be sure it's not stale
*/
(void)SCTP_GETTIME_TIMEVAL(&now);
/* Expire time is in Ticks, so we convert to seconds */
time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
time_expires.tv_usec = cookie->time_entered.tv_usec;
/*
* TODO sctp_constants.h needs alternative time macros when _KERNEL
* is undefined.
*/
if (timevalcmp(&now, &time_expires, >)) {
/* cookie is stale! */
struct mbuf *op_err;
struct sctp_error_stale_cookie *cause;
uint32_t tim;
op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
0, M_NOWAIT, 1, MT_DATA);
if (op_err == NULL) {
/* FOOBAR */
return (NULL);
}
/* Set the len */
SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
cause = mtod(op_err, struct sctp_error_stale_cookie *);
cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
(sizeof(uint32_t))));
/* seconds to usec */
tim = (now.tv_sec - time_expires.tv_sec) * 1000000;
/* add in usec */
if (tim == 0)
tim = now.tv_usec - cookie->time_entered.tv_usec;
cause->stale_time = htonl(tim);
sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
mflowtype, mflowid, l_inp->fibnum,
vrf_id, port);
return (NULL);
}
/*
* Now we must see with the lookup address if we have an existing
* asoc. This will only happen if we were in the COOKIE-WAIT state
* and a INIT collided with us and somewhere the peer sent the
* cookie on another address besides the single address our assoc
* had for him. In this case we will have one of the tie-tags set at
* least AND the address field in the cookie can be used to look it
* up.
*/
to = NULL;
switch (cookie->addr_type) {
#ifdef INET6
case SCTP_IPV6_ADDRESS:
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(sin6);
sin6.sin6_port = sh->src_port;
sin6.sin6_scope_id = cookie->scope_id;
memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
sizeof(sin6.sin6_addr.s6_addr));
to = (struct sockaddr *)&sin6;
break;
#endif
#ifdef INET
case SCTP_IPV4_ADDRESS:
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_len = sizeof(sin);
sin.sin_port = sh->src_port;
sin.sin_addr.s_addr = cookie->address[0];
to = (struct sockaddr *)&sin;
break;
#endif
default:
/* This should not happen */
return (NULL);
}
if (*stcb == NULL) {
/* Yep, lets check */
*stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
if (*stcb == NULL) {
/*
* We should have only got back the same inp. If we
* got back a different ep we have a problem. The
* original findep got back l_inp and now
*/
if (l_inp != *inp_p) {
SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
}
} else {
if (*locked_tcb == NULL) {
/*
* In this case we found the assoc only
* after we locked the create lock. This
* means we are in a colliding case and we
* must make sure that we unlock the tcb if
* its one of the cases where we throw away
* the incoming packets.
*/
*locked_tcb = *stcb;
/*
* We must also increment the inp ref count
* since the ref_count flags was set when we
* did not find the TCB, now we found it
* which reduces the refcount.. we must
* raise it back out to balance it all :-)
*/
SCTP_INP_INCR_REF((*stcb)->sctp_ep);
if ((*stcb)->sctp_ep != l_inp) {
SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
(void *)(*stcb)->sctp_ep, (void *)l_inp);
}
}
}
}
cookie_len -= SCTP_SIGNATURE_SIZE;
if (*stcb == NULL) {
/* this is the "normal" case... get a new TCB */
*stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
cookie, cookie_len, *inp_p,
netp, to, &notification,
auth_skipped, auth_offset, auth_len,
mflowtype, mflowid,
vrf_id, port);
} else {
/* this is abnormal... cookie-echo on existing TCB */
had_a_existing_tcb = 1;
*stcb = sctp_process_cookie_existing(m, iphlen, offset,
src, dst, sh,
cookie, cookie_len, *inp_p, *stcb, netp, to,
&notification, auth_skipped, auth_offset, auth_len,
mflowtype, mflowid,
vrf_id, port);
}
if (*stcb == NULL) {
/* still no TCB... must be bad cookie-echo */
return (NULL);
}
if (*netp != NULL) {
(*netp)->flowtype = mflowtype;
(*netp)->flowid = mflowid;
}
/*
* Ok, we built an association so confirm the address we sent the
* INIT-ACK to.
*/
netl = sctp_findnet(*stcb, to);
/*
* This code should in theory NOT run but
*/
if (netl == NULL) {
/* TSNH! Huh, why do I need to add this address here? */
if (sctp_add_remote_addr(*stcb, to, NULL, SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
return (NULL);
}
netl = sctp_findnet(*stcb, to);
}
if (netl) {
if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
(void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
netl);
send_int_conf = 1;
}
}
sctp_start_net_timers(*stcb);
if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
if (!had_a_existing_tcb ||
(((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
/*
* If we have a NEW cookie or the connect never
* reached the connected state during collision we
* must do the TCP accept thing.
*/
struct socket *so, *oso;
struct sctp_inpcb *inp;
if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
/*
* For a restart we will keep the same
* socket, no need to do anything. I THINK!!
*/
sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
if (send_int_conf) {
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
(*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
}
return (m);
}
oso = (*inp_p)->sctp_socket;
atomic_add_int(&(*stcb)->asoc.refcnt, 1);
SCTP_TCB_UNLOCK((*stcb));
CURVNET_SET(oso->so_vnet);
so = sonewconn(oso, 0
);
CURVNET_RESTORE();
SCTP_TCB_LOCK((*stcb));
atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
if (so == NULL) {
struct mbuf *op_err;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *pcb_so;
#endif
/* Too many sockets */
SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
sctp_abort_association(*inp_p, NULL, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
pcb_so = SCTP_INP_SO(*inp_p);
atomic_add_int(&(*stcb)->asoc.refcnt, 1);
SCTP_TCB_UNLOCK((*stcb));
SCTP_SOCKET_LOCK(pcb_so, 1);
SCTP_TCB_LOCK((*stcb));
atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(pcb_so, 1);
#endif
return (NULL);
}
inp = (struct sctp_inpcb *)so->so_pcb;
SCTP_INP_INCR_REF(inp);
/*
* We add the unbound flag here so that if we get an
* soabort() before we get the move_pcb done, we
* will properly cleanup.
*/
inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
SCTP_PCB_FLAGS_CONNECTED |
SCTP_PCB_FLAGS_IN_TCPPOOL |
SCTP_PCB_FLAGS_UNBOUND |
(SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
SCTP_PCB_FLAGS_DONT_WAKE);
inp->sctp_features = (*inp_p)->sctp_features;
inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
inp->sctp_socket = so;
inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
inp->max_cwnd = (*inp_p)->max_cwnd;
inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
inp->ecn_supported = (*inp_p)->ecn_supported;
inp->prsctp_supported = (*inp_p)->prsctp_supported;
inp->auth_supported = (*inp_p)->auth_supported;
inp->asconf_supported = (*inp_p)->asconf_supported;
inp->reconfig_supported = (*inp_p)->reconfig_supported;
inp->nrsack_supported = (*inp_p)->nrsack_supported;
inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
inp->sctp_context = (*inp_p)->sctp_context;
inp->local_strreset_support = (*inp_p)->local_strreset_support;
inp->fibnum = (*inp_p)->fibnum;
inp->inp_starting_point_for_iterator = NULL;
/*
* copy in the authentication parameters from the
* original endpoint
*/
if (inp->sctp_ep.local_hmacs)
sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
inp->sctp_ep.local_hmacs =
sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
if (inp->sctp_ep.local_auth_chunks)
sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
inp->sctp_ep.local_auth_chunks =
sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
/*
* Now we must move it from one hash table to
* another and get the tcb in the right place.
*/
/*
* This is where the one-2-one socket is put into
* the accept state waiting for the accept!
*/
if (*stcb) {
(*stcb)->asoc.state |= SCTP_STATE_IN_ACCEPT_QUEUE;
}
sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
atomic_add_int(&(*stcb)->asoc.refcnt, 1);
SCTP_TCB_UNLOCK((*stcb));
sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
0);
SCTP_TCB_LOCK((*stcb));
atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
/*
* now we must check to see if we were aborted while
* the move was going on and the lock/unlock
* happened.
*/
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
/*
* yep it was, we leave the assoc attached
* to the socket since the sctp_inpcb_free()
* call will send an abort for us.
*/
SCTP_INP_DECR_REF(inp);
return (NULL);
}
SCTP_INP_DECR_REF(inp);
/* Switch over to the new guy */
*inp_p = inp;
sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
if (send_int_conf) {
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
(*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
}
/*
* Pull it from the incomplete queue and wake the
* guy
*/
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
atomic_add_int(&(*stcb)->asoc.refcnt, 1);
SCTP_TCB_UNLOCK((*stcb));
SCTP_SOCKET_LOCK(so, 1);
#endif
soisconnected(so);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_TCB_LOCK((*stcb));
atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
SCTP_SOCKET_UNLOCK(so, 1);
#endif
return (m);
}
}
if (notification) {
sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
}
if (send_int_conf) {
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
(*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
}
return (m);
}
static void
sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
struct sctp_tcb *stcb, struct sctp_nets *net)
{
/* cp must not be used, others call this without a c-ack :-) */
struct sctp_association *asoc;
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_cookie_ack: handling COOKIE-ACK\n");
if ((stcb == NULL) || (net == NULL)) {
return;
}
asoc = &stcb->asoc;
sctp_stop_all_cookie_timers(stcb);
/* process according to association state */
if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
/* state change only needed when I am in right state */
SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
sctp_start_net_timers(stcb);
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
stcb->sctp_ep, stcb, asoc->primary_destination);
}
/* update RTO */
SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
if (asoc->overall_error_count == 0) {
net->RTO = sctp_calculate_rto(stcb, asoc, net,
&asoc->time_entered, sctp_align_safe_nocopy,
SCTP_RTT_FROM_NON_DATA);
}
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
soisconnected(stcb->sctp_socket);
}
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
/*
* since we did not send a HB make sure we don't double
* things
*/
net->hb_responded = 1;
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
/*
* We don't need to do the asconf thing, nor hb or
* autoclose if the socket is closed.
*/
goto closed_socket;
}
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
stcb, net);
if (stcb->asoc.sctp_autoclose_ticks &&
sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
stcb->sctp_ep, stcb, NULL);
}
/*
* send ASCONF if parameters are pending and ASCONFs are
* allowed (eg. addresses changed when init/cookie echo were
* in flight)
*/
if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
(stcb->asoc.asconf_supported == 1) &&
(!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
#ifdef SCTP_TIMER_BASED_ASCONF
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
stcb->sctp_ep, stcb,
stcb->asoc.primary_destination);
#else
sctp_send_asconf(stcb, stcb->asoc.primary_destination,
SCTP_ADDR_NOT_LOCKED);
#endif
}
}
closed_socket:
/* Toss the cookie if I can */
sctp_toss_old_cookies(stcb, asoc);
if (!TAILQ_EMPTY(&asoc->sent_queue)) {
/* Restart the timer if we have pending data */
struct sctp_tmit_chunk *chk;
chk = TAILQ_FIRST(&asoc->sent_queue);
sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
}
}
static void
sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
struct sctp_tcb *stcb)
{
struct sctp_nets *net;
struct sctp_tmit_chunk *lchk;
struct sctp_ecne_chunk bkup;
uint8_t override_bit;
uint32_t tsn, window_data_tsn;
int len;
unsigned int pkt_cnt;
len = ntohs(cp->ch.chunk_length);
if ((len != sizeof(struct sctp_ecne_chunk)) &&
(len != sizeof(struct old_sctp_ecne_chunk))) {
return;
}
if (len == sizeof(struct old_sctp_ecne_chunk)) {
/* Its the old format */
memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
bkup.num_pkts_since_cwr = htonl(1);
cp = &bkup;
}
SCTP_STAT_INCR(sctps_recvecne);
tsn = ntohl(cp->tsn);
pkt_cnt = ntohl(cp->num_pkts_since_cwr);
lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
if (lchk == NULL) {
window_data_tsn = stcb->asoc.sending_seq - 1;
} else {
window_data_tsn = lchk->rec.data.TSN_seq;
}
/* Find where it was sent to if possible. */
net = NULL;
TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
if (lchk->rec.data.TSN_seq == tsn) {
net = lchk->whoTo;
net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
break;
}
if (SCTP_TSN_GT(lchk->rec.data.TSN_seq, tsn)) {
break;
}
}
if (net == NULL) {
/*
* What to do. A previous send of a CWR was possibly lost.
* See how old it is, we may have it marked on the actual
* net.
*/
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
if (tsn == net->last_cwr_tsn) {
/* Found him, send it off */
break;
}
}
if (net == NULL) {
/*
* If we reach here, we need to send a special CWR
* that says hey, we did this a long time ago and
* you lost the response.
*/
net = TAILQ_FIRST(&stcb->asoc.nets);
if (net == NULL) {
/* TSNH */
return;
}
override_bit = SCTP_CWR_REDUCE_OVERRIDE;
} else {
override_bit = 0;
}
} else {
override_bit = 0;
}
if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
/*
* JRS - Use the congestion control given in the pluggable
* CC module
*/
stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
/*
* We reduce once every RTT. So we will only lower cwnd at
* the next sending seq i.e. the window_data_tsn
*/
net->cwr_window_tsn = window_data_tsn;
net->ecn_ce_pkt_cnt += pkt_cnt;
net->lost_cnt = pkt_cnt;
net->last_cwr_tsn = tsn;
} else {
override_bit |= SCTP_CWR_IN_SAME_WINDOW;
if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
/*
* Another loss in the same window update how many
* marks/packets lost we have had.
*/
int cnt = 1;
if (pkt_cnt > net->lost_cnt) {
/* Should be the case */
cnt = (pkt_cnt - net->lost_cnt);
net->ecn_ce_pkt_cnt += cnt;
}
net->lost_cnt = pkt_cnt;
net->last_cwr_tsn = tsn;
/*
* Most CC functions will ignore this call, since we
* are in-window yet of the initial CE the peer saw.
*/
stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
}
}
/*
* We always send a CWR this way if our previous one was lost our
* peer will get an update, or if it is not time again to reduce we
* still get the cwr to the peer. Note we set the override when we
* could not find the TSN on the chunk or the destination network.
*/
sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
}
static void
sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
{
/*
* Here we get a CWR from the peer. We must look in the outqueue and
* make sure that we have a covered ECNE in the control chunk part.
* If so remove it.
*/
struct sctp_tmit_chunk *chk;
struct sctp_ecne_chunk *ecne;
int override;
uint32_t cwr_tsn;
cwr_tsn = ntohl(cp->tsn);
override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
continue;
}
if ((override == 0) && (chk->whoTo != net)) {
/* Must be from the right src unless override is set */
continue;
}
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
/* this covers this ECNE, we can remove it */
stcb->asoc.ecn_echo_cnt_onq--;
TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
sctp_next);
sctp_m_freem(chk->data);
chk->data = NULL;
stcb->asoc.ctrl_queue_cnt--;
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
if (override == 0) {
break;
}
}
}
}
static void
sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
struct sctp_tcb *stcb, struct sctp_nets *net)
{
struct sctp_association *asoc;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
if (stcb == NULL)
return;
asoc = &stcb->asoc;
/* process according to association state */
if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
/* unexpected SHUTDOWN-COMPLETE... so ignore... */
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
SCTP_TCB_UNLOCK(stcb);
return;
}
/* notify upper layer protocol */
if (stcb->sctp_socket) {
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
}
#ifdef INVARIANTS
if (!TAILQ_EMPTY(&asoc->send_queue) ||
!TAILQ_EMPTY(&asoc->sent_queue) ||
!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
}
#endif
/* stop the timer */
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
/* free the TCB */
SCTPDBG(SCTP_DEBUG_INPUT2,
"sctp_handle_shutdown_complete: calls free-asoc\n");
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
return;
}
static int
process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
struct sctp_nets *net, uint8_t flg)
{
switch (desc->chunk_type) {
case SCTP_DATA:
/* find the tsn to resend (possibly */
{
uint32_t tsn;
struct sctp_tmit_chunk *tp1;
tsn = ntohl(desc->tsn_ifany);
TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
if (tp1->rec.data.TSN_seq == tsn) {
/* found it */
break;
}
if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, tsn)) {
/* not found */
tp1 = NULL;
break;
}
}
if (tp1 == NULL) {
/*
* Do it the other way , aka without paying
* attention to queue seq order.
*/
SCTP_STAT_INCR(sctps_pdrpdnfnd);
TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
if (tp1->rec.data.TSN_seq == tsn) {
/* found it */
break;
}
}
}
if (tp1 == NULL) {
SCTP_STAT_INCR(sctps_pdrptsnnf);
}
if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
uint8_t *ddp;
if (((flg & SCTP_BADCRC) == 0) &&
((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
return (0);
}
if ((stcb->asoc.peers_rwnd == 0) &&
((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
SCTP_STAT_INCR(sctps_pdrpdiwnp);
return (0);
}
if (stcb->asoc.peers_rwnd == 0 &&
(flg & SCTP_FROM_MIDDLE_BOX)) {
SCTP_STAT_INCR(sctps_pdrpdizrw);
return (0);
}
ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+
sizeof(struct sctp_data_chunk));
{
unsigned int iii;
for (iii = 0; iii < sizeof(desc->data_bytes);
iii++) {
if (ddp[iii] != desc->data_bytes[iii]) {
SCTP_STAT_INCR(sctps_pdrpbadd);
return (-1);
}
}
}
if (tp1->do_rtt) {
/*
* this guy had a RTO calculation
* pending on it, cancel it
*/
if (tp1->whoTo->rto_needed == 0) {
tp1->whoTo->rto_needed = 1;
}
tp1->do_rtt = 0;
}
SCTP_STAT_INCR(sctps_pdrpmark);
if (tp1->sent != SCTP_DATAGRAM_RESEND)
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
/*
* mark it as if we were doing a FR, since
* we will be getting gap ack reports behind
* the info from the router.
*/
tp1->rec.data.doing_fast_retransmit = 1;
/*
* mark the tsn with what sequences can
* cause a new FR.
*/
if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
} else {
tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
}
/* restart the timer */
sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
stcb, tp1->whoTo,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
stcb, tp1->whoTo);
/* fix counts and things */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
tp1->whoTo->flight_size,
tp1->book_size,
(uintptr_t) stcb,
tp1->rec.data.TSN_seq);
}
if (tp1->sent < SCTP_DATAGRAM_RESEND) {
sctp_flight_size_decrease(tp1);
sctp_total_flight_decrease(stcb, tp1);
}
tp1->sent = SCTP_DATAGRAM_RESEND;
} {
/* audit code */
unsigned int audit;
audit = 0;
TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
if (tp1->sent == SCTP_DATAGRAM_RESEND)
audit++;
}
TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
sctp_next) {
if (tp1->sent == SCTP_DATAGRAM_RESEND)
audit++;
}
if (audit != stcb->asoc.sent_queue_retran_cnt) {
SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
audit, stcb->asoc.sent_queue_retran_cnt);
#ifndef SCTP_AUDITING_ENABLED
stcb->asoc.sent_queue_retran_cnt = audit;
#endif
}
}
}
break;
case SCTP_ASCONF:
{
struct sctp_tmit_chunk *asconf;
TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
sctp_next) {
if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
break;
}
}
if (asconf) {
if (asconf->sent != SCTP_DATAGRAM_RESEND)
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
asconf->sent = SCTP_DATAGRAM_RESEND;
asconf->snd_count--;
}
}
break;
case SCTP_INITIATION:
/* resend the INIT */
stcb->asoc.dropped_special_cnt++;
if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
/*
* If we can get it in, in a few attempts we do
* this, otherwise we let the timer fire.
*/
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
stcb, net,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
}
break;
case SCTP_SELECTIVE_ACK:
case SCTP_NR_SELECTIVE_ACK:
/* resend the sack */
sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
break;
case SCTP_HEARTBEAT_REQUEST:
/* resend a demand HB */
if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
/*
* Only retransmit if we KNOW we wont destroy the
* tcb
*/
sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
}
break;
case SCTP_SHUTDOWN:
sctp_send_shutdown(stcb, net);
break;
case SCTP_SHUTDOWN_ACK:
sctp_send_shutdown_ack(stcb, net);
break;
case SCTP_COOKIE_ECHO:
{
struct sctp_tmit_chunk *cookie;
cookie = NULL;
TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
sctp_next) {
if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
break;
}
}
if (cookie) {
if (cookie->sent != SCTP_DATAGRAM_RESEND)
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
cookie->sent = SCTP_DATAGRAM_RESEND;
sctp_stop_all_cookie_timers(stcb);
}
}
break;
case SCTP_COOKIE_ACK:
sctp_send_cookie_ack(stcb);
break;
case SCTP_ASCONF_ACK:
/* resend last asconf ack */
sctp_send_asconf_ack(stcb);
break;
case SCTP_FORWARD_CUM_TSN:
send_forward_tsn(stcb, &stcb->asoc);
break;
/* can't do anything with these */
case SCTP_PACKET_DROPPED:
case SCTP_INITIATION_ACK: /* this should not happen */
case SCTP_HEARTBEAT_ACK:
case SCTP_ABORT_ASSOCIATION:
case SCTP_OPERATION_ERROR:
case SCTP_SHUTDOWN_COMPLETE:
case SCTP_ECN_ECHO:
case SCTP_ECN_CWR:
default:
break;
}
return (0);
}
void
sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
{
uint32_t i;
uint16_t temp;
/*
* We set things to 0xffff since this is the last delivered sequence
* and we will be sending in 0 after the reset.
*/
if (number_entries) {
for (i = 0; i < number_entries; i++) {
temp = ntohs(list[i]);
if (temp >= stcb->asoc.streamincnt) {
continue;
}
stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff;
}
} else {
list = NULL;
for (i = 0; i < stcb->asoc.streamincnt; i++) {
stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
}
}
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
}
static void
sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
{
uint32_t i;
uint16_t temp;
if (number_entries > 0) {
for (i = 0; i < number_entries; i++) {
temp = ntohs(list[i]);
if (temp >= stcb->asoc.streamoutcnt) {
/* no such stream */
continue;
}
stcb->asoc.strmout[temp].next_sequence_send = 0;
}
} else {
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
stcb->asoc.strmout[i].next_sequence_send = 0;
}
}
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
}
static void
sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
{
uint32_t i;
uint16_t temp;
if (number_entries > 0) {
for (i = 0; i < number_entries; i++) {
temp = ntohs(list[i]);
if (temp >= stcb->asoc.streamoutcnt) {
/* no such stream */
continue;
}
stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
}
} else {
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
}
}
}
struct sctp_stream_reset_request *
sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
{
struct sctp_association *asoc;
struct sctp_chunkhdr *ch;
struct sctp_stream_reset_request *r;
struct sctp_tmit_chunk *chk;
int len, clen;
asoc = &stcb->asoc;
if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
asoc->stream_reset_outstanding = 0;
return (NULL);
}
if (stcb->asoc.str_reset == NULL) {
asoc->stream_reset_outstanding = 0;
return (NULL);
}
chk = stcb->asoc.str_reset;
if (chk->data == NULL) {
return (NULL);
}
if (bchk) {
/* he wants a copy of the chk pointer */
*bchk = chk;
}
clen = chk->send_size;
ch = mtod(chk->data, struct sctp_chunkhdr *);
r = (struct sctp_stream_reset_request *)(ch + 1);
if (ntohl(r->request_seq) == seq) {
/* found it */
return (r);
}
len = SCTP_SIZE32(ntohs(r->ph.param_length));
if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
/* move to the next one, there can only be a max of two */
r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
if (ntohl(r->request_seq) == seq) {
return (r);
}
}
/* that seq is not here */
return (NULL);
}
static void
sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk = stcb->asoc.str_reset;
if (stcb->asoc.str_reset == NULL) {
return;
}
asoc = &stcb->asoc;
sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
TAILQ_REMOVE(&asoc->control_send_queue,
chk,
sctp_next);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
asoc->ctrl_queue_cnt--;
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
/* sa_ignore NO_NULL_CHK */
stcb->asoc.str_reset = NULL;
}
static int
sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
uint32_t seq, uint32_t action,
struct sctp_stream_reset_response *respin)
{
uint16_t type;
int lparm_len;
struct sctp_association *asoc = &stcb->asoc;
struct sctp_tmit_chunk *chk;
struct sctp_stream_reset_request *req_param;
struct sctp_stream_reset_out_request *req_out_param;
struct sctp_stream_reset_in_request *req_in_param;
uint32_t number_entries;
if (asoc->stream_reset_outstanding == 0) {
/* duplicate */
return (0);
}
if (seq == stcb->asoc.str_reset_seq_out) {
req_param = sctp_find_stream_reset(stcb, seq, &chk);
if (req_param != NULL) {
stcb->asoc.str_reset_seq_out++;
type = ntohs(req_param->ph.param_type);
lparm_len = ntohs(req_param->ph.param_length);
if (type == SCTP_STR_RESET_OUT_REQUEST) {
int no_clear = 0;
req_out_param = (struct sctp_stream_reset_out_request *)req_param;
number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
asoc->stream_reset_out_is_outstanding = 0;
if (asoc->stream_reset_outstanding)
asoc->stream_reset_outstanding--;
if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
/* do it */
sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
} else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
} else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
/*
* Set it up so we don't stop
* retransmitting
*/
asoc->stream_reset_outstanding++;
stcb->asoc.str_reset_seq_out--;
asoc->stream_reset_out_is_outstanding = 1;
no_clear = 1;
} else {
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
}
if (no_clear == 0) {
sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
}
} else if (type == SCTP_STR_RESET_IN_REQUEST) {
req_in_param = (struct sctp_stream_reset_in_request *)req_param;
number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
if (asoc->stream_reset_outstanding)
asoc->stream_reset_outstanding--;
if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
} else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
}
} else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
/* Ok we now may have more streams */
int num_stream;
num_stream = stcb->asoc.strm_pending_add_size;
if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
/* TSNH */
num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
}
stcb->asoc.strm_pending_add_size = 0;
if (asoc->stream_reset_outstanding)
asoc->stream_reset_outstanding--;
if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
/* Put the new streams into effect */
int i;
for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
asoc->strmout[i].state = SCTP_STREAM_OPEN;
}
asoc->streamoutcnt += num_stream;
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
} else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
SCTP_STREAM_CHANGE_DENIED);
} else {
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
SCTP_STREAM_CHANGE_FAILED);
}
} else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
if (asoc->stream_reset_outstanding)
asoc->stream_reset_outstanding--;
if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
SCTP_STREAM_CHANGE_DENIED);
} else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
SCTP_STREAM_CHANGE_FAILED);
}
} else if (type == SCTP_STR_RESET_TSN_REQUEST) {
/**
* a) Adopt the new in tsn.
* b) reset the map
* c) Adopt the new out-tsn
*/
struct sctp_stream_reset_response_tsn *resp;
struct sctp_forward_tsn_chunk fwdtsn;
int abort_flag = 0;
if (respin == NULL) {
/* huh ? */
return (0);
}
if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
return (0);
}
if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
resp = (struct sctp_stream_reset_response_tsn *)respin;
asoc->stream_reset_outstanding--;
fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
if (abort_flag) {
return (1);
}
stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
}
stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
} else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
SCTP_ASSOC_RESET_DENIED);
} else {
sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
SCTP_ASSOC_RESET_FAILED);
}
}
/* get rid of the request and get the request flags */
if (asoc->stream_reset_outstanding == 0) {
sctp_clean_up_stream_reset(stcb);
}
}
}
if (asoc->stream_reset_outstanding == 0) {
sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
}
return (0);
}
static void
sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
struct sctp_tmit_chunk *chk,
struct sctp_stream_reset_in_request *req, int trunc)
{
uint32_t seq;
int len, i;
int number_entries;
uint16_t temp;
/*
* peer wants me to send a str-reset to him for my outgoing seq's if
* seq_in is right.
*/
struct sctp_association *asoc = &stcb->asoc;
seq = ntohl(req->request_seq);
if (asoc->str_reset_seq_in == seq) {
asoc->last_reset_action[1] = asoc->last_reset_action[0];
if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
} else if (trunc) {
/* Can't do it, since they exceeded our buffer size */
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
} else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
len = ntohs(req->ph.param_length);
number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
if (number_entries) {
for (i = 0; i < number_entries; i++) {
temp = ntohs(req->list_of_streams[i]);
if (temp >= stcb->asoc.streamoutcnt) {
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
goto bad_boy;
}
req->list_of_streams[i] = temp;
}
for (i = 0; i < number_entries; i++) {
if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
}
}
} else {
/* Its all */
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
}
}
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
} else {
/* Can't do it, since we have sent one out */
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
}
bad_boy:
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
asoc->str_reset_seq_in++;
} else if (asoc->str_reset_seq_in - 1 == seq) {
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
} else if (asoc->str_reset_seq_in - 2 == seq) {
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
} else {
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
}
sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
}
static int
sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
struct sctp_tmit_chunk *chk,
struct sctp_stream_reset_tsn_request *req)
{
/* reset all in and out and update the tsn */
/*
* A) reset my str-seq's on in and out. B) Select a receive next,
* and set cum-ack to it. Also process this selected number as a
* fwd-tsn as well. C) set in the response my next sending seq.
*/
struct sctp_forward_tsn_chunk fwdtsn;
struct sctp_association *asoc = &stcb->asoc;
int abort_flag = 0;
uint32_t seq;
seq = ntohl(req->request_seq);
if (asoc->str_reset_seq_in == seq) {
asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
} else {
fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
fwdtsn.ch.chunk_flags = 0;
fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
if (abort_flag) {
return (1);
}
asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
}
asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
memset(asoc->mapping_array, 0, asoc->mapping_array_size);
asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
atomic_add_int(&asoc->sending_seq, 1);
/* save off historical data for retrans */
asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
asoc->last_sending_seq[0] = asoc->sending_seq;
asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
}
sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
asoc->str_reset_seq_in++;
} else if (asoc->str_reset_seq_in - 1 == seq) {
sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
} else if (asoc->str_reset_seq_in - 2 == seq) {
sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
} else {
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
}
return (0);
}
static void
sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
struct sctp_tmit_chunk *chk,
struct sctp_stream_reset_out_request *req, int trunc)
{
uint32_t seq, tsn;
int number_entries, len;
struct sctp_association *asoc = &stcb->asoc;
seq = ntohl(req->request_seq);
/* now if its not a duplicate we process it */
if (asoc->str_reset_seq_in == seq) {
len = ntohs(req->ph.param_length);
number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
/*
* the sender is resetting, handle the list issue.. we must
* a) verify if we can do the reset, if so no problem b) If
* we can't do the reset we must copy the request. c) queue
* it, and setup the data in processor to trigger it off
* when needed and dequeue all the queued data.
*/
tsn = ntohl(req->send_reset_at_tsn);
/* move the reset action back one */
asoc->last_reset_action[1] = asoc->last_reset_action[0];
if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
} else if (trunc) {
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
} else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
/* we can do it now */
sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
} else {
/*
* we must queue it up and thus wait for the TSN's
* to arrive that are at or before tsn
*/
struct sctp_stream_reset_list *liste;
int siz;
siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
siz, SCTP_M_STRESET);
if (liste == NULL) {
/* gak out of memory */
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
return;
}
liste->seq = seq;
liste->tsn = tsn;
liste->number_entries = number_entries;
memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
}
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
asoc->str_reset_seq_in++;
} else if ((asoc->str_reset_seq_in - 1) == seq) {
/*
* one seq back, just echo back last action since my
* response was lost.
*/
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
} else if ((asoc->str_reset_seq_in - 2) == seq) {
/*
* two seq back, just echo back last action since my
* response was lost.
*/
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
} else {
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
}
}
static void
sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
struct sctp_stream_reset_add_strm *str_add)
{
/*
* Peer is requesting to add more streams. If its within our
* max-streams we will allow it.
*/
uint32_t num_stream, i;
uint32_t seq;
struct sctp_association *asoc = &stcb->asoc;
struct sctp_queued_to_read *ctl, *nctl;
/* Get the number. */
seq = ntohl(str_add->request_seq);
num_stream = ntohs(str_add->number_of_streams);
/* Now what would be the new total? */
if (asoc->str_reset_seq_in == seq) {
num_stream += stcb->asoc.streamincnt;
stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
} else if ((num_stream > stcb->asoc.max_inbound_streams) ||
(num_stream > 0xffff)) {
/* We must reject it they ask for to many */
denied:
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
} else {
/* Ok, we can do that :-) */
struct sctp_stream_in *oldstrm;
/* save off the old */
oldstrm = stcb->asoc.strmin;
SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
(num_stream * sizeof(struct sctp_stream_in)),
SCTP_M_STRMI);
if (stcb->asoc.strmin == NULL) {
stcb->asoc.strmin = oldstrm;
goto denied;
}
/* copy off the old data */
for (i = 0; i < stcb->asoc.streamincnt; i++) {
TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
stcb->asoc.strmin[i].stream_no = i;
stcb->asoc.strmin[i].last_sequence_delivered = oldstrm[i].last_sequence_delivered;
stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
/* now anything on those queues? */
TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next, nctl) {
TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next);
TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next);
}
}
/* Init the new streams */
for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
stcb->asoc.strmin[i].stream_no = i;
stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
stcb->asoc.strmin[i].delivery_started = 0;
}
SCTP_FREE(oldstrm, SCTP_M_STRMI);
/* update the size */
stcb->asoc.streamincnt = num_stream;
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
}
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
asoc->str_reset_seq_in++;
} else if ((asoc->str_reset_seq_in - 1) == seq) {
/*
* one seq back, just echo back last action since my
* response was lost.
*/
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
} else if ((asoc->str_reset_seq_in - 2) == seq) {
/*
* two seq back, just echo back last action since my
* response was lost.
*/
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
} else {
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
}
}
static void
sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
struct sctp_stream_reset_add_strm *str_add)
{
/*
* Peer is requesting to add more streams. If its within our
* max-streams we will allow it.
*/
uint16_t num_stream;
uint32_t seq;
struct sctp_association *asoc = &stcb->asoc;
/* Get the number. */
seq = ntohl(str_add->request_seq);
num_stream = ntohs(str_add->number_of_streams);
/* Now what would be the new total? */
if (asoc->str_reset_seq_in == seq) {
stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
} else if (stcb->asoc.stream_reset_outstanding) {
/* We must reject it we have something pending */
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
} else {
/* Ok, we can do that :-) */
int mychk;
mychk = stcb->asoc.streamoutcnt;
mychk += num_stream;
if (mychk < 0x10000) {
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
}
} else {
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
}
}
sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
asoc->str_reset_seq_in++;
} else if ((asoc->str_reset_seq_in - 1) == seq) {
/*
* one seq back, just echo back last action since my
* response was lost.
*/
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
} else if ((asoc->str_reset_seq_in - 2) == seq) {
/*
* two seq back, just echo back last action since my
* response was lost.
*/
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
} else {
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
}
}
#ifdef __GNUC__
__attribute__((noinline))
#endif
static int
sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
struct sctp_chunkhdr *ch_req)
{
uint16_t remaining_length, param_len, ptype;
struct sctp_paramhdr pstore;
uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
uint32_t seq = 0;
int num_req = 0;
int trunc = 0;
struct sctp_tmit_chunk *chk;
struct sctp_chunkhdr *ch;
struct sctp_paramhdr *ph;
int ret_code = 0;
int num_param = 0;
/* now it may be a reset or a reset-response */
remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
/* setup for adding the response */
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return (ret_code);
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->no_fr_allowed = 0;
chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
chk->book_size_scale = 0;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
strres_nochunk:
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return (ret_code);
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
/* setup chunk parameters */
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->whoTo = NULL;
ch = mtod(chk->data, struct sctp_chunkhdr *);
ch->chunk_type = SCTP_STREAM_RESET;
ch->chunk_flags = 0;
ch->chunk_length = htons(chk->send_size);
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
offset += sizeof(struct sctp_chunkhdr);
while (remaining_length >= sizeof(struct sctp_paramhdr)) {
ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *) & pstore);
if (ph == NULL) {
/* TSNH */
break;
}
param_len = ntohs(ph->param_length);
if ((param_len > remaining_length) ||
(param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
/* bad parameter length */
break;
}
ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
(uint8_t *) & cstore);
if (ph == NULL) {
/* TSNH */
break;
}
ptype = ntohs(ph->param_type);
num_param++;
if (param_len > sizeof(cstore)) {
trunc = 1;
} else {
trunc = 0;
}
if (num_param > SCTP_MAX_RESET_PARAMS) {
/* hit the max of parameters already sorry.. */
break;
}
if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
struct sctp_stream_reset_out_request *req_out;
if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
break;
}
req_out = (struct sctp_stream_reset_out_request *)ph;
num_req++;
if (stcb->asoc.stream_reset_outstanding) {
seq = ntohl(req_out->response_seq);
if (seq == stcb->asoc.str_reset_seq_out) {
/* implicit ack */
(void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
}
}
sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
} else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
struct sctp_stream_reset_add_strm *str_add;
if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
break;
}
str_add = (struct sctp_stream_reset_add_strm *)ph;
num_req++;
sctp_handle_str_reset_add_strm(stcb, chk, str_add);
} else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
struct sctp_stream_reset_add_strm *str_add;
if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
break;
}
str_add = (struct sctp_stream_reset_add_strm *)ph;
num_req++;
sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
} else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
struct sctp_stream_reset_in_request *req_in;
num_req++;
req_in = (struct sctp_stream_reset_in_request *)ph;
sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
} else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
struct sctp_stream_reset_tsn_request *req_tsn;
num_req++;
req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
ret_code = 1;
goto strres_nochunk;
}
/* no more */
break;
} else if (ptype == SCTP_STR_RESET_RESPONSE) {
struct sctp_stream_reset_response *resp;
uint32_t result;
if (param_len < sizeof(struct sctp_stream_reset_response)) {
break;
}
resp = (struct sctp_stream_reset_response *)ph;
seq = ntohl(resp->response_seq);
result = ntohl(resp->result);
if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
ret_code = 1;
goto strres_nochunk;
}
} else {
break;
}
offset += SCTP_SIZE32(param_len);
if (remaining_length >= SCTP_SIZE32(param_len)) {
remaining_length -= SCTP_SIZE32(param_len);
} else {
remaining_length = 0;
}
}
if (num_req == 0) {
/* we have no response free the stuff */
goto strres_nochunk;
}
/* ok we have a chunk to link in */
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
chk,
sctp_next);
stcb->asoc.ctrl_queue_cnt++;
return (ret_code);
}
/*
* Handle a router or endpoints report of a packet loss, there are two ways
* to handle this, either we get the whole packet and must disect it
* ourselves (possibly with truncation and or corruption) or it is a summary
* from a middle box that did the disectting for us.
*/
static void
sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
{
uint32_t bottle_bw, on_queue;
uint16_t trunc_len;
unsigned int chlen;
unsigned int at;
struct sctp_chunk_desc desc;
struct sctp_chunkhdr *ch;
chlen = ntohs(cp->ch.chunk_length);
chlen -= sizeof(struct sctp_pktdrop_chunk);
/* XXX possible chlen underflow */
if (chlen == 0) {
ch = NULL;
if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
SCTP_STAT_INCR(sctps_pdrpbwrpt);
} else {
ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
chlen -= sizeof(struct sctphdr);
/* XXX possible chlen underflow */
memset(&desc, 0, sizeof(desc));
}
trunc_len = (uint16_t) ntohs(cp->trunc_len);
if (trunc_len > limit) {
trunc_len = limit;
}
/* now the chunks themselves */
while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
desc.chunk_type = ch->chunk_type;
/* get amount we need to move */
at = ntohs(ch->chunk_length);
if (at < sizeof(struct sctp_chunkhdr)) {
/* corrupt chunk, maybe at the end? */
SCTP_STAT_INCR(sctps_pdrpcrupt);
break;
}
if (trunc_len == 0) {
/* we are supposed to have all of it */
if (at > chlen) {
/* corrupt skip it */
SCTP_STAT_INCR(sctps_pdrpcrupt);
break;
}
} else {
/* is there enough of it left ? */
if (desc.chunk_type == SCTP_DATA) {
if (chlen < (sizeof(struct sctp_data_chunk) +
sizeof(desc.data_bytes))) {
break;
}
} else {
if (chlen < sizeof(struct sctp_chunkhdr)) {
break;
}
}
}
if (desc.chunk_type == SCTP_DATA) {
/* can we get out the tsn? */
if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
SCTP_STAT_INCR(sctps_pdrpmbda);
if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
/* yep */
struct sctp_data_chunk *dcp;
uint8_t *ddp;
unsigned int iii;
dcp = (struct sctp_data_chunk *)ch;
ddp = (uint8_t *) (dcp + 1);
for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
desc.data_bytes[iii] = ddp[iii];
}
desc.tsn_ifany = dcp->dp.tsn;
} else {
/* nope we are done. */
SCTP_STAT_INCR(sctps_pdrpnedat);
break;
}
} else {
if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
SCTP_STAT_INCR(sctps_pdrpmbct);
}
if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
SCTP_STAT_INCR(sctps_pdrppdbrk);
break;
}
if (SCTP_SIZE32(at) > chlen) {
break;
}
chlen -= SCTP_SIZE32(at);
if (chlen < sizeof(struct sctp_chunkhdr)) {
/* done, none left */
break;
}
ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
}
/* Now update any rwnd --- possibly */
if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
/* From a peer, we get a rwnd report */
uint32_t a_rwnd;
SCTP_STAT_INCR(sctps_pdrpfehos);
bottle_bw = ntohl(cp->bottle_bw);
on_queue = ntohl(cp->current_onq);
if (bottle_bw && on_queue) {
/* a rwnd report is in here */
if (bottle_bw > on_queue)
a_rwnd = bottle_bw - on_queue;
else
a_rwnd = 0;
if (a_rwnd == 0)
stcb->asoc.peers_rwnd = 0;
else {
if (a_rwnd > stcb->asoc.total_flight) {
stcb->asoc.peers_rwnd =
a_rwnd - stcb->asoc.total_flight;
} else {
stcb->asoc.peers_rwnd = 0;
}
if (stcb->asoc.peers_rwnd <
stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
/* SWS sender side engages */
stcb->asoc.peers_rwnd = 0;
}
}
}
} else {
SCTP_STAT_INCR(sctps_pdrpfmbox);
}
/* now middle boxes in sat networks get a cwnd bump */
if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
(stcb->asoc.sat_t3_loss_recovery == 0) &&
(stcb->asoc.sat_network)) {
/*
* This is debateable but for sat networks it makes sense
* Note if a T3 timer has went off, we will prohibit any
* changes to cwnd until we exit the t3 loss recovery.
*/
stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
net, cp, &bottle_bw, &on_queue);
}
}
/*
* handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
* still contain IP/SCTP header - stcb: is the tcb found for this packet -
* offset: offset into the mbuf chain to first chunkhdr - length: is the
* length of the complete packet outputs: - length: modified to remaining
* length after control processing - netp: modified to new sctp_nets after
* cookie-echo processing - return NULL to discard the packet (ie. no asoc,
* bad packet,...) otherwise return the tcb for this packet
*/
#ifdef __GNUC__
__attribute__((noinline))
#endif
static struct sctp_tcb *
sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
struct sctp_association *asoc;
struct mbuf *op_err;
char msg[SCTP_DIAG_INFO_LEN];
uint32_t vtag_in;
int num_chunks = 0; /* number of control chunks processed */
uint32_t chk_length;
int ret;
int abort_no_unlock = 0;
int ecne_seen = 0;
/*
* How big should this be, and should it be alloc'd? Lets try the
* d-mtu-ceiling for now (2k) and that should hopefully work ...
* until we get into jumbo grams and such..
*/
uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
struct sctp_tcb *locked_tcb = stcb;
int got_auth = 0;
uint32_t auth_offset = 0, auth_len = 0;
int auth_skipped = 0;
int asconf_cnt = 0;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
iphlen, *offset, length, (void *)stcb);
/* validate chunk header length... */
if (ntohs(ch->chunk_length) < sizeof(*ch)) {
SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
ntohs(ch->chunk_length));
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
/*
* validate the verification tag
*/
vtag_in = ntohl(sh->v_tag);
if (locked_tcb) {
SCTP_TCB_LOCK_ASSERT(locked_tcb);
}
if (ch->chunk_type == SCTP_INITIATION) {
SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
ntohs(ch->chunk_length), vtag_in);
if (vtag_in != 0) {
/* protocol error- silently discard... */
SCTP_STAT_INCR(sctps_badvtag);
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
} else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
/*
* If there is no stcb, skip the AUTH chunk and process
* later after a stcb is found (to validate the lookup was
* valid.
*/
if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
(stcb == NULL) &&
(inp->auth_supported == 1)) {
/* save this chunk for later processing */
auth_skipped = 1;
auth_offset = *offset;
auth_len = ntohs(ch->chunk_length);
/* (temporarily) move past this chunk */
*offset += SCTP_SIZE32(auth_len);
if (*offset >= length) {
/* no more data left in the mbuf chain */
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
sizeof(struct sctp_chunkhdr), chunk_buf);
}
if (ch == NULL) {
/* Help */
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
if (ch->chunk_type == SCTP_COOKIE_ECHO) {
goto process_control_chunks;
}
/*
* first check if it's an ASCONF with an unknown src addr we
* need to look inside to find the association
*/
if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
struct sctp_chunkhdr *asconf_ch = ch;
uint32_t asconf_offset = 0, asconf_len = 0;
/* inp's refcount may be reduced */
SCTP_INP_INCR_REF(inp);
asconf_offset = *offset;
do {
asconf_len = ntohs(asconf_ch->chunk_length);
if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
break;
stcb = sctp_findassociation_ep_asconf(m,
*offset,
dst,
sh, &inp, netp, vrf_id);
if (stcb != NULL)
break;
asconf_offset += SCTP_SIZE32(asconf_len);
asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
sizeof(struct sctp_chunkhdr), chunk_buf);
} while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
if (stcb == NULL) {
/*
* reduce inp's refcount if not reduced in
* sctp_findassociation_ep_asconf().
*/
SCTP_INP_DECR_REF(inp);
} else {
locked_tcb = stcb;
}
/* now go back and verify any auth chunk to be sure */
if (auth_skipped && (stcb != NULL)) {
struct sctp_auth_chunk *auth;
auth = (struct sctp_auth_chunk *)
sctp_m_getptr(m, auth_offset,
auth_len, chunk_buf);
got_auth = 1;
auth_skipped = 0;
if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
auth_offset)) {
/* auth HMAC failed so dump it */
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
} else {
/* remaining chunks are HMAC checked */
stcb->asoc.authenticated = 1;
}
}
}
if (stcb == NULL) {
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
/* no association, so it's out of the blue... */
sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
asoc = &stcb->asoc;
/* ABORT and SHUTDOWN can use either v_tag... */
if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
(ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
(ch->chunk_type == SCTP_PACKET_DROPPED)) {
/* Take the T-bit always into account. */
if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
(vtag_in == asoc->my_vtag)) ||
(((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
(vtag_in == asoc->peer_vtag))) {
/* this is valid */
} else {
/* drop this packet... */
SCTP_STAT_INCR(sctps_badvtag);
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
} else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
if (vtag_in != asoc->my_vtag) {
/*
* this could be a stale SHUTDOWN-ACK or the
* peer never got the SHUTDOWN-COMPLETE and
* is still hung; we have started a new asoc
* but it won't complete until the shutdown
* is completed
*/
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
sctp_handle_ootb(m, iphlen, *offset, src, dst,
sh, inp, op_err,
mflowtype, mflowid, fibnum,
vrf_id, port);
return (NULL);
}
} else {
/* for all other chunks, vtag must match */
if (vtag_in != asoc->my_vtag) {
/* invalid vtag... */
SCTPDBG(SCTP_DEBUG_INPUT3,
"invalid vtag: %xh, expect %xh\n",
vtag_in, asoc->my_vtag);
SCTP_STAT_INCR(sctps_badvtag);
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
}
} /* end if !SCTP_COOKIE_ECHO */
/*
* process all control chunks...
*/
if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
(ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
(ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
/* implied cookie-ack.. we must have lost the ack */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
*netp);
}
process_control_chunks:
while (IS_SCTP_CONTROL(ch)) {
/* validate chunk length */
chk_length = ntohs(ch->chunk_length);
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
ch->chunk_type, chk_length);
SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
if (chk_length < sizeof(*ch) ||
(*offset + (int)chk_length) > length) {
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
/*
* INIT-ACK only gets the init ack "header" portion only
* because we don't have to process the peer's COOKIE. All
* others get a complete chunk.
*/
if ((ch->chunk_type == SCTP_INITIATION_ACK) ||
(ch->chunk_type == SCTP_INITIATION)) {
/* get an init-ack chunk */
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
sizeof(struct sctp_init_ack_chunk), chunk_buf);
if (ch == NULL) {
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
} else {
/* For cookies and all other chunks. */
if (chk_length > sizeof(chunk_buf)) {
/*
* use just the size of the chunk buffer so
* the front part of our chunks fit in
* contiguous space up to the chunk buffer
* size (508 bytes). For chunks that need to
* get more than that they must use the
* sctp_m_getptr() function or other means
* (e.g. know how to parse mbuf chains).
* Cookies do this already.
*/
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
(sizeof(chunk_buf) - 4),
chunk_buf);
if (ch == NULL) {
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
} else {
/* We can fit it all */
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
chk_length, chunk_buf);
if (ch == NULL) {
SCTP_PRINTF("sctp_process_control: Can't get the all data....\n");
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
}
}
num_chunks++;
/* Save off the last place we got a control from */
if (stcb != NULL) {
if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
/*
* allow last_control to be NULL if
* ASCONF... ASCONF processing will find the
* right net later
*/
if ((netp != NULL) && (*netp != NULL))
stcb->asoc.last_control_chunk_from = *netp;
}
}
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xB0, ch->chunk_type);
#endif
/* check to see if this chunk required auth, but isn't */
if ((stcb != NULL) &&
(stcb->asoc.auth_supported == 1) &&
sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
!stcb->asoc.authenticated) {
/* "silently" ignore */
SCTP_STAT_INCR(sctps_recvauthmissing);
goto next_chunk;
}
switch (ch->chunk_type) {
case SCTP_INITIATION:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
/* The INIT chunk must be the only chunk. */
if ((num_chunks > 1) ||
(length - *offset > (int)SCTP_SIZE32(chk_length))) {
/* RFC 4960 requires that no ABORT is sent */
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
/* Honor our resource limit. */
if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
sctp_abort_association(inp, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
*offset = length;
return (NULL);
}
sctp_handle_init(m, iphlen, *offset, src, dst, sh,
(struct sctp_init_chunk *)ch, inp,
stcb, &abort_no_unlock,
mflowtype, mflowid,
vrf_id, port);
*offset = length;
if ((!abort_no_unlock) && (locked_tcb)) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
break;
case SCTP_PAD_CHUNK:
break;
case SCTP_INITIATION_ACK:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT-ACK\n");
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
/* We are not interested anymore */
if ((stcb) && (stcb->asoc.total_output_queue_size)) {
;
} else {
if (locked_tcb != stcb) {
/* Very unlikely */
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
if (stcb) {
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(inp);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
return (NULL);
}
}
/* The INIT-ACK chunk must be the only chunk. */
if ((num_chunks > 1) ||
(length - *offset > (int)SCTP_SIZE32(chk_length))) {
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
if ((netp) && (*netp)) {
ret = sctp_handle_init_ack(m, iphlen, *offset,
src, dst, sh,
(struct sctp_init_ack_chunk *)ch,
stcb, *netp,
&abort_no_unlock,
mflowtype, mflowid,
vrf_id);
} else {
ret = -1;
}
*offset = length;
if (abort_no_unlock) {
return (NULL);
}
/*
* Special case, I must call the output routine to
* get the cookie echoed
*/
if ((stcb != NULL) && (ret == 0)) {
sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
}
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
break;
case SCTP_SELECTIVE_ACK:
{
struct sctp_sack_chunk *sack;
int abort_now = 0;
uint32_t a_rwnd, cum_ack;
uint16_t num_seg, num_dup;
uint8_t flags;
int offset_seg, offset_dup;
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK\n");
SCTP_STAT_INCR(sctps_recvsacks);
if (stcb == NULL) {
SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing SACK chunk\n");
break;
}
if (chk_length < sizeof(struct sctp_sack_chunk)) {
SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
break;
}
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
/*-
* If we have sent a shutdown-ack, we will pay no
* attention to a sack sent in to us since
* we don't care anymore.
*/
break;
}
sack = (struct sctp_sack_chunk *)ch;
flags = ch->chunk_flags;
cum_ack = ntohl(sack->sack.cum_tsn_ack);
num_seg = ntohs(sack->sack.num_gap_ack_blks);
num_dup = ntohs(sack->sack.num_dup_tsns);
a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd);
if (sizeof(struct sctp_sack_chunk) +
num_seg * sizeof(struct sctp_gap_ack_block) +
num_dup * sizeof(uint32_t) != chk_length) {
SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
break;
}
offset_seg = *offset + sizeof(struct sctp_sack_chunk);
offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
cum_ack, num_seg, a_rwnd);
stcb->asoc.seen_a_sack_this_pkt = 1;
if ((stcb->asoc.pr_sctp_cnt == 0) &&
(num_seg == 0) &&
SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
(stcb->asoc.saw_sack_with_frags == 0) &&
(stcb->asoc.saw_sack_with_nr_frags == 0) &&
(!TAILQ_EMPTY(&stcb->asoc.sent_queue))
) {
/*
* We have a SIMPLE sack having no
* prior segments and data on sent
* queue to be acked.. Use the
* faster path sack processing. We
* also allow window update sacks
* with no missing segments to go
* this way too.
*/
sctp_express_handle_sack(stcb, cum_ack, a_rwnd, &abort_now, ecne_seen);
} else {
if (netp && *netp)
sctp_handle_sack(m, offset_seg, offset_dup, stcb,
num_seg, 0, num_dup, &abort_now, flags,
cum_ack, a_rwnd, ecne_seen);
}
if (abort_now) {
/* ABORT signal from sack processing */
*offset = length;
return (NULL);
}
if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
(stcb->asoc.stream_queue_cnt == 0)) {
sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
}
}
break;
/*
* EY - nr_sack: If the received chunk is an
* nr_sack chunk
*/
case SCTP_NR_SELECTIVE_ACK:
{
struct sctp_nr_sack_chunk *nr_sack;
int abort_now = 0;
uint32_t a_rwnd, cum_ack;
uint16_t num_seg, num_nr_seg, num_dup;
uint8_t flags;
int offset_seg, offset_dup;
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK\n");
SCTP_STAT_INCR(sctps_recvsacks);
if (stcb == NULL) {
SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing NR-SACK chunk\n");
break;
}
if (stcb->asoc.nrsack_supported == 0) {
goto unknown_chunk;
}
if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR-SACK chunk, too small\n");
break;
}
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
/*-
* If we have sent a shutdown-ack, we will pay no
* attention to a sack sent in to us since
* we don't care anymore.
*/
break;
}
nr_sack = (struct sctp_nr_sack_chunk *)ch;
flags = ch->chunk_flags;
cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
a_rwnd = (uint32_t) ntohl(nr_sack->nr_sack.a_rwnd);
if (sizeof(struct sctp_nr_sack_chunk) +
(num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
num_dup * sizeof(uint32_t) != chk_length) {
SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
break;
}
offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
cum_ack, num_seg, a_rwnd);
stcb->asoc.seen_a_sack_this_pkt = 1;
if ((stcb->asoc.pr_sctp_cnt == 0) &&
(num_seg == 0) && (num_nr_seg == 0) &&
SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
(stcb->asoc.saw_sack_with_frags == 0) &&
(stcb->asoc.saw_sack_with_nr_frags == 0) &&
(!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
/*
* We have a SIMPLE sack having no
* prior segments and data on sent
* queue to be acked. Use the faster
* path sack processing. We also
* allow window update sacks with no
* missing segments to go this way
* too.
*/
sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
&abort_now, ecne_seen);
} else {
if (netp && *netp)
sctp_handle_sack(m, offset_seg, offset_dup, stcb,
num_seg, num_nr_seg, num_dup, &abort_now, flags,
cum_ack, a_rwnd, ecne_seen);
}
if (abort_now) {
/* ABORT signal from sack processing */
*offset = length;
return (NULL);
}
if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
(stcb->asoc.stream_queue_cnt == 0)) {
sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
}
}
break;
case SCTP_HEARTBEAT_REQUEST:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
if ((stcb) && netp && *netp) {
SCTP_STAT_INCR(sctps_recvheartbeat);
sctp_send_heartbeat_ack(stcb, m, *offset,
chk_length, *netp);
/* He's alive so give him credit */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
}
break;
case SCTP_HEARTBEAT_ACK:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT-ACK\n");
if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
/* Its not ours */
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
/* He's alive so give him credit */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
SCTP_STAT_INCR(sctps_recvheartbeatack);
if (netp && *netp)
sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
stcb, *netp);
break;
case SCTP_ABORT_ASSOCIATION:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
(void *)stcb);
if ((stcb) && netp && *netp)
sctp_handle_abort((struct sctp_abort_chunk *)ch,
stcb, *netp);
*offset = length;
return (NULL);
break;
case SCTP_SHUTDOWN:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
(void *)stcb);
if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
if (netp && *netp) {
int abort_flag = 0;
sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
stcb, *netp, &abort_flag);
if (abort_flag) {
*offset = length;
return (NULL);
}
}
break;
case SCTP_SHUTDOWN_ACK:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-ACK, stcb %p\n", (void *)stcb);
if ((stcb) && (netp) && (*netp))
sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
*offset = length;
return (NULL);
break;
case SCTP_OPERATION_ERROR:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP-ERR\n");
if ((stcb) && netp && *netp && sctp_handle_error(ch, stcb, *netp) < 0) {
*offset = length;
return (NULL);
}
break;
case SCTP_COOKIE_ECHO:
SCTPDBG(SCTP_DEBUG_INPUT3,
"SCTP_COOKIE-ECHO, stcb %p\n", (void *)stcb);
if ((stcb) && (stcb->asoc.total_output_queue_size)) {
;
} else {
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
/* We are not interested anymore */
abend:
if (stcb) {
SCTP_TCB_UNLOCK(stcb);
}
*offset = length;
return (NULL);
}
}
/*
* First are we accepting? We do this again here
* since it is possible that a previous endpoint WAS
* listening responded to a INIT-ACK and then
* closed. We opened and bound.. and are now no
* longer listening.
*/
if ((stcb == NULL) && (inp->sctp_socket->so_qlen >= inp->sctp_socket->so_qlimit)) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
(SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
sctp_abort_association(inp, stcb, m, iphlen,
src, dst, sh, op_err,
mflowtype, mflowid,
vrf_id, port);
}
*offset = length;
return (NULL);
} else {
struct mbuf *ret_buf;
struct sctp_inpcb *linp;
if (stcb) {
linp = NULL;
} else {
linp = inp;
}
if (linp) {
SCTP_ASOC_CREATE_LOCK(linp);
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
SCTP_ASOC_CREATE_UNLOCK(linp);
goto abend;
}
}
if (netp) {
ret_buf =
sctp_handle_cookie_echo(m, iphlen,
*offset,
src, dst,
sh,
(struct sctp_cookie_echo_chunk *)ch,
&inp, &stcb, netp,
auth_skipped,
auth_offset,
auth_len,
&locked_tcb,
mflowtype,
mflowid,
vrf_id,
port);
} else {
ret_buf = NULL;
}
if (linp) {
SCTP_ASOC_CREATE_UNLOCK(linp);
}
if (ret_buf == NULL) {
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
SCTPDBG(SCTP_DEBUG_INPUT3,
"GAK, null buffer\n");
*offset = length;
return (NULL);
}
/* if AUTH skipped, see if it verified... */
if (auth_skipped) {
got_auth = 1;
auth_skipped = 0;
}
if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
/*
* Restart the timer if we have
* pending data
*/
struct sctp_tmit_chunk *chk;
chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
}
}
break;
case SCTP_COOKIE_ACK:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE-ACK, stcb %p\n", (void *)stcb);
if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
/* We are not interested anymore */
if ((stcb) && (stcb->asoc.total_output_queue_size)) {
;
} else if (stcb) {
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(inp);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
*offset = length;
return (NULL);
}
}
/* He's alive so give him credit */
if ((stcb) && netp && *netp) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
}
break;
case SCTP_ECN_ECHO:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-ECHO\n");
/* He's alive so give him credit */
if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
/* Its not ours */
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
if (stcb) {
if (stcb->asoc.ecn_supported == 0) {
goto unknown_chunk;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch,
stcb);
ecne_seen = 1;
}
break;
case SCTP_ECN_CWR:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-CWR\n");
/* He's alive so give him credit */
if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
/* Its not ours */
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
if (stcb) {
if (stcb->asoc.ecn_supported == 0) {
goto unknown_chunk;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
}
break;
case SCTP_SHUTDOWN_COMPLETE:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-COMPLETE, stcb %p\n", (void *)stcb);
/* must be first and only chunk */
if ((num_chunks > 1) ||
(length - *offset > (int)SCTP_SIZE32(chk_length))) {
*offset = length;
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
return (NULL);
}
if ((stcb) && netp && *netp) {
sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
stcb, *netp);
}
*offset = length;
return (NULL);
break;
case SCTP_ASCONF:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
/* He's alive so give him credit */
if (stcb) {
if (stcb->asoc.asconf_supported == 0) {
goto unknown_chunk;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
sctp_handle_asconf(m, *offset, src,
(struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
asconf_cnt++;
}
break;
case SCTP_ASCONF_ACK:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF-ACK\n");
if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
/* Its not ours */
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
if ((stcb) && netp && *netp) {
if (stcb->asoc.asconf_supported == 0) {
goto unknown_chunk;
}
/* He's alive so give him credit */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
sctp_handle_asconf_ack(m, *offset,
(struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
if (abort_no_unlock)
return (NULL);
}
break;
case SCTP_FORWARD_CUM_TSN:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD-TSN\n");
if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
/* Its not ours */
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
/* He's alive so give him credit */
if (stcb) {
int abort_flag = 0;
if (stcb->asoc.prsctp_supported == 0) {
goto unknown_chunk;
}
stcb->asoc.overall_error_count = 0;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
*fwd_tsn_seen = 1;
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
/* We are not interested anymore */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(inp);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
*offset = length;
return (NULL);
}
sctp_handle_forward_tsn(stcb,
(struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
if (abort_flag) {
*offset = length;
return (NULL);
} else {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
}
}
break;
case SCTP_STREAM_RESET:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
/* Its not ours */
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
if (stcb->asoc.reconfig_supported == 0) {
goto unknown_chunk;
}
if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
/* stop processing */
*offset = length;
return (NULL);
}
break;
case SCTP_PACKET_DROPPED:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
/* re-get it all please */
if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
/* Its not ours */
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
if (ch && (stcb) && netp && (*netp)) {
if (stcb->asoc.pktdrop_supported == 0) {
goto unknown_chunk;
}
sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
stcb, *netp,
min(chk_length, (sizeof(chunk_buf) - 4)));
}
break;
case SCTP_AUTHENTICATION:
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
if (stcb == NULL) {
/* save the first AUTH for later processing */
if (auth_skipped == 0) {
auth_offset = *offset;
auth_len = chk_length;
auth_skipped = 1;
}
/* skip this chunk (temporarily) */
goto next_chunk;
}
if (stcb->asoc.auth_supported == 0) {
goto unknown_chunk;
}
if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
(chk_length > (sizeof(struct sctp_auth_chunk) +
SCTP_AUTH_DIGEST_LEN_MAX))) {
/* Its not ours */
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
if (got_auth == 1) {
/* skip this chunk... it's already auth'd */
goto next_chunk;
}
got_auth = 1;
if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
m, *offset)) {
/* auth HMAC failed so dump the packet */
*offset = length;
return (stcb);
} else {
/* remaining chunks are HMAC checked */
stcb->asoc.authenticated = 1;
}
break;
default:
unknown_chunk:
/* it's an unknown chunk! */
if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
struct sctp_gen_error_cause *cause;
int len;
op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
0, M_NOWAIT, 1, MT_DATA);
if (op_err != NULL) {
len = min(SCTP_SIZE32(chk_length), (uint32_t) (length - *offset));
cause = mtod(op_err, struct sctp_gen_error_cause *);
cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
cause->length = htons(len + sizeof(struct sctp_gen_error_cause));
SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
if (SCTP_BUF_NEXT(op_err) != NULL) {
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
}
#endif
sctp_queue_op_err(stcb, op_err);
} else {
sctp_m_freem(op_err);
}
}
}
if ((ch->chunk_type & 0x80) == 0) {
/* discard this packet */
*offset = length;
return (stcb);
} /* else skip this bad chunk and continue... */
break;
} /* switch (ch->chunk_type) */
next_chunk:
/* get the next chunk */
*offset += SCTP_SIZE32(chk_length);
if (*offset >= length) {
/* no more data left in the mbuf chain */
break;
}
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
sizeof(struct sctp_chunkhdr), chunk_buf);
if (ch == NULL) {
if (locked_tcb) {
SCTP_TCB_UNLOCK(locked_tcb);
}
*offset = length;
return (NULL);
}
} /* while */
if (asconf_cnt > 0 && stcb != NULL) {
sctp_send_asconf_ack(stcb);
}
return (stcb);
}
-#ifdef INVARIANTS
-#ifdef __GNUC__
-__attribute__((noinline))
-#endif
- void
- sctp_validate_no_locks(struct sctp_inpcb *inp)
-{
- struct sctp_tcb *lstcb;
-
- LIST_FOREACH(lstcb, &inp->sctp_asoc_list, sctp_tcblist) {
- if (mtx_owned(&lstcb->tcb_mtx)) {
- panic("Own lock on stcb at return from input");
- }
- }
- if (mtx_owned(&inp->inp_create_mtx)) {
- panic("Own create lock on inp");
- }
- if (mtx_owned(&inp->inp_mtx)) {
- panic("Own inp lock on inp");
- }
-}
-
-#endif
-
/*
* common input chunk processing (v4 and v6)
*/
void
sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_chunkhdr *ch,
#if !defined(SCTP_WITH_NO_CSUM)
uint8_t compute_crc,
#endif
uint8_t ecn_bits,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
uint32_t high_tsn;
int fwd_tsn_seen = 0, data_processed = 0;
struct mbuf *m = *mm, *op_err;
char msg[SCTP_DIAG_INFO_LEN];
int un_sent;
int cnt_ctrl_ready = 0;
struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
struct sctp_tcb *stcb = NULL;
struct sctp_nets *net = NULL;
SCTP_STAT_INCR(sctps_recvdatagrams);
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xE0, 1);
sctp_auditing(0, inp, stcb, net);
#endif
#if !defined(SCTP_WITH_NO_CSUM)
if (compute_crc != 0) {
uint32_t check, calc_check;
check = sh->checksum;
sh->checksum = 0;
calc_check = sctp_calculate_cksum(m, iphlen);
sh->checksum = check;
if (calc_check != check) {
SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
calc_check, check, (void *)m, length, iphlen);
stcb = sctp_findassociation_addr(m, offset, src, dst,
sh, ch, &inp, &net, vrf_id);
#if defined(INET) || defined(INET6)
if ((net != NULL) && (port != 0)) {
if (net->port == 0) {
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
}
net->port = port;
}
#endif
if (net != NULL) {
net->flowtype = mflowtype;
net->flowid = mflowid;
}
if ((inp != NULL) && (stcb != NULL)) {
sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
} else if ((inp != NULL) && (stcb == NULL)) {
inp_decr = inp;
}
SCTP_STAT_INCR(sctps_badsum);
SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
goto out;
}
}
#endif
/* Destination port of 0 is illegal, based on RFC4960. */
if (sh->dest_port == 0) {
SCTP_STAT_INCR(sctps_hdrops);
goto out;
}
stcb = sctp_findassociation_addr(m, offset, src, dst,
sh, ch, &inp, &net, vrf_id);
#if defined(INET) || defined(INET6)
if ((net != NULL) && (port != 0)) {
if (net->port == 0) {
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
}
net->port = port;
}
#endif
if (net != NULL) {
net->flowtype = mflowtype;
net->flowid = mflowid;
}
if (inp == NULL) {
SCTP_STAT_INCR(sctps_noport);
if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
goto out;
}
if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
sctp_send_shutdown_complete2(src, dst, sh,
mflowtype, mflowid, fibnum,
vrf_id, port);
goto out;
}
if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
goto out;
}
if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
(ch->chunk_type != SCTP_INIT))) {
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
"Out of the blue");
sctp_send_abort(m, iphlen, src, dst,
sh, 0, op_err,
mflowtype, mflowid, fibnum,
vrf_id, port);
}
}
goto out;
} else if (stcb == NULL) {
inp_decr = inp;
}
#ifdef IPSEC
/*-
* I very much doubt any of the IPSEC stuff will work but I have no
* idea, so I will leave it in place.
*/
if (inp != NULL) {
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
if (ipsec4_in_reject(m, &inp->ip_inp.inp)) {
IPSECSTAT_INC(ips_in_polvio);
SCTP_STAT_INCR(sctps_hdrops);
goto out;
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (ipsec6_in_reject(m, &inp->ip_inp.inp)) {
IPSEC6STAT_INC(ips_in_polvio);
SCTP_STAT_INCR(sctps_hdrops);
goto out;
}
break;
#endif
default:
break;
}
}
#endif
SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
(void *)m, iphlen, offset, length, (void *)stcb);
if (stcb) {
/* always clear this before beginning a packet */
stcb->asoc.authenticated = 0;
stcb->asoc.seen_a_sack_this_pkt = 0;
SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
(void *)stcb, stcb->asoc.state);
if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
(stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
/*-
* If we hit here, we had a ref count
* up when the assoc was aborted and the
* timer is clearing out the assoc, we should
* NOT respond to any packet.. its OOTB.
*/
SCTP_TCB_UNLOCK(stcb);
stcb = NULL;
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
goto out;
}
}
if (IS_SCTP_CONTROL(ch)) {
/* process the control portion of the SCTP packet */
/* sa_ignore NO_NULL_CHK */
stcb = sctp_process_control(m, iphlen, &offset, length,
src, dst, sh, ch,
inp, stcb, &net, &fwd_tsn_seen,
mflowtype, mflowid, fibnum,
vrf_id, port);
if (stcb) {
/*
* This covers us if the cookie-echo was there and
* it changes our INP.
*/
inp = stcb->sctp_ep;
#if defined(INET) || defined(INET6)
if ((net != NULL) && (port != 0)) {
if (net->port == 0) {
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
}
net->port = port;
}
#endif
}
} else {
/*
* no control chunks, so pre-process DATA chunks (these
* checks are taken care of by control processing)
*/
/*
* if DATA only packet, and auth is required, then punt...
* can't have authenticated without any AUTH (control)
* chunks
*/
if ((stcb != NULL) &&
(stcb->asoc.auth_supported == 1) &&
sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
/* "silently" ignore */
SCTP_STAT_INCR(sctps_recvauthmissing);
goto out;
}
if (stcb == NULL) {
/* out of the blue DATA chunk */
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
mflowtype, mflowid, fibnum,
vrf_id, port);
goto out;
}
if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
/* v_tag mismatch! */
SCTP_STAT_INCR(sctps_badvtag);
goto out;
}
}
if (stcb == NULL) {
/*
* no valid TCB for this packet, or we found it's a bad
* packet while processing control, or we're done with this
* packet (done or skip rest of data), so we drop it...
*/
goto out;
}
/*
* DATA chunk processing
*/
/* plow through the data chunks while length > offset */
/*
* Rest should be DATA only. Check authentication state if AUTH for
* DATA is required.
*/
if ((length > offset) &&
(stcb != NULL) &&
(stcb->asoc.auth_supported == 1) &&
sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
!stcb->asoc.authenticated) {
/* "silently" ignore */
SCTP_STAT_INCR(sctps_recvauthmissing);
SCTPDBG(SCTP_DEBUG_AUTH1,
"Data chunk requires AUTH, skipped\n");
goto trigger_send;
}
if (length > offset) {
int retval;
/*
* First check to make sure our state is correct. We would
* not get here unless we really did have a tag, so we don't
* abort if this happens, just dump the chunk silently.
*/
switch (SCTP_GET_STATE(&stcb->asoc)) {
case SCTP_STATE_COOKIE_ECHOED:
/*
* we consider data with valid tags in this state
* shows us the cookie-ack was lost. Imply it was
* there.
*/
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
stcb->asoc.overall_error_count,
0,
SCTP_FROM_SCTP_INPUT,
__LINE__);
}
stcb->asoc.overall_error_count = 0;
sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
break;
case SCTP_STATE_COOKIE_WAIT:
/*
* We consider OOTB any data sent during asoc setup.
*/
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
goto out;
/* sa_ignore NOTREACHED */
break;
case SCTP_STATE_EMPTY: /* should not happen */
case SCTP_STATE_INUSE: /* should not happen */
case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
case SCTP_STATE_SHUTDOWN_ACK_SENT:
default:
goto out;
/* sa_ignore NOTREACHED */
break;
case SCTP_STATE_OPEN:
case SCTP_STATE_SHUTDOWN_SENT:
break;
}
/* plow through the data chunks while length > offset */
retval = sctp_process_data(mm, iphlen, &offset, length,
inp, stcb, net, &high_tsn);
if (retval == 2) {
/*
* The association aborted, NO UNLOCK needed since
* the association is destroyed.
*/
stcb = NULL;
goto out;
}
data_processed = 1;
/*
* Anything important needs to have been m_copy'ed in
* process_data
*/
}
/* take care of ecn */
if ((data_processed == 1) &&
(stcb->asoc.ecn_supported == 1) &&
((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
/* Yep, we need to add a ECNE */
sctp_send_ecn_echo(stcb, net, high_tsn);
}
if ((data_processed == 0) && (fwd_tsn_seen)) {
int was_a_gap;
uint32_t highest_tsn;
if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
} else {
highest_tsn = stcb->asoc.highest_tsn_inside_map;
}
was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
stcb->asoc.send_sack = 1;
sctp_sack_check(stcb, was_a_gap);
} else if (fwd_tsn_seen) {
stcb->asoc.send_sack = 1;
}
/* trigger send of any chunks in queue... */
trigger_send:
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xE0, 2);
sctp_auditing(1, inp, stcb, net);
#endif
SCTPDBG(SCTP_DEBUG_INPUT1,
"Check for chunk output prw:%d tqe:%d tf=%d\n",
stcb->asoc.peers_rwnd,
TAILQ_EMPTY(&stcb->asoc.control_send_queue),
stcb->asoc.total_flight);
un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
}
if (cnt_ctrl_ready || stcb->asoc.trigger_reset ||
((un_sent) &&
(stcb->asoc.peers_rwnd > 0 ||
(stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
}
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xE0, 3);
sctp_auditing(2, inp, stcb, net);
#endif
out:
if (stcb != NULL) {
SCTP_TCB_UNLOCK(stcb);
}
if (inp_decr != NULL) {
/* reduce ref-count */
SCTP_INP_WLOCK(inp_decr);
SCTP_INP_DECR_REF(inp_decr);
SCTP_INP_WUNLOCK(inp_decr);
}
-#ifdef INVARIANTS
- if (inp != NULL) {
- sctp_validate_no_locks(inp);
- }
-#endif
return;
}
#if 0
static void
sctp_print_mbuf_chain(struct mbuf *m)
{
for (; m; m = SCTP_BUF_NEXT(m)) {
SCTP_PRINTF("%p: m_len = %ld\n", (void *)m, SCTP_BUF_LEN(m));
if (SCTP_BUF_IS_EXTENDED(m))
SCTP_PRINTF("%p: extend_size = %d\n", (void *)m, SCTP_BUF_EXTEND_SIZE(m));
}
}
#endif
#ifdef INET
void
sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
{
struct mbuf *m;
int iphlen;
uint32_t vrf_id = 0;
uint8_t ecn_bits;
struct sockaddr_in src, dst;
struct ip *ip;
struct sctphdr *sh;
struct sctp_chunkhdr *ch;
int length, offset;
#if !defined(SCTP_WITH_NO_CSUM)
uint8_t compute_crc;
#endif
uint32_t mflowid;
uint8_t mflowtype;
uint16_t fibnum;
iphlen = off;
if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
SCTP_RELEASE_PKT(i_pak);
return;
}
m = SCTP_HEADER_TO_CHAIN(i_pak);
#ifdef SCTP_MBUF_LOGGING
/* Log in any input mbufs */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(m, SCTP_MBUF_INPUT);
}
#endif
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
sctp_packet_log(m);
}
#endif
SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
"sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
m->m_pkthdr.len,
if_name(m->m_pkthdr.rcvif),
(int)m->m_pkthdr.csum_flags, CSUM_BITS);
mflowid = m->m_pkthdr.flowid;
mflowtype = M_HASHTYPE_GET(m);
fibnum = M_GETFIB(m);
SCTP_STAT_INCR(sctps_recvpackets);
SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
/* Get IP, SCTP, and first chunk header together in the first mbuf. */
offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
if (SCTP_BUF_LEN(m) < offset) {
if ((m = m_pullup(m, offset)) == NULL) {
SCTP_STAT_INCR(sctps_hdrops);
return;
}
}
ip = mtod(m, struct ip *);
sh = (struct sctphdr *)((caddr_t)ip + iphlen);
ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
offset -= sizeof(struct sctp_chunkhdr);
memset(&src, 0, sizeof(struct sockaddr_in));
src.sin_family = AF_INET;
src.sin_len = sizeof(struct sockaddr_in);
src.sin_port = sh->src_port;
src.sin_addr = ip->ip_src;
memset(&dst, 0, sizeof(struct sockaddr_in));
dst.sin_family = AF_INET;
dst.sin_len = sizeof(struct sockaddr_in);
dst.sin_port = sh->dest_port;
dst.sin_addr = ip->ip_dst;
length = ntohs(ip->ip_len);
/* Validate mbuf chain length with IP payload length. */
if (SCTP_HEADER_LEN(m) != length) {
SCTPDBG(SCTP_DEBUG_INPUT1,
"sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
SCTP_STAT_INCR(sctps_hdrops);
goto out;
}
/* SCTP does not allow broadcasts or multicasts */
if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
goto out;
}
if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
goto out;
}
ecn_bits = ip->ip_tos;
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_recvnocrc);
#else
if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
SCTP_STAT_INCR(sctps_recvhwcrc);
compute_crc = 0;
} else {
SCTP_STAT_INCR(sctps_recvswcrc);
compute_crc = 1;
}
#endif
sctp_common_input_processing(&m, iphlen, offset, length,
(struct sockaddr *)&src,
(struct sockaddr *)&dst,
sh, ch,
#if !defined(SCTP_WITH_NO_CSUM)
compute_crc,
#endif
ecn_bits,
mflowtype, mflowid, fibnum,
vrf_id, port);
out:
if (m) {
sctp_m_freem(m);
}
return;
}
#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
extern int *sctp_cpuarry;
#endif
void
sctp_input(struct mbuf *m, int off)
{
#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
struct ip *ip;
struct sctphdr *sh;
int offset;
int cpu_to_use;
uint32_t flowid, tag;
if (mp_ncpus > 1) {
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
flowid = m->m_pkthdr.flowid;
} else {
/*
* No flow id built by lower layers fix it so we
* create one.
*/
offset = off + sizeof(struct sctphdr);
if (SCTP_BUF_LEN(m) < offset) {
if ((m = m_pullup(m, offset)) == NULL) {
SCTP_STAT_INCR(sctps_hdrops);
return;
}
}
ip = mtod(m, struct ip *);
sh = (struct sctphdr *)((caddr_t)ip + off);
tag = htonl(sh->v_tag);
flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
m->m_pkthdr.flowid = flowid;
M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE);
}
cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
sctp_queue_to_mcore(m, off, cpu_to_use);
return;
}
#endif
sctp_input_with_port(m, off, 0);
}
#endif
Index: stable/10/sys/netinet/sctp_output.c
===================================================================
--- stable/10/sys/netinet/sctp_output.c (revision 294215)
+++ stable/10/sys/netinet/sctp_output.c (revision 294216)
@@ -1,13713 +1,13706 @@
/*-
* Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <netinet/sctp_os.h>
#include <sys/proc.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_sysctl.h>
#include <netinet/sctp_header.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_auth.h>
#include <netinet/sctp_timer.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_indata.h>
#include <netinet/sctp_bsd_addr.h>
#include <netinet/sctp_input.h>
#include <netinet/sctp_crc32.h>
#if defined(INET) || defined(INET6)
#include <netinet/udp.h>
#endif
#include <netinet/udp_var.h>
#include <machine/in_cksum.h>
#define SCTP_MAX_GAPS_INARRAY 4
struct sack_track {
uint8_t right_edge; /* mergable on the right edge */
uint8_t left_edge; /* mergable on the left edge */
uint8_t num_entries;
uint8_t spare;
struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY];
};
struct sack_track sack_array[256] = {
{0, 0, 0, 0, /* 0x00 */
{{0, 0},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x01 */
{{0, 0},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x02 */
{{1, 1},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x03 */
{{0, 1},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x04 */
{{2, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x05 */
{{0, 0},
{2, 2},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x06 */
{{1, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x07 */
{{0, 2},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x08 */
{{3, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x09 */
{{0, 0},
{3, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x0a */
{{1, 1},
{3, 3},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x0b */
{{0, 1},
{3, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x0c */
{{2, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x0d */
{{0, 0},
{2, 3},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x0e */
{{1, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x0f */
{{0, 3},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x10 */
{{4, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x11 */
{{0, 0},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x12 */
{{1, 1},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x13 */
{{0, 1},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x14 */
{{2, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x15 */
{{0, 0},
{2, 2},
{4, 4},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x16 */
{{1, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x17 */
{{0, 2},
{4, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x18 */
{{3, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x19 */
{{0, 0},
{3, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x1a */
{{1, 1},
{3, 4},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x1b */
{{0, 1},
{3, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x1c */
{{2, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x1d */
{{0, 0},
{2, 4},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x1e */
{{1, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x1f */
{{0, 4},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x20 */
{{5, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x21 */
{{0, 0},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x22 */
{{1, 1},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x23 */
{{0, 1},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x24 */
{{2, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x25 */
{{0, 0},
{2, 2},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x26 */
{{1, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x27 */
{{0, 2},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x28 */
{{3, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x29 */
{{0, 0},
{3, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 3, 0, /* 0x2a */
{{1, 1},
{3, 3},
{5, 5},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x2b */
{{0, 1},
{3, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x2c */
{{2, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x2d */
{{0, 0},
{2, 3},
{5, 5},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x2e */
{{1, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x2f */
{{0, 3},
{5, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x30 */
{{4, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x31 */
{{0, 0},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x32 */
{{1, 1},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x33 */
{{0, 1},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x34 */
{{2, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x35 */
{{0, 0},
{2, 2},
{4, 5},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x36 */
{{1, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x37 */
{{0, 2},
{4, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x38 */
{{3, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x39 */
{{0, 0},
{3, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x3a */
{{1, 1},
{3, 5},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x3b */
{{0, 1},
{3, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x3c */
{{2, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x3d */
{{0, 0},
{2, 5},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x3e */
{{1, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x3f */
{{0, 5},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x40 */
{{6, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x41 */
{{0, 0},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x42 */
{{1, 1},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x43 */
{{0, 1},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x44 */
{{2, 2},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x45 */
{{0, 0},
{2, 2},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x46 */
{{1, 2},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x47 */
{{0, 2},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x48 */
{{3, 3},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x49 */
{{0, 0},
{3, 3},
{6, 6},
{0, 0}
}
},
{0, 0, 3, 0, /* 0x4a */
{{1, 1},
{3, 3},
{6, 6},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x4b */
{{0, 1},
{3, 3},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x4c */
{{2, 3},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x4d */
{{0, 0},
{2, 3},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x4e */
{{1, 3},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x4f */
{{0, 3},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x50 */
{{4, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x51 */
{{0, 0},
{4, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 3, 0, /* 0x52 */
{{1, 1},
{4, 4},
{6, 6},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x53 */
{{0, 1},
{4, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 3, 0, /* 0x54 */
{{2, 2},
{4, 4},
{6, 6},
{0, 0}
}
},
{1, 0, 4, 0, /* 0x55 */
{{0, 0},
{2, 2},
{4, 4},
{6, 6}
}
},
{0, 0, 3, 0, /* 0x56 */
{{1, 2},
{4, 4},
{6, 6},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x57 */
{{0, 2},
{4, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x58 */
{{3, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x59 */
{{0, 0},
{3, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 3, 0, /* 0x5a */
{{1, 1},
{3, 4},
{6, 6},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x5b */
{{0, 1},
{3, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x5c */
{{2, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x5d */
{{0, 0},
{2, 4},
{6, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x5e */
{{1, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x5f */
{{0, 4},
{6, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x60 */
{{5, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x61 */
{{0, 0},
{5, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x62 */
{{1, 1},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x63 */
{{0, 1},
{5, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x64 */
{{2, 2},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x65 */
{{0, 0},
{2, 2},
{5, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x66 */
{{1, 2},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x67 */
{{0, 2},
{5, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x68 */
{{3, 3},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x69 */
{{0, 0},
{3, 3},
{5, 6},
{0, 0}
}
},
{0, 0, 3, 0, /* 0x6a */
{{1, 1},
{3, 3},
{5, 6},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x6b */
{{0, 1},
{3, 3},
{5, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x6c */
{{2, 3},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x6d */
{{0, 0},
{2, 3},
{5, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x6e */
{{1, 3},
{5, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x6f */
{{0, 3},
{5, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x70 */
{{4, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x71 */
{{0, 0},
{4, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x72 */
{{1, 1},
{4, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x73 */
{{0, 1},
{4, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x74 */
{{2, 2},
{4, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 3, 0, /* 0x75 */
{{0, 0},
{2, 2},
{4, 6},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x76 */
{{1, 2},
{4, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x77 */
{{0, 2},
{4, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x78 */
{{3, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x79 */
{{0, 0},
{3, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 2, 0, /* 0x7a */
{{1, 1},
{3, 6},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x7b */
{{0, 1},
{3, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x7c */
{{2, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 2, 0, /* 0x7d */
{{0, 0},
{2, 6},
{0, 0},
{0, 0}
}
},
{0, 0, 1, 0, /* 0x7e */
{{1, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 0, 1, 0, /* 0x7f */
{{0, 6},
{0, 0},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0, /* 0x80 */
{{7, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0x81 */
{{0, 0},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x82 */
{{1, 1},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0x83 */
{{0, 1},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x84 */
{{2, 2},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x85 */
{{0, 0},
{2, 2},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x86 */
{{1, 2},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0x87 */
{{0, 2},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x88 */
{{3, 3},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x89 */
{{0, 0},
{3, 3},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0x8a */
{{1, 1},
{3, 3},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x8b */
{{0, 1},
{3, 3},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x8c */
{{2, 3},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x8d */
{{0, 0},
{2, 3},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x8e */
{{1, 3},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0x8f */
{{0, 3},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x90 */
{{4, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x91 */
{{0, 0},
{4, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0x92 */
{{1, 1},
{4, 4},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x93 */
{{0, 1},
{4, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0x94 */
{{2, 2},
{4, 4},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0, /* 0x95 */
{{0, 0},
{2, 2},
{4, 4},
{7, 7}
}
},
{0, 1, 3, 0, /* 0x96 */
{{1, 2},
{4, 4},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x97 */
{{0, 2},
{4, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x98 */
{{3, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x99 */
{{0, 0},
{3, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0x9a */
{{1, 1},
{3, 4},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x9b */
{{0, 1},
{3, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x9c */
{{2, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0x9d */
{{0, 0},
{2, 4},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0x9e */
{{1, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0x9f */
{{0, 4},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xa0 */
{{5, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xa1 */
{{0, 0},
{5, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xa2 */
{{1, 1},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xa3 */
{{0, 1},
{5, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xa4 */
{{2, 2},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0, /* 0xa5 */
{{0, 0},
{2, 2},
{5, 5},
{7, 7}
}
},
{0, 1, 3, 0, /* 0xa6 */
{{1, 2},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xa7 */
{{0, 2},
{5, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xa8 */
{{3, 3},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0, /* 0xa9 */
{{0, 0},
{3, 3},
{5, 5},
{7, 7}
}
},
{0, 1, 4, 0, /* 0xaa */
{{1, 1},
{3, 3},
{5, 5},
{7, 7}
}
},
{1, 1, 4, 0, /* 0xab */
{{0, 1},
{3, 3},
{5, 5},
{7, 7}
}
},
{0, 1, 3, 0, /* 0xac */
{{2, 3},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0, /* 0xad */
{{0, 0},
{2, 3},
{5, 5},
{7, 7}
}
},
{0, 1, 3, 0, /* 0xae */
{{1, 3},
{5, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xaf */
{{0, 3},
{5, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xb0 */
{{4, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xb1 */
{{0, 0},
{4, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xb2 */
{{1, 1},
{4, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xb3 */
{{0, 1},
{4, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xb4 */
{{2, 2},
{4, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 4, 0, /* 0xb5 */
{{0, 0},
{2, 2},
{4, 5},
{7, 7}
}
},
{0, 1, 3, 0, /* 0xb6 */
{{1, 2},
{4, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xb7 */
{{0, 2},
{4, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xb8 */
{{3, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xb9 */
{{0, 0},
{3, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xba */
{{1, 1},
{3, 5},
{7, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xbb */
{{0, 1},
{3, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xbc */
{{2, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xbd */
{{0, 0},
{2, 5},
{7, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xbe */
{{1, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xbf */
{{0, 5},
{7, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0, /* 0xc0 */
{{6, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xc1 */
{{0, 0},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xc2 */
{{1, 1},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xc3 */
{{0, 1},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xc4 */
{{2, 2},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xc5 */
{{0, 0},
{2, 2},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xc6 */
{{1, 2},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xc7 */
{{0, 2},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xc8 */
{{3, 3},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xc9 */
{{0, 0},
{3, 3},
{6, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xca */
{{1, 1},
{3, 3},
{6, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xcb */
{{0, 1},
{3, 3},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xcc */
{{2, 3},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xcd */
{{0, 0},
{2, 3},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xce */
{{1, 3},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xcf */
{{0, 3},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xd0 */
{{4, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xd1 */
{{0, 0},
{4, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xd2 */
{{1, 1},
{4, 4},
{6, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xd3 */
{{0, 1},
{4, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xd4 */
{{2, 2},
{4, 4},
{6, 7},
{0, 0}
}
},
{1, 1, 4, 0, /* 0xd5 */
{{0, 0},
{2, 2},
{4, 4},
{6, 7}
}
},
{0, 1, 3, 0, /* 0xd6 */
{{1, 2},
{4, 4},
{6, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xd7 */
{{0, 2},
{4, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xd8 */
{{3, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xd9 */
{{0, 0},
{3, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xda */
{{1, 1},
{3, 4},
{6, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xdb */
{{0, 1},
{3, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xdc */
{{2, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xdd */
{{0, 0},
{2, 4},
{6, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xde */
{{1, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xdf */
{{0, 4},
{6, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0, /* 0xe0 */
{{5, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xe1 */
{{0, 0},
{5, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xe2 */
{{1, 1},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xe3 */
{{0, 1},
{5, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xe4 */
{{2, 2},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xe5 */
{{0, 0},
{2, 2},
{5, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xe6 */
{{1, 2},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xe7 */
{{0, 2},
{5, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xe8 */
{{3, 3},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xe9 */
{{0, 0},
{3, 3},
{5, 7},
{0, 0}
}
},
{0, 1, 3, 0, /* 0xea */
{{1, 1},
{3, 3},
{5, 7},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xeb */
{{0, 1},
{3, 3},
{5, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xec */
{{2, 3},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xed */
{{0, 0},
{2, 3},
{5, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xee */
{{1, 3},
{5, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xef */
{{0, 3},
{5, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0, /* 0xf0 */
{{4, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xf1 */
{{0, 0},
{4, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xf2 */
{{1, 1},
{4, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xf3 */
{{0, 1},
{4, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xf4 */
{{2, 2},
{4, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 3, 0, /* 0xf5 */
{{0, 0},
{2, 2},
{4, 7},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xf6 */
{{1, 2},
{4, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xf7 */
{{0, 2},
{4, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0, /* 0xf8 */
{{3, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xf9 */
{{0, 0},
{3, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 2, 0, /* 0xfa */
{{1, 1},
{3, 7},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xfb */
{{0, 1},
{3, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0, /* 0xfc */
{{2, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 2, 0, /* 0xfd */
{{0, 0},
{2, 7},
{0, 0},
{0, 0}
}
},
{0, 1, 1, 0, /* 0xfe */
{{1, 7},
{0, 0},
{0, 0},
{0, 0}
}
},
{1, 1, 1, 0, /* 0xff */
{{0, 7},
{0, 0},
{0, 0},
{0, 0}
}
}
};
int
sctp_is_address_in_scope(struct sctp_ifa *ifa,
struct sctp_scoping *scope,
int do_update)
{
if ((scope->loopback_scope == 0) &&
(ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) {
/*
* skip loopback if not in scope *
*/
return (0);
}
switch (ifa->address.sa.sa_family) {
#ifdef INET
case AF_INET:
if (scope->ipv4_addr_legal) {
struct sockaddr_in *sin;
sin = &ifa->address.sin;
if (sin->sin_addr.s_addr == 0) {
/* not in scope , unspecified */
return (0);
}
if ((scope->ipv4_local_scope == 0) &&
(IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
/* private address not in scope */
return (0);
}
} else {
return (0);
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (scope->ipv6_addr_legal) {
struct sockaddr_in6 *sin6;
/*
* Must update the flags, bummer, which means any
* IFA locks must now be applied HERE <->
*/
if (do_update) {
sctp_gather_internal_ifa_flags(ifa);
}
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
return (0);
}
/* ok to use deprecated addresses? */
sin6 = &ifa->address.sin6;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
/* skip unspecifed addresses */
return (0);
}
if ( /* (local_scope == 0) && */
(IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) {
return (0);
}
if ((scope->site_scope == 0) &&
(IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
return (0);
}
} else {
return (0);
}
break;
#endif
default:
return (0);
}
return (1);
}
static struct mbuf *
sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len)
{
#if defined(INET) || defined(INET6)
struct sctp_paramhdr *parmh;
struct mbuf *mret;
uint16_t plen;
#endif
switch (ifa->address.sa.sa_family) {
#ifdef INET
case AF_INET:
plen = (uint16_t) sizeof(struct sctp_ipv4addr_param);
break;
#endif
#ifdef INET6
case AF_INET6:
plen = (uint16_t) sizeof(struct sctp_ipv6addr_param);
break;
#endif
default:
return (m);
}
#if defined(INET) || defined(INET6)
if (M_TRAILINGSPACE(m) >= plen) {
/* easy side we just drop it on the end */
parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m)));
mret = m;
} else {
/* Need more space */
mret = m;
while (SCTP_BUF_NEXT(mret) != NULL) {
mret = SCTP_BUF_NEXT(mret);
}
SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA);
if (SCTP_BUF_NEXT(mret) == NULL) {
/* We are hosed, can't add more addresses */
return (m);
}
mret = SCTP_BUF_NEXT(mret);
parmh = mtod(mret, struct sctp_paramhdr *);
}
/* now add the parameter */
switch (ifa->address.sa.sa_family) {
#ifdef INET
case AF_INET:
{
struct sctp_ipv4addr_param *ipv4p;
struct sockaddr_in *sin;
sin = &ifa->address.sin;
ipv4p = (struct sctp_ipv4addr_param *)parmh;
parmh->param_type = htons(SCTP_IPV4_ADDRESS);
parmh->param_length = htons(plen);
ipv4p->addr = sin->sin_addr.s_addr;
SCTP_BUF_LEN(mret) += plen;
break;
}
#endif
#ifdef INET6
case AF_INET6:
{
struct sctp_ipv6addr_param *ipv6p;
struct sockaddr_in6 *sin6;
sin6 = &ifa->address.sin6;
ipv6p = (struct sctp_ipv6addr_param *)parmh;
parmh->param_type = htons(SCTP_IPV6_ADDRESS);
parmh->param_length = htons(plen);
memcpy(ipv6p->addr, &sin6->sin6_addr,
sizeof(ipv6p->addr));
/* clear embedded scope in the address */
in6_clearscope((struct in6_addr *)ipv6p->addr);
SCTP_BUF_LEN(mret) += plen;
break;
}
#endif
default:
return (m);
}
if (len != NULL) {
*len += plen;
}
return (mret);
#endif
}
struct mbuf *
sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_scoping *scope,
struct mbuf *m_at, int cnt_inits_to,
uint16_t * padding_len, uint16_t * chunk_len)
{
struct sctp_vrf *vrf = NULL;
int cnt, limit_out = 0, total_count;
uint32_t vrf_id;
vrf_id = inp->def_vrf_id;
SCTP_IPI_ADDR_RLOCK();
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL) {
SCTP_IPI_ADDR_RUNLOCK();
return (m_at);
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
struct sctp_ifa *sctp_ifap;
struct sctp_ifn *sctp_ifnp;
cnt = cnt_inits_to;
if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) {
limit_out = 1;
cnt = SCTP_ADDRESS_LIMIT;
goto skip_count;
}
LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
if ((scope->loopback_scope == 0) &&
SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
/*
* Skip loopback devices if loopback_scope
* not set
*/
continue;
}
LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifap->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifap->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
continue;
}
if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) {
continue;
}
cnt++;
if (cnt > SCTP_ADDRESS_LIMIT) {
break;
}
}
if (cnt > SCTP_ADDRESS_LIMIT) {
break;
}
}
skip_count:
if (cnt > 1) {
total_count = 0;
LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) {
cnt = 0;
if ((scope->loopback_scope == 0) &&
SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) {
/*
* Skip loopback devices if
* loopback_scope not set
*/
continue;
}
LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifap->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifap->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifap->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifap->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if (sctp_is_addr_restricted(stcb, sctp_ifap)) {
continue;
}
if (sctp_is_address_in_scope(sctp_ifap,
scope, 0) == 0) {
continue;
}
if ((chunk_len != NULL) &&
(padding_len != NULL) &&
(*padding_len > 0)) {
memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
SCTP_BUF_LEN(m_at) += *padding_len;
*chunk_len += *padding_len;
*padding_len = 0;
}
m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len);
if (limit_out) {
cnt++;
total_count++;
if (cnt >= 2) {
/*
* two from each
* address
*/
break;
}
if (total_count > SCTP_ADDRESS_LIMIT) {
/* No more addresses */
break;
}
}
}
}
}
} else {
struct sctp_laddr *laddr;
cnt = cnt_inits_to;
/* First, how many ? */
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa == NULL) {
continue;
}
if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED)
/*
* Address being deleted by the system, dont
* list.
*/
continue;
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
/*
* Address being deleted on this ep don't
* list.
*/
continue;
}
if (sctp_is_address_in_scope(laddr->ifa,
scope, 1) == 0) {
continue;
}
cnt++;
}
/*
* To get through a NAT we only list addresses if we have
* more than one. That way if you just bind a single address
* we let the source of the init dictate our address.
*/
if (cnt > 1) {
cnt = cnt_inits_to;
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa == NULL) {
continue;
}
if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
continue;
}
if (sctp_is_address_in_scope(laddr->ifa,
scope, 0) == 0) {
continue;
}
if ((chunk_len != NULL) &&
(padding_len != NULL) &&
(*padding_len > 0)) {
memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len);
SCTP_BUF_LEN(m_at) += *padding_len;
*chunk_len += *padding_len;
*padding_len = 0;
}
m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len);
cnt++;
if (cnt >= SCTP_ADDRESS_LIMIT) {
break;
}
}
}
}
SCTP_IPI_ADDR_RUNLOCK();
return (m_at);
}
static struct sctp_ifa *
sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa,
uint8_t dest_is_loop,
uint8_t dest_is_priv,
sa_family_t fam)
{
uint8_t dest_is_global = 0;
/* dest_is_priv is true if destination is a private address */
/* dest_is_loop is true if destination is a loopback addresses */
/**
* Here we determine if its a preferred address. A preferred address
* means it is the same scope or higher scope then the destination.
* L = loopback, P = private, G = global
* -----------------------------------------
* src | dest | result
* ----------------------------------------
* L | L | yes
* -----------------------------------------
* P | L | yes-v4 no-v6
* -----------------------------------------
* G | L | yes-v4 no-v6
* -----------------------------------------
* L | P | no
* -----------------------------------------
* P | P | yes
* -----------------------------------------
* G | P | no
* -----------------------------------------
* L | G | no
* -----------------------------------------
* P | G | no
* -----------------------------------------
* G | G | yes
* -----------------------------------------
*/
if (ifa->address.sa.sa_family != fam) {
/* forget mis-matched family */
return (NULL);
}
if ((dest_is_priv == 0) && (dest_is_loop == 0)) {
dest_is_global = 1;
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa);
/* Ok the address may be ok */
#ifdef INET6
if (fam == AF_INET6) {
/* ok to use deprecated addresses? no lets not! */
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n");
return (NULL);
}
if (ifa->src_is_priv && !ifa->src_is_loop) {
if (dest_is_loop) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n");
return (NULL);
}
}
if (ifa->src_is_glob) {
if (dest_is_loop) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n");
return (NULL);
}
}
}
#endif
/*
* Now that we know what is what, implement or table this could in
* theory be done slicker (it used to be), but this is
* straightforward and easier to validate :-)
*/
SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n",
ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n",
dest_is_loop, dest_is_priv, dest_is_global);
if ((ifa->src_is_loop) && (dest_is_priv)) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n");
return (NULL);
}
if ((ifa->src_is_glob) && (dest_is_priv)) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n");
return (NULL);
}
if ((ifa->src_is_loop) && (dest_is_global)) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n");
return (NULL);
}
if ((ifa->src_is_priv) && (dest_is_global)) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n");
return (NULL);
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n");
/* its a preferred address */
return (ifa);
}
static struct sctp_ifa *
sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa,
uint8_t dest_is_loop,
uint8_t dest_is_priv,
sa_family_t fam)
{
uint8_t dest_is_global = 0;
/**
* Here we determine if its a acceptable address. A acceptable
* address means it is the same scope or higher scope but we can
* allow for NAT which means its ok to have a global dest and a
* private src.
*
* L = loopback, P = private, G = global
* -----------------------------------------
* src | dest | result
* -----------------------------------------
* L | L | yes
* -----------------------------------------
* P | L | yes-v4 no-v6
* -----------------------------------------
* G | L | yes
* -----------------------------------------
* L | P | no
* -----------------------------------------
* P | P | yes
* -----------------------------------------
* G | P | yes - May not work
* -----------------------------------------
* L | G | no
* -----------------------------------------
* P | G | yes - May not work
* -----------------------------------------
* G | G | yes
* -----------------------------------------
*/
if (ifa->address.sa.sa_family != fam) {
/* forget non matching family */
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n",
ifa->address.sa.sa_family, fam);
return (NULL);
}
/* Ok the address may be ok */
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n",
dest_is_loop, dest_is_priv);
if ((dest_is_loop == 0) && (dest_is_priv == 0)) {
dest_is_global = 1;
}
#ifdef INET6
if (fam == AF_INET6) {
/* ok to use deprecated addresses? */
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
return (NULL);
}
if (ifa->src_is_priv) {
/* Special case, linklocal to loop */
if (dest_is_loop)
return (NULL);
}
}
#endif
/*
* Now that we know what is what, implement our table. This could in
* theory be done slicker (it used to be), but this is
* straightforward and easier to validate :-)
*/
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n",
ifa->src_is_loop,
dest_is_priv);
if ((ifa->src_is_loop == 1) && (dest_is_priv)) {
return (NULL);
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n",
ifa->src_is_loop,
dest_is_global);
if ((ifa->src_is_loop == 1) && (dest_is_global)) {
return (NULL);
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n");
/* its an acceptable address */
return (ifa);
}
int
sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
{
struct sctp_laddr *laddr;
if (stcb == NULL) {
/* There are no restrictions, no TCB :-) */
return (0);
}
LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
if (laddr->ifa == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
__func__);
continue;
}
if (laddr->ifa == ifa) {
/* Yes it is on the list */
return (1);
}
}
return (0);
}
int
sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
{
struct sctp_laddr *laddr;
if (ifa == NULL)
return (0);
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n",
__func__);
continue;
}
if ((laddr->ifa == ifa) && laddr->action == 0)
/* same pointer */
return (1);
}
return (0);
}
static struct sctp_ifa *
sctp_choose_boundspecific_inp(struct sctp_inpcb *inp,
sctp_route_t * ro,
uint32_t vrf_id,
int non_asoc_addr_ok,
uint8_t dest_is_priv,
uint8_t dest_is_loop,
sa_family_t fam)
{
struct sctp_laddr *laddr, *starting_point;
void *ifn;
int resettotop = 0;
struct sctp_ifn *sctp_ifn;
struct sctp_ifa *sctp_ifa, *sifa;
struct sctp_vrf *vrf;
uint32_t ifn_index;
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL)
return (NULL);
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
sctp_ifn = sctp_find_ifn(ifn, ifn_index);
/*
* first question, is the ifn we will emit on in our list, if so, we
* want such an address. Note that we first looked for a preferred
* address.
*/
if (sctp_ifn) {
/* is a preferred one on the interface we route out? */
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0))
continue;
sifa = sctp_is_ifa_addr_preferred(sctp_ifa,
dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
if (sctp_is_addr_in_ep(inp, sifa)) {
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
}
}
/*
* ok, now we now need to find one on the list of the addresses. We
* can't get one on the emitting interface so let's find first a
* preferred one. If not that an acceptable one otherwise... we
* return NULL.
*/
starting_point = inp->next_addr_touse;
once_again:
if (inp->next_addr_touse == NULL) {
inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
resettotop = 1;
}
for (laddr = inp->next_addr_touse; laddr;
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
if (laddr->ifa == NULL) {
/* address has been removed */
continue;
}
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
/* address is being deleted */
continue;
}
sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
if (resettotop == 0) {
inp->next_addr_touse = NULL;
goto once_again;
}
inp->next_addr_touse = starting_point;
resettotop = 0;
once_again_too:
if (inp->next_addr_touse == NULL) {
inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list);
resettotop = 1;
}
/* ok, what about an acceptable address in the inp */
for (laddr = inp->next_addr_touse; laddr;
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
if (laddr->ifa == NULL) {
/* address has been removed */
continue;
}
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
/* address is being deleted */
continue;
}
sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
if (resettotop == 0) {
inp->next_addr_touse = NULL;
goto once_again_too;
}
/*
* no address bound can be a source for the destination we are in
* trouble
*/
return (NULL);
}
static struct sctp_ifa *
sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
sctp_route_t * ro,
uint32_t vrf_id,
uint8_t dest_is_priv,
uint8_t dest_is_loop,
int non_asoc_addr_ok,
sa_family_t fam)
{
struct sctp_laddr *laddr, *starting_point;
void *ifn;
struct sctp_ifn *sctp_ifn;
struct sctp_ifa *sctp_ifa, *sifa;
uint8_t start_at_beginning = 0;
struct sctp_vrf *vrf;
uint32_t ifn_index;
/*
* first question, is the ifn we will emit on in our list, if so, we
* want that one.
*/
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL)
return (NULL);
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
sctp_ifn = sctp_find_ifn(ifn, ifn_index);
/*
* first question, is the ifn we will emit on in our list? If so,
* we want that one. First we look for a preferred. Second, we go
* for an acceptable.
*/
if (sctp_ifn) {
/* first try for a preferred address on the ep */
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
continue;
if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam);
if (sifa == NULL)
continue;
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
/* on the no-no list */
continue;
}
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
}
/* next try for an acceptable address on the ep */
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0))
continue;
if (sctp_is_addr_in_ep(inp, sctp_ifa)) {
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam);
if (sifa == NULL)
continue;
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
/* on the no-no list */
continue;
}
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
}
}
/*
* if we can't find one like that then we must look at all addresses
* bound to pick one at first preferable then secondly acceptable.
*/
starting_point = stcb->asoc.last_used_address;
sctp_from_the_top:
if (stcb->asoc.last_used_address == NULL) {
start_at_beginning = 1;
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
}
/* search beginning with the last used address */
for (laddr = stcb->asoc.last_used_address; laddr;
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
if (laddr->ifa == NULL) {
/* address has been removed */
continue;
}
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
/* address is being deleted */
continue;
}
sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam);
if (sifa == NULL)
continue;
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
/* on the no-no list */
continue;
}
stcb->asoc.last_used_address = laddr;
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
if (start_at_beginning == 0) {
stcb->asoc.last_used_address = NULL;
goto sctp_from_the_top;
}
/* now try for any higher scope than the destination */
stcb->asoc.last_used_address = starting_point;
start_at_beginning = 0;
sctp_from_the_top2:
if (stcb->asoc.last_used_address == NULL) {
start_at_beginning = 1;
stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list);
}
/* search beginning with the last used address */
for (laddr = stcb->asoc.last_used_address; laddr;
laddr = LIST_NEXT(laddr, sctp_nxt_addr)) {
if (laddr->ifa == NULL) {
/* address has been removed */
continue;
}
if (laddr->action == SCTP_DEL_IP_ADDRESS) {
/* address is being deleted */
continue;
}
sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
/* on the no-no list */
continue;
}
stcb->asoc.last_used_address = laddr;
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
if (start_at_beginning == 0) {
stcb->asoc.last_used_address = NULL;
goto sctp_from_the_top2;
}
return (NULL);
}
static struct sctp_ifa *
sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn,
struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
int non_asoc_addr_ok,
uint8_t dest_is_loop,
uint8_t dest_is_priv,
int addr_wanted,
sa_family_t fam,
sctp_route_t * ro
)
{
struct sctp_ifa *ifa, *sifa;
int num_eligible_addr = 0;
#ifdef INET6
struct sockaddr_in6 sin6, lsa6;
if (fam == AF_INET6) {
memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6));
(void)sa6_recoverscope(&sin6);
}
#endif /* INET6 */
LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
#ifdef INET
if ((ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0))
continue;
sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
#ifdef INET6
if (fam == AF_INET6 &&
dest_is_loop &&
sifa->src_is_loop && sifa->src_is_priv) {
/*
* don't allow fe80::1 to be a src on loop ::1, we
* don't list it to the peer so we will get an
* abort.
*/
continue;
}
if (fam == AF_INET6 &&
IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) &&
IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
/*
* link-local <-> link-local must belong to the same
* scope.
*/
memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6));
(void)sa6_recoverscope(&lsa6);
if (sin6.sin6_scope_id != lsa6.sin6_scope_id) {
continue;
}
}
#endif /* INET6 */
/*
* Check if the IPv6 address matches to next-hop. In the
* mobile case, old IPv6 address may be not deleted from the
* interface. Then, the interface has previous and new
* addresses. We should use one corresponding to the
* next-hop. (by micchie)
*/
#ifdef INET6
if (stcb && fam == AF_INET6 &&
sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro)
== 0) {
continue;
}
}
#endif
#ifdef INET
/* Avoid topologically incorrect IPv4 address */
if (stcb && fam == AF_INET &&
sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) {
if (sctp_v4src_match_nexthop(sifa, ro) == 0) {
continue;
}
}
#endif
if (stcb) {
if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
/*
* It is restricted for some reason..
* probably not yet added.
*/
continue;
}
}
if (num_eligible_addr >= addr_wanted) {
return (sifa);
}
num_eligible_addr++;
}
return (NULL);
}
static int
sctp_count_num_preferred_boundall(struct sctp_ifn *ifn,
struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
int non_asoc_addr_ok,
uint8_t dest_is_loop,
uint8_t dest_is_priv,
sa_family_t fam)
{
struct sctp_ifa *ifa, *sifa;
int num_eligible_addr = 0;
LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) {
#ifdef INET
if ((ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((ifa->address.sa.sa_family == AF_INET6) &&
(stcb != NULL) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0)) {
continue;
}
sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL) {
continue;
}
if (stcb) {
if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) {
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
/*
* It is restricted for some reason..
* probably not yet added.
*/
continue;
}
}
num_eligible_addr++;
}
return (num_eligible_addr);
}
static struct sctp_ifa *
sctp_choose_boundall(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_nets *net,
sctp_route_t * ro,
uint32_t vrf_id,
uint8_t dest_is_priv,
uint8_t dest_is_loop,
int non_asoc_addr_ok,
sa_family_t fam)
{
int cur_addr_num = 0, num_preferred = 0;
void *ifn;
struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn;
struct sctp_ifa *sctp_ifa, *sifa;
uint32_t ifn_index;
struct sctp_vrf *vrf;
#ifdef INET
int retried = 0;
#endif
/*-
* For boundall we can use any address in the association.
* If non_asoc_addr_ok is set we can use any address (at least in
* theory). So we look for preferred addresses first. If we find one,
* we use it. Otherwise we next try to get an address on the
* interface, which we should be able to do (unless non_asoc_addr_ok
* is false and we are routed out that way). In these cases where we
* can't use the address of the interface we go through all the
* ifn's looking for an address we can use and fill that in. Punting
* means we send back address 0, which will probably cause problems
* actually since then IP will fill in the address of the route ifn,
* which means we probably already rejected it.. i.e. here comes an
* abort :-<.
*/
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL)
return (NULL);
ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index);
emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index);
if (sctp_ifn == NULL) {
/* ?? We don't have this guy ?? */
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n");
goto bound_all_plan_b;
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n",
ifn_index, sctp_ifn->ifn_name);
if (net) {
cur_addr_num = net->indx_of_eligible_next_to_use;
}
num_preferred = sctp_count_num_preferred_boundall(sctp_ifn,
inp, stcb,
non_asoc_addr_ok,
dest_is_loop,
dest_is_priv, fam);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n",
num_preferred, sctp_ifn->ifn_name);
if (num_preferred == 0) {
/*
* no eligible addresses, we must use some other interface
* address if we can find one.
*/
goto bound_all_plan_b;
}
/*
* Ok we have num_eligible_addr set with how many we can use, this
* may vary from call to call due to addresses being deprecated
* etc..
*/
if (cur_addr_num >= num_preferred) {
cur_addr_num = 0;
}
/*
* select the nth address from the list (where cur_addr_num is the
* nth) and 0 is the first one, 1 is the second one etc...
*/
SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num);
sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
dest_is_priv, cur_addr_num, fam, ro);
/* if sctp_ifa is NULL something changed??, fall to plan b. */
if (sctp_ifa) {
atomic_add_int(&sctp_ifa->refcount, 1);
if (net) {
/* save off where the next one we will want */
net->indx_of_eligible_next_to_use = cur_addr_num + 1;
}
return (sctp_ifa);
}
/*
* plan_b: Look at all interfaces and find a preferred address. If
* no preferred fall through to plan_c.
*/
bound_all_plan_b:
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n");
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n",
sctp_ifn->ifn_name);
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
/* wrong base scope */
SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n");
continue;
}
if ((sctp_ifn == looked_at) && looked_at) {
/* already looked at this guy */
SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n");
continue;
}
num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok,
dest_is_loop, dest_is_priv, fam);
SCTPDBG(SCTP_DEBUG_OUTPUT2,
"Found ifn:%p %d preferred source addresses\n",
ifn, num_preferred);
if (num_preferred == 0) {
/* None on this interface. */
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n");
continue;
}
SCTPDBG(SCTP_DEBUG_OUTPUT2,
"num preferred:%d on interface:%p cur_addr_num:%d\n",
num_preferred, (void *)sctp_ifn, cur_addr_num);
/*
* Ok we have num_eligible_addr set with how many we can
* use, this may vary from call to call due to addresses
* being deprecated etc..
*/
if (cur_addr_num >= num_preferred) {
cur_addr_num = 0;
}
sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop,
dest_is_priv, cur_addr_num, fam, ro);
if (sifa == NULL)
continue;
if (net) {
net->indx_of_eligible_next_to_use = cur_addr_num + 1;
SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n",
cur_addr_num);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa);
}
atomic_add_int(&sifa->refcount, 1);
return (sifa);
}
#ifdef INET
again_with_private_addresses_allowed:
#endif
/* plan_c: do we have an acceptable address on the emit interface */
sifa = NULL;
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n");
if (emit_ifn == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n");
goto plan_d;
}
LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa);
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n");
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0)) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n");
continue;
}
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n");
continue;
}
if (stcb) {
if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n");
sifa = NULL;
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
/*
* It is restricted for some reason..
* probably not yet added.
*/
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n");
sifa = NULL;
continue;
}
}
atomic_add_int(&sifa->refcount, 1);
goto out;
}
plan_d:
/*
* plan_d: We are in trouble. No preferred address on the emit
* interface. And not even a preferred address on all interfaces. Go
* out and see if we can find an acceptable address somewhere
* amongst all interfaces.
*/
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at);
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
/* wrong base scope */
continue;
}
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0))
continue;
sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
dest_is_loop,
dest_is_priv, fam);
if (sifa == NULL)
continue;
if (stcb) {
if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) {
sifa = NULL;
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, sifa)) &&
(!sctp_is_addr_pending(stcb, sifa)))) {
/*
* It is restricted for some
* reason.. probably not yet added.
*/
sifa = NULL;
continue;
}
}
goto out;
}
}
#ifdef INET
if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) {
stcb->asoc.scope.ipv4_local_scope = 1;
retried = 1;
goto again_with_private_addresses_allowed;
} else if (retried == 1) {
stcb->asoc.scope.ipv4_local_scope = 0;
}
#endif
out:
#ifdef INET
if (sifa) {
if (retried == 1) {
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
/* wrong base scope */
continue;
}
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
struct sctp_ifa *tmp_sifa;
#ifdef INET
if ((sctp_ifa->address.sa.sa_family == AF_INET) &&
(prison_check_ip4(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin.sin_addr) != 0)) {
continue;
}
#endif
#ifdef INET6
if ((sctp_ifa->address.sa.sa_family == AF_INET6) &&
(prison_check_ip6(inp->ip_inp.inp.inp_cred,
&sctp_ifa->address.sin6.sin6_addr) != 0)) {
continue;
}
#endif
if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) &&
(non_asoc_addr_ok == 0))
continue;
tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa,
dest_is_loop,
dest_is_priv, fam);
if (tmp_sifa == NULL) {
continue;
}
if (tmp_sifa == sifa) {
continue;
}
if (stcb) {
if (sctp_is_address_in_scope(tmp_sifa,
&stcb->asoc.scope, 0) == 0) {
continue;
}
if (((non_asoc_addr_ok == 0) &&
(sctp_is_addr_restricted(stcb, tmp_sifa))) ||
(non_asoc_addr_ok &&
(sctp_is_addr_restricted(stcb, tmp_sifa)) &&
(!sctp_is_addr_pending(stcb, tmp_sifa)))) {
/*
* It is restricted
* for some reason..
* probably not yet
* added.
*/
continue;
}
}
if ((tmp_sifa->address.sin.sin_family == AF_INET) &&
(IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) {
sctp_add_local_addr_restricted(stcb, tmp_sifa);
}
}
}
}
atomic_add_int(&sifa->refcount, 1);
}
#endif
return (sifa);
}
/* tcb may be NULL */
struct sctp_ifa *
sctp_source_address_selection(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
sctp_route_t * ro,
struct sctp_nets *net,
int non_asoc_addr_ok, uint32_t vrf_id)
{
struct sctp_ifa *answer;
uint8_t dest_is_priv, dest_is_loop;
sa_family_t fam;
#ifdef INET
struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst;
#endif
#ifdef INET6
struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst;
#endif
/**
* Rules: - Find the route if needed, cache if I can. - Look at
* interface address in route, Is it in the bound list. If so we
* have the best source. - If not we must rotate amongst the
* addresses.
*
* Cavets and issues
*
* Do we need to pay attention to scope. We can have a private address
* or a global address we are sourcing or sending to. So if we draw
* it out
* zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
* For V4
* ------------------------------------------
* source * dest * result
* -----------------------------------------
* <a> Private * Global * NAT
* -----------------------------------------
* <b> Private * Private * No problem
* -----------------------------------------
* <c> Global * Private * Huh, How will this work?
* -----------------------------------------
* <d> Global * Global * No Problem
*------------------------------------------
* zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
* For V6
*------------------------------------------
* source * dest * result
* -----------------------------------------
* <a> Linklocal * Global *
* -----------------------------------------
* <b> Linklocal * Linklocal * No problem
* -----------------------------------------
* <c> Global * Linklocal * Huh, How will this work?
* -----------------------------------------
* <d> Global * Global * No Problem
*------------------------------------------
* zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
*
* And then we add to that what happens if there are multiple addresses
* assigned to an interface. Remember the ifa on a ifn is a linked
* list of addresses. So one interface can have more than one IP
* address. What happens if we have both a private and a global
* address? Do we then use context of destination to sort out which
* one is best? And what about NAT's sending P->G may get you a NAT
* translation, or should you select the G thats on the interface in
* preference.
*
* Decisions:
*
* - count the number of addresses on the interface.
* - if it is one, no problem except case <c>.
* For <a> we will assume a NAT out there.
* - if there are more than one, then we need to worry about scope P
* or G. We should prefer G -> G and P -> P if possible.
* Then as a secondary fall back to mixed types G->P being a last
* ditch one.
* - The above all works for bound all, but bound specific we need to
* use the same concept but instead only consider the bound
* addresses. If the bound set is NOT assigned to the interface then
* we must use rotation amongst the bound addresses..
*/
if (ro->ro_rt == NULL) {
/*
* Need a route to cache.
*/
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
}
if (ro->ro_rt == NULL) {
return (NULL);
}
fam = ro->ro_dst.sa_family;
dest_is_priv = dest_is_loop = 0;
/* Setup our scopes for the destination */
switch (fam) {
#ifdef INET
case AF_INET:
/* Scope based on outbound address */
if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) {
dest_is_loop = 1;
if (net != NULL) {
/* mark it as local */
net->addr_is_local = 1;
}
} else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) {
dest_is_priv = 1;
}
break;
#endif
#ifdef INET6
case AF_INET6:
/* Scope based on outbound address */
if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) ||
SCTP_ROUTE_IS_REAL_LOOP(ro)) {
/*
* If the address is a loopback address, which
* consists of "::1" OR "fe80::1%lo0", we are
* loopback scope. But we don't use dest_is_priv
* (link local addresses).
*/
dest_is_loop = 1;
if (net != NULL) {
/* mark it as local */
net->addr_is_local = 1;
}
} else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) {
dest_is_priv = 1;
}
break;
#endif
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst);
SCTP_IPI_ADDR_RLOCK();
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
/*
* Bound all case
*/
answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id,
dest_is_priv, dest_is_loop,
non_asoc_addr_ok, fam);
SCTP_IPI_ADDR_RUNLOCK();
return (answer);
}
/*
* Subset bound case
*/
if (stcb) {
answer = sctp_choose_boundspecific_stcb(inp, stcb, ro,
vrf_id, dest_is_priv,
dest_is_loop,
non_asoc_addr_ok, fam);
} else {
answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id,
non_asoc_addr_ok,
dest_is_priv,
dest_is_loop, fam);
}
SCTP_IPI_ADDR_RUNLOCK();
return (answer);
}
static int
sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize)
{
struct cmsghdr cmh;
int tlen, at, found;
struct sctp_sndinfo sndinfo;
struct sctp_prinfo prinfo;
struct sctp_authinfo authinfo;
tlen = SCTP_BUF_LEN(control);
at = 0;
found = 0;
/*
* Independent of how many mbufs, find the c_type inside the control
* structure and copy out the data.
*/
while (at < tlen) {
if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
/* There is not enough room for one more. */
return (found);
}
m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
/* We dont't have a complete CMSG header. */
return (found);
}
if (((int)cmh.cmsg_len + at) > tlen) {
/* We don't have the complete CMSG. */
return (found);
}
if ((cmh.cmsg_level == IPPROTO_SCTP) &&
((c_type == cmh.cmsg_type) ||
((c_type == SCTP_SNDRCV) &&
((cmh.cmsg_type == SCTP_SNDINFO) ||
(cmh.cmsg_type == SCTP_PRINFO) ||
(cmh.cmsg_type == SCTP_AUTHINFO))))) {
if (c_type == cmh.cmsg_type) {
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) {
return (found);
}
/* It is exactly what we want. Copy it out. */
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data);
return (1);
} else {
struct sctp_sndrcvinfo *sndrcvinfo;
sndrcvinfo = (struct sctp_sndrcvinfo *)data;
if (found == 0) {
if (cpsize < sizeof(struct sctp_sndrcvinfo)) {
return (found);
}
memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo));
}
switch (cmh.cmsg_type) {
case SCTP_SNDINFO:
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) {
return (found);
}
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo);
sndrcvinfo->sinfo_stream = sndinfo.snd_sid;
sndrcvinfo->sinfo_flags = sndinfo.snd_flags;
sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid;
sndrcvinfo->sinfo_context = sndinfo.snd_context;
sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id;
break;
case SCTP_PRINFO:
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) {
return (found);
}
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo);
if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) {
sndrcvinfo->sinfo_timetolive = prinfo.pr_value;
} else {
sndrcvinfo->sinfo_timetolive = 0;
}
sndrcvinfo->sinfo_flags |= prinfo.pr_policy;
break;
case SCTP_AUTHINFO:
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) {
return (found);
}
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo);
sndrcvinfo->sinfo_keynumber_valid = 1;
sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber;
break;
default:
return (found);
}
found = 1;
}
}
at += CMSG_ALIGN(cmh.cmsg_len);
}
return (found);
}
static int
sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error)
{
struct cmsghdr cmh;
int tlen, at;
struct sctp_initmsg initmsg;
#ifdef INET
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
tlen = SCTP_BUF_LEN(control);
at = 0;
while (at < tlen) {
if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
/* There is not enough room for one more. */
*error = EINVAL;
return (1);
}
m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
/* We dont't have a complete CMSG header. */
*error = EINVAL;
return (1);
}
if (((int)cmh.cmsg_len + at) > tlen) {
/* We don't have the complete CMSG. */
*error = EINVAL;
return (1);
}
if (cmh.cmsg_level == IPPROTO_SCTP) {
switch (cmh.cmsg_type) {
case SCTP_INIT:
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) {
*error = EINVAL;
return (1);
}
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg);
if (initmsg.sinit_max_attempts)
stcb->asoc.max_init_times = initmsg.sinit_max_attempts;
if (initmsg.sinit_num_ostreams)
stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams;
if (initmsg.sinit_max_instreams)
stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams;
if (initmsg.sinit_max_init_timeo)
stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo;
if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) {
struct sctp_stream_out *tmp_str;
unsigned int i;
#if defined(SCTP_DETAILED_STR_STATS)
int j;
#endif
/* Default is NOT correct */
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n",
stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams);
SCTP_TCB_UNLOCK(stcb);
SCTP_MALLOC(tmp_str,
struct sctp_stream_out *,
(stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)),
SCTP_M_STRMO);
SCTP_TCB_LOCK(stcb);
if (tmp_str != NULL) {
SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO);
stcb->asoc.strmout = tmp_str;
stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams;
} else {
stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt;
}
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
stcb->asoc.strmout[i].chunks_on_queues = 0;
stcb->asoc.strmout[i].next_sequence_send = 0;
#if defined(SCTP_DETAILED_STR_STATS)
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
stcb->asoc.strmout[i].abandoned_sent[j] = 0;
stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
}
#else
stcb->asoc.strmout[i].abandoned_sent[0] = 0;
stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
#endif
stcb->asoc.strmout[i].stream_no = i;
stcb->asoc.strmout[i].last_msg_incomplete = 0;
stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING;
stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
}
}
break;
#ifdef INET
case SCTP_DSTADDRV4:
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
*error = EINVAL;
return (1);
}
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_family = AF_INET;
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_port = stcb->rport;
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
if ((sin.sin_addr.s_addr == INADDR_ANY) ||
(sin.sin_addr.s_addr == INADDR_BROADCAST) ||
IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
*error = EINVAL;
return (1);
}
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
*error = ENOBUFS;
return (1);
}
break;
#endif
#ifdef INET6
case SCTP_DSTADDRV6:
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
*error = EINVAL;
return (1);
}
memset(&sin6, 0, sizeof(struct sockaddr_in6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_port = stcb->rport;
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) ||
IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
*error = EINVAL;
return (1);
}
#ifdef INET
if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
in6_sin6_2_sin(&sin, &sin6);
if ((sin.sin_addr.s_addr == INADDR_ANY) ||
(sin.sin_addr.s_addr == INADDR_BROADCAST) ||
IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
*error = EINVAL;
return (1);
}
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL,
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
*error = ENOBUFS;
return (1);
}
} else
#endif
if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL,
SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
*error = ENOBUFS;
return (1);
}
break;
#endif
default:
break;
}
}
at += CMSG_ALIGN(cmh.cmsg_len);
}
return (0);
}
static struct sctp_tcb *
sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p,
uint16_t port,
struct mbuf *control,
struct sctp_nets **net_p,
int *error)
{
struct cmsghdr cmh;
int tlen, at;
struct sctp_tcb *stcb;
struct sockaddr *addr;
#ifdef INET
struct sockaddr_in sin;
#endif
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
tlen = SCTP_BUF_LEN(control);
at = 0;
while (at < tlen) {
if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) {
/* There is not enough room for one more. */
*error = EINVAL;
return (NULL);
}
m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh);
if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) {
/* We dont't have a complete CMSG header. */
*error = EINVAL;
return (NULL);
}
if (((int)cmh.cmsg_len + at) > tlen) {
/* We don't have the complete CMSG. */
*error = EINVAL;
return (NULL);
}
if (cmh.cmsg_level == IPPROTO_SCTP) {
switch (cmh.cmsg_type) {
#ifdef INET
case SCTP_DSTADDRV4:
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) {
*error = EINVAL;
return (NULL);
}
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_family = AF_INET;
sin.sin_len = sizeof(struct sockaddr_in);
sin.sin_port = port;
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr);
addr = (struct sockaddr *)&sin;
break;
#endif
#ifdef INET6
case SCTP_DSTADDRV6:
if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) {
*error = EINVAL;
return (NULL);
}
memset(&sin6, 0, sizeof(struct sockaddr_in6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_port = port;
m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr);
#ifdef INET
if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) {
in6_sin6_2_sin(&sin, &sin6);
addr = (struct sockaddr *)&sin;
} else
#endif
addr = (struct sockaddr *)&sin6;
break;
#endif
default:
addr = NULL;
break;
}
if (addr) {
stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL);
if (stcb != NULL) {
return (stcb);
}
}
}
at += CMSG_ALIGN(cmh.cmsg_len);
}
return (NULL);
}
static struct mbuf *
sctp_add_cookie(struct mbuf *init, int init_offset,
struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature)
{
struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret;
struct sctp_state_cookie *stc;
struct sctp_paramhdr *ph;
uint8_t *foo;
int sig_offset;
uint16_t cookie_sz;
mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) +
sizeof(struct sctp_paramhdr)), 0,
M_NOWAIT, 1, MT_DATA);
if (mret == NULL) {
return (NULL);
}
copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT);
if (copy_init == NULL) {
sctp_m_freem(mret);
return (NULL);
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY);
}
#endif
copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL,
M_NOWAIT);
if (copy_initack == NULL) {
sctp_m_freem(mret);
sctp_m_freem(copy_init);
return (NULL);
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY);
}
#endif
/* easy side we just drop it on the end */
ph = mtod(mret, struct sctp_paramhdr *);
SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) +
sizeof(struct sctp_paramhdr);
stc = (struct sctp_state_cookie *)((caddr_t)ph +
sizeof(struct sctp_paramhdr));
ph->param_type = htons(SCTP_STATE_COOKIE);
ph->param_length = 0; /* fill in at the end */
/* Fill in the stc cookie data */
memcpy(stc, stc_in, sizeof(struct sctp_state_cookie));
/* tack the INIT and then the INIT-ACK onto the chain */
cookie_sz = 0;
for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
cookie_sz += SCTP_BUF_LEN(m_at);
if (SCTP_BUF_NEXT(m_at) == NULL) {
SCTP_BUF_NEXT(m_at) = copy_init;
break;
}
}
for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
cookie_sz += SCTP_BUF_LEN(m_at);
if (SCTP_BUF_NEXT(m_at) == NULL) {
SCTP_BUF_NEXT(m_at) = copy_initack;
break;
}
}
for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
cookie_sz += SCTP_BUF_LEN(m_at);
if (SCTP_BUF_NEXT(m_at) == NULL) {
break;
}
}
sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA);
if (sig == NULL) {
/* no space, so free the entire chain */
sctp_m_freem(mret);
return (NULL);
}
SCTP_BUF_LEN(sig) = 0;
SCTP_BUF_NEXT(m_at) = sig;
sig_offset = 0;
foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset);
memset(foo, 0, SCTP_SIGNATURE_SIZE);
*signature = foo;
SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE;
cookie_sz += SCTP_SIGNATURE_SIZE;
ph->param_length = htons(cookie_sz);
return (mret);
}
static uint8_t
sctp_get_ect(struct sctp_tcb *stcb)
{
if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) {
return (SCTP_ECT0_BIT);
} else {
return (0);
}
}
#if defined(INET) || defined(INET6)
static void
sctp_handle_no_route(struct sctp_tcb *stcb,
struct sctp_nets *net,
int so_locked)
{
SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n");
if (net) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa);
if (net->dest_state & SCTP_ADDR_CONFIRMED) {
if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net);
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN,
stcb, 0,
(void *)net,
so_locked);
net->dest_state &= ~SCTP_ADDR_REACHABLE;
net->dest_state &= ~SCTP_ADDR_PF;
}
}
if (stcb) {
if (net == stcb->asoc.primary_destination) {
/* need a new primary */
struct sctp_nets *alt;
alt = sctp_find_alternate_net(stcb, net, 0);
if (alt != net) {
if (stcb->asoc.alternate) {
sctp_free_remote_addr(stcb->asoc.alternate);
}
stcb->asoc.alternate = alt;
atomic_add_int(&stcb->asoc.alternate->ref_count, 1);
if (net->ro._s_addr) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
}
net->src_addr_selected = 0;
}
}
}
}
}
#endif
static int
sctp_lowlevel_chunk_output(struct sctp_inpcb *inp,
struct sctp_tcb *stcb, /* may be NULL */
struct sctp_nets *net,
struct sockaddr *to,
struct mbuf *m,
uint32_t auth_offset,
struct sctp_auth_chunk *auth,
uint16_t auth_keyid,
int nofragment_flag,
int ecn_ok,
int out_of_asoc_ok,
uint16_t src_port,
uint16_t dest_port,
uint32_t v_tag,
uint16_t port,
union sctp_sockstore *over_addr,
uint8_t mflowtype, uint32_t mflowid,
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
int so_locked SCTP_UNUSED
#else
int so_locked
#endif
)
/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */
{
/**
* Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header
* WITH an SCTPHDR but no IP header, endpoint inp and sa structure:
* - fill in the HMAC digest of any AUTH chunk in the packet.
* - calculate and fill in the SCTP checksum.
* - prepend an IP address header.
* - if boundall use INADDR_ANY.
* - if boundspecific do source address selection.
* - set fragmentation option for ipV4.
* - On return from IP output, check/adjust mtu size of output
* interface and smallest_mtu size as well.
*/
/* Will need ifdefs around this */
struct mbuf *newm;
struct sctphdr *sctphdr;
int packet_length;
int ret;
#if defined(INET) || defined(INET6)
uint32_t vrf_id;
#endif
#if defined(INET) || defined(INET6)
struct mbuf *o_pak;
sctp_route_t *ro = NULL;
struct udphdr *udp = NULL;
#endif
uint8_t tos_value;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so = NULL;
#endif
if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
sctp_m_freem(m);
return (EFAULT);
}
#if defined(INET) || defined(INET6)
if (stcb) {
vrf_id = stcb->asoc.vrf_id;
} else {
vrf_id = inp->def_vrf_id;
}
#endif
/* fill in the HMAC digest for any AUTH chunk in the packet */
if ((auth != NULL) && (stcb != NULL)) {
sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid);
}
if (net) {
tos_value = net->dscp;
} else if (stcb) {
tos_value = stcb->asoc.default_dscp;
} else {
tos_value = inp->sctp_ep.default_dscp;
}
switch (to->sa_family) {
#ifdef INET
case AF_INET:
{
struct ip *ip = NULL;
sctp_route_t iproute;
int len;
len = SCTP_MIN_V4_OVERHEAD;
if (port) {
len += sizeof(struct udphdr);
}
newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
if (newm == NULL) {
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_ALIGN_TO_END(newm, len);
SCTP_BUF_LEN(newm) = len;
SCTP_BUF_NEXT(newm) = m;
m = newm;
if (net != NULL) {
m->m_pkthdr.flowid = net->flowid;
M_HASHTYPE_SET(m, net->flowtype);
} else {
m->m_pkthdr.flowid = mflowid;
M_HASHTYPE_SET(m, mflowtype);
}
packet_length = sctp_calculate_len(m);
ip = mtod(m, struct ip *);
ip->ip_v = IPVERSION;
ip->ip_hl = (sizeof(struct ip) >> 2);
if (tos_value == 0) {
/*
* This means especially, that it is not set
* at the SCTP layer. So use the value from
* the IP layer.
*/
tos_value = inp->ip_inp.inp.inp_ip_tos;
}
tos_value &= 0xfc;
if (ecn_ok) {
tos_value |= sctp_get_ect(stcb);
}
if ((nofragment_flag) && (port == 0)) {
ip->ip_off = htons(IP_DF);
} else {
ip->ip_off = htons(0);
}
/* FreeBSD has a function for ip_id's */
ip->ip_id = ip_newid();
ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl;
ip->ip_len = htons(packet_length);
ip->ip_tos = tos_value;
if (port) {
ip->ip_p = IPPROTO_UDP;
} else {
ip->ip_p = IPPROTO_SCTP;
}
ip->ip_sum = 0;
if (net == NULL) {
ro = &iproute;
memset(&iproute, 0, sizeof(iproute));
memcpy(&ro->ro_dst, to, to->sa_len);
} else {
ro = (sctp_route_t *) & net->ro;
}
/* Now the address selection part */
ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr;
/* call the routine to select the src address */
if (net && out_of_asoc_ok == 0) {
if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
net->src_addr_selected = 0;
if (ro->ro_rt) {
RTFREE(ro->ro_rt);
ro->ro_rt = NULL;
}
}
if (net->src_addr_selected == 0) {
/* Cache the source address */
net->ro._s_addr = sctp_source_address_selection(inp, stcb,
ro, net, 0,
vrf_id);
net->src_addr_selected = 1;
}
if (net->ro._s_addr == NULL) {
/* No route to host */
net->src_addr_selected = 0;
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
ip->ip_src = net->ro._s_addr->address.sin.sin_addr;
} else {
if (over_addr == NULL) {
struct sctp_ifa *_lsrc;
_lsrc = sctp_source_address_selection(inp, stcb, ro,
net,
out_of_asoc_ok,
vrf_id);
if (_lsrc == NULL) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
ip->ip_src = _lsrc->address.sin.sin_addr;
sctp_free_ifa(_lsrc);
} else {
ip->ip_src = over_addr->sin.sin_addr;
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
}
}
if (port) {
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip));
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
udp->uh_dport = port;
udp->uh_ulen = htons(packet_length - sizeof(struct ip));
if (V_udp_cksum) {
udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
} else {
udp->uh_sum = 0;
}
sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
} else {
sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip));
}
sctphdr->src_port = src_port;
sctphdr->dest_port = dest_port;
sctphdr->v_tag = v_tag;
sctphdr->checksum = 0;
/*
* If source address selection fails and we find no
* route then the ip_output should fail as well with
* a NO_ROUTE_TO_HOST type error. We probably should
* catch that somewhere and abort the association
* right away (assuming this is an INIT being sent).
*/
if (ro->ro_rt == NULL) {
/*
* src addr selection failed to find a route
* (or valid source addr), so we can't get
* there from here (yet)!
*/
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
if (ro != &iproute) {
memcpy(&iproute, ro, sizeof(*ro));
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n",
(uint32_t) (ntohl(ip->ip_src.s_addr)));
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n",
(uint32_t) (ntohl(ip->ip_dst.s_addr)));
SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n",
(void *)ro->ro_rt);
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
/* failed to prepend data, give up */
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
sctp_m_freem(m);
return (ENOMEM);
}
SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
if (port) {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
#else
sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
#endif
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
#else
m->m_pkthdr.csum_flags = CSUM_SCTP;
m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
#endif
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
sctp_packet_log(o_pak);
#endif
/* send it out. table id is taken from stcb */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
so = SCTP_INP_SO(inp);
SCTP_SOCKET_UNLOCK(so, 0);
}
#endif
SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 0);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
#endif
SCTP_STAT_INCR(sctps_sendpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
if (ret)
SCTP_STAT_INCR(sctps_senderrors);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret);
if (net == NULL) {
/* free tempy routes */
RO_RTFREE(ro);
} else {
/*
* PMTU check versus smallest asoc MTU goes
* here
*/
if ((ro->ro_rt != NULL) &&
(net->ro._s_addr)) {
uint32_t mtu;
mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
if (net->port) {
mtu -= sizeof(struct udphdr);
}
if (mtu && (stcb->asoc.smallest_mtu > mtu)) {
sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
net->mtu = mtu;
}
} else if (ro->ro_rt == NULL) {
/* route was freed */
if (net->ro._s_addr &&
net->src_addr_selected) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
}
net->src_addr_selected = 0;
}
}
return (ret);
}
#endif
#ifdef INET6
case AF_INET6:
{
uint32_t flowlabel, flowinfo;
struct ip6_hdr *ip6h;
struct route_in6 ip6route;
struct ifnet *ifp;
struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp;
int prev_scope = 0;
struct sockaddr_in6 lsa6_storage;
int error;
u_short prev_port = 0;
int len;
if (net) {
flowlabel = net->flowlabel;
} else if (stcb) {
flowlabel = stcb->asoc.default_flowlabel;
} else {
flowlabel = inp->sctp_ep.default_flowlabel;
}
if (flowlabel == 0) {
/*
* This means especially, that it is not set
* at the SCTP layer. So use the value from
* the IP layer.
*/
flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo);
}
flowlabel &= 0x000fffff;
len = SCTP_MIN_OVERHEAD;
if (port) {
len += sizeof(struct udphdr);
}
newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA);
if (newm == NULL) {
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_ALIGN_TO_END(newm, len);
SCTP_BUF_LEN(newm) = len;
SCTP_BUF_NEXT(newm) = m;
m = newm;
if (net != NULL) {
m->m_pkthdr.flowid = net->flowid;
M_HASHTYPE_SET(m, net->flowtype);
} else {
m->m_pkthdr.flowid = mflowid;
M_HASHTYPE_SET(m, mflowtype);
}
packet_length = sctp_calculate_len(m);
ip6h = mtod(m, struct ip6_hdr *);
/* protect *sin6 from overwrite */
sin6 = (struct sockaddr_in6 *)to;
tmp = *sin6;
sin6 = &tmp;
/* KAME hack: embed scopeid */
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
if (net == NULL) {
memset(&ip6route, 0, sizeof(ip6route));
ro = (sctp_route_t *) & ip6route;
memcpy(&ro->ro_dst, sin6, sin6->sin6_len);
} else {
ro = (sctp_route_t *) & net->ro;
}
/*
* We assume here that inp_flow is in host byte
* order within the TCB!
*/
if (tos_value == 0) {
/*
* This means especially, that it is not set
* at the SCTP layer. So use the value from
* the IP layer.
*/
tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff;
}
tos_value &= 0xfc;
if (ecn_ok) {
tos_value |= sctp_get_ect(stcb);
}
flowinfo = 0x06;
flowinfo <<= 8;
flowinfo |= tos_value;
flowinfo <<= 20;
flowinfo |= flowlabel;
ip6h->ip6_flow = htonl(flowinfo);
if (port) {
ip6h->ip6_nxt = IPPROTO_UDP;
} else {
ip6h->ip6_nxt = IPPROTO_SCTP;
}
ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr));
ip6h->ip6_dst = sin6->sin6_addr;
/*
* Add SRC address selection here: we can only reuse
* to a limited degree the kame src-addr-sel, since
* we can try their selection but it may not be
* bound.
*/
bzero(&lsa6_tmp, sizeof(lsa6_tmp));
lsa6_tmp.sin6_family = AF_INET6;
lsa6_tmp.sin6_len = sizeof(lsa6_tmp);
lsa6 = &lsa6_tmp;
if (net && out_of_asoc_ok == 0) {
if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
net->src_addr_selected = 0;
if (ro->ro_rt) {
RTFREE(ro->ro_rt);
ro->ro_rt = NULL;
}
}
if (net->src_addr_selected == 0) {
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
/* KAME hack: embed scopeid */
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
/* Cache the source address */
net->ro._s_addr = sctp_source_address_selection(inp,
stcb,
ro,
net,
0,
vrf_id);
(void)sa6_recoverscope(sin6);
net->src_addr_selected = 1;
}
if (net->ro._s_addr == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n");
net->src_addr_selected = 0;
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr;
} else {
sin6 = (struct sockaddr_in6 *)&ro->ro_dst;
/* KAME hack: embed scopeid */
if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
if (over_addr == NULL) {
struct sctp_ifa *_lsrc;
_lsrc = sctp_source_address_selection(inp, stcb, ro,
net,
out_of_asoc_ok,
vrf_id);
if (_lsrc == NULL) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr;
sctp_free_ifa(_lsrc);
} else {
lsa6->sin6_addr = over_addr->sin6.sin6_addr;
SCTP_RTALLOC(ro, vrf_id, inp->fibnum);
}
(void)sa6_recoverscope(sin6);
}
lsa6->sin6_port = inp->sctp_lport;
if (ro->ro_rt == NULL) {
/*
* src addr selection failed to find a route
* (or valid source addr), so we can't get
* there from here!
*/
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
/*
* XXX: sa6 may not have a valid sin6_scope_id in
* the non-SCOPEDROUTING case.
*/
bzero(&lsa6_storage, sizeof(lsa6_storage));
lsa6_storage.sin6_family = AF_INET6;
lsa6_storage.sin6_len = sizeof(lsa6_storage);
lsa6_storage.sin6_addr = lsa6->sin6_addr;
if ((error = sa6_recoverscope(&lsa6_storage)) != 0) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error);
sctp_m_freem(m);
return (error);
}
/* XXX */
lsa6_storage.sin6_addr = lsa6->sin6_addr;
lsa6_storage.sin6_port = inp->sctp_lport;
lsa6 = &lsa6_storage;
ip6h->ip6_src = lsa6->sin6_addr;
if (port) {
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
sctp_handle_no_route(stcb, net, so_locked);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH);
sctp_m_freem(m);
return (EHOSTUNREACH);
}
udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
udp->uh_dport = port;
udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr));
udp->uh_sum = 0;
sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr));
} else {
sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr));
}
sctphdr->src_port = src_port;
sctphdr->dest_port = dest_port;
sctphdr->v_tag = v_tag;
sctphdr->checksum = 0;
/*
* We set the hop limit now since there is a good
* chance that our ro pointer is now filled
*/
ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro);
ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro);
#ifdef SCTP_DEBUG
/* Copy to be sure something bad is not happening */
sin6->sin6_addr = ip6h->ip6_dst;
lsa6->sin6_addr = ip6h->ip6_src;
#endif
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n");
SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6);
SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6);
if (net) {
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
/*
* preserve the port and scope for link
* local send
*/
prev_scope = sin6->sin6_scope_id;
prev_port = sin6->sin6_port;
}
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
/* failed to prepend data, give up */
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_ATTACH_CHAIN(o_pak, m, packet_length);
if (port) {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
#else
sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
#endif
if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) {
udp->uh_sum = 0xffff;
}
} else {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
#else
m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
#endif
}
/* send it out. table id is taken from stcb */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
so = SCTP_INP_SO(inp);
SCTP_SOCKET_UNLOCK(so, 0);
}
#endif
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING)
sctp_packet_log(o_pak);
#endif
SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 0);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
#endif
if (net) {
/* for link local this must be done */
sin6->sin6_scope_id = prev_scope;
sin6->sin6_port = prev_port;
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret);
SCTP_STAT_INCR(sctps_sendpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
if (ret) {
SCTP_STAT_INCR(sctps_senderrors);
}
if (net == NULL) {
/* Now if we had a temp route free it */
RO_RTFREE(ro);
} else {
/*
* PMTU check versus smallest asoc MTU goes
* here
*/
if (ro->ro_rt == NULL) {
/* Route was freed */
if (net->ro._s_addr &&
net->src_addr_selected) {
sctp_free_ifa(net->ro._s_addr);
net->ro._s_addr = NULL;
}
net->src_addr_selected = 0;
}
if ((ro->ro_rt != NULL) &&
(net->ro._s_addr)) {
uint32_t mtu;
mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt);
if (mtu &&
(stcb->asoc.smallest_mtu > mtu)) {
sctp_mtu_size_reset(inp, &stcb->asoc, mtu);
net->mtu = mtu;
if (net->port) {
net->mtu -= sizeof(struct udphdr);
}
}
} else if (ifp) {
if (ND_IFINFO(ifp)->linkmtu &&
(stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) {
sctp_mtu_size_reset(inp,
&stcb->asoc,
ND_IFINFO(ifp)->linkmtu);
}
}
}
return (ret);
}
#endif
default:
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
((struct sockaddr *)to)->sa_family);
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
return (EFAULT);
}
}
void
sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct mbuf *m, *m_last;
struct sctp_nets *net;
struct sctp_init_chunk *init;
struct sctp_supported_addr_param *sup_addr;
struct sctp_adaptation_layer_indication *ali;
struct sctp_supported_chunk_types_param *pr_supported;
struct sctp_paramhdr *ph;
int cnt_inits_to = 0;
int ret;
uint16_t num_ext, chunk_len, padding_len, parameter_len;
/* INIT's always go to the primary (and usually ONLY address) */
net = stcb->asoc.primary_destination;
if (net == NULL) {
net = TAILQ_FIRST(&stcb->asoc.nets);
if (net == NULL) {
/* TSNH */
return;
}
/* we confirm any address we send an INIT to */
net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
(void)sctp_set_primary_addr(stcb, NULL, net);
} else {
/* we confirm any address we send an INIT to */
net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
}
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n");
#ifdef INET6
if (net->ro._l_addr.sa.sa_family == AF_INET6) {
/*
* special hook, if we are sending to link local it will not
* show up in our private address count.
*/
if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr))
cnt_inits_to = 1;
}
#endif
if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
/* This case should not happen */
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n");
return;
}
/* start the INIT timer */
sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net);
m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA);
if (m == NULL) {
/* No memory, INIT timer will re-attempt. */
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n");
return;
}
chunk_len = (uint16_t) sizeof(struct sctp_init_chunk);
padding_len = 0;
/* Now lets put the chunk header in place */
init = mtod(m, struct sctp_init_chunk *);
/* now the chunk header */
init->ch.chunk_type = SCTP_INITIATION;
init->ch.chunk_flags = 0;
/* fill in later from mbuf we build */
init->ch.chunk_length = 0;
/* place in my tag */
init->init.initiate_tag = htonl(stcb->asoc.my_vtag);
/* set up some of the credits. */
init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0,
SCTP_MINIMAL_RWND));
init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams);
init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams);
init->init.initial_tsn = htonl(stcb->asoc.init_seq_number);
/* Adaptation layer indication parameter */
if (inp->sctp_ep.adaptation_layer_indicator_provided) {
parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
ali->ph.param_length = htons(parameter_len);
ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
chunk_len += parameter_len;
}
/* ECN parameter */
if (stcb->asoc.ecn_supported == 1) {
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_ECN_CAPABLE);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
/* PR-SCTP supported parameter */
if (stcb->asoc.prsctp_supported == 1) {
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
/* Add NAT friendly parameter. */
if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) {
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
/* And now tell the peer which extensions we support */
num_ext = 0;
pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
if (stcb->asoc.prsctp_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
}
if (stcb->asoc.auth_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
}
if (stcb->asoc.asconf_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
}
if (stcb->asoc.reconfig_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
}
if (stcb->asoc.nrsack_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
}
if (stcb->asoc.pktdrop_supported == 1) {
pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
}
if (num_ext > 0) {
parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
pr_supported->ph.param_length = htons(parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
/* add authentication parameters */
if (stcb->asoc.auth_supported) {
/* attach RANDOM parameter, if available */
if (stcb->asoc.authinfo.random != NULL) {
struct sctp_auth_random *randp;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len;
/* random key already contains the header */
memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
/* add HMAC_ALGO parameter */
if (stcb->asoc.local_hmacs != NULL) {
struct sctp_auth_hmac_algo *hmacs;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) +
stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t));
hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
hmacs->ph.param_length = htons(parameter_len);
sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
/* add CHUNKS parameter */
if (stcb->asoc.local_auth_chunks != NULL) {
struct sctp_auth_chunk_list *chunks;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) +
sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks));
chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
chunks->ph.param_length = htons(parameter_len);
sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
}
/* now any cookie time extensions */
if (stcb->asoc.cookie_preserve_req) {
struct sctp_cookie_perserve_param *cookie_preserve;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param);
cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len);
cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE);
cookie_preserve->ph.param_length = htons(parameter_len);
cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req);
stcb->asoc.cookie_preserve_req = 0;
chunk_len += parameter_len;
}
if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) {
uint8_t i;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
if (stcb->asoc.scope.ipv4_addr_legal) {
parameter_len += (uint16_t) sizeof(uint16_t);
}
if (stcb->asoc.scope.ipv6_addr_legal) {
parameter_len += (uint16_t) sizeof(uint16_t);
}
sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len);
sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE);
sup_addr->ph.param_length = htons(parameter_len);
i = 0;
if (stcb->asoc.scope.ipv4_addr_legal) {
sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS);
}
if (stcb->asoc.scope.ipv6_addr_legal) {
sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS);
}
padding_len = 4 - 2 * i;
chunk_len += parameter_len;
}
SCTP_BUF_LEN(m) = chunk_len;
/* now the addresses */
/*
* To optimize this we could put the scoping stuff into a structure
* and remove the individual uint8's from the assoc structure. Then
* we could just sifa in the address within the stcb. But for now
* this is a quick hack to get the address stuff teased apart.
*/
m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope,
m, cnt_inits_to,
&padding_len, &chunk_len);
init->ch.chunk_length = htons(chunk_len);
if (padding_len > 0) {
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
sctp_m_freem(m);
return;
}
}
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n");
ret = sctp_lowlevel_chunk_output(inp, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
m, 0, NULL, 0, 0, 0, 0,
inp->sctp_lport, stcb->rport, htonl(0),
net->port, NULL,
0, 0,
so_locked);
SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
(void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time);
}
struct mbuf *
sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt,
int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly)
{
/*
* Given a mbuf containing an INIT or INIT-ACK with the param_offset
* being equal to the beginning of the params i.e. (iphlen +
* sizeof(struct sctp_init_msg) parse through the parameters to the
* end of the mbuf verifying that all parameters are known.
*
* For unknown parameters build and return a mbuf with
* UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop
* processing this chunk stop, and set *abort_processing to 1.
*
* By having param_offset be pre-set to where parameters begin it is
* hoped that this routine may be reused in the future by new
* features.
*/
struct sctp_paramhdr *phdr, params;
struct mbuf *mat, *op_err;
char tempbuf[SCTP_PARAM_BUFFER_SIZE];
int at, limit, pad_needed;
uint16_t ptype, plen, padded_size;
int err_at;
*abort_processing = 0;
mat = in_initpkt;
err_at = 0;
limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk);
at = param_offset;
op_err = NULL;
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n");
phdr = sctp_get_next_param(mat, at, &params, sizeof(params));
while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) {
ptype = ntohs(phdr->param_type);
plen = ntohs(phdr->param_length);
if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) {
/* wacked parameter */
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen);
goto invalid_size;
}
limit -= SCTP_SIZE32(plen);
/*-
* All parameters for all chunks that we know/understand are
* listed here. We process them other places and make
* appropriate stop actions per the upper bits. However this
* is the generic routine processor's can call to get back
* an operr.. to either incorporate (init-ack) or send.
*/
padded_size = SCTP_SIZE32(plen);
switch (ptype) {
/* Param's with variable size */
case SCTP_HEARTBEAT_INFO:
case SCTP_STATE_COOKIE:
case SCTP_UNRECOG_PARAM:
case SCTP_ERROR_CAUSE_IND:
/* ok skip fwd */
at += padded_size;
break;
/* Param's with variable size within a range */
case SCTP_CHUNK_LIST:
case SCTP_SUPPORTED_CHUNK_EXT:
if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_SUPPORTED_ADDRTYPE:
if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_RANDOM:
if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_SET_PRIM_ADDR:
case SCTP_DEL_IP_ADDRESS:
case SCTP_ADD_IP_ADDRESS:
if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) &&
(padded_size != sizeof(struct sctp_asconf_addr_param))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
/* Param's with a fixed size */
case SCTP_IPV4_ADDRESS:
if (padded_size != sizeof(struct sctp_ipv4addr_param)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_IPV6_ADDRESS:
if (padded_size != sizeof(struct sctp_ipv6addr_param)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_COOKIE_PRESERVE:
if (padded_size != sizeof(struct sctp_cookie_perserve_param)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_HAS_NAT_SUPPORT:
*nat_friendly = 1;
/* fall through */
case SCTP_PRSCTP_SUPPORTED:
if (padded_size != sizeof(struct sctp_paramhdr)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_ECN_CAPABLE:
if (padded_size != sizeof(struct sctp_paramhdr)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_ULP_ADAPTATION:
if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_SUCCESS_REPORT:
if (padded_size != sizeof(struct sctp_asconf_paramhdr)) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen);
goto invalid_size;
}
at += padded_size;
break;
case SCTP_HOSTNAME_ADDRESS:
{
/* We can NOT handle HOST NAME addresses!! */
int l_len;
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n");
*abort_processing = 1;
if (op_err == NULL) {
/* Ok need to try to get a mbuf */
#ifdef INET6
l_len = SCTP_MIN_OVERHEAD;
#else
l_len = SCTP_MIN_V4_OVERHEAD;
#endif
l_len += sizeof(struct sctp_chunkhdr);
l_len += plen;
l_len += sizeof(struct sctp_paramhdr);
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
if (op_err) {
SCTP_BUF_LEN(op_err) = 0;
/*
* pre-reserve space for ip
* and sctp header and
* chunk hdr
*/
#ifdef INET6
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
#else
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
#endif
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
}
}
if (op_err) {
/* If we have space */
struct sctp_paramhdr s;
if (err_at % 4) {
uint32_t cpthis = 0;
pad_needed = 4 - (err_at % 4);
m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
err_at += pad_needed;
}
s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR);
s.param_length = htons(sizeof(s) + plen);
m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
err_at += sizeof(s);
phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
if (phdr == NULL) {
sctp_m_freem(op_err);
/*
* we are out of memory but
* we still need to have a
* look at what to do (the
* system is in trouble
* though).
*/
return (NULL);
}
m_copyback(op_err, err_at, plen, (caddr_t)phdr);
}
return (op_err);
break;
}
default:
/*
* we do not recognize the parameter figure out what
* we do.
*/
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype);
if ((ptype & 0x4000) == 0x4000) {
/* Report bit is set?? */
SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n");
if (op_err == NULL) {
int l_len;
/* Ok need to try to get an mbuf */
#ifdef INET6
l_len = SCTP_MIN_OVERHEAD;
#else
l_len = SCTP_MIN_V4_OVERHEAD;
#endif
l_len += sizeof(struct sctp_chunkhdr);
l_len += plen;
l_len += sizeof(struct sctp_paramhdr);
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
if (op_err) {
SCTP_BUF_LEN(op_err) = 0;
#ifdef INET6
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
#else
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
#endif
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
}
}
if (op_err) {
/* If we have space */
struct sctp_paramhdr s;
if (err_at % 4) {
uint32_t cpthis = 0;
pad_needed = 4 - (err_at % 4);
m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
err_at += pad_needed;
}
s.param_type = htons(SCTP_UNRECOG_PARAM);
s.param_length = htons(sizeof(s) + plen);
m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
err_at += sizeof(s);
if (plen > sizeof(tempbuf)) {
plen = sizeof(tempbuf);
}
phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen));
if (phdr == NULL) {
sctp_m_freem(op_err);
/*
* we are out of memory but
* we still need to have a
* look at what to do (the
* system is in trouble
* though).
*/
op_err = NULL;
goto more_processing;
}
m_copyback(op_err, err_at, plen, (caddr_t)phdr);
err_at += plen;
}
}
more_processing:
if ((ptype & 0x8000) == 0x0000) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n");
return (op_err);
} else {
/* skip this chunk and continue processing */
SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n");
at += SCTP_SIZE32(plen);
}
break;
}
phdr = sctp_get_next_param(mat, at, &params, sizeof(params));
}
return (op_err);
invalid_size:
SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n");
*abort_processing = 1;
if ((op_err == NULL) && phdr) {
int l_len;
#ifdef INET6
l_len = SCTP_MIN_OVERHEAD;
#else
l_len = SCTP_MIN_V4_OVERHEAD;
#endif
l_len += sizeof(struct sctp_chunkhdr);
l_len += (2 * sizeof(struct sctp_paramhdr));
op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA);
if (op_err) {
SCTP_BUF_LEN(op_err) = 0;
#ifdef INET6
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr));
#else
SCTP_BUF_RESV_UF(op_err, sizeof(struct ip));
#endif
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr));
SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr));
}
}
if ((op_err) && phdr) {
struct sctp_paramhdr s;
if (err_at % 4) {
uint32_t cpthis = 0;
pad_needed = 4 - (err_at % 4);
m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis);
err_at += pad_needed;
}
s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION);
s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr));
m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s);
err_at += sizeof(s);
/* Only copy back the p-hdr that caused the issue */
m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr);
}
return (op_err);
}
static int
sctp_are_there_new_addresses(struct sctp_association *asoc,
struct mbuf *in_initpkt, int offset, struct sockaddr *src)
{
/*
* Given a INIT packet, look through the packet to verify that there
* are NO new addresses. As we go through the parameters add reports
* of any un-understood parameters that require an error. Also we
* must return (1) to drop the packet if we see a un-understood
* parameter that tells us to drop the chunk.
*/
struct sockaddr *sa_touse;
struct sockaddr *sa;
struct sctp_paramhdr *phdr, params;
uint16_t ptype, plen;
uint8_t fnd;
struct sctp_nets *net;
#ifdef INET
struct sockaddr_in sin4, *sa4;
#endif
#ifdef INET6
struct sockaddr_in6 sin6, *sa6;
#endif
#ifdef INET
memset(&sin4, 0, sizeof(sin4));
sin4.sin_family = AF_INET;
sin4.sin_len = sizeof(sin4);
#endif
#ifdef INET6
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(sin6);
#endif
/* First what about the src address of the pkt ? */
fnd = 0;
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
sa = (struct sockaddr *)&net->ro._l_addr;
if (sa->sa_family == src->sa_family) {
#ifdef INET
if (sa->sa_family == AF_INET) {
struct sockaddr_in *src4;
sa4 = (struct sockaddr_in *)sa;
src4 = (struct sockaddr_in *)src;
if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) {
fnd = 1;
break;
}
}
#endif
#ifdef INET6
if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *src6;
sa6 = (struct sockaddr_in6 *)sa;
src6 = (struct sockaddr_in6 *)src;
if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) {
fnd = 1;
break;
}
}
#endif
}
}
if (fnd == 0) {
/* New address added! no need to look futher. */
return (1);
}
/* Ok so far lets munge through the rest of the packet */
offset += sizeof(struct sctp_init_chunk);
phdr = sctp_get_next_param(in_initpkt, offset, &params, sizeof(params));
while (phdr) {
sa_touse = NULL;
ptype = ntohs(phdr->param_type);
plen = ntohs(phdr->param_length);
switch (ptype) {
#ifdef INET
case SCTP_IPV4_ADDRESS:
{
struct sctp_ipv4addr_param *p4, p4_buf;
phdr = sctp_get_next_param(in_initpkt, offset,
(struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
if (plen != sizeof(struct sctp_ipv4addr_param) ||
phdr == NULL) {
return (1);
}
p4 = (struct sctp_ipv4addr_param *)phdr;
sin4.sin_addr.s_addr = p4->addr;
sa_touse = (struct sockaddr *)&sin4;
break;
}
#endif
#ifdef INET6
case SCTP_IPV6_ADDRESS:
{
struct sctp_ipv6addr_param *p6, p6_buf;
phdr = sctp_get_next_param(in_initpkt, offset,
(struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
if (plen != sizeof(struct sctp_ipv6addr_param) ||
phdr == NULL) {
return (1);
}
p6 = (struct sctp_ipv6addr_param *)phdr;
memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
sizeof(p6->addr));
sa_touse = (struct sockaddr *)&sin6;
break;
}
#endif
default:
sa_touse = NULL;
break;
}
if (sa_touse) {
/* ok, sa_touse points to one to check */
fnd = 0;
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
sa = (struct sockaddr *)&net->ro._l_addr;
if (sa->sa_family != sa_touse->sa_family) {
continue;
}
#ifdef INET
if (sa->sa_family == AF_INET) {
sa4 = (struct sockaddr_in *)sa;
if (sa4->sin_addr.s_addr ==
sin4.sin_addr.s_addr) {
fnd = 1;
break;
}
}
#endif
#ifdef INET6
if (sa->sa_family == AF_INET6) {
sa6 = (struct sockaddr_in6 *)sa;
if (SCTP6_ARE_ADDR_EQUAL(
sa6, &sin6)) {
fnd = 1;
break;
}
}
#endif
}
if (!fnd) {
/* New addr added! no need to look further */
return (1);
}
}
offset += SCTP_SIZE32(plen);
phdr = sctp_get_next_param(in_initpkt, offset, &params, sizeof(params));
}
return (0);
}
/*
* Given a MBUF chain that was sent into us containing an INIT. Build a
* INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done
* a pullup to include IPv6/4header, SCTP header and initial part of INIT
* message (i.e. the struct sctp_init_msg).
*/
void
sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct mbuf *init_pkt, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_init_chunk *init_chk,
uint8_t mflowtype, uint32_t mflowid,
uint32_t vrf_id, uint16_t port, int hold_inp_lock)
{
struct sctp_association *asoc;
struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err;
struct sctp_init_ack_chunk *initack;
struct sctp_adaptation_layer_indication *ali;
struct sctp_supported_chunk_types_param *pr_supported;
struct sctp_paramhdr *ph;
union sctp_sockstore *over_addr;
struct sctp_scoping scp;
#ifdef INET
struct sockaddr_in *dst4 = (struct sockaddr_in *)dst;
struct sockaddr_in *src4 = (struct sockaddr_in *)src;
struct sockaddr_in *sin;
#endif
#ifdef INET6
struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst;
struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src;
struct sockaddr_in6 *sin6;
#endif
struct sockaddr *to;
struct sctp_state_cookie stc;
struct sctp_nets *net = NULL;
uint8_t *signature = NULL;
int cnt_inits_to = 0;
uint16_t his_limit, i_want;
int abort_flag;
int nat_friendly = 0;
struct socket *so;
uint16_t num_ext, chunk_len, padding_len, parameter_len;
if (stcb) {
asoc = &stcb->asoc;
} else {
asoc = NULL;
}
if ((asoc != NULL) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) &&
(sctp_are_there_new_addresses(asoc, init_pkt, offset, src))) {
/* new addresses, out of here in non-cookie-wait states */
/*
* Send a ABORT, we don't add the new address error clause
* though we even set the T bit and copy in the 0 tag.. this
* looks no different than if no listener was present.
*/
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
"Address added");
sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
return;
}
abort_flag = 0;
op_err = sctp_arethere_unrecognized_parameters(init_pkt,
(offset + sizeof(struct sctp_init_chunk)),
&abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly);
if (abort_flag) {
do_a_abort:
if (op_err == NULL) {
char msg[SCTP_DIAG_INFO_LEN];
snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
}
sctp_send_abort(init_pkt, iphlen, src, dst, sh,
init_chk->init.initiate_tag, op_err,
mflowtype, mflowid, inp->fibnum,
vrf_id, port);
return;
}
m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (m == NULL) {
/* No memory, INIT timer will re-attempt. */
if (op_err)
sctp_m_freem(op_err);
return;
}
chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk);
padding_len = 0;
/*
* We might not overwrite the identification[] completely and on
* some platforms time_entered will contain some padding. Therefore
* zero out the cookie to avoid putting uninitialized memory on the
* wire.
*/
memset(&stc, 0, sizeof(struct sctp_state_cookie));
/* the time I built cookie */
(void)SCTP_GETTIME_TIMEVAL(&stc.time_entered);
/* populate any tie tags */
if (asoc != NULL) {
/* unlock before tag selections */
stc.tie_tag_my_vtag = asoc->my_vtag_nonce;
stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce;
stc.cookie_life = asoc->cookie_life;
net = asoc->primary_destination;
} else {
stc.tie_tag_my_vtag = 0;
stc.tie_tag_peer_vtag = 0;
/* life I will award this cookie */
stc.cookie_life = inp->sctp_ep.def_cookie_life;
}
/* copy in the ports for later check */
stc.myport = sh->dest_port;
stc.peerport = sh->src_port;
/*
* If we wanted to honor cookie life extentions, we would add to
* stc.cookie_life. For now we should NOT honor any extension
*/
stc.site_scope = stc.local_scope = stc.loopback_scope = 0;
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
stc.ipv6_addr_legal = 1;
if (SCTP_IPV6_V6ONLY(inp)) {
stc.ipv4_addr_legal = 0;
} else {
stc.ipv4_addr_legal = 1;
}
} else {
stc.ipv6_addr_legal = 0;
stc.ipv4_addr_legal = 1;
}
stc.ipv4_scope = 0;
if (net == NULL) {
to = src;
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
{
/* lookup address */
stc.address[0] = src4->sin_addr.s_addr;
stc.address[1] = 0;
stc.address[2] = 0;
stc.address[3] = 0;
stc.addr_type = SCTP_IPV4_ADDRESS;
/* local from address */
stc.laddress[0] = dst4->sin_addr.s_addr;
stc.laddress[1] = 0;
stc.laddress[2] = 0;
stc.laddress[3] = 0;
stc.laddr_type = SCTP_IPV4_ADDRESS;
/* scope_id is only for v6 */
stc.scope_id = 0;
if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
(IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
stc.ipv4_scope = 1;
}
/* Must use the address in this case */
if (sctp_is_address_on_local_host(src, vrf_id)) {
stc.loopback_scope = 1;
stc.ipv4_scope = 1;
stc.site_scope = 1;
stc.local_scope = 0;
}
break;
}
#endif
#ifdef INET6
case AF_INET6:
{
stc.addr_type = SCTP_IPV6_ADDRESS;
memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr));
stc.scope_id = in6_getscope(&src6->sin6_addr);
if (sctp_is_address_on_local_host(src, vrf_id)) {
stc.loopback_scope = 1;
stc.local_scope = 0;
stc.site_scope = 1;
stc.ipv4_scope = 1;
} else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
/*
* If the new destination or source
* is a LINK_LOCAL we must have
* common both site and local scope.
* Don't set local scope though
* since we must depend on the
* source to be added implicitly. We
* cannot assure just because we
* share one link that all links are
* common.
*/
stc.local_scope = 0;
stc.site_scope = 1;
stc.ipv4_scope = 1;
/*
* we start counting for the private
* address stuff at 1. since the
* link local we source from won't
* show up in our scoped count.
*/
cnt_inits_to = 1;
/*
* pull out the scope_id from
* incoming pkt
*/
} else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
/*
* If the new destination or source
* is SITE_LOCAL then we must have
* site scope in common.
*/
stc.site_scope = 1;
}
memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr));
stc.laddr_type = SCTP_IPV6_ADDRESS;
break;
}
#endif
default:
/* TSNH */
goto do_a_abort;
break;
}
} else {
/* set the scope per the existing tcb */
#ifdef INET6
struct sctp_nets *lnet;
#endif
stc.loopback_scope = asoc->scope.loopback_scope;
stc.ipv4_scope = asoc->scope.ipv4_local_scope;
stc.site_scope = asoc->scope.site_scope;
stc.local_scope = asoc->scope.local_scope;
#ifdef INET6
/* Why do we not consider IPv4 LL addresses? */
TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) {
if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) {
/*
* if we have a LL address, start
* counting at 1.
*/
cnt_inits_to = 1;
}
}
}
#endif
/* use the net pointer */
to = (struct sockaddr *)&net->ro._l_addr;
switch (to->sa_family) {
#ifdef INET
case AF_INET:
sin = (struct sockaddr_in *)to;
stc.address[0] = sin->sin_addr.s_addr;
stc.address[1] = 0;
stc.address[2] = 0;
stc.address[3] = 0;
stc.addr_type = SCTP_IPV4_ADDRESS;
if (net->src_addr_selected == 0) {
/*
* strange case here, the INIT should have
* did the selection.
*/
net->ro._s_addr = sctp_source_address_selection(inp,
stcb, (sctp_route_t *) & net->ro,
net, 0, vrf_id);
if (net->ro._s_addr == NULL)
return;
net->src_addr_selected = 1;
}
stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr;
stc.laddress[1] = 0;
stc.laddress[2] = 0;
stc.laddress[3] = 0;
stc.laddr_type = SCTP_IPV4_ADDRESS;
/* scope_id is only for v6 */
stc.scope_id = 0;
break;
#endif
#ifdef INET6
case AF_INET6:
sin6 = (struct sockaddr_in6 *)to;
memcpy(&stc.address, &sin6->sin6_addr,
sizeof(struct in6_addr));
stc.addr_type = SCTP_IPV6_ADDRESS;
stc.scope_id = sin6->sin6_scope_id;
if (net->src_addr_selected == 0) {
/*
* strange case here, the INIT should have
* done the selection.
*/
net->ro._s_addr = sctp_source_address_selection(inp,
stcb, (sctp_route_t *) & net->ro,
net, 0, vrf_id);
if (net->ro._s_addr == NULL)
return;
net->src_addr_selected = 1;
}
memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr,
sizeof(struct in6_addr));
stc.laddr_type = SCTP_IPV6_ADDRESS;
break;
#endif
}
}
/* Now lets put the SCTP header in place */
initack = mtod(m, struct sctp_init_ack_chunk *);
/* Save it off for quick ref */
stc.peers_vtag = init_chk->init.initiate_tag;
/* who are we */
memcpy(stc.identification, SCTP_VERSION_STRING,
min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification)));
memset(stc.reserved, 0, SCTP_RESERVE_SPACE);
/* now the chunk header */
initack->ch.chunk_type = SCTP_INITIATION_ACK;
initack->ch.chunk_flags = 0;
/* fill in later from mbuf we build */
initack->ch.chunk_length = 0;
/* place in my tag */
if ((asoc != NULL) &&
((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) {
/* re-use the v-tags and init-seq here */
initack->init.initiate_tag = htonl(asoc->my_vtag);
initack->init.initial_tsn = htonl(asoc->init_seq_number);
} else {
uint32_t vtag, itsn;
if (hold_inp_lock) {
SCTP_INP_INCR_REF(inp);
SCTP_INP_RUNLOCK(inp);
}
if (asoc) {
atomic_add_int(&asoc->refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
new_tag:
vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) {
/*
* Got a duplicate vtag on some guy behind a
* nat make sure we don't use it.
*/
goto new_tag;
}
initack->init.initiate_tag = htonl(vtag);
/* get a TSN to use too */
itsn = sctp_select_initial_TSN(&inp->sctp_ep);
initack->init.initial_tsn = htonl(itsn);
SCTP_TCB_LOCK(stcb);
atomic_add_int(&asoc->refcnt, -1);
} else {
vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1);
initack->init.initiate_tag = htonl(vtag);
/* get a TSN to use too */
initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep));
}
if (hold_inp_lock) {
SCTP_INP_RLOCK(inp);
SCTP_INP_DECR_REF(inp);
}
}
/* save away my tag to */
stc.my_vtag = initack->init.initiate_tag;
/* set up some of the credits. */
so = inp->sctp_socket;
if (so == NULL) {
/* memory problem */
sctp_m_freem(m);
return;
} else {
initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND));
}
/* set what I want */
his_limit = ntohs(init_chk->init.num_inbound_streams);
/* choose what I want */
if (asoc != NULL) {
if (asoc->streamoutcnt > asoc->pre_open_streams) {
i_want = asoc->streamoutcnt;
} else {
i_want = asoc->pre_open_streams;
}
} else {
i_want = inp->sctp_ep.pre_open_stream_count;
}
if (his_limit < i_want) {
/* I Want more :< */
initack->init.num_outbound_streams = init_chk->init.num_inbound_streams;
} else {
/* I can have what I want :> */
initack->init.num_outbound_streams = htons(i_want);
}
/* tell him his limit. */
initack->init.num_inbound_streams =
htons(inp->sctp_ep.max_open_streams_intome);
/* adaptation layer indication parameter */
if (inp->sctp_ep.adaptation_layer_indicator_provided) {
parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication);
ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len);
ali->ph.param_type = htons(SCTP_ULP_ADAPTATION);
ali->ph.param_length = htons(parameter_len);
ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator);
chunk_len += parameter_len;
}
/* ECN parameter */
if (((asoc != NULL) && (asoc->ecn_supported == 1)) ||
((asoc == NULL) && (inp->ecn_supported == 1))) {
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_ECN_CAPABLE);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
/* PR-SCTP supported parameter */
if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
((asoc == NULL) && (inp->prsctp_supported == 1))) {
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_PRSCTP_SUPPORTED);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
/* Add NAT friendly parameter */
if (nat_friendly) {
parameter_len = (uint16_t) sizeof(struct sctp_paramhdr);
ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len);
ph->param_type = htons(SCTP_HAS_NAT_SUPPORT);
ph->param_length = htons(parameter_len);
chunk_len += parameter_len;
}
/* And now tell the peer which extensions we support */
num_ext = 0;
pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len);
if (((asoc != NULL) && (asoc->prsctp_supported == 1)) ||
((asoc == NULL) && (inp->prsctp_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN;
}
if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
((asoc == NULL) && (inp->auth_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION;
}
if (((asoc != NULL) && (asoc->asconf_supported == 1)) ||
((asoc == NULL) && (inp->asconf_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF;
pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK;
}
if (((asoc != NULL) && (asoc->reconfig_supported == 1)) ||
((asoc == NULL) && (inp->reconfig_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET;
}
if (((asoc != NULL) && (asoc->nrsack_supported == 1)) ||
((asoc == NULL) && (inp->nrsack_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK;
}
if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) ||
((asoc == NULL) && (inp->pktdrop_supported == 1))) {
pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED;
}
if (num_ext > 0) {
parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext;
pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT);
pr_supported->ph.param_length = htons(parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
/* add authentication parameters */
if (((asoc != NULL) && (asoc->auth_supported == 1)) ||
((asoc == NULL) && (inp->auth_supported == 1))) {
struct sctp_auth_random *randp;
struct sctp_auth_hmac_algo *hmacs;
struct sctp_auth_chunk_list *chunks;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
/* generate and add RANDOM parameter */
randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t) sizeof(struct sctp_auth_random) +
SCTP_AUTH_RANDOM_SIZE_DEFAULT;
randp->ph.param_type = htons(SCTP_RANDOM);
randp->ph.param_length = htons(parameter_len);
SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
/* add HMAC_ALGO parameter */
hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) +
sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs,
(uint8_t *) hmacs->hmac_ids);
hmacs->ph.param_type = htons(SCTP_HMAC_LIST);
hmacs->ph.param_length = htons(parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
padding_len = 0;
}
/* add CHUNKS parameter */
chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len);
parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) +
sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks,
chunks->chunk_types);
chunks->ph.param_type = htons(SCTP_CHUNK_LIST);
chunks->ph.param_length = htons(parameter_len);
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
}
SCTP_BUF_LEN(m) = chunk_len;
m_last = m;
/* now the addresses */
/*
* To optimize this we could put the scoping stuff into a structure
* and remove the individual uint8's from the stc structure. Then we
* could just sifa in the address within the stc.. but for now this
* is a quick hack to get the address stuff teased apart.
*/
scp.ipv4_addr_legal = stc.ipv4_addr_legal;
scp.ipv6_addr_legal = stc.ipv6_addr_legal;
scp.loopback_scope = stc.loopback_scope;
scp.ipv4_local_scope = stc.ipv4_scope;
scp.local_scope = stc.local_scope;
scp.site_scope = stc.site_scope;
m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last,
cnt_inits_to,
&padding_len, &chunk_len);
/* padding_len can only be positive, if no addresses have been added */
if (padding_len > 0) {
memset(mtod(m, caddr_t)+chunk_len, 0, padding_len);
chunk_len += padding_len;
SCTP_BUF_LEN(m) += padding_len;
padding_len = 0;
}
/* tack on the operational error if present */
if (op_err) {
parameter_len = 0;
for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
parameter_len += SCTP_BUF_LEN(m_tmp);
}
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
SCTP_BUF_NEXT(m_last) = op_err;
while (SCTP_BUF_NEXT(m_last) != NULL) {
m_last = SCTP_BUF_NEXT(m_last);
}
chunk_len += parameter_len;
}
if (padding_len > 0) {
m_last = sctp_add_pad_tombuf(m_last, padding_len);
if (m_last == NULL) {
/* Houston we have a problem, no space */
sctp_m_freem(m);
return;
}
chunk_len += padding_len;
padding_len = 0;
}
/* Now we must build a cookie */
m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature);
if (m_cookie == NULL) {
/* memory problem */
sctp_m_freem(m);
return;
}
/* Now append the cookie to the end and update the space/size */
SCTP_BUF_NEXT(m_last) = m_cookie;
parameter_len = 0;
for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) {
parameter_len += SCTP_BUF_LEN(m_tmp);
if (SCTP_BUF_NEXT(m_tmp) == NULL) {
m_last = m_tmp;
}
}
padding_len = SCTP_SIZE32(parameter_len) - parameter_len;
chunk_len += parameter_len;
/*
* Place in the size, but we don't include the last pad (if any) in
* the INIT-ACK.
*/
initack->ch.chunk_length = htons(chunk_len);
/*
* Time to sign the cookie, we don't sign over the cookie signature
* though thus we set trailer.
*/
(void)sctp_hmac_m(SCTP_HMAC,
(uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)],
SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr),
(uint8_t *) signature, SCTP_SIGNATURE_SIZE);
/*
* We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return
* here since the timer will drive a retranmission.
*/
if (padding_len > 0) {
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
sctp_m_freem(m);
return;
}
}
if (stc.loopback_scope) {
over_addr = (union sctp_sockstore *)dst;
} else {
over_addr = NULL;
}
(void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0,
0, 0,
inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag,
port, over_addr,
mflowtype, mflowid,
SCTP_SO_NOT_LOCKED);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
static void
sctp_prune_prsctp(struct sctp_tcb *stcb,
struct sctp_association *asoc,
struct sctp_sndrcvinfo *srcv,
int dataout)
{
int freed_spc = 0;
struct sctp_tmit_chunk *chk, *nchk;
SCTP_TCB_LOCK_ASSERT(stcb);
if ((asoc->prsctp_supported) &&
(asoc->sent_queue_cnt_removeable > 0)) {
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
/*
* Look for chunks marked with the PR_SCTP flag AND
* the buffer space flag. If the one being sent is
* equal or greater priority then purge the old one
* and free some space.
*/
if (PR_SCTP_BUF_ENABLED(chk->flags)) {
/*
* This one is PR-SCTP AND buffer space
* limited type
*/
if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
/*
* Lower numbers equates to higher
* priority so if the one we are
* looking at has a larger or equal
* priority we want to drop the data
* and NOT retransmit it.
*/
if (chk->data) {
/*
* We release the book_size
* if the mbuf is here
*/
int ret_spc;
uint8_t sent;
if (chk->sent > SCTP_DATAGRAM_UNSENT)
sent = 1;
else
sent = 0;
ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
sent,
SCTP_SO_LOCKED);
freed_spc += ret_spc;
if (freed_spc >= dataout) {
return;
}
} /* if chunk was present */
} /* if of sufficent priority */
} /* if chunk has enabled */
} /* tailqforeach */
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
/* Here we must move to the sent queue and mark */
if (PR_SCTP_BUF_ENABLED(chk->flags)) {
if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) {
if (chk->data) {
/*
* We release the book_size
* if the mbuf is here
*/
int ret_spc;
ret_spc = sctp_release_pr_sctp_chunk(stcb, chk,
0, SCTP_SO_LOCKED);
freed_spc += ret_spc;
if (freed_spc >= dataout) {
return;
}
} /* end if chk->data */
} /* end if right class */
} /* end if chk pr-sctp */
} /* tailqforeachsafe (chk) */
} /* if enabled in asoc */
}
int
sctp_get_frag_point(struct sctp_tcb *stcb,
struct sctp_association *asoc)
{
int siz, ovh;
/*
* For endpoints that have both v6 and v4 addresses we must reserve
* room for the ipv6 header, for those that are only dealing with V4
* we use a larger frag point.
*/
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
ovh = SCTP_MED_OVERHEAD;
} else {
ovh = SCTP_MED_V4_OVERHEAD;
}
if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu)
siz = asoc->smallest_mtu - ovh;
else
siz = (stcb->asoc.sctp_frag_point - ovh);
/*
* if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) {
*/
/* A data chunk MUST fit in a cluster */
/* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */
/* } */
/* adjust for an AUTH chunk if DATA requires auth */
if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks))
siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
if (siz % 4) {
/* make it an even word boundary please */
siz -= (siz % 4);
}
return (siz);
}
static void
sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp)
{
/*
* We assume that the user wants PR_SCTP_TTL if the user provides a
* positive lifetime but does not specify any PR_SCTP policy.
*/
if (PR_SCTP_ENABLED(sp->sinfo_flags)) {
sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
} else if (sp->timetolive > 0) {
sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags);
} else {
return;
}
switch (PR_SCTP_POLICY(sp->sinfo_flags)) {
case CHUNK_FLAGS_PR_SCTP_BUF:
/*
* Time to live is a priority stored in tv_sec when doing
* the buffer drop thing.
*/
sp->ts.tv_sec = sp->timetolive;
sp->ts.tv_usec = 0;
break;
case CHUNK_FLAGS_PR_SCTP_TTL:
{
struct timeval tv;
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
tv.tv_sec = sp->timetolive / 1000;
tv.tv_usec = (sp->timetolive * 1000) % 1000000;
/*
* TODO sctp_constants.h needs alternative time
* macros when _KERNEL is undefined.
*/
timevaladd(&sp->ts, &tv);
}
break;
case CHUNK_FLAGS_PR_SCTP_RTX:
/*
* Time to live is a the number or retransmissions stored in
* tv_sec.
*/
sp->ts.tv_sec = sp->timetolive;
sp->ts.tv_usec = 0;
break;
default:
SCTPDBG(SCTP_DEBUG_USRREQ1,
"Unknown PR_SCTP policy %u.\n",
PR_SCTP_POLICY(sp->sinfo_flags));
break;
}
}
static int
sctp_msg_append(struct sctp_tcb *stcb,
struct sctp_nets *net,
struct mbuf *m,
struct sctp_sndrcvinfo *srcv, int hold_stcb_lock)
{
int error = 0;
struct mbuf *at;
struct sctp_stream_queue_pending *sp = NULL;
struct sctp_stream_out *strm;
/*
* Given an mbuf chain, put it into the association send queue and
* place it on the wheel
*/
if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) {
/* Invalid stream number */
SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_now;
}
if ((stcb->asoc.stream_locked) &&
(stcb->asoc.stream_locked_on != srcv->sinfo_stream)) {
SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_now;
}
strm = &stcb->asoc.strmout[srcv->sinfo_stream];
/* Now can we send this? */
if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
(stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) {
/* got data while shutting down */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
error = ECONNRESET;
goto out_now;
}
sctp_alloc_a_strmoq(stcb, sp);
if (sp == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
error = ENOMEM;
goto out_now;
}
sp->sinfo_flags = srcv->sinfo_flags;
sp->timetolive = srcv->sinfo_timetolive;
sp->ppid = srcv->sinfo_ppid;
sp->context = srcv->sinfo_context;
if (sp->sinfo_flags & SCTP_ADDR_OVER) {
sp->net = net;
atomic_add_int(&sp->net->ref_count, 1);
} else {
sp->net = NULL;
}
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
sp->stream = srcv->sinfo_stream;
sp->msg_is_complete = 1;
sp->sender_all_done = 1;
sp->some_taken = 0;
sp->data = m;
sp->tail_mbuf = NULL;
sctp_set_prsctp_policy(sp);
/*
* We could in theory (for sendall) sifa the length in, but we would
* still have to hunt through the chain since we need to setup the
* tail_mbuf
*/
sp->length = 0;
for (at = m; at; at = SCTP_BUF_NEXT(at)) {
if (SCTP_BUF_NEXT(at) == NULL)
sp->tail_mbuf = at;
sp->length += SCTP_BUF_LEN(at);
}
if (srcv->sinfo_keynumber_valid) {
sp->auth_keyid = srcv->sinfo_keynumber;
} else {
sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
}
if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
sctp_auth_key_acquire(stcb, sp->auth_keyid);
sp->holds_key_ref = 1;
}
if (hold_stcb_lock == 0) {
SCTP_TCB_SEND_LOCK(stcb);
}
sctp_snd_sb_alloc(stcb, sp->length);
atomic_add_int(&stcb->asoc.stream_queue_cnt, 1);
TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1);
m = NULL;
if (hold_stcb_lock == 0) {
SCTP_TCB_SEND_UNLOCK(stcb);
}
out_now:
if (m) {
sctp_m_freem(m);
}
return (error);
}
static struct mbuf *
sctp_copy_mbufchain(struct mbuf *clonechain,
struct mbuf *outchain,
struct mbuf **endofchain,
int can_take_mbuf,
int sizeofcpy,
uint8_t copy_by_ref)
{
struct mbuf *m;
struct mbuf *appendchain;
caddr_t cp;
int len;
if (endofchain == NULL) {
/* error */
error_out:
if (outchain)
sctp_m_freem(outchain);
return (NULL);
}
if (can_take_mbuf) {
appendchain = clonechain;
} else {
if (!copy_by_ref &&
(sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN)))
) {
/* Its not in a cluster */
if (*endofchain == NULL) {
/* lets get a mbuf cluster */
if (outchain == NULL) {
/* This is the general case */
new_mbuf:
outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
if (outchain == NULL) {
goto error_out;
}
SCTP_BUF_LEN(outchain) = 0;
*endofchain = outchain;
/* get the prepend space */
SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4));
} else {
/*
* We really should not get a NULL
* in endofchain
*/
/* find end */
m = outchain;
while (m) {
if (SCTP_BUF_NEXT(m) == NULL) {
*endofchain = m;
break;
}
m = SCTP_BUF_NEXT(m);
}
/* sanity */
if (*endofchain == NULL) {
/*
* huh, TSNH XXX maybe we
* should panic
*/
sctp_m_freem(outchain);
goto new_mbuf;
}
}
/* get the new end of length */
len = M_TRAILINGSPACE(*endofchain);
} else {
/* how much is left at the end? */
len = M_TRAILINGSPACE(*endofchain);
}
/* Find the end of the data, for appending */
cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain)));
/* Now lets copy it out */
if (len >= sizeofcpy) {
/* It all fits, copy it in */
m_copydata(clonechain, 0, sizeofcpy, cp);
SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
} else {
/* fill up the end of the chain */
if (len > 0) {
m_copydata(clonechain, 0, len, cp);
SCTP_BUF_LEN((*endofchain)) += len;
/* now we need another one */
sizeofcpy -= len;
}
m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER);
if (m == NULL) {
/* We failed */
goto error_out;
}
SCTP_BUF_NEXT((*endofchain)) = m;
*endofchain = m;
cp = mtod((*endofchain), caddr_t);
m_copydata(clonechain, len, sizeofcpy, cp);
SCTP_BUF_LEN((*endofchain)) += sizeofcpy;
}
return (outchain);
} else {
/* copy the old fashion way */
appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT);
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY);
}
#endif
}
}
if (appendchain == NULL) {
/* error */
if (outchain)
sctp_m_freem(outchain);
return (NULL);
}
if (outchain) {
/* tack on to the end */
if (*endofchain != NULL) {
SCTP_BUF_NEXT(((*endofchain))) = appendchain;
} else {
m = outchain;
while (m) {
if (SCTP_BUF_NEXT(m) == NULL) {
SCTP_BUF_NEXT(m) = appendchain;
break;
}
m = SCTP_BUF_NEXT(m);
}
}
/*
* save off the end and update the end-chain postion
*/
m = appendchain;
while (m) {
if (SCTP_BUF_NEXT(m) == NULL) {
*endofchain = m;
break;
}
m = SCTP_BUF_NEXT(m);
}
return (outchain);
} else {
/* save off the end and update the end-chain postion */
m = appendchain;
while (m) {
if (SCTP_BUF_NEXT(m) == NULL) {
*endofchain = m;
break;
}
m = SCTP_BUF_NEXT(m);
}
return (appendchain);
}
}
static int
sctp_med_chunk_output(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_association *asoc,
int *num_out,
int *reason_code,
int control_only, int from_where,
struct timeval *now, int *now_filled, int frag_point, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
);
static void
sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr,
uint32_t val SCTP_UNUSED)
{
struct sctp_copy_all *ca;
struct mbuf *m;
int ret = 0;
int added_control = 0;
int un_sent, do_chunk_output = 1;
struct sctp_association *asoc;
struct sctp_nets *net;
ca = (struct sctp_copy_all *)ptr;
if (ca->m == NULL) {
return;
}
if (ca->inp != inp) {
/* TSNH */
return;
}
if (ca->sndlen > 0) {
m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT);
if (m == NULL) {
/* can't copy so we are done */
ca->cnt_failed++;
return;
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(m, SCTP_MBUF_ICOPY);
}
#endif
} else {
m = NULL;
}
SCTP_TCB_LOCK_ASSERT(stcb);
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
if (ca->sndrcv.sinfo_flags & SCTP_ABORT) {
/* Abort this assoc with m as the user defined reason */
if (m != NULL) {
SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT);
} else {
m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr),
0, M_NOWAIT, 1, MT_DATA);
SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
}
if (m != NULL) {
struct sctp_paramhdr *ph;
ph = mtod(m, struct sctp_paramhdr *);
ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen);
}
/*
* We add one here to keep the assoc from dis-appearing on
* us.
*/
atomic_add_int(&stcb->asoc.refcnt, 1);
sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED);
/*
* sctp_abort_an_association calls sctp_free_asoc() free
* association will NOT free it since we incremented the
* refcnt .. we do this to prevent it being freed and things
* getting tricky since we could end up (from free_asoc)
* calling inpcb_free which would get a recursive lock call
* to the iterator lock.. But as a consequence of that the
* stcb will return to us un-locked.. since free_asoc
* returns with either no TCB or the TCB unlocked, we must
* relock.. to unlock in the iterator timer :-0
*/
SCTP_TCB_LOCK(stcb);
atomic_add_int(&stcb->asoc.refcnt, -1);
goto no_chunk_output;
} else {
if (m) {
ret = sctp_msg_append(stcb, net, m,
&ca->sndrcv, 1);
}
asoc = &stcb->asoc;
if (ca->sndrcv.sinfo_flags & SCTP_EOF) {
/* shutdown this assoc */
int cnt;
cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
(cnt == 0)) {
if (asoc->locked_on_sending) {
goto abort_anyway;
}
/*
* there is nothing queued to send, so I'm
* done...
*/
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
/*
* only send SHUTDOWN the first time
* through
*/
if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
sctp_stop_timers_for_shutdown(stcb);
sctp_send_shutdown(stcb, net);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
net);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
asoc->primary_destination);
added_control = 1;
do_chunk_output = 0;
}
} else {
/*
* we still got (or just got) data to send,
* so set SHUTDOWN_PENDING
*/
/*
* XXX sockets draft says that SCTP_EOF
* should be sent with no data. currently,
* we will allow user data to be sent first
* and move to SHUTDOWN-PENDING
*/
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
if (asoc->locked_on_sending) {
/*
* Locked to send out the
* data
*/
struct sctp_stream_queue_pending *sp;
sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
if (sp) {
if ((sp->length == 0) && (sp->msg_is_complete == 0))
asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
}
}
asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
(asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
struct mbuf *op_err;
char msg[SCTP_DIAG_INFO_LEN];
abort_anyway:
snprintf(msg, sizeof(msg),
"%s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
atomic_add_int(&stcb->asoc.refcnt, 1);
sctp_abort_an_association(stcb->sctp_ep, stcb,
op_err, SCTP_SO_NOT_LOCKED);
atomic_add_int(&stcb->asoc.refcnt, -1);
goto no_chunk_output;
}
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
asoc->primary_destination);
}
}
}
}
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(stcb->asoc.total_flight > 0) &&
(un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
do_chunk_output = 0;
}
if (do_chunk_output)
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED);
else if (added_control) {
int num_out, reason, now_filled = 0;
struct timeval now;
int frag_point;
frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
&reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED);
}
no_chunk_output:
if (ret) {
ca->cnt_failed++;
} else {
ca->cnt_sent++;
}
}
static void
sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED)
{
struct sctp_copy_all *ca;
ca = (struct sctp_copy_all *)ptr;
/*
* Do a notify here? Kacheong suggests that the notify be done at
* the send time.. so you would push up a notification if any send
* failed. Don't know if this is feasable since the only failures we
* have is "memory" related and if you cannot get an mbuf to send
* the data you surely can't get an mbuf to send up to notify the
* user you can't send the data :->
*/
/* now free everything */
sctp_m_freem(ca->m);
SCTP_FREE(ca, SCTP_M_COPYAL);
}
static struct mbuf *
sctp_copy_out_all(struct uio *uio, int len)
{
struct mbuf *ret, *at;
int left, willcpy, cancpy, error;
ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA);
if (ret == NULL) {
/* TSNH */
return (NULL);
}
left = len;
SCTP_BUF_LEN(ret) = 0;
/* save space for the data chunk header */
cancpy = M_TRAILINGSPACE(ret);
willcpy = min(cancpy, left);
at = ret;
while (left > 0) {
/* Align data to the end */
error = uiomove(mtod(at, caddr_t), willcpy, uio);
if (error) {
err_out_now:
sctp_m_freem(at);
return (NULL);
}
SCTP_BUF_LEN(at) = willcpy;
SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0;
left -= willcpy;
if (left > 0) {
SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA);
if (SCTP_BUF_NEXT(at) == NULL) {
goto err_out_now;
}
at = SCTP_BUF_NEXT(at);
SCTP_BUF_LEN(at) = 0;
cancpy = M_TRAILINGSPACE(at);
willcpy = min(cancpy, left);
}
}
return (ret);
}
static int
sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
struct sctp_sndrcvinfo *srcv)
{
int ret;
struct sctp_copy_all *ca;
SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
SCTP_M_COPYAL);
if (ca == NULL) {
sctp_m_freem(m);
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
memset(ca, 0, sizeof(struct sctp_copy_all));
ca->inp = inp;
if (srcv) {
memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo));
}
/*
* take off the sendall flag, it would be bad if we failed to do
* this :-0
*/
ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL;
/* get length and mbuf chain */
if (uio) {
ca->sndlen = uio->uio_resid;
ca->m = sctp_copy_out_all(uio, ca->sndlen);
if (ca->m == NULL) {
SCTP_FREE(ca, SCTP_M_COPYAL);
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
} else {
/* Gather the length of the send */
struct mbuf *mat;
ca->sndlen = 0;
for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) {
ca->sndlen += SCTP_BUF_LEN(mat);
}
}
ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL,
SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES,
SCTP_ASOC_ANY_STATE,
(void *)ca, 0,
sctp_sendall_completes, inp, 1);
if (ret) {
SCTP_PRINTF("Failed to initiate iterator for sendall\n");
SCTP_FREE(ca, SCTP_M_COPYAL);
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
return (EFAULT);
}
return (0);
}
void
sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc)
{
struct sctp_tmit_chunk *chk, *nchk;
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
asoc->ctrl_queue_cnt--;
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
}
}
}
void
sctp_toss_old_asconf(struct sctp_tcb *stcb)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk, *nchk;
struct sctp_asconf_chunk *acp;
asoc = &stcb->asoc;
TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
/* find SCTP_ASCONF chunk in queue */
if (chk->rec.chunk_id.id == SCTP_ASCONF) {
if (chk->data) {
acp = mtod(chk->data, struct sctp_asconf_chunk *);
if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) {
/* Not Acked yet */
break;
}
}
TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
asoc->ctrl_queue_cnt--;
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
}
}
}
static void
sctp_clean_up_datalist(struct sctp_tcb *stcb,
struct sctp_association *asoc,
struct sctp_tmit_chunk **data_list,
int bundle_at,
struct sctp_nets *net)
{
int i;
struct sctp_tmit_chunk *tp1;
for (i = 0; i < bundle_at; i++) {
/* off of the send queue */
TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next);
asoc->send_queue_cnt--;
if (i > 0) {
/*
* Any chunk NOT 0 you zap the time chunk 0 gets
* zapped or set based on if a RTO measurment is
* needed.
*/
data_list[i]->do_rtt = 0;
}
/* record time */
data_list[i]->sent_rcv_time = net->last_sent_time;
data_list[i]->rec.data.cwnd_at_send = net->cwnd;
data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq;
if (data_list[i]->whoTo == NULL) {
data_list[i]->whoTo = net;
atomic_add_int(&net->ref_count, 1);
}
/* on to the sent queue */
tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead);
if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
struct sctp_tmit_chunk *tpp;
/* need to move back */
back_up_more:
tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next);
if (tpp == NULL) {
TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next);
goto all_done;
}
tp1 = tpp;
if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) {
goto back_up_more;
}
TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next);
} else {
TAILQ_INSERT_TAIL(&asoc->sent_queue,
data_list[i],
sctp_next);
}
all_done:
/* This does not lower until the cum-ack passes it */
asoc->sent_queue_cnt++;
if ((asoc->peers_rwnd <= 0) &&
(asoc->total_flight == 0) &&
(bundle_at == 1)) {
/* Mark the chunk as being a window probe */
SCTP_STAT_INCR(sctps_windowprobed);
}
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC2, 3);
#endif
data_list[i]->sent = SCTP_DATAGRAM_SENT;
data_list[i]->snd_count = 1;
data_list[i]->rec.data.chunk_was_revoked = 0;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_FLIGHT_LOG_UP,
data_list[i]->whoTo->flight_size,
data_list[i]->book_size,
(uintptr_t) data_list[i]->whoTo,
data_list[i]->rec.data.TSN_seq);
}
sctp_flight_size_increase(data_list[i]);
sctp_total_flight_increase(stcb, data_list[i]);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
}
asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
(uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
/* SWS sender side engages */
asoc->peers_rwnd = 0;
}
}
if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) {
(*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net);
}
}
static void
sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct sctp_tmit_chunk *chk, *nchk;
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
(chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) ||
(chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
(chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
(chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
(chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
(chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
(chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
(chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
/* Stray chunks must be cleaned up */
clean_up_anyway:
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
asoc->ctrl_queue_cnt--;
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)
asoc->fwd_tsn_cnt--;
sctp_free_a_chunk(stcb, chk, so_locked);
} else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
/* special handling, we must look into the param */
if (chk != asoc->str_reset) {
goto clean_up_anyway;
}
}
}
}
static int
sctp_can_we_split_this(struct sctp_tcb *stcb,
uint32_t length,
uint32_t goal_mtu, uint32_t frag_point, int eeor_on)
{
/*
* Make a decision on if I should split a msg into multiple parts.
* This is only asked of incomplete messages.
*/
if (eeor_on) {
/*
* If we are doing EEOR we need to always send it if its the
* entire thing, since it might be all the guy is putting in
* the hopper.
*/
if (goal_mtu >= length) {
/*-
* If we have data outstanding,
* we get another chance when the sack
* arrives to transmit - wait for more data
*/
if (stcb->asoc.total_flight == 0) {
/*
* If nothing is in flight, we zero the
* packet counter.
*/
return (length);
}
return (0);
} else {
/* You can fill the rest */
return (goal_mtu);
}
}
/*-
* For those strange folk that make the send buffer
* smaller than our fragmentation point, we can't
* get a full msg in so we have to allow splitting.
*/
if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) {
return (length);
}
if ((length <= goal_mtu) ||
((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) {
/* Sub-optimial residual don't split in non-eeor mode. */
return (0);
}
/*
* If we reach here length is larger than the goal_mtu. Do we wish
* to split it for the sake of packet putting together?
*/
if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) {
/* Its ok to split it */
return (min(goal_mtu, frag_point));
}
/* Nope, can't split */
return (0);
}
static uint32_t
sctp_move_to_outqueue(struct sctp_tcb *stcb,
struct sctp_stream_out *strq,
uint32_t goal_mtu,
uint32_t frag_point,
int *locked,
int *giveup,
int eeor_mode,
int *bail,
int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
/* Move from the stream to the send_queue keeping track of the total */
struct sctp_association *asoc;
struct sctp_stream_queue_pending *sp;
struct sctp_tmit_chunk *chk;
struct sctp_data_chunk *dchkh;
uint32_t to_move, length;
uint8_t rcv_flags = 0;
uint8_t some_taken;
uint8_t send_lock_up = 0;
SCTP_TCB_LOCK_ASSERT(stcb);
asoc = &stcb->asoc;
one_more_time:
/* sa_ignore FREED_MEMORY */
sp = TAILQ_FIRST(&strq->outqueue);
if (sp == NULL) {
*locked = 0;
if (send_lock_up == 0) {
SCTP_TCB_SEND_LOCK(stcb);
send_lock_up = 1;
}
sp = TAILQ_FIRST(&strq->outqueue);
if (sp) {
goto one_more_time;
}
if (strq->last_msg_incomplete) {
SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n",
strq->stream_no,
strq->last_msg_incomplete);
strq->last_msg_incomplete = 0;
}
to_move = 0;
if (send_lock_up) {
SCTP_TCB_SEND_UNLOCK(stcb);
send_lock_up = 0;
}
goto out_of;
}
if ((sp->msg_is_complete) && (sp->length == 0)) {
if (sp->sender_all_done) {
/*
* We are doing differed cleanup. Last time through
* when we took all the data the sender_all_done was
* not set.
*/
if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) {
SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
sp->sender_all_done,
sp->length,
sp->msg_is_complete,
sp->put_last_out,
send_lock_up);
}
if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) {
SCTP_TCB_SEND_LOCK(stcb);
send_lock_up = 1;
}
atomic_subtract_int(&asoc->stream_queue_cnt, 1);
TAILQ_REMOVE(&strq->outqueue, sp, next);
if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
(strq->chunks_on_queues == 0) &&
TAILQ_EMPTY(&strq->outqueue)) {
stcb->asoc.trigger_reset = 1;
}
stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
if (sp->net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
}
sctp_free_a_strmoq(stcb, sp, so_locked);
/* we can't be locked to it */
*locked = 0;
stcb->asoc.locked_on_sending = NULL;
if (send_lock_up) {
SCTP_TCB_SEND_UNLOCK(stcb);
send_lock_up = 0;
}
/* back to get the next msg */
goto one_more_time;
} else {
/*
* sender just finished this but still holds a
* reference
*/
*locked = 1;
*giveup = 1;
to_move = 0;
goto out_of;
}
} else {
/* is there some to get */
if (sp->length == 0) {
/* no */
*locked = 1;
*giveup = 1;
to_move = 0;
goto out_of;
} else if (sp->discard_rest) {
if (send_lock_up == 0) {
SCTP_TCB_SEND_LOCK(stcb);
send_lock_up = 1;
}
/* Whack down the size */
atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length);
if ((stcb->sctp_socket != NULL) && \
((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length);
}
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
sp->tail_mbuf = NULL;
}
sp->length = 0;
sp->some_taken = 1;
*locked = 1;
*giveup = 1;
to_move = 0;
goto out_of;
}
}
some_taken = sp->some_taken;
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
sp->msg_is_complete = 1;
}
re_look:
length = sp->length;
if (sp->msg_is_complete) {
/* The message is complete */
to_move = min(length, frag_point);
if (to_move == length) {
/* All of it fits in the MTU */
if (sp->some_taken) {
rcv_flags |= SCTP_DATA_LAST_FRAG;
sp->put_last_out = 1;
} else {
rcv_flags |= SCTP_DATA_NOT_FRAG;
sp->put_last_out = 1;
}
} else {
/* Not all of it fits, we fragment */
if (sp->some_taken == 0) {
rcv_flags |= SCTP_DATA_FIRST_FRAG;
}
sp->some_taken = 1;
}
} else {
to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode);
if (to_move) {
/*-
* We use a snapshot of length in case it
* is expanding during the compare.
*/
uint32_t llen;
llen = length;
if (to_move >= llen) {
to_move = llen;
if (send_lock_up == 0) {
/*-
* We are taking all of an incomplete msg
* thus we need a send lock.
*/
SCTP_TCB_SEND_LOCK(stcb);
send_lock_up = 1;
if (sp->msg_is_complete) {
/*
* the sender finished the
* msg
*/
goto re_look;
}
}
}
if (sp->some_taken == 0) {
rcv_flags |= SCTP_DATA_FIRST_FRAG;
sp->some_taken = 1;
}
} else {
/* Nothing to take. */
if (sp->some_taken) {
*locked = 1;
}
*giveup = 1;
to_move = 0;
goto out_of;
}
}
/* If we reach here, we can copy out a chunk */
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* No chunk memory */
*giveup = 1;
to_move = 0;
goto out_of;
}
/*
* Setup for unordered if needed by looking at the user sent info
* flags.
*/
if (sp->sinfo_flags & SCTP_UNORDERED) {
rcv_flags |= SCTP_DATA_UNORDERED;
}
if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) ||
((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) {
rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY;
}
/* clear out the chunk before setting up */
memset(chk, 0, sizeof(*chk));
chk->rec.data.rcv_flags = rcv_flags;
if (to_move >= length) {
/* we think we can steal the whole thing */
if ((sp->sender_all_done == 0) && (send_lock_up == 0)) {
SCTP_TCB_SEND_LOCK(stcb);
send_lock_up = 1;
}
if (to_move < sp->length) {
/* bail, it changed */
goto dont_do_it;
}
chk->data = sp->data;
chk->last_mbuf = sp->tail_mbuf;
/* register the stealing */
sp->data = sp->tail_mbuf = NULL;
} else {
struct mbuf *m;
dont_do_it:
chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT);
chk->last_mbuf = NULL;
if (chk->data == NULL) {
sp->some_taken = some_taken;
sctp_free_a_chunk(stcb, chk, so_locked);
*bail = 1;
to_move = 0;
goto out_of;
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY);
}
#endif
/* Pull off the data */
m_adj(sp->data, to_move);
/* Now lets work our way down and compact it */
m = sp->data;
while (m && (SCTP_BUF_LEN(m) == 0)) {
sp->data = SCTP_BUF_NEXT(m);
SCTP_BUF_NEXT(m) = NULL;
if (sp->tail_mbuf == m) {
/*-
* Freeing tail? TSNH since
* we supposedly were taking less
* than the sp->length.
*/
#ifdef INVARIANTS
panic("Huh, freing tail? - TSNH");
#else
SCTP_PRINTF("Huh, freeing tail? - TSNH\n");
sp->tail_mbuf = sp->data = NULL;
sp->length = 0;
#endif
}
sctp_m_free(m);
m = sp->data;
}
}
if (SCTP_BUF_IS_EXTENDED(chk->data)) {
chk->copy_by_ref = 1;
} else {
chk->copy_by_ref = 0;
}
/*
* get last_mbuf and counts of mb useage This is ugly but hopefully
* its only one mbuf.
*/
if (chk->last_mbuf == NULL) {
chk->last_mbuf = chk->data;
while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) {
chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf);
}
}
if (to_move > length) {
/*- This should not happen either
* since we always lower to_move to the size
* of sp->length if its larger.
*/
#ifdef INVARIANTS
panic("Huh, how can to_move be larger?");
#else
SCTP_PRINTF("Huh, how can to_move be larger?\n");
sp->length = 0;
#endif
} else {
atomic_subtract_int(&sp->length, to_move);
}
if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) {
/* Not enough room for a chunk header, get some */
struct mbuf *m;
m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA);
if (m == NULL) {
/*
* we're in trouble here. _PREPEND below will free
* all the data if there is no leading space, so we
* must put the data back and restore.
*/
if (send_lock_up == 0) {
SCTP_TCB_SEND_LOCK(stcb);
send_lock_up = 1;
}
if (sp->data == NULL) {
/* unsteal the data */
sp->data = chk->data;
sp->tail_mbuf = chk->last_mbuf;
} else {
struct mbuf *m_tmp;
/* reassemble the data */
m_tmp = sp->data;
sp->data = chk->data;
SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp;
}
sp->some_taken = some_taken;
atomic_add_int(&sp->length, to_move);
chk->data = NULL;
*bail = 1;
sctp_free_a_chunk(stcb, chk, so_locked);
to_move = 0;
goto out_of;
} else {
SCTP_BUF_LEN(m) = 0;
SCTP_BUF_NEXT(m) = chk->data;
chk->data = m;
M_ALIGN(chk->data, 4);
}
}
SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT);
if (chk->data == NULL) {
/* HELP, TSNH since we assured it would not above? */
#ifdef INVARIANTS
panic("prepend failes HELP?");
#else
SCTP_PRINTF("prepend fails HELP?\n");
sctp_free_a_chunk(stcb, chk, so_locked);
#endif
*bail = 1;
to_move = 0;
goto out_of;
}
sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk));
chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk));
chk->book_size_scale = 0;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->pad_inplace = 0;
chk->no_fr_allowed = 0;
chk->rec.data.stream_seq = strq->next_sequence_send;
if ((rcv_flags & SCTP_DATA_LAST_FRAG) &&
!(rcv_flags & SCTP_DATA_UNORDERED)) {
strq->next_sequence_send++;
}
chk->rec.data.stream_number = sp->stream;
chk->rec.data.payloadtype = sp->ppid;
chk->rec.data.context = sp->context;
chk->rec.data.doing_fast_retransmit = 0;
chk->rec.data.timetodrop = sp->ts;
chk->flags = sp->act_flags;
if (sp->net) {
chk->whoTo = sp->net;
atomic_add_int(&chk->whoTo->ref_count, 1);
} else
chk->whoTo = NULL;
if (sp->holds_key_ref) {
chk->auth_keyid = sp->auth_keyid;
sctp_auth_key_acquire(stcb, chk->auth_keyid);
chk->holds_key_ref = 1;
}
chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) {
sctp_misc_ints(SCTP_STRMOUT_LOG_SEND,
(uintptr_t) stcb, sp->length,
(uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq),
chk->rec.data.TSN_seq);
}
dchkh = mtod(chk->data, struct sctp_data_chunk *);
/*
* Put the rest of the things in place now. Size was done earlier in
* previous loop prior to padding.
*/
#ifdef SCTP_ASOCLOG_OF_TSNS
SCTP_TCB_LOCK_ASSERT(stcb);
if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) {
asoc->tsn_out_at = 0;
asoc->tsn_out_wrapped = 1;
}
asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq;
asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number;
asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq;
asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size;
asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags;
asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb;
asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at;
asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2;
asoc->tsn_out_at++;
#endif
dchkh->ch.chunk_type = SCTP_DATA;
dchkh->ch.chunk_flags = chk->rec.data.rcv_flags;
dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq);
dchkh->dp.stream_id = htons(strq->stream_no);
dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq);
dchkh->dp.protocol_id = chk->rec.data.payloadtype;
dchkh->ch.chunk_length = htons(chk->send_size);
/* Now advance the chk->send_size by the actual pad needed. */
if (chk->send_size < SCTP_SIZE32(chk->book_size)) {
/* need a pad */
struct mbuf *lm;
int pads;
pads = SCTP_SIZE32(chk->book_size) - chk->send_size;
lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf);
if (lm != NULL) {
chk->last_mbuf = lm;
chk->pad_inplace = 1;
}
chk->send_size += pads;
}
if (PR_SCTP_ENABLED(chk->flags)) {
asoc->pr_sctp_cnt++;
}
if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) {
/* All done pull and kill the message */
atomic_subtract_int(&asoc->stream_queue_cnt, 1);
if (sp->put_last_out == 0) {
SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n");
SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n",
sp->sender_all_done,
sp->length,
sp->msg_is_complete,
sp->put_last_out,
send_lock_up);
}
if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) {
SCTP_TCB_SEND_LOCK(stcb);
send_lock_up = 1;
}
TAILQ_REMOVE(&strq->outqueue, sp, next);
if ((strq->state == SCTP_STREAM_RESET_PENDING) &&
(strq->chunks_on_queues == 0) &&
TAILQ_EMPTY(&strq->outqueue)) {
stcb->asoc.trigger_reset = 1;
}
stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up);
if (sp->net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
}
sctp_free_a_strmoq(stcb, sp, so_locked);
/* we can't be locked to it */
*locked = 0;
stcb->asoc.locked_on_sending = NULL;
} else {
/* more to go, we are locked */
*locked = 1;
}
asoc->chunks_on_out_queue++;
strq->chunks_on_queues++;
TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next);
asoc->send_queue_cnt++;
out_of:
if (send_lock_up) {
SCTP_TCB_SEND_UNLOCK(stcb);
}
return (to_move);
}
static void
sctp_fill_outqueue(struct sctp_tcb *stcb,
struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct sctp_association *asoc;
struct sctp_stream_out *strq;
int goal_mtu, moved_how_much, total_moved = 0, bail = 0;
int locked, giveup;
SCTP_TCB_LOCK_ASSERT(stcb);
asoc = &stcb->asoc;
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
goal_mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
/* TSNH */
goal_mtu = net->mtu;
break;
}
/* Need an allowance for the data chunk header too */
goal_mtu -= sizeof(struct sctp_data_chunk);
/* must make even word boundary */
goal_mtu &= 0xfffffffc;
if (asoc->locked_on_sending) {
/* We are stuck on one stream until the message completes. */
strq = asoc->locked_on_sending;
locked = 1;
} else {
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
locked = 0;
}
while ((goal_mtu > 0) && strq) {
giveup = 0;
bail = 0;
moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked,
&giveup, eeor_mode, &bail, so_locked);
if (moved_how_much)
stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much);
if (locked) {
asoc->locked_on_sending = strq;
if ((moved_how_much == 0) || (giveup) || bail)
/* no more to move for now */
break;
} else {
asoc->locked_on_sending = NULL;
if ((giveup) || bail) {
break;
}
strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc);
if (strq == NULL) {
break;
}
}
total_moved += moved_how_much;
goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk));
goal_mtu &= 0xfffffffc;
}
if (bail)
*quit_now = 1;
stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc);
if (total_moved == 0) {
if ((stcb->asoc.sctp_cmt_on_off == 0) &&
(net == stcb->asoc.primary_destination)) {
/* ran dry for primary network net */
SCTP_STAT_INCR(sctps_primary_randry);
} else if (stcb->asoc.sctp_cmt_on_off > 0) {
/* ran dry with CMT on */
SCTP_STAT_INCR(sctps_cmt_randry);
}
}
}
void
sctp_fix_ecn_echo(struct sctp_association *asoc)
{
struct sctp_tmit_chunk *chk;
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
chk->sent = SCTP_DATAGRAM_UNSENT;
}
}
}
void
sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk;
struct sctp_stream_queue_pending *sp;
unsigned int i;
if (net == NULL) {
return;
}
asoc = &stcb->asoc;
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) {
if (sp->net == net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
}
}
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
if (chk->whoTo == net) {
sctp_free_remote_addr(chk->whoTo);
chk->whoTo = NULL;
}
}
}
int
sctp_med_chunk_output(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_association *asoc,
int *num_out,
int *reason_code,
int control_only, int from_where,
struct timeval *now, int *now_filled, int frag_point, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
/**
* Ok this is the generic chunk service queue. we must do the
* following: - Service the stream queue that is next, moving any
* message (note I must get a complete message i.e. FIRST/MIDDLE and
* LAST to the out queue in one pass) and assigning TSN's - Check to
* see if the cwnd/rwnd allows any output, if so we go ahead and
* fomulate and send the low level chunks. Making sure to combine
* any control in the control chunk queue also.
*/
struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL;
struct mbuf *outchain, *endoutchain;
struct sctp_tmit_chunk *chk, *nchk;
/* temp arrays for unlinking */
struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
int no_fragmentflg, error;
unsigned int max_rwnd_per_dest, max_send_per_dest;
int one_chunk, hbflag, skip_data_for_this_net;
int asconf, cookie, no_out_cnt;
int bundle_at, ctl_cnt, no_data_chunks, eeor_mode;
unsigned int mtu, r_mtu, omtu, mx_mtu, to_out;
int tsns_sent = 0;
uint32_t auth_offset = 0;
struct sctp_auth_chunk *auth = NULL;
uint16_t auth_keyid;
int override_ok = 1;
int skip_fill_up = 0;
int data_auth_reqd = 0;
/*
* JRS 5/14/07 - Add flag for whether a heartbeat is sent to the
* destination.
*/
int quit_now = 0;
*num_out = 0;
*reason_code = 0;
auth_keyid = stcb->asoc.authinfo.active_keyid;
if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) ||
(asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) ||
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
eeor_mode = 1;
} else {
eeor_mode = 0;
}
ctl_cnt = no_out_cnt = asconf = cookie = 0;
/*
* First lets prime the pump. For each destination, if there is room
* in the flight size, attempt to pull an MTU's worth out of the
* stream queues into the general send_queue
*/
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC2, 2);
#endif
SCTP_TCB_LOCK_ASSERT(stcb);
hbflag = 0;
if (control_only)
no_data_chunks = 1;
else
no_data_chunks = 0;
/* Nothing to possible to send? */
if ((TAILQ_EMPTY(&asoc->control_send_queue) ||
(asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) &&
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
TAILQ_EMPTY(&asoc->send_queue) &&
stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
nothing_to_send:
*reason_code = 9;
return (0);
}
if (asoc->peers_rwnd == 0) {
/* No room in peers rwnd */
*reason_code = 1;
if (asoc->total_flight > 0) {
/* we are allowed one chunk in flight */
no_data_chunks = 1;
}
}
if (stcb->asoc.ecn_echo_cnt_onq) {
/* Record where a sack goes, if any */
if (no_data_chunks &&
(asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) {
/* Nothing but ECNe to send - we don't do that */
goto nothing_to_send;
}
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
sack_goes_to = chk->whoTo;
break;
}
}
}
max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets);
if (stcb->sctp_socket)
max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets;
else
max_send_per_dest = 0;
if (no_data_chunks == 0) {
/* How many non-directed chunks are there? */
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
if (chk->whoTo == NULL) {
/*
* We already have non-directed chunks on
* the queue, no need to do a fill-up.
*/
skip_fill_up = 1;
break;
}
}
}
if ((no_data_chunks == 0) &&
(skip_fill_up == 0) &&
(!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) {
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
/*
* This for loop we are in takes in each net, if
* its's got space in cwnd and has data sent to it
* (when CMT is off) then it calls
* sctp_fill_outqueue for the net. This gets data on
* the send queue for that network.
*
* In sctp_fill_outqueue TSN's are assigned and data is
* copied out of the stream buffers. Note mostly
* copy by reference (we hope).
*/
net->window_probe = 0;
if ((net != stcb->asoc.alternate) &&
((net->dest_state & SCTP_ADDR_PF) ||
(!(net->dest_state & SCTP_ADDR_REACHABLE)) ||
(net->dest_state & SCTP_ADDR_UNCONFIRMED))) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, 1,
SCTP_CWND_LOG_FILL_OUTQ_CALLED);
}
continue;
}
if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) &&
(net->flight_size == 0)) {
(*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net);
}
if (net->flight_size >= net->cwnd) {
/* skip this network, no room - can't fill */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, 3,
SCTP_CWND_LOG_FILL_OUTQ_CALLED);
}
continue;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED);
}
sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked);
if (quit_now) {
/* memory alloc failure */
no_data_chunks = 1;
break;
}
}
}
/* now service each destination and send out what we can for it */
/* Nothing to send? */
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
TAILQ_EMPTY(&asoc->send_queue)) {
*reason_code = 8;
return (0);
}
if (asoc->sctp_cmt_on_off > 0) {
/* get the last start point */
start_at = asoc->last_net_cmt_send_started;
if (start_at == NULL) {
/* null so to beginning */
start_at = TAILQ_FIRST(&asoc->nets);
} else {
start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next);
if (start_at == NULL) {
start_at = TAILQ_FIRST(&asoc->nets);
}
}
asoc->last_net_cmt_send_started = start_at;
} else {
start_at = TAILQ_FIRST(&asoc->nets);
}
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if (chk->whoTo == NULL) {
if (asoc->alternate) {
chk->whoTo = asoc->alternate;
} else {
chk->whoTo = asoc->primary_destination;
}
atomic_add_int(&chk->whoTo->ref_count, 1);
}
}
old_start_at = NULL;
again_one_more_time:
for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) {
/* how much can we send? */
/* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */
if (old_start_at && (old_start_at == net)) {
/* through list ocmpletely. */
break;
}
tsns_sent = 0xa;
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
TAILQ_EMPTY(&asoc->asconf_send_queue) &&
(net->flight_size >= net->cwnd)) {
/*
* Nothing on control or asconf and flight is full,
* we can skip even in the CMT case.
*/
continue;
}
bundle_at = 0;
endoutchain = outchain = NULL;
no_fragmentflg = 1;
one_chunk = 0;
if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
skip_data_for_this_net = 1;
} else {
skip_data_for_this_net = 0;
}
if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) {
/*
* if we have a route and an ifp check to see if we
* have room to send to this guy
*/
struct ifnet *ifp;
ifp = net->ro.ro_rt->rt_ifp;
if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) {
SCTP_STAT_INCR(sctps_ifnomemqueued);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED);
}
continue;
}
}
switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
#ifdef INET
case AF_INET:
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
/* TSNH */
mtu = net->mtu;
break;
}
mx_mtu = mtu;
to_out = 0;
if (mtu > asoc->peers_rwnd) {
if (asoc->total_flight > 0) {
/* We have a packet in flight somewhere */
r_mtu = asoc->peers_rwnd;
} else {
/* We are always allowed to send one MTU out */
one_chunk = 1;
r_mtu = mtu;
}
} else {
r_mtu = mtu;
}
error = 0;
/************************/
/* ASCONF transmission */
/************************/
/* Now first lets go through the asconf queue */
TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
if (chk->rec.chunk_id.id != SCTP_ASCONF) {
continue;
}
if (chk->whoTo == NULL) {
if (asoc->alternate == NULL) {
if (asoc->primary_destination != net) {
break;
}
} else {
if (asoc->alternate != net) {
break;
}
}
} else {
if (chk->whoTo != net) {
break;
}
}
if (chk->data == NULL) {
break;
}
if (chk->sent != SCTP_DATAGRAM_UNSENT &&
chk->sent != SCTP_DATAGRAM_RESEND) {
break;
}
/*
* if no AUTH is yet included and this chunk
* requires it, make sure to account for it. We
* don't apply the size until the AUTH chunk is
* actually added below in case there is no room for
* this chunk. NOTE: we overload the use of "omtu"
* here
*/
if ((auth == NULL) &&
sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks)) {
omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
} else
omtu = 0;
/* Here we do NOT factor the r_mtu */
if ((chk->send_size < (int)(mtu - omtu)) ||
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
/*
* We probably should glom the mbuf chain
* from the chk->data for control but the
* problem is it becomes yet one more level
* of tracking to do if for some reason
* output fails. Then I have got to
* reconstruct the merged control chain.. el
* yucko.. for now we take the easy way and
* do the copy
*/
/*
* Add an AUTH chunk, if chunk requires it
* save the offset into the chain for AUTH
*/
if ((auth == NULL) &&
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks))) {
outchain = sctp_add_auth_chunk(outchain,
&endoutchain,
&auth,
&auth_offset,
stcb,
chk->rec.chunk_id.id);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
(int)chk->rec.chunk_id.can_take_data,
chk->send_size, chk->copy_by_ref);
if (outchain == NULL) {
*reason_code = 8;
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
/* update our MTU size */
if (mtu > (chk->send_size + omtu))
mtu -= (chk->send_size + omtu);
else
mtu = 0;
to_out += (chk->send_size + omtu);
/* Do clear IP_DF ? */
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
if (chk->rec.chunk_id.can_take_data)
chk->data = NULL;
/*
* set hb flag since we can use these for
* RTO
*/
hbflag = 1;
asconf = 1;
/*
* should sysctl this: don't bundle data
* with ASCONF since it requires AUTH
*/
no_data_chunks = 1;
chk->sent = SCTP_DATAGRAM_SENT;
if (chk->whoTo == NULL) {
chk->whoTo = net;
atomic_add_int(&net->ref_count, 1);
}
chk->snd_count++;
if (mtu == 0) {
/*
* Ok we are out of room but we can
* output without effecting the
* flight size since this little guy
* is a control only packet.
*/
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
/*
* do NOT clear the asconf flag as
* it is used to do appropriate
* source address selection.
*/
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(now);
*now_filled = 1;
}
net->last_sent_time = *now;
hbflag = 0;
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
outchain, auth_offset, auth,
stcb->asoc.authinfo.active_keyid,
no_fragmentflg, 0, asconf,
inp->sctp_lport, stcb->rport,
htonl(stcb->asoc.peer_vtag),
net->port, NULL,
0, 0,
so_locked))) {
/*
* error, we could not
* output
*/
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (from_where == 0) {
SCTP_STAT_INCR(sctps_lowlevelerrusr);
}
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
/* error, could not output */
if (error == EHOSTUNREACH) {
/*
* Destination went
* unreachable
* during this send
*/
sctp_move_chunks_from_net(stcb, net);
}
*reason_code = 7;
break;
} else {
asoc->ifp_had_enobuf = 0;
}
/*
* increase the number we sent, if a
* cookie is sent we don't tell them
* any was sent out.
*/
outchain = endoutchain = NULL;
auth = NULL;
auth_offset = 0;
if (!no_out_cnt)
*num_out += ctl_cnt;
/* recalc a clean slate and setup */
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
/* TSNH */
mtu = net->mtu;
break;
}
to_out = 0;
no_fragmentflg = 1;
}
}
}
if (error != 0) {
/* try next net */
continue;
}
/************************/
/* Control transmission */
/************************/
/* Now first lets go through the control queue */
TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
if ((sack_goes_to) &&
(chk->rec.chunk_id.id == SCTP_ECN_ECHO) &&
(chk->whoTo != sack_goes_to)) {
/*
* if we have a sack in queue, and we are
* looking at an ecn echo that is NOT queued
* to where the sack is going..
*/
if (chk->whoTo == net) {
/*
* Don't transmit it to where its
* going (current net)
*/
continue;
} else if (sack_goes_to == net) {
/*
* But do transmit it to this
* address
*/
goto skip_net_check;
}
}
if (chk->whoTo == NULL) {
if (asoc->alternate == NULL) {
if (asoc->primary_destination != net) {
continue;
}
} else {
if (asoc->alternate != net) {
continue;
}
}
} else {
if (chk->whoTo != net) {
continue;
}
}
skip_net_check:
if (chk->data == NULL) {
continue;
}
if (chk->sent != SCTP_DATAGRAM_UNSENT) {
/*
* It must be unsent. Cookies and ASCONF's
* hang around but there timers will force
* when marked for resend.
*/
continue;
}
/*
* if no AUTH is yet included and this chunk
* requires it, make sure to account for it. We
* don't apply the size until the AUTH chunk is
* actually added below in case there is no room for
* this chunk. NOTE: we overload the use of "omtu"
* here
*/
if ((auth == NULL) &&
sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks)) {
omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
} else
omtu = 0;
/* Here we do NOT factor the r_mtu */
if ((chk->send_size <= (int)(mtu - omtu)) ||
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
/*
* We probably should glom the mbuf chain
* from the chk->data for control but the
* problem is it becomes yet one more level
* of tracking to do if for some reason
* output fails. Then I have got to
* reconstruct the merged control chain.. el
* yucko.. for now we take the easy way and
* do the copy
*/
/*
* Add an AUTH chunk, if chunk requires it
* save the offset into the chain for AUTH
*/
if ((auth == NULL) &&
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks))) {
outchain = sctp_add_auth_chunk(outchain,
&endoutchain,
&auth,
&auth_offset,
stcb,
chk->rec.chunk_id.id);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain,
(int)chk->rec.chunk_id.can_take_data,
chk->send_size, chk->copy_by_ref);
if (outchain == NULL) {
*reason_code = 8;
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
/* update our MTU size */
if (mtu > (chk->send_size + omtu))
mtu -= (chk->send_size + omtu);
else
mtu = 0;
to_out += (chk->send_size + omtu);
/* Do clear IP_DF ? */
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
if (chk->rec.chunk_id.can_take_data)
chk->data = NULL;
/* Mark things to be removed, if needed */
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) ||
(chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) ||
(chk->rec.chunk_id.id == SCTP_SHUTDOWN) ||
(chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) ||
(chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) ||
(chk->rec.chunk_id.id == SCTP_COOKIE_ACK) ||
(chk->rec.chunk_id.id == SCTP_ECN_CWR) ||
(chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) ||
(chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) {
if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) {
hbflag = 1;
}
/* remove these chunks at the end */
if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) ||
(chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) {
/* turn off the timer */
if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
inp, stcb, net,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1);
}
}
ctl_cnt++;
} else {
/*
* Other chunks, since they have
* timers running (i.e. COOKIE) we
* just "trust" that it gets sent or
* retransmitted.
*/
ctl_cnt++;
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
cookie = 1;
no_out_cnt = 1;
} else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) {
/*
* Increment ecne send count
* here this means we may be
* over-zealous in our
* counting if the send
* fails, but its the best
* place to do it (we used
* to do it in the queue of
* the chunk, but that did
* not tell how many times
* it was sent.
*/
SCTP_STAT_INCR(sctps_sendecne);
}
chk->sent = SCTP_DATAGRAM_SENT;
if (chk->whoTo == NULL) {
chk->whoTo = net;
atomic_add_int(&net->ref_count, 1);
}
chk->snd_count++;
}
if (mtu == 0) {
/*
* Ok we are out of room but we can
* output without effecting the
* flight size since this little guy
* is a control only packet.
*/
if (asconf) {
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net);
/*
* do NOT clear the asconf
* flag as it is used to do
* appropriate source
* address selection.
*/
}
if (cookie) {
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
cookie = 0;
}
/* Only HB or ASCONF advances time */
if (hbflag) {
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(now);
*now_filled = 1;
}
net->last_sent_time = *now;
hbflag = 0;
}
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
outchain,
auth_offset, auth,
stcb->asoc.authinfo.active_keyid,
no_fragmentflg, 0, asconf,
inp->sctp_lport, stcb->rport,
htonl(stcb->asoc.peer_vtag),
net->port, NULL,
0, 0,
so_locked))) {
/*
* error, we could not
* output
*/
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (from_where == 0) {
SCTP_STAT_INCR(sctps_lowlevelerrusr);
}
if (error == ENOBUFS) {
asoc->ifp_had_enobuf = 1;
SCTP_STAT_INCR(sctps_lowlevelerr);
}
if (error == EHOSTUNREACH) {
/*
* Destination went
* unreachable
* during this send
*/
sctp_move_chunks_from_net(stcb, net);
}
*reason_code = 7;
break;
} else {
asoc->ifp_had_enobuf = 0;
}
/*
* increase the number we sent, if a
* cookie is sent we don't tell them
* any was sent out.
*/
outchain = endoutchain = NULL;
auth = NULL;
auth_offset = 0;
if (!no_out_cnt)
*num_out += ctl_cnt;
/* recalc a clean slate and setup */
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
/* TSNH */
mtu = net->mtu;
break;
}
to_out = 0;
no_fragmentflg = 1;
}
}
}
if (error != 0) {
/* try next net */
continue;
}
/* JRI: if dest is in PF state, do not send data to it */
if ((asoc->sctp_cmt_on_off > 0) &&
(net != stcb->asoc.alternate) &&
(net->dest_state & SCTP_ADDR_PF)) {
goto no_data_fill;
}
if (net->flight_size >= net->cwnd) {
goto no_data_fill;
}
if ((asoc->sctp_cmt_on_off > 0) &&
(SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) &&
(net->flight_size > max_rwnd_per_dest)) {
goto no_data_fill;
}
/*
* We need a specific accounting for the usage of the send
* buffer. We also need to check the number of messages per
* net. For now, this is better than nothing and it disabled
* by default...
*/
if ((asoc->sctp_cmt_on_off > 0) &&
(SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) &&
(max_send_per_dest > 0) &&
(net->flight_size > max_send_per_dest)) {
goto no_data_fill;
}
/*********************/
/* Data transmission */
/*********************/
/*
* if AUTH for DATA is required and no AUTH has been added
* yet, account for this in the mtu now... if no data can be
* bundled, this adjustment won't matter anyways since the
* packet will be going out...
*/
data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA,
stcb->asoc.peer_auth_chunks);
if (data_auth_reqd && (auth == NULL)) {
mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
}
/* now lets add any data within the MTU constraints */
switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) {
#ifdef INET
case AF_INET:
if (net->mtu > SCTP_MIN_V4_OVERHEAD)
omtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
else
omtu = 0;
break;
#endif
#ifdef INET6
case AF_INET6:
if (net->mtu > SCTP_MIN_OVERHEAD)
omtu = net->mtu - SCTP_MIN_OVERHEAD;
else
omtu = 0;
break;
#endif
default:
/* TSNH */
omtu = 0;
break;
}
if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) &&
(skip_data_for_this_net == 0)) ||
(cookie)) {
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
if (no_data_chunks) {
/* let only control go out */
*reason_code = 1;
break;
}
if (net->flight_size >= net->cwnd) {
/* skip this net, no room for data */
*reason_code = 2;
break;
}
if ((chk->whoTo != NULL) &&
(chk->whoTo != net)) {
/* Don't send the chunk on this net */
continue;
}
if (asoc->sctp_cmt_on_off == 0) {
if ((asoc->alternate) &&
(asoc->alternate != net) &&
(chk->whoTo == NULL)) {
continue;
} else if ((net != asoc->primary_destination) &&
(asoc->alternate == NULL) &&
(chk->whoTo == NULL)) {
continue;
}
}
if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) {
/*-
* strange, we have a chunk that is
* to big for its destination and
* yet no fragment ok flag.
* Something went wrong when the
* PMTU changed...we did not mark
* this chunk for some reason?? I
* will fix it here by letting IP
* fragment it for now and printing
* a warning. This really should not
* happen ...
*/
SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n",
chk->send_size, mtu);
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) &&
((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) {
struct sctp_data_chunk *dchkh;
dchkh = mtod(chk->data, struct sctp_data_chunk *);
dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY;
}
if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) ||
((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) {
/* ok we will add this one */
/*
* Add an AUTH chunk, if chunk
* requires it, save the offset into
* the chain for AUTH
*/
if (data_auth_reqd) {
if (auth == NULL) {
outchain = sctp_add_auth_chunk(outchain,
&endoutchain,
&auth,
&auth_offset,
stcb,
SCTP_DATA);
auth_keyid = chk->auth_keyid;
override_ok = 0;
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
} else if (override_ok) {
/*
* use this data's
* keyid
*/
auth_keyid = chk->auth_keyid;
override_ok = 0;
} else if (auth_keyid != chk->auth_keyid) {
/*
* different keyid,
* so done bundling
*/
break;
}
}
outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0,
chk->send_size, chk->copy_by_ref);
if (outchain == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n");
if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
}
*reason_code = 3;
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
/* upate our MTU size */
/* Do clear IP_DF ? */
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
/* unsigned subtraction of mtu */
if (mtu > chk->send_size)
mtu -= chk->send_size;
else
mtu = 0;
/* unsigned subtraction of r_mtu */
if (r_mtu > chk->send_size)
r_mtu -= chk->send_size;
else
r_mtu = 0;
to_out += chk->send_size;
if ((to_out > mx_mtu) && no_fragmentflg) {
#ifdef INVARIANTS
panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out);
#else
SCTP_PRINTF("Exceeding mtu of %d out size is %d\n",
mx_mtu, to_out);
#endif
}
chk->window_probe = 0;
data_list[bundle_at++] = chk;
if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
break;
}
if (chk->sent == SCTP_DATAGRAM_UNSENT) {
if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) {
SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks);
} else {
SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks);
}
if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) &&
((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0))
/*
* Count number of
* user msg's that
* were fragmented
* we do this by
* counting when we
* see a LAST
* fragment only.
*/
SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs);
}
if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) {
if ((one_chunk) && (stcb->asoc.total_flight == 0)) {
data_list[0]->window_probe = 1;
net->window_probe = 1;
}
break;
}
} else {
/*
* Must be sent in order of the
* TSN's (on a network)
*/
break;
}
} /* for (chunk gather loop for this net) */
} /* if asoc.state OPEN */
no_data_fill:
/* Is there something to send for this destination? */
if (outchain) {
/* We may need to start a control timer or two */
if (asconf) {
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp,
stcb, net);
/*
* do NOT clear the asconf flag as it is
* used to do appropriate source address
* selection.
*/
}
if (cookie) {
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net);
cookie = 0;
}
/* must start a send timer if data is being sent */
if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) {
/*
* no timer running on this destination
* restart it.
*/
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
}
if (bundle_at || hbflag) {
/* For data/asconf and hb set time */
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(now);
*now_filled = 1;
}
net->last_sent_time = *now;
}
/* Now send it, if there is anything to send :> */
if ((error = sctp_lowlevel_chunk_output(inp,
stcb,
net,
(struct sockaddr *)&net->ro._l_addr,
outchain,
auth_offset,
auth,
auth_keyid,
no_fragmentflg,
bundle_at,
asconf,
inp->sctp_lport, stcb->rport,
htonl(stcb->asoc.peer_vtag),
net->port, NULL,
0, 0,
so_locked))) {
/* error, we could not output */
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error);
if (from_where == 0) {
SCTP_STAT_INCR(sctps_lowlevelerrusr);
}
if (error == ENOBUFS) {
SCTP_STAT_INCR(sctps_lowlevelerr);
asoc->ifp_had_enobuf = 1;
}
if (error == EHOSTUNREACH) {
/*
* Destination went unreachable
* during this send
*/
sctp_move_chunks_from_net(stcb, net);
}
*reason_code = 6;
/*-
* I add this line to be paranoid. As far as
* I can tell the continue, takes us back to
* the top of the for, but just to make sure
* I will reset these again here.
*/
ctl_cnt = bundle_at = 0;
continue; /* This takes us back to the
* for() for the nets. */
} else {
asoc->ifp_had_enobuf = 0;
}
endoutchain = NULL;
auth = NULL;
auth_offset = 0;
if (!no_out_cnt) {
*num_out += (ctl_cnt + bundle_at);
}
if (bundle_at) {
/* setup for a RTO measurement */
tsns_sent = data_list[0]->rec.data.TSN_seq;
/* fill time if not already filled */
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
*now_filled = 1;
*now = asoc->time_last_sent;
} else {
asoc->time_last_sent = *now;
}
if (net->rto_needed) {
data_list[0]->do_rtt = 1;
net->rto_needed = 0;
}
SCTP_STAT_INCR_BY(sctps_senddata, bundle_at);
sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net);
}
if (one_chunk) {
break;
}
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND);
}
}
if (old_start_at == NULL) {
old_start_at = start_at;
start_at = TAILQ_FIRST(&asoc->nets);
if (old_start_at)
goto again_one_more_time;
}
/*
* At the end there should be no NON timed chunks hanging on this
* queue.
*/
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND);
}
if ((*num_out == 0) && (*reason_code == 0)) {
*reason_code = 4;
} else {
*reason_code = 5;
}
sctp_clean_up_ctl(stcb, asoc, so_locked);
return (0);
}
void
sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err)
{
/*-
* Prepend a OPERATIONAL_ERROR chunk header and put on the end of
* the control chunk queue.
*/
struct sctp_chunkhdr *hdr;
struct sctp_tmit_chunk *chk;
struct mbuf *mat, *last_mbuf;
uint32_t chunk_length;
uint16_t padding_length;
SCTP_TCB_LOCK_ASSERT(stcb);
SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT);
if (op_err == NULL) {
return;
}
last_mbuf = NULL;
chunk_length = 0;
for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) {
chunk_length += SCTP_BUF_LEN(mat);
if (SCTP_BUF_NEXT(mat) == NULL) {
last_mbuf = mat;
}
}
if (chunk_length > SCTP_MAX_CHUNK_LENGTH) {
sctp_m_freem(op_err);
return;
}
padding_length = chunk_length % 4;
if (padding_length != 0) {
padding_length = 4 - padding_length;
}
if (padding_length != 0) {
if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) {
sctp_m_freem(op_err);
return;
}
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* no memory */
sctp_m_freem(op_err);
return;
}
chk->copy_by_ref = 0;
chk->send_size = (uint16_t) chunk_length;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = op_err;
chk->whoTo = NULL;
hdr = mtod(op_err, struct sctp_chunkhdr *);
hdr->chunk_type = SCTP_OPERATION_ERROR;
hdr->chunk_flags = 0;
hdr->chunk_length = htons(chk->send_size);
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
}
int
sctp_send_cookie_echo(struct mbuf *m,
int offset,
struct sctp_tcb *stcb,
struct sctp_nets *net)
{
/*-
* pull out the cookie and put it at the front of the control chunk
* queue.
*/
int at;
struct mbuf *cookie;
struct sctp_paramhdr parm, *phdr;
struct sctp_chunkhdr *hdr;
struct sctp_tmit_chunk *chk;
uint16_t ptype, plen;
SCTP_TCB_LOCK_ASSERT(stcb);
/* First find the cookie in the param area */
cookie = NULL;
at = offset + sizeof(struct sctp_init_chunk);
for (;;) {
phdr = sctp_get_next_param(m, at, &parm, sizeof(parm));
if (phdr == NULL) {
return (-3);
}
ptype = ntohs(phdr->param_type);
plen = ntohs(phdr->param_length);
if (ptype == SCTP_STATE_COOKIE) {
int pad;
/* found the cookie */
if ((pad = (plen % 4))) {
plen += 4 - pad;
}
cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT);
if (cookie == NULL) {
/* No memory */
return (-2);
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(cookie, SCTP_MBUF_ICOPY);
}
#endif
break;
}
at += SCTP_SIZE32(plen);
}
/* ok, we got the cookie lets change it into a cookie echo chunk */
/* first the change from param to cookie */
hdr = mtod(cookie, struct sctp_chunkhdr *);
hdr->chunk_type = SCTP_COOKIE_ECHO;
hdr->chunk_flags = 0;
/* get the chunk stuff now and place it in the FRONT of the queue */
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* no memory */
sctp_m_freem(cookie);
return (-5);
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_COOKIE_ECHO;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
chk->send_size = plen;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = cookie;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return (0);
}
void
sctp_send_heartbeat_ack(struct sctp_tcb *stcb,
struct mbuf *m,
int offset,
int chk_length,
struct sctp_nets *net)
{
/*
* take a HB request and make it into a HB ack and send it.
*/
struct mbuf *outchain;
struct sctp_chunkhdr *chdr;
struct sctp_tmit_chunk *chk;
if (net == NULL)
/* must have a net pointer */
return;
outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT);
if (outchain == NULL) {
/* gak out of memory */
return;
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(outchain, SCTP_MBUF_ICOPY);
}
#endif
chdr = mtod(outchain, struct sctp_chunkhdr *);
chdr->chunk_type = SCTP_HEARTBEAT_ACK;
chdr->chunk_flags = 0;
if (chk_length % 4) {
/* need pad */
uint32_t cpthis = 0;
int padlen;
padlen = 4 - (chk_length % 4);
m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis);
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* no memory */
sctp_m_freem(outchain);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->send_size = chk_length;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = outchain;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
}
void
sctp_send_cookie_ack(struct sctp_tcb *stcb)
{
/* formulate and queue a cookie-ack back to sender */
struct mbuf *cookie_ack;
struct sctp_chunkhdr *hdr;
struct sctp_tmit_chunk *chk;
SCTP_TCB_LOCK_ASSERT(stcb);
cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
if (cookie_ack == NULL) {
/* no mbuf's */
return;
}
SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD);
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* no memory */
sctp_m_freem(cookie_ack);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_COOKIE_ACK;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->send_size = sizeof(struct sctp_chunkhdr);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->data = cookie_ack;
if (chk->asoc->last_control_chunk_from != NULL) {
chk->whoTo = chk->asoc->last_control_chunk_from;
atomic_add_int(&chk->whoTo->ref_count, 1);
} else {
chk->whoTo = NULL;
}
hdr = mtod(cookie_ack, struct sctp_chunkhdr *);
hdr->chunk_type = SCTP_COOKIE_ACK;
hdr->chunk_flags = 0;
hdr->chunk_length = htons(chk->send_size);
SCTP_BUF_LEN(cookie_ack) = chk->send_size;
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return;
}
void
sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net)
{
/* formulate and queue a SHUTDOWN-ACK back to the sender */
struct mbuf *m_shutdown_ack;
struct sctp_shutdown_ack_chunk *ack_cp;
struct sctp_tmit_chunk *chk;
m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER);
if (m_shutdown_ack == NULL) {
/* no mbuf's */
return;
}
SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD);
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* no memory */
sctp_m_freem(m_shutdown_ack);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->send_size = sizeof(struct sctp_chunkhdr);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->data = m_shutdown_ack;
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *);
ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK;
ack_cp->ch.chunk_flags = 0;
ack_cp->ch.chunk_length = htons(chk->send_size);
SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size;
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return;
}
void
sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net)
{
/* formulate and queue a SHUTDOWN to the sender */
struct mbuf *m_shutdown;
struct sctp_shutdown_chunk *shutdown_cp;
struct sctp_tmit_chunk *chk;
m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER);
if (m_shutdown == NULL) {
/* no mbuf's */
return;
}
SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD);
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* no memory */
sctp_m_freem(m_shutdown);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_SHUTDOWN;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->send_size = sizeof(struct sctp_shutdown_chunk);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->data = m_shutdown;
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *);
shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN;
shutdown_cp->ch.chunk_flags = 0;
shutdown_cp->ch.chunk_length = htons(chk->send_size);
shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn);
SCTP_BUF_LEN(m_shutdown) = chk->send_size;
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return;
}
void
sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked)
{
/*
* formulate and queue an ASCONF to the peer. ASCONF parameters
* should be queued on the assoc queue.
*/
struct sctp_tmit_chunk *chk;
struct mbuf *m_asconf;
int len;
SCTP_TCB_LOCK_ASSERT(stcb);
if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) &&
(!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) {
/* can't send a new one if there is one in flight already */
return;
}
/* compose an ASCONF chunk, maximum length is PMTU */
m_asconf = sctp_compose_asconf(stcb, &len, addr_locked);
if (m_asconf == NULL) {
return;
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* no memory */
sctp_m_freem(m_asconf);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_ASCONF;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
chk->data = m_asconf;
chk->send_size = len;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
return;
}
void
sctp_send_asconf_ack(struct sctp_tcb *stcb)
{
/*
* formulate and queue a asconf-ack back to sender. the asconf-ack
* must be stored in the tcb.
*/
struct sctp_tmit_chunk *chk;
struct sctp_asconf_ack *ack, *latest_ack;
struct mbuf *m_ack;
struct sctp_nets *net = NULL;
SCTP_TCB_LOCK_ASSERT(stcb);
/* Get the latest ASCONF-ACK */
latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead);
if (latest_ack == NULL) {
return;
}
if (latest_ack->last_sent_to != NULL &&
latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) {
/* we're doing a retransmission */
net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0);
if (net == NULL) {
/* no alternate */
if (stcb->asoc.last_control_chunk_from == NULL) {
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
} else {
net = stcb->asoc.last_control_chunk_from;
}
}
} else {
/* normal case */
if (stcb->asoc.last_control_chunk_from == NULL) {
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
} else {
net = stcb->asoc.last_control_chunk_from;
}
}
latest_ack->last_sent_to = net;
TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) {
if (ack->data == NULL) {
continue;
}
/* copy the asconf_ack */
m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT);
if (m_ack == NULL) {
/* couldn't copy it */
return;
}
#ifdef SCTP_MBUF_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY);
}
#endif
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/* no memory */
if (m_ack)
sctp_m_freem(m_ack);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_ASCONF_ACK;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = CHUNK_FLAGS_FRAGMENT_OK;
chk->whoTo = net;
if (chk->whoTo) {
atomic_add_int(&chk->whoTo->ref_count, 1);
}
chk->data = m_ack;
chk->send_size = ack->len;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->asoc = &stcb->asoc;
TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next);
chk->asoc->ctrl_queue_cnt++;
}
return;
}
static int
sctp_chunk_retransmission(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_association *asoc,
int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
/*-
* send out one MTU of retransmission. If fast_retransmit is
* happening we ignore the cwnd. Otherwise we obey the cwnd and
* rwnd. For a Cookie or Asconf in the control chunk queue we
* retransmit them by themselves.
*
* For data chunks we will pick out the lowest TSN's in the sent_queue
* marked for resend and bundle them all together (up to a MTU of
* destination). The address to send to should have been
* selected/changed where the retransmission was marked (i.e. in FR
* or t3-timeout routines).
*/
struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING];
struct sctp_tmit_chunk *chk, *fwd;
struct mbuf *m, *endofchain;
struct sctp_nets *net = NULL;
uint32_t tsns_sent = 0;
int no_fragmentflg, bundle_at, cnt_thru;
unsigned int mtu;
int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started;
struct sctp_auth_chunk *auth = NULL;
uint32_t auth_offset = 0;
uint16_t auth_keyid;
int override_ok = 1;
int data_auth_reqd = 0;
uint32_t dmtu = 0;
SCTP_TCB_LOCK_ASSERT(stcb);
tmr_started = ctl_cnt = bundle_at = error = 0;
no_fragmentflg = 1;
fwd_tsn = 0;
*cnt_out = 0;
fwd = NULL;
endofchain = m = NULL;
auth_keyid = stcb->asoc.authinfo.active_keyid;
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC3, 1);
#endif
if ((TAILQ_EMPTY(&asoc->sent_queue)) &&
(TAILQ_EMPTY(&asoc->control_send_queue))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n",
asoc->sent_queue_retran_cnt);
asoc->sent_queue_cnt = 0;
asoc->sent_queue_cnt_removeable = 0;
/* send back 0/0 so we enter normal transmission */
*cnt_out = 0;
return (0);
}
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) ||
(chk->rec.chunk_id.id == SCTP_STREAM_RESET) ||
(chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) {
if (chk->sent != SCTP_DATAGRAM_RESEND) {
continue;
}
if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) {
if (chk != asoc->str_reset) {
/*
* not eligible for retran if its
* not ours
*/
continue;
}
}
ctl_cnt++;
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
fwd_tsn = 1;
}
/*
* Add an AUTH chunk, if chunk requires it save the
* offset into the chain for AUTH
*/
if ((auth == NULL) &&
(sctp_auth_is_required_chunk(chk->rec.chunk_id.id,
stcb->asoc.peer_auth_chunks))) {
m = sctp_add_auth_chunk(m, &endofchain,
&auth, &auth_offset,
stcb,
chk->rec.chunk_id.id);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
break;
}
}
one_chunk = 0;
cnt_thru = 0;
/* do we have control chunks to retransmit? */
if (m != NULL) {
/* Start a timer no matter if we suceed or fail */
if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo);
} else if (chk->rec.chunk_id.id == SCTP_ASCONF)
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo);
chk->snd_count++; /* update our count */
if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo,
(struct sockaddr *)&chk->whoTo->ro._l_addr, m,
auth_offset, auth, stcb->asoc.authinfo.active_keyid,
no_fragmentflg, 0, 0,
inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
chk->whoTo->port, NULL,
0, 0,
so_locked))) {
SCTP_STAT_INCR(sctps_lowlevelerr);
return (error);
}
endofchain = NULL;
auth = NULL;
auth_offset = 0;
/*
* We don't want to mark the net->sent time here since this
* we use this for HB and retrans cannot measure RTT
*/
/* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */
*cnt_out += 1;
chk->sent = SCTP_DATAGRAM_SENT;
sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt);
if (fwd_tsn == 0) {
return (0);
} else {
/* Clean up the fwd-tsn list */
sctp_clean_up_ctl(stcb, asoc, so_locked);
return (0);
}
}
/*
* Ok, it is just data retransmission we need to do or that and a
* fwd-tsn with it all.
*/
if (TAILQ_EMPTY(&asoc->sent_queue)) {
return (SCTP_RETRAN_DONE);
}
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) {
/* not yet open, resend the cookie and that is it */
return (1);
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(20, inp, stcb, NULL);
#endif
data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks);
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
if (chk->sent != SCTP_DATAGRAM_RESEND) {
/* No, not sent to this net or not ready for rtx */
continue;
}
if (chk->data == NULL) {
SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n",
chk->rec.data.TSN_seq, chk->snd_count, chk->sent);
continue;
}
if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) &&
(chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) {
struct mbuf *op_err;
char msg[SCTP_DIAG_INFO_LEN];
snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up",
chk->rec.data.TSN_seq, chk->snd_count);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
atomic_add_int(&stcb->asoc.refcnt, 1);
sctp_abort_an_association(stcb->sctp_ep, stcb, op_err,
so_locked);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
return (SCTP_RETRAN_EXIT);
}
/* pick up the net */
net = chk->whoTo;
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
mtu = net->mtu - SCTP_MIN_V4_OVERHEAD;
break;
#endif
#ifdef INET6
case AF_INET6:
mtu = net->mtu - SCTP_MIN_OVERHEAD;
break;
#endif
default:
/* TSNH */
mtu = net->mtu;
break;
}
if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) {
/* No room in peers rwnd */
uint32_t tsn;
tsn = asoc->last_acked_seq + 1;
if (tsn == chk->rec.data.TSN_seq) {
/*
* we make a special exception for this
* case. The peer has no rwnd but is missing
* the lowest chunk.. which is probably what
* is holding up the rwnd.
*/
goto one_chunk_around;
}
return (1);
}
one_chunk_around:
if (asoc->peers_rwnd < mtu) {
one_chunk = 1;
if ((asoc->peers_rwnd == 0) &&
(asoc->total_flight == 0)) {
chk->window_probe = 1;
chk->whoTo->window_probe = 1;
}
}
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC3, 2);
#endif
bundle_at = 0;
m = NULL;
net->fast_retran_ip = 0;
if (chk->rec.data.doing_fast_retransmit == 0) {
/*
* if no FR in progress skip destination that have
* flight_size > cwnd.
*/
if (net->flight_size >= net->cwnd) {
continue;
}
} else {
/*
* Mark the destination net to have FR recovery
* limits put on it.
*/
*fr_done = 1;
net->fast_retran_ip = 1;
}
/*
* if no AUTH is yet included and this chunk requires it,
* make sure to account for it. We don't apply the size
* until the AUTH chunk is actually added below in case
* there is no room for this chunk.
*/
if (data_auth_reqd && (auth == NULL)) {
dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
} else
dmtu = 0;
if ((chk->send_size <= (mtu - dmtu)) ||
(chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) {
/* ok we will add this one */
if (data_auth_reqd) {
if (auth == NULL) {
m = sctp_add_auth_chunk(m,
&endofchain,
&auth,
&auth_offset,
stcb,
SCTP_DATA);
auth_keyid = chk->auth_keyid;
override_ok = 0;
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
} else if (override_ok) {
auth_keyid = chk->auth_keyid;
override_ok = 0;
} else if (chk->auth_keyid != auth_keyid) {
/* different keyid, so done bundling */
break;
}
}
m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref);
if (m == NULL) {
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
/* Do clear IP_DF ? */
if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
/* upate our MTU size */
if (mtu > (chk->send_size + dmtu))
mtu -= (chk->send_size + dmtu);
else
mtu = 0;
data_list[bundle_at++] = chk;
if (one_chunk && (asoc->total_flight <= 0)) {
SCTP_STAT_INCR(sctps_windowprobed);
}
}
if (one_chunk == 0) {
/*
* now are there anymore forward from chk to pick
* up?
*/
for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) {
if (fwd->sent != SCTP_DATAGRAM_RESEND) {
/* Nope, not for retran */
continue;
}
if (fwd->whoTo != net) {
/* Nope, not the net in question */
continue;
}
if (data_auth_reqd && (auth == NULL)) {
dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id);
} else
dmtu = 0;
if (fwd->send_size <= (mtu - dmtu)) {
if (data_auth_reqd) {
if (auth == NULL) {
m = sctp_add_auth_chunk(m,
&endofchain,
&auth,
&auth_offset,
stcb,
SCTP_DATA);
auth_keyid = fwd->auth_keyid;
override_ok = 0;
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
} else if (override_ok) {
auth_keyid = fwd->auth_keyid;
override_ok = 0;
} else if (fwd->auth_keyid != auth_keyid) {
/*
* different keyid,
* so done bundling
*/
break;
}
}
m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref);
if (m == NULL) {
SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
/* Do clear IP_DF ? */
if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) {
no_fragmentflg = 0;
}
/* upate our MTU size */
if (mtu > (fwd->send_size + dmtu))
mtu -= (fwd->send_size + dmtu);
else
mtu = 0;
data_list[bundle_at++] = fwd;
if (bundle_at >= SCTP_MAX_DATA_BUNDLING) {
break;
}
} else {
/* can't fit so we are done */
break;
}
}
}
/* Is there something to send for this destination? */
if (m) {
/*
* No matter if we fail/or suceed we should start a
* timer. A failure is like a lost IP packet :-)
*/
if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
/*
* no timer running on this destination
* restart it.
*/
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
tmr_started = 1;
}
/* Now lets send it, if there is anything to send :> */
if ((error = sctp_lowlevel_chunk_output(inp, stcb, net,
(struct sockaddr *)&net->ro._l_addr, m,
auth_offset, auth, auth_keyid,
no_fragmentflg, 0, 0,
inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag),
net->port, NULL,
0, 0,
so_locked))) {
/* error, we could not output */
SCTP_STAT_INCR(sctps_lowlevelerr);
return (error);
}
endofchain = NULL;
auth = NULL;
auth_offset = 0;
/* For HB's */
/*
* We don't want to mark the net->sent time here
* since this we use this for HB and retrans cannot
* measure RTT
*/
/* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */
/* For auto-close */
cnt_thru++;
if (*now_filled == 0) {
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent);
*now = asoc->time_last_sent;
*now_filled = 1;
} else {
asoc->time_last_sent = *now;
}
*cnt_out += bundle_at;
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xC4, bundle_at);
#endif
if (bundle_at) {
tsns_sent = data_list[0]->rec.data.TSN_seq;
}
for (i = 0; i < bundle_at; i++) {
SCTP_STAT_INCR(sctps_sendretransdata);
data_list[i]->sent = SCTP_DATAGRAM_SENT;
/*
* When we have a revoked data, and we
* retransmit it, then we clear the revoked
* flag since this flag dictates if we
* subtracted from the fs
*/
if (data_list[i]->rec.data.chunk_was_revoked) {
/* Deflate the cwnd */
data_list[i]->whoTo->cwnd -= data_list[i]->book_size;
data_list[i]->rec.data.chunk_was_revoked = 0;
}
data_list[i]->snd_count++;
sctp_ucount_decr(asoc->sent_queue_retran_cnt);
/* record the time */
data_list[i]->sent_rcv_time = asoc->time_last_sent;
if (data_list[i]->book_size_scale) {
/*
* need to double the book size on
* this one
*/
data_list[i]->book_size_scale = 0;
/*
* Since we double the booksize, we
* must also double the output queue
* size, since this get shrunk when
* we free by this amount.
*/
atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size);
data_list[i]->book_size *= 2;
} else {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) {
sctp_log_rwnd(SCTP_DECREASE_PEER_RWND,
asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh));
}
asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd,
(uint32_t) (data_list[i]->send_size +
SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)));
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND,
data_list[i]->whoTo->flight_size,
data_list[i]->book_size,
(uintptr_t) data_list[i]->whoTo,
data_list[i]->rec.data.TSN_seq);
}
sctp_flight_size_increase(data_list[i]);
sctp_total_flight_increase(stcb, data_list[i]);
if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
/* SWS sender side engages */
asoc->peers_rwnd = 0;
}
if ((i == 0) &&
(data_list[i]->rec.data.doing_fast_retransmit)) {
SCTP_STAT_INCR(sctps_sendfastretrans);
if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) &&
(tmr_started == 0)) {
/*-
* ok we just fast-retrans'd
* the lowest TSN, i.e the
* first on the list. In
* this case we want to give
* some more time to get a
* SACK back without a
* t3-expiring.
*/
sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2);
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net);
}
}
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND);
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(21, inp, stcb, NULL);
#endif
} else {
/* None will fit */
return (1);
}
if (asoc->sent_queue_retran_cnt <= 0) {
/* all done we have no more to retran */
asoc->sent_queue_retran_cnt = 0;
break;
}
if (one_chunk) {
/* No more room in rwnd */
return (1);
}
/* stop the for loop here. we sent out a packet */
break;
}
return (0);
}
static void
sctp_timer_validation(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_association *asoc)
{
struct sctp_nets *net;
/* Validate that a timer is running somewhere */
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) {
/* Here is a timer */
return;
}
}
SCTP_TCB_LOCK_ASSERT(stcb);
/* Gak, we did not have a timer somewhere */
SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n");
if (asoc->alternate) {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate);
} else {
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination);
}
return;
}
void
sctp_chunk_output(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
int from_where,
int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
/*-
* Ok this is the generic chunk service queue. we must do the
* following:
* - See if there are retransmits pending, if so we must
* do these first.
* - Service the stream queue that is next, moving any
* message (note I must get a complete message i.e.
* FIRST/MIDDLE and LAST to the out queue in one pass) and assigning
* TSN's
* - Check to see if the cwnd/rwnd allows any output, if so we
* go ahead and fomulate and send the low level chunks. Making sure
* to combine any control in the control chunk queue also.
*/
struct sctp_association *asoc;
struct sctp_nets *net;
int error = 0, num_out, tot_out = 0, ret = 0, reason_code;
unsigned int burst_cnt = 0;
struct timeval now;
int now_filled = 0;
int nagle_on;
int frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
int un_sent = 0;
int fr_done;
unsigned int tot_frs = 0;
asoc = &stcb->asoc;
do_it_again:
/* The Nagle algorithm is only applied when handling a send call. */
if (from_where == SCTP_OUTPUT_FROM_USR_SEND) {
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) {
nagle_on = 0;
} else {
nagle_on = 1;
}
} else {
nagle_on = 0;
}
SCTP_TCB_LOCK_ASSERT(stcb);
un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
if ((un_sent <= 0) &&
(TAILQ_EMPTY(&asoc->control_send_queue)) &&
(TAILQ_EMPTY(&asoc->asconf_send_queue)) &&
(asoc->sent_queue_retran_cnt == 0) &&
(asoc->trigger_reset == 0)) {
/* Nothing to do unless there is something to be sent left */
return;
}
/*
* Do we have something to send, data or control AND a sack timer
* running, if so piggy-back the sack.
*/
if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) {
sctp_send_sack(stcb, so_locked);
(void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
}
while (asoc->sent_queue_retran_cnt) {
/*-
* Ok, it is retransmission time only, we send out only ONE
* packet with a single call off to the retran code.
*/
if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) {
/*-
* Special hook for handling cookiess discarded
* by peer that carried data. Send cookie-ack only
* and then the next call with get the retran's.
*/
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
from_where,
&now, &now_filled, frag_point, so_locked);
return;
} else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) {
/* if its not from a HB then do it */
fr_done = 0;
ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked);
if (fr_done) {
tot_frs++;
}
} else {
/*
* its from any other place, we don't allow retran
* output (only control)
*/
ret = 1;
}
if (ret > 0) {
/* Can't send anymore */
/*-
* now lets push out control by calling med-level
* output once. this assures that we WILL send HB's
* if queued too.
*/
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1,
from_where,
&now, &now_filled, frag_point, so_locked);
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(8, inp, stcb, NULL);
#endif
sctp_timer_validation(inp, stcb, asoc);
return;
}
if (ret < 0) {
/*-
* The count was off.. retran is not happening so do
* the normal retransmission.
*/
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(9, inp, stcb, NULL);
#endif
if (ret == SCTP_RETRAN_EXIT) {
return;
}
break;
}
if (from_where == SCTP_OUTPUT_FROM_T3) {
/* Only one transmission allowed out of a timeout */
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(10, inp, stcb, NULL);
#endif
/* Push out any control */
(void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where,
&now, &now_filled, frag_point, so_locked);
return;
}
if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) {
/* Hit FR burst limit */
return;
}
if ((num_out == 0) && (ret == 0)) {
/* No more retrans to send */
break;
}
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(12, inp, stcb, NULL);
#endif
/* Check for bad destinations, if they exist move chunks around. */
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
if (!(net->dest_state & SCTP_ADDR_REACHABLE)) {
/*-
* if possible move things off of this address we
* still may send below due to the dormant state but
* we try to find an alternate address to send to
* and if we have one we move all queued data on the
* out wheel to this alternate address.
*/
if (net->ref_count > 1)
sctp_move_chunks_from_net(stcb, net);
} else {
/*-
* if ((asoc->sat_network) || (net->addr_is_local))
* { burst_limit = asoc->max_burst *
* SCTP_SAT_NETWORK_BURST_INCR; }
*/
if (asoc->max_burst > 0) {
if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) {
if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) {
/*
* JRS - Use the congestion
* control given in the
* congestion control module
*/
asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED);
}
SCTP_STAT_INCR(sctps_maxburstqueued);
}
net->fast_retran_ip = 0;
} else {
if (net->flight_size == 0) {
/*
* Should be decaying the
* cwnd here
*/
;
}
}
}
}
}
burst_cnt = 0;
do {
error = sctp_med_chunk_output(inp, stcb, asoc, &num_out,
&reason_code, 0, from_where,
&now, &now_filled, frag_point, so_locked);
if (error) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP);
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES);
sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES);
}
break;
}
SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out);
tot_out += num_out;
burst_cnt++;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES);
if (num_out == 0) {
sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES);
}
}
if (nagle_on) {
/*
* When the Nagle algorithm is used, look at how
* much is unsent, then if its smaller than an MTU
* and we have data in flight we stop, except if we
* are handling a fragmented user message.
*/
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) &&
(stcb->asoc.total_flight > 0) &&
((stcb->asoc.locked_on_sending == NULL) ||
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) {
break;
}
}
if (TAILQ_EMPTY(&asoc->control_send_queue) &&
TAILQ_EMPTY(&asoc->send_queue) &&
stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
/* Nothing left to send */
break;
}
if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) {
/* Nothing left to send */
break;
}
} while (num_out &&
((asoc->max_burst == 0) ||
SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) ||
(burst_cnt < asoc->max_burst)));
if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) {
if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) {
SCTP_STAT_INCR(sctps_maxburstqueued);
asoc->burst_limit_applied = 1;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) {
sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED);
}
} else {
asoc->burst_limit_applied = 0;
}
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) {
sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES);
}
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n",
tot_out);
/*-
* Now we need to clean up the control chunk chain if a ECNE is on
* it. It must be marked as UNSENT again so next call will continue
* to send it until such time that we get a CWR, to remove it.
*/
if (stcb->asoc.ecn_echo_cnt_onq)
sctp_fix_ecn_echo(asoc);
if (stcb->asoc.trigger_reset) {
if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) {
goto do_it_again;
}
}
return;
}
int
sctp_output(
struct sctp_inpcb *inp,
struct mbuf *m,
struct sockaddr *addr,
struct mbuf *control,
struct thread *p,
int flags)
{
if (inp == NULL) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
if (inp->sctp_socket == NULL) {
SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
return (sctp_sosend(inp->sctp_socket,
addr,
(struct uio *)NULL,
m,
control,
flags, p
));
}
void
send_forward_tsn(struct sctp_tcb *stcb,
struct sctp_association *asoc)
{
struct sctp_tmit_chunk *chk;
struct sctp_forward_tsn_chunk *fwdtsn;
uint32_t advance_peer_ack_point;
SCTP_TCB_LOCK_ASSERT(stcb);
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) {
/* mark it to unsent */
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
/* Do we correct its output location? */
if (chk->whoTo) {
sctp_free_remote_addr(chk->whoTo);
chk->whoTo = NULL;
}
goto sctp_fill_in_rest;
}
}
/* Ok if we reach here we must build one */
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return;
}
asoc->fwd_tsn_cnt++;
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = asoc;
chk->whoTo = NULL;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt++;
sctp_fill_in_rest:
/*-
* Here we go through and fill out the part that deals with
* stream/seq of the ones we skip.
*/
SCTP_BUF_LEN(chk->data) = 0;
{
struct sctp_tmit_chunk *at, *tp1, *last;
struct sctp_strseq *strseq;
unsigned int cnt_of_space, i, ovh;
unsigned int space_needed;
unsigned int cnt_of_skipped = 0;
TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) {
if ((at->sent != SCTP_FORWARD_TSN_SKIP) &&
(at->sent != SCTP_DATAGRAM_NR_ACKED)) {
/* no more to look at */
break;
}
if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
/* We don't report these */
continue;
}
cnt_of_skipped++;
}
space_needed = (sizeof(struct sctp_forward_tsn_chunk) +
(cnt_of_skipped * sizeof(struct sctp_strseq)));
cnt_of_space = M_TRAILINGSPACE(chk->data);
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
ovh = SCTP_MIN_OVERHEAD;
} else {
ovh = SCTP_MIN_V4_OVERHEAD;
}
if (cnt_of_space > (asoc->smallest_mtu - ovh)) {
/* trim to a mtu size */
cnt_of_space = asoc->smallest_mtu - ovh;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
0xff, 0, cnt_of_skipped,
asoc->advanced_peer_ack_point);
}
advance_peer_ack_point = asoc->advanced_peer_ack_point;
if (cnt_of_space < space_needed) {
/*-
* ok we must trim down the chunk by lowering the
* advance peer ack point.
*/
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
0xff, 0xff, cnt_of_space,
space_needed);
}
cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk);
cnt_of_skipped /= sizeof(struct sctp_strseq);
/*-
* Go through and find the TSN that will be the one
* we report.
*/
at = TAILQ_FIRST(&asoc->sent_queue);
if (at != NULL) {
for (i = 0; i < cnt_of_skipped; i++) {
tp1 = TAILQ_NEXT(at, sctp_next);
if (tp1 == NULL) {
break;
}
at = tp1;
}
}
if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) {
sctp_misc_ints(SCTP_FWD_TSN_CHECK,
0xff, cnt_of_skipped, at->rec.data.TSN_seq,
asoc->advanced_peer_ack_point);
}
last = at;
/*-
* last now points to last one I can report, update
* peer ack point
*/
if (last)
advance_peer_ack_point = last->rec.data.TSN_seq;
space_needed = sizeof(struct sctp_forward_tsn_chunk) +
cnt_of_skipped * sizeof(struct sctp_strseq);
}
chk->send_size = space_needed;
/* Setup the chunk */
fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *);
fwdtsn->ch.chunk_length = htons(chk->send_size);
fwdtsn->ch.chunk_flags = 0;
fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN;
fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point);
SCTP_BUF_LEN(chk->data) = chk->send_size;
fwdtsn++;
/*-
* Move pointer to after the fwdtsn and transfer to the
* strseq pointer.
*/
strseq = (struct sctp_strseq *)fwdtsn;
/*-
* Now populate the strseq list. This is done blindly
* without pulling out duplicate stream info. This is
* inefficent but won't harm the process since the peer will
* look at these in sequence and will thus release anything.
* It could mean we exceed the PMTU and chop off some that
* we could have included.. but this is unlikely (aka 1432/4
* would mean 300+ stream seq's would have to be reported in
* one FWD-TSN. With a bit of work we can later FIX this to
* optimize and pull out duplcates.. but it does add more
* overhead. So for now... not!
*/
at = TAILQ_FIRST(&asoc->sent_queue);
for (i = 0; i < cnt_of_skipped; i++) {
tp1 = TAILQ_NEXT(at, sctp_next);
if (tp1 == NULL)
break;
if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) {
/* We don't report these */
i--;
at = tp1;
continue;
}
if (at->rec.data.TSN_seq == advance_peer_ack_point) {
at->rec.data.fwd_tsn_cnt = 0;
}
strseq->stream = ntohs(at->rec.data.stream_number);
strseq->sequence = ntohs(at->rec.data.stream_seq);
strseq++;
at = tp1;
}
}
return;
}
void
sctp_send_sack(struct sctp_tcb *stcb, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
/*-
* Queue up a SACK or NR-SACK in the control queue.
* We must first check to see if a SACK or NR-SACK is
* somehow on the control queue.
* If so, we will take and and remove the old one.
*/
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk, *a_chk;
struct sctp_sack_chunk *sack;
struct sctp_nr_sack_chunk *nr_sack;
struct sctp_gap_ack_block *gap_descriptor;
struct sack_track *selector;
int mergeable = 0;
int offset;
caddr_t limit;
uint32_t *dup;
int limit_reached = 0;
unsigned int i, siz, j;
unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space;
int num_dups = 0;
int space_req;
uint32_t highest_tsn;
uint8_t flags;
uint8_t type;
uint8_t tsn_map;
if (stcb->asoc.nrsack_supported == 1) {
type = SCTP_NR_SELECTIVE_ACK;
} else {
type = SCTP_SELECTIVE_ACK;
}
a_chk = NULL;
asoc = &stcb->asoc;
SCTP_TCB_LOCK_ASSERT(stcb);
if (asoc->last_data_chunk_from == NULL) {
/* Hmm we never received anything */
return;
}
sctp_slide_mapping_arrays(stcb);
sctp_set_rwnd(stcb, asoc);
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if (chk->rec.chunk_id.id == type) {
/* Hmm, found a sack already on queue, remove it */
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt--;
a_chk = chk;
if (a_chk->data) {
sctp_m_freem(a_chk->data);
a_chk->data = NULL;
}
if (a_chk->whoTo) {
sctp_free_remote_addr(a_chk->whoTo);
a_chk->whoTo = NULL;
}
break;
}
}
if (a_chk == NULL) {
sctp_alloc_a_chunk(stcb, a_chk);
if (a_chk == NULL) {
/* No memory so we drop the idea, and set a timer */
if (stcb->asoc.delayed_ack) {
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
stcb->sctp_ep, stcb, NULL,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3);
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
stcb->sctp_ep, stcb, NULL);
} else {
stcb->asoc.send_sack = 1;
}
return;
}
a_chk->copy_by_ref = 0;
a_chk->rec.chunk_id.id = type;
a_chk->rec.chunk_id.can_take_data = 1;
}
/* Clear our pkt counts */
asoc->data_pkts_seen = 0;
a_chk->flags = 0;
a_chk->asoc = asoc;
a_chk->snd_count = 0;
a_chk->send_size = 0; /* fill in later */
a_chk->sent = SCTP_DATAGRAM_UNSENT;
a_chk->whoTo = NULL;
if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) {
/*-
* Ok, the destination for the SACK is unreachable, lets see if
* we can select an alternate to asoc->last_data_chunk_from
*/
a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0);
if (a_chk->whoTo == NULL) {
/* Nope, no alternate */
a_chk->whoTo = asoc->last_data_chunk_from;
}
} else {
a_chk->whoTo = asoc->last_data_chunk_from;
}
if (a_chk->whoTo) {
atomic_add_int(&a_chk->whoTo->ref_count, 1);
}
if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) {
highest_tsn = asoc->highest_tsn_inside_map;
} else {
highest_tsn = asoc->highest_tsn_inside_nr_map;
}
if (highest_tsn == asoc->cumulative_tsn) {
/* no gaps */
if (type == SCTP_SELECTIVE_ACK) {
space_req = sizeof(struct sctp_sack_chunk);
} else {
space_req = sizeof(struct sctp_nr_sack_chunk);
}
} else {
/* gaps get a cluster */
space_req = MCLBYTES;
}
/* Ok now lets formulate a MBUF with our sack */
a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA);
if ((a_chk->data == NULL) ||
(a_chk->whoTo == NULL)) {
/* rats, no mbuf memory */
if (a_chk->data) {
/* was a problem with the destination */
sctp_m_freem(a_chk->data);
a_chk->data = NULL;
}
sctp_free_a_chunk(stcb, a_chk, so_locked);
/* sa_ignore NO_NULL_CHK */
if (stcb->asoc.delayed_ack) {
sctp_timer_stop(SCTP_TIMER_TYPE_RECV,
stcb->sctp_ep, stcb, NULL,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4);
sctp_timer_start(SCTP_TIMER_TYPE_RECV,
stcb->sctp_ep, stcb, NULL);
} else {
stcb->asoc.send_sack = 1;
}
return;
}
/* ok, lets go through and fill it in */
SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD);
space = M_TRAILINGSPACE(a_chk->data);
if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) {
space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD);
}
limit = mtod(a_chk->data, caddr_t);
limit += space;
flags = 0;
if ((asoc->sctp_cmt_on_off > 0) &&
SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) {
/*-
* CMT DAC algorithm: If 2 (i.e., 0x10) packets have been
* received, then set high bit to 1, else 0. Reset
* pkts_rcvd.
*/
flags |= (asoc->cmt_dac_pkts_rcvd << 6);
asoc->cmt_dac_pkts_rcvd = 0;
}
#ifdef SCTP_ASOCLOG_OF_TSNS
stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn;
stcb->asoc.cumack_log_atsnt++;
if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) {
stcb->asoc.cumack_log_atsnt = 0;
}
#endif
/* reset the readers interpretation */
stcb->freed_by_sorcv_sincelast = 0;
if (type == SCTP_SELECTIVE_ACK) {
sack = mtod(a_chk->data, struct sctp_sack_chunk *);
nr_sack = NULL;
gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk));
if (highest_tsn > asoc->mapping_array_base_tsn) {
siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
} else {
siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8;
}
} else {
sack = NULL;
nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *);
gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk));
if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) {
siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
} else {
siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8;
}
}
if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
offset = 1;
} else {
offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
}
if (((type == SCTP_SELECTIVE_ACK) &&
SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) ||
((type == SCTP_NR_SELECTIVE_ACK) &&
SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) {
/* we have a gap .. maybe */
for (i = 0; i < siz; i++) {
tsn_map = asoc->mapping_array[i];
if (type == SCTP_SELECTIVE_ACK) {
tsn_map |= asoc->nr_mapping_array[i];
}
if (i == 0) {
/*
* Clear all bits corresponding to TSNs
* smaller or equal to the cumulative TSN.
*/
tsn_map &= (~0 << (1 - offset));
}
selector = &sack_array[tsn_map];
if (mergeable && selector->right_edge) {
/*
* Backup, left and right edges were ok to
* merge.
*/
num_gap_blocks--;
gap_descriptor--;
}
if (selector->num_entries == 0)
mergeable = 0;
else {
for (j = 0; j < selector->num_entries; j++) {
if (mergeable && selector->right_edge) {
/*
* do a merge by NOT setting
* the left side
*/
mergeable = 0;
} else {
/*
* no merge, set the left
* side
*/
mergeable = 0;
gap_descriptor->start = htons((selector->gaps[j].start + offset));
}
gap_descriptor->end = htons((selector->gaps[j].end + offset));
num_gap_blocks++;
gap_descriptor++;
if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
/* no more room */
limit_reached = 1;
break;
}
}
if (selector->left_edge) {
mergeable = 1;
}
}
if (limit_reached) {
/* Reached the limit stop */
break;
}
offset += 8;
}
}
if ((type == SCTP_NR_SELECTIVE_ACK) &&
(limit_reached == 0)) {
mergeable = 0;
if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) {
siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8;
} else {
siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8;
}
if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) {
offset = 1;
} else {
offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn;
}
if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) {
/* we have a gap .. maybe */
for (i = 0; i < siz; i++) {
tsn_map = asoc->nr_mapping_array[i];
if (i == 0) {
/*
* Clear all bits corresponding to
* TSNs smaller or equal to the
* cumulative TSN.
*/
tsn_map &= (~0 << (1 - offset));
}
selector = &sack_array[tsn_map];
if (mergeable && selector->right_edge) {
/*
* Backup, left and right edges were
* ok to merge.
*/
num_nr_gap_blocks--;
gap_descriptor--;
}
if (selector->num_entries == 0)
mergeable = 0;
else {
for (j = 0; j < selector->num_entries; j++) {
if (mergeable && selector->right_edge) {
/*
* do a merge by NOT
* setting the left
* side
*/
mergeable = 0;
} else {
/*
* no merge, set the
* left side
*/
mergeable = 0;
gap_descriptor->start = htons((selector->gaps[j].start + offset));
}
gap_descriptor->end = htons((selector->gaps[j].end + offset));
num_nr_gap_blocks++;
gap_descriptor++;
if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) {
/* no more room */
limit_reached = 1;
break;
}
}
if (selector->left_edge) {
mergeable = 1;
}
}
if (limit_reached) {
/* Reached the limit stop */
break;
}
offset += 8;
}
}
}
/* now we must add any dups we are going to report. */
if ((limit_reached == 0) && (asoc->numduptsns)) {
dup = (uint32_t *) gap_descriptor;
for (i = 0; i < asoc->numduptsns; i++) {
*dup = htonl(asoc->dup_tsns[i]);
dup++;
num_dups++;
if (((caddr_t)dup + sizeof(uint32_t)) > limit) {
/* no more room */
break;
}
}
asoc->numduptsns = 0;
}
/*
* now that the chunk is prepared queue it to the control chunk
* queue.
*/
if (type == SCTP_SELECTIVE_ACK) {
a_chk->send_size = sizeof(struct sctp_sack_chunk) +
(num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
num_dups * sizeof(int32_t);
SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
sack->sack.a_rwnd = htonl(asoc->my_rwnd);
sack->sack.num_gap_ack_blks = htons(num_gap_blocks);
sack->sack.num_dup_tsns = htons(num_dups);
sack->ch.chunk_type = type;
sack->ch.chunk_flags = flags;
sack->ch.chunk_length = htons(a_chk->send_size);
} else {
a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) +
(num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) +
num_dups * sizeof(int32_t);
SCTP_BUF_LEN(a_chk->data) = a_chk->send_size;
nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn);
nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd);
nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks);
nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks);
nr_sack->nr_sack.num_dup_tsns = htons(num_dups);
nr_sack->nr_sack.reserved = 0;
nr_sack->ch.chunk_type = type;
nr_sack->ch.chunk_flags = flags;
nr_sack->ch.chunk_length = htons(a_chk->send_size);
}
TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next);
asoc->my_last_reported_rwnd = asoc->my_rwnd;
asoc->ctrl_queue_cnt++;
asoc->send_sack = 0;
SCTP_STAT_INCR(sctps_sendsacks);
return;
}
void
sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct mbuf *m_abort, *m, *m_last;
struct mbuf *m_out, *m_end = NULL;
struct sctp_abort_chunk *abort;
struct sctp_auth_chunk *auth = NULL;
struct sctp_nets *net;
uint32_t vtag;
uint32_t auth_offset = 0;
uint16_t cause_len, chunk_len, padding_len;
SCTP_TCB_LOCK_ASSERT(stcb);
/*-
* Add an AUTH chunk, if chunk requires it and save the offset into
* the chain for AUTH
*/
if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION,
stcb->asoc.peer_auth_chunks)) {
m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset,
stcb, SCTP_ABORT_ASSOCIATION);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
} else {
m_out = NULL;
}
m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER);
if (m_abort == NULL) {
if (m_out) {
sctp_m_freem(m_out);
}
if (operr) {
sctp_m_freem(operr);
}
return;
}
/* link in any error */
SCTP_BUF_NEXT(m_abort) = operr;
cause_len = 0;
m_last = NULL;
for (m = operr; m; m = SCTP_BUF_NEXT(m)) {
cause_len += (uint16_t) SCTP_BUF_LEN(m);
if (SCTP_BUF_NEXT(m) == NULL) {
m_last = m;
}
}
SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk);
chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len;
padding_len = SCTP_SIZE32(chunk_len) - chunk_len;
if (m_out == NULL) {
/* NO Auth chunk prepended, so reserve space in front */
SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD);
m_out = m_abort;
} else {
/* Put AUTH chunk at the front of the chain */
SCTP_BUF_NEXT(m_end) = m_abort;
}
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
/* Fill in the ABORT chunk header. */
abort = mtod(m_abort, struct sctp_abort_chunk *);
abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION;
if (stcb->asoc.peer_vtag == 0) {
/* This happens iff the assoc is in COOKIE-WAIT state. */
vtag = stcb->asoc.my_vtag;
abort->ch.chunk_flags = SCTP_HAD_NO_TCB;
} else {
vtag = stcb->asoc.peer_vtag;
abort->ch.chunk_flags = 0;
}
abort->ch.chunk_length = htons(chunk_len);
/* Add padding, if necessary. */
if (padding_len > 0) {
if ((m_last == NULL) ||
(sctp_add_pad_tombuf(m_last, padding_len) == NULL)) {
sctp_m_freem(m_out);
return;
}
}
(void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0,
stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag),
stcb->asoc.primary_destination->port, NULL,
0, 0,
so_locked);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
}
void
sctp_send_shutdown_complete(struct sctp_tcb *stcb,
struct sctp_nets *net,
int reflect_vtag)
{
/* formulate and SEND a SHUTDOWN-COMPLETE */
struct mbuf *m_shutdown_comp;
struct sctp_shutdown_complete_chunk *shutdown_complete;
uint32_t vtag;
uint8_t flags;
m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER);
if (m_shutdown_comp == NULL) {
/* no mbuf's */
return;
}
if (reflect_vtag) {
flags = SCTP_HAD_NO_TCB;
vtag = stcb->asoc.my_vtag;
} else {
flags = 0;
vtag = stcb->asoc.peer_vtag;
}
shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *);
shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE;
shutdown_complete->ch.chunk_flags = flags;
shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk));
SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk);
(void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net,
(struct sockaddr *)&net->ro._l_addr,
m_shutdown_comp, 0, NULL, 0, 1, 0, 0,
stcb->sctp_ep->sctp_lport, stcb->rport,
htonl(vtag),
net->port, NULL,
0, 0,
SCTP_SO_NOT_LOCKED);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
return;
}
static void
sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, uint32_t vtag,
uint8_t type, struct mbuf *cause,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
struct mbuf *o_pak;
struct mbuf *mout;
struct sctphdr *shout;
struct sctp_chunkhdr *ch;
#if defined(INET) || defined(INET6)
struct udphdr *udp;
int ret;
#endif
int len, cause_len, padding_len;
#ifdef INET
struct sockaddr_in *src_sin, *dst_sin;
struct ip *ip;
#endif
#ifdef INET6
struct sockaddr_in6 *src_sin6, *dst_sin6;
struct ip6_hdr *ip6;
#endif
/* Compute the length of the cause and add final padding. */
cause_len = 0;
if (cause != NULL) {
struct mbuf *m_at, *m_last = NULL;
for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
if (SCTP_BUF_NEXT(m_at) == NULL)
m_last = m_at;
cause_len += SCTP_BUF_LEN(m_at);
}
padding_len = cause_len % 4;
if (padding_len != 0) {
padding_len = 4 - padding_len;
}
if (padding_len != 0) {
if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) {
sctp_m_freem(cause);
return;
}
}
} else {
padding_len = 0;
}
/* Get an mbuf for the header. */
len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
len += sizeof(struct ip);
break;
#endif
#ifdef INET6
case AF_INET6:
len += sizeof(struct ip6_hdr);
break;
#endif
default:
break;
}
#if defined(INET) || defined(INET6)
if (port) {
len += sizeof(struct udphdr);
}
#endif
mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA);
if (mout == NULL) {
if (cause) {
sctp_m_freem(cause);
}
return;
}
SCTP_BUF_RESV_UF(mout, max_linkhdr);
SCTP_BUF_LEN(mout) = len;
SCTP_BUF_NEXT(mout) = cause;
M_SETFIB(mout, fibnum);
mout->m_pkthdr.flowid = mflowid;
M_HASHTYPE_SET(mout, mflowtype);
#ifdef INET
ip = NULL;
#endif
#ifdef INET6
ip6 = NULL;
#endif
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
src_sin = (struct sockaddr_in *)src;
dst_sin = (struct sockaddr_in *)dst;
ip = mtod(mout, struct ip *);
ip->ip_v = IPVERSION;
ip->ip_hl = (sizeof(struct ip) >> 2);
ip->ip_tos = 0;
ip->ip_id = ip_newid();
ip->ip_off = 0;
ip->ip_ttl = MODULE_GLOBAL(ip_defttl);
if (port) {
ip->ip_p = IPPROTO_UDP;
} else {
ip->ip_p = IPPROTO_SCTP;
}
ip->ip_src.s_addr = dst_sin->sin_addr.s_addr;
ip->ip_dst.s_addr = src_sin->sin_addr.s_addr;
ip->ip_sum = 0;
len = sizeof(struct ip);
shout = (struct sctphdr *)((caddr_t)ip + len);
break;
#endif
#ifdef INET6
case AF_INET6:
src_sin6 = (struct sockaddr_in6 *)src;
dst_sin6 = (struct sockaddr_in6 *)dst;
ip6 = mtod(mout, struct ip6_hdr *);
ip6->ip6_flow = htonl(0x60000000);
if (V_ip6_auto_flowlabel) {
ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK);
}
ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim);
if (port) {
ip6->ip6_nxt = IPPROTO_UDP;
} else {
ip6->ip6_nxt = IPPROTO_SCTP;
}
ip6->ip6_src = dst_sin6->sin6_addr;
ip6->ip6_dst = src_sin6->sin6_addr;
len = sizeof(struct ip6_hdr);
shout = (struct sctphdr *)((caddr_t)ip6 + len);
break;
#endif
default:
len = 0;
shout = mtod(mout, struct sctphdr *);
break;
}
#if defined(INET) || defined(INET6)
if (port) {
if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) {
sctp_m_freem(mout);
return;
}
udp = (struct udphdr *)shout;
udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port));
udp->uh_dport = port;
udp->uh_sum = 0;
udp->uh_ulen = htons(sizeof(struct udphdr) +
sizeof(struct sctphdr) +
sizeof(struct sctp_chunkhdr) +
cause_len + padding_len);
len += sizeof(struct udphdr);
shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr));
} else {
udp = NULL;
}
#endif
shout->src_port = sh->dest_port;
shout->dest_port = sh->src_port;
shout->checksum = 0;
if (vtag) {
shout->v_tag = htonl(vtag);
} else {
shout->v_tag = sh->v_tag;
}
len += sizeof(struct sctphdr);
ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr));
ch->chunk_type = type;
if (vtag) {
ch->chunk_flags = 0;
} else {
ch->chunk_flags = SCTP_HAD_NO_TCB;
}
ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len);
len += sizeof(struct sctp_chunkhdr);
len += cause_len + padding_len;
if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) {
sctp_m_freem(mout);
return;
}
SCTP_ATTACH_CHAIN(o_pak, mout, len);
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
if (port) {
if (V_udp_cksum) {
udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP));
} else {
udp->uh_sum = 0;
}
}
ip->ip_len = htons(len);
if (port) {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
#else
shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
#endif
if (V_udp_cksum) {
SCTP_ENABLE_UDP_CSUM(o_pak);
}
} else {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
#else
mout->m_pkthdr.csum_flags = CSUM_SCTP;
mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
#endif
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
sctp_packet_log(o_pak);
}
#endif
SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id);
break;
#endif
#ifdef INET6
case AF_INET6:
ip6->ip6_plen = len - sizeof(struct ip6_hdr);
if (port) {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
#else
shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr));
SCTP_STAT_INCR(sctps_sendswcrc);
#endif
if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) {
udp->uh_sum = 0xffff;
}
} else {
#if defined(SCTP_WITH_NO_CSUM)
SCTP_STAT_INCR(sctps_sendnocrc);
#else
mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6;
mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum);
SCTP_STAT_INCR(sctps_sendhwcrc);
#endif
}
#ifdef SCTP_PACKET_LOGGING
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
sctp_packet_log(o_pak);
}
#endif
SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id);
break;
#endif
default:
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n",
dst->sa_family);
sctp_m_freem(mout);
SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT);
return;
}
SCTP_STAT_INCR(sctps_sendpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outpackets);
SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks);
return;
}
void
sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL,
mflowtype, mflowid, fibnum,
vrf_id, port);
}
void
sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct sctp_tmit_chunk *chk;
struct sctp_heartbeat_chunk *hb;
struct timeval now;
SCTP_TCB_LOCK_ASSERT(stcb);
if (net == NULL) {
return;
}
(void)SCTP_GETTIME_TIMEVAL(&now);
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
break;
#endif
#ifdef INET6
case AF_INET6:
break;
#endif
default:
return;
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n");
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->send_size = sizeof(struct sctp_heartbeat_chunk);
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, so_locked);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
SCTP_BUF_LEN(chk->data) = chk->send_size;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
/* Now we have a mbuf that we can fill in with the details */
hb = mtod(chk->data, struct sctp_heartbeat_chunk *);
memset(hb, 0, sizeof(struct sctp_heartbeat_chunk));
/* fill out chunk header */
hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST;
hb->ch.chunk_flags = 0;
hb->ch.chunk_length = htons(chk->send_size);
/* Fill out hb parameter */
hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO);
hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param));
hb->heartbeat.hb_info.time_value_1 = now.tv_sec;
hb->heartbeat.hb_info.time_value_2 = now.tv_usec;
/* Did our user request this one, put it in */
hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family;
hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len;
if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
/*
* we only take from the entropy pool if the address is not
* confirmed.
*/
net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep);
} else {
net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0;
net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0;
}
switch (net->ro._l_addr.sa.sa_family) {
#ifdef INET
case AF_INET:
memcpy(hb->heartbeat.hb_info.address,
&net->ro._l_addr.sin.sin_addr,
sizeof(net->ro._l_addr.sin.sin_addr));
break;
#endif
#ifdef INET6
case AF_INET6:
memcpy(hb->heartbeat.hb_info.address,
&net->ro._l_addr.sin6.sin6_addr,
sizeof(net->ro._l_addr.sin6.sin6_addr));
break;
#endif
default:
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
sctp_free_a_chunk(stcb, chk, so_locked);
return;
break;
}
net->hb_responded = 0;
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
stcb->asoc.ctrl_queue_cnt++;
SCTP_STAT_INCR(sctps_sendheartbeat);
return;
}
void
sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net,
uint32_t high_tsn)
{
struct sctp_association *asoc;
struct sctp_ecne_chunk *ecne;
struct sctp_tmit_chunk *chk;
if (net == NULL) {
return;
}
asoc = &stcb->asoc;
SCTP_TCB_LOCK_ASSERT(stcb);
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) {
/* found a previous ECN_ECHO update it if needed */
uint32_t cnt, ctsn;
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
ctsn = ntohl(ecne->tsn);
if (SCTP_TSN_GT(high_tsn, ctsn)) {
ecne->tsn = htonl(high_tsn);
SCTP_STAT_INCR(sctps_queue_upd_ecne);
}
cnt = ntohl(ecne->num_pkts_since_cwr);
cnt++;
ecne->num_pkts_since_cwr = htonl(cnt);
return;
}
}
/* nope could not find one to update so we must build one */
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return;
}
SCTP_STAT_INCR(sctps_queue_upd_ecne);
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_ECN_ECHO;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->send_size = sizeof(struct sctp_ecne_chunk);
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
SCTP_BUF_LEN(chk->data) = chk->send_size;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
stcb->asoc.ecn_echo_cnt_onq++;
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
ecne->ch.chunk_type = SCTP_ECN_ECHO;
ecne->ch.chunk_flags = 0;
ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk));
ecne->tsn = htonl(high_tsn);
ecne->num_pkts_since_cwr = htonl(1);
TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt++;
}
void
sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net,
struct mbuf *m, int len, int iphlen, int bad_crc)
{
struct sctp_association *asoc;
struct sctp_pktdrop_chunk *drp;
struct sctp_tmit_chunk *chk;
uint8_t *datap;
int was_trunc = 0;
int fullsz = 0;
long spc;
int offset;
struct sctp_chunkhdr *ch, chunk_buf;
unsigned int chk_length;
if (!stcb) {
return;
}
asoc = &stcb->asoc;
SCTP_TCB_LOCK_ASSERT(stcb);
if (asoc->pktdrop_supported == 0) {
/*-
* peer must declare support before I send one.
*/
return;
}
if (stcb->sctp_socket == NULL) {
return;
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_PACKET_DROPPED;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
len -= iphlen;
chk->send_size = len;
/* Validate that we do not have an ABORT in here. */
offset = iphlen + sizeof(struct sctphdr);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *) & chunk_buf);
while (ch != NULL) {
chk_length = ntohs(ch->chunk_length);
if (chk_length < sizeof(*ch)) {
/* break to abort land */
break;
}
switch (ch->chunk_type) {
case SCTP_PACKET_DROPPED:
case SCTP_ABORT_ASSOCIATION:
case SCTP_INITIATION_ACK:
/**
* We don't respond with an PKT-DROP to an ABORT
* or PKT-DROP. We also do not respond to an
* INIT-ACK, because we can't know if the initiation
* tag is correct or not.
*/
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
default:
break;
}
offset += SCTP_SIZE32(chk_length);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *) & chunk_buf);
}
if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) >
min(stcb->asoc.smallest_mtu, MCLBYTES)) {
/*
* only send 1 mtu worth, trim off the excess on the end.
*/
fullsz = len;
len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD;
was_trunc = 1;
}
chk->asoc = &stcb->asoc;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
jump_out:
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
drp = mtod(chk->data, struct sctp_pktdrop_chunk *);
if (drp == NULL) {
sctp_m_freem(chk->data);
chk->data = NULL;
goto jump_out;
}
chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) +
sizeof(struct sctphdr) + SCTP_MED_OVERHEAD));
chk->book_size_scale = 0;
if (was_trunc) {
drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED;
drp->trunc_len = htons(fullsz);
/*
* Len is already adjusted to size minus overhead above take
* out the pkt_drop chunk itself from it.
*/
chk->send_size = len - sizeof(struct sctp_pktdrop_chunk);
len = chk->send_size;
} else {
/* no truncation needed */
drp->ch.chunk_flags = 0;
drp->trunc_len = htons(0);
}
if (bad_crc) {
drp->ch.chunk_flags |= SCTP_BADCRC;
}
chk->send_size += sizeof(struct sctp_pktdrop_chunk);
SCTP_BUF_LEN(chk->data) = chk->send_size;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (net) {
/* we should hit here */
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
} else {
chk->whoTo = NULL;
}
drp->ch.chunk_type = SCTP_PACKET_DROPPED;
drp->ch.chunk_length = htons(chk->send_size);
spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket);
if (spc < 0) {
spc = 0;
}
drp->bottle_bw = htonl(spc);
if (asoc->my_rwnd) {
drp->current_onq = htonl(asoc->size_on_reasm_queue +
asoc->size_on_all_streams +
asoc->my_rwnd_control_len +
stcb->sctp_socket->so_rcv.sb_cc);
} else {
/*-
* If my rwnd is 0, possibly from mbuf depletion as well as
* space used, tell the peer there is NO space aka onq == bw
*/
drp->current_onq = htonl(spc);
}
drp->reserved = 0;
datap = drp->data;
m_copydata(m, iphlen, len, (caddr_t)datap);
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt++;
}
void
sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override)
{
struct sctp_association *asoc;
struct sctp_cwr_chunk *cwr;
struct sctp_tmit_chunk *chk;
SCTP_TCB_LOCK_ASSERT(stcb);
if (net == NULL) {
return;
}
asoc = &stcb->asoc;
TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) {
if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) {
/*
* found a previous CWR queued to same destination
* update it if needed
*/
uint32_t ctsn;
cwr = mtod(chk->data, struct sctp_cwr_chunk *);
ctsn = ntohl(cwr->tsn);
if (SCTP_TSN_GT(high_tsn, ctsn)) {
cwr->tsn = htonl(high_tsn);
}
if (override & SCTP_CWR_REDUCE_OVERRIDE) {
/* Make sure override is carried */
cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE;
}
return;
}
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_ECN_CWR;
chk->rec.chunk_id.can_take_data = 1;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->send_size = sizeof(struct sctp_cwr_chunk);
chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
SCTP_BUF_LEN(chk->data) = chk->send_size;
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
chk->whoTo = net;
atomic_add_int(&chk->whoTo->ref_count, 1);
cwr = mtod(chk->data, struct sctp_cwr_chunk *);
cwr->ch.chunk_type = SCTP_ECN_CWR;
cwr->ch.chunk_flags = override;
cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk));
cwr->tsn = htonl(high_tsn);
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next);
asoc->ctrl_queue_cnt++;
}
static int
sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
uint32_t seq, uint32_t resp_seq, uint32_t last_sent)
{
uint16_t len, old_len, i;
struct sctp_stream_reset_out_request *req_out;
struct sctp_chunkhdr *ch;
int at;
int number_entries = 0;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
/* get to new offset for the param. */
req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len);
/* now how long will this param be? */
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
(stcb->asoc.strmout[i].chunks_on_queues == 0) &&
TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
number_entries++;
}
}
if (number_entries == 0) {
return (0);
}
if (number_entries == stcb->asoc.streamoutcnt) {
number_entries = 0;
}
if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) {
number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET;
}
len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries));
req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST);
req_out->ph.param_length = htons(len);
req_out->request_seq = htonl(seq);
req_out->response_seq = htonl(resp_seq);
req_out->send_reset_at_tsn = htonl(last_sent);
at = 0;
if (number_entries) {
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) &&
(stcb->asoc.strmout[i].chunks_on_queues == 0) &&
TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) {
req_out->list_of_streams[at] = htons(i);
at++;
stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
if (at >= number_entries) {
break;
}
}
}
} else {
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT;
}
}
if (SCTP_SIZE32(len) > len) {
/*-
* Need to worry about the pad we may end up adding to the
* end. This is easy since the struct is either aligned to 4
* bytes or 2 bytes off.
*/
req_out->list_of_streams[number_entries] = 0;
}
/* now fix the chunk length */
ch->chunk_length = htons(len + old_len);
chk->book_size = len + old_len;
chk->book_size_scale = 0;
chk->send_size = SCTP_SIZE32(chk->book_size);
SCTP_BUF_LEN(chk->data) = chk->send_size;
return (1);
}
static void
sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk,
int number_entries, uint16_t * list,
uint32_t seq)
{
uint16_t len, old_len, i;
struct sctp_stream_reset_in_request *req_in;
struct sctp_chunkhdr *ch;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
/* get to new offset for the param. */
req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len);
/* now how long will this param be? */
len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries));
req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST);
req_in->ph.param_length = htons(len);
req_in->request_seq = htonl(seq);
if (number_entries) {
for (i = 0; i < number_entries; i++) {
req_in->list_of_streams[i] = htons(list[i]);
}
}
if (SCTP_SIZE32(len) > len) {
/*-
* Need to worry about the pad we may end up adding to the
* end. This is easy since the struct is either aligned to 4
* bytes or 2 bytes off.
*/
req_in->list_of_streams[number_entries] = 0;
}
/* now fix the chunk length */
ch->chunk_length = htons(len + old_len);
chk->book_size = len + old_len;
chk->book_size_scale = 0;
chk->send_size = SCTP_SIZE32(chk->book_size);
SCTP_BUF_LEN(chk->data) = chk->send_size;
return;
}
static void
sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk,
uint32_t seq)
{
uint16_t len, old_len;
struct sctp_stream_reset_tsn_request *req_tsn;
struct sctp_chunkhdr *ch;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
/* get to new offset for the param. */
req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len);
/* now how long will this param be? */
len = sizeof(struct sctp_stream_reset_tsn_request);
req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST);
req_tsn->ph.param_length = htons(len);
req_tsn->request_seq = htonl(seq);
/* now fix the chunk length */
ch->chunk_length = htons(len + old_len);
chk->send_size = len + old_len;
chk->book_size = SCTP_SIZE32(chk->send_size);
chk->book_size_scale = 0;
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
return;
}
void
sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk,
uint32_t resp_seq, uint32_t result)
{
uint16_t len, old_len;
struct sctp_stream_reset_response *resp;
struct sctp_chunkhdr *ch;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
/* get to new offset for the param. */
resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len);
/* now how long will this param be? */
len = sizeof(struct sctp_stream_reset_response);
resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
resp->ph.param_length = htons(len);
resp->response_seq = htonl(resp_seq);
resp->result = ntohl(result);
/* now fix the chunk length */
ch->chunk_length = htons(len + old_len);
chk->book_size = len + old_len;
chk->book_size_scale = 0;
chk->send_size = SCTP_SIZE32(chk->book_size);
SCTP_BUF_LEN(chk->data) = chk->send_size;
return;
}
void
sctp_send_deferred_reset_response(struct sctp_tcb *stcb,
struct sctp_stream_reset_list *ent,
int response)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk;
struct sctp_chunkhdr *ch;
asoc = &stcb->asoc;
/*
* Reset our last reset action to the new one IP -> response
* (PERFORMED probably). This assures that if we fail to send, a
* retran from the peer will get the new response.
*/
asoc->last_reset_action[0] = response;
if (asoc->stream_reset_outstanding) {
return;
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return;
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->book_size = sizeof(struct sctp_chunkhdr);
chk->send_size = SCTP_SIZE32(chk->book_size);
chk->book_size_scale = 0;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return;
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
sctp_add_stream_reset_result(chk, ent->seq, response);
/* setup chunk parameters */
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (stcb->asoc.alternate) {
chk->whoTo = stcb->asoc.alternate;
} else {
chk->whoTo = stcb->asoc.primary_destination;
}
ch = mtod(chk->data, struct sctp_chunkhdr *);
ch->chunk_type = SCTP_STREAM_RESET;
ch->chunk_flags = 0;
ch->chunk_length = htons(chk->book_size);
atomic_add_int(&chk->whoTo->ref_count, 1);
SCTP_BUF_LEN(chk->data) = chk->send_size;
/* insert the chunk for sending */
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
chk,
sctp_next);
asoc->ctrl_queue_cnt++;
}
void
sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk,
uint32_t resp_seq, uint32_t result,
uint32_t send_una, uint32_t recv_next)
{
uint16_t len, old_len;
struct sctp_stream_reset_response_tsn *resp;
struct sctp_chunkhdr *ch;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
/* get to new offset for the param. */
resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len);
/* now how long will this param be? */
len = sizeof(struct sctp_stream_reset_response_tsn);
resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE);
resp->ph.param_length = htons(len);
resp->response_seq = htonl(resp_seq);
resp->result = htonl(result);
resp->senders_next_tsn = htonl(send_una);
resp->receivers_next_tsn = htonl(recv_next);
/* now fix the chunk length */
ch->chunk_length = htons(len + old_len);
chk->book_size = len + old_len;
chk->send_size = SCTP_SIZE32(chk->book_size);
chk->book_size_scale = 0;
SCTP_BUF_LEN(chk->data) = chk->send_size;
return;
}
static void
sctp_add_an_out_stream(struct sctp_tmit_chunk *chk,
uint32_t seq,
uint16_t adding)
{
uint16_t len, old_len;
struct sctp_chunkhdr *ch;
struct sctp_stream_reset_add_strm *addstr;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
/* get to new offset for the param. */
addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
/* now how long will this param be? */
len = sizeof(struct sctp_stream_reset_add_strm);
/* Fill it out. */
addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS);
addstr->ph.param_length = htons(len);
addstr->request_seq = htonl(seq);
addstr->number_of_streams = htons(adding);
addstr->reserved = 0;
/* now fix the chunk length */
ch->chunk_length = htons(len + old_len);
chk->send_size = len + old_len;
chk->book_size = SCTP_SIZE32(chk->send_size);
chk->book_size_scale = 0;
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
return;
}
static void
sctp_add_an_in_stream(struct sctp_tmit_chunk *chk,
uint32_t seq,
uint16_t adding)
{
uint16_t len, old_len;
struct sctp_chunkhdr *ch;
struct sctp_stream_reset_add_strm *addstr;
ch = mtod(chk->data, struct sctp_chunkhdr *);
old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length));
/* get to new offset for the param. */
addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len);
/* now how long will this param be? */
len = sizeof(struct sctp_stream_reset_add_strm);
/* Fill it out. */
addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS);
addstr->ph.param_length = htons(len);
addstr->request_seq = htonl(seq);
addstr->number_of_streams = htons(adding);
addstr->reserved = 0;
/* now fix the chunk length */
ch->chunk_length = htons(len + old_len);
chk->send_size = len + old_len;
chk->book_size = SCTP_SIZE32(chk->send_size);
chk->book_size_scale = 0;
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
return;
}
int
sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk;
struct sctp_chunkhdr *ch;
uint32_t seq;
asoc = &stcb->asoc;
asoc->trigger_reset = 0;
if (asoc->stream_reset_outstanding) {
return (EALREADY);
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->book_size = sizeof(struct sctp_chunkhdr);
chk->send_size = SCTP_SIZE32(chk->book_size);
chk->book_size_scale = 0;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, so_locked);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
/* setup chunk parameters */
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (stcb->asoc.alternate) {
chk->whoTo = stcb->asoc.alternate;
} else {
chk->whoTo = stcb->asoc.primary_destination;
}
ch = mtod(chk->data, struct sctp_chunkhdr *);
ch->chunk_type = SCTP_STREAM_RESET;
ch->chunk_flags = 0;
ch->chunk_length = htons(chk->book_size);
atomic_add_int(&chk->whoTo->ref_count, 1);
SCTP_BUF_LEN(chk->data) = chk->send_size;
seq = stcb->asoc.str_reset_seq_out;
if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) {
seq++;
asoc->stream_reset_outstanding++;
} else {
m_freem(chk->data);
chk->data = NULL;
sctp_free_a_chunk(stcb, chk, so_locked);
return (ENOENT);
}
asoc->str_reset = chk;
/* insert the chunk for sending */
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
chk,
sctp_next);
asoc->ctrl_queue_cnt++;
if (stcb->asoc.send_sack) {
sctp_send_sack(stcb, so_locked);
}
sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
return (0);
}
int
sctp_send_str_reset_req(struct sctp_tcb *stcb,
uint16_t number_entries, uint16_t * list,
uint8_t send_in_req,
uint8_t send_tsn_req,
uint8_t add_stream,
uint16_t adding_o,
uint16_t adding_i, uint8_t peer_asked)
{
struct sctp_association *asoc;
struct sctp_tmit_chunk *chk;
struct sctp_chunkhdr *ch;
int can_send_out_req = 0;
uint32_t seq;
asoc = &stcb->asoc;
if (asoc->stream_reset_outstanding) {
/*-
* Already one pending, must get ACK back to clear the flag.
*/
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY);
return (EBUSY);
}
if ((send_in_req == 0) && (send_tsn_req == 0) &&
(add_stream == 0)) {
/* nothing to do */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
if (send_tsn_req && send_in_req) {
/* error, can't do that */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
} else if (send_in_req) {
can_send_out_req = 1;
}
if (number_entries > (MCLBYTES -
SCTP_MIN_OVERHEAD -
sizeof(struct sctp_chunkhdr) -
sizeof(struct sctp_stream_reset_out_request)) /
sizeof(uint16_t)) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
chk->copy_by_ref = 0;
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
chk->rec.chunk_id.can_take_data = 0;
chk->flags = 0;
chk->asoc = &stcb->asoc;
chk->book_size = sizeof(struct sctp_chunkhdr);
chk->send_size = SCTP_SIZE32(chk->book_size);
chk->book_size_scale = 0;
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
if (chk->data == NULL) {
sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
return (ENOMEM);
}
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
/* setup chunk parameters */
chk->sent = SCTP_DATAGRAM_UNSENT;
chk->snd_count = 0;
if (stcb->asoc.alternate) {
chk->whoTo = stcb->asoc.alternate;
} else {
chk->whoTo = stcb->asoc.primary_destination;
}
atomic_add_int(&chk->whoTo->ref_count, 1);
ch = mtod(chk->data, struct sctp_chunkhdr *);
ch->chunk_type = SCTP_STREAM_RESET;
ch->chunk_flags = 0;
ch->chunk_length = htons(chk->book_size);
SCTP_BUF_LEN(chk->data) = chk->send_size;
seq = stcb->asoc.str_reset_seq_out;
if (can_send_out_req) {
int ret;
ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1));
if (ret) {
seq++;
asoc->stream_reset_outstanding++;
}
}
if ((add_stream & 1) &&
((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) {
/* Need to allocate more */
struct sctp_stream_out *oldstream;
struct sctp_stream_queue_pending *sp, *nsp;
int i;
#if defined(SCTP_DETAILED_STR_STATS)
int j;
#endif
oldstream = stcb->asoc.strmout;
/* get some more */
SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *,
(stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out),
SCTP_M_STRMO);
if (stcb->asoc.strmout == NULL) {
uint8_t x;
stcb->asoc.strmout = oldstream;
/* Turn off the bit */
x = add_stream & 0xfe;
add_stream = x;
goto skip_stuff;
}
/*
* Ok now we proceed with copying the old out stuff and
* initializing the new stuff.
*/
SCTP_TCB_SEND_LOCK(stcb);
stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1);
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues;
stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send;
stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete;
stcb->asoc.strmout[i].stream_no = i;
stcb->asoc.strmout[i].state = oldstream[i].state;
stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]);
/* now anything on those queues? */
TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) {
TAILQ_REMOVE(&oldstream[i].outqueue, sp, next);
TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next);
}
/* Now move assoc pointers too */
if (stcb->asoc.last_out_stream == &oldstream[i]) {
stcb->asoc.last_out_stream = &stcb->asoc.strmout[i];
}
if (stcb->asoc.locked_on_sending == &oldstream[i]) {
stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i];
}
}
/* now the new streams */
stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1);
for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) {
TAILQ_INIT(&stcb->asoc.strmout[i].outqueue);
stcb->asoc.strmout[i].chunks_on_queues = 0;
#if defined(SCTP_DETAILED_STR_STATS)
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
stcb->asoc.strmout[i].abandoned_sent[j] = 0;
stcb->asoc.strmout[i].abandoned_unsent[j] = 0;
}
#else
stcb->asoc.strmout[i].abandoned_sent[0] = 0;
stcb->asoc.strmout[i].abandoned_unsent[0] = 0;
#endif
stcb->asoc.strmout[i].next_sequence_send = 0x0;
stcb->asoc.strmout[i].stream_no = i;
stcb->asoc.strmout[i].last_msg_incomplete = 0;
stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL);
stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED;
}
stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o;
SCTP_FREE(oldstream, SCTP_M_STRMO);
SCTP_TCB_SEND_UNLOCK(stcb);
}
skip_stuff:
if ((add_stream & 1) && (adding_o > 0)) {
asoc->strm_pending_add_size = adding_o;
asoc->peer_req_out = peer_asked;
sctp_add_an_out_stream(chk, seq, adding_o);
seq++;
asoc->stream_reset_outstanding++;
}
if ((add_stream & 2) && (adding_i > 0)) {
sctp_add_an_in_stream(chk, seq, adding_i);
seq++;
asoc->stream_reset_outstanding++;
}
if (send_in_req) {
sctp_add_stream_reset_in(chk, number_entries, list, seq);
seq++;
asoc->stream_reset_outstanding++;
}
if (send_tsn_req) {
sctp_add_stream_reset_tsn(chk, seq);
asoc->stream_reset_outstanding++;
}
asoc->str_reset = chk;
/* insert the chunk for sending */
TAILQ_INSERT_TAIL(&asoc->control_send_queue,
chk,
sctp_next);
asoc->ctrl_queue_cnt++;
if (stcb->asoc.send_sack) {
sctp_send_sack(stcb, SCTP_SO_LOCKED);
}
sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo);
return (0);
}
void
sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
/* Don't respond to an ABORT with an ABORT. */
if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) {
if (cause)
sctp_m_freem(cause);
return;
}
sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause,
mflowtype, mflowid, fibnum,
vrf_id, port);
return;
}
void
sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, uint32_t vtag, struct mbuf *cause,
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
uint32_t vrf_id, uint16_t port)
{
sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause,
mflowtype, mflowid, fibnum,
vrf_id, port);
return;
}
static struct mbuf *
sctp_copy_resume(struct uio *uio,
int max_send_len,
int user_marks_eor,
int *error,
uint32_t * sndout,
struct mbuf **new_tail)
{
struct mbuf *m;
m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0,
(M_PKTHDR | (user_marks_eor ? M_EOR : 0)));
if (m == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
*error = ENOBUFS;
} else {
*sndout = m_length(m, NULL);
*new_tail = m_last(m);
}
return (m);
}
static int
sctp_copy_one(struct sctp_stream_queue_pending *sp,
struct uio *uio,
int resv_upfront)
{
sp->data = m_uiotombuf(uio, M_WAITOK, sp->length,
resv_upfront, 0);
if (sp->data == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS);
return (ENOBUFS);
}
sp->tail_mbuf = m_last(sp->data);
return (0);
}
static struct sctp_stream_queue_pending *
sctp_copy_it_in(struct sctp_tcb *stcb,
struct sctp_association *asoc,
struct sctp_sndrcvinfo *srcv,
struct uio *uio,
struct sctp_nets *net,
int max_send_len,
int user_marks_eor,
int *error)
{
/*-
* This routine must be very careful in its work. Protocol
* processing is up and running so care must be taken to spl...()
* when you need to do something that may effect the stcb/asoc. The
* sb is locked however. When data is copied the protocol processing
* should be enabled since this is a slower operation...
*/
struct sctp_stream_queue_pending *sp = NULL;
int resv_in_first;
*error = 0;
/* Now can we send this? */
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
/* got data while shutting down */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
*error = ECONNRESET;
goto out_now;
}
sctp_alloc_a_strmoq(stcb, sp);
if (sp == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
*error = ENOMEM;
goto out_now;
}
sp->act_flags = 0;
sp->sender_all_done = 0;
sp->sinfo_flags = srcv->sinfo_flags;
sp->timetolive = srcv->sinfo_timetolive;
sp->ppid = srcv->sinfo_ppid;
sp->context = srcv->sinfo_context;
(void)SCTP_GETTIME_TIMEVAL(&sp->ts);
sp->stream = srcv->sinfo_stream;
sp->length = min(uio->uio_resid, max_send_len);
if ((sp->length == (uint32_t) uio->uio_resid) &&
((user_marks_eor == 0) ||
(srcv->sinfo_flags & SCTP_EOF) ||
(user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
sp->msg_is_complete = 1;
} else {
sp->msg_is_complete = 0;
}
sp->sender_all_done = 0;
sp->some_taken = 0;
sp->put_last_out = 0;
resv_in_first = sizeof(struct sctp_data_chunk);
sp->data = sp->tail_mbuf = NULL;
if (sp->length == 0) {
*error = 0;
goto skip_copy;
}
if (srcv->sinfo_keynumber_valid) {
sp->auth_keyid = srcv->sinfo_keynumber;
} else {
sp->auth_keyid = stcb->asoc.authinfo.active_keyid;
}
if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) {
sctp_auth_key_acquire(stcb, sp->auth_keyid);
sp->holds_key_ref = 1;
}
*error = sctp_copy_one(sp, uio, resv_in_first);
skip_copy:
if (*error) {
sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
sp = NULL;
} else {
if (sp->sinfo_flags & SCTP_ADDR_OVER) {
sp->net = net;
atomic_add_int(&sp->net->ref_count, 1);
} else {
sp->net = NULL;
}
sctp_set_prsctp_policy(sp);
}
out_now:
return (sp);
}
int
sctp_sosend(struct socket *so,
struct sockaddr *addr,
struct uio *uio,
struct mbuf *top,
struct mbuf *control,
int flags,
struct thread *p
)
{
int error, use_sndinfo = 0;
struct sctp_sndrcvinfo sndrcvninfo;
struct sockaddr *addr_to_use;
#if defined(INET) && defined(INET6)
struct sockaddr_in sin;
#endif
if (control) {
/* process cmsg snd/rcv info (maybe a assoc-id) */
if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control,
sizeof(sndrcvninfo))) {
/* got one */
use_sndinfo = 1;
}
}
addr_to_use = addr;
#if defined(INET) && defined(INET6)
if ((addr) && (addr->sa_family == AF_INET6)) {
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)addr;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
in6_sin6_2_sin(&sin, sin6);
addr_to_use = (struct sockaddr *)&sin;
}
}
#endif
error = sctp_lower_sosend(so, addr_to_use, uio, top,
control,
flags,
use_sndinfo ? &sndrcvninfo : NULL
,p
);
return (error);
}
int
sctp_lower_sosend(struct socket *so,
struct sockaddr *addr,
struct uio *uio,
struct mbuf *i_pak,
struct mbuf *control,
int flags,
struct sctp_sndrcvinfo *srcv
,
struct thread *p
)
{
unsigned int sndlen = 0, max_len;
int error, len;
struct mbuf *top = NULL;
int queue_only = 0, queue_only_for_init = 0;
int free_cnt_applied = 0;
int un_sent;
int now_filled = 0;
unsigned int inqueue_bytes = 0;
struct sctp_block_entry be;
struct sctp_inpcb *inp;
struct sctp_tcb *stcb = NULL;
struct timeval now;
struct sctp_nets *net;
struct sctp_association *asoc;
struct sctp_inpcb *t_inp;
int user_marks_eor;
int create_lock_applied = 0;
int nagle_applies = 0;
int some_on_control = 0;
int got_all_of_the_send = 0;
int hold_tcblock = 0;
int non_blocking = 0;
uint32_t local_add_more, local_soresv = 0;
uint16_t port;
uint16_t sinfo_flags;
sctp_assoc_t sinfo_assoc_id;
error = 0;
net = NULL;
stcb = NULL;
asoc = NULL;
t_inp = inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
if (i_pak) {
SCTP_RELEASE_PKT(i_pak);
}
return (error);
}
if ((uio == NULL) && (i_pak == NULL)) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
atomic_add_int(&inp->total_sends, 1);
if (uio) {
if (uio->uio_resid < 0) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
return (EINVAL);
}
sndlen = uio->uio_resid;
} else {
top = SCTP_HEADER_TO_CHAIN(i_pak);
sndlen = SCTP_HEADER_LEN(i_pak);
}
SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n",
(void *)addr,
sndlen);
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
(inp->sctp_socket->so_qlimit)) {
/* The listener can NOT send */
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
error = ENOTCONN;
goto out_unlocked;
}
/**
* Pre-screen address, if one is given the sin-len
* must be set correctly!
*/
if (addr) {
union sctp_sockstore *raddr = (union sctp_sockstore *)addr;
switch (raddr->sa.sa_family) {
#ifdef INET
case AF_INET:
if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
port = raddr->sin.sin_port;
break;
#endif
#ifdef INET6
case AF_INET6:
if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
port = raddr->sin6.sin6_port;
break;
#endif
default:
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT);
error = EAFNOSUPPORT;
goto out_unlocked;
}
} else
port = 0;
if (srcv) {
sinfo_flags = srcv->sinfo_flags;
sinfo_assoc_id = srcv->sinfo_assoc_id;
if (INVALID_SINFO_FLAG(sinfo_flags) ||
PR_SCTP_INVALID_POLICY(sinfo_flags)) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
if (srcv->sinfo_flags)
SCTP_STAT_INCR(sctps_sends_with_flags);
} else {
sinfo_flags = inp->def_send.sinfo_flags;
sinfo_assoc_id = inp->def_send.sinfo_assoc_id;
}
if (sinfo_flags & SCTP_SENDALL) {
/* its a sendall */
error = sctp_sendall(inp, uio, top, srcv);
top = NULL;
goto out_unlocked;
}
if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
/* now we must find the assoc */
if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
SCTP_INP_RLOCK(inp);
stcb = LIST_FIRST(&inp->sctp_asoc_list);
if (stcb) {
SCTP_TCB_LOCK(stcb);
hold_tcblock = 1;
}
SCTP_INP_RUNLOCK(inp);
} else if (sinfo_assoc_id) {
stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0);
} else if (addr) {
/*-
* Since we did not use findep we must
* increment it, and if we don't find a tcb
* decrement it.
*/
SCTP_INP_WLOCK(inp);
SCTP_INP_INCR_REF(inp);
SCTP_INP_WUNLOCK(inp);
stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
if (stcb == NULL) {
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
} else {
hold_tcblock = 1;
}
}
if ((stcb == NULL) && (addr)) {
/* Possible implicit send? */
SCTP_ASOC_CREATE_LOCK(inp);
create_lock_applied = 1;
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
/* Should I really unlock ? */
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) &&
(addr->sa_family == AF_INET6)) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
SCTP_INP_WLOCK(inp);
SCTP_INP_INCR_REF(inp);
SCTP_INP_WUNLOCK(inp);
/* With the lock applied look again */
stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL);
if ((stcb == NULL) && (control != NULL) && (port > 0)) {
stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error);
}
if (stcb == NULL) {
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
} else {
hold_tcblock = 1;
}
if (error) {
goto out_unlocked;
}
if (t_inp != inp) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN);
error = ENOTCONN;
goto out_unlocked;
}
}
if (stcb == NULL) {
if (addr == NULL) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
error = ENOENT;
goto out_unlocked;
} else {
/* We must go ahead and start the INIT process */
uint32_t vrf_id;
if ((sinfo_flags & SCTP_ABORT) ||
((sinfo_flags & SCTP_EOF) && (sndlen == 0))) {
/*-
* User asks to abort a non-existant assoc,
* or EOF a non-existant assoc with no data
*/
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT);
error = ENOENT;
goto out_unlocked;
}
/* get an asoc/stcb struct */
vrf_id = inp->def_vrf_id;
#ifdef INVARIANTS
if (create_lock_applied == 0) {
panic("Error, should hold create lock and I don't?");
}
#endif
stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id,
inp->sctp_ep.pre_open_stream_count,
p
);
if (stcb == NULL) {
/* Error is setup for us in the call */
goto out_unlocked;
}
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
/*
* Set the connected flag so we can queue
* data
*/
soisconnecting(so);
}
hold_tcblock = 1;
if (create_lock_applied) {
SCTP_ASOC_CREATE_UNLOCK(inp);
create_lock_applied = 0;
} else {
SCTP_PRINTF("Huh-3? create lock should have been on??\n");
}
/*
* Turn on queue only flag to prevent data from
* being sent
*/
queue_only = 1;
asoc = &stcb->asoc;
SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
/* initialize authentication params for the assoc */
sctp_initialize_auth_params(inp, stcb);
if (control) {
if (sctp_process_cmsgs_for_init(stcb, control, &error)) {
sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE,
SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5);
hold_tcblock = 0;
stcb = NULL;
goto out_unlocked;
}
}
/* out with the INIT */
queue_only_for_init = 1;
/*-
* we may want to dig in after this call and adjust the MTU
* value. It defaulted to 1500 (constant) but the ro
* structure may now have an update and thus we may need to
* change it BEFORE we append the message.
*/
}
} else
asoc = &stcb->asoc;
if (srcv == NULL)
srcv = (struct sctp_sndrcvinfo *)&asoc->def_send;
if (srcv->sinfo_flags & SCTP_ADDR_OVER) {
if (addr)
net = sctp_findnet(stcb, addr);
else
net = NULL;
if ((net == NULL) ||
((port != 0) && (port != stcb->rport))) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
} else {
if (stcb->asoc.alternate) {
net = stcb->asoc.alternate;
} else {
net = stcb->asoc.primary_destination;
}
}
atomic_add_int(&stcb->total_sends, 1);
/* Keep the stcb from being freed under our feet */
atomic_add_int(&asoc->refcnt, 1);
free_cnt_applied = 1;
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) {
if (sndlen > asoc->smallest_mtu) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
error = EMSGSIZE;
goto out_unlocked;
}
}
if (SCTP_SO_IS_NBIO(so)
|| (flags & MSG_NBIO)
) {
non_blocking = 1;
}
/* would we block? */
if (non_blocking) {
if (hold_tcblock == 0) {
SCTP_TCB_LOCK(stcb);
hold_tcblock = 1;
}
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) ||
(stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK);
if (sndlen > SCTP_SB_LIMIT_SND(so))
error = EMSGSIZE;
else
error = EWOULDBLOCK;
goto out_unlocked;
}
stcb->asoc.sb_send_resv += sndlen;
SCTP_TCB_UNLOCK(stcb);
hold_tcblock = 0;
} else {
atomic_add_int(&stcb->asoc.sb_send_resv, sndlen);
}
local_soresv = sndlen;
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
error = ECONNRESET;
goto out_unlocked;
}
if (create_lock_applied) {
SCTP_ASOC_CREATE_UNLOCK(inp);
create_lock_applied = 0;
}
/* Is the stream no. valid? */
if (srcv->sinfo_stream >= asoc->streamoutcnt) {
/* Invalid stream number */
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) &&
(asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) {
/*
* Can't queue any data while stream reset is underway.
*/
if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) {
error = EAGAIN;
} else {
error = EINVAL;
}
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error);
goto out_unlocked;
}
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
queue_only = 1;
}
/* we are now done with all control */
if (control) {
sctp_m_freem(control);
control = NULL;
}
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) ||
(asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) {
if (srcv->sinfo_flags & SCTP_ABORT) {
;
} else {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
error = ECONNRESET;
goto out_unlocked;
}
}
/* Ok, we will attempt a msgsnd :> */
if (p) {
p->td_ru.ru_msgsnd++;
}
/* Are we aborting? */
if (srcv->sinfo_flags & SCTP_ABORT) {
struct mbuf *mm;
int tot_demand, tot_out = 0, max_out;
SCTP_STAT_INCR(sctps_sends_with_abort);
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
/* It has to be up before we abort */
/* how big is the user initiated abort? */
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out;
}
if (hold_tcblock) {
SCTP_TCB_UNLOCK(stcb);
hold_tcblock = 0;
}
if (top) {
struct mbuf *cntm = NULL;
mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA);
if (sndlen != 0) {
for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) {
tot_out += SCTP_BUF_LEN(cntm);
}
}
} else {
/* Must fit in a MTU */
tot_out = sndlen;
tot_demand = (tot_out + sizeof(struct sctp_paramhdr));
if (tot_demand > SCTP_DEFAULT_ADD_MORE) {
/* To big */
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
error = EMSGSIZE;
goto out;
}
mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA);
}
if (mm == NULL) {
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM);
error = ENOMEM;
goto out;
}
max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr);
max_out -= sizeof(struct sctp_abort_msg);
if (tot_out > max_out) {
tot_out = max_out;
}
if (mm) {
struct sctp_paramhdr *ph;
/* now move forward the data pointer */
ph = mtod(mm, struct sctp_paramhdr *);
ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT);
ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out);
ph++;
SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr);
if (top == NULL) {
error = uiomove((caddr_t)ph, (int)tot_out, uio);
if (error) {
/*-
* Here if we can't get his data we
* still abort we just don't get to
* send the users note :-0
*/
sctp_m_freem(mm);
mm = NULL;
}
} else {
if (sndlen != 0) {
SCTP_BUF_NEXT(mm) = top;
}
}
}
if (hold_tcblock == 0) {
SCTP_TCB_LOCK(stcb);
}
atomic_add_int(&stcb->asoc.refcnt, -1);
free_cnt_applied = 0;
/* release this lock, otherwise we hang on ourselves */
sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED);
/* now relock the stcb so everything is sane */
hold_tcblock = 0;
stcb = NULL;
/*
* In this case top is already chained to mm avoid double
* free, since we free it below if top != NULL and driver
* would free it after sending the packet out
*/
if (sndlen != 0) {
top = NULL;
}
goto out_unlocked;
}
/* Calculate the maximum we can send */
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
if (non_blocking) {
/* we already checked for non-blocking above. */
max_len = sndlen;
} else {
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
}
} else {
max_len = 0;
}
if (hold_tcblock) {
SCTP_TCB_UNLOCK(stcb);
hold_tcblock = 0;
}
if (asoc->strmout == NULL) {
/* huh? software error */
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT);
error = EFAULT;
goto out_unlocked;
}
/* Unless E_EOR mode is on, we must make a send FIT in one call. */
if ((user_marks_eor == 0) &&
(sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) {
/* It will NEVER fit */
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE);
error = EMSGSIZE;
goto out_unlocked;
}
if ((uio == NULL) && user_marks_eor) {
/*-
* We do not support eeor mode for
* sending with mbuf chains (like sendfile).
*/
SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out_unlocked;
}
if (user_marks_eor) {
local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold));
} else {
/*-
* For non-eeor the whole message must fit in
* the socket send buffer.
*/
local_add_more = sndlen;
}
len = 0;
if (non_blocking) {
goto skip_preblock;
}
if (((max_len <= local_add_more) &&
(SCTP_SB_LIMIT_SND(so) >= local_add_more)) ||
(max_len == 0) ||
((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
/* No room right now ! */
SOCKBUF_LOCK(&so->so_snd);
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) ||
((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) {
SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n",
(unsigned int)SCTP_SB_LIMIT_SND(so),
inqueue_bytes,
local_add_more,
stcb->asoc.stream_queue_cnt,
stcb->asoc.chunks_on_out_queue,
SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue));
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen);
}
be.error = 0;
stcb->block_entry = &be;
error = sbwait(&so->so_snd);
stcb->block_entry = NULL;
if (error || so->so_error || be.error) {
if (error == 0) {
if (so->so_error)
error = so->so_error;
if (be.error) {
error = be.error;
}
}
SOCKBUF_UNLOCK(&so->so_snd);
goto out_unlocked;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
asoc, stcb->asoc.total_output_queue_size);
}
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
goto out_unlocked;
}
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
}
if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) {
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
} else {
max_len = 0;
}
SOCKBUF_UNLOCK(&so->so_snd);
}
skip_preblock:
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
goto out_unlocked;
}
/*
* sndlen covers for mbuf case uio_resid covers for the non-mbuf
* case NOTE: uio will be null when top/mbuf is passed
*/
if (sndlen == 0) {
if (srcv->sinfo_flags & SCTP_EOF) {
got_all_of_the_send = 1;
goto dataless_eof;
} else {
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out;
}
}
if (top == NULL) {
struct sctp_stream_queue_pending *sp;
struct sctp_stream_out *strm;
uint32_t sndout;
SCTP_TCB_SEND_LOCK(stcb);
if ((asoc->stream_locked) &&
(asoc->stream_locked_on != srcv->sinfo_stream)) {
SCTP_TCB_SEND_UNLOCK(stcb);
SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL);
error = EINVAL;
goto out;
}
SCTP_TCB_SEND_UNLOCK(stcb);
strm = &stcb->asoc.strmout[srcv->sinfo_stream];
if (strm->last_msg_incomplete == 0) {
do_a_copy_in:
sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error);
if ((sp == NULL) || (error)) {
goto out;
}
SCTP_TCB_SEND_LOCK(stcb);
if (sp->msg_is_complete) {
strm->last_msg_incomplete = 0;
asoc->stream_locked = 0;
} else {
/*
* Just got locked to this guy in case of an
* interrupt.
*/
strm->last_msg_incomplete = 1;
asoc->stream_locked = 1;
asoc->stream_locked_on = srcv->sinfo_stream;
sp->sender_all_done = 0;
}
sctp_snd_sb_alloc(stcb, sp->length);
atomic_add_int(&asoc->stream_queue_cnt, 1);
if (srcv->sinfo_flags & SCTP_UNORDERED) {
SCTP_STAT_INCR(sctps_sends_with_unord);
}
TAILQ_INSERT_TAIL(&strm->outqueue, sp, next);
stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1);
SCTP_TCB_SEND_UNLOCK(stcb);
} else {
SCTP_TCB_SEND_LOCK(stcb);
sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead);
SCTP_TCB_SEND_UNLOCK(stcb);
if (sp == NULL) {
/* ???? Huh ??? last msg is gone */
#ifdef INVARIANTS
panic("Warning: Last msg marked incomplete, yet nothing left?");
#else
SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n");
strm->last_msg_incomplete = 0;
#endif
goto do_a_copy_in;
}
}
while (uio->uio_resid > 0) {
/* How much room do we have? */
struct mbuf *new_tail, *mm;
if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size;
else
max_len = 0;
if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) ||
(max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) ||
(uio->uio_resid && (uio->uio_resid <= (int)max_len))) {
sndout = 0;
new_tail = NULL;
if (hold_tcblock) {
SCTP_TCB_UNLOCK(stcb);
hold_tcblock = 0;
}
mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail);
if ((mm == NULL) || error) {
if (mm) {
sctp_m_freem(mm);
}
goto out;
}
/* Update the mbuf and count */
SCTP_TCB_SEND_LOCK(stcb);
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
/*
* we need to get out. Peer probably
* aborted.
*/
sctp_m_freem(mm);
if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET);
error = ECONNRESET;
}
SCTP_TCB_SEND_UNLOCK(stcb);
goto out;
}
if (sp->tail_mbuf) {
/* tack it to the end */
SCTP_BUF_NEXT(sp->tail_mbuf) = mm;
sp->tail_mbuf = new_tail;
} else {
/* A stolen mbuf */
sp->data = mm;
sp->tail_mbuf = new_tail;
}
sctp_snd_sb_alloc(stcb, sndout);
atomic_add_int(&sp->length, sndout);
len += sndout;
/* Did we reach EOR? */
if ((uio->uio_resid == 0) &&
((user_marks_eor == 0) ||
(srcv->sinfo_flags & SCTP_EOF) ||
(user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) {
sp->msg_is_complete = 1;
} else {
sp->msg_is_complete = 0;
}
SCTP_TCB_SEND_UNLOCK(stcb);
}
if (uio->uio_resid == 0) {
/* got it all? */
continue;
}
/* PR-SCTP? */
if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) {
/*
* This is ugly but we must assure locking
* order
*/
if (hold_tcblock == 0) {
SCTP_TCB_LOCK(stcb);
hold_tcblock = 1;
}
sctp_prune_prsctp(stcb, asoc, srcv, sndlen);
inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk));
if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size)
max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes;
else
max_len = 0;
if (max_len > 0) {
continue;
}
SCTP_TCB_UNLOCK(stcb);
hold_tcblock = 0;
}
/* wait for space now */
if (non_blocking) {
/* Non-blocking io in place out */
goto skip_out_eof;
}
/* What about the INIT, send it maybe */
if (queue_only_for_init) {
if (hold_tcblock == 0) {
SCTP_TCB_LOCK(stcb);
hold_tcblock = 1;
}
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
/* a collision took us forward? */
queue_only = 0;
} else {
sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT);
queue_only = 1;
}
}
if ((net->flight_size > net->cwnd) &&
(asoc->sctp_cmt_on_off == 0)) {
SCTP_STAT_INCR(sctps_send_cwnd_avoid);
queue_only = 1;
} else if (asoc->ifp_had_enobuf) {
SCTP_STAT_INCR(sctps_ifnomemqueued);
if (net->flight_size > (2 * net->mtu)) {
queue_only = 1;
}
asoc->ifp_had_enobuf = 0;
}
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(stcb->asoc.total_flight > 0) &&
(stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
(un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
/*-
* Ok, Nagle is set on and we have data outstanding.
* Don't send anything and let SACKs drive out the
* data unless we have a "full" segment to send.
*/
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
}
SCTP_STAT_INCR(sctps_naglequeued);
nagle_applies = 1;
} else {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
}
SCTP_STAT_INCR(sctps_naglesent);
nagle_applies = 0;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
nagle_applies, un_sent);
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
stcb->asoc.total_flight,
stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
}
if (queue_only_for_init)
queue_only_for_init = 0;
if ((queue_only == 0) && (nagle_applies == 0)) {
/*-
* need to start chunk output
* before blocking.. note that if
* a lock is already applied, then
* the input via the net is happening
* and I don't need to start output :-D
*/
if (hold_tcblock == 0) {
if (SCTP_TCB_TRYLOCK(stcb)) {
hold_tcblock = 1;
sctp_chunk_output(inp,
stcb,
SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
}
} else {
sctp_chunk_output(inp,
stcb,
SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
}
if (hold_tcblock == 1) {
SCTP_TCB_UNLOCK(stcb);
hold_tcblock = 0;
}
}
SOCKBUF_LOCK(&so->so_snd);
/*-
* This is a bit strange, but I think it will
* work. The total_output_queue_size is locked and
* protected by the TCB_LOCK, which we just released.
* There is a race that can occur between releasing it
* above, and me getting the socket lock, where sacks
* come in but we have not put the SB_WAIT on the
* so_snd buffer to get the wakeup. After the LOCK
* is applied the sack_processing will also need to
* LOCK the so->so_snd to do the actual sowwakeup(). So
* once we have the socket buffer lock if we recheck the
* size we KNOW we will get to sleep safely with the
* wakeup flag in place.
*/
if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size +
min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK,
asoc, uio->uio_resid);
}
be.error = 0;
stcb->block_entry = &be;
error = sbwait(&so->so_snd);
stcb->block_entry = NULL;
if (error || so->so_error || be.error) {
if (error == 0) {
if (so->so_error)
error = so->so_error;
if (be.error) {
error = be.error;
}
}
SOCKBUF_UNLOCK(&so->so_snd);
goto out_unlocked;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK,
asoc, stcb->asoc.total_output_queue_size);
}
}
SOCKBUF_UNLOCK(&so->so_snd);
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
goto out_unlocked;
}
}
SCTP_TCB_SEND_LOCK(stcb);
if (sp) {
if (sp->msg_is_complete == 0) {
strm->last_msg_incomplete = 1;
asoc->stream_locked = 1;
asoc->stream_locked_on = srcv->sinfo_stream;
} else {
sp->sender_all_done = 1;
strm->last_msg_incomplete = 0;
asoc->stream_locked = 0;
}
} else {
SCTP_PRINTF("Huh no sp TSNH?\n");
strm->last_msg_incomplete = 0;
asoc->stream_locked = 0;
}
SCTP_TCB_SEND_UNLOCK(stcb);
if (uio->uio_resid == 0) {
got_all_of_the_send = 1;
}
} else {
/* We send in a 0, since we do NOT have any locks */
error = sctp_msg_append(stcb, net, top, srcv, 0);
top = NULL;
if (srcv->sinfo_flags & SCTP_EOF) {
/*
* This should only happen for Panda for the mbuf
* send case, which does NOT yet support EEOR mode.
* Thus, we can just set this flag to do the proper
* EOF handling.
*/
got_all_of_the_send = 1;
}
}
if (error) {
goto out;
}
dataless_eof:
/* EOF thing ? */
if ((srcv->sinfo_flags & SCTP_EOF) &&
(got_all_of_the_send == 1)) {
int cnt;
SCTP_STAT_INCR(sctps_sends_with_eof);
error = 0;
if (hold_tcblock == 0) {
SCTP_TCB_LOCK(stcb);
hold_tcblock = 1;
}
cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED);
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
(cnt == 0)) {
if (asoc->locked_on_sending) {
goto abort_anyway;
}
/* there is nothing queued to send, so I'm done... */
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
struct sctp_nets *netp;
/* only send SHUTDOWN the first time through */
if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT);
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
sctp_stop_timers_for_shutdown(stcb);
if (stcb->asoc.alternate) {
netp = stcb->asoc.alternate;
} else {
netp = stcb->asoc.primary_destination;
}
sctp_send_shutdown(stcb, netp);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
netp);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
asoc->primary_destination);
}
} else {
/*-
* we still got (or just got) data to send, so set
* SHUTDOWN_PENDING
*/
/*-
* XXX sockets draft says that SCTP_EOF should be
* sent with no data. currently, we will allow user
* data to be sent first and move to
* SHUTDOWN-PENDING
*/
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
if (hold_tcblock == 0) {
SCTP_TCB_LOCK(stcb);
hold_tcblock = 1;
}
if (asoc->locked_on_sending) {
/* Locked to send out the data */
struct sctp_stream_queue_pending *sp;
sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead);
if (sp) {
if ((sp->length == 0) && (sp->msg_is_complete == 0))
asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT;
}
}
asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
(asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
struct mbuf *op_err;
char msg[SCTP_DIAG_INFO_LEN];
abort_anyway:
if (free_cnt_applied) {
atomic_add_int(&stcb->asoc.refcnt, -1);
free_cnt_applied = 0;
}
snprintf(msg, sizeof(msg),
"%s:%d at %s", __FILE__, __LINE__, __func__);
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
msg);
sctp_abort_an_association(stcb->sctp_ep, stcb,
op_err, SCTP_SO_LOCKED);
/*
* now relock the stcb so everything
* is sane
*/
hold_tcblock = 0;
stcb = NULL;
goto out;
}
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb,
asoc->primary_destination);
sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY);
}
}
}
skip_out_eof:
if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
some_on_control = 1;
}
if (queue_only_for_init) {
if (hold_tcblock == 0) {
SCTP_TCB_LOCK(stcb);
hold_tcblock = 1;
}
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) {
/* a collision took us forward? */
queue_only = 0;
} else {
sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED);
SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT);
queue_only = 1;
}
}
if ((net->flight_size > net->cwnd) &&
(stcb->asoc.sctp_cmt_on_off == 0)) {
SCTP_STAT_INCR(sctps_send_cwnd_avoid);
queue_only = 1;
} else if (asoc->ifp_had_enobuf) {
SCTP_STAT_INCR(sctps_ifnomemqueued);
if (net->flight_size > (2 * net->mtu)) {
queue_only = 1;
}
asoc->ifp_had_enobuf = 0;
}
un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) +
(stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk)));
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) &&
(stcb->asoc.total_flight > 0) &&
(stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) &&
(un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) {
/*-
* Ok, Nagle is set on and we have data outstanding.
* Don't send anything and let SACKs drive out the
* data unless wen have a "full" segment to send.
*/
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED);
}
SCTP_STAT_INCR(sctps_naglequeued);
nagle_applies = 1;
} else {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) {
if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY))
sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED);
}
SCTP_STAT_INCR(sctps_naglesent);
nagle_applies = 0;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only,
nagle_applies, un_sent);
sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size,
stcb->asoc.total_flight,
stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count);
}
if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) {
/* we can attempt to send too. */
if (hold_tcblock == 0) {
/*
* If there is activity recv'ing sacks no need to
* send
*/
if (SCTP_TCB_TRYLOCK(stcb)) {
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
hold_tcblock = 1;
}
} else {
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
}
} else if ((queue_only == 0) &&
(stcb->asoc.peers_rwnd == 0) &&
(stcb->asoc.total_flight == 0)) {
/* We get to have a probe outstanding */
if (hold_tcblock == 0) {
hold_tcblock = 1;
SCTP_TCB_LOCK(stcb);
}
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED);
} else if (some_on_control) {
int num_out, reason, frag_point;
/* Here we do control only */
if (hold_tcblock == 0) {
hold_tcblock = 1;
SCTP_TCB_LOCK(stcb);
}
frag_point = sctp_get_frag_point(stcb, &stcb->asoc);
(void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out,
&reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED);
}
SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n",
queue_only, stcb->asoc.peers_rwnd, un_sent,
stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue,
stcb->asoc.total_output_queue_size, error);
out:
out_unlocked:
if (local_soresv && stcb) {
atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen);
}
if (create_lock_applied) {
SCTP_ASOC_CREATE_UNLOCK(inp);
}
if ((stcb) && hold_tcblock) {
SCTP_TCB_UNLOCK(stcb);
}
if (stcb && free_cnt_applied) {
atomic_add_int(&stcb->asoc.refcnt, -1);
}
#ifdef INVARIANTS
if (stcb) {
if (mtx_owned(&stcb->tcb_mtx)) {
panic("Leaving with tcb mtx owned?");
}
if (mtx_owned(&stcb->tcb_send_mtx)) {
panic("Leaving with tcb send mtx owned?");
}
}
#endif
-#ifdef INVARIANTS
- if (inp) {
- sctp_validate_no_locks(inp);
- } else {
- SCTP_PRINTF("Warning - inp is NULL so cant validate locks\n");
- }
-#endif
if (top) {
sctp_m_freem(top);
}
if (control) {
sctp_m_freem(control);
}
return (error);
}
/*
* generate an AUTHentication chunk, if required
*/
struct mbuf *
sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end,
struct sctp_auth_chunk **auth_ret, uint32_t * offset,
struct sctp_tcb *stcb, uint8_t chunk)
{
struct mbuf *m_auth;
struct sctp_auth_chunk *auth;
int chunk_len;
struct mbuf *cn;
if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) ||
(stcb == NULL))
return (m);
if (stcb->asoc.auth_supported == 0) {
return (m);
}
/* does the requested chunk require auth? */
if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) {
return (m);
}
m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER);
if (m_auth == NULL) {
/* no mbuf's */
return (m);
}
/* reserve some space if this will be the first mbuf */
if (m == NULL)
SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD);
/* fill in the AUTH chunk details */
auth = mtod(m_auth, struct sctp_auth_chunk *);
bzero(auth, sizeof(*auth));
auth->ch.chunk_type = SCTP_AUTHENTICATION;
auth->ch.chunk_flags = 0;
chunk_len = sizeof(*auth) +
sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id);
auth->ch.chunk_length = htons(chunk_len);
auth->hmac_id = htons(stcb->asoc.peer_hmac_id);
/* key id and hmac digest will be computed and filled in upon send */
/* save the offset where the auth was inserted into the chain */
*offset = 0;
for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) {
*offset += SCTP_BUF_LEN(cn);
}
/* update length and return pointer to the auth chunk */
SCTP_BUF_LEN(m_auth) = chunk_len;
m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0);
if (auth_ret != NULL)
*auth_ret = auth;
return (m);
}
#ifdef INET6
int
sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro)
{
struct nd_prefix *pfx = NULL;
struct nd_pfxrouter *pfxrtr = NULL;
struct sockaddr_in6 gw6;
if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6)
return (0);
/* get prefix entry of address */
LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) {
if (pfx->ndpr_stateflags & NDPRF_DETACHED)
continue;
if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr,
&src6->sin6_addr, &pfx->ndpr_mask))
break;
}
/* no prefix entry in the prefix list */
if (pfx == NULL) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
return (0);
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6);
/* search installed gateway from prefix entry */
LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) {
memset(&gw6, 0, sizeof(struct sockaddr_in6));
gw6.sin6_family = AF_INET6;
gw6.sin6_len = sizeof(struct sockaddr_in6);
memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr,
sizeof(struct in6_addr));
SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6);
SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
if (sctp_cmpaddr((struct sockaddr *)&gw6,
ro->ro_rt->rt_gateway)) {
SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n");
return (1);
}
}
SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n");
return (0);
}
#endif
int
sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro)
{
#ifdef INET
struct sockaddr_in *sin, *mask;
struct ifaddr *ifa;
struct in_addr srcnetaddr, gwnetaddr;
if (ro == NULL || ro->ro_rt == NULL ||
sifa->address.sa.sa_family != AF_INET) {
return (0);
}
ifa = (struct ifaddr *)sifa->ifa;
mask = (struct sockaddr_in *)(ifa->ifa_netmask);
sin = &sifa->address.sin;
srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa);
SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr);
sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway;
gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr);
SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is ");
SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway);
SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr);
if (srcnetaddr.s_addr == gwnetaddr.s_addr) {
return (1);
}
#endif
return (0);
}
Index: stable/10/sys/netinet/sctp_pcb.h
===================================================================
--- stable/10/sys/netinet/sctp_pcb.h (revision 294215)
+++ stable/10/sys/netinet/sctp_pcb.h (revision 294216)
@@ -1,664 +1,658 @@
/*-
* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef _NETINET_SCTP_PCB_H_
#define _NETINET_SCTP_PCB_H_
#include <netinet/sctp_os.h>
#include <netinet/sctp.h>
#include <netinet/sctp_constants.h>
#include <netinet/sctp_sysctl.h>
LIST_HEAD(sctppcbhead, sctp_inpcb);
LIST_HEAD(sctpasochead, sctp_tcb);
LIST_HEAD(sctpladdr, sctp_laddr);
LIST_HEAD(sctpvtaghead, sctp_tagblock);
LIST_HEAD(sctp_vrflist, sctp_vrf);
LIST_HEAD(sctp_ifnlist, sctp_ifn);
LIST_HEAD(sctp_ifalist, sctp_ifa);
TAILQ_HEAD(sctp_readhead, sctp_queued_to_read);
TAILQ_HEAD(sctp_streamhead, sctp_stream_queue_pending);
#include <netinet/sctp_structs.h>
#include <netinet/sctp_auth.h>
#define SCTP_PCBHASH_ALLADDR(port, mask) (port & mask)
#define SCTP_PCBHASH_ASOC(tag, mask) (tag & mask)
struct sctp_vrf {
LIST_ENTRY(sctp_vrf) next_vrf;
struct sctp_ifalist *vrf_addr_hash;
struct sctp_ifnlist ifnlist;
uint32_t vrf_id;
uint32_t tbl_id_v4; /* default v4 table id */
uint32_t tbl_id_v6; /* default v6 table id */
uint32_t total_ifa_count;
u_long vrf_addr_hashmark;
uint32_t refcount;
};
struct sctp_ifn {
struct sctp_ifalist ifalist;
struct sctp_vrf *vrf;
LIST_ENTRY(sctp_ifn) next_ifn;
LIST_ENTRY(sctp_ifn) next_bucket;
void *ifn_p; /* never access without appropriate lock */
uint32_t ifn_mtu;
uint32_t ifn_type;
uint32_t ifn_index; /* shorthand way to look at ifn for reference */
uint32_t refcount; /* number of reference held should be >=
* ifa_count */
uint32_t ifa_count; /* IFA's we hold (in our list - ifalist) */
uint32_t num_v6; /* number of v6 addresses */
uint32_t num_v4; /* number of v4 addresses */
uint32_t registered_af; /* registered address family for i/f events */
char ifn_name[SCTP_IFNAMSIZ];
};
/* SCTP local IFA flags */
#define SCTP_ADDR_VALID 0x00000001 /* its up and active */
#define SCTP_BEING_DELETED 0x00000002 /* being deleted, when
* refcount = 0. Note that it
* is pulled from the ifn list
* and ifa_p is nulled right
* away but it cannot be freed
* until the last *net
* pointing to it is deleted. */
#define SCTP_ADDR_DEFER_USE 0x00000004 /* Hold off using this one */
#define SCTP_ADDR_IFA_UNUSEABLE 0x00000008
struct sctp_ifa {
LIST_ENTRY(sctp_ifa) next_ifa;
LIST_ENTRY(sctp_ifa) next_bucket;
struct sctp_ifn *ifn_p; /* back pointer to parent ifn */
void *ifa; /* pointer to ifa, needed for flag update for
* that we MUST lock appropriate locks. This
* is for V6. */
union sctp_sockstore address;
uint32_t refcount; /* number of folks refering to this */
uint32_t flags;
uint32_t localifa_flags;
uint32_t vrf_id; /* vrf_id of this addr (for deleting) */
uint8_t src_is_loop;
uint8_t src_is_priv;
uint8_t src_is_glob;
uint8_t resv;
};
struct sctp_laddr {
LIST_ENTRY(sctp_laddr) sctp_nxt_addr; /* next in list */
struct sctp_ifa *ifa;
uint32_t action; /* Used during asconf and adding if no-zero
* src-addr selection will not consider this
* address. */
struct timeval start_time; /* time when this address was created */
};
struct sctp_block_entry {
int error;
};
struct sctp_timewait {
uint32_t tv_sec_at_expire; /* the seconds from boot to expire */
uint32_t v_tag; /* the vtag that can not be reused */
uint16_t lport; /* the local port used in vtag */
uint16_t rport; /* the remote port used in vtag */
};
struct sctp_tagblock {
LIST_ENTRY(sctp_tagblock) sctp_nxt_tagblock;
struct sctp_timewait vtag_block[SCTP_NUMBER_IN_VTAG_BLOCK];
};
struct sctp_epinfo {
#ifdef INET
struct socket *udp4_tun_socket;
#endif
#ifdef INET6
struct socket *udp6_tun_socket;
#endif
struct sctpasochead *sctp_asochash;
u_long hashasocmark;
struct sctppcbhead *sctp_ephash;
u_long hashmark;
/*-
* The TCP model represents a substantial overhead in that we get an
* additional hash table to keep explicit connections in. The
* listening TCP endpoint will exist in the usual ephash above and
* accept only INIT's. It will be incapable of sending off an INIT.
* When a dg arrives we must look in the normal ephash. If we find a
* TCP endpoint that will tell us to go to the specific endpoint
* hash and re-hash to find the right assoc/socket. If we find a UDP
* model socket we then must complete the lookup. If this fails,
* i.e. no association can be found then we must continue to see if
* a sctp_peeloff()'d socket is in the tcpephash (a spun off socket
* acts like a TCP model connected socket).
*/
struct sctppcbhead *sctp_tcpephash;
u_long hashtcpmark;
uint32_t hashtblsize;
struct sctp_vrflist *sctp_vrfhash;
u_long hashvrfmark;
struct sctp_ifnlist *vrf_ifn_hash;
u_long vrf_ifn_hashmark;
struct sctppcbhead listhead;
struct sctpladdr addr_wq;
/* ep zone info */
sctp_zone_t ipi_zone_ep;
sctp_zone_t ipi_zone_asoc;
sctp_zone_t ipi_zone_laddr;
sctp_zone_t ipi_zone_net;
sctp_zone_t ipi_zone_chunk;
sctp_zone_t ipi_zone_readq;
sctp_zone_t ipi_zone_strmoq;
sctp_zone_t ipi_zone_asconf;
sctp_zone_t ipi_zone_asconf_ack;
struct rwlock ipi_ep_mtx;
struct mtx ipi_iterator_wq_mtx;
struct rwlock ipi_addr_mtx;
struct mtx ipi_pktlog_mtx;
struct mtx wq_addr_mtx;
uint32_t ipi_count_ep;
/* assoc/tcb zone info */
uint32_t ipi_count_asoc;
/* local addrlist zone info */
uint32_t ipi_count_laddr;
/* remote addrlist zone info */
uint32_t ipi_count_raddr;
/* chunk structure list for output */
uint32_t ipi_count_chunk;
/* socket queue zone info */
uint32_t ipi_count_readq;
/* socket queue zone info */
uint32_t ipi_count_strmoq;
/* Number of vrfs */
uint32_t ipi_count_vrfs;
/* Number of ifns */
uint32_t ipi_count_ifns;
/* Number of ifas */
uint32_t ipi_count_ifas;
/* system wide number of free chunks hanging around */
uint32_t ipi_free_chunks;
uint32_t ipi_free_strmoq;
struct sctpvtaghead vtag_timewait[SCTP_STACK_VTAG_HASH_SIZE];
/* address work queue handling */
struct sctp_timer addr_wq_timer;
};
struct sctp_base_info {
/*
* All static structures that anchor the system must be here.
*/
struct sctp_epinfo sctppcbinfo;
#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
struct sctpstat *sctpstat;
#else
struct sctpstat sctpstat;
#endif
struct sctp_sysctl sctpsysctl;
uint8_t first_time;
char sctp_pcb_initialized;
#if defined(SCTP_PACKET_LOGGING)
int packet_log_writers;
int packet_log_end;
uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
#endif
};
/*-
* Here we have all the relevant information for each SCTP entity created. We
* will need to modify this as approprate. We also need to figure out how to
* access /dev/random.
*/
struct sctp_pcb {
unsigned int time_of_secret_change; /* number of seconds from
* timeval.tv_sec */
uint32_t secret_key[SCTP_HOW_MANY_SECRETS][SCTP_NUMBER_OF_SECRETS];
unsigned int size_of_a_cookie;
unsigned int sctp_timeoutticks[SCTP_NUM_TMRS];
unsigned int sctp_minrto;
unsigned int sctp_maxrto;
unsigned int initial_rto;
int initial_init_rto_max;
unsigned int sctp_sack_freq;
uint32_t sctp_sws_sender;
uint32_t sctp_sws_receiver;
uint32_t sctp_default_cc_module;
uint32_t sctp_default_ss_module;
/* authentication related fields */
struct sctp_keyhead shared_keys;
sctp_auth_chklist_t *local_auth_chunks;
sctp_hmaclist_t *local_hmacs;
uint16_t default_keyid;
/* various thresholds */
/* Max times I will init at a guy */
uint16_t max_init_times;
/* Max times I will send before we consider someone dead */
uint16_t max_send_times;
uint16_t def_net_failure;
uint16_t def_net_pf_threshold;
/* number of streams to pre-open on a association */
uint16_t pre_open_stream_count;
uint16_t max_open_streams_intome;
/* random number generator */
uint32_t random_counter;
uint8_t random_numbers[SCTP_SIGNATURE_ALOC_SIZE];
uint8_t random_store[SCTP_SIGNATURE_ALOC_SIZE];
/*
* This timer is kept running per endpoint. When it fires it will
* change the secret key. The default is once a hour
*/
struct sctp_timer signature_change;
/* Zero copy full buffer timer */
struct sctp_timer zero_copy_timer;
/* Zero copy app to transport (sendq) read repulse timer */
struct sctp_timer zero_copy_sendq_timer;
uint32_t def_cookie_life;
/* defaults to 0 */
int auto_close_time;
uint32_t initial_sequence_debug;
uint32_t adaptation_layer_indicator;
uint8_t adaptation_layer_indicator_provided;
uint32_t store_at;
uint32_t max_burst;
uint32_t fr_max_burst;
#ifdef INET6
uint32_t default_flowlabel;
#endif
uint8_t default_dscp;
char current_secret_number;
char last_secret_number;
uint16_t port; /* remote UDP encapsulation port */
};
#ifndef SCTP_ALIGNMENT
#define SCTP_ALIGNMENT 32
#endif
#ifndef SCTP_ALIGNM1
#define SCTP_ALIGNM1 (SCTP_ALIGNMENT-1)
#endif
#define sctp_lport ip_inp.inp.inp_lport
struct sctp_pcbtsn_rlog {
uint32_t vtag;
uint16_t strm;
uint16_t seq;
uint16_t sz;
uint16_t flgs;
};
#define SCTP_READ_LOG_SIZE 135 /* we choose the number to make a pcb a page */
struct sctp_inpcb {
/*-
* put an inpcb in front of it all, kind of a waste but we need to
* for compatability with all the other stuff.
*/
union {
struct inpcb inp;
char align[(sizeof(struct in6pcb) + SCTP_ALIGNM1) &
~SCTP_ALIGNM1];
} ip_inp;
/* Socket buffer lock protects read_queue and of course sb_cc */
struct sctp_readhead read_queue;
LIST_ENTRY(sctp_inpcb) sctp_list; /* lists all endpoints */
/* hash of all endpoints for model */
LIST_ENTRY(sctp_inpcb) sctp_hash;
/* count of local addresses bound, 0 if bound all */
int laddr_count;
/* list of addrs in use by the EP, NULL if bound-all */
struct sctpladdr sctp_addr_list;
/*
* used for source address selection rotation when we are subset
* bound
*/
struct sctp_laddr *next_addr_touse;
/* back pointer to our socket */
struct socket *sctp_socket;
uint64_t sctp_features; /* Feature flags */
uint32_t sctp_flags; /* INP state flag set */
uint32_t sctp_mobility_features; /* Mobility Feature flags */
struct sctp_pcb sctp_ep;/* SCTP ep data */
/* head of the hash of all associations */
struct sctpasochead *sctp_tcbhash;
u_long sctp_hashmark;
/* head of the list of all associations */
struct sctpasochead sctp_asoc_list;
#ifdef SCTP_TRACK_FREED_ASOCS
struct sctpasochead sctp_asoc_free_list;
#endif
struct sctp_iterator *inp_starting_point_for_iterator;
uint32_t sctp_frag_point;
uint32_t partial_delivery_point;
uint32_t sctp_context;
uint32_t max_cwnd;
uint8_t local_strreset_support;
uint32_t sctp_cmt_on_off;
uint8_t ecn_supported;
uint8_t prsctp_supported;
uint8_t auth_supported;
uint8_t asconf_supported;
uint8_t reconfig_supported;
uint8_t nrsack_supported;
uint8_t pktdrop_supported;
struct sctp_nonpad_sndrcvinfo def_send;
/*-
* These three are here for the sosend_dgram
* (pkt, pkt_last and control).
* routine. However, I don't think anyone in
* the current FreeBSD kernel calls this. So
* they are candidates with sctp_sendm for
* de-supporting.
*/
struct mbuf *pkt, *pkt_last;
struct mbuf *control;
struct mtx inp_mtx;
struct mtx inp_create_mtx;
struct mtx inp_rdata_mtx;
int32_t refcount;
uint32_t def_vrf_id;
uint16_t fibnum;
uint32_t total_sends;
uint32_t total_recvs;
uint32_t last_abort_code;
uint32_t total_nospaces;
struct sctpasochead *sctp_asocidhash;
u_long hashasocidmark;
uint32_t sctp_associd_counter;
#ifdef SCTP_ASOCLOG_OF_TSNS
struct sctp_pcbtsn_rlog readlog[SCTP_READ_LOG_SIZE];
uint32_t readlog_index;
#endif
};
struct sctp_tcb {
struct socket *sctp_socket; /* back pointer to socket */
struct sctp_inpcb *sctp_ep; /* back pointer to ep */
LIST_ENTRY(sctp_tcb) sctp_tcbhash; /* next link in hash
* table */
LIST_ENTRY(sctp_tcb) sctp_tcblist; /* list of all of the
* TCB's */
LIST_ENTRY(sctp_tcb) sctp_tcbasocidhash; /* next link in asocid
* hash table */
LIST_ENTRY(sctp_tcb) sctp_asocs; /* vtag hash list */
struct sctp_block_entry *block_entry; /* pointer locked by socket
* send buffer */
struct sctp_association asoc;
/*-
* freed_by_sorcv_sincelast is protected by the sockbuf_lock NOT the
* tcb_lock. Its special in this way to help avoid extra mutex calls
* in the reading of data.
*/
uint32_t freed_by_sorcv_sincelast;
uint32_t total_sends;
uint32_t total_recvs;
int freed_from_where;
uint16_t rport; /* remote port in network format */
uint16_t resv;
struct mtx tcb_mtx;
struct mtx tcb_send_mtx;
};
#include <netinet/sctp_lock_bsd.h>
/* TODO where to put non-_KERNEL things for __Userspace__? */
#if defined(_KERNEL) || defined(__Userspace__)
/* Attention Julian, this is the extern that
* goes with the base info. sctp_pcb.c has
* the real definition.
*/
VNET_DECLARE(struct sctp_base_info, system_base_info);
#ifdef INET6
int SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b);
#endif
void sctp_fill_pcbinfo(struct sctp_pcbinfo *);
struct sctp_ifn *
sctp_find_ifn(void *ifn, uint32_t ifn_index);
struct sctp_vrf *sctp_allocate_vrf(int vrfid);
struct sctp_vrf *sctp_find_vrf(uint32_t vrfid);
void sctp_free_vrf(struct sctp_vrf *vrf);
/*-
* Change address state, can be used if
* O/S supports telling transports about
* changes to IFA/IFN's (link layer triggers).
* If a ifn goes down, we will do src-addr-selection
* and NOT use that, as a source address. This does
* not stop the routing system from routing out
* that interface, but we won't put it as a source.
*/
void sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index);
void sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index);
struct sctp_ifa *
sctp_add_addr_to_vrf(uint32_t vrfid,
void *ifn, uint32_t ifn_index, uint32_t ifn_type,
const char *if_name,
void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
int dynamic_add);
void sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu);
void sctp_free_ifn(struct sctp_ifn *sctp_ifnp);
void sctp_free_ifa(struct sctp_ifa *sctp_ifap);
void
sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr,
uint32_t ifn_index, const char *if_name);
struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *);
struct sctp_inpcb *sctp_pcb_findep(struct sockaddr *, int, int, uint32_t);
int
sctp_inpcb_bind(struct socket *, struct sockaddr *,
struct sctp_ifa *, struct thread *);
struct sctp_tcb *
sctp_findassociation_addr(struct mbuf *, int,
struct sockaddr *, struct sockaddr *,
struct sctphdr *, struct sctp_chunkhdr *, struct sctp_inpcb **,
struct sctp_nets **, uint32_t vrf_id);
struct sctp_tcb *
sctp_findassociation_addr_sa(struct sockaddr *,
struct sockaddr *, struct sctp_inpcb **, struct sctp_nets **, int, uint32_t);
void
sctp_move_pcb_and_assoc(struct sctp_inpcb *, struct sctp_inpcb *,
struct sctp_tcb *);
/*-
* For this call ep_addr, the to is the destination endpoint address of the
* peer (relative to outbound). The from field is only used if the TCP model
* is enabled and helps distingush amongst the subset bound (non-boundall).
* The TCP model MAY change the actual ep field, this is why it is passed.
*/
struct sctp_tcb *
sctp_findassociation_ep_addr(struct sctp_inpcb **,
struct sockaddr *, struct sctp_nets **, struct sockaddr *,
struct sctp_tcb *);
struct sctp_tcb *
sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock);
struct sctp_tcb *
sctp_findassociation_ep_asocid(struct sctp_inpcb *,
sctp_assoc_t, int);
struct sctp_tcb *
sctp_findassociation_ep_asconf(struct mbuf *, int, struct sockaddr *,
struct sctphdr *, struct sctp_inpcb **, struct sctp_nets **, uint32_t vrf_id);
int sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id);
int sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id);
void sctp_inpcb_free(struct sctp_inpcb *, int, int);
struct sctp_tcb *
sctp_aloc_assoc(struct sctp_inpcb *, struct sockaddr *,
int *, uint32_t, uint32_t, uint16_t, struct thread *);
int sctp_free_assoc(struct sctp_inpcb *, struct sctp_tcb *, int, int);
void sctp_delete_from_timewait(uint32_t, uint16_t, uint16_t);
int sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport);
void
sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport);
void sctp_add_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *, uint32_t);
int sctp_insert_laddr(struct sctpladdr *, struct sctp_ifa *, uint32_t);
void sctp_remove_laddr(struct sctp_laddr *);
void sctp_del_local_addr_ep(struct sctp_inpcb *, struct sctp_ifa *);
int sctp_add_remote_addr(struct sctp_tcb *, struct sockaddr *, struct sctp_nets **, int, int);
void sctp_remove_net(struct sctp_tcb *, struct sctp_nets *);
int sctp_del_remote_addr(struct sctp_tcb *, struct sockaddr *);
void sctp_pcb_init(void);
void sctp_pcb_finish(void);
void sctp_add_local_addr_restricted(struct sctp_tcb *, struct sctp_ifa *);
void sctp_del_local_addr_restricted(struct sctp_tcb *, struct sctp_ifa *);
int
sctp_load_addresses_from_init(struct sctp_tcb *, struct mbuf *, int, int,
struct sockaddr *, struct sockaddr *, struct sockaddr *);
int
sctp_set_primary_addr(struct sctp_tcb *, struct sockaddr *,
struct sctp_nets *);
int sctp_is_vtag_good(uint32_t, uint16_t lport, uint16_t rport, struct timeval *);
/* void sctp_drain(void); */
int sctp_destination_is_reachable(struct sctp_tcb *, struct sockaddr *);
int sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp);
/*-
* Null in last arg inpcb indicate run on ALL ep's. Specific inp in last arg
* indicates run on ONLY assoc's of the specified endpoint.
*/
int
sctp_initiate_iterator(inp_func inpf,
asoc_func af,
inp_func inpe,
uint32_t, uint32_t,
uint32_t, void *,
uint32_t,
end_func ef,
struct sctp_inpcb *,
uint8_t co_off);
#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
void
sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use);
#endif
-#ifdef INVARIANTS
-void
- sctp_validate_no_locks(struct sctp_inpcb *inp);
-
-#endif
-
#endif /* _KERNEL */
#endif /* !__sctp_pcb_h__ */
Index: stable/10
===================================================================
--- stable/10 (revision 294215)
+++ stable/10 (revision 294216)
Property changes on: stable/10
___________________________________________________________________
Modified: svn:mergeinfo
## -0,0 +0,1 ##
Merged /head:r292060

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