diff --git a/net/libcoap/Makefile b/net/libcoap/Makefile
index faa994ad49ec..ea7de6e6b69d 100644
--- a/net/libcoap/Makefile
+++ b/net/libcoap/Makefile
@@ -1,38 +1,39 @@
 PORTNAME=	libcoap
 DISTVERSIONPREFIX=	v
-DISTVERSION=	4.3.0
+DISTVERSION=	4.3.1
 CATEGORIES=	net
 
 MAINTAINER=	tcberner@FreeBSD.org
 COMMENT=	C implementation of the Constrained Application Protocol
 WWW=		https://github.com/obgm/libcoap
 
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	a2x:textproc/asciidoc \
 		gsed:textproc/gsed
 LIB_DEPENDS=	libgnutls.so:security/gnutls
 
 USES=		autoreconf gmake libtool pkgconfig
 USE_GITHUB=	yes
 GH_ACCOUNT=	obgm
 
 GNU_CONFIGURE=	yes
 
 INSTALL_TARGET=	install-strip
 
 BINARY_ALIAS=	sed=gsed
 PORTSCOUT=	limit:^4\.
 
 PORTDOCS=	*
 
 OPTIONS_DEFINE=	DOCS DOXYGEN
 OPTIONS_DEFAULT=	DOXYGEN
 
 DOXYGEN_IMPLIES=	DOCS
 DOXYGEN_BUILD_DEPENDS=	doxygen:devel/doxygen \
 			dot:graphics/graphviz
 DOXYGEN_CONFIGURE_ENABLE=	doxygen
 
+CONFIGURE_ENV=ac_cv_path_SED=${LOCALBASE}/bin/gsed
 .include <bsd.port.mk>
diff --git a/net/libcoap/distinfo b/net/libcoap/distinfo
index 38141afec5f5..7199e3a4803a 100644
--- a/net/libcoap/distinfo
+++ b/net/libcoap/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1624736788
-SHA256 (obgm-libcoap-v4.3.0_GH0.tar.gz) = 1a195adacd6188d3b71c476e7b21706fef7f3663ab1fb138652e8da49a9ec556
-SIZE (obgm-libcoap-v4.3.0_GH0.tar.gz) = 495456
+TIMESTAMP = 1669214147
+SHA256 (obgm-libcoap-v4.3.1_GH0.tar.gz) = 074a71deca01e06d3acb00a1416d0fbeb87d130f40a3c0f6fda3a5c711855dca
+SIZE (obgm-libcoap-v4.3.1_GH0.tar.gz) = 521381
diff --git a/net/libcoap/files/patch-configure.ac b/net/libcoap/files/patch-configure.ac
index d0e3cbae92c5..031becf7991c 100644
--- a/net/libcoap/files/patch-configure.ac
+++ b/net/libcoap/files/patch-configure.ac
@@ -1,11 +1,11 @@
---- configure.ac.orig	2021-06-21 08:39:42 UTC
+--- configure.ac.orig	2022-09-02 11:42:24 UTC
 +++ configure.ac
-@@ -826,7 +826,7 @@ case $host in
+@@ -918,7 +918,7 @@ case $host in
      #AC_SUBST(OS_MACOS)
      ;;
  
 -    *-freebsd1*)
 +    *freebsd*)
      AC_MSG_RESULT([FreeBSD-1x])
      ADDITIONAL_CFLAGS="-D_GNU_SOURCE"
      ;;
diff --git a/net/libcoap/files/patch-doc_Makefile.am b/net/libcoap/files/patch-doc_Makefile.am
deleted file mode 100644
index 88c6d97839da..000000000000
--- a/net/libcoap/files/patch-doc_Makefile.am
+++ /dev/null
@@ -1,33 +0,0 @@
---- doc/Makefile.am.orig	2021-06-21 08:39:42 UTC
-+++ doc/Makefile.am
-@@ -112,8 +112,8 @@ man-page-build: upg-page-build man-page-start
- 	echo '    </tab>' >> $(top_builddir)/doc/insert_file ;\
- 	## Create and Update the DoxygenLayout.xml file
- 	$(DOXYGEN) -l ;\
--	$(SED) -i 's/<tab type="pages" visible="yes" /<tab type="pages" visible="no" /g' $(top_builddir)/doc/DoxygenLayout.xml ;\
--	$(SED) -i '/<tab type="examples" visible=.*/r insert_file' $(top_builddir)/doc/DoxygenLayout.xml ;\
-+	$(SED) -i '' 's/<tab type="pages" visible="yes" /<tab type="pages" visible="no" /g' $(top_builddir)/doc/DoxygenLayout.xml ;\
-+	$(SED) -i '' '/<tab type="examples" visible=.*/r insert_file' $(top_builddir)/doc/DoxygenLayout.xml ;\
- 	$(RM) $(top_builddir)/doc/insert_file ;\
- 	## Fix up man html files, fixing links, UC Name and Synopsis
- 	for FILE in $${MAN_FILES} ; do \
-@@ -121,8 +121,8 @@ man-page-build: upg-page-build man-page-start
- 		if [ -f $(top_builddir)/man/$${BASE}.html ]; then \
- 			cp -f $(top_builddir)/man/$${BASE}.html $(top_builddir)/doc/man_html/$${BASE}.html ;\
- 			## Correct case sensitive Name and Synopsis
--			$(SED) -i 's^<h2>Name</h2>^<h2>NAME</h2>^g' $(top_builddir)/doc/man_html/$${BASE}.html ;\
--			$(SED) -i 's^<h2>Synopsis</h2>^<h2>SYNOPSIS</h2>^g' $(top_builddir)/doc/man_html/$${BASE}.html ;\
-+			$(SED) -i '' 's^<h2>Name</h2>^<h2>NAME</h2>^g' $(top_builddir)/doc/man_html/$${BASE}.html ;\
-+			$(SED) -i '' 's^<h2>Synopsis</h2>^<h2>SYNOPSIS</h2>^g' $(top_builddir)/doc/man_html/$${BASE}.html ;\
- 		else \
- 			echo "ERROR: $(top_builddir)/man/$${BASE}.html not found!";\
- 			exit 1 ;\
-@@ -131,7 +131,7 @@ man-page-build: upg-page-build man-page-start
- 			EBASE=`basename $${ENTRY} | cut -d . -f1` ;\
- 			MANUAL=`egrep -B 1 "^====" $${ENTRY} | head -1` ;\
- 			SECTION=`echo $${MANUAL} | cut -d\( -f2 | cut -d\) -f1` ;\
--			$(SED) -i "s^<span class=\"strong\"><strong>$${EBASE}</strong></span>($${SECTION})^<a href=\"man_$${EBASE}.html\" target=\"_self\"><span class=\"strong\"><strong>$${EBASE}</strong></span>($${SECTION})</a>^g" $(top_builddir)/doc/man_html/$${BASE}.html ;\
-+			$(SED) -i '' "s^<span class=\"strong\"><strong>$${EBASE}</strong></span>($${SECTION})^<a href=\"man_$${EBASE}.html\" target=\"_self\"><span class=\"strong\"><strong>$${EBASE}</strong></span>($${SECTION})</a>^g" $(top_builddir)/doc/man_html/$${BASE}.html ;\
- 		done ;\
- 		echo "finalized addition $${BASE}.html" ;\
- 	done
diff --git a/net/libcoap/pkg-plist b/net/libcoap/pkg-plist
index ce0fcf5a1a8a..01764c2794e4 100644
--- a/net/libcoap/pkg-plist
+++ b/net/libcoap/pkg-plist
@@ -1,246 +1,261 @@
 bin/coap-client
 bin/coap-client-gnutls
 bin/coap-rd
 bin/coap-rd-gnutls
 bin/coap-server
 bin/coap-server-gnutls
-include/coap3/address.h
-include/coap3/async.h
 include/coap3/block.h
 include/coap3/coap.h
+include/coap3/coap_address.h
+include/coap3/coap_async.h
 include/coap3/coap_cache.h
 include/coap3/coap_debug.h
 include/coap3/coap_dtls.h
 include/coap3/coap_event.h
 include/coap3/coap_forward_decls.h
 include/coap3/coap_hashkey.h
 include/coap3/coap_io.h
 include/coap3/coap_mutex.h
+include/coap3/coap_option.h
 include/coap3/coap_prng.h
 include/coap3/coap_session.h
+include/coap3/coap_subscribe.h
 include/coap3/coap_time.h
 include/coap3/encode.h
 include/coap3/libcoap.h
 include/coap3/mem.h
 include/coap3/net.h
-include/coap3/option.h
 include/coap3/pdu.h
 include/coap3/resource.h
 include/coap3/str.h
-include/coap3/subscribe.h
 include/coap3/uri.h
 lib/libcoap-3-gnutls.a
 lib/libcoap-3-gnutls.so
 lib/libcoap-3-gnutls.so.3
 lib/libcoap-3-gnutls.so.3.0.0
 lib/libcoap-3.a
 lib/libcoap-3.so
 libdata/pkgconfig/libcoap-3-gnutls.pc
 libdata/pkgconfig/libcoap-3.pc
 man/man3/coap_add_attr.3.gz
 man/man3/coap_add_data.3.gz
 man/man3/coap_add_data_blocked_response.3.gz
 man/man3/coap_add_data_large_request.3.gz
 man/man3/coap_add_data_large_response.3.gz
 man/man3/coap_add_option.3.gz
 man/man3/coap_add_optlist_pdu.3.gz
 man/man3/coap_add_resource.3.gz
 man/man3/coap_add_token.3.gz
 man/man3/coap_async.3.gz
 man/man3/coap_async_get_app_data.3.gz
 man/man3/coap_async_is_supported.3.gz
 man/man3/coap_async_set_app_data.3.gz
 man/man3/coap_async_set_delay.3.gz
+man/man3/coap_async_trigger.3.gz
+man/man3/coap_attr_get_value.3.gz
 man/man3/coap_attribute.3.gz
 man/man3/coap_binary_equal.3.gz
 man/man3/coap_block.3.gz
 man/man3/coap_block_build_body.3.gz
 man/man3/coap_cache.3.gz
-man/man3/coap_cache_delete_key.3.gz
 man/man3/coap_cache_derive_key.3.gz
 man/man3/coap_cache_derive_key_w_ignore.3.gz
 man/man3/coap_cache_get_app_data.3.gz
 man/man3/coap_cache_get_by_key.3.gz
 man/man3/coap_cache_get_by_pdu.3.gz
 man/man3/coap_cache_get_pdu.3.gz
 man/man3/coap_cache_ignore_options.3.gz
 man/man3/coap_cache_set_app_data.3.gz
 man/man3/coap_cancel_observe.3.gz
 man/man3/coap_check_option.3.gz
 man/man3/coap_context.3.gz
 man/man3/coap_context_get_coap_fd.3.gz
 man/man3/coap_context_get_csm_timeout.3.gz
 man/man3/coap_context_get_max_handshake_sessions.3.gz
 man/man3/coap_context_get_max_idle_sessions.3.gz
 man/man3/coap_context_get_session_timeout.3.gz
 man/man3/coap_context_set_block_mode.3.gz
 man/man3/coap_context_set_csm_timeout.3.gz
 man/man3/coap_context_set_keepalive.3.gz
 man/man3/coap_context_set_max_handshake_sessions.3.gz
 man/man3/coap_context_set_max_idle_sessions.3.gz
 man/man3/coap_context_set_pki.3.gz
 man/man3/coap_context_set_pki_root_cas.3.gz
 man/man3/coap_context_set_psk2.3.gz
 man/man3/coap_context_set_session_timeout.3.gz
 man/man3/coap_debug_set_packet_loss.3.gz
 man/man3/coap_decode_var_bytes.3.gz
 man/man3/coap_decode_var_bytes8.3.gz
 man/man3/coap_delete_bin_const.3.gz
 man/man3/coap_delete_binary.3.gz
 man/man3/coap_delete_cache_entry.3.gz
+man/man3/coap_delete_cache_key.3.gz
 man/man3/coap_delete_optlist.3.gz
 man/man3/coap_delete_resource.3.gz
 man/man3/coap_delete_str_const.3.gz
 man/man3/coap_delete_string.3.gz
 man/man3/coap_dtls_cpsk_t.3.gz
 man/man3/coap_dtls_is_supported.3.gz
 man/man3/coap_dtls_pki_t.3.gz
 man/man3/coap_dtls_spsk_t.3.gz
 man/man3/coap_encode_var_safe.3.gz
 man/man3/coap_encode_var_safe8.3.gz
 man/man3/coap_encryption.3.gz
 man/man3/coap_endpoint_client.3.gz
 man/man3/coap_endpoint_server.3.gz
 man/man3/coap_endpoint_set_default_mtu.3.gz
 man/man3/coap_endpoint_str.3.gz
 man/man3/coap_find_async.3.gz
 man/man3/coap_find_attr.3.gz
 man/man3/coap_free_async.3.gz
 man/man3/coap_free_context.3.gz
 man/man3/coap_free_endpoint.3.gz
 man/man3/coap_get_data.3.gz
 man/man3/coap_get_data_large.3.gz
 man/man3/coap_get_log_level.3.gz
 man/man3/coap_get_tls_library_version.3.gz
+man/man3/coap_get_uri_path.3.gz
 man/man3/coap_handler.3.gz
 man/man3/coap_insert_optlist.3.gz
 man/man3/coap_io.3.gz
+man/man3/coap_io_can_exit.3.gz
 man/man3/coap_io_do_epoll.3.gz
 man/man3/coap_io_do_io.3.gz
 man/man3/coap_io_prepare_epoll.3.gz
 man/man3/coap_io_prepare_io.3.gz
 man/man3/coap_io_process.3.gz
 man/man3/coap_io_process_with_fds.3.gz
 man/man3/coap_join_mcast_group_intf.3.gz
 man/man3/coap_keepalive.3.gz
 man/man3/coap_log.3.gz
 man/man3/coap_logging.3.gz
 man/man3/coap_make_str_const.3.gz
+man/man3/coap_mcast_per_resource.3.gz
 man/man3/coap_new_bin_const.3.gz
 man/man3/coap_new_binary.3.gz
 man/man3/coap_new_cache_entry.3.gz
 man/man3/coap_new_client_session.3.gz
 man/man3/coap_new_client_session_pki.3.gz
 man/man3/coap_new_client_session_psk2.3.gz
 man/man3/coap_new_context.3.gz
 man/man3/coap_new_endpoint.3.gz
 man/man3/coap_new_optlist.3.gz
 man/man3/coap_new_pdu.3.gz
 man/man3/coap_new_str_const.3.gz
 man/man3/coap_new_string.3.gz
 man/man3/coap_observe.3.gz
 man/man3/coap_opt_length.3.gz
 man/man3/coap_opt_value.3.gz
 man/man3/coap_option_filter_clear.3.gz
 man/man3/coap_option_filter_get.3.gz
 man/man3/coap_option_filter_set.3.gz
 man/man3/coap_option_filter_unset.3.gz
 man/man3/coap_option_iterator_init.3.gz
 man/man3/coap_option_next.3.gz
+man/man3/coap_package_build.3.gz
 man/man3/coap_package_name.3.gz
 man/man3/coap_package_version.3.gz
 man/man3/coap_pdu_access.3.gz
 man/man3/coap_pdu_get_code.3.gz
 man/man3/coap_pdu_get_mid.3.gz
 man/man3/coap_pdu_get_token.3.gz
 man/man3/coap_pdu_get_type.3.gz
 man/man3/coap_pdu_init.3.gz
 man/man3/coap_pdu_set_code.3.gz
 man/man3/coap_pdu_set_mid.3.gz
 man/man3/coap_pdu_set_type.3.gz
 man/man3/coap_pdu_setup.3.gz
 man/man3/coap_recovery.3.gz
 man/man3/coap_register_async.3.gz
 man/man3/coap_register_event_handler.3.gz
-man/man3/coap_register_handler.3.gz
 man/man3/coap_register_nack_handler.3.gz
 man/man3/coap_register_ping_handler.3.gz
 man/man3/coap_register_pong_handler.3.gz
+man/man3/coap_register_request_handler.3.gz
 man/man3/coap_register_response_handler.3.gz
 man/man3/coap_resize_binary.3.gz
 man/man3/coap_resource.3.gz
 man/man3/coap_resource_get_uri_path.3.gz
 man/man3/coap_resource_get_userdata.3.gz
 man/man3/coap_resource_init.3.gz
 man/man3/coap_resource_notify_observers.3.gz
 man/man3/coap_resource_proxy_uri_init.3.gz
+man/man3/coap_resource_proxy_uri_init2.3.gz
 man/man3/coap_resource_release_userdata_handler.3.gz
 man/man3/coap_resource_set_get_observable.3.gz
 man/man3/coap_resource_set_mode.3.gz
 man/man3/coap_resource_set_userdata.3.gz
 man/man3/coap_resource_unknown_init.3.gz
+man/man3/coap_resource_unknown_init2.3.gz
 man/man3/coap_send.3.gz
 man/man3/coap_session.3.gz
 man/man3/coap_session_disconnected.3.gz
 man/man3/coap_session_get_ack_random_factor.3.gz
 man/man3/coap_session_get_ack_timeout.3.gz
 man/man3/coap_session_get_addr_local.3.gz
 man/man3/coap_session_get_addr_remote.3.gz
 man/man3/coap_session_get_app_data.3.gz
 man/man3/coap_session_get_context.3.gz
+man/man3/coap_session_get_default_leisure.3.gz
 man/man3/coap_session_get_ifindex.3.gz
 man/man3/coap_session_get_max_retransmit.3.gz
+man/man3/coap_session_get_nstart.3.gz
+man/man3/coap_session_get_probing_wait.3.gz
 man/man3/coap_session_get_proto.3.gz
 man/man3/coap_session_get_psk_hint.3.gz
 man/man3/coap_session_get_psk_key.3.gz
 man/man3/coap_session_get_state.3.gz
 man/man3/coap_session_get_tls.3.gz
 man/man3/coap_session_get_type.3.gz
 man/man3/coap_session_init_token.3.gz
 man/man3/coap_session_max_pdu_size.3.gz
 man/man3/coap_session_new_token.3.gz
 man/man3/coap_session_reference.3.gz
 man/man3/coap_session_release.3.gz
 man/man3/coap_session_set_ack_random_factor.3.gz
 man/man3/coap_session_set_ack_timeout.3.gz
 man/man3/coap_session_set_app_data.3.gz
+man/man3/coap_session_set_default_leisure.3.gz
 man/man3/coap_session_set_max_retransmit.3.gz
 man/man3/coap_session_set_mtu.3.gz
+man/man3/coap_session_set_no_observe_cancel.3.gz
+man/man3/coap_session_set_nstart.3.gz
+man/man3/coap_session_set_probing_wait.3.gz
 man/man3/coap_session_set_type_client.3.gz
 man/man3/coap_session_str.3.gz
 man/man3/coap_set_log_handler.3.gz
 man/man3/coap_set_log_level.3.gz
 man/man3/coap_set_show_pdu_output.3.gz
 man/man3/coap_show_pdu.3.gz
 man/man3/coap_show_tls_version.3.gz
 man/man3/coap_split_path.3.gz
 man/man3/coap_split_query.3.gz
 man/man3/coap_string.3.gz
 man/man3/coap_string_equal.3.gz
 man/man3/coap_string_tls_support.3.gz
 man/man3/coap_string_tls_version.3.gz
 man/man3/coap_tcp_is_supported.3.gz
 man/man3/coap_tls_is_supported.3.gz
 man/man3/coap_tls_library.3.gz
 man/man5/coap-client-gnutls.5.gz
 man/man5/coap-client-mbedtls.5.gz
 man/man5/coap-client-notls.5.gz
 man/man5/coap-client-openssl.5.gz
 man/man5/coap-client.5.gz
 man/man5/coap-rd-gnutls.5.gz
 man/man5/coap-rd-mbedtls.5.gz
 man/man5/coap-rd-notls.5.gz
 man/man5/coap-rd-openssl.5.gz
 man/man5/coap-rd.5.gz
 man/man5/coap-server-gnutls.5.gz
 man/man5/coap-server-mbedtls.5.gz
 man/man5/coap-server-notls.5.gz
 man/man5/coap-server-openssl.5.gz
 man/man5/coap-server.5.gz
 man/man7/coap.7.gz
 %%DATADIR%%/examples/COPYING
 %%DATADIR%%/examples/LICENSE
 %%DATADIR%%/examples/Makefile
 %%DATADIR%%/examples/README
 %%DATADIR%%/examples/coap-client.c
 %%DATADIR%%/examples/coap-server.c