diff options
Diffstat (limited to 'res/res_pjsip_sdp_rtp.c')
-rw-r--r-- | res/res_pjsip_sdp_rtp.c | 89 |
1 files changed, 84 insertions, 5 deletions
diff --git a/res/res_pjsip_sdp_rtp.c b/res/res_pjsip_sdp_rtp.c index b27050ed8..d44171cf8 100644 --- a/res/res_pjsip_sdp_rtp.c +++ b/res/res_pjsip_sdp_rtp.c @@ -169,6 +169,23 @@ static int rtp_check_timeout(const void *data) return 0; } +/*! + * \brief Enable RTCP on an RTP session. + */ +static void enable_rtcp(struct ast_sip_session *session, struct ast_sip_session_media *session_media, + const struct pjmedia_sdp_media *remote_media) +{ + enum ast_rtp_instance_rtcp rtcp_type; + + if (session->endpoint->rtcp_mux && session_media->remote_rtcp_mux) { + rtcp_type = AST_RTP_INSTANCE_RTCP_MUX; + } else { + rtcp_type = AST_RTP_INSTANCE_RTCP_STANDARD; + } + + ast_rtp_instance_set_prop(session_media->rtp, AST_RTP_PROPERTY_RTCP, rtcp_type); +} + /*! \brief Internal function which creates an RTP instance */ static int create_rtp(struct ast_sip_session *session, struct ast_sip_session_media *session_media) { @@ -179,6 +196,20 @@ static int create_rtp(struct ast_sip_session *session, struct ast_sip_session_me if (session->endpoint->media.bind_rtp_to_media_address && !ast_strlen_zero(session->endpoint->media.address)) { ast_sockaddr_parse(&temp_media_address, session->endpoint->media.address, 0); media_address = &temp_media_address; + } else { + struct ast_sip_transport *transport = + ast_sorcery_retrieve_by_id(ast_sip_get_sorcery(), "transport", + session->endpoint->transport); + + if (transport && transport->state) { + char hoststr[PJ_INET6_ADDRSTRLEN]; + + pj_sockaddr_print(&transport->state->host, hoststr, sizeof(hoststr), 0); + ast_debug(1, "Transport: %s bound to host: %s, using this for media.\n", + session->endpoint->transport, hoststr); + ast_sockaddr_parse(media_address, hoststr, 0); + } + ao2_cleanup(transport); } if (!(session_media->rtp = ast_rtp_instance_new(session->endpoint->media.rtp.engine, sched, media_address, NULL))) { @@ -186,7 +217,6 @@ static int create_rtp(struct ast_sip_session *session, struct ast_sip_session_me return -1; } - ast_rtp_instance_set_prop(session_media->rtp, AST_RTP_PROPERTY_RTCP, 1); ast_rtp_instance_set_prop(session_media->rtp, AST_RTP_PROPERTY_NAT, session->endpoint->media.rtp.symmetric); if (!session->endpoint->media.rtp.ice_support && (ice = ast_rtp_instance_get_ice(session_media->rtp))) { @@ -201,7 +231,7 @@ static int create_rtp(struct ast_sip_session *session, struct ast_sip_session_me } if (!strcmp(session_media->stream_type, STR_AUDIO) && - (session->endpoint->media.tos_audio || session->endpoint->media.cos_video)) { + (session->endpoint->media.tos_audio || session->endpoint->media.cos_audio)) { ast_rtp_instance_set_qos(session_media->rtp, session->endpoint->media.tos_audio, session->endpoint->media.cos_audio, "SIP RTP Audio"); } else if (!strcmp(session_media->stream_type, STR_VIDEO) && @@ -555,6 +585,13 @@ static void process_ice_attributes(struct ast_sip_session *session, struct ast_s continue; } + if (session->endpoint->rtcp_mux && session_media->remote_rtcp_mux && candidate.id > 1) { + /* Remote side may have offered RTP and RTCP candidates. However, if we're using RTCP MUX, + * then we should ignore RTCP candidates. + */ + continue; + } + candidate.foundation = foundation; candidate.transport = transport; @@ -851,6 +888,26 @@ static int setup_media_encryption(struct ast_sip_session *session, return 0; } +static void set_ice_components(struct ast_sip_session *session, struct ast_sip_session_media *session_media) +{ + struct ast_rtp_engine_ice *ice; + + ast_assert(session_media->rtp != NULL); + + ice = ast_rtp_instance_get_ice(session_media->rtp); + if (!session->endpoint->media.rtp.ice_support || !ice) { + return; + } + + if (session->endpoint->rtcp_mux && session_media->remote_rtcp_mux) { + /* We both support RTCP mux. Only one ICE component necessary */ + ice->change_components(session_media->rtp, 1); + } else { + /* They either don't support RTCP mux or we don't know if they do yet. */ + ice->change_components(session_media->rtp, 2); + } +} + /*! \brief Function which negotiates an incoming media stream */ static int negotiate_incoming_sdp_stream(struct ast_sip_session *session, struct ast_sip_session_media *session_media, const struct pjmedia_sdp_session *sdp, const struct pjmedia_sdp_media *stream) @@ -895,6 +952,11 @@ static int negotiate_incoming_sdp_stream(struct ast_sip_session *session, struct return -1; } + session_media->remote_rtcp_mux = (pjmedia_sdp_media_find_attr2(stream, "rtcp-mux", NULL) != NULL); + set_ice_components(session, session_media); + + enable_rtcp(session, session_media, stream); + res = setup_media_encryption(session, session_media, sdp, stream); if (res) { if (!session->endpoint->media.rtp.encryption_optimistic || @@ -1065,6 +1127,9 @@ static int create_outgoing_sdp_stream(struct ast_sip_session *session, struct as return -1; } + set_ice_components(session, session_media); + enable_rtcp(session, session_media, NULL); + if (!(media = pj_pool_zalloc(pool, sizeof(struct pjmedia_sdp_media))) || !(media->conn = pj_pool_zalloc(pool, sizeof(struct pjmedia_sdp_conn)))) { return -1; @@ -1228,6 +1293,12 @@ static int create_outgoing_sdp_stream(struct ast_sip_session *session, struct as attr->name = STR_SENDRECV; media->attr[media->attr_count++] = attr; + /* If we've got rtcp-mux enabled, just unconditionally offer it in all SDPs */ + if (session->endpoint->rtcp_mux) { + attr = pjmedia_sdp_attr_create(pool, "rtcp-mux", NULL); + pjmedia_sdp_attr_add(&media->attr_count, media->attr, attr); + } + /* Add the media stream to the SDP */ sdp->media[sdp->media_count++] = media; @@ -1262,6 +1333,11 @@ static int apply_negotiated_sdp_stream(struct ast_sip_session *session, struct a return -1; } + session_media->remote_rtcp_mux = (pjmedia_sdp_media_find_attr2(remote_stream, "rtcp-mux", NULL) != NULL); + set_ice_components(session, session_media); + + enable_rtcp(session, session_media, remote_stream); + res = setup_media_encryption(session, session_media, remote, remote_stream); if (!session->endpoint->media.rtp.encryption_optimistic && res) { /* If optimistic encryption is disabled and crypto should have been enabled but was not @@ -1293,7 +1369,9 @@ static int apply_negotiated_sdp_stream(struct ast_sip_session *session, struct a return -1; } ast_channel_set_fd(session->channel, fdno, ast_rtp_instance_fd(session_media->rtp, 0)); - ast_channel_set_fd(session->channel, fdno + 1, ast_rtp_instance_fd(session_media->rtp, 1)); + if (!session->endpoint->rtcp_mux || !session_media->remote_rtcp_mux) { + ast_channel_set_fd(session->channel, fdno + 1, ast_rtp_instance_fd(session_media->rtp, 1)); + } /* If ICE support is enabled find all the needed attributes */ process_ice_attributes(session, session_media, remote, remote_stream); @@ -1387,10 +1465,11 @@ static void change_outgoing_sdp_stream_media_address(pjsip_tx_data *tdata, struc ast_sockaddr_parse(&addr, host, PARSE_PORT_FORBID); /* Is the address within the SDP inside the same network? */ - if (ast_apply_ha(transport_state->localnet, &addr) == AST_SENSE_ALLOW) { + if (transport_state->localnet + && ast_apply_ha(transport_state->localnet, &addr) == AST_SENSE_ALLOW) { return; } - + ast_debug(5, "Setting media address to %s\n", transport->external_media_address); pj_strdup2(tdata->pool, &stream->conn->addr, transport->external_media_address); } |