PJ_DEF(pjmedia_sdp_attr*) pjmedia_sdp_media_find_attr2( const pjmedia_sdp_media *m, const char *name, const pj_str_t *fmt) { PJ_ASSERT_RETURN(m && name, NULL); return pjmedia_sdp_attr_find2(m->attr_count, m->attr, name, fmt); }
/*! \brief Function which processes ICE attributes in an audio stream */ static void process_ice_attributes(struct ast_sip_session *session, struct ast_sip_session_media *session_media, const struct pjmedia_sdp_session *remote, const struct pjmedia_sdp_media *remote_stream) { struct ast_rtp_engine_ice *ice; const pjmedia_sdp_attr *attr; char attr_value[256]; unsigned int attr_i; /* If ICE support is not enabled or available exit early */ if (!session->endpoint->media.rtp.ice_support || !(ice = ast_rtp_instance_get_ice(session_media->rtp))) { return; } attr = pjmedia_sdp_media_find_attr2(remote_stream, "ice-ufrag", NULL); if (!attr) { attr = pjmedia_sdp_attr_find2(remote->attr_count, remote->attr, "ice-ufrag", NULL); } if (attr) { ast_copy_pj_str(attr_value, (pj_str_t*)&attr->value, sizeof(attr_value)); ice->set_authentication(session_media->rtp, attr_value, NULL); } else { return; } attr = pjmedia_sdp_media_find_attr2(remote_stream, "ice-pwd", NULL); if (!attr) { attr = pjmedia_sdp_attr_find2(remote->attr_count, remote->attr, "ice-pwd", NULL); } if (attr) { ast_copy_pj_str(attr_value, (pj_str_t*)&attr->value, sizeof(attr_value)); ice->set_authentication(session_media->rtp, NULL, attr_value); } else { return; } if (pjmedia_sdp_media_find_attr2(remote_stream, "ice-lite", NULL)) { ice->ice_lite(session_media->rtp); } /* Find all of the candidates */ for (attr_i = 0; attr_i < remote_stream->attr_count; ++attr_i) { char foundation[32], transport[32], address[PJ_INET6_ADDRSTRLEN + 1], cand_type[6], relay_address[PJ_INET6_ADDRSTRLEN + 1] = ""; unsigned int port, relay_port = 0; struct ast_rtp_engine_ice_candidate candidate = { 0, }; attr = remote_stream->attr[attr_i]; /* If this is not a candidate line skip it */ if (pj_strcmp2(&attr->name, "candidate")) { continue; } ast_copy_pj_str(attr_value, (pj_str_t*)&attr->value, sizeof(attr_value)); if (sscanf(attr_value, "%31s %30u %31s %30u %46s %30u typ %5s %*s %23s %*s %30u", foundation, &candidate.id, transport, (unsigned *)&candidate.priority, address, &port, cand_type, relay_address, &relay_port) < 7) { /* Candidate did not parse properly */ continue; } candidate.foundation = foundation; candidate.transport = transport; ast_sockaddr_parse(&candidate.address, address, PARSE_PORT_FORBID); ast_sockaddr_set_port(&candidate.address, port); if (!strcasecmp(cand_type, "host")) { candidate.type = AST_RTP_ICE_CANDIDATE_TYPE_HOST; } else if (!strcasecmp(cand_type, "srflx")) { candidate.type = AST_RTP_ICE_CANDIDATE_TYPE_SRFLX; } else if (!strcasecmp(cand_type, "relay")) { candidate.type = AST_RTP_ICE_CANDIDATE_TYPE_RELAYED; } else { continue; } if (!ast_strlen_zero(relay_address)) { ast_sockaddr_parse(&candidate.relay_address, relay_address, PARSE_PORT_FORBID); } if (relay_port) { ast_sockaddr_set_port(&candidate.relay_address, relay_port); } ice->add_remote_candidate(session_media->rtp, &candidate); } ice->set_role(session_media->rtp, pjmedia_sdp_neg_was_answer_remote(session->inv_session->neg) == PJ_TRUE ? AST_RTP_ICE_ROLE_CONTROLLING : AST_RTP_ICE_ROLE_CONTROLLED); ice->start(session_media->rtp); }
/* * Create stream info from SDP media line. */ PJ_DEF(pj_status_t) pjmedia_stream_info_from_sdp( pjmedia_stream_info *si, pj_pool_t *pool, pjmedia_endpt *endpt, const pjmedia_sdp_session *local, const pjmedia_sdp_session *remote, unsigned stream_idx) { pjmedia_codec_mgr *mgr; const pjmedia_sdp_attr *attr; const pjmedia_sdp_media *local_m; const pjmedia_sdp_media *rem_m; const pjmedia_sdp_conn *local_conn; const pjmedia_sdp_conn *rem_conn; int rem_af, local_af; pj_sockaddr local_addr; pjmedia_sdp_rtpmap *rtpmap; unsigned i, pt, fmti; pj_status_t status; /* Validate arguments: */ PJ_ASSERT_RETURN(pool && si && local && remote, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < local->media_count, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < remote->media_count, PJ_EINVAL); /* Get codec manager. */ mgr = pjmedia_endpt_get_codec_mgr(endpt); /* Keep SDP shortcuts */ local_m = local->media[stream_idx]; rem_m = remote->media[stream_idx]; local_conn = local_m->conn ? local_m->conn : local->conn; if (local_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; rem_conn = rem_m->conn ? rem_m->conn : remote->conn; if (rem_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; /* Reset: */ pj_bzero(si, sizeof(*si)); #if PJMEDIA_HAS_RTCP_XR && PJMEDIA_STREAM_ENABLE_XR /* Set default RTCP XR enabled/disabled */ si->rtcp_xr_enabled = PJ_TRUE; #endif /* Media type: */ if (pj_stricmp(&local_m->desc.media, &ID_AUDIO) == 0) { si->type = PJMEDIA_TYPE_AUDIO; } else if (pj_stricmp(&local_m->desc.media, &ID_VIDEO) == 0) { si->type = PJMEDIA_TYPE_VIDEO; } else { si->type = PJMEDIA_TYPE_UNKNOWN; /* Avoid rejecting call because of unrecognized media, * just return PJ_SUCCESS, this media will be deactivated later. */ //return PJMEDIA_EINVALIMEDIATYPE; return PJ_SUCCESS; } /* Transport protocol */ /* At this point, transport type must be compatible, * the transport instance will do more validation later. */ status = pjmedia_sdp_transport_cmp(&rem_m->desc.transport, &local_m->desc.transport); if (status != PJ_SUCCESS) return PJMEDIA_SDPNEG_EINVANSTP; if (pj_stricmp(&local_m->desc.transport, &ID_RTP_AVP) == 0) { si->proto = PJMEDIA_TP_PROTO_RTP_AVP; } else if (pj_stricmp(&local_m->desc.transport, &ID_RTP_SAVP) == 0) { si->proto = PJMEDIA_TP_PROTO_RTP_SAVP; } else { si->proto = PJMEDIA_TP_PROTO_UNKNOWN; return PJ_SUCCESS; } /* Check address family in remote SDP */ rem_af = pj_AF_UNSPEC(); if (pj_stricmp(&rem_conn->net_type, &ID_IN)==0) { if (pj_stricmp(&rem_conn->addr_type, &ID_IP4)==0) { rem_af = pj_AF_INET(); } else if (pj_stricmp(&rem_conn->addr_type, &ID_IP6)==0) { rem_af = pj_AF_INET6(); } } if (rem_af==pj_AF_UNSPEC()) { /* Unsupported address family */ return PJ_EAFNOTSUP; } /* Set remote address: */ status = pj_sockaddr_init(rem_af, &si->rem_addr, &rem_conn->addr, rem_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* Check address family of local info */ local_af = pj_AF_UNSPEC(); if (pj_stricmp(&local_conn->net_type, &ID_IN)==0) { if (pj_stricmp(&local_conn->addr_type, &ID_IP4)==0) { local_af = pj_AF_INET(); } else if (pj_stricmp(&local_conn->addr_type, &ID_IP6)==0) { local_af = pj_AF_INET6(); } } if (local_af==pj_AF_UNSPEC()) { /* Unsupported address family */ return PJ_SUCCESS; } /* Set remote address: */ status = pj_sockaddr_init(local_af, &local_addr, &local_conn->addr, local_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* Local and remote address family must match */ if (local_af != rem_af) return PJ_EAFNOTSUP; /* Media direction: */ if (local_m->desc.port == 0 || pj_sockaddr_has_addr(&local_addr)==PJ_FALSE || pj_sockaddr_has_addr(&si->rem_addr)==PJ_FALSE || pjmedia_sdp_media_find_attr(local_m, &STR_INACTIVE, NULL)!=NULL) { /* Inactive stream. */ si->dir = PJMEDIA_DIR_NONE; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_SENDONLY, NULL)!=NULL) { /* Send only stream. */ si->dir = PJMEDIA_DIR_ENCODING; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_RECVONLY, NULL)!=NULL) { /* Recv only stream. */ si->dir = PJMEDIA_DIR_DECODING; } else { /* Send and receive stream. */ si->dir = PJMEDIA_DIR_ENCODING_DECODING; } /* No need to do anything else if stream is rejected */ if (local_m->desc.port == 0) { return PJ_SUCCESS; } /* If "rtcp" attribute is present in the SDP, set the RTCP address * from that attribute. Otherwise, calculate from RTP address. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "rtcp", NULL); if (attr) { pjmedia_sdp_rtcp_attr rtcp; status = pjmedia_sdp_attr_get_rtcp(attr, &rtcp); if (status == PJ_SUCCESS) { if (rtcp.addr.slen) { status = pj_sockaddr_init(rem_af, &si->rem_rtcp, &rtcp.addr, (pj_uint16_t)rtcp.port); } else { pj_sockaddr_init(rem_af, &si->rem_rtcp, NULL, (pj_uint16_t)rtcp.port); pj_memcpy(pj_sockaddr_get_addr(&si->rem_rtcp), pj_sockaddr_get_addr(&si->rem_addr), pj_sockaddr_get_addr_len(&si->rem_addr)); } } } if (!pj_sockaddr_has_addr(&si->rem_rtcp)) { int rtcp_port; pj_memcpy(&si->rem_rtcp, &si->rem_addr, sizeof(pj_sockaddr)); rtcp_port = pj_sockaddr_get_port(&si->rem_addr) + 1; pj_sockaddr_set_port(&si->rem_rtcp, (pj_uint16_t)rtcp_port); } /* Get the payload number for receive channel. */ /* Previously we used to rely on fmt[0] being the selected codec, but some UA sends telephone-event as fmt[0] and this would cause assert failure below. Thanks Chris Hamilton <chamilton .at. cs.dal.ca> for this patch. // And codec must be numeric! if (!pj_isdigit(*local_m->desc.fmt[0].ptr) || !pj_isdigit(*rem_m->desc.fmt[0].ptr)) { return PJMEDIA_EINVALIDPT; } pt = pj_strtoul(&local_m->desc.fmt[0]); pj_assert(PJMEDIA_RTP_PT_TELEPHONE_EVENTS==0 || pt != PJMEDIA_RTP_PT_TELEPHONE_EVENTS); */ /* This is to suppress MSVC warning about uninitialized var */ pt = 0; /* Find the first codec which is not telephone-event */ for ( fmti = 0; fmti < local_m->desc.fmt_count; ++fmti ) { if ( !pj_isdigit(*local_m->desc.fmt[fmti].ptr) ) return PJMEDIA_EINVALIDPT; pt = pj_strtoul(&local_m->desc.fmt[fmti]); if ( PJMEDIA_RTP_PT_TELEPHONE_EVENTS == 0 || pt != PJMEDIA_RTP_PT_TELEPHONE_EVENTS ) break; } if ( fmti >= local_m->desc.fmt_count ) return PJMEDIA_EINVALIDPT; /* Get codec info. * For static payload types, get the info from codec manager. * For dynamic payload types, MUST get the rtpmap. */ if (pt < 96) { pj_bool_t has_rtpmap; rtpmap = NULL; has_rtpmap = PJ_TRUE; attr = pjmedia_sdp_media_find_attr(local_m, &ID_RTPMAP, &local_m->desc.fmt[fmti]); if (attr == NULL) { has_rtpmap = PJ_FALSE; } if (attr != NULL) { status = pjmedia_sdp_attr_to_rtpmap(pool, attr, &rtpmap); if (status != PJ_SUCCESS) has_rtpmap = PJ_FALSE; } /* Build codec format info: */ if (has_rtpmap) { si->fmt.type = si->type; si->fmt.pt = pj_strtoul(&local_m->desc.fmt[fmti]); pj_strdup(pool, &si->fmt.encoding_name, &rtpmap->enc_name); si->fmt.clock_rate = rtpmap->clock_rate; #if defined(PJMEDIA_HANDLE_G722_MPEG_BUG) && (PJMEDIA_HANDLE_G722_MPEG_BUG != 0) /* The session info should have the actual clock rate, because * this info is used for calculationg buffer size, etc in stream */ if (si->fmt.pt == PJMEDIA_RTP_PT_G722) si->fmt.clock_rate = 16000; #endif /* For audio codecs, rtpmap parameters denotes the number of * channels. */ if (si->type == PJMEDIA_TYPE_AUDIO && rtpmap->param.slen) { si->fmt.channel_cnt = (unsigned) pj_strtoul(&rtpmap->param); } else { si->fmt.channel_cnt = 1; } } else { const pjmedia_codec_info *p_info; status = pjmedia_codec_mgr_get_codec_info( mgr, pt, &p_info); if (status != PJ_SUCCESS) return status; pj_memcpy(&si->fmt, p_info, sizeof(pjmedia_codec_info)); } /* For static payload type, pt's are symetric */ si->tx_pt = pt; } else { attr = pjmedia_sdp_media_find_attr(local_m, &ID_RTPMAP, &local_m->desc.fmt[fmti]); if (attr == NULL) return PJMEDIA_EMISSINGRTPMAP; status = pjmedia_sdp_attr_to_rtpmap(pool, attr, &rtpmap); if (status != PJ_SUCCESS) return status; /* Build codec format info: */ si->fmt.type = si->type; si->fmt.pt = pj_strtoul(&local_m->desc.fmt[fmti]); pj_strdup(pool, &si->fmt.encoding_name, &rtpmap->enc_name); si->fmt.clock_rate = rtpmap->clock_rate; /* For audio codecs, rtpmap parameters denotes the number of * channels. */ if (si->type == PJMEDIA_TYPE_AUDIO && rtpmap->param.slen) { si->fmt.channel_cnt = (unsigned) pj_strtoul(&rtpmap->param); } else { si->fmt.channel_cnt = 1; } /* Determine payload type for outgoing channel, by finding * dynamic payload type in remote SDP that matches the answer. */ si->tx_pt = 0xFFFF; for (i=0; i<rem_m->desc.fmt_count; ++i) { unsigned rpt; pjmedia_sdp_attr *r_attr; pjmedia_sdp_rtpmap r_rtpmap; rpt = pj_strtoul(&rem_m->desc.fmt[i]); if (rpt < 96) continue; r_attr = pjmedia_sdp_media_find_attr(rem_m, &ID_RTPMAP, &rem_m->desc.fmt[i]); if (!r_attr) continue; if (pjmedia_sdp_attr_get_rtpmap(r_attr, &r_rtpmap) != PJ_SUCCESS) continue; if (!pj_stricmp(&rtpmap->enc_name, &r_rtpmap.enc_name) && rtpmap->clock_rate == r_rtpmap.clock_rate) { /* Found matched codec. */ si->tx_pt = rpt; break; } } if (si->tx_pt == 0xFFFF) return PJMEDIA_EMISSINGRTPMAP; } /* Now that we have codec info, get the codec param. */ si->param = PJ_POOL_ALLOC_T(pool, pjmedia_codec_param); status = pjmedia_codec_mgr_get_default_param(mgr, &si->fmt, si->param); /* Get remote fmtp for our encoder. */ parse_fmtp(pool, rem_m, si->tx_pt, &si->param->setting.enc_fmtp); /* Get local fmtp for our decoder. */ parse_fmtp(pool, local_m, si->fmt.pt, &si->param->setting.dec_fmtp); /* Get remote maxptime for our encoder. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "maxptime", NULL); if (attr) { pj_str_t tmp_val = attr->value; pj_strltrim(&tmp_val); si->tx_maxptime = pj_strtoul(&tmp_val); } /* When direction is NONE (it means SDP negotiation has failed) we don't * need to return a failure here, as returning failure will cause * the whole SDP to be rejected. See ticket #: * http:// * * Thanks Alain Totouom */ if (status != PJ_SUCCESS && si->dir != PJMEDIA_DIR_NONE) return status; /* Get incomming payload type for telephone-events */ si->rx_event_pt = -1; for (i=0; i<local_m->attr_count; ++i) { pjmedia_sdp_rtpmap r; attr = local_m->attr[i]; if (pj_strcmp(&attr->name, &ID_RTPMAP) != 0) continue; if (pjmedia_sdp_attr_get_rtpmap(attr, &r) != PJ_SUCCESS) continue; if (pj_strcmp(&r.enc_name, &ID_TELEPHONE_EVENT) == 0) { si->rx_event_pt = pj_strtoul(&r.pt); break; } } /* Get outgoing payload type for telephone-events */ si->tx_event_pt = -1; for (i=0; i<rem_m->attr_count; ++i) { pjmedia_sdp_rtpmap r; attr = rem_m->attr[i]; if (pj_strcmp(&attr->name, &ID_RTPMAP) != 0) continue; if (pjmedia_sdp_attr_get_rtpmap(attr, &r) != PJ_SUCCESS) continue; if (pj_strcmp(&r.enc_name, &ID_TELEPHONE_EVENT) == 0) { si->tx_event_pt = pj_strtoul(&r.pt); break; } } /* Leave SSRC to random. */ si->ssrc = pj_rand(); /* Set default jitter buffer parameter. */ si->jb_init = si->jb_max = si->jb_min_pre = si->jb_max_pre = -1; return PJ_SUCCESS; }
/* * Internal function for collecting codec info and param from the SDP media. */ static pj_status_t get_audio_codec_info_param(pjmedia_stream_info *si, pj_pool_t *pool, pjmedia_codec_mgr *mgr, const pjmedia_sdp_media *local_m, const pjmedia_sdp_media *rem_m) { const pjmedia_sdp_attr *attr; pjmedia_sdp_rtpmap *rtpmap; unsigned i, fmti, pt = 0; pj_status_t status; /* Find the first codec which is not telephone-event */ for ( fmti = 0; fmti < local_m->desc.fmt_count; ++fmti ) { pjmedia_sdp_rtpmap r; if ( !pj_isdigit(*local_m->desc.fmt[fmti].ptr) ) return PJMEDIA_EINVALIDPT; pt = pj_strtoul(&local_m->desc.fmt[fmti]); if (pt < 96) { /* This is known static PT. Skip rtpmap checking because it is * optional. */ break; } attr = pjmedia_sdp_media_find_attr(local_m, &ID_RTPMAP, &local_m->desc.fmt[fmti]); if (attr == NULL) continue; status = pjmedia_sdp_attr_get_rtpmap(attr, &r); if (status != PJ_SUCCESS) continue; if (pj_strcmp(&r.enc_name, &ID_TELEPHONE_EVENT) != 0) break; } if ( fmti >= local_m->desc.fmt_count ) return PJMEDIA_EINVALIDPT; /* Get payload type for receiving direction */ si->rx_pt = pt; /* Get codec info. * For static payload types, get the info from codec manager. * For dynamic payload types, MUST get the rtpmap. */ if (pt < 96) { pj_bool_t has_rtpmap; rtpmap = NULL; has_rtpmap = PJ_TRUE; attr = pjmedia_sdp_media_find_attr(local_m, &ID_RTPMAP, &local_m->desc.fmt[fmti]); if (attr == NULL) { has_rtpmap = PJ_FALSE; } if (attr != NULL) { status = pjmedia_sdp_attr_to_rtpmap(pool, attr, &rtpmap); if (status != PJ_SUCCESS) has_rtpmap = PJ_FALSE; } /* Build codec format info: */ if (has_rtpmap) { si->fmt.type = si->type; si->fmt.pt = pj_strtoul(&local_m->desc.fmt[fmti]); pj_strdup(pool, &si->fmt.encoding_name, &rtpmap->enc_name); si->fmt.clock_rate = rtpmap->clock_rate; #if defined(PJMEDIA_HANDLE_G722_MPEG_BUG) && (PJMEDIA_HANDLE_G722_MPEG_BUG != 0) /* The session info should have the actual clock rate, because * this info is used for calculationg buffer size, etc in stream */ if (si->fmt.pt == PJMEDIA_RTP_PT_G722) si->fmt.clock_rate = 16000; #endif /* For audio codecs, rtpmap parameters denotes the number of * channels. */ if (si->type == PJMEDIA_TYPE_AUDIO && rtpmap->param.slen) { si->fmt.channel_cnt = (unsigned) pj_strtoul(&rtpmap->param); } else { si->fmt.channel_cnt = 1; } } else { const pjmedia_codec_info *p_info; status = pjmedia_codec_mgr_get_codec_info( mgr, pt, &p_info); if (status != PJ_SUCCESS) return status; pj_memcpy(&si->fmt, p_info, sizeof(pjmedia_codec_info)); } /* For static payload type, pt's are symetric */ si->tx_pt = pt; } else { pjmedia_codec_id codec_id; pj_str_t codec_id_st; const pjmedia_codec_info *p_info; attr = pjmedia_sdp_media_find_attr(local_m, &ID_RTPMAP, &local_m->desc.fmt[fmti]); if (attr == NULL) return PJMEDIA_EMISSINGRTPMAP; status = pjmedia_sdp_attr_to_rtpmap(pool, attr, &rtpmap); if (status != PJ_SUCCESS) return status; /* Build codec format info: */ si->fmt.type = si->type; si->fmt.pt = pj_strtoul(&local_m->desc.fmt[fmti]); si->fmt.encoding_name = rtpmap->enc_name; si->fmt.clock_rate = rtpmap->clock_rate; /* For audio codecs, rtpmap parameters denotes the number of * channels. */ if (si->type == PJMEDIA_TYPE_AUDIO && rtpmap->param.slen) { si->fmt.channel_cnt = (unsigned) pj_strtoul(&rtpmap->param); } else { si->fmt.channel_cnt = 1; } /* Normalize the codec info from codec manager. Note that the * payload type will be resetted to its default (it might have * been rewritten by the SDP negotiator to match to the remote * offer), this is intentional as currently some components may * prefer (or even require) the default PT in codec info. */ pjmedia_codec_info_to_id(&si->fmt, codec_id, sizeof(codec_id)); i = 1; codec_id_st = pj_str(codec_id); status = pjmedia_codec_mgr_find_codecs_by_id(mgr, &codec_id_st, &i, &p_info, NULL); if (status != PJ_SUCCESS) return status; pj_memcpy(&si->fmt, p_info, sizeof(pjmedia_codec_info)); /* Determine payload type for outgoing channel, by finding * dynamic payload type in remote SDP that matches the answer. */ si->tx_pt = 0xFFFF; for (i=0; i<rem_m->desc.fmt_count; ++i) { if (pjmedia_sdp_neg_fmt_match(pool, (pjmedia_sdp_media*)local_m, fmti, (pjmedia_sdp_media*)rem_m, i, 0) == PJ_SUCCESS) { /* Found matched codec. */ si->tx_pt = pj_strtoul(&rem_m->desc.fmt[i]); break; } } if (si->tx_pt == 0xFFFF) return PJMEDIA_EMISSINGRTPMAP; } /* Now that we have codec info, get the codec param. */ si->param = PJ_POOL_ALLOC_T(pool, pjmedia_codec_param); status = pjmedia_codec_mgr_get_default_param(mgr, &si->fmt, si->param); /* Get remote fmtp for our encoder. */ pjmedia_stream_info_parse_fmtp(pool, rem_m, si->tx_pt, &si->param->setting.enc_fmtp); /* Get local fmtp for our decoder. */ pjmedia_stream_info_parse_fmtp(pool, local_m, si->rx_pt, &si->param->setting.dec_fmtp); if (!pj_stricmp2(&si->fmt.encoding_name, "opus")) { get_opus_channels_and_clock_rate(&si->param->setting.enc_fmtp, &si->param->setting.dec_fmtp, &si->fmt.channel_cnt, &si->fmt.clock_rate); } /* Get the remote ptime for our encoder. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "ptime", NULL); if (attr) { pj_str_t tmp_val = attr->value; unsigned frm_per_pkt; pj_strltrim(&tmp_val); /* Round up ptime when the specified is not multiple of frm_ptime */ frm_per_pkt = (pj_strtoul(&tmp_val) + si->param->info.frm_ptime/2) / si->param->info.frm_ptime; if (frm_per_pkt != 0) { si->param->setting.frm_per_pkt = (pj_uint8_t)frm_per_pkt; } } /* Get remote maxptime for our encoder. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "maxptime", NULL); if (attr) { pj_str_t tmp_val = attr->value; pj_strltrim(&tmp_val); si->tx_maxptime = pj_strtoul(&tmp_val); } /* When direction is NONE (it means SDP negotiation has failed) we don't * need to return a failure here, as returning failure will cause * the whole SDP to be rejected. See ticket #: * http:// * * Thanks Alain Totouom */ if (status != PJ_SUCCESS && si->dir != PJMEDIA_DIR_NONE) return status; /* Get incomming payload type for telephone-events */ si->rx_event_pt = -1; for (i=0; i<local_m->attr_count; ++i) { pjmedia_sdp_rtpmap r; attr = local_m->attr[i]; if (pj_strcmp(&attr->name, &ID_RTPMAP) != 0) continue; if (pjmedia_sdp_attr_get_rtpmap(attr, &r) != PJ_SUCCESS) continue; if (pj_strcmp(&r.enc_name, &ID_TELEPHONE_EVENT) == 0) { si->rx_event_pt = pj_strtoul(&r.pt); break; } } /* Get outgoing payload type for telephone-events */ si->tx_event_pt = -1; for (i=0; i<rem_m->attr_count; ++i) { pjmedia_sdp_rtpmap r; attr = rem_m->attr[i]; if (pj_strcmp(&attr->name, &ID_RTPMAP) != 0) continue; if (pjmedia_sdp_attr_get_rtpmap(attr, &r) != PJ_SUCCESS) continue; if (pj_strcmp(&r.enc_name, &ID_TELEPHONE_EVENT) == 0) { si->tx_event_pt = pj_strtoul(&r.pt); break; } } return PJ_SUCCESS; }
/* * Create stream info from SDP media line. */ PJ_DEF(pj_status_t) pjmedia_stream_info_from_sdp( pjmedia_stream_info *si, pj_pool_t *pool, pjmedia_endpt *endpt, const pjmedia_sdp_session *local, const pjmedia_sdp_session *remote, unsigned stream_idx) { const pj_str_t STR_INACTIVE = { "inactive", 8 }; const pj_str_t STR_SENDONLY = { "sendonly", 8 }; const pj_str_t STR_RECVONLY = { "recvonly", 8 }; pjmedia_codec_mgr *mgr; const pjmedia_sdp_attr *attr; const pjmedia_sdp_media *local_m; const pjmedia_sdp_media *rem_m; const pjmedia_sdp_conn *local_conn; const pjmedia_sdp_conn *rem_conn; int rem_af, local_af; pj_sockaddr local_addr; pj_status_t status; /* Validate arguments: */ PJ_ASSERT_RETURN(pool && si && local && remote, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < local->media_count, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < remote->media_count, PJ_EINVAL); /* Keep SDP shortcuts */ local_m = local->media[stream_idx]; rem_m = remote->media[stream_idx]; local_conn = local_m->conn ? local_m->conn : local->conn; if (local_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; rem_conn = rem_m->conn ? rem_m->conn : remote->conn; if (rem_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; /* Media type must be audio */ if (pj_stricmp(&local_m->desc.media, &ID_AUDIO) != 0) return PJMEDIA_EINVALIMEDIATYPE; /* Get codec manager. */ mgr = pjmedia_endpt_get_codec_mgr(endpt); /* Reset: */ pj_bzero(si, sizeof(*si)); #if PJMEDIA_HAS_RTCP_XR && PJMEDIA_STREAM_ENABLE_XR /* Set default RTCP XR enabled/disabled */ si->rtcp_xr_enabled = PJ_TRUE; #endif /* Media type: */ si->type = PJMEDIA_TYPE_AUDIO; /* Transport protocol */ /* At this point, transport type must be compatible, * the transport instance will do more validation later. */ status = pjmedia_sdp_transport_cmp(&rem_m->desc.transport, &local_m->desc.transport); if (status != PJ_SUCCESS) return PJMEDIA_SDPNEG_EINVANSTP; if (pj_stricmp(&local_m->desc.transport, &ID_RTP_AVP) == 0) { si->proto = PJMEDIA_TP_PROTO_RTP_AVP; } else if (pj_stricmp(&local_m->desc.transport, &ID_RTP_SAVP) == 0) { si->proto = PJMEDIA_TP_PROTO_RTP_SAVP; } else { si->proto = PJMEDIA_TP_PROTO_UNKNOWN; return PJ_SUCCESS; } /* Check address family in remote SDP */ rem_af = pj_AF_UNSPEC(); if (pj_stricmp(&rem_conn->net_type, &ID_IN)==0) { if (pj_stricmp(&rem_conn->addr_type, &ID_IP4)==0) { rem_af = pj_AF_INET(); } else if (pj_stricmp(&rem_conn->addr_type, &ID_IP6)==0) { rem_af = pj_AF_INET6(); } } if (rem_af==pj_AF_UNSPEC()) { /* Unsupported address family */ return PJ_EAFNOTSUP; } /* Set remote address: */ status = pj_sockaddr_init(rem_af, &si->rem_addr, &rem_conn->addr, rem_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* Check address family of local info */ local_af = pj_AF_UNSPEC(); if (pj_stricmp(&local_conn->net_type, &ID_IN)==0) { if (pj_stricmp(&local_conn->addr_type, &ID_IP4)==0) { local_af = pj_AF_INET(); } else if (pj_stricmp(&local_conn->addr_type, &ID_IP6)==0) { local_af = pj_AF_INET6(); } } if (local_af==pj_AF_UNSPEC()) { /* Unsupported address family */ return PJ_SUCCESS; } /* Set remote address: */ status = pj_sockaddr_init(local_af, &local_addr, &local_conn->addr, local_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* Local and remote address family must match */ if (local_af != rem_af) return PJ_EAFNOTSUP; /* Media direction: */ if (local_m->desc.port == 0 || pj_sockaddr_has_addr(&local_addr)==PJ_FALSE || pj_sockaddr_has_addr(&si->rem_addr)==PJ_FALSE || pjmedia_sdp_media_find_attr(local_m, &STR_INACTIVE, NULL)!=NULL) { /* Inactive stream. */ si->dir = PJMEDIA_DIR_NONE; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_SENDONLY, NULL)!=NULL) { /* Send only stream. */ si->dir = PJMEDIA_DIR_ENCODING; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_RECVONLY, NULL)!=NULL) { /* Recv only stream. */ si->dir = PJMEDIA_DIR_DECODING; } else { /* Send and receive stream. */ si->dir = PJMEDIA_DIR_ENCODING_DECODING; } /* No need to do anything else if stream is rejected */ if (local_m->desc.port == 0) { return PJ_SUCCESS; } /* If "rtcp" attribute is present in the SDP, set the RTCP address * from that attribute. Otherwise, calculate from RTP address. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "rtcp", NULL); if (attr) { pjmedia_sdp_rtcp_attr rtcp; status = pjmedia_sdp_attr_get_rtcp(attr, &rtcp); if (status == PJ_SUCCESS) { if (rtcp.addr.slen) { status = pj_sockaddr_init(rem_af, &si->rem_rtcp, &rtcp.addr, (pj_uint16_t)rtcp.port); } else { pj_sockaddr_init(rem_af, &si->rem_rtcp, NULL, (pj_uint16_t)rtcp.port); pj_memcpy(pj_sockaddr_get_addr(&si->rem_rtcp), pj_sockaddr_get_addr(&si->rem_addr), pj_sockaddr_get_addr_len(&si->rem_addr)); } } } if (!pj_sockaddr_has_addr(&si->rem_rtcp)) { int rtcp_port; pj_memcpy(&si->rem_rtcp, &si->rem_addr, sizeof(pj_sockaddr)); rtcp_port = pj_sockaddr_get_port(&si->rem_addr) + 1; pj_sockaddr_set_port(&si->rem_rtcp, (pj_uint16_t)rtcp_port); } /* Get the payload number for receive channel. */ /* Previously we used to rely on fmt[0] being the selected codec, but some UA sends telephone-event as fmt[0] and this would cause assert failure below. Thanks Chris Hamilton <chamilton .at. cs.dal.ca> for this patch. // And codec must be numeric! if (!pj_isdigit(*local_m->desc.fmt[0].ptr) || !pj_isdigit(*rem_m->desc.fmt[0].ptr)) { return PJMEDIA_EINVALIDPT; } pt = pj_strtoul(&local_m->desc.fmt[0]); pj_assert(PJMEDIA_RTP_PT_TELEPHONE_EVENTS==0 || pt != PJMEDIA_RTP_PT_TELEPHONE_EVENTS); */ /* Get codec info and param */ status = get_audio_codec_info_param(si, pool, mgr, local_m, rem_m); /* Leave SSRC to random. */ si->ssrc = pj_rand(); /* Set default jitter buffer parameter. */ si->jb_init = si->jb_max = si->jb_min_pre = si->jb_max_pre = -1; return status; }
/* * Create stream info from SDP media line. */ PJ_DEF(pj_status_t) pjmedia_stream_info_from_sdp( pjmedia_stream_info *si, pj_pool_t *pool, pjmedia_endpt *endpt, const pjmedia_sdp_session *local, const pjmedia_sdp_session *remote, unsigned stream_idx) { pjmedia_codec_mgr *mgr; const pjmedia_sdp_attr *attr; const pjmedia_sdp_media *local_m; const pjmedia_sdp_media *rem_m; const pjmedia_sdp_conn *local_conn; const pjmedia_sdp_conn *rem_conn; pjmedia_sdp_rtpmap *rtpmap; int local_fmtp_mode = 0, rem_fmtp_mode = 0; unsigned i, pt, fmti; pj_status_t status; /* Validate arguments: */ PJ_ASSERT_RETURN(pool && si && local && remote, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < local->media_count, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < remote->media_count, PJ_EINVAL); /* Get codec manager. */ mgr = pjmedia_endpt_get_codec_mgr(endpt); /* Keep SDP shortcuts */ local_m = local->media[stream_idx]; rem_m = remote->media[stream_idx]; local_conn = local_m->conn ? local_m->conn : local->conn; if (local_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; rem_conn = rem_m->conn ? rem_m->conn : remote->conn; if (rem_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; /* Reset: */ pj_bzero(si, sizeof(*si)); /* Media type: */ if (pj_stricmp(&local_m->desc.media, &ID_AUDIO) == 0) { si->type = PJMEDIA_TYPE_AUDIO; } else if (pj_stricmp(&local_m->desc.media, &ID_VIDEO) == 0) { si->type = PJMEDIA_TYPE_VIDEO; } else { si->type = PJMEDIA_TYPE_UNKNOWN; return PJMEDIA_EINVALIMEDIATYPE; } /* Transport type must be equal */ if (pj_stricmp(&rem_m->desc.transport, &local_m->desc.transport) != 0) { si->type = PJMEDIA_TYPE_UNKNOWN; return PJMEDIA_SDPNEG_EINVANSTP; } /* Media direction: */ if (local_m->desc.port == 0 || pj_inet_addr(&local_conn->addr).s_addr==0 || pj_inet_addr(&rem_conn->addr).s_addr==0 || pjmedia_sdp_media_find_attr(local_m, &STR_INACTIVE, NULL)!=NULL) { /* Inactive stream. */ si->dir = PJMEDIA_DIR_NONE; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_SENDONLY, NULL)!=NULL) { /* Send only stream. */ si->dir = PJMEDIA_DIR_ENCODING; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_RECVONLY, NULL)!=NULL) { /* Recv only stream. */ si->dir = PJMEDIA_DIR_DECODING; } else { /* Send and receive stream. */ si->dir = PJMEDIA_DIR_ENCODING_DECODING; } /* Set remote address: */ status = pj_sockaddr_in_init(&si->rem_addr, &rem_conn->addr, rem_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* If "rtcp" attribute is present in the SDP, set the RTCP address * from that attribute. Otherwise, calculate from RTP address. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "rtcp", NULL); if (attr) { pjmedia_sdp_rtcp_attr rtcp; status = pjmedia_sdp_attr_get_rtcp(attr, &rtcp); if (status == PJ_SUCCESS) { if (rtcp.addr.slen) { status = pj_sockaddr_in_init(&si->rem_rtcp, &rtcp.addr, (pj_uint16_t)rtcp.port); } else { pj_sockaddr_in_init(&si->rem_rtcp, NULL, (pj_uint16_t)rtcp.port); si->rem_rtcp.sin_addr.s_addr = si->rem_addr.sin_addr.s_addr; } } } if (si->rem_rtcp.sin_addr.s_addr == 0) { int rtcp_port; pj_memcpy(&si->rem_rtcp, &si->rem_addr, sizeof(pj_sockaddr_in)); rtcp_port = pj_ntohs(si->rem_addr.sin_port) + 1; si->rem_rtcp.sin_port = pj_htons((pj_uint16_t)rtcp_port); } /* Get the payload number for receive channel. */ /* Previously we used to rely on fmt[0] being the selected codec, but some UA sends telephone-event as fmt[0] and this would cause assert failure below. Thanks Chris Hamilton <chamilton .at. cs.dal.ca> for this patch. // And codec must be numeric! if (!pj_isdigit(*local_m->desc.fmt[0].ptr) || !pj_isdigit(*rem_m->desc.fmt[0].ptr)) { return PJMEDIA_EINVALIDPT; } pt = pj_strtoul(&local_m->desc.fmt[0]); pj_assert(PJMEDIA_RTP_PT_TELEPHONE_EVENTS==0 || pt != PJMEDIA_RTP_PT_TELEPHONE_EVENTS); */ /* This is to suppress MSVC warning about uninitialized var */ pt = 0; /* Find the first codec which is not telephone-event */ for ( fmti = 0; fmti < local_m->desc.fmt_count; ++fmti ) { if ( !pj_isdigit(*local_m->desc.fmt[fmti].ptr) ) return PJMEDIA_EINVALIDPT; pt = pj_strtoul(&local_m->desc.fmt[fmti]); if ( PJMEDIA_RTP_PT_TELEPHONE_EVENTS == 0 || pt != PJMEDIA_RTP_PT_TELEPHONE_EVENTS ) break; } if ( fmti >= local_m->desc.fmt_count ) return PJMEDIA_EINVALIDPT; /* Get codec info. * For static payload types, get the info from codec manager. * For dynamic payload types, MUST get the rtpmap. */ if (pt < 96) { pj_bool_t has_rtpmap; rtpmap = NULL; has_rtpmap = PJ_TRUE; attr = pjmedia_sdp_media_find_attr(local_m, &ID_RTPMAP, &local_m->desc.fmt[fmti]); if (attr == NULL) { has_rtpmap = PJ_FALSE; } if (attr != NULL) { status = pjmedia_sdp_attr_to_rtpmap(pool, attr, &rtpmap); if (status != PJ_SUCCESS) has_rtpmap = PJ_FALSE; } /* Build codec format info: */ if (has_rtpmap) { si->fmt.type = si->type; si->fmt.pt = pj_strtoul(&local_m->desc.fmt[fmti]); pj_strdup(pool, &si->fmt.encoding_name, &rtpmap->enc_name); si->fmt.clock_rate = rtpmap->clock_rate; /* For audio codecs, rtpmap parameters denotes the number of * channels. */ if (si->type == PJMEDIA_TYPE_AUDIO && rtpmap->param.slen) { if (rtpmap->param.slen == 2) { si->fmt.channel_cnt = rtpmap->param.ptr[1] - '0'; } else { pj_str_t cnt; cnt.ptr = rtpmap->param.ptr + 1; cnt.slen = rtpmap->param.slen - 1; si->fmt.channel_cnt = (unsigned) pj_strtoul(&cnt); } } else { si->fmt.channel_cnt = 1; } } else { const pjmedia_codec_info *p_info; status = pjmedia_codec_mgr_get_codec_info( mgr, pt, &p_info); if (status != PJ_SUCCESS) return status; pj_memcpy(&si->fmt, p_info, sizeof(pjmedia_codec_info)); } /* For static payload type, pt's are symetric */ si->tx_pt = pt; } else { attr = pjmedia_sdp_media_find_attr(local_m, &ID_RTPMAP, &local_m->desc.fmt[fmti]); if (attr == NULL) return PJMEDIA_EMISSINGRTPMAP; status = pjmedia_sdp_attr_to_rtpmap(pool, attr, &rtpmap); if (status != PJ_SUCCESS) return status; /* Build codec format info: */ si->fmt.type = si->type; si->fmt.pt = pj_strtoul(&local_m->desc.fmt[fmti]); pj_strdup(pool, &si->fmt.encoding_name, &rtpmap->enc_name); si->fmt.clock_rate = rtpmap->clock_rate; /* For audio codecs, rtpmap parameters denotes the number of * channels. */ if (si->type == PJMEDIA_TYPE_AUDIO && rtpmap->param.slen) { if (rtpmap->param.slen == 2) { si->fmt.channel_cnt = rtpmap->param.ptr[1] - '0'; } else { pj_str_t cnt; cnt.ptr = rtpmap->param.ptr + 1; cnt.slen = rtpmap->param.slen - 1; si->fmt.channel_cnt = (unsigned) pj_strtoul(&cnt); } } else { si->fmt.channel_cnt = 1; } /* Get fmtp mode= param in local SDP, if any */ get_fmtp_mode(local_m, &local_m->desc.fmt[fmti], &local_fmtp_mode); /* Determine payload type for outgoing channel, by finding * dynamic payload type in remote SDP that matches the answer. */ si->tx_pt = 0xFFFF; for (i=0; i<rem_m->desc.fmt_count; ++i) { unsigned rpt; pjmedia_sdp_attr *r_attr; pjmedia_sdp_rtpmap r_rtpmap; rpt = pj_strtoul(&rem_m->desc.fmt[i]); if (rpt < 96) continue; r_attr = pjmedia_sdp_media_find_attr(rem_m, &ID_RTPMAP, &rem_m->desc.fmt[i]); if (!r_attr) continue; if (pjmedia_sdp_attr_get_rtpmap(r_attr, &r_rtpmap) != PJ_SUCCESS) continue; if (!pj_stricmp(&rtpmap->enc_name, &r_rtpmap.enc_name) && rtpmap->clock_rate == r_rtpmap.clock_rate) { /* Found matched codec. */ si->tx_pt = rpt; /* Get fmtp mode param in remote SDP, if any */ get_fmtp_mode(rem_m, &rtpmap->pt, &rem_fmtp_mode); break; } } if (si->tx_pt == 0xFFFF) return PJMEDIA_EMISSINGRTPMAP; } /* Now that we have codec info, get the codec param. */ si->param = pj_pool_alloc(pool, sizeof(*si->param)); status = pjmedia_codec_mgr_get_default_param(mgr, &si->fmt, si->param); if (status != PJ_SUCCESS) return status; /* Set fmtp mode for both local and remote */ if (local_fmtp_mode != 0) si->param->setting.dec_fmtp_mode = (pj_int8_t)local_fmtp_mode; if (rem_fmtp_mode != 0) si->param->setting.enc_fmtp_mode = (pj_int8_t)rem_fmtp_mode; /* Get incomming payload type for telephone-events */ si->rx_event_pt = -1; for (i=0; i<local_m->attr_count; ++i) { pjmedia_sdp_rtpmap r; attr = local_m->attr[i]; if (pj_strcmp(&attr->name, &ID_RTPMAP) != 0) continue; if (pjmedia_sdp_attr_get_rtpmap(attr, &r) != PJ_SUCCESS) continue; if (pj_strcmp(&r.enc_name, &ID_TELEPHONE_EVENT) == 0) { si->rx_event_pt = pj_strtoul(&r.pt); break; } } /* Get outgoing payload type for telephone-events */ si->tx_event_pt = -1; for (i=0; i<rem_m->attr_count; ++i) { pjmedia_sdp_rtpmap r; attr = rem_m->attr[i]; if (pj_strcmp(&attr->name, &ID_RTPMAP) != 0) continue; if (pjmedia_sdp_attr_get_rtpmap(attr, &r) != PJ_SUCCESS) continue; if (pj_strcmp(&r.enc_name, &ID_TELEPHONE_EVENT) == 0) { si->tx_event_pt = pj_strtoul(&r.pt); break; } } /* Leave SSRC to random. */ si->ssrc = pj_rand(); /* Set default jitter buffer parameter. */ si->jb_init = si->jb_max = si->jb_min_pre = si->jb_max_pre = -1; return PJ_SUCCESS; }
/* * Create stream info from SDP media line. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_info_from_sdp( pjmedia_vid_stream_info *si, pj_pool_t *pool, pjmedia_endpt *endpt, const pjmedia_sdp_session *local, const pjmedia_sdp_session *remote, unsigned stream_idx) { const pjmedia_sdp_attr *attr; const pjmedia_sdp_media *local_m; const pjmedia_sdp_media *rem_m; const pjmedia_sdp_conn *local_conn; const pjmedia_sdp_conn *rem_conn; int rem_af, local_af; pj_sockaddr local_addr; pj_status_t status; PJ_UNUSED_ARG(endpt); /* Validate arguments: */ PJ_ASSERT_RETURN(pool && si && local && remote, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < local->media_count, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < remote->media_count, PJ_EINVAL); /* Keep SDP shortcuts */ local_m = local->media[stream_idx]; rem_m = remote->media[stream_idx]; local_conn = local_m->conn ? local_m->conn : local->conn; if (local_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; rem_conn = rem_m->conn ? rem_m->conn : remote->conn; if (rem_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; /* Media type must be video */ if (pj_stricmp(&local_m->desc.media, &ID_VIDEO) != 0) return PJMEDIA_EINVALIMEDIATYPE; /* Reset: */ pj_bzero(si, sizeof(*si)); /* Media type: */ si->type = PJMEDIA_TYPE_VIDEO; /* Transport protocol */ /* At this point, transport type must be compatible, * the transport instance will do more validation later. */ status = pjmedia_sdp_transport_cmp(&rem_m->desc.transport, &local_m->desc.transport); if (status != PJ_SUCCESS) return PJMEDIA_SDPNEG_EINVANSTP; if (pj_stricmp(&local_m->desc.transport, &ID_RTP_AVP) == 0) { si->proto = PJMEDIA_TP_PROTO_RTP_AVP; } else if (pj_stricmp(&local_m->desc.transport, &ID_RTP_SAVP) == 0) { si->proto = PJMEDIA_TP_PROTO_RTP_SAVP; } else { si->proto = PJMEDIA_TP_PROTO_UNKNOWN; return PJ_SUCCESS; } /* Check address family in remote SDP */ rem_af = pj_AF_UNSPEC(); if (pj_stricmp(&rem_conn->net_type, &ID_IN)==0) { if (pj_stricmp(&rem_conn->addr_type, &ID_IP4)==0) { rem_af = pj_AF_INET(); } else if (pj_stricmp(&rem_conn->addr_type, &ID_IP6)==0) { rem_af = pj_AF_INET6(); } } if (rem_af==pj_AF_UNSPEC()) { /* Unsupported address family */ return PJ_EAFNOTSUP; } /* Set remote address: */ status = pj_sockaddr_init(rem_af, &si->rem_addr, &rem_conn->addr, rem_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* Check address family of local info */ local_af = pj_AF_UNSPEC(); if (pj_stricmp(&local_conn->net_type, &ID_IN)==0) { if (pj_stricmp(&local_conn->addr_type, &ID_IP4)==0) { local_af = pj_AF_INET(); } else if (pj_stricmp(&local_conn->addr_type, &ID_IP6)==0) { local_af = pj_AF_INET6(); } } if (local_af==pj_AF_UNSPEC()) { /* Unsupported address family */ return PJ_SUCCESS; } /* Set remote address: */ status = pj_sockaddr_init(local_af, &local_addr, &local_conn->addr, local_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* Local and remote address family must match */ if (local_af != rem_af) return PJ_EAFNOTSUP; /* Media direction: */ if (local_m->desc.port == 0 || pj_sockaddr_has_addr(&local_addr)==PJ_FALSE || pj_sockaddr_has_addr(&si->rem_addr)==PJ_FALSE || pjmedia_sdp_media_find_attr(local_m, &STR_INACTIVE, NULL)!=NULL) { /* Inactive stream. */ si->dir = PJMEDIA_DIR_NONE; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_SENDONLY, NULL)!=NULL) { /* Send only stream. */ si->dir = PJMEDIA_DIR_ENCODING; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_RECVONLY, NULL)!=NULL) { /* Recv only stream. */ si->dir = PJMEDIA_DIR_DECODING; } else { /* Send and receive stream. */ si->dir = PJMEDIA_DIR_ENCODING_DECODING; } /* No need to do anything else if stream is rejected */ if (local_m->desc.port == 0) { return PJ_SUCCESS; } /* If "rtcp" attribute is present in the SDP, set the RTCP address * from that attribute. Otherwise, calculate from RTP address. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "rtcp", NULL); if (attr) { pjmedia_sdp_rtcp_attr rtcp; status = pjmedia_sdp_attr_get_rtcp(attr, &rtcp); if (status == PJ_SUCCESS) { if (rtcp.addr.slen) { status = pj_sockaddr_init(rem_af, &si->rem_rtcp, &rtcp.addr, (pj_uint16_t)rtcp.port); } else { pj_sockaddr_init(rem_af, &si->rem_rtcp, NULL, (pj_uint16_t)rtcp.port); pj_memcpy(pj_sockaddr_get_addr(&si->rem_rtcp), pj_sockaddr_get_addr(&si->rem_addr), pj_sockaddr_get_addr_len(&si->rem_addr)); } } } if (!pj_sockaddr_has_addr(&si->rem_rtcp)) { int rtcp_port; pj_memcpy(&si->rem_rtcp, &si->rem_addr, sizeof(pj_sockaddr)); rtcp_port = pj_sockaddr_get_port(&si->rem_addr) + 1; pj_sockaddr_set_port(&si->rem_rtcp, (pj_uint16_t)rtcp_port); } /* Get codec info and param */ status = get_video_codec_info_param(si, pool, NULL, local_m, rem_m); /* Leave SSRC to random. */ si->ssrc = pj_rand(); /* Set default jitter buffer parameter. */ si->jb_init = si->jb_max = si->jb_min_pre = si->jb_max_pre = -1; return status; }