Example #1
0
static void stream_description_to_sdp ( belle_sdp_session_description_t *session_desc, const SalMediaDescription *md, const SalStreamDescription *stream ) {
	belle_sdp_mime_parameter_t* mime_param;
	belle_sdp_media_description_t* media_desc;
	int j;
	MSList* pt_it;
	PayloadType* pt;
	char buffer[1024];
	char* dir=NULL;
	const char *rtp_addr;
	const char *rtcp_addr;
	int rtp_port;
	int rtcp_port;
	bool_t different_rtp_and_rtcp_addr;
	
	rtp_addr=stream->rtp_addr;
	rtcp_addr=stream->rtcp_addr;
	rtp_port=stream->rtp_port;
	rtcp_port=stream->rtcp_port;
	
	media_desc = belle_sdp_media_description_create ( sal_stream_description_get_type_as_string(stream)
				 ,stream->rtp_port
				 ,1
				 ,sal_media_proto_to_string ( stream->proto )
				 ,NULL );
	if (stream->payloads) {
		for ( pt_it=stream->payloads; pt_it!=NULL; pt_it=pt_it->next ) {
			pt= ( PayloadType* ) pt_it->data;
			mime_param= belle_sdp_mime_parameter_create ( pt->mime_type
					, payload_type_get_number ( pt )
					, pt->clock_rate
					,stream->type==SalAudio?1:-1 );
			belle_sdp_mime_parameter_set_parameters ( mime_param,pt->recv_fmtp );
			if ( stream->ptime>0 ) {
				belle_sdp_mime_parameter_set_ptime ( mime_param,stream->ptime );
			}
			belle_sdp_media_description_append_values_from_mime_parameter ( media_desc,mime_param );
			belle_sip_object_unref ( mime_param );
		}
	} else {
		/* to comply with SDP we cannot have an empty payload type number list */
		/* as it happens only when mline is declined with a zero port, it does not matter to put whatever codec*/
		belle_sip_list_t* format = belle_sip_list_append(NULL,0);
		belle_sdp_media_set_media_formats(belle_sdp_media_description_get_media(media_desc),format);
	}
	/*only add a c= line within the stream description if address are differents*/
	if (rtp_addr[0]!='\0' && strcmp(rtp_addr,md->addr)!=0){
		bool_t inet6;
		if (strchr(rtp_addr,':')!=NULL){
			inet6=TRUE;
		}else inet6=FALSE;
		belle_sdp_media_description_set_connection(media_desc,belle_sdp_connection_create("IN", inet6 ? "IP6" : "IP4", rtp_addr));
	}
	
	if ( stream->bandwidth>0 )
		belle_sdp_media_description_set_bandwidth ( media_desc,"AS",stream->bandwidth );

	if ( stream->proto == SalProtoRtpSavp ) {
		/* add crypto lines */
		for ( j=0; j<SAL_CRYPTO_ALGO_MAX; j++ ) {

			switch ( stream->crypto[j].algo ) {
				case AES_128_SHA1_80:
					snprintf ( buffer, sizeof ( buffer ), "%d %s inline:%s",
							   stream->crypto[j].tag, "AES_CM_128_HMAC_SHA1_80", stream->crypto[j].master_key );
					belle_sdp_media_description_add_attribute ( media_desc,belle_sdp_attribute_create ( "crypto",buffer ) );
					break;
				case AES_128_SHA1_32:
					snprintf ( buffer, sizeof ( buffer ), "%d %s inline:%s",
							   stream->crypto[j].tag, "AES_CM_128_HMAC_SHA1_32", stream->crypto[j].master_key );
					belle_sdp_media_description_add_attribute ( media_desc,belle_sdp_attribute_create ( "crypto",buffer ) );
					break;
				case AES_128_NO_AUTH:
					ms_warning ( "Unsupported crypto suite: AES_128_NO_AUTH" );
					break;
				case NO_CIPHER_SHA1_80:
					ms_warning ( "Unsupported crypto suite: NO_CIPHER_SHA1_80" );
					break;
				default:
					j = SAL_CRYPTO_ALGO_MAX;
					/* no break */
			}
		}
	}
	switch ( stream->dir ) {
		case SalStreamSendRecv:
			/*dir="sendrecv";*/
			dir=NULL;
			break;
		case SalStreamRecvOnly:
			dir="recvonly";
			break;
		case SalStreamSendOnly:
			dir="sendonly";
			break;
		case SalStreamInactive:
			dir="inactive";
			break;
	}
	if ( dir ) belle_sdp_media_description_add_attribute ( media_desc,belle_sdp_attribute_create ( dir,NULL ) );
	
	if (rtp_port != 0) {
		different_rtp_and_rtcp_addr = (rtcp_addr[0] != '\0') && (strcmp(rtp_addr, rtcp_addr) != 0);
		if ((rtcp_port != (rtp_port + 1)) || (different_rtp_and_rtcp_addr == TRUE)) {
			if (different_rtp_and_rtcp_addr == TRUE) {
				snprintf(buffer, sizeof(buffer), "%u IN IP4 %s", rtcp_port, rtcp_addr);
			} else {
				snprintf(buffer, sizeof(buffer), "%u",rtcp_port);
			}
			belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("rtcp",buffer));
		}
	}
	if (stream->ice_completed == TRUE) {
		belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("nortpproxy","yes"));
	}
	if (stream->ice_mismatch == TRUE) {
		belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-mismatch",NULL));
	} else {
		if (rtp_port != 0) {
			if (stream->ice_pwd[0] != '\0') 
				belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-pwd",stream->ice_pwd));
			if (stream->ice_ufrag[0] != '\0')
				belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-ufrag",stream->ice_ufrag));
			add_ice_candidates(media_desc,stream);
			add_ice_remote_candidates(media_desc,stream);
		}
	}

	if (stream->rtcp_xr.enabled == TRUE) {
		char sastr[1024] = {0};
		char mastr[1024] = {0};
		size_t saoff = 0;
		size_t maoff = 0;
		const belle_sdp_attribute_t *session_attribute = belle_sdp_session_description_get_attribute(session_desc, "rtcp-xr");
		belle_sdp_attribute_t *media_attribute;
		if (session_attribute != NULL) {
			belle_sip_object_marshal((belle_sip_object_t*)session_attribute, sastr, sizeof(sastr), &saoff);
		}
		media_attribute = create_rtcp_xr_attribute(&stream->rtcp_xr);
		if (media_attribute != NULL) {
			belle_sip_object_marshal((belle_sip_object_t*)media_attribute, mastr, sizeof(mastr), &maoff);
		}
		if (strcmp(sastr, mastr) != 0) {
			belle_sdp_media_description_add_attribute(media_desc, media_attribute);
		} else {
			belle_sip_object_unref((belle_sip_object_t*)media_attribute);
		}
	}

	belle_sdp_session_description_add_media_description(session_desc, media_desc);
}
Example #2
0
static void stream_description_to_sdp ( belle_sdp_session_description_t *session_desc, const SalMediaDescription *md, const SalStreamDescription *stream ) {
	belle_sdp_mime_parameter_t* mime_param;
	belle_sdp_media_description_t* media_desc;
	int j;
	MSList* pt_it;
	PayloadType* pt;
	char buffer[1024];
	char* dir=NULL;
	const char *rtp_addr;
	const char *rtcp_addr;
	int rtp_port;
	int rtcp_port;
	bool_t different_rtp_and_rtcp_addr;

	rtp_addr=stream->rtp_addr;
	rtcp_addr=stream->rtcp_addr;
	rtp_port=stream->rtp_port;
	rtcp_port=stream->rtcp_port;

	media_desc = belle_sdp_media_description_create ( sal_stream_description_get_type_as_string(stream)
				 ,stream->rtp_port
				 ,1
				 ,sal_media_proto_to_string ( stream->proto )
				 ,NULL );
	if (stream->payloads) {
		for ( pt_it=stream->payloads; pt_it!=NULL; pt_it=pt_it->next ) {
			pt= ( PayloadType* ) pt_it->data;
			mime_param= belle_sdp_mime_parameter_create ( pt->mime_type
					, payload_type_get_number ( pt )
					, pt->clock_rate
					, pt->channels>0 ? pt->channels : -1 );
			belle_sdp_mime_parameter_set_parameters ( mime_param,pt->recv_fmtp );
			if ( stream->ptime>0 ) {
				belle_sdp_mime_parameter_set_ptime ( mime_param,stream->ptime );
			}
			belle_sdp_media_description_append_values_from_mime_parameter ( media_desc,mime_param );
			belle_sip_object_unref ( mime_param );
		}
	} else {
		/* to comply with SDP we cannot have an empty payload type number list */
		/* as it happens only when mline is declined with a zero port, it does not matter to put whatever codec*/
		belle_sip_list_t* format = belle_sip_list_append(NULL,0);
		belle_sdp_media_set_media_formats(belle_sdp_media_description_get_media(media_desc),format);
	}
	/*only add a c= line within the stream description if address are differents*/
	if (rtp_addr[0]!='\0' && strcmp(rtp_addr,md->addr)!=0){
		bool_t inet6;
		belle_sdp_connection_t *connection;
		if (strchr(rtp_addr,':')!=NULL){
			inet6=TRUE;
		}else inet6=FALSE;
		connection = belle_sdp_connection_create("IN", inet6 ? "IP6" : "IP4", rtp_addr);
		if (ms_is_multicast(rtp_addr)) {
			/*remove session cline in case of multicast*/
			belle_sdp_session_description_set_connection(session_desc,NULL);
			if (inet6 == FALSE)
				belle_sdp_connection_set_ttl(connection,stream->ttl);
		}
		belle_sdp_media_description_set_connection(media_desc,connection);
	}

	if ( stream->bandwidth>0 )
		belle_sdp_media_description_set_bandwidth ( media_desc,"AS",stream->bandwidth );

	if ((stream->proto == SalProtoRtpSavpf) || (stream->proto == SalProtoRtpSavp)) {
		/* add crypto lines */
		for ( j=0; j<SAL_CRYPTO_ALGO_MAX; j++ ) {
			MSCryptoSuiteNameParams desc;
			if (ms_crypto_suite_to_name_params(stream->crypto[j].algo,&desc)==0){
				if (desc.params)
					snprintf ( buffer, sizeof ( buffer )-1, "%d %s inline:%s %s", stream->crypto[j].tag, desc.name, stream->crypto[j].master_key,desc.params);
				else 
					snprintf ( buffer, sizeof ( buffer )-1, "%d %s inline:%s", stream->crypto[j].tag, desc.name, stream->crypto[j].master_key );
				
				belle_sdp_media_description_add_attribute( media_desc,belle_sdp_attribute_create ("crypto", buffer));
			}else break;
		}
	}

	/* insert DTLS session attribute if needed */
	if ((stream->proto == SalProtoUdpTlsRtpSavpf) || (stream->proto == SalProtoUdpTlsRtpSavp)) {
		char* ssrc_attribute = ms_strdup_printf("%u cname:%s",htonl(stream->rtp_ssrc),stream->rtcp_cname);
		if ((stream->dtls_role != SalDtlsRoleInvalid) && (strlen(stream->dtls_fingerprint)>0)) {
			switch(stream->dtls_role) {
				case SalDtlsRoleIsClient:
					belle_sdp_media_description_add_attribute(media_desc, belle_sdp_attribute_create("setup","active"));
					break;
				case SalDtlsRoleIsServer:
					belle_sdp_media_description_add_attribute(media_desc, belle_sdp_attribute_create("setup","passive"));
					break;
				case SalDtlsRoleUnset:
				default:
					belle_sdp_media_description_add_attribute(media_desc, belle_sdp_attribute_create("setup","actpass"));
					break;
			}
			belle_sdp_media_description_add_attribute(media_desc, belle_sdp_attribute_create("fingerprint",stream->dtls_fingerprint));
		}
		belle_sdp_media_description_add_attribute(media_desc, belle_sdp_attribute_create("ssrc",ssrc_attribute)); /* truc de Jehan a virer? */
		ms_free(ssrc_attribute);
	}

	switch ( stream->dir ) {
		case SalStreamSendRecv:
			/*dir="sendrecv";*/
			dir=NULL;
			break;
		case SalStreamRecvOnly:
			dir="recvonly";
			break;
		case SalStreamSendOnly:
			dir="sendonly";
			break;
		case SalStreamInactive:
			dir="inactive";
			break;
	}
	if ( dir ) belle_sdp_media_description_add_attribute ( media_desc,belle_sdp_attribute_create ( dir,NULL ) );
	
	if (rtp_port != 0) {
		different_rtp_and_rtcp_addr = (rtcp_addr[0] != '\0') && (strcmp(rtp_addr, rtcp_addr) != 0);
		if ((rtcp_port != (rtp_port + 1)) || (different_rtp_and_rtcp_addr == TRUE)) {
			if (different_rtp_and_rtcp_addr == TRUE) {
				snprintf(buffer, sizeof(buffer), "%u IN IP4 %s", rtcp_port, rtcp_addr);
			} else {
				snprintf(buffer, sizeof(buffer), "%u",rtcp_port);
			}
			belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("rtcp",buffer));
		}
	}
	if (stream->ice_completed == TRUE) {
		belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("nortpproxy","yes"));
	}
	if (stream->ice_mismatch == TRUE) {
		belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-mismatch",NULL));
	} else {
		if (rtp_port != 0) {
			if (stream->ice_pwd[0] != '\0') 
				belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-pwd",stream->ice_pwd));
			if (stream->ice_ufrag[0] != '\0')
				belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-ufrag",stream->ice_ufrag));
			add_ice_candidates(media_desc,stream);
			add_ice_remote_candidates(media_desc,stream);
		}
	}

	if ((rtp_port != 0) && ((stream->proto == SalProtoRtpAvpf) || (stream->proto == SalProtoRtpSavpf))) {
		add_rtcp_fb_attributes(media_desc, md, stream);
	}

	if ((rtp_port != 0) && (stream->rtcp_xr.enabled == TRUE)) {
		char sastr[1024] = {0};
		char mastr[1024] = {0};
		size_t saoff = 0;
		size_t maoff = 0;
		const belle_sdp_attribute_t *session_attribute = belle_sdp_session_description_get_attribute(session_desc, "rtcp-xr");
		belle_sdp_attribute_t *media_attribute;
		if (session_attribute != NULL) {
			belle_sip_object_marshal((belle_sip_object_t*)session_attribute, sastr, sizeof(sastr), &saoff);
		}
		media_attribute = create_rtcp_xr_attribute(&stream->rtcp_xr);
		if (media_attribute != NULL) {
			belle_sip_object_marshal((belle_sip_object_t*)media_attribute, mastr, sizeof(mastr), &maoff);
		}
		if (strcmp(sastr, mastr) != 0) {
			belle_sdp_media_description_add_attribute(media_desc, media_attribute);
		} else {
			belle_sip_object_unref((belle_sip_object_t*)media_attribute);
		}
	}
	/*
	 * rfc5576
	 * 4.1.  The "ssrc" Media Attribute
	 * <ssrc-id> is the synchronization source (SSRC) ID of the
	 * source being described, interpreted as a 32-bit unsigned integer in
	 * network byte order and represented in decimal.*/


	belle_sdp_session_description_add_media_description(session_desc, media_desc);
}