static void initiate_incoming(const SalStreamDescription *local_cap,
const SalStreamDescription *remote_offer,
SalStreamDescription *result, bool_t one_matching_codec) {
result->payloads=match_payloads(local_cap->payloads,remote_offer->payloads, FALSE, one_matching_codec);
result->proto=remote_offer->proto;
result->type=local_cap->type;
result->dir=compute_dir_incoming(local_cap->dir,remote_offer->dir);
if (result->payloads && !only_telephone_event(result->payloads) && (remote_offer->rtp_port!=0 || remote_offer->rtp_port==SalStreamSendOnly)) {
strcpy(result->rtp_addr,local_cap->rtp_addr);
strcpy(result->rtcp_addr,local_cap->rtcp_addr);
result->rtp_port=local_cap->rtp_port;
result->rtcp_port=local_cap->rtcp_port;
result->bandwidth=local_cap->bandwidth;
result->ptime=local_cap->ptime;
} else {
result->rtp_port=0;
}
if (sal_stream_description_has_srtp(result) == TRUE) {
/* select crypto algo */
memset(result->crypto, 0, sizeof(result->crypto));
if (!match_crypto_algo(local_cap->crypto, remote_offer->crypto, &result->crypto[0], &result->crypto_local_tag, TRUE))
result->rtp_port = 0;
}
strcpy(result->ice_pwd, local_cap->ice_pwd);
strcpy(result->ice_ufrag, local_cap->ice_ufrag);
result->ice_mismatch = local_cap->ice_mismatch;
result->ice_completed = local_cap->ice_completed;
memcpy(result->ice_candidates, local_cap->ice_candidates, sizeof(result->ice_candidates));
memcpy(result->ice_remote_candidates, local_cap->ice_remote_candidates, sizeof(result->ice_remote_candidates));
strcpy(result->name,local_cap->name);
}
static void initiate_outgoing(const SalStreamDescription *local_offer,
const SalStreamDescription *remote_answer,
SalStreamDescription *result) {
if (remote_answer->rtp_port!=0)
result->payloads=match_payloads(local_offer->payloads,remote_answer->payloads,TRUE,FALSE);
result->proto=remote_answer->proto;
result->type=local_offer->type;
result->dir=compute_dir_outgoing(local_offer->dir,remote_answer->dir);
if (result->payloads && !only_telephone_event(result->payloads)) {
strcpy(result->rtp_addr,remote_answer->rtp_addr);
strcpy(result->rtcp_addr,remote_answer->rtcp_addr);
result->rtp_port=remote_answer->rtp_port;
result->rtcp_port=remote_answer->rtcp_port;
result->bandwidth=remote_answer->bandwidth;
result->ptime=remote_answer->ptime;
} else {
result->rtp_port=0;
}
if (sal_stream_description_has_srtp(result) == TRUE) {
/* verify crypto algo */
memset(result->crypto, 0, sizeof(result->crypto));
if (!match_crypto_algo(local_offer->crypto, remote_answer->crypto, &result->crypto[0], &result->crypto_local_tag, FALSE))
result->rtp_port = 0;
}
}
bool_t sal_media_description_has_srtp(const SalMediaDescription *md) {
int i;
if (md->nb_streams == 0) return FALSE;
for (i = 0; i < SAL_MEDIA_DESCRIPTION_MAX_STREAMS; i++) {
if (!sal_stream_description_active(&md->streams[i])) continue;
if (sal_stream_description_has_srtp(&md->streams[i]) != TRUE) return FALSE;
}
return TRUE;
}
static void initiate_incoming(MSFactory *factory, const SalStreamDescription *local_cap,
const SalStreamDescription *remote_offer,
SalStreamDescription *result, bool_t one_matching_codec){
result->payloads=match_payloads(factory, local_cap->payloads,remote_offer->payloads, FALSE, one_matching_codec);
result->proto=remote_offer->proto;
result->type=local_cap->type;
result->dir=compute_dir_incoming(local_cap->dir,remote_offer->dir);
if (!result->payloads || only_telephone_event(result->payloads) || remote_offer->rtp_port==0){
result->rtp_port=0;
return;
}
if (remote_offer->rtp_addr[0]!='\0' && ms_is_multicast(remote_offer->rtp_addr)) {
if (sal_stream_description_has_srtp(result) == TRUE) {
ms_message("SAVP not supported for multicast address for remote stream [%p]",remote_offer);
result->rtp_port=0;
return;
}
result->dir=remote_offer->dir;
strcpy(result->rtp_addr,remote_offer->rtp_addr);
strcpy(result->rtcp_addr,remote_offer->rtcp_addr);
result->rtp_port=remote_offer->rtp_port;
/*result->rtcp_port=remote_offer->rtcp_port;*/
result->rtcp_port=0; /* rtcp not supported yet*/
result->bandwidth=remote_offer->bandwidth;
result->ptime=remote_offer->ptime;
result->ttl=remote_offer->ttl;
result->multicast_role = SalMulticastReceiver;
} else {
strcpy(result->rtp_addr,local_cap->rtp_addr);
strcpy(result->rtcp_addr,local_cap->rtcp_addr);
result->rtp_port=local_cap->rtp_port;
result->rtcp_port=local_cap->rtcp_port;
result->bandwidth=local_cap->bandwidth;
result->ptime=local_cap->ptime;
}
if (sal_stream_description_has_srtp(result) == TRUE) {
/* select crypto algo */
memset(result->crypto, 0, sizeof(result->crypto));
if (!match_crypto_algo(local_cap->crypto, remote_offer->crypto, &result->crypto[0], &result->crypto_local_tag, TRUE)) {
result->rtp_port = 0;
ms_message("No matching crypto algo for remote stream's offer [%p]",remote_offer);
}
}
if (remote_offer->haveZrtpHash == 1) {
if (ms_zrtp_available()) { /* if ZRTP is available, set the zrtp hash even if it is not selected */
strncpy((char *)(result->zrtphash), (char *)(local_cap->zrtphash), sizeof(local_cap->zrtphash));
result->haveZrtpHash = 1;
}
}
strcpy(result->ice_pwd, local_cap->ice_pwd);
strcpy(result->ice_ufrag, local_cap->ice_ufrag);
result->ice_mismatch = local_cap->ice_mismatch;
result->set_nortpproxy = local_cap->set_nortpproxy;
memcpy(result->ice_candidates, local_cap->ice_candidates, sizeof(result->ice_candidates));
memcpy(result->ice_remote_candidates, local_cap->ice_remote_candidates, sizeof(result->ice_remote_candidates));
strcpy(result->name,local_cap->name);
result->rtp_ssrc=local_cap->rtp_ssrc;
strncpy(result->rtcp_cname,local_cap->rtcp_cname,sizeof(result->rtcp_cname));
// Handle dtls stream attribute: if both local and remote have a dtls fingerprint and a dtls setup, add the local fingerprint to the answer
// Note: local description usually stores dtls config at session level which means it apply to all streams, check this too
if (((local_cap->dtls_role!=SalDtlsRoleInvalid)) && (remote_offer->dtls_role!=SalDtlsRoleInvalid)
&& (strlen(local_cap->dtls_fingerprint)>0) && (strlen(remote_offer->dtls_fingerprint)>0)) {
strncpy(result->dtls_fingerprint, local_cap->dtls_fingerprint,sizeof(result->dtls_fingerprint));
if (remote_offer->dtls_role==SalDtlsRoleUnset) {
result->dtls_role = SalDtlsRoleIsClient;
}
} else {
result->dtls_fingerprint[0] = '\0';
result->dtls_role = SalDtlsRoleInvalid;
}
result->rtcp_mux = remote_offer->rtcp_mux && local_cap->rtcp_mux;
result->implicit_rtcp_fb = local_cap->implicit_rtcp_fb && remote_offer->implicit_rtcp_fb;
}
static void initiate_outgoing(MSFactory* factory, const SalStreamDescription *local_offer,
const SalStreamDescription *remote_answer,
SalStreamDescription *result){
if (remote_answer->rtp_port!=0)
result->payloads=match_payloads(factory, local_offer->payloads,remote_answer->payloads,TRUE,FALSE);
else {
ms_message("Local stream description [%p] rejected by peer",local_offer);
result->rtp_port=0;
return;
}
result->proto=remote_answer->proto;
result->type=local_offer->type;
if (local_offer->rtp_addr[0]!='\0' && ms_is_multicast(local_offer->rtp_addr)) {
/*6.2 Multicast Streams
...
If a multicast stream is accepted, the address and port information
in the answer MUST match that of the offer. Similarly, the
directionality information in the answer (sendonly, recvonly, or
sendrecv) MUST equal that of the offer. This is because all
participants in a multicast session need to have equivalent views of
the parameters of the session, an underlying assumption of the
multicast bias of RFC 2327.*/
if (strcmp(local_offer->rtp_addr,remote_answer->rtp_addr) !=0 ) {
ms_message("Remote answered IP [%s] does not match offered [%s] for local stream description [%p]"
,remote_answer->rtp_addr
,local_offer->rtp_addr
,local_offer);
result->rtp_port=0;
return;
}
if (local_offer->rtp_port!=remote_answer->rtp_port) {
ms_message("Remote answered rtp port [%i] does not match offered [%i] for local stream description [%p]"
,remote_answer->rtp_port
,local_offer->rtp_port
,local_offer);
result->rtp_port=0;
return;
}
if (local_offer->dir!=remote_answer->dir) {
ms_message("Remote answered dir [%s] does not match offered [%s] for local stream description [%p]"
,sal_stream_dir_to_string(remote_answer->dir)
,sal_stream_dir_to_string(local_offer->dir)
,local_offer);
result->rtp_port=0;
return;
}
if (local_offer->bandwidth!=remote_answer->bandwidth) {
ms_message("Remote answered bandwidth [%i] does not match offered [%i] for local stream description [%p]"
,remote_answer->bandwidth
,local_offer->bandwidth
,local_offer);
result->rtp_port=0;
return;
}
if (local_offer->ptime > 0 && local_offer->ptime!=remote_answer->ptime) {
ms_message("Remote answered ptime [%i] does not match offered [%i] for local stream description [%p]"
,remote_answer->ptime
,local_offer->ptime
,local_offer);
result->rtp_port=0;
return;
}
if (local_offer->ttl > 0 && local_offer->ttl!=remote_answer->ttl) {
ms_message("Remote answered ttl [%i] does not match offered [%i] for local stream description [%p]"
,remote_answer->ttl
,local_offer->ttl
,local_offer);
result->rtp_port=0;
return;
}
result->ttl=local_offer->ttl;
result->dir=local_offer->dir;
result->multicast_role = SalMulticastSender;
} else {
result->dir=compute_dir_outgoing(local_offer->dir,remote_answer->dir);
}
if (result->payloads && !only_telephone_event(result->payloads)){
strcpy(result->rtp_addr,remote_answer->rtp_addr);
strcpy(result->rtcp_addr,remote_answer->rtcp_addr);
result->rtp_port=remote_answer->rtp_port;
result->rtcp_port=remote_answer->rtcp_port;
result->bandwidth=remote_answer->bandwidth;
result->ptime=remote_answer->ptime;
}else{
result->rtp_port=0;
}
if (sal_stream_description_has_srtp(result) == TRUE) {
/* verify crypto algo */
memset(result->crypto, 0, sizeof(result->crypto));
if (!match_crypto_algo(local_offer->crypto, remote_answer->crypto, &result->crypto[0], &result->crypto_local_tag, FALSE))
result->rtp_port = 0;
}
result->rtp_ssrc=local_offer->rtp_ssrc;
strncpy(result->rtcp_cname,local_offer->rtcp_cname,sizeof(result->rtcp_cname));
// Handle dtls session attribute: if both local and remote have a dtls fingerprint and a dtls setup, get the remote fingerprint into the result
if ((local_offer->dtls_role!=SalDtlsRoleInvalid) && (remote_answer->dtls_role!=SalDtlsRoleInvalid)
&&(strlen(local_offer->dtls_fingerprint)>0) && (strlen(remote_answer->dtls_fingerprint)>0)) {
strncpy(result->dtls_fingerprint, remote_answer->dtls_fingerprint,sizeof(result->dtls_fingerprint));
if (remote_answer->dtls_role==SalDtlsRoleIsClient) {
result->dtls_role = SalDtlsRoleIsServer;
} else {
result->dtls_role = SalDtlsRoleIsClient;
}
} else {
result->dtls_fingerprint[0] = '\0';
result->dtls_role = SalDtlsRoleInvalid;
}
result->rtcp_mux = remote_answer->rtcp_mux && local_offer->rtcp_mux;
result->implicit_rtcp_fb = local_offer->implicit_rtcp_fb && remote_answer->implicit_rtcp_fb;
}
static SalStreamDescription * sdp_to_stream_description(SalMediaDescription *md, belle_sdp_media_description_t *media_desc) {
SalStreamDescription *stream;
belle_sdp_connection_t* cnx;
belle_sdp_media_t* media;
belle_sdp_attribute_t* attribute;
belle_sip_list_t *custom_attribute_it;
const char* value;
const char *mtype,*proto;
bool_t has_avpf_attributes;
stream=&md->streams[md->nb_streams];
media=belle_sdp_media_description_get_media ( media_desc );
proto = belle_sdp_media_get_protocol ( media );
stream->proto=SalProtoOther;
if ( proto ) {
if (strcasecmp(proto, "RTP/AVP") == 0) {
stream->proto = SalProtoRtpAvp;
} else if (strcasecmp(proto, "RTP/SAVP") == 0) {
stream->proto = SalProtoRtpSavp;
} else if (strcasecmp(proto, "RTP/AVPF") == 0) {
stream->proto = SalProtoRtpAvpf;
} else if (strcasecmp(proto, "RTP/SAVPF") == 0) {
stream->proto = SalProtoRtpSavpf;
} else if (strcasecmp(proto, "UDP/TLS/RTP/SAVP") == 0) {
stream->proto = SalProtoUdpTlsRtpSavp;
} else if (strcasecmp(proto, "UDP/TLS/RTP/SAVPF") == 0) {
stream->proto = SalProtoUdpTlsRtpSavpf;
} else {
strncpy(stream->proto_other,proto,sizeof(stream->proto_other)-1);
}
}
if ( ( cnx=belle_sdp_media_description_get_connection ( media_desc ) ) && belle_sdp_connection_get_address ( cnx ) ) {
strncpy ( stream->rtp_addr,belle_sdp_connection_get_address ( cnx ), sizeof ( stream->rtp_addr ) -1 );
stream->ttl=belle_sdp_connection_get_ttl(cnx);
}
stream->rtp_port=belle_sdp_media_get_media_port ( media );
mtype = belle_sdp_media_get_media_type ( media );
if ( strcasecmp ( "audio", mtype ) == 0 ) {
stream->type=SalAudio;
} else if ( strcasecmp ( "video", mtype ) == 0 ) {
stream->type=SalVideo;
} else if ( strcasecmp ( "text", mtype ) == 0 ) {
stream->type=SalText;
} else {
stream->type=SalOther;
strncpy ( stream->typeother,mtype,sizeof ( stream->typeother )-1 );
}
if ( belle_sdp_media_description_get_bandwidth ( media_desc,"AS" ) >0 ) {
stream->bandwidth=belle_sdp_media_description_get_bandwidth ( media_desc,"AS" );
}
if ( belle_sdp_media_description_get_attribute ( media_desc,"sendrecv" ) ) {
stream->dir=SalStreamSendRecv;
} else if ( belle_sdp_media_description_get_attribute ( media_desc,"sendonly" ) ) {
stream->dir=SalStreamSendOnly;
} else if ( belle_sdp_media_description_get_attribute ( media_desc,"recvonly" ) ) {
stream->dir=SalStreamRecvOnly;
} else if ( belle_sdp_media_description_get_attribute ( media_desc,"inactive" ) ) {
stream->dir=SalStreamInactive;
} else {
stream->dir=md->dir; /*takes default value if not present*/
}
stream->rtcp_mux = belle_sdp_media_description_get_attribute(media_desc, "rtcp-mux") != NULL;
/* Get media payload types */
sdp_parse_payload_types(media_desc, stream);
/* Get media specific RTCP attribute */
stream->rtcp_port = stream->rtp_port + 1;
snprintf(stream->rtcp_addr, sizeof(stream->rtcp_addr), "%s", stream->rtp_addr);
attribute=belle_sdp_media_description_get_attribute(media_desc,"rtcp");
if (attribute && (value=belle_sdp_attribute_get_value(attribute))!=NULL){
char tmp[256];
int nb = sscanf(value, "%d IN IP4 %s", &stream->rtcp_port, tmp);
if (nb == 1) {
/* SDP rtcp attribute only contains the port */
} else if (nb == 2) {
strncpy(stream->rtcp_addr, tmp, sizeof(stream->rtcp_addr)-1);
} else {
ms_warning("sdp has a strange a=rtcp line (%s) nb=%i", value, nb);
}
}
/* Read DTLS specific attributes : check is some are found in the stream description otherwise copy the session description one(which are at least set to Invalid) */
if (((stream->proto == SalProtoUdpTlsRtpSavpf) || (stream->proto == SalProtoUdpTlsRtpSavp))) {
attribute=belle_sdp_media_description_get_attribute(media_desc,"setup");
if (attribute && (value=belle_sdp_attribute_get_value(attribute))!=NULL){
if (strncmp(value, "actpass", 7) == 0) {
stream->dtls_role = SalDtlsRoleUnset;
} else if (strncmp(value, "active", 6) == 0) {
stream->dtls_role = SalDtlsRoleIsClient;
} else if (strncmp(value, "passive", 7) == 0) {
stream->dtls_role = SalDtlsRoleIsServer;
}
}
if (stream->dtls_role != SalDtlsRoleInvalid && (attribute=belle_sdp_media_description_get_attribute(media_desc,"fingerprint"))) {
strncpy(stream->dtls_fingerprint, belle_sdp_attribute_get_value(attribute),sizeof(stream->dtls_fingerprint));
}
}
/* Read crypto lines if any */
if (sal_stream_description_has_srtp(stream)) {
sdp_parse_media_crypto_parameters(media_desc, stream);
}
/* Get ICE candidate attributes if any */
sdp_parse_media_ice_parameters(media_desc, stream);
has_avpf_attributes = sdp_parse_rtcp_fb_parameters(media_desc, stream);
/* Get RTCP-FB attributes if any */
if (sal_stream_description_has_avpf(stream)) {
enable_avpf_for_stream(stream);
}
else if (has_avpf_attributes ){
stream->implicit_rtcp_fb = TRUE;
}
/* Get RTCP-XR attributes if any */
stream->rtcp_xr = md->rtcp_xr; // Use session parameters if no stream parameters are defined
sdp_parse_media_rtcp_xr_parameters(media_desc, &stream->rtcp_xr);
/* Get the custom attributes */
for (custom_attribute_it = belle_sdp_media_description_get_attributes(media_desc); custom_attribute_it != NULL; custom_attribute_it = custom_attribute_it->next) {
belle_sdp_attribute_t *attr = (belle_sdp_attribute_t *)custom_attribute_it->data;
stream->custom_sdp_attributes = sal_custom_sdp_attribute_append(stream->custom_sdp_attributes, belle_sdp_attribute_get_name(attr), belle_sdp_attribute_get_value(attr));
}
md->nb_streams++;
return stream;
}
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 (sal_stream_description_has_srtp(stream)) {
/* 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",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));
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 (stream->rtcp_mux){
belle_sdp_media_description_add_attribute(media_desc, belle_sdp_attribute_create ("rtcp-mux",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->set_nortpproxy == 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) && (sal_stream_description_has_avpf(stream) || sal_stream_description_has_implicit_avpf(stream))) {
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);
}
}
if (stream->custom_sdp_attributes) {
belle_sdp_session_description_t *custom_desc = (belle_sdp_session_description_t *)stream->custom_sdp_attributes;
belle_sip_list_t *l = belle_sdp_session_description_get_attributes(custom_desc);
belle_sip_list_t *elem;
for (elem = l; elem != NULL; elem = elem->next) {
belle_sdp_media_description_add_attribute(media_desc, (belle_sdp_attribute_t *)elem->data);
}
}
/*
* 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);
}
