static void add_rtcp_fb_attributes(belle_sdp_media_description_t *media_desc, const SalMediaDescription *md, const SalStreamDescription *stream) {
MSList *pt_it;
PayloadType *pt;
PayloadTypeAvpfParams avpf_params;
bool_t general_trr_int;
uint8_t trr_int = 0;
general_trr_int = is_rtcp_fb_trr_int_the_same_for_all_payloads(stream, &trr_int);
if (general_trr_int == TRUE) {
add_rtcp_fb_trr_int_attribute(media_desc, -1, trr_int);
}
for (pt_it = stream->payloads; pt_it != NULL; pt_it = pt_it->next) {
pt = (PayloadType *)pt_it->data;
/* AVPF/SAVPF profile is used so enable AVPF for all paylad types. */
payload_type_set_flag(pt, PAYLOAD_TYPE_RTCP_FEEDBACK_ENABLED);
avpf_params = payload_type_get_avpf_params(pt);
/* Add rtcp-fb attributes according to the AVPF features of the payload types. */
if (avpf_params.features & PAYLOAD_TYPE_AVPF_PLI) {
add_rtcp_fb_nack_attribute(media_desc, payload_type_get_number(pt), BELLE_SDP_RTCP_FB_PLI);
}
if (avpf_params.features & PAYLOAD_TYPE_AVPF_SLI) {
add_rtcp_fb_nack_attribute(media_desc, payload_type_get_number(pt), BELLE_SDP_RTCP_FB_SLI);
}
if (avpf_params.features & PAYLOAD_TYPE_AVPF_RPSI) {
add_rtcp_fb_nack_attribute(media_desc, payload_type_get_number(pt), BELLE_SDP_RTCP_FB_RPSI);
}
}
}
static int payload_type_fill_from_rtpmap(PayloadType *pt, const char *rtpmap){
if (rtpmap==NULL){
PayloadType *refpt=rtp_profile_get_payload(&av_profile,payload_type_get_number(pt));
if (refpt){
pt->mime_type=ms_strdup(refpt->mime_type);
pt->clock_rate=refpt->clock_rate;
}else{
ms_error("payload number %i has no rtpmap and is unknown in AV Profile, ignored.",
payload_type_get_number(pt));
return -1;
}
}else{
char *mime=ms_strdup(rtpmap);
char *p=strchr(mime,'/');
if (p){
char *chans;
*p='\0';
p++;
chans=strchr(p,'/');
if (chans){
*chans='\0';
chans++;
pt->channels=atoi(chans);
}else pt->channels=1;
pt->clock_rate=atoi(p);
}
pt->mime_type=mime;
}
return 0;
}
static RtpProfile *make_profile(LinphoneCall *call, const SalMediaDescription *md, const SalStreamDescription *desc, int *used_pt){
int bw;
const MSList *elem;
RtpProfile *prof=rtp_profile_new("Call profile");
bool_t first=TRUE;
int remote_bw=0;
LinphoneCore *lc=call->core;
int up_ptime=0;
*used_pt=-1;
for(elem=desc->payloads;elem!=NULL;elem=elem->next){
PayloadType *pt=(PayloadType*)elem->data;
int number;
if ((pt->flags & PAYLOAD_TYPE_FLAG_CAN_SEND) && first) {
if (desc->type==SalAudio){
linphone_core_update_allocated_audio_bandwidth_in_call(call,pt);
up_ptime=linphone_core_get_upload_ptime(lc);
}
*used_pt=payload_type_get_number(pt);
first=FALSE;
}
if (desc->bandwidth>0) remote_bw=desc->bandwidth;
else if (md->bandwidth>0) {
/*case where b=AS is given globally, not per stream*/
remote_bw=md->bandwidth;
if (desc->type==SalVideo){
remote_bw=get_video_bandwidth(remote_bw,call->audio_bw);
}
}
if (desc->type==SalAudio){
bw=get_min_bandwidth(call->audio_bw,remote_bw);
}else bw=get_min_bandwidth(get_video_bandwidth(linphone_core_get_upload_bandwidth (lc),call->audio_bw),remote_bw);
if (bw>0) pt->normal_bitrate=bw*1000;
else if (desc->type==SalAudio){
pt->normal_bitrate=-1;
}
if (desc->ptime>0){
up_ptime=desc->ptime;
}
if (up_ptime>0){
char tmp[40];
snprintf(tmp,sizeof(tmp),"ptime=%i",up_ptime);
payload_type_append_send_fmtp(pt,tmp);
}
number=payload_type_get_number(pt);
if (rtp_profile_get_payload(prof,number)!=NULL){
ms_warning("A payload type with number %i already exists in profile !",number);
}else
rtp_profile_set_payload(prof,number,pt);
}
return prof;
}
static bool_t payload_type_equals(const PayloadType *p1, const PayloadType *p2){
if (p1->type!=p2->type) return FALSE;
if (strcmp(p1->mime_type,p2->mime_type)!=0) return FALSE;
if (p1->clock_rate!=p2->clock_rate) return FALSE;
if (p1->channels!=p2->channels) return FALSE;
if (payload_type_get_number(p1) != payload_type_get_number(p2)) return FALSE;
/*
Do not compare fmtp right now: they are modified internally when the call is started
*/
/*
if (!fmtp_equals(p1->recv_fmtp,p2->recv_fmtp) ||
!fmtp_equals(p1->send_fmtp,p2->send_fmtp))
return FALSE;
*/
return TRUE;
}
static PayloadType * red_match(MSOfferAnswerContext *ctx, const MSList *local_payloads, const PayloadType *refpt, const MSList *remote_payloads, bool_t reading_response) {
const MSList *elem_local, *elem_remote;
PayloadType *red = NULL;
for (elem_local = local_payloads; elem_local != NULL; elem_local = elem_local->next) {
PayloadType *pt = (PayloadType*)elem_local->data;
if (strcasecmp(pt->mime_type, payload_type_t140_red.mime_type) == 0) {
red = payload_type_clone(pt);
for (elem_remote = remote_payloads; elem_remote != NULL; elem_remote = elem_remote->next) {
PayloadType *pt2 = (PayloadType*)elem_remote->data;
if (strcasecmp(pt2->mime_type, payload_type_t140.mime_type) == 0) {
int t140_payload_number = payload_type_get_number(pt2);
char *red_fmtp = ms_strdup_printf("%i/%i/%i", t140_payload_number, t140_payload_number, t140_payload_number);
/*modify the local payload and the return value*/
payload_type_set_recv_fmtp(pt, red_fmtp);
payload_type_set_recv_fmtp(red, red_fmtp);
ms_free(red_fmtp);
break;
}
}
break;
}
}
return red;
}
static bool_t is_known_rtpmap(const PayloadType *pt){
switch(payload_type_get_number(pt)){
case 0:
case 8:
case 3:
case 34:
return TRUE;
}
return FALSE;
}
static void add_payload(sdp_message_t *msg, int line, const PayloadType *pt, bool_t strip_well_known_rtpmaps)
{
char attr[256];
sdp_message_m_payload_add (msg,line, int_2char (payload_type_get_number(pt)));
if (!strip_well_known_rtpmaps || !is_known_rtpmap(pt)){
if (pt->channels>1)
snprintf (attr,sizeof(attr),"%i %s/%i/%i", payload_type_get_number(pt),
pt->mime_type, pt->clock_rate,pt->channels);
else
snprintf (attr,sizeof(attr),"%i %s/%i", payload_type_get_number(pt),
pt->mime_type, pt->clock_rate);
sdp_message_a_attribute_add (msg, line,
osip_strdup ("rtpmap"), osip_strdup(attr));
}
if (pt->recv_fmtp != NULL)
{
snprintf (attr,sizeof(attr),"%i %s", payload_type_get_number(pt),pt->recv_fmtp);
sdp_message_a_attribute_add (msg, line, osip_strdup ("fmtp"),
osip_strdup(attr));
}
}
static bool_t sdp_parse_rtcp_fb_parameters(belle_sdp_media_description_t *media_desc, SalStreamDescription *stream) {
belle_sip_list_t *it;
belle_sdp_attribute_t *attribute;
belle_sdp_rtcp_fb_attribute_t *fb_attribute;
MSList *pt_it;
PayloadType *pt;
int8_t pt_num;
bool_t retval = FALSE;
/* Handle rtcp-fb attributes that concern all payload types. */
for (it = belle_sdp_media_description_get_attributes(media_desc); it != NULL; it = it->next) {
attribute = BELLE_SDP_ATTRIBUTE(it->data);
if (keywordcmp("rtcp-fb", belle_sdp_attribute_get_name(attribute)) == 0) {
fb_attribute = BELLE_SDP_RTCP_FB_ATTRIBUTE(attribute);
if (belle_sdp_rtcp_fb_attribute_get_id(fb_attribute) == -1) {
for (pt_it = stream->payloads; pt_it != NULL; pt_it = pt_it->next) {
pt = (PayloadType *)pt_it->data;
apply_rtcp_fb_attribute_to_payload(fb_attribute, stream, pt);
retval = TRUE;
}
}
}
}
/* Handle rtcp-fb attributes that are specefic to a payload type. */
for (it = belle_sdp_media_description_get_attributes(media_desc); it != NULL; it = it->next) {
attribute = BELLE_SDP_ATTRIBUTE(it->data);
if (keywordcmp("rtcp-fb", belle_sdp_attribute_get_name(attribute)) == 0) {
fb_attribute = BELLE_SDP_RTCP_FB_ATTRIBUTE(attribute);
pt_num = belle_sdp_rtcp_fb_attribute_get_id(fb_attribute);
for (pt_it = stream->payloads; pt_it != NULL; pt_it = pt_it->next) {
pt = (PayloadType *)pt_it->data;
retval = TRUE;
if (payload_type_get_number(pt) == (int)pt_num) {
apply_rtcp_fb_attribute_to_payload(fb_attribute, stream, pt);
}
}
}
}
return retval;
}
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);
}
static MSList *match_payloads(MSFactory *factory, const MSList *local, const MSList *remote, bool_t reading_response, bool_t one_matching_codec){
const MSList *e2,*e1;
MSList *res=NULL;
PayloadType *matched;
bool_t found_codec=FALSE;
for(e2=remote;e2!=NULL;e2=e2->next){
PayloadType *p2=(PayloadType*)e2->data;
matched=find_payload_type_best_match(factory, local, p2, remote, reading_response);
if (matched){
int local_number=payload_type_get_number(matched);
int remote_number=payload_type_get_number(p2);
if (one_matching_codec){
if (strcasecmp(matched->mime_type,"telephone-event")!=0){
if (found_codec){/* we have found a real codec already*/
continue; /*this codec won't be added*/
}else found_codec=TRUE;
}
}
if (p2->send_fmtp){
payload_type_append_send_fmtp(matched,p2->send_fmtp);
}
matched->flags|=PAYLOAD_TYPE_FLAG_CAN_RECV|PAYLOAD_TYPE_FLAG_CAN_SEND;
if (p2->flags & PAYLOAD_TYPE_RTCP_FEEDBACK_ENABLED) {
matched->flags |= PAYLOAD_TYPE_RTCP_FEEDBACK_ENABLED;
/* Negotiation of AVPF features (keep common features) */
matched->avpf.features &= p2->avpf.features;
matched->avpf.rpsi_compatibility = p2->avpf.rpsi_compatibility;
/* Take bigger AVPF trr interval */
if (p2->avpf.trr_interval < matched->avpf.trr_interval) {
matched->avpf.trr_interval = matched->avpf.trr_interval;
}
}
res=ms_list_append(res,matched);
/* we should use the remote numbering even when parsing a response */
payload_type_set_number(matched,remote_number);
payload_type_set_flag(matched, PAYLOAD_TYPE_FROZEN_NUMBER);
if (reading_response && remote_number!=local_number){
ms_warning("For payload type %s, proposed number was %i but the remote phone answered %i",
matched->mime_type, local_number, remote_number);
/*
We must add this payload type with our local numbering in order to be able to receive it.
Indeed despite we must sent with the remote numbering, we must be able to receive with
our local one.
*/
matched=payload_type_clone(matched);
payload_type_set_number(matched,local_number);
payload_type_set_flag(matched, PAYLOAD_TYPE_FROZEN_NUMBER);
res=ms_list_append(res,matched);
}
}else{
if (p2->channels>0)
ms_message("No match for %s/%i/%i",p2->mime_type,p2->clock_rate,p2->channels);
else ms_message("No match for %s/%i",p2->mime_type,p2->clock_rate);
}
}
if (reading_response){
/* add remaning local payload as CAN_RECV only so that if we are in front of a non-compliant equipment we are still able to decode the RTP stream*/
for(e1=local;e1!=NULL;e1=e1->next){
PayloadType *p1=(PayloadType*)e1->data;
bool_t found=FALSE;
for(e2=res;e2!=NULL;e2=e2->next){
PayloadType *p2=(PayloadType*)e2->data;
if (payload_type_get_number(p2)==payload_type_get_number(p1)){
found=TRUE;
break;
}
}
if (!found){
ms_message("Adding %s/%i for compatibility, just in case.",p1->mime_type,p1->clock_rate);
p1=payload_type_clone(p1);
payload_type_set_flag(p1, PAYLOAD_TYPE_FLAG_CAN_RECV);
payload_type_set_flag(p1, PAYLOAD_TYPE_FROZEN_NUMBER);
res=ms_list_append(res,p1);
}
}
}
return res;
}
int linphone_core_get_payload_type_number(LinphoneCore *lc, const PayloadType *pt){
return payload_type_get_number(pt);
}
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);
}
static MSList *match_payloads(const MSList *local, const MSList *remote, bool_t reading_response, bool_t one_matching_codec){
const MSList *e2,*e1;
MSList *res=NULL;
PayloadType *matched;
bool_t found_codec=FALSE;
for(e2=remote;e2!=NULL;e2=e2->next){
PayloadType *p2=(PayloadType*)e2->data;
matched=find_payload_type_best_match(local,p2);
if (matched){
PayloadType *newp;
int local_number=payload_type_get_number(matched);
int remote_number=payload_type_get_number(p2);
if (one_matching_codec){
if (strcasecmp(matched->mime_type,"telephone-event")!=0){
if (found_codec){/* we have found a real codec already*/
continue; /*this codec won't be added*/
}else found_codec=TRUE;
}
}
newp=payload_type_clone(matched);
if (p2->send_fmtp)
payload_type_set_send_fmtp(newp,p2->send_fmtp);
newp->flags|=PAYLOAD_TYPE_FLAG_CAN_RECV|PAYLOAD_TYPE_FLAG_CAN_SEND;
res=ms_list_append(res,newp);
/* we should use the remote numbering even when parsing a response */
payload_type_set_number(newp,remote_number);
if (reading_response && remote_number!=local_number){
ms_warning("For payload type %s, proposed number was %i but the remote phone answered %i",
newp->mime_type, local_number, remote_number);
/*
We must add this payload type with our local numbering in order to be able to receive it.
Indeed despite we must sent with the remote numbering, we must be able to receive with
our local one.
*/
newp=payload_type_clone(newp);
payload_type_set_number(newp,local_number);
res=ms_list_append(res,newp);
}
}else{
ms_message("No match for %s/%i",p2->mime_type,p2->clock_rate);
}
}
if (reading_response){
/* add remaning local payload as CAN_RECV only so that if we are in front of a non-compliant equipment we are still able to decode the RTP stream*/
for(e1=local;e1!=NULL;e1=e1->next){
PayloadType *p1=(PayloadType*)e1->data;
bool_t found=FALSE;
for(e2=res;e2!=NULL;e2=e2->next){
PayloadType *p2=(PayloadType*)e2->data;
if (payload_type_get_number(p2)==payload_type_get_number(p1)){
found=TRUE;
break;
}
}
if (!found){
ms_message("Adding %s/%i for compatibility, just in case.",p1->mime_type,p1->clock_rate);
p1=payload_type_clone(p1);
p1->flags|=PAYLOAD_TYPE_FLAG_CAN_RECV;
res=ms_list_append(res,p1);
}
}
}
return res;
}
