char *
sdp_message_b_bandwidth_get (sdp_message_t * sdp, int pos_media, int pos)
{
sdp_bandwidth_t *band = sdp_message_bandwidth_get (sdp, pos_media, pos);
if (band == NULL)
return NULL;
return band->b_bandwidth;
}
/* to add payloads to the offer, must be called inside the write_offer callback */
void
sdp_context_add_payload (sdp_context_t * ctx, sdp_payload_t * payload, char *media)
{
sdp_message_t *offer = ctx->offer;
char *attr_field;
if (!ctx->incb)
{
eXosip_trace (OSIP_ERROR,
("You must not call sdp_context_add_*_payload outside the write_offer callback\n"));
abort ();
}
if (payload->proto == NULL)
payload->proto = "RTP/AVP";
/*printf("payload->line=%i payload->pt=%i\n",payload->line, payload->pt);*/
if (sdp_message_m_media_get (offer, payload->line) == NULL)
{
/*printf("Adding new mline %s \n",media);*/
/* need a new line */
sdp_message_m_media_add (offer, osip_strdup (media),
int_2char (payload->localport), NULL,
osip_strdup (payload->proto));
if (ctx->relay){
add_relay_info(offer,payload->line,ctx->relay,ctx->relay_session_id);
}
}
sdp_message_m_payload_add (offer, payload->line, int_2char (payload->pt));
if (payload->a_rtpmap != NULL)
{
attr_field =
sstrdup_sprintf ("%i %s", payload->pt,
payload->a_rtpmap);
sdp_message_a_attribute_add (offer, payload->line,
osip_strdup ("rtpmap"), attr_field);
}
if (payload->a_fmtp != NULL)
{
attr_field =
sstrdup_sprintf ("%i %s", payload->pt,
payload->a_fmtp);
sdp_message_a_attribute_add (offer, payload->line, osip_strdup ("fmtp"),
attr_field);
}
if (payload->b_as_bandwidth != 0)
{
if (sdp_message_bandwidth_get(offer,payload->line,0)==NULL){
attr_field =
sstrdup_sprintf ("%i", payload->b_as_bandwidth);
sdp_message_b_bandwidth_add (offer, payload->line, osip_strdup ("AS"),
attr_field);
}
}
}
int sdp_to_media_description(sdp_message_t *msg, SalMediaDescription *desc){
int i,j;
const char *mtype,*proto,*port,*addr,*number;
sdp_bandwidth_t *sbw=NULL;
addr=sdp_message_c_addr_get (msg, -1, 0);
if (addr)
strncpy(desc->addr,addr,sizeof(desc->addr));
for(j=0;(sbw=sdp_message_bandwidth_get(msg,-1,j))!=NULL;++j){
if (strcasecmp(sbw->b_bwtype,"AS")==0) desc->bandwidth=atoi(sbw->b_bandwidth);
}
/* for each m= line */
for (i=0; !sdp_message_endof_media (msg, i) && i<SAL_MEDIA_DESCRIPTION_MAX_STREAMS; i++)
{
SalStreamDescription *stream=&desc->streams[i];
memset(stream,0,sizeof(*stream));
mtype = sdp_message_m_media_get(msg, i);
proto = sdp_message_m_proto_get (msg, i);
port = sdp_message_m_port_get(msg, i);
stream->proto=SalProtoUnknown;
if (proto){
if (strcasecmp(proto,"RTP/AVP")==0)
stream->proto=SalProtoRtpAvp;
else if (strcasecmp(proto,"RTP/SAVP")==0){
stream->proto=SalProtoRtpSavp;
}
}
addr = sdp_message_c_addr_get (msg, i, 0);
if (addr != NULL)
strncpy(stream->addr,addr,sizeof(stream->addr));
if (port)
stream->port=atoi(port);
stream->ptime=_sdp_message_get_a_ptime(msg,i);
if (strcasecmp("audio", mtype) == 0){
stream->type=SalAudio;
}else if (strcasecmp("video", mtype) == 0){
stream->type=SalVideo;
}else {
stream->type=SalOther;
strncpy(stream->typeother,mtype,sizeof(stream->typeother)-1);
}
for(j=0;(sbw=sdp_message_bandwidth_get(msg,i,j))!=NULL;++j){
if (strcasecmp(sbw->b_bwtype,"AS")==0) stream->bandwidth=atoi(sbw->b_bandwidth);
}
stream->dir=_sdp_message_get_mline_dir(msg,i);
/* for each payload type */
for (j=0;((number=sdp_message_m_payload_get (msg, i,j)) != NULL); j++){
const char *rtpmap,*fmtp;
int ptn=atoi(number);
PayloadType *pt=payload_type_new();
payload_type_set_number(pt,ptn);
/* get the rtpmap associated to this codec, if any */
rtpmap=sdp_message_a_attr_value_get_with_pt(msg, i,ptn,"rtpmap");
if (payload_type_fill_from_rtpmap(pt,rtpmap)==0){
/* get the fmtp, if any */
fmtp=sdp_message_a_attr_value_get_with_pt(msg, i, ptn,"fmtp");
payload_type_set_send_fmtp(pt,fmtp);
stream->payloads=ms_list_append(stream->payloads,pt);
ms_message("Found payload %s/%i fmtp=%s",pt->mime_type,pt->clock_rate,
pt->send_fmtp ? pt->send_fmtp : "");
}
}
}
desc->nstreams=i;
return 0;
}
void
sdp_context_read_answer (sdp_context_t *ctx, sdp_message_t *remote)
{
char *mtype;
char *proto, *port, *pt;
int i, j,err;
char *relay;
sdp_payload_t payload,arg_payload;
sdp_handler_t *sdph=ctx->handler;
sdp_bandwidth_t *sbw=NULL;
/* for each m= line */
for (i = 0; !sdp_message_endof_media (remote, i); i++)
{
sdp_payload_init(&payload);
mtype = sdp_message_m_media_get (remote, i);
proto = sdp_message_m_proto_get (remote, i);
port = sdp_message_m_port_get (remote, i);
payload.remoteport = osip_atoi (port);
payload.localport = osip_atoi (sdp_message_m_port_get (ctx->offer, i));
payload.proto = proto;
payload.line = i;
payload.c_addr = sdp_message_c_addr_get (remote, i, 0);
if (payload.c_addr == NULL)
payload.c_addr = sdp_message_c_addr_get (remote, -1, 0);
/*parse relay address if given*/
relay=sdp_message_a_attr_value_get(remote,i,"relay-addr");
if (relay){
payload.relay_host=parse_relay_addr(relay,&payload.relay_port);
}
payload.relay_session_id=sdp_message_a_attr_value_get(remote,i,"relay-session-id");
for(j=0;(sbw=sdp_message_bandwidth_get(remote,i,j))!=NULL;++j){
if (strcasecmp(sbw->b_bwtype,"AS")==0) payload.b_as_bandwidth=atoi(sbw->b_bandwidth);
}
payload.a_ptime=_sdp_message_get_a_ptime(remote,i);
if (keywordcmp ("audio", mtype) == 0)
{
if (sdph->get_audio_codecs != NULL)
{
/* for each payload type */
for (j = 0;
((pt =
sdp_message_m_payload_get (remote, i,
j)) != NULL); j++)
{
payload.pt = osip_atoi (pt);
/* get the rtpmap associated to this codec, if any */
payload.a_rtpmap =
sdp_message_a_attr_value_get_with_pt
(remote, i, payload.pt,
"rtpmap");
/* get the fmtp, if any */
payload.a_fmtp =
sdp_message_a_attr_value_get_with_pt
(remote, i, payload.pt,
"fmtp");
/* ask the application if this codec is supported */
memcpy(&arg_payload,&payload,sizeof(payload));
err = sdph->get_audio_codecs (ctx,
&arg_payload);
}
}
}
else if (keywordcmp ("video", mtype) == 0)
{
if (sdph->get_video_codecs != NULL)
{
/* for each payload type */
for (j = 0;
((pt =
sdp_message_m_payload_get (remote, i,
j)) != NULL); j++)
{
payload.pt = osip_atoi (pt);
/* get the rtpmap associated to this codec, if any */
payload.a_rtpmap =
sdp_message_a_attr_value_get_with_pt
(remote, i, payload.pt,
"rtpmap");
/* get the fmtp, if any */
payload.a_fmtp =
sdp_message_a_attr_value_get_with_pt
(remote, i, payload.pt,
"fmtp");
/* ask the application if this codec is supported */
memcpy(&arg_payload,&payload,sizeof(payload));
err = sdph->get_video_codecs (ctx,
&arg_payload);
}
}
}
}
}
char *
sdp_context_get_answer ( sdp_context_t *ctx,sdp_message_t *remote)
{
sdp_message_t *answer=NULL;
char *mtype=NULL, *tmp=NULL;
char *proto=NULL, *port=NULL, *pt=NULL;
int i, j, ncodec, m_lines_accepted = 0;
int err;
sdp_payload_t payload;
sdp_handler_t *sdph=ctx->handler;
sdp_bandwidth_t *sbw=NULL;
char *relay;
tmp = sdp_message_c_addr_get (remote, 0, 0);
if (tmp == NULL)
tmp = sdp_message_c_addr_get (remote, -1, 0);
if (ctx->localip==NULL) {
/* NULL means guess, otherwise we use the address given as localip */
ctx->localip=osip_malloc(128);
eXosip_guess_localip(strchr(tmp,':') ? AF_INET6 : AF_INET,ctx->localip,128);
}
else eXosip_trace(OSIP_INFO1,("Using firewall address in sdp."));
answer = sdp_context_generate_template (ctx);
/* for each m= line */
for (i = 0; !sdp_message_endof_media (remote, i); i++)
{
sdp_payload_init(&payload);
mtype = sdp_message_m_media_get (remote, i);
proto = sdp_message_m_proto_get (remote, i);
port = sdp_message_m_port_get (remote, i);
payload.remoteport = osip_atoi (port);
payload.proto = proto;
payload.line = i;
payload.c_addr = sdp_message_c_addr_get (remote, i, 0);
if (payload.c_addr == NULL)
payload.c_addr = sdp_message_c_addr_get (remote, -1, 0);
/*parse relay address if given*/
relay=sdp_message_a_attr_value_get(remote,i,"relay-addr");
if (relay){
payload.relay_host=parse_relay_addr(relay,&payload.relay_port);
}
payload.relay_session_id=sdp_message_a_attr_value_get(remote,i,"relay-session-id");
/* get application specific bandwidth, if any */
for(j=0;(sbw=sdp_message_bandwidth_get(remote,i,j))!=NULL;j++){
if (strcasecmp(sbw->b_bwtype,"AS")==0) payload.b_as_bandwidth=atoi(sbw->b_bandwidth);
}
payload.a_ptime=_sdp_message_get_a_ptime(remote,i);
if (keywordcmp ("audio", mtype) == 0)
{
if (sdph->accept_audio_codecs != NULL)
{
ncodec = 0;
/* for each payload type */
for (j = 0;
((pt =
sdp_message_m_payload_get (remote, i,
j)) != NULL); j++)
{
payload.pt = osip_atoi (pt);
/* get the rtpmap associated to this codec, if any */
payload.a_rtpmap =
sdp_message_a_attr_value_get_with_pt
(remote, i, payload.pt,
"rtpmap");
/* get the fmtp, if any */
payload.a_fmtp =
sdp_message_a_attr_value_get_with_pt
(remote, i, payload.pt,
"fmtp");
/* ask the application if this codec is supported */
err = sdph->accept_audio_codecs (ctx,
&payload);
if (err == 0 && payload.localport > 0)
{
ncodec++;
/* codec accepted */
if (ncodec == 1)
{
/* first codec accepted, setup the line */
sdp_message_m_media_add
(answer,
osip_strdup
(mtype),
int_2char
(payload.
localport),
NULL,
osip_strdup
(proto));
/* and accept the remote relay addr if we planned to use our own */
if (ctx->relay!=NULL && relay){
add_relay_info(answer,i,relay,payload.relay_session_id);
}
}
/* add the payload, rtpmap, fmtp */
sdp_message_m_payload_add (answer, i,
int_2char
(payload.
pt));
if (payload.a_rtpmap != NULL)
{
sdp_message_a_attribute_add
(answer, i,
osip_strdup
("rtpmap"),
sstrdup_sprintf
("%i %s",
payload.pt,
payload.
a_rtpmap));
}
if (payload.a_fmtp != NULL)
{
sdp_message_a_attribute_add
(answer, i,
osip_strdup
("fmtp"),
sstrdup_sprintf
("%i %s",
payload.pt,
payload.
a_fmtp));
}
if (payload.b_as_bandwidth !=
0)
{
if (sdp_message_bandwidth_get(answer,i,0)==NULL)
sdp_message_b_bandwidth_add
(answer, i,
osip_strdup
("AS"),
sstrdup_sprintf
("%i",
payload.
b_as_bandwidth));
}
}
}
if (ncodec == 0)
{
/* refuse the line */
refuse_mline(answer,mtype,proto,i);
}
else
m_lines_accepted++;
}
else
{
/* refuse this line (leave port to 0) */
refuse_mline(answer,mtype,proto,i);
}
}
else if (keywordcmp ("video", mtype) == 0)
{
if (sdph->accept_video_codecs != NULL)
{
ncodec = 0;
/* for each payload type */
for (j = 0;
((pt =
sdp_message_m_payload_get (remote, i,
j)) != NULL); j++)
{
payload.pt = osip_atoi (pt);
/* get the rtpmap associated to this codec, if any */
payload.a_rtpmap =
sdp_message_a_attr_value_get_with_pt
(remote, i, payload.pt,
"rtpmap");
/* get the fmtp, if any */
payload.a_fmtp =
sdp_message_a_attr_value_get_with_pt
(remote, i, payload.pt,
"fmtp");
/* ask the application if this codec is supported */
err = sdph->accept_video_codecs (ctx,
&payload);
if (err == 0 && payload.localport > 0)
{
ncodec++;
/* codec accepted */
if (ncodec == 1)
{
/* first codec accepted, setup the line */
sdp_message_m_media_add
(answer,
osip_strdup
(mtype),
int_2char
(payload.localport), NULL,
osip_strdup
(proto));
/* and accept the remote relay addr if we planned to use our own */
if (ctx->relay!=NULL && relay){
add_relay_info(answer,i,relay,payload.relay_session_id);
}
}
/* add the payload, rtpmap, fmtp */
sdp_message_m_payload_add (answer, i,
int_2char
(payload.
pt));
if (payload.a_rtpmap != NULL)
{
sdp_message_a_attribute_add
(answer, i,
osip_strdup
("rtpmap"),
sstrdup_sprintf
("%i %s",
payload.pt,
payload.
a_rtpmap));
}
if (payload.a_fmtp != NULL)
{
sdp_message_a_attribute_add
(answer, i,
osip_strdup
("fmtp"),
sstrdup_sprintf
("%i %s",
payload.pt,
payload.
a_fmtp));
}
if (payload.b_as_bandwidth !=0)
{
if (sdp_message_bandwidth_get(answer,i,0)==NULL)
sdp_message_b_bandwidth_add
(answer, i,
osip_strdup
("AS"),
sstrdup_sprintf
("%i",
payload.
b_as_bandwidth));
}
}
}
if (ncodec == 0)
{
/* refuse the line */
refuse_mline(answer,mtype,proto,i);
}
else
m_lines_accepted++;
}
else
{
/* refuse the line */
refuse_mline(answer,mtype,proto,i);
}
}
}
if (ctx->answer!=NULL)
sdp_message_free(ctx->answer);
ctx->answer = answer;
if (m_lines_accepted > 0){
ctx->negoc_status = 200;
sdp_message_to_str(answer,&tmp);
if (ctx->answerstr!=NULL)
osip_free(ctx->answerstr);
ctx->answerstr=tmp;
return tmp;
}else{
ctx->negoc_status = 415;
return NULL;
}
}