/* generate a template sdp */
sdp_message_t *
sdp_context_generate_template (sdp_context_t * ctx)
{
sdp_message_t *local;
int inet6;
sdp_message_init (&local);
if (strchr(ctx->localip,':')!=NULL){
inet6=1;
}else inet6=0;
if (!inet6){
sdp_message_v_version_set (local, osip_strdup ("0"));
sdp_message_o_origin_set (local, osip_strdup (ctx->username),
osip_strdup ("123456"), osip_strdup ("654321"),
osip_strdup ("IN"), osip_strdup ("IP4"),
osip_strdup (ctx->localip));
sdp_message_s_name_set (local, osip_strdup ("A conversation"));
sdp_message_c_connection_add (local, -1,
osip_strdup ("IN"), osip_strdup ("IP4"),
osip_strdup (ctx->localip), NULL, NULL);
sdp_message_t_time_descr_add (local, osip_strdup ("0"), osip_strdup ("0"));
}else{
sdp_message_v_version_set (local, osip_strdup ("0"));
sdp_message_o_origin_set (local, osip_strdup (ctx->username),
osip_strdup ("123456"), osip_strdup ("654321"),
osip_strdup ("IN"), osip_strdup ("IP6"),
osip_strdup (ctx->localip));
sdp_message_s_name_set (local, osip_strdup ("A conversation"));
sdp_message_c_connection_add (local, -1,
osip_strdup ("IN"), osip_strdup ("IP6"),
osip_strdup (ctx->localip), NULL, NULL);
sdp_message_t_time_descr_add (local, osip_strdup ("0"), osip_strdup ("0"));
}
return local;
}
static int
sdp_partial_clone (osip_negotiation_t * config,
osip_negotiation_ctx_t * con, sdp_message_t * remote,
sdp_message_t ** dest)
{
int i;
sdp_message_v_version_set (*dest, osip_strdup ("0"));
/* those fields MUST be set */
sdp_message_o_origin_set (*dest,
osip_strdup (config->o_username),
osip_strdup (config->o_session_id),
osip_strdup (config->o_session_version),
osip_strdup (config->o_nettype),
osip_strdup (config->o_addrtype),
osip_strdup (config->o_addr));
sdp_message_s_name_set (*dest, osip_strdup (remote->s_name));
if (config->fcn_set_info != NULL)
config->fcn_set_info (con, *dest);
if (config->fcn_set_uri != NULL)
config->fcn_set_uri (con, *dest);
if (config->fcn_set_emails != NULL)
config->fcn_set_emails (con, *dest);
if (config->fcn_set_phones != NULL)
config->fcn_set_phones (con, *dest);
if (config->c_nettype != NULL)
sdp_message_c_connection_add (*dest, -1,
osip_strdup (config->c_nettype),
osip_strdup (config->c_addrtype),
osip_strdup (config->c_addr),
osip_strdup (config->c_addr_multicast_ttl),
osip_strdup (config->c_addr_multicast_int));
{ /* offer-answer draft says we must copy the "t=" line */
char *tmp = sdp_message_t_start_time_get (remote, 0);
char *tmp2 = sdp_message_t_stop_time_get (remote, 0);
if (tmp == NULL || tmp2 == NULL)
return -1; /* no t line?? */
i =
sdp_message_t_time_descr_add (*dest, osip_strdup (tmp),
osip_strdup (tmp2));
if (i != 0)
return -1;
}
if (config->fcn_set_attributes != NULL)
config->fcn_set_attributes (con, *dest, -1);
return 0;
}
static sdp_message_t *create_generic_sdp(const SalMediaDescription *desc)
{
sdp_message_t *local;
int inet6;
char sessid[16];
char sessver[16];
snprintf(sessid,16,"%i",desc->session_id);
snprintf(sessver,16,"%i",desc->session_ver);
sdp_message_init (&local);
if (strchr(desc->addr,':')!=NULL){
inet6=1;
}else inet6=0;
sdp_message_v_version_set (local, osip_strdup ("0"));
sdp_message_o_origin_set (local, osip_strdup (desc->username),
osip_strdup (sessid), osip_strdup (sessver),
osip_strdup ("IN"), inet6 ? osip_strdup("IP6") : osip_strdup ("IP4"),
osip_strdup (desc->addr));
sdp_message_s_name_set (local, osip_strdup ("Talk"));
if(!sal_media_description_has_dir (desc,SalStreamSendOnly))
{
sdp_message_c_connection_add (local, -1,
osip_strdup ("IN"), inet6 ? osip_strdup ("IP6") : osip_strdup ("IP4"),
osip_strdup (desc->addr), NULL, NULL);
}
else
{
sdp_message_c_connection_add (local, -1,
osip_strdup ("IN"), inet6 ? osip_strdup ("IP6") : osip_strdup ("IP4"),
inet6 ? osip_strdup ("::0") : osip_strdup ("0.0.0.0"), NULL, NULL);
}
sdp_message_t_time_descr_add (local, osip_strdup ("0"), osip_strdup ("0"));
if (desc->bandwidth>0) sdp_message_b_bandwidth_add (local, -1, osip_strdup ("AS"),
int_2char(desc->bandwidth));
return local;
}
static void add_line(sdp_message_t *msg, int lineno, const SalStreamDescription *desc){
const char *mt=NULL;
const MSList *elem;
const char *addr;
const char *dir="sendrecv";
int port;
bool_t strip_well_known_rtpmaps;
switch (desc->type) {
case SalAudio:
mt="audio";
break;
case SalVideo:
mt="video";
break;
case SalOther:
mt=desc->typeother;
break;
}
if (desc->candidates[0].addr[0]!='\0'){
addr=desc->candidates[0].addr;
port=desc->candidates[0].port;
}else{
addr=desc->addr;
port=desc->port;
}
/*only add a c= line within the stream description if address are differents*/
if (strcmp(addr,sdp_message_c_addr_get(msg, -1, 0))!=0){
bool_t inet6;
if (strchr(addr,':')!=NULL){
inet6=TRUE;
}else inet6=FALSE;
sdp_message_c_connection_add (msg, lineno,
osip_strdup ("IN"), inet6 ? osip_strdup ("IP6") : osip_strdup ("IP4"),
osip_strdup (addr), NULL, NULL);
}
sdp_message_m_media_add (msg, osip_strdup (mt),
int_2char (port), NULL,
osip_strdup ("RTP/AVP"));
if (desc->bandwidth>0) sdp_message_b_bandwidth_add (msg, lineno, osip_strdup ("AS"),
int_2char(desc->bandwidth));
if (desc->ptime>0) sdp_message_a_attribute_add(msg,lineno,osip_strdup("ptime"),
int_2char(desc->ptime));
strip_well_known_rtpmaps=ms_list_size(desc->payloads)>5;
if (desc->payloads){
for(elem=desc->payloads;elem!=NULL;elem=elem->next){
add_payload(msg, lineno, (PayloadType*)elem->data,strip_well_known_rtpmaps);
}
}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*/
sdp_message_m_payload_add (msg,lineno, int_2char (0));
}
switch(desc->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) sdp_message_a_attribute_add (msg, lineno, osip_strdup (dir),NULL);
}
int
osip_negotiation_sdp_build_offer (osip_negotiation_t * config,
osip_negotiation_ctx_t * con,
sdp_message_t ** sdp, char *audio_port,
char *video_port)
{
int i;
int media_line = 0;
i = sdp_message_init (sdp);
if (i != 0)
return -1;
sdp_message_v_version_set (*sdp, osip_strdup ("0"));
/* those fields MUST be set */
sdp_message_o_origin_set (*sdp,
osip_strdup (config->o_username),
osip_strdup (config->o_session_id),
osip_strdup (config->o_session_version),
osip_strdup (config->o_nettype),
osip_strdup (config->o_addrtype),
osip_strdup (config->o_addr));
sdp_message_s_name_set (*sdp, osip_strdup ("A call"));
if (config->fcn_set_info != NULL)
config->fcn_set_info (con, *sdp);
if (config->fcn_set_uri != NULL)
config->fcn_set_uri (con, *sdp);
if (config->fcn_set_emails != NULL)
config->fcn_set_emails (con, *sdp);
if (config->fcn_set_phones != NULL)
config->fcn_set_phones (con, *sdp);
if (config->c_nettype != NULL)
sdp_message_c_connection_add (*sdp, -1,
osip_strdup (config->c_nettype),
osip_strdup (config->c_addrtype),
osip_strdup (config->c_addr),
osip_strdup (config->c_addr_multicast_ttl),
osip_strdup (config->c_addr_multicast_int));
{ /* offer-answer draft says we must copy the "t=" line */
/*BEGIN 3082101267 00201037 20130823 modified*/
int now = osip_time (NULL);
/*END 3082101267 00201037 20130823 modified*/
char *tmp = osip_malloc (15);
char *tmp2 = osip_malloc (15);
sprintf (tmp, "%i", now);
sprintf (tmp2, "%i", now + 3600);
i = sdp_message_t_time_descr_add (*sdp, tmp, tmp2);
if (i != 0)
return -1;
}
if (config->fcn_set_attributes != NULL)
config->fcn_set_attributes (con, *sdp, -1);
/* add all audio codec */
if (!osip_list_eol (config->audio_codec, 0))
{
int pos = 0;
__payload_t *my =
(__payload_t *) osip_list_get (config->audio_codec, pos);
/* all media MUST have the same PROTO, PORT. */
sdp_message_m_media_add (*sdp, osip_strdup ("audio"),
osip_strdup (audio_port),
osip_strdup (my->number_of_port),
osip_strdup (my->proto));
while (!osip_list_eol (config->audio_codec, pos))
{
my = (__payload_t *) osip_list_get (config->audio_codec, pos);
sdp_message_m_payload_add (*sdp, media_line,
osip_strdup (my->payload));
if (my->a_rtpmap != NULL)
sdp_message_a_attribute_add (*sdp, media_line,
osip_strdup ("rtpmap"),
osip_strdup (my->a_rtpmap));
pos++;
}
media_line++;
}
/* add all video codec */
if (!osip_list_eol (config->video_codec, 0))
{
int pos = 0;
__payload_t *my =
(__payload_t *) osip_list_get (config->video_codec, pos);
/* all media MUST have the same PROTO, PORT. */
sdp_message_m_media_add (*sdp, osip_strdup ("video"),
osip_strdup (video_port),
osip_strdup (my->number_of_port),
osip_strdup (my->proto));
while (!osip_list_eol (config->video_codec, pos))
{
my = (__payload_t *) osip_list_get (config->video_codec, pos);
sdp_message_m_payload_add (*sdp, media_line,
osip_strdup (my->payload));
if (my->a_rtpmap != NULL)
sdp_message_a_attribute_add (*sdp, media_line,
osip_strdup ("rtpmap"),
osip_strdup (my->a_rtpmap));
pos++;
}
media_line++;
}
return 0;
}
static int
sdp_confirm_media (osip_negotiation_t * config,
osip_negotiation_ctx_t * context, sdp_message_t * remote,
sdp_message_t ** dest)
{
char *payload;
char *tmp, *tmp2, *tmp3, *tmp4;
int ret;
int i;
int k;
int audio_qty = 0; /* accepted audio line: do not accept more than one */
int video_qty = 0;
i = 0;
while (!sdp_message_endof_media (remote, i))
{
tmp = sdp_message_m_media_get (remote, i);
tmp2 = sdp_message_m_port_get (remote, i);
tmp3 = sdp_message_m_number_of_port_get (remote, i);
tmp4 = sdp_message_m_proto_get (remote, i);
if (tmp == NULL)
return -1;
sdp_message_m_media_add (*dest, osip_strdup (tmp), osip_strdup ("0"),
NULL, osip_strdup (tmp4));
k = 0;
if (0 == strncmp (tmp, "audio", 5))
{
do
{
payload = sdp_message_m_payload_get (remote, i, k);
if (payload != NULL)
{
__payload_t *my_payload =
osip_negotiation_find_audio_payload (config, payload);
if (my_payload != NULL) /* payload is supported */
{
ret = -1; /* somtimes, codec can be refused even if supported */
if (config->fcn_accept_audio_codec != NULL)
ret = config->fcn_accept_audio_codec (context, tmp2,
tmp3, audio_qty,
payload);
if (0 == ret)
{
sdp_message_m_payload_add (*dest, i,
osip_strdup (payload));
if (my_payload->a_rtpmap != NULL)
sdp_message_a_attribute_add (*dest, i,
osip_strdup
("rtpmap"),
osip_strdup
(my_payload->
a_rtpmap));
if (my_payload->c_nettype != NULL)
{
sdp_media_t *med =
osip_list_get ((*dest)->m_medias, i);
if (osip_list_eol (med->c_connections, 0))
sdp_message_c_connection_add (*dest, i,
osip_strdup
(my_payload->
c_nettype),
osip_strdup
(my_payload->
c_addrtype),
osip_strdup
(my_payload->
c_addr),
osip_strdup
(my_payload->
c_addr_multicast_ttl),
osip_strdup
(my_payload->
c_addr_multicast_int));
}
}
}
}
k++;
}
while (payload != NULL);
if (NULL != sdp_message_m_payload_get (*dest, i, 0))
audio_qty = 1;
}
else if (0 == strncmp (tmp, "video", 5))
{
do
{
payload = sdp_message_m_payload_get (remote, i, k);
if (payload != NULL)
{
__payload_t *my_payload =
osip_negotiation_find_video_payload (config, payload);
if (my_payload != NULL) /* payload is supported */
{
ret = -1;
if (config->fcn_accept_video_codec != NULL)
ret =
config->fcn_accept_video_codec (context, tmp2, tmp3,
video_qty, payload);
if (0 == ret)
{
sdp_message_m_payload_add (*dest, i,
osip_strdup (payload));
/* TODO set the attribute list (rtpmap..) */
if (my_payload->a_rtpmap != NULL)
sdp_message_a_attribute_add (*dest, i,
osip_strdup
("rtpmap"),
osip_strdup
(my_payload->
a_rtpmap));
if (my_payload->c_nettype != NULL)
{
sdp_media_t *med =
osip_list_get ((*dest)->m_medias, i);
if (osip_list_eol (med->c_connections, 0))
sdp_message_c_connection_add (*dest, i,
osip_strdup
(my_payload->
c_nettype),
osip_strdup
(my_payload->
c_addrtype),
osip_strdup
(my_payload->
c_addr),
osip_strdup
(my_payload->
c_addr_multicast_ttl),
osip_strdup
(my_payload->
c_addr_multicast_int));
}
}
}
}
k++;
}
while (payload != NULL);
if (NULL != sdp_message_m_payload_get (*dest, i, 0))
video_qty = 1;
}
else
{
do
{
payload = sdp_message_m_payload_get (remote, i, k);
if (payload != NULL)
{
__payload_t *my_payload =
osip_negotiation_find_other_payload (config, payload);
if (my_payload != NULL) /* payload is supported */
{
ret = -1;
if (config->fcn_accept_other_codec != NULL)
ret =
config->fcn_accept_other_codec (context, tmp, tmp2,
tmp3, payload);
if (0 == ret)
{
sdp_message_m_payload_add (*dest, i,
osip_strdup (payload));
/* rtpmap has no meaning here! */
if (my_payload->c_nettype != NULL)
{
sdp_media_t *med =
osip_list_get ((*dest)->m_medias, i);
if (osip_list_eol (med->c_connections, 0))
sdp_message_c_connection_add (*dest, i,
osip_strdup
(my_payload->
c_nettype),
osip_strdup
(my_payload->
c_addrtype),
osip_strdup
(my_payload->
c_addr),
osip_strdup
(my_payload->
c_addr_multicast_ttl),
osip_strdup
(my_payload->
c_addr_multicast_int));
}
}
}
}
k++;
}
while (payload != NULL);
}
i++;
}
return 0;
}
