char *get_SDP_version(char *buffer)
{
buffer[0]='\0';
sprintf(buffer,"%.0f",NTP_time(time(NULL)));
return buffer;
}
/**
* @brief Create description for an SDP session
*
* @param uri URI of the resource to describe
*
* @return A new GString containing the complete description of the
* session or NULL if the resource was not found or no demuxer
* was found to handle it.
*/
static GString *sdp_session_descr(RTSP_Client *rtsp, RFC822_Request *req)
{
URI *uri = req->uri;
GString *descr = NULL;
double duration;
float currtime_float, restime_float;
Resource *resource;
char *path;
const char *inet_family;
if ( rtsp->peer_sa == NULL ) {
xlog(LOG_ERR, "unable to identify address family for connection");
return NULL;
}
inet_family = rtsp->peer_sa->sa_family == AF_INET6 ? "IP6" : "IP4";
path = g_uri_unescape_string(uri->path, "/");
xlog(LOG_DBG, "[SDP] opening %s", path);
if ( !(resource = r_open(path)) ) {
xlog(LOG_ERR, "[SDP] %s not found", path);
g_free(path);
return NULL;
}
g_free(path);
descr = g_string_new("v=0"SDP_EL);
/* Near enough approximation to run it now */
currtime_float = NTP_time(time(NULL));
restime_float = resource->mtime ? NTP_time(resource->mtime) : currtime_float;
/* Network type: Internet; Address type: IP4. */
g_string_append_printf(descr, "o=- %.0f %.0f IN %s %s"SDP_EL,
currtime_float, restime_float,
inet_family,
uri->host);
/* We might want to provide a better name */
g_string_append(descr, "s=RTSP Session\r\n");
g_string_append_printf(descr,
"c=IN %s %s"SDP_EL,
inet_family,
rtsp->local_host);
g_string_append(descr, "t=0 0"SDP_EL);
// type attribute. We offer only broadcast
g_string_append(descr, "a=type:broadcast"SDP_EL);
/* Server signature; the same as the Server: header */
g_string_append_printf(descr, "a=tool:%s"SDP_EL,
feng_signature);
// control attribute. We should look if aggregate metod is supported?
g_string_append(descr, "a=control:*"SDP_EL);
if ((duration = resource->duration) > 0 &&
duration != HUGE_VAL)
g_string_append_printf(descr, "a=range:npt=0-%f"SDP_EL, duration);
g_list_foreach(resource->tracks,
sdp_track_descr,
descr);
r_close(resource);
xlog(LOG_INF, "[SDP] description:\n%s", descr->str);
return descr;
}