void janus_dtls_srtp_send_alert(janus_dtls_srtp *dtls) {
/* Send alert */
janus_refcount_increase(&dtls->ref);
if(dtls != NULL && dtls->ssl != NULL) {
SSL_shutdown(dtls->ssl);
janus_dtls_fd_bridge(dtls);
}
janus_refcount_decrease(&dtls->ref);
}
int janus_dtls_srtp_create_sctp(janus_dtls_srtp *dtls) {
#ifdef HAVE_SCTP
if(dtls == NULL)
return -1;
janus_ice_component *component = (janus_ice_component *)dtls->component;
if(component == NULL)
return -2;
janus_ice_stream *stream = component->stream;
if(!stream)
return -3;
janus_ice_handle *handle = stream->handle;
if(!handle || !handle->agent)
return -4;
if(janus_flags_is_set(&handle->webrtc_flags, JANUS_ICE_HANDLE_WEBRTC_ALERT))
return -5;
dtls->sctp = janus_sctp_association_create(dtls, handle->handle_id, 5000);
if(dtls->sctp == NULL) {
JANUS_LOG(LOG_ERR, "[%"SCNu64"] Error creating SCTP association...\n", handle->handle_id);
return -6;
}
/* We need to start it in a thread, since it has blocking accept/connect stuff */
janus_refcount_increase(&dtls->ref);
janus_refcount_increase(&dtls->sctp->ref);
GError *error = NULL;
char tname[16];
g_snprintf(tname, sizeof(tname), "sctpinit %"SCNu64, handle->handle_id);
g_thread_try_new(tname, janus_dtls_sctp_setup_thread, dtls, &error);
if(error != NULL) {
/* Something went wrong... */
janus_refcount_decrease(&dtls->ref);
janus_refcount_decrease(&dtls->sctp->ref);
JANUS_LOG(LOG_ERR, "[%"SCNu64"] Got error %d (%s) trying to launch the DTLS-SCTP thread...\n", handle->handle_id, error->code, error->message ? error->message : "??");
return -7;
}
return 0;
#else
/* Support for datachannels hasn't been built in */
return -1;
#endif
}
void janus_sdp_find_preferred_codecs(janus_sdp *sdp, const char **acodec, const char **vcodec) {
if(sdp == NULL)
return;
janus_refcount_increase(&sdp->ref);
gboolean audio = FALSE, video = FALSE;
GList *temp = sdp->m_lines;
while(temp) {
/* Which media are available? */
janus_sdp_mline *m = (janus_sdp_mline *)temp->data;
if(m->type == JANUS_SDP_AUDIO && m->port > 0 && m->direction != JANUS_SDP_INACTIVE) {
if(audio == FALSE) {
uint i=0;
for(i=0; i<janus_audio_codecs; i++) {
if(janus_sdp_get_codec_pt(sdp, janus_preferred_audio_codecs[i]) > 0) {
audio = TRUE;
if(acodec)
*acodec = janus_preferred_audio_codecs[i];
break;
}
}
}
} else if(m->type == JANUS_SDP_VIDEO && m->port > 0 && m->direction != JANUS_SDP_INACTIVE) {
if(video == FALSE) {
uint i=0;
for(i=0; i<janus_video_codecs; i++) {
if(janus_sdp_get_codec_pt(sdp, janus_preferred_video_codecs[i]) > 0) {
video = TRUE;
if(vcodec)
*vcodec = janus_preferred_video_codecs[i];
break;
}
}
}
}
if(audio && video)
break;
temp = temp->next;
}
janus_refcount_decrease(&sdp->ref);
}
void janus_sdp_find_first_codecs(janus_sdp *sdp, const char **acodec, const char **vcodec) {
if(sdp == NULL)
return;
janus_refcount_increase(&sdp->ref);
gboolean audio = FALSE, video = FALSE;
GList *temp = sdp->m_lines;
while(temp) {
/* Which media are available? */
janus_sdp_mline *m = (janus_sdp_mline *)temp->data;
if(m->type == JANUS_SDP_AUDIO && m->port > 0 && m->direction != JANUS_SDP_INACTIVE) {
if(audio == FALSE && m->ptypes) {
int pt = GPOINTER_TO_INT(m->ptypes->data);
const char *codec = janus_sdp_get_codec_name(sdp, pt);
codec = janus_sdp_match_preferred_codec(m->type, (char *)codec);
if(codec) {
audio = TRUE;
if(acodec)
*acodec = codec;
}
}
} else if(m->type == JANUS_SDP_VIDEO && m->port > 0 && m->direction != JANUS_SDP_INACTIVE) {
if(video == FALSE && m->ptypes) {
int pt = GPOINTER_TO_INT(m->ptypes->data);
const char *codec = janus_sdp_get_codec_name(sdp, pt);
codec = janus_sdp_match_preferred_codec(m->type, (char *)codec);
if(codec) {
video = TRUE;
if(vcodec)
*vcodec = codec;
}
}
}
if(audio && video)
break;
temp = temp->next;
}
janus_refcount_decrease(&sdp->ref);
}
char *janus_sdp_write(janus_sdp *imported) {
if(!imported)
return NULL;
janus_refcount_increase(&imported->ref);
char *sdp = g_malloc(JANUS_BUFSIZE), buffer[512];
*sdp = '\0';
/* v= */
g_snprintf(buffer, sizeof(buffer), "v=%d\r\n", imported->version);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
/* o= */
g_snprintf(buffer, sizeof(buffer), "o=%s %"SCNu64" %"SCNu64" IN %s %s\r\n",
imported->o_name, imported->o_sessid, imported->o_version,
imported->o_ipv4 ? "IP4" : "IP6", imported->o_addr);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
/* s= */
g_snprintf(buffer, sizeof(buffer), "s=%s\r\n", imported->s_name);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
/* t= */
g_snprintf(buffer, sizeof(buffer), "t=%"SCNu64" %"SCNu64"\r\n", imported->t_start, imported->t_stop);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
/* c= */
if(imported->c_addr != NULL) {
g_snprintf(buffer, sizeof(buffer), "c=IN %s %s\r\n",
imported->c_ipv4 ? "IP4" : "IP6", imported->c_addr);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
}
/* a= */
GList *temp = imported->attributes;
while(temp) {
janus_sdp_attribute *a = (janus_sdp_attribute *)temp->data;
if(a->value != NULL) {
g_snprintf(buffer, sizeof(buffer), "a=%s:%s\r\n", a->name, a->value);
} else {
g_snprintf(buffer, sizeof(buffer), "a=%s\r\n", a->name);
}
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
temp = temp->next;
}
/* m= */
temp = imported->m_lines;
while(temp) {
janus_sdp_mline *m = (janus_sdp_mline *)temp->data;
g_snprintf(buffer, sizeof(buffer), "m=%s %d %s", m->type_str, m->port, m->proto);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
if(m->port == 0) {
/* Remove all payload types/formats if we're rejecting the media */
g_list_free_full(m->fmts, (GDestroyNotify)g_free);
m->fmts = NULL;
g_list_free(m->ptypes);
m->ptypes = NULL;
m->ptypes = g_list_append(m->ptypes, GINT_TO_POINTER(0));
g_strlcat(sdp, " 0", JANUS_BUFSIZE);
} else {
if(m->proto != NULL && strstr(m->proto, "RTP") != NULL) {
/* RTP profile, use payload types */
GList *ptypes = m->ptypes;
while(ptypes) {
g_snprintf(buffer, sizeof(buffer), " %d", GPOINTER_TO_INT(ptypes->data));
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
ptypes = ptypes->next;
}
} else {
/* Something else, use formats */
GList *fmts = m->fmts;
while(fmts) {
g_snprintf(buffer, sizeof(buffer), " %s", (char *)(fmts->data));
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
fmts = fmts->next;
}
}
}
g_strlcat(sdp, "\r\n", JANUS_BUFSIZE);
/* c= */
if(m->c_addr != NULL) {
g_snprintf(buffer, sizeof(buffer), "c=IN %s %s\r\n",
m->c_ipv4 ? "IP4" : "IP6", m->c_addr);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
}
if(m->port > 0) {
/* b= */
if(m->b_name != NULL) {
g_snprintf(buffer, sizeof(buffer), "b=%s:%"SCNu32"\r\n", m->b_name, m->b_value);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
}
}
/* a= (note that we don't format the direction if it's JANUS_SDP_DEFAULT) */
const char *direction = m->direction != JANUS_SDP_DEFAULT ? janus_sdp_mdirection_str(m->direction) : NULL;
if(direction != NULL) {
g_snprintf(buffer, sizeof(buffer), "a=%s\r\n", direction);
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
}
GList *temp2 = m->attributes;
while(temp2) {
janus_sdp_attribute *a = (janus_sdp_attribute *)temp2->data;
if(m->port == 0 && strcasecmp(a->name, "mid")) {
/* This media has been rejected or disabled: we only add the mid attribute, if available */
temp2 = temp2->next;
continue;
}
if(a->value != NULL) {
g_snprintf(buffer, sizeof(buffer), "a=%s:%s\r\n", a->name, a->value);
} else {
g_snprintf(buffer, sizeof(buffer), "a=%s\r\n", a->name);
}
g_strlcat(sdp, buffer, JANUS_BUFSIZE);
temp2 = temp2->next;
}
temp = temp->next;
}
janus_refcount_decrease(&imported->ref);
return sdp;
}