void
kms_base_rtp_session_start_transport_send (KmsBaseRtpSession * self,
gboolean offerer)
{
KmsSdpSession *sdp_sess = KMS_SDP_SESSION (self);
GSList *item = kms_sdp_message_context_get_medias (sdp_sess->neg_sdp_ctx);
GSList *remote_media_list =
kms_sdp_message_context_get_medias (sdp_sess->remote_sdp_ctx);
kms_base_rtp_session_check_conn_status (self);
for (; item != NULL; item = g_slist_next (item)) {
SdpMediaConfig *neg_mconf = item->data;
gint mid = kms_sdp_media_config_get_id (neg_mconf);
SdpMediaConfig *remote_mconf;
if (kms_sdp_media_config_is_inactive (neg_mconf)) {
GST_DEBUG_OBJECT (self, "Media (id=%d) inactive", mid);
continue;
}
remote_mconf = g_slist_nth_data (remote_media_list, mid);
if (remote_mconf == NULL) {
GST_WARNING_OBJECT (self, "Media (id=%d) is not in the remote SDP", mid);
continue;
}
if (!kms_base_rtp_session_configure_connection (self, neg_mconf,
remote_mconf, offerer)) {
GST_WARNING_OBJECT (self, "Cannot configure connection for media %d.",
mid);
}
}
}
static void
kms_webrtc_session_configure_connections (KmsWebrtcSession * self,
KmsSdpSession * sess, gboolean offerer)
{
GSList *item = kms_sdp_message_context_get_medias (sess->neg_sdp_ctx);
GSList *remote_media_list =
kms_sdp_message_context_get_medias (sess->remote_sdp_ctx);
for (; item != NULL; item = g_slist_next (item)) {
SdpMediaConfig *neg_mconf = item->data;
gint mid = kms_sdp_media_config_get_id (neg_mconf);
SdpMediaConfig *remote_mconf;
if (kms_sdp_media_config_is_inactive (neg_mconf)) {
GST_DEBUG_OBJECT (self, "Media (id=%d) inactive", mid);
continue;
}
remote_mconf = g_slist_nth_data (remote_media_list, mid);
if (remote_mconf == NULL) {
GST_WARNING_OBJECT (self, "Media (id=%d) is not in the remote SDP", mid);
continue;
}
kms_webrtc_session_configure_connection (self, sess, neg_mconf,
remote_mconf, offerer);
}
}
static gboolean
kms_webrtc_session_local_sdp_add_default_info (KmsWebrtcSession * self)
{
KmsSdpSession *sdp_sess = KMS_SDP_SESSION (self);
SdpMessageContext *local_sdp_ctx = sdp_sess->local_sdp_ctx;
const GstSDPMessage *sdp =
kms_sdp_message_context_get_sdp_message (local_sdp_ctx);
const GSList *item = kms_sdp_message_context_get_medias (local_sdp_ctx);
gboolean use_ipv6;
GstSDPConnection *conn;
conn = (GstSDPConnection *) gst_sdp_message_get_connection (sdp);
gst_sdp_connection_clear (conn);
use_ipv6 = kms_sdp_session_get_use_ipv6 (sdp_sess);
for (; item != NULL; item = g_slist_next (item)) {
SdpMediaConfig *mconf = item->data;
if (kms_sdp_media_config_is_inactive (mconf)) {
gint mid = kms_sdp_media_config_get_id (mconf);
GST_DEBUG_OBJECT (self, "Media (id=%d) inactive", mid);
continue;
}
if (!kms_webrtc_session_sdp_media_add_default_info (self, mconf, use_ipv6)) {
return FALSE;
}
}
return TRUE;
}
static KmsIceCandidate *
kms_ice_nice_agent_get_default_local_candidate (KmsIceBaseAgent * self,
const char *stream_id, guint component_id)
{
KmsIceNiceAgent *nice_agent = KMS_ICE_NICE_AGENT (self);
NiceCandidate *nice_cand;
KmsIceCandidate *ret = NULL;
guint id = atoi (stream_id);
KmsSdpSession *sdp_sess = KMS_SDP_SESSION (nice_agent->priv->session);
SdpMessageContext *local_sdp_ctx = sdp_sess->local_sdp_ctx;
const GSList *item = kms_sdp_message_context_get_medias (local_sdp_ctx);
nice_cand =
nice_agent_get_default_local_candidate (nice_agent->priv->agent, id,
component_id);
for (; item != NULL; item = g_slist_next (item)) {
SdpMediaConfig *mconf = item->data;
gint idx = kms_sdp_media_config_get_id (mconf);
const gchar *mid;
gchar *media_stream_id;
if (kms_sdp_media_config_is_inactive (mconf)) {
GST_DEBUG_OBJECT (self, "Media (id=%d) inactive", idx);
continue;
}
media_stream_id =
kms_webrtc_session_get_stream_id (nice_agent->priv->session, mconf);
if (media_stream_id == NULL) {
goto end;
}
if (media_stream_id != stream_id) {
goto end;
}
mid = kms_sdp_media_config_get_mid (mconf);
if (mid != NULL) {
ret = kms_ice_candidate_new_from_nice (nice_agent->priv->agent, nice_cand,
mid, idx);
goto end;
}
}
end:
nice_candidate_free (nice_cand);
return ret;
}
static void
gst_media_add_remote_candidates (SdpMediaConfig * mconf,
KmsWebRtcBaseConnection * conn,
const gchar * msg_ufrag, const gchar * msg_pwd)
{
const GstSDPMedia *media = kms_sdp_media_config_get_sdp_media (mconf);
KmsIceBaseAgent *agent = conn->agent;
gchar *stream_id = conn->stream_id;
const gchar *ufrag, *pwd;
guint len, i;
ufrag = gst_sdp_media_get_attribute_val (media, SDP_ICE_UFRAG_ATTR);
pwd = gst_sdp_media_get_attribute_val (media, SDP_ICE_PWD_ATTR);
if (!kms_ice_base_agent_set_remote_credentials (agent, stream_id, ufrag, pwd)) {
GST_WARNING ("Cannot set remote media credentials (%s, %s).", ufrag, pwd);
if (!kms_ice_base_agent_set_remote_credentials (agent, stream_id, msg_ufrag,
msg_pwd)) {
GST_WARNING ("Cannot set remote message credentials (%s, %s).", ufrag,
pwd);
return;
} else {
GST_DEBUG ("Set remote message credentials OK (%s, %s).", ufrag, pwd);
}
} else {
GST_DEBUG ("Set remote media credentials OK (%s, %s).", ufrag, pwd);
}
len = gst_sdp_media_attributes_len (media);
for (i = 0; i < len; i++) {
const GstSDPAttribute *attr;
KmsIceCandidate *candidate;
gint idx = kms_sdp_media_config_get_id (mconf);
const gchar *mid = kms_sdp_media_config_get_mid (mconf);
attr = gst_sdp_media_get_attribute (media, i);
if (g_strcmp0 (SDP_CANDIDATE_ATTR, attr->key) != 0) {
continue;
}
candidate = kms_ice_candidate_new (attr->value, mid, idx);
kms_ice_base_agent_add_ice_candidate (agent, candidate, stream_id);
g_object_unref (candidate);
}
}
/* RTP connection begin */
gchar *
kms_utils_create_connection_name_from_media_config (SdpMediaConfig * mconf)
{
SdpMediaGroup *group = kms_sdp_media_config_get_group (mconf);
gchar *conn_name;
if (group != NULL) {
gint gid = kms_sdp_media_group_get_id (group);
conn_name =
g_strdup_printf ("%s%" G_GINT32_FORMAT, BUNDLE_STREAM_NAME, gid);
} else {
gint mid = kms_sdp_media_config_get_id (mconf);
conn_name = g_strdup_printf ("%" G_GINT32_FORMAT, mid);
}
return conn_name;
}
static void
kms_ice_nice_agent_sdp_msg_add_ice_candidate (KmsWebrtcSession * self,
NiceAgent * agent, NiceCandidate * nice_cand, KmsIceBaseAgent * parent)
{
KmsSdpSession *sdp_sess = KMS_SDP_SESSION (self);
SdpMessageContext *local_sdp_ctx = sdp_sess->local_sdp_ctx;
const GSList *item = kms_sdp_message_context_get_medias (local_sdp_ctx);
GList *list = NULL, *iterator = NULL;
KMS_SDP_SESSION_LOCK (self);
for (; item != NULL; item = g_slist_next (item)) {
SdpMediaConfig *mconf = item->data;
gint idx = kms_sdp_media_config_get_id (mconf);
const gchar *mid;
if (kms_sdp_media_config_is_inactive (mconf)) {
GST_DEBUG_OBJECT (self, "Media (id=%d) inactive", idx);
continue;
}
mid =
kms_ice_nice_agent_sdp_media_add_ice_candidate (self, mconf,
agent, nice_cand);
if (mid != NULL) {
KmsIceCandidate *candidate =
kms_ice_candidate_new_from_nice (agent, nice_cand, mid, idx);
list = g_list_append (list, candidate);
}
}
KMS_SDP_SESSION_UNLOCK (self);
for (iterator = list; iterator; iterator = iterator->next) {
g_signal_emit_by_name (parent, "on-ice-candidate",
KMS_ICE_CANDIDATE (iterator->data));
}
g_list_free_full (list, g_object_unref);
}
void
kms_webrtc_session_start_transport_send (KmsWebrtcSession * self,
gboolean offerer)
{
KmsSdpSession *sdp_sess = KMS_SDP_SESSION (self);
const GstSDPMessage *sdp =
kms_sdp_message_context_get_sdp_message (sdp_sess->remote_sdp_ctx);
const GSList *item =
kms_sdp_message_context_get_medias (sdp_sess->neg_sdp_ctx);
GSList *remote_media_list =
kms_sdp_message_context_get_medias (sdp_sess->remote_sdp_ctx);
const gchar *ufrag, *pwd;
/* [rfc5245#section-5.2]
* The agent that generated the offer which
* started the ICE processing MUST take the controlling role, and the
* other MUST take the controlled role.
*/
// TODO: This code should be independent of the ice implementation
if (KMS_IS_ICE_NICE_AGENT (self->agent)) {
KmsIceNiceAgent *nice_agent = KMS_ICE_NICE_AGENT (self->agent);
g_object_set (kms_ice_nice_agent_get_agent (nice_agent), "controlling-mode",
offerer, NULL);
}
/* Configure specific webrtc connection such as SCTP if negotiated */
kms_webrtc_session_configure_connections (self, sdp_sess, offerer);
ufrag = gst_sdp_message_get_attribute_val (sdp, SDP_ICE_UFRAG_ATTR);
pwd = gst_sdp_message_get_attribute_val (sdp, SDP_ICE_PWD_ATTR);
for (; item != NULL; item = g_slist_next (item)) {
SdpMediaConfig *neg_mconf = item->data;
gint mid = kms_sdp_media_config_get_id (neg_mconf);
SdpMediaConfig *remote_mconf;
KmsWebRtcBaseConnection *conn;
if (kms_sdp_media_config_is_inactive (neg_mconf)) {
GST_DEBUG_OBJECT (self, "Media (id=%d) inactive", mid);
continue;
}
conn = kms_webrtc_session_get_connection (self, neg_mconf);
if (conn == NULL) {
continue;
}
remote_mconf = g_slist_nth_data (remote_media_list, mid);
if (remote_mconf == NULL) {
GST_WARNING_OBJECT (self, "Media (id=%d) is not in the remote SDP", mid);
continue;
}
gst_media_add_remote_candidates (remote_mconf, conn, ufrag, pwd);
}
kms_webrtc_session_add_stored_ice_candidates (self);
g_slist_foreach (self->remote_candidates,
kms_webrtc_session_remote_sdp_add_stored_ice_candidates, self);
}
