gstreamer/ext/webrtc/gstwebrtcice.c
2019-05-13 11:36:27 -04:00

982 lines
25 KiB
C

/* GStreamer
* Copyright (C) 2017 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstwebrtcice.h"
/* libnice */
#include <agent.h>
#include "icestream.h"
#include "nicetransport.h"
/* XXX:
*
* - are locally generated remote candidates meant to be readded to libnice?
*/
static GstUri *_validate_turn_server (GstWebRTCICE * ice, const gchar * s);
#define GST_CAT_DEFAULT gst_webrtc_ice_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
GQuark
gst_webrtc_ice_error_quark (void)
{
return g_quark_from_static_string ("gst-webrtc-ice-error-quark");
}
enum
{
SIGNAL_0,
ON_ICE_CANDIDATE_SIGNAL,
ON_ICE_GATHERING_STATE_CHANGE_SIGNAL,
LAST_SIGNAL,
};
enum
{
PROP_0,
PROP_ICE_GATHERING_STATE,
PROP_STUN_SERVER,
PROP_TURN_SERVER,
PROP_CONTROLLER,
PROP_AGENT,
PROP_FORCE_RELAY,
};
static guint gst_webrtc_ice_signals[LAST_SIGNAL] = { 0 };
struct _GstWebRTCICEPrivate
{
NiceAgent *nice_agent;
GArray *nice_stream_map;
GThread *thread;
GMainContext *main_context;
GMainLoop *loop;
GMutex lock;
GCond cond;
};
#define gst_webrtc_ice_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstWebRTCICE, gst_webrtc_ice,
GST_TYPE_OBJECT, G_ADD_PRIVATE (GstWebRTCICE)
GST_DEBUG_CATEGORY_INIT (gst_webrtc_ice_debug, "webrtcice", 0,
"webrtcice"););
static gboolean
_unlock_pc_thread (GMutex * lock)
{
g_mutex_unlock (lock);
return G_SOURCE_REMOVE;
}
static gpointer
_gst_nice_thread (GstWebRTCICE * ice)
{
g_mutex_lock (&ice->priv->lock);
ice->priv->main_context = g_main_context_new ();
ice->priv->loop = g_main_loop_new (ice->priv->main_context, FALSE);
g_cond_broadcast (&ice->priv->cond);
g_main_context_invoke (ice->priv->main_context,
(GSourceFunc) _unlock_pc_thread, &ice->priv->lock);
g_main_loop_run (ice->priv->loop);
g_mutex_lock (&ice->priv->lock);
g_main_context_unref (ice->priv->main_context);
ice->priv->main_context = NULL;
g_main_loop_unref (ice->priv->loop);
ice->priv->loop = NULL;
g_cond_broadcast (&ice->priv->cond);
g_mutex_unlock (&ice->priv->lock);
return NULL;
}
static void
_start_thread (GstWebRTCICE * ice)
{
g_mutex_lock (&ice->priv->lock);
ice->priv->thread = g_thread_new ("gst-nice-ops",
(GThreadFunc) _gst_nice_thread, ice);
while (!ice->priv->loop)
g_cond_wait (&ice->priv->cond, &ice->priv->lock);
g_mutex_unlock (&ice->priv->lock);
}
static void
_stop_thread (GstWebRTCICE * ice)
{
g_mutex_lock (&ice->priv->lock);
g_main_loop_quit (ice->priv->loop);
while (ice->priv->loop)
g_cond_wait (&ice->priv->cond, &ice->priv->lock);
g_mutex_unlock (&ice->priv->lock);
g_thread_unref (ice->priv->thread);
}
#if 0
static NiceComponentType
_webrtc_component_to_nice (GstWebRTCICEComponent comp)
{
switch (comp) {
case GST_WEBRTC_ICE_COMPONENT_RTP:
return NICE_COMPONENT_TYPE_RTP;
case GST_WEBRTC_ICE_COMPONENT_RTCP:
return NICE_COMPONENT_TYPE_RTCP;
default:
g_assert_not_reached ();
return 0;
}
}
static GstWebRTCICEComponent
_nice_component_to_webrtc (NiceComponentType comp)
{
switch (comp) {
case NICE_COMPONENT_TYPE_RTP:
return GST_WEBRTC_ICE_COMPONENT_RTP;
case NICE_COMPONENT_TYPE_RTCP:
return GST_WEBRTC_ICE_COMPONENT_RTCP;
default:
g_assert_not_reached ();
return 0;
}
}
#endif
struct NiceStreamItem
{
guint session_id;
guint nice_stream_id;
GstWebRTCICEStream *stream;
};
/* TRUE to continue, FALSE to stop */
typedef gboolean (*NiceStreamItemForeachFunc) (struct NiceStreamItem * item,
gpointer user_data);
static void
_nice_stream_item_foreach (GstWebRTCICE * ice, NiceStreamItemForeachFunc func,
gpointer data)
{
int i, len;
len = ice->priv->nice_stream_map->len;
for (i = 0; i < len; i++) {
struct NiceStreamItem *item =
&g_array_index (ice->priv->nice_stream_map, struct NiceStreamItem,
i);
if (!func (item, data))
break;
}
}
/* TRUE for match, FALSE otherwise */
typedef gboolean (*NiceStreamItemFindFunc) (struct NiceStreamItem * item,
gpointer user_data);
struct nice_find
{
NiceStreamItemFindFunc func;
gpointer data;
struct NiceStreamItem *ret;
};
static gboolean
_find_nice_item (struct NiceStreamItem *item, gpointer user_data)
{
struct nice_find *f = user_data;
if (f->func (item, f->data)) {
f->ret = item;
return FALSE;
}
return TRUE;
}
static struct NiceStreamItem *
_nice_stream_item_find (GstWebRTCICE * ice, NiceStreamItemFindFunc func,
gpointer data)
{
struct nice_find f;
f.func = func;
f.data = data;
f.ret = NULL;
_nice_stream_item_foreach (ice, _find_nice_item, &f);
return f.ret;
}
#define NICE_MATCH_INIT { -1, -1, NULL }
static gboolean
_match (struct NiceStreamItem *item, struct NiceStreamItem *m)
{
if (m->session_id != -1 && m->session_id != item->session_id)
return FALSE;
if (m->nice_stream_id != -1 && m->nice_stream_id != item->nice_stream_id)
return FALSE;
if (m->stream != NULL && m->stream != item->stream)
return FALSE;
return TRUE;
}
static struct NiceStreamItem *
_find_item (GstWebRTCICE * ice, guint session_id, guint nice_stream_id,
GstWebRTCICEStream * stream)
{
struct NiceStreamItem m = NICE_MATCH_INIT;
m.session_id = session_id;
m.nice_stream_id = nice_stream_id;
m.stream = stream;
return _nice_stream_item_find (ice, (NiceStreamItemFindFunc) _match, &m);
}
static struct NiceStreamItem *
_create_nice_stream_item (GstWebRTCICE * ice, guint session_id)
{
struct NiceStreamItem item;
item.session_id = session_id;
item.nice_stream_id = nice_agent_add_stream (ice->priv->nice_agent, 2);
item.stream = gst_webrtc_ice_stream_new (ice, item.nice_stream_id);
g_array_append_val (ice->priv->nice_stream_map, item);
return _find_item (ice, item.session_id, item.nice_stream_id, item.stream);
}
static void
_parse_userinfo (const gchar * userinfo, gchar ** user, gchar ** pass)
{
const gchar *colon;
if (!userinfo) {
*user = NULL;
*pass = NULL;
return;
}
colon = g_strstr_len (userinfo, -1, ":");
if (!colon) {
*user = g_strdup (userinfo);
*pass = NULL;
return;
}
*user = g_strndup (userinfo, colon - userinfo);
*pass = g_strdup (&colon[1]);
}
static gchar *
_resolve_host (GstWebRTCICE * ice, const gchar * host)
{
GResolver *resolver = g_resolver_get_default ();
GError *error = NULL;
GInetAddress *addr;
GList *addresses;
GST_DEBUG_OBJECT (ice, "Resolving host %s", host);
if (!(addresses = g_resolver_lookup_by_name (resolver, host, NULL, &error))) {
GST_ERROR ("%s", error->message);
g_clear_error (&error);
return NULL;
}
GST_DEBUG_OBJECT (ice, "Resolved %d addresses for host %s",
g_list_length (addresses), host);
/* XXX: only the first address is used */
addr = addresses->data;
return g_inet_address_to_string (addr);
}
static void
_add_turn_server (GstWebRTCICE * ice, struct NiceStreamItem *item,
GstUri * turn_server)
{
gboolean ret;
gchar *user, *pass;
const gchar *host, *userinfo, *transport, *scheme;
NiceRelayType relays[4] = { 0, };
int i, relay_n = 0;
gchar *ip = NULL;
host = gst_uri_get_host (turn_server);
if (!host) {
GST_ERROR_OBJECT (ice, "Turn server has no host");
goto out;
}
ip = _resolve_host (ice, host);
if (!ip) {
GST_ERROR_OBJECT (ice, "Failed to resolve turn server '%s'", host);
goto out;
}
/* Set the resolved IP as the host since that's what libnice wants */
gst_uri_set_host (turn_server, ip);
scheme = gst_uri_get_scheme (turn_server);
transport = gst_uri_get_query_value (turn_server, "transport");
userinfo = gst_uri_get_userinfo (turn_server);
_parse_userinfo (userinfo, &user, &pass);
if (g_strcmp0 (scheme, "turns") == 0) {
relays[relay_n++] = NICE_RELAY_TYPE_TURN_TLS;
} else if (g_strcmp0 (scheme, "turn") == 0) {
if (!transport || g_strcmp0 (transport, "udp") == 0)
relays[relay_n++] = NICE_RELAY_TYPE_TURN_UDP;
if (!transport || g_strcmp0 (transport, "tcp") == 0)
relays[relay_n++] = NICE_RELAY_TYPE_TURN_TCP;
}
g_assert (relay_n < G_N_ELEMENTS (relays));
for (i = 0; i < relay_n; i++) {
ret = nice_agent_set_relay_info (ice->priv->nice_agent,
item->nice_stream_id, NICE_COMPONENT_TYPE_RTP,
gst_uri_get_host (turn_server), gst_uri_get_port (turn_server), user,
pass, relays[i]);
if (!ret) {
gchar *uri = gst_uri_to_string (turn_server);
GST_ERROR_OBJECT (ice, "Failed to set TURN server '%s'", uri);
g_free (uri);
break;
}
ret = nice_agent_set_relay_info (ice->priv->nice_agent,
item->nice_stream_id, NICE_COMPONENT_TYPE_RTCP,
gst_uri_get_host (turn_server), gst_uri_get_port (turn_server), user,
pass, relays[i]);
if (!ret) {
gchar *uri = gst_uri_to_string (turn_server);
GST_ERROR_OBJECT (ice, "Failed to set TURN server '%s'", uri);
g_free (uri);
break;
}
}
g_free (user);
g_free (pass);
out:
g_free (ip);
}
typedef struct
{
GstWebRTCICE *ice;
struct NiceStreamItem *item;
} AddTurnServerData;
static void
_add_turn_server_func (const gchar * uri, GstUri * turn_server,
AddTurnServerData * data)
{
_add_turn_server (data->ice, data->item, turn_server);
}
static void
_add_stun_server (GstWebRTCICE * ice, GstUri * stun_server)
{
const gchar *msg = "must be of the form stun://<host>:<port>";
const gchar *host;
gchar *s = NULL;
gchar *ip = NULL;
guint port;
GST_DEBUG_OBJECT (ice, "adding stun server, %s", s);
s = gst_uri_to_string (stun_server);
host = gst_uri_get_host (stun_server);
if (!host) {
GST_ERROR_OBJECT (ice, "Stun server '%s' has no host, %s", s, msg);
goto out;
}
port = gst_uri_get_port (stun_server);
if (port == GST_URI_NO_PORT) {
GST_INFO_OBJECT (ice, "Stun server '%s' has no port, assuming 3478", s);
port = 3478;
gst_uri_set_port (stun_server, port);
}
ip = _resolve_host (ice, host);
if (!ip) {
GST_ERROR_OBJECT (ice, "Failed to resolve stun server '%s'", host);
goto out;
}
g_object_set (ice->priv->nice_agent, "stun-server", ip,
"stun-server-port", port, NULL);
out:
g_free (s);
g_free (ip);
}
GstWebRTCICEStream *
gst_webrtc_ice_add_stream (GstWebRTCICE * ice, guint session_id)
{
struct NiceStreamItem m = NICE_MATCH_INIT;
struct NiceStreamItem *item;
AddTurnServerData add_data;
m.session_id = session_id;
item = _nice_stream_item_find (ice, (NiceStreamItemFindFunc) _match, &m);
if (item) {
GST_ERROR_OBJECT (ice, "stream already added with session_id=%u",
session_id);
return 0;
}
if (ice->stun_server) {
_add_stun_server (ice, ice->stun_server);
}
item = _create_nice_stream_item (ice, session_id);
if (ice->turn_server) {
_add_turn_server (ice, item, ice->turn_server);
}
add_data.ice = ice;
add_data.item = item;
g_hash_table_foreach (ice->turn_servers, (GHFunc) _add_turn_server_func,
&add_data);
return item->stream;
}
static void
_on_new_candidate (NiceAgent * agent, NiceCandidate * candidate,
GstWebRTCICE * ice)
{
struct NiceStreamItem *item;
gchar *attr;
item = _find_item (ice, -1, candidate->stream_id, NULL);
if (!item) {
GST_WARNING_OBJECT (ice, "received signal for non-existent stream %u",
candidate->stream_id);
return;
}
if (!candidate->username || !candidate->password) {
gboolean got_credentials;
gchar *ufrag, *password;
got_credentials = nice_agent_get_local_credentials (ice->priv->nice_agent,
candidate->stream_id, &ufrag, &password);
g_warn_if_fail (got_credentials);
if (!candidate->username)
candidate->username = ufrag;
else
g_free (ufrag);
if (!candidate->password)
candidate->password = password;
else
g_free (password);
}
attr = nice_agent_generate_local_candidate_sdp (agent, candidate);
g_signal_emit (ice, gst_webrtc_ice_signals[ON_ICE_CANDIDATE_SIGNAL],
0, item->session_id, attr);
g_free (attr);
}
GstWebRTCICETransport *
gst_webrtc_ice_find_transport (GstWebRTCICE * ice, GstWebRTCICEStream * stream,
GstWebRTCICEComponent component)
{
struct NiceStreamItem *item;
item = _find_item (ice, -1, -1, stream);
g_return_val_if_fail (item != NULL, NULL);
return gst_webrtc_ice_stream_find_transport (item->stream, component);
}
#if 0
/* TODO don't rely on libnice to (de)serialize candidates */
static NiceCandidateType
_candidate_type_from_string (const gchar * s)
{
if (g_strcmp0 (s, "host") == 0) {
return NICE_CANDIDATE_TYPE_HOST;
} else if (g_strcmp0 (s, "srflx") == 0) {
return NICE_CANDIDATE_TYPE_SERVER_REFLEXIVE;
} else if (g_strcmp0 (s, "prflx") == 0) { /* FIXME: is the right string? */
return NICE_CANDIDATE_TYPE_PEER_REFLEXIVE;
} else if (g_strcmp0 (s, "relay") == 0) {
return NICE_CANDIDATE_TYPE_RELAY;
} else {
g_assert_not_reached ();
return 0;
}
}
static const gchar *
_candidate_type_to_string (NiceCandidateType type)
{
switch (type) {
case NICE_CANDIDATE_TYPE_HOST:
return "host";
case NICE_CANDIDATE_TYPE_SERVER_REFLEXIVE:
return "srflx";
case NICE_CANDIDATE_TYPE_PEER_REFLEXIVE:
return "prflx";
case NICE_CANDIDATE_TYPE_RELAY:
return "relay";
default:
g_assert_not_reached ();
return NULL;
}
}
static NiceCandidateTransport
_candidate_transport_from_string (const gchar * s)
{
if (g_strcmp0 (s, "UDP") == 0) {
return NICE_CANDIDATE_TRANSPORT_UDP;
} else if (g_strcmp0 (s, "TCP tcptype") == 0) {
return NICE_CANDIDATE_TRANSPORT_TCP_ACTIVE;
} else if (g_strcmp0 (s, "tcp-passive") == 0) { /* FIXME: is the right string? */
return NICE_CANDIDATE_TRANSPORT_TCP_PASSIVE;
} else if (g_strcmp0 (s, "tcp-so") == 0) {
return NICE_CANDIDATE_TRANSPORT_TCP_SO;
} else {
g_assert_not_reached ();
return 0;
}
}
static const gchar *
_candidate_type_to_string (NiceCandidateType type)
{
switch (type) {
case NICE_CANDIDATE_TYPE_HOST:
return "host";
case NICE_CANDIDATE_TYPE_SERVER_REFLEXIVE:
return "srflx";
case NICE_CANDIDATE_TYPE_PEER_REFLEXIVE:
return "prflx";
case NICE_CANDIDATE_TYPE_RELAY:
return "relay";
default:
g_assert_not_reached ();
return NULL;
}
}
#endif
/* must start with "a=candidate:" */
void
gst_webrtc_ice_add_candidate (GstWebRTCICE * ice, GstWebRTCICEStream * stream,
const gchar * candidate)
{
struct NiceStreamItem *item;
NiceCandidate *cand;
GSList *candidates = NULL;
item = _find_item (ice, -1, -1, stream);
g_return_if_fail (item != NULL);
cand =
nice_agent_parse_remote_candidate_sdp (ice->priv->nice_agent,
item->nice_stream_id, candidate);
if (!cand) {
GST_WARNING_OBJECT (ice, "Could not parse candidate \'%s\'", candidate);
return;
}
candidates = g_slist_append (candidates, cand);
nice_agent_set_remote_candidates (ice->priv->nice_agent, item->nice_stream_id,
cand->component_id, candidates);
g_slist_free (candidates);
nice_candidate_free (cand);
}
gboolean
gst_webrtc_ice_set_remote_credentials (GstWebRTCICE * ice,
GstWebRTCICEStream * stream, gchar * ufrag, gchar * pwd)
{
struct NiceStreamItem *item;
g_return_val_if_fail (ufrag != NULL, FALSE);
g_return_val_if_fail (pwd != NULL, FALSE);
item = _find_item (ice, -1, -1, stream);
g_return_val_if_fail (item != NULL, FALSE);
GST_DEBUG_OBJECT (ice, "Setting remote ICE credentials on "
"ICE stream %u ufrag:%s pwd:%s", item->nice_stream_id, ufrag, pwd);
nice_agent_set_remote_credentials (ice->priv->nice_agent,
item->nice_stream_id, ufrag, pwd);
return TRUE;
}
gboolean
gst_webrtc_ice_add_turn_server (GstWebRTCICE * ice, const gchar * uri)
{
gboolean ret = FALSE;
GstUri *valid_uri;
if (!(valid_uri = _validate_turn_server (ice, uri)))
goto done;
g_hash_table_insert (ice->turn_servers, g_strdup (uri), valid_uri);
ret = TRUE;
done:
return ret;
}
gboolean
gst_webrtc_ice_set_local_credentials (GstWebRTCICE * ice,
GstWebRTCICEStream * stream, gchar * ufrag, gchar * pwd)
{
struct NiceStreamItem *item;
g_return_val_if_fail (ufrag != NULL, FALSE);
g_return_val_if_fail (pwd != NULL, FALSE);
item = _find_item (ice, -1, -1, stream);
g_return_val_if_fail (item != NULL, FALSE);
GST_DEBUG_OBJECT (ice, "Setting local ICE credentials on "
"ICE stream %u ufrag:%s pwd:%s", item->nice_stream_id, ufrag, pwd);
nice_agent_set_local_credentials (ice->priv->nice_agent, item->nice_stream_id,
ufrag, pwd);
return TRUE;
}
gboolean
gst_webrtc_ice_gather_candidates (GstWebRTCICE * ice,
GstWebRTCICEStream * stream)
{
struct NiceStreamItem *item;
item = _find_item (ice, -1, -1, stream);
g_return_val_if_fail (item != NULL, FALSE);
GST_DEBUG_OBJECT (ice, "gather candidates for stream %u",
item->nice_stream_id);
return gst_webrtc_ice_stream_gather_candidates (stream);
}
static void
_clear_ice_stream (struct NiceStreamItem *item)
{
if (!item)
return;
if (item->stream) {
g_signal_handlers_disconnect_by_data (item->stream->ice->priv->nice_agent,
item->stream);
gst_object_unref (item->stream);
}
}
static GstUri *
_validate_turn_server (GstWebRTCICE * ice, const gchar * s)
{
GstUri *uri = gst_uri_from_string (s);
const gchar *userinfo, *scheme;
GList *keys = NULL, *l;
gchar *user = NULL, *pass = NULL;
gboolean turn_tls = FALSE;
guint port;
GST_DEBUG_OBJECT (ice, "validating turn server, %s", s);
if (!uri) {
GST_ERROR_OBJECT (ice, "Could not parse turn server '%s'", s);
return NULL;
}
scheme = gst_uri_get_scheme (uri);
if (g_strcmp0 (scheme, "turn") == 0) {
} else if (g_strcmp0 (scheme, "turns") == 0) {
turn_tls = TRUE;
} else {
GST_ERROR_OBJECT (ice, "unknown scheme '%s'", scheme);
goto out;
}
keys = gst_uri_get_query_keys (uri);
for (l = keys; l; l = l->next) {
gchar *key = l->data;
if (g_strcmp0 (key, "transport") == 0) {
const gchar *transport = gst_uri_get_query_value (uri, "transport");
if (!transport) {
} else if (g_strcmp0 (transport, "udp") == 0) {
} else if (g_strcmp0 (transport, "tcp") == 0) {
} else {
GST_ERROR_OBJECT (ice, "unknown transport value, '%s'", transport);
goto out;
}
} else {
GST_ERROR_OBJECT (ice, "unknown query key, '%s'", key);
goto out;
}
}
/* TODO: Implement error checking similar to the stun server below */
userinfo = gst_uri_get_userinfo (uri);
_parse_userinfo (userinfo, &user, &pass);
if (!user) {
GST_ERROR_OBJECT (ice, "No username specified in '%s'", s);
goto out;
}
if (!pass) {
GST_ERROR_OBJECT (ice, "No password specified in '%s'", s);
goto out;
}
port = gst_uri_get_port (uri);
if (port == GST_URI_NO_PORT) {
if (turn_tls) {
gst_uri_set_port (uri, 5349);
} else {
gst_uri_set_port (uri, 3478);
}
}
out:
g_list_free (keys);
g_free (user);
g_free (pass);
return uri;
}
static void
gst_webrtc_ice_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstWebRTCICE *ice = GST_WEBRTC_ICE (object);
switch (prop_id) {
case PROP_STUN_SERVER:{
const gchar *s = g_value_get_string (value);
GstUri *uri = gst_uri_from_string (s);
const gchar *msg = "must be of the form stun://<host>:<port>";
GST_DEBUG_OBJECT (ice, "setting stun server, %s", s);
if (!uri) {
GST_ERROR_OBJECT (ice, "Couldn't parse stun server '%s', %s", s, msg);
return;
}
if (ice->stun_server)
gst_uri_unref (ice->stun_server);
ice->stun_server = uri;
break;
}
case PROP_TURN_SERVER:{
GstUri *uri = _validate_turn_server (ice, g_value_get_string (value));
if (uri) {
if (ice->turn_server)
gst_uri_unref (ice->turn_server);
ice->turn_server = uri;
}
break;
}
case PROP_CONTROLLER:
g_object_set_property (G_OBJECT (ice->priv->nice_agent),
"controlling-mode", value);
break;
case PROP_FORCE_RELAY:
g_object_set_property (G_OBJECT (ice->priv->nice_agent),
"force-relay", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_webrtc_ice_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstWebRTCICE *ice = GST_WEBRTC_ICE (object);
switch (prop_id) {
case PROP_STUN_SERVER:
if (ice->stun_server)
g_value_take_string (value, gst_uri_to_string (ice->stun_server));
else
g_value_take_string (value, NULL);
break;
case PROP_TURN_SERVER:
if (ice->turn_server)
g_value_take_string (value, gst_uri_to_string (ice->turn_server));
else
g_value_take_string (value, NULL);
break;
case PROP_CONTROLLER:
g_object_get_property (G_OBJECT (ice->priv->nice_agent),
"controlling-mode", value);
break;
case PROP_AGENT:
g_value_set_object (value, ice->priv->nice_agent);
break;
case PROP_FORCE_RELAY:
g_object_get_property (G_OBJECT (ice->priv->nice_agent),
"force-relay", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_webrtc_ice_finalize (GObject * object)
{
GstWebRTCICE *ice = GST_WEBRTC_ICE (object);
g_signal_handlers_disconnect_by_data (ice->priv->nice_agent, ice);
_stop_thread (ice);
if (ice->turn_server)
gst_uri_unref (ice->turn_server);
if (ice->stun_server)
gst_uri_unref (ice->stun_server);
g_mutex_clear (&ice->priv->lock);
g_cond_clear (&ice->priv->cond);
g_array_free (ice->priv->nice_stream_map, TRUE);
g_object_unref (ice->priv->nice_agent);
g_hash_table_unref (ice->turn_servers);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_webrtc_ice_class_init (GstWebRTCICEClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->get_property = gst_webrtc_ice_get_property;
gobject_class->set_property = gst_webrtc_ice_set_property;
gobject_class->finalize = gst_webrtc_ice_finalize;
g_object_class_install_property (gobject_class,
PROP_STUN_SERVER,
g_param_spec_string ("stun-server", "STUN Server",
"The STUN server of the form stun://hostname:port",
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_TURN_SERVER,
g_param_spec_string ("turn-server", "TURN Server",
"The TURN server of the form turn(s)://username:password@host:port",
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_CONTROLLER,
g_param_spec_boolean ("controller", "ICE controller",
"Whether the ICE agent is the controller or controlled. "
"In WebRTC, the initial offerrer is the ICE controller.", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_AGENT,
g_param_spec_object ("agent", "ICE agent",
"ICE agent in use by this object", NICE_TYPE_AGENT,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_FORCE_RELAY,
g_param_spec_boolean ("force-relay", "Force Relay",
"Force all traffic to go through a relay.", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstWebRTCICE::on-ice-candidate:
* @object: the #GstWebRTCBin
* @candidate: the ICE candidate
*/
gst_webrtc_ice_signals[ON_ICE_CANDIDATE_SIGNAL] =
g_signal_new ("on-ice-candidate", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic,
G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_STRING);
}
static void
gst_webrtc_ice_init (GstWebRTCICE * ice)
{
ice->priv = gst_webrtc_ice_get_instance_private (ice);
g_mutex_init (&ice->priv->lock);
g_cond_init (&ice->priv->cond);
ice->turn_servers =
g_hash_table_new_full (g_str_hash, g_str_equal, g_free,
(GDestroyNotify) gst_uri_unref);
_start_thread (ice);
ice->priv->nice_agent = nice_agent_new (ice->priv->main_context,
NICE_COMPATIBILITY_RFC5245);
g_signal_connect (ice->priv->nice_agent, "new-candidate-full",
G_CALLBACK (_on_new_candidate), ice);
ice->priv->nice_stream_map =
g_array_new (FALSE, TRUE, sizeof (struct NiceStreamItem));
g_array_set_clear_func (ice->priv->nice_stream_map,
(GDestroyNotify) _clear_ice_stream);
}
GstWebRTCICE *
gst_webrtc_ice_new (void)
{
return g_object_new (GST_TYPE_WEBRTC_ICE, NULL);
}