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dtlstransport: Keep strong ref of dtls encoder/decoder

Browse source 
Otherwise get_property() calls for the client, certificate and/or
remote-certificate properties might access moved objects, since the encoder and
decoder are added to the transportsendbin.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4519>
This commit is contained in:
Philippe Normand 2023-05-01 17:46:25 +01:00 committed by GStreamer Marge Bot
parent 51fa6a2656
commit d9c853f165
1 changed files with 30 additions and 2 deletions
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32
subprojects/gst-plugins-bad/gst-libs/gst/webrtc/dtlstransport.c
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@ -112,23 +112,35 @@ gst_webrtc_dtls_transport_get_property (GObject * object, guint prop_id,
switch (prop_id) {
case PROP_SESSION_ID:
GST_OBJECT_LOCK (webrtc);
g_value_set_uint (value, webrtc->session_id);
GST_OBJECT_UNLOCK (webrtc);
break;
case PROP_TRANSPORT:
GST_OBJECT_LOCK (webrtc);
g_value_set_object (value, webrtc->transport);
GST_OBJECT_UNLOCK (webrtc);
break;
case PROP_STATE:
GST_OBJECT_LOCK (webrtc);
g_value_set_enum (value, webrtc->state);
GST_OBJECT_UNLOCK (webrtc);
break;
case PROP_CLIENT:
GST_OBJECT_LOCK (webrtc);
g_object_get_property (G_OBJECT (webrtc->dtlssrtpenc), "is-client",
value);
GST_OBJECT_UNLOCK (webrtc);
break;
case PROP_CERTIFICATE:
GST_OBJECT_LOCK (webrtc);
g_object_get_property (G_OBJECT (webrtc->dtlssrtpdec), "pem", value);
GST_OBJECT_UNLOCK (webrtc);
break;
case PROP_REMOTE_CERTIFICATE:
GST_OBJECT_LOCK (webrtc);
g_object_get_property (G_OBJECT (webrtc->dtlssrtpdec), "peer-pem", value);
GST_OBJECT_UNLOCK (webrtc);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@ -182,9 +194,13 @@ on_connection_state_changed (GObject * obj, GParamSpec * pspec,
static void
gst_webrtc_dtls_transport_constructed (GObject * object)
{
GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object);
GstWebRTCDTLSTransport *webrtc = NULL;
gchar *connection_id;
G_OBJECT_CLASS (parent_class)->constructed (object);
webrtc = GST_WEBRTC_DTLS_TRANSPORT (object);
/* XXX: this may collide with another connection_id however this is only a
* problem if multiple dtls element sets are being used within the same
* process */
@ -192,17 +208,28 @@ gst_webrtc_dtls_transport_constructed (GObject * object)
g_random_int ());
webrtc->dtlssrtpenc = gst_element_factory_make ("dtlssrtpenc", NULL);
gst_object_ref_sink (webrtc->dtlssrtpenc);
g_object_set (webrtc->dtlssrtpenc, "connection-id", connection_id,
"is-client", webrtc->client, "rtp-sync", FALSE, NULL);
webrtc->dtlssrtpdec = gst_element_factory_make ("dtlssrtpdec", NULL);
gst_object_ref_sink (webrtc->dtlssrtpdec);
g_object_set (webrtc->dtlssrtpdec, "connection-id", connection_id, NULL);
g_free (connection_id);
g_signal_connect (webrtc->dtlssrtpenc, "notify::connection-state",
G_CALLBACK (on_connection_state_changed), webrtc);
}
G_OBJECT_CLASS (parent_class)->constructed (object);
static void
gst_webrtc_dtls_transport_dispose (GObject * object)
{
GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object);
gst_clear_object (&webrtc->dtlssrtpdec);
gst_clear_object (&webrtc->dtlssrtpenc);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
@ -211,6 +238,7 @@ gst_webrtc_dtls_transport_class_init (GstWebRTCDTLSTransportClass * klass)
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->constructed = gst_webrtc_dtls_transport_constructed;
gobject_class->dispose = gst_webrtc_dtls_transport_dispose;
gobject_class->get_property = gst_webrtc_dtls_transport_get_property;
gobject_class->set_property = gst_webrtc_dtls_transport_set_property;
gobject_class->finalize = gst_webrtc_dtls_transport_finalize;