/* GStreamer * Copyright (C) 2017 Matthew Waters * * 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. */ /** * SECTION:gstwebrtc-dtlstransport * @short_description: RTCDtlsTransport object * @title: GstWebRTCDTLSTransport * @see_also: #GstWebRTCRTPSender, #GstWebRTCRTPReceiver, #GstWebRTCICETransport * @symbols: * - GstWebRTCDTLSTransport * * */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "dtlstransport.h" #include "webrtc-priv.h" #define GST_CAT_DEFAULT gst_webrtc_dtls_transport_debug GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); #define gst_webrtc_dtls_transport_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstWebRTCDTLSTransport, gst_webrtc_dtls_transport, GST_TYPE_OBJECT, GST_DEBUG_CATEGORY_INIT (gst_webrtc_dtls_transport_debug, "webrtcdtlstransport", 0, "webrtcdtlstransport"); ); enum { SIGNAL_0, LAST_SIGNAL, }; enum { PROP_0, PROP_SESSION_ID, PROP_TRANSPORT, PROP_STATE, PROP_CLIENT, PROP_CERTIFICATE, PROP_REMOTE_CERTIFICATE }; void gst_webrtc_dtls_transport_set_transport (GstWebRTCDTLSTransport * transport, GstWebRTCICETransport * ice) { gboolean notify = FALSE; g_return_if_fail (GST_IS_WEBRTC_DTLS_TRANSPORT (transport)); g_return_if_fail (GST_IS_WEBRTC_ICE_TRANSPORT (ice)); GST_OBJECT_LOCK (transport); notify = gst_object_replace ((GstObject **) & transport->transport, GST_OBJECT (ice)); GST_OBJECT_UNLOCK (transport); if (notify) g_object_notify (G_OBJECT (transport), "transport"); } static void gst_webrtc_dtls_transport_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object); switch (prop_id) { case PROP_SESSION_ID: webrtc->session_id = g_value_get_uint (value); break; case PROP_CLIENT: g_object_set_property (G_OBJECT (webrtc->dtlssrtpenc), "is-client", value); break; case PROP_CERTIFICATE: g_object_set_property (G_OBJECT (webrtc->dtlssrtpdec), "pem", value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_webrtc_dtls_transport_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object); 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); break; } } static void gst_webrtc_dtls_transport_finalize (GObject * object) { GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object); if (webrtc->transport) { gst_object_unref (webrtc->transport); } webrtc->transport = NULL; G_OBJECT_CLASS (parent_class)->finalize (object); } static void on_connection_state_changed (GObject * obj, GParamSpec * pspec, gpointer user_data) { GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (user_data); gint state; g_object_get (obj, "connection-state", &state, NULL); switch (state) { case 0: webrtc->state = GST_WEBRTC_DTLS_TRANSPORT_STATE_NEW; break; case 1: webrtc->state = GST_WEBRTC_DTLS_TRANSPORT_STATE_CLOSED; break; default: case 2: webrtc->state = GST_WEBRTC_DTLS_TRANSPORT_STATE_FAILED; break; case 3: webrtc->state = GST_WEBRTC_DTLS_TRANSPORT_STATE_CONNECTING; break; case 4: webrtc->state = GST_WEBRTC_DTLS_TRANSPORT_STATE_CONNECTED; break; } g_object_notify (G_OBJECT (webrtc), "state"); } static void gst_webrtc_dtls_transport_constructed (GObject * 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 */ connection_id = g_strdup_printf ("rtp_%u_%u", webrtc->session_id, 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); } 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 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; g_object_class_install_property (gobject_class, PROP_SESSION_ID, g_param_spec_uint ("session-id", "Session ID", "Unique session ID", 0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_TRANSPORT, g_param_spec_object ("transport", "ICE transport", "ICE transport used by this dtls transport", GST_TYPE_WEBRTC_ICE_TRANSPORT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_STATE, g_param_spec_enum ("state", "DTLS state", "State of the DTLS transport", GST_TYPE_WEBRTC_DTLS_TRANSPORT_STATE, GST_WEBRTC_DTLS_TRANSPORT_STATE_NEW, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CLIENT, g_param_spec_boolean ("client", "DTLS client", "Are we the client in the DTLS handshake?", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CERTIFICATE, g_param_spec_string ("certificate", "DTLS certificate", "DTLS certificate", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_REMOTE_CERTIFICATE, g_param_spec_string ("remote-certificate", "Remote DTLS certificate", "Remote DTLS certificate", NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); } static void gst_webrtc_dtls_transport_init (GstWebRTCDTLSTransport * webrtc) { } GstWebRTCDTLSTransport * gst_webrtc_dtls_transport_new (guint session_id) { return g_object_new (GST_TYPE_WEBRTC_DTLS_TRANSPORT, "session-id", session_id, NULL); }