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/* 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.
*/
/**
* SECTION:gstwebrtc-dtlstransport
* @short_description: RTCDtlsTransport object
* @title: GstWebRTCDTLSTransport
* @see_also: #GstWebRTCRTPSender, #GstWebRTCRTPReceiver, #GstWebRTCICETransport
*
* <ulink url="https://www.w3.org/TR/webrtc/#rtcdtlstransport">https://www.w3.org/TR/webrtc/#rtcdtlstransport</ulink>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "dtlstransport.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,
"dtlstransport", 0, "dtlstransport");
);
enum
{
SIGNAL_0,
LAST_SIGNAL,
};
enum
{
PROP_0,
PROP_SESSION_ID,
PROP_TRANSPORT,
PROP_STATE,
PROP_CLIENT,
PROP_CERTIFICATE,
PROP_REMOTE_CERTIFICATE,
PROP_RTCP,
};
void
gst_webrtc_dtls_transport_set_transport (GstWebRTCDTLSTransport * transport,
GstWebRTCICETransport * ice)
{
g_return_if_fail (GST_IS_WEBRTC_DTLS_TRANSPORT (transport));
g_return_if_fail (GST_IS_WEBRTC_ICE_TRANSPORT (ice));
gst_object_replace ((GstObject **) & transport->transport, GST_OBJECT (ice));
}
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);
gst_element_set_locked_state (webrtc->dtlssrtpenc, FALSE);
gst_element_sync_state_with_parent (webrtc->dtlssrtpenc);
break;
case PROP_CERTIFICATE:
g_object_set_property (G_OBJECT (webrtc->dtlssrtpdec), "pem", value);
break;
case PROP_RTCP:
webrtc->is_rtcp = g_value_get_boolean (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:
g_value_set_uint (value, webrtc->session_id);
break;
case PROP_TRANSPORT:
g_value_set_object (value, webrtc->transport);
break;
case PROP_STATE:
g_value_set_enum (value, webrtc->state);
break;
case PROP_CLIENT:
g_object_get_property (G_OBJECT (webrtc->dtlssrtpenc), "is-client",
value);
break;
case PROP_CERTIFICATE:
g_object_get_property (G_OBJECT (webrtc->dtlssrtpdec), "pem", value);
break;
case PROP_REMOTE_CERTIFICATE:
g_object_get_property (G_OBJECT (webrtc->dtlssrtpdec), "peer-pem", value);
break;
case PROP_RTCP:
g_value_set_boolean (value, webrtc->is_rtcp);
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
gst_webrtc_dtls_transport_constructed (GObject * object)
{
GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object);
gchar *connection_id;
/* 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 ("%s_%u_%u", webrtc->is_rtcp ? "rtcp" : "rtp",
webrtc->session_id, g_random_int ());
webrtc->dtlssrtpenc = gst_element_factory_make ("dtlssrtpenc", NULL);
g_object_set (webrtc->dtlssrtpenc, "connection-id", connection_id,
"is-client", webrtc->client, NULL);
webrtc->dtlssrtpdec = gst_element_factory_make ("dtlssrtpdec", NULL);
g_object_set (webrtc->dtlssrtpdec, "connection-id", connection_id, NULL);
g_free (connection_id);
G_OBJECT_CLASS (parent_class)->constructed (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->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));
/* FIXME: implement */
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));
g_object_class_install_property (gobject_class,
PROP_RTCP,
g_param_spec_boolean ("rtcp", "RTCP",
"The transport is being used solely for RTCP", FALSE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
}
static void
gst_webrtc_dtls_transport_init (GstWebRTCDTLSTransport * webrtc)
{
}
GstWebRTCDTLSTransport *
gst_webrtc_dtls_transport_new (guint session_id, gboolean is_rtcp)
{
return g_object_new (GST_TYPE_WEBRTC_DTLS_TRANSPORT, "session-id", session_id,
"rtcp", is_rtcp, NULL);
}
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