1 /* GStreamer
2 * Copyright (C) 2017 Matthew Waters <matthew@centricular.com>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 /**
21 * SECTION:gstwebrtc-dtlstransport
22 * @short_description: RTCDtlsTransport object
23 * @title: GstWebRTCDTLSTransport
24 * @see_also: #GstWebRTCRTPSender, #GstWebRTCRTPReceiver, #GstWebRTCICETransport
25 *
26 * <ulink url="https://www.w3.org/TR/webrtc/#rtcdtlstransport">https://www.w3.org/TR/webrtc/#rtcdtlstransport</ulink>
27 */
28
29 #ifdef HAVE_CONFIG_H
30 # include "config.h"
31 #endif
32
33 #include "dtlstransport.h"
34
35 #define GST_CAT_DEFAULT gst_webrtc_dtls_transport_debug
36 GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
37
38 #define gst_webrtc_dtls_transport_parent_class parent_class
39 G_DEFINE_TYPE_WITH_CODE (GstWebRTCDTLSTransport, gst_webrtc_dtls_transport,
40 GST_TYPE_OBJECT, GST_DEBUG_CATEGORY_INIT (gst_webrtc_dtls_transport_debug,
41 "webrtcdtlstransport", 0, "webrtcdtlstransport");
42 );
43
44 enum
45 {
46 SIGNAL_0,
47 LAST_SIGNAL,
48 };
49
50 enum
51 {
52 PROP_0,
53 PROP_SESSION_ID,
54 PROP_TRANSPORT,
55 PROP_STATE,
56 PROP_CLIENT,
57 PROP_CERTIFICATE,
58 PROP_REMOTE_CERTIFICATE,
59 PROP_RTCP,
60 };
61
62 void
gst_webrtc_dtls_transport_set_transport(GstWebRTCDTLSTransport * transport,GstWebRTCICETransport * ice)63 gst_webrtc_dtls_transport_set_transport (GstWebRTCDTLSTransport * transport,
64 GstWebRTCICETransport * ice)
65 {
66 g_return_if_fail (GST_IS_WEBRTC_DTLS_TRANSPORT (transport));
67 g_return_if_fail (GST_IS_WEBRTC_ICE_TRANSPORT (ice));
68
69 GST_OBJECT_LOCK (transport);
70 gst_object_replace ((GstObject **) & transport->transport, GST_OBJECT (ice));
71 GST_OBJECT_UNLOCK (transport);
72 }
73
74 static void
gst_webrtc_dtls_transport_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)75 gst_webrtc_dtls_transport_set_property (GObject * object, guint prop_id,
76 const GValue * value, GParamSpec * pspec)
77 {
78 GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object);
79
80 switch (prop_id) {
81 case PROP_SESSION_ID:
82 webrtc->session_id = g_value_get_uint (value);
83 break;
84 case PROP_CLIENT:
85 g_object_set_property (G_OBJECT (webrtc->dtlssrtpenc), "is-client",
86 value);
87 break;
88 case PROP_CERTIFICATE:
89 g_object_set_property (G_OBJECT (webrtc->dtlssrtpdec), "pem", value);
90 break;
91 case PROP_RTCP:
92 webrtc->is_rtcp = g_value_get_boolean (value);
93 break;
94 default:
95 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
96 break;
97 }
98 }
99
100 static void
gst_webrtc_dtls_transport_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)101 gst_webrtc_dtls_transport_get_property (GObject * object, guint prop_id,
102 GValue * value, GParamSpec * pspec)
103 {
104 GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object);
105
106 switch (prop_id) {
107 case PROP_SESSION_ID:
108 g_value_set_uint (value, webrtc->session_id);
109 break;
110 case PROP_TRANSPORT:
111 g_value_set_object (value, webrtc->transport);
112 break;
113 case PROP_STATE:
114 g_value_set_enum (value, webrtc->state);
115 break;
116 case PROP_CLIENT:
117 g_object_get_property (G_OBJECT (webrtc->dtlssrtpenc), "is-client",
118 value);
119 break;
120 case PROP_CERTIFICATE:
121 g_object_get_property (G_OBJECT (webrtc->dtlssrtpdec), "pem", value);
122 break;
123 case PROP_REMOTE_CERTIFICATE:
124 g_object_get_property (G_OBJECT (webrtc->dtlssrtpdec), "peer-pem", value);
125 break;
126 case PROP_RTCP:
127 g_value_set_boolean (value, webrtc->is_rtcp);
128 break;
129 default:
130 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
131 break;
132 }
133 }
134
135 static void
gst_webrtc_dtls_transport_finalize(GObject * object)136 gst_webrtc_dtls_transport_finalize (GObject * object)
137 {
138 GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object);
139
140 if (webrtc->transport) {
141 gst_object_unref (webrtc->transport);
142 }
143 webrtc->transport = NULL;
144
145 G_OBJECT_CLASS (parent_class)->finalize (object);
146 }
147
148 static void
gst_webrtc_dtls_transport_constructed(GObject * object)149 gst_webrtc_dtls_transport_constructed (GObject * object)
150 {
151 GstWebRTCDTLSTransport *webrtc = GST_WEBRTC_DTLS_TRANSPORT (object);
152 gchar *connection_id;
153
154 /* XXX: this may collide with another connection_id however this is only a
155 * problem if multiple dtls element sets are being used within the same
156 * process */
157 connection_id = g_strdup_printf ("%s_%u_%u", webrtc->is_rtcp ? "rtcp" : "rtp",
158 webrtc->session_id, g_random_int ());
159
160 webrtc->dtlssrtpenc = gst_element_factory_make ("dtlssrtpenc", NULL);
161 g_object_set (webrtc->dtlssrtpenc, "connection-id", connection_id,
162 "is-client", webrtc->client, NULL);
163
164 webrtc->dtlssrtpdec = gst_element_factory_make ("dtlssrtpdec", NULL);
165 g_object_set (webrtc->dtlssrtpdec, "connection-id", connection_id, NULL);
166 g_free (connection_id);
167
168 G_OBJECT_CLASS (parent_class)->constructed (object);
169 }
170
171 static void
gst_webrtc_dtls_transport_class_init(GstWebRTCDTLSTransportClass * klass)172 gst_webrtc_dtls_transport_class_init (GstWebRTCDTLSTransportClass * klass)
173 {
174 GObjectClass *gobject_class = (GObjectClass *) klass;
175
176 gobject_class->constructed = gst_webrtc_dtls_transport_constructed;
177 gobject_class->get_property = gst_webrtc_dtls_transport_get_property;
178 gobject_class->set_property = gst_webrtc_dtls_transport_set_property;
179 gobject_class->finalize = gst_webrtc_dtls_transport_finalize;
180
181 g_object_class_install_property (gobject_class,
182 PROP_SESSION_ID,
183 g_param_spec_uint ("session-id", "Session ID",
184 "Unique session ID", 0, G_MAXUINT, 0,
185 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
186
187 g_object_class_install_property (gobject_class,
188 PROP_TRANSPORT,
189 g_param_spec_object ("transport", "ICE transport",
190 "ICE transport used by this dtls transport",
191 GST_TYPE_WEBRTC_ICE_TRANSPORT,
192 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
193
194 /* FIXME: implement */
195 g_object_class_install_property (gobject_class,
196 PROP_STATE,
197 g_param_spec_enum ("state", "DTLS state",
198 "State of the DTLS transport",
199 GST_TYPE_WEBRTC_DTLS_TRANSPORT_STATE,
200 GST_WEBRTC_DTLS_TRANSPORT_STATE_NEW,
201 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
202
203 g_object_class_install_property (gobject_class,
204 PROP_CLIENT,
205 g_param_spec_boolean ("client", "DTLS client",
206 "Are we the client in the DTLS handshake?", FALSE,
207 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
208
209 g_object_class_install_property (gobject_class,
210 PROP_CERTIFICATE,
211 g_param_spec_string ("certificate", "DTLS certificate",
212 "DTLS certificate", NULL,
213 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
214
215 g_object_class_install_property (gobject_class,
216 PROP_REMOTE_CERTIFICATE,
217 g_param_spec_string ("remote-certificate", "Remote DTLS certificate",
218 "Remote DTLS certificate", NULL,
219 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
220
221 g_object_class_install_property (gobject_class,
222 PROP_RTCP,
223 g_param_spec_boolean ("rtcp", "RTCP",
224 "The transport is being used solely for RTCP", FALSE,
225 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
226 }
227
228 static void
gst_webrtc_dtls_transport_init(GstWebRTCDTLSTransport * webrtc)229 gst_webrtc_dtls_transport_init (GstWebRTCDTLSTransport * webrtc)
230 {
231 }
232
233 GstWebRTCDTLSTransport *
gst_webrtc_dtls_transport_new(guint session_id,gboolean is_rtcp)234 gst_webrtc_dtls_transport_new (guint session_id, gboolean is_rtcp)
235 {
236 return g_object_new (GST_TYPE_WEBRTC_DTLS_TRANSPORT, "session-id", session_id,
237 "rtcp", is_rtcp, NULL);
238 }
239