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Olivier Naudanb28313f2012-04-16 08:10:18 -04001/* GStreamer
2 * Copyright (C) <2007> Leandro Melo de Sales <leandroal@gmail.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
Sebastian Drögee6513c12013-07-14 12:12:42 +020016 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
Olivier Naudanb28313f2012-04-16 08:10:18 -040018 */
19
20/**
21 * SECTION:element-dccpserversink
22 * @see_also: dccpclientsink, dccpclientsrc, dccpserversrc
23 *
24 * This element wait for connections from clients and send data to them.
25 * <ulink url="http://www.linuxfoundation.org/en/Net:DCCP">DCCP</ulink> (Datagram
26 * Congestion Control Protocol) is a Transport Layer protocol like
27 * TCP and UDP.
28 *
29 * <refsect2>
30 * <title>Example pipeline</title>
31 * <para>
32 * |[
33 * gst-launch -v dccpclientsrc host=localhost port=9011 ccid=2 ! decodebin ! alsasink
34 * ]| Client
35 * |[
36 * gst-launch -v filesrc location=music.mp3 ! mp3parse ! dccpserversink port=9011 ccid=2
37 * ]| Server
38 *
39 * This example pipeline will send a MP3 stream to the client using DCCP.
40 * The client will decode the MP3 and play it. Run the server pipeline
41 * first than the client pipeline. If you want, you can run more than one dccpclientsrc
42 * to connect to the same server (see wait-connections property at dccpserversink).
43 * </para>
44 * </refsect2>
45 */
46
47
48#ifdef HAVE_CONFIG_H
49#include "config.h"
50#endif
51
52#include "gstdccpserversink.h"
53#include "gstdccp.h"
54#include <fcntl.h>
55
56/* signals */
57enum
58{
59 SIGNAL_CONNECTED,
60 LAST_SIGNAL
61};
62
63/* properties */
64enum
65{
66 PROP_0,
67 PROP_PORT,
68 PROP_CLIENT_SOCK_FD,
69 PROP_CCID,
70 PROP_CLOSED,
71 PROP_WAIT_CONNECTIONS
72};
73
74static pthread_t accept_thread_id;
75
76static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
77static gboolean gst_dccp_server_sink_stop (GstBaseSink * bsink);
78
79GST_DEBUG_CATEGORY_STATIC (dccpserversink_debug);
80
81static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
82 GST_PAD_SINK,
83 GST_PAD_ALWAYS,
84 GST_STATIC_CAPS_ANY);
85
86GST_BOILERPLATE (GstDCCPServerSink, gst_dccp_server_sink, GstBaseSink,
87 GST_TYPE_BASE_SINK);
88
89static guint gst_dccp_server_sink_signals[LAST_SIGNAL] = { 0 };
90
91/*
92 * Create a new client with the socket and the MTU
93 *
94 * @param element - the gstdccpserversink instance
95 * @param socket - the client socket
96 * @return the client
97 */
98static Client *
99gst_dccp_server_create_client (GstElement * element, int socket)
100{
101 Client *client = (Client *) g_malloc (sizeof (Client));
102 client->socket = socket;
103 client->pksize = gst_dccp_get_max_packet_size (element, client->socket);
104 client->flow_status = GST_FLOW_OK;
105
106 GST_DEBUG_OBJECT (element, "Creating a new client with fd %d and MTU %d.",
107 client->socket, client->pksize);
108
109 /* the socket is connected */
110 g_signal_emit (element, gst_dccp_server_sink_signals[SIGNAL_CONNECTED], 0,
111 socket);
112
113 return client;
114}
115
116/*
117 * Wait connections of new clients
118 *
119 * @param arg - the gstdccpserversink instance
120 */
121static void *
122gst_dccp_server_accept_new_clients (void *arg)
123{
124 GstDCCPServerSink *sink = (GstDCCPServerSink *) arg;
125 int newsockfd;
126 Client *client;
127
128 while (1) {
129 newsockfd =
130 gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);
131
132 client = gst_dccp_server_create_client (GST_ELEMENT (sink), newsockfd);
133
134 pthread_mutex_lock (&lock);
135 sink->clients = g_list_append (sink->clients, client);
136 pthread_mutex_unlock (&lock);
137 }
138
139 return NULL;
140}
141
142/*
143 * Send the buffer to a client
144 *
145 * @param arg - the client
146 */
147static void *
148gst_dccp_server_send_buffer (void *arg)
149{
150 Client *client = (Client *) arg;
151 GstDCCPServerSink *sink = client->server;
152 GstBuffer *buf = client->buf;
153 int client_sock_fd = client->socket;
154 int pksize = client->pksize;
155
156 if (gst_dccp_send_buffer (GST_ELEMENT (sink), buf, client_sock_fd,
157 pksize) == GST_FLOW_ERROR) {
158 client->flow_status = GST_FLOW_ERROR;
159 }
160 return NULL;
161}
162
163/* Remove clients with problems to send.
164 *
165 * @param arg - the gstdccpserversink instance
166 */
167static void *
168gst_dccp_server_delete_dead_clients (void *arg)
169{
170 GstDCCPServerSink *sink = (GstDCCPServerSink *) arg;
171 GList *tmp = NULL;
172 GList *l;
173
174 pthread_mutex_lock (&lock);
175 for (l = sink->clients; l != NULL; l = l->next) {
176 Client *client = (Client *) l->data;
177
178 if (client->flow_status == GST_FLOW_OK) {
179 tmp = g_list_append (tmp, client);
180 } else {
181 close (client->socket);
182 g_free (client);
183 }
184 }
185 g_list_free (sink->clients);
186 sink->clients = tmp;
187 pthread_mutex_unlock (&lock);
188 return 0;
189}
190
191static void
192gst_dccp_server_sink_init (GstDCCPServerSink * this,
193 GstDCCPServerSinkClass * g_class)
194{
195 this->port = DCCP_DEFAULT_PORT;
196 this->sock_fd = DCCP_DEFAULT_SOCK_FD;
197 this->client_sock_fd = DCCP_DEFAULT_CLIENT_SOCK_FD;
198 this->closed = DCCP_DEFAULT_CLOSED;
199 this->ccid = DCCP_DEFAULT_CCID;
200 this->wait_connections = DCCP_DEFAULT_WAIT_CONNECTIONS;
201 this->clients = NULL;
202}
203
204/*
205 * Starts the element. If the sockfd property was not the default, this method
206 * will wait for a client connection. If wait-connections property is true, it
207 * creates a thread to wait for new client connections.
208 *
209 * @param bsink - the element
210 * @return TRUE if the send operation was successful, FALSE otherwise.
211 */
212static gboolean
213gst_dccp_server_sink_start (GstBaseSink * bsink)
214{
215 GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);
216 Client *client;
217
218 if ((sink->sock_fd = gst_dccp_create_new_socket (GST_ELEMENT (sink))) < 0) {
219 return FALSE;
220 }
221
222 if (!gst_dccp_make_address_reusable (GST_ELEMENT (sink), sink->sock_fd)) {
223 return FALSE;
224 }
225
226 /* name the server socket */
227 memset (&sink->server_sin, 0, sizeof (sink->server_sin));
228 sink->server_sin.sin_family = AF_INET; /* network socket */
229 sink->server_sin.sin_port = htons (sink->port); /* on port */
230 sink->server_sin.sin_addr.s_addr = htonl (INADDR_ANY); /* for hosts */
231
232 if (!gst_dccp_bind_server_socket (GST_ELEMENT (sink), sink->sock_fd,
233 sink->server_sin)) {
234 return FALSE;
235 }
236
237 if (!gst_dccp_set_ccid (GST_ELEMENT (sink), sink->sock_fd, sink->ccid)) {
238 return FALSE;
239 }
240
241 if (!gst_dccp_listen_server_socket (GST_ELEMENT (sink), sink->sock_fd)) {
242 return FALSE;
243 }
244
245
246 if (sink->client_sock_fd == DCCP_DEFAULT_CLIENT_SOCK_FD) {
247 sink->client_sock_fd =
248 gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);
249 }
250
251 if (sink->client_sock_fd == -1) {
252 return FALSE;
253 }
254
255 client =
256 gst_dccp_server_create_client (GST_ELEMENT (sink), sink->client_sock_fd);
257 sink->clients = g_list_append (sink->clients, client);
258
259 pthread_mutex_init (&lock, NULL);
260
261 if (sink->wait_connections == TRUE) {
262 pthread_create (&accept_thread_id, NULL, gst_dccp_server_accept_new_clients,
263 sink);
264 pthread_detach (accept_thread_id);
265 }
266
267 return TRUE;
268}
269
270static GstFlowReturn
271gst_dccp_server_sink_render (GstBaseSink * bsink, GstBuffer * buf)
272{
273 GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);
274
275 pthread_t thread_id;
276 GList *l;
277
278 pthread_mutex_lock (&lock);
279
280 for (l = sink->clients; l != NULL; l = l->next) {
281 Client *client = (Client *) l->data;
282
283 client->buf = buf;
284 client->server = sink;
285
286 /* FIXME: are we really creating a new thread here for every single buffer
287 * and every single client? */
288 if (client->flow_status == GST_FLOW_OK) {
289 pthread_create (&thread_id, NULL, gst_dccp_server_send_buffer,
290 (void *) client);
291 pthread_detach (thread_id);
292 } else {
293 /* FIXME: what's the point of doing this in a separate thread if it
294 * keeps he global lock anyway while going through all the clients and
295 * waiting for close() to finish? */
296 pthread_create (&thread_id, NULL, gst_dccp_server_delete_dead_clients,
297 (void *) sink);
298 pthread_detach (thread_id);
299 }
300 }
301
302 pthread_mutex_unlock (&lock);
303 return GST_FLOW_OK;
304}
305
306static gboolean
307gst_dccp_server_sink_stop (GstBaseSink * bsink)
308{
309 GstDCCPServerSink *sink;
310 GList *l;
311
312 sink = GST_DCCP_SERVER_SINK (bsink);
313
314 if (sink->wait_connections == TRUE) {
315 pthread_cancel (accept_thread_id);
316 }
317
318 gst_dccp_socket_close (GST_ELEMENT (sink), &(sink->sock_fd));
319
320 pthread_mutex_lock (&lock);
321 for (l = sink->clients; l != NULL; l = l->next) {
322 Client *client = (Client *) l->data;
323
324 if (client->socket != DCCP_DEFAULT_CLIENT_SOCK_FD && sink->closed == TRUE) {
325 gst_dccp_socket_close (GST_ELEMENT (sink), &(client->socket));
326 }
327 g_free (client);
328 }
329 pthread_mutex_unlock (&lock);
330
331 return TRUE;
332}
333
334static void
335gst_dccp_server_sink_base_init (gpointer g_class)
336{
337 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
338
339 gst_element_class_add_pad_template (element_class,
340 gst_static_pad_template_get (&sinktemplate));
341
Sebastian Dröge6a5ec012012-10-25 14:10:09 +0200342 gst_element_class_set_static_metadata (element_class, "DCCP server sink",
Olivier Naudanb28313f2012-04-16 08:10:18 -0400343 "Sink/Network",
344 "Send data as a server over the network via DCCP",
345 "E-Phone Team at Federal University of Campina Grande <leandroal@gmail.com>");
346}
347
348/*
349 * Set the value of a property for the server sink.
350 */
351static void
352gst_dccp_server_sink_set_property (GObject * object, guint prop_id,
353 const GValue * value, GParamSpec * pspec)
354{
355 GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);
356
357 switch (prop_id) {
358 case PROP_PORT:
359 sink->port = g_value_get_int (value);
360 break;
361 case PROP_CLIENT_SOCK_FD:
362 sink->client_sock_fd = g_value_get_int (value);
363 break;
364 case PROP_CLOSED:
365 sink->closed = g_value_get_boolean (value);
366 break;
367 case PROP_WAIT_CONNECTIONS:
368 sink->wait_connections = g_value_get_boolean (value);
369 break;
370 case PROP_CCID:
371 sink->ccid = g_value_get_int (value);
372 break;
373 default:
374 break;
375 }
376}
377
378static void
379gst_dccp_server_sink_get_property (GObject * object, guint prop_id,
380 GValue * value, GParamSpec * pspec)
381{
382 GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);
383
384 switch (prop_id) {
385 case PROP_PORT:
386 g_value_set_int (value, sink->port);
387 break;
388 case PROP_CLIENT_SOCK_FD:
389 g_value_set_int (value, sink->client_sock_fd);
390 break;
391 case PROP_CLOSED:
392 g_value_set_boolean (value, sink->closed);
393 break;
394 case PROP_WAIT_CONNECTIONS:
395 g_value_set_boolean (value, sink->wait_connections);
396 break;
397 case PROP_CCID:
398 g_value_set_int (value, sink->ccid);
399 break;
400 default:
401 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
402 break;
403 }
404}
405
406
407static void
408gst_dccp_server_sink_class_init (GstDCCPServerSinkClass * klass)
409{
410 GObjectClass *gobject_class;
411 GstBaseSinkClass *gstbasesink_class;
412
413 gobject_class = (GObjectClass *) klass;
414 gstbasesink_class = (GstBaseSinkClass *) klass;
415
416 gobject_class->set_property = gst_dccp_server_sink_set_property;
417 gobject_class->get_property = gst_dccp_server_sink_get_property;
418
419 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
420 g_param_spec_int ("port", "Port",
421 "The port to listen to", 0, G_MAXUINT16,
422 DCCP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
423
424 g_object_class_install_property (gobject_class, PROP_CLIENT_SOCK_FD,
425 g_param_spec_int ("sockfd", "Socket fd",
426 "The client socket file descriptor", -1, G_MAXINT,
427 DCCP_DEFAULT_CLIENT_SOCK_FD,
428 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
429
430 g_object_class_install_property (gobject_class, PROP_CLOSED,
431 g_param_spec_boolean ("close-socket", "Close",
432 "Close the client sockets at end of stream",
433 DCCP_DEFAULT_CLOSED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
434
435 g_object_class_install_property (gobject_class, PROP_CCID,
436 g_param_spec_int ("ccid", "CCID",
437 "The Congestion Control IDentified to be used", 2, G_MAXINT,
438 DCCP_DEFAULT_CCID, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
439
440 g_object_class_install_property (gobject_class, PROP_WAIT_CONNECTIONS,
441 g_param_spec_boolean ("wait-connections", "Wait connections",
442 "Wait for many client connections",
443 DCCP_DEFAULT_WAIT_CONNECTIONS,
444 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
445
446
447 /* signals */
448 /**
449 * GstDccpServerSink::connected:
450 * @sink: the gstdccpserversink element that emitted this signal
451 * @fd: the connected socket file descriptor
452 *
453 * Reports that the element has connected, giving the fd of the socket
454 */
455 gst_dccp_server_sink_signals[SIGNAL_CONNECTED] =
456 g_signal_new ("connected", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
457 G_STRUCT_OFFSET (GstDCCPServerSinkClass, connected), NULL, NULL,
458 gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
459
460 gstbasesink_class->start = gst_dccp_server_sink_start;
461 gstbasesink_class->stop = gst_dccp_server_sink_stop;
462 gstbasesink_class->render = gst_dccp_server_sink_render;
463
464 GST_DEBUG_CATEGORY_INIT (dccpserversink_debug, "dccpserversink", 0,
465 "DCCP Server Sink");
466}