gst/dccp/gstdccpserversink.c - mtk-gst-plugins-bad-debian - Git at Google

 /* GStreamer
  * Copyright (C) <2007> Leandro Melo de Sales <leandroal@gmail.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:element-dccpserversink
  * @see_also: dccpclientsink, dccpclientsrc, dccpserversrc
  *
  * This element wait for connections from clients and send data to them.
  * <ulink url="http://www.linuxfoundation.org/en/Net:DCCP">DCCP</ulink> (Datagram
  * Congestion Control Protocol) is a Transport Layer protocol like
  * TCP and UDP.
  *
  * <refsect2>
  * <title>Example pipeline</title>
  * <para>
  * |[
  * gst-launch -v dccpclientsrc host=localhost port=9011 ccid=2 ! decodebin ! alsasink
  * ]| Client
  * |[
  * gst-launch -v filesrc location=music.mp3 ! mp3parse ! dccpserversink port=9011 ccid=2
  * ]| Server
  *
  * This example pipeline will send a MP3 stream to the client using DCCP.
  * The client will decode the MP3 and play it. Run the server pipeline
  * first than the client pipeline. If you want, you can run more than one dccpclientsrc
  * to connect to the same server (see wait-connections property at dccpserversink).
  * </para>
  * </refsect2>
  */


 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 #include "gstdccpserversink.h"
 #include "gstdccp.h"
 #include <fcntl.h>

 /* signals */
 enum
 {
   SIGNAL_CONNECTED,
   LAST_SIGNAL
 };

 /* properties */
 enum
 {
   PROP_0,
   PROP_PORT,
   PROP_CLIENT_SOCK_FD,
   PROP_CCID,
   PROP_CLOSED,
   PROP_WAIT_CONNECTIONS
 };

 static pthread_t accept_thread_id;

 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
 static gboolean gst_dccp_server_sink_stop (GstBaseSink * bsink);

 GST_DEBUG_CATEGORY_STATIC (dccpserversink_debug);

 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);

 GST_BOILERPLATE (GstDCCPServerSink, gst_dccp_server_sink, GstBaseSink,
     GST_TYPE_BASE_SINK);

 static guint gst_dccp_server_sink_signals[LAST_SIGNAL] = { 0 };

 /*
  * Create a new client with the socket and the MTU
  *
  * @param element - the gstdccpserversink instance
  * @param socket - the client socket
  * @return the client
  */
 static Client *
 gst_dccp_server_create_client (GstElement * element, int socket)
 {
   Client *client = (Client *) g_malloc (sizeof (Client));
   client->socket = socket;
   client->pksize = gst_dccp_get_max_packet_size (element, client->socket);
   client->flow_status = GST_FLOW_OK;

   GST_DEBUG_OBJECT (element, "Creating a new client with fd %d and MTU %d.",
       client->socket, client->pksize);

   /* the socket is connected */
   g_signal_emit (element, gst_dccp_server_sink_signals[SIGNAL_CONNECTED], 0,
       socket);

   return client;
 }

 /*
  * Wait connections of new clients
  *
  * @param arg - the gstdccpserversink instance
  */
 static void *
 gst_dccp_server_accept_new_clients (void *arg)
 {
   GstDCCPServerSink *sink = (GstDCCPServerSink *) arg;
   int newsockfd;
   Client *client;

   while (1) {
     newsockfd =
         gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);

     client = gst_dccp_server_create_client (GST_ELEMENT (sink), newsockfd);

     pthread_mutex_lock (&lock);
     sink->clients = g_list_append (sink->clients, client);
     pthread_mutex_unlock (&lock);
   }

   return NULL;
 }

 /*
  * Send the buffer to a client
  *
  * @param arg - the client
  */
 static void *
 gst_dccp_server_send_buffer (void *arg)
 {
   Client *client = (Client *) arg;
   GstDCCPServerSink *sink = client->server;
   GstBuffer *buf = client->buf;
   int client_sock_fd = client->socket;
   int pksize = client->pksize;

   if (gst_dccp_send_buffer (GST_ELEMENT (sink), buf, client_sock_fd,
           pksize) == GST_FLOW_ERROR) {
     client->flow_status = GST_FLOW_ERROR;
   }
   return NULL;
 }

 /* Remove clients with problems to send.
  *
  * @param arg - the gstdccpserversink instance
  */
 static void *
 gst_dccp_server_delete_dead_clients (void *arg)
 {
   GstDCCPServerSink *sink = (GstDCCPServerSink *) arg;
   GList *tmp = NULL;
   GList *l;

   pthread_mutex_lock (&lock);
   for (l = sink->clients; l != NULL; l = l->next) {
     Client *client = (Client *) l->data;

     if (client->flow_status == GST_FLOW_OK) {
       tmp = g_list_append (tmp, client);
     } else {
       close (client->socket);
       g_free (client);
     }
   }
   g_list_free (sink->clients);
   sink->clients = tmp;
   pthread_mutex_unlock (&lock);
   return 0;
 }

 static void
 gst_dccp_server_sink_init (GstDCCPServerSink * this,
     GstDCCPServerSinkClass * g_class)
 {
   this->port = DCCP_DEFAULT_PORT;
   this->sock_fd = DCCP_DEFAULT_SOCK_FD;
   this->client_sock_fd = DCCP_DEFAULT_CLIENT_SOCK_FD;
   this->closed = DCCP_DEFAULT_CLOSED;
   this->ccid = DCCP_DEFAULT_CCID;
   this->wait_connections = DCCP_DEFAULT_WAIT_CONNECTIONS;
   this->clients = NULL;
 }

 /*
  * Starts the element. If the sockfd property was not the default, this method
  * will wait for a client connection.  If wait-connections property is true, it
  * creates a thread to wait for new client connections.
  *
  * @param bsink - the element
  * @return TRUE if the send operation was successful, FALSE otherwise.
  */
 static gboolean
 gst_dccp_server_sink_start (GstBaseSink * bsink)
 {
   GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);
   Client *client;

   if ((sink->sock_fd = gst_dccp_create_new_socket (GST_ELEMENT (sink))) < 0) {
     return FALSE;
   }

   if (!gst_dccp_make_address_reusable (GST_ELEMENT (sink), sink->sock_fd)) {
     return FALSE;
   }

   /* name the server socket */
   memset (&sink->server_sin, 0, sizeof (sink->server_sin));
   sink->server_sin.sin_family = AF_INET;        /* network socket */
   sink->server_sin.sin_port = htons (sink->port);       /* on port */
   sink->server_sin.sin_addr.s_addr = htonl (INADDR_ANY);        /* for hosts */

   if (!gst_dccp_bind_server_socket (GST_ELEMENT (sink), sink->sock_fd,
           sink->server_sin)) {
     return FALSE;
   }

   if (!gst_dccp_set_ccid (GST_ELEMENT (sink), sink->sock_fd, sink->ccid)) {
     return FALSE;
   }

   if (!gst_dccp_listen_server_socket (GST_ELEMENT (sink), sink->sock_fd)) {
     return FALSE;
   }


   if (sink->client_sock_fd == DCCP_DEFAULT_CLIENT_SOCK_FD) {
     sink->client_sock_fd =
         gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);
   }

   if (sink->client_sock_fd == -1) {
     return FALSE;
   }

   client =
       gst_dccp_server_create_client (GST_ELEMENT (sink), sink->client_sock_fd);
   sink->clients = g_list_append (sink->clients, client);

   pthread_mutex_init (&lock, NULL);

   if (sink->wait_connections == TRUE) {
     pthread_create (&accept_thread_id, NULL, gst_dccp_server_accept_new_clients,
         sink);
     pthread_detach (accept_thread_id);
   }

   return TRUE;
 }

 static GstFlowReturn
 gst_dccp_server_sink_render (GstBaseSink * bsink, GstBuffer * buf)
 {
   GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);

   pthread_t thread_id;
   GList *l;

   pthread_mutex_lock (&lock);

   for (l = sink->clients; l != NULL; l = l->next) {
     Client *client = (Client *) l->data;

     client->buf = buf;
     client->server = sink;

     /* FIXME: are we really creating a new thread here for every single buffer
      * and every single client? */
     if (client->flow_status == GST_FLOW_OK) {
       pthread_create (&thread_id, NULL, gst_dccp_server_send_buffer,
           (void *) client);
       pthread_detach (thread_id);
     } else {
       /* FIXME: what's the point of doing this in a separate thread if it
        * keeps he global lock anyway while going through all the clients and
        * waiting for close() to finish? */
       pthread_create (&thread_id, NULL, gst_dccp_server_delete_dead_clients,
           (void *) sink);
       pthread_detach (thread_id);
     }
   }

   pthread_mutex_unlock (&lock);
   return GST_FLOW_OK;
 }

 static gboolean
 gst_dccp_server_sink_stop (GstBaseSink * bsink)
 {
   GstDCCPServerSink *sink;
   GList *l;

   sink = GST_DCCP_SERVER_SINK (bsink);

   if (sink->wait_connections == TRUE) {
     pthread_cancel (accept_thread_id);
   }

   gst_dccp_socket_close (GST_ELEMENT (sink), &(sink->sock_fd));

   pthread_mutex_lock (&lock);
   for (l = sink->clients; l != NULL; l = l->next) {
     Client *client = (Client *) l->data;

     if (client->socket != DCCP_DEFAULT_CLIENT_SOCK_FD && sink->closed == TRUE) {
       gst_dccp_socket_close (GST_ELEMENT (sink), &(client->socket));
     }
     g_free (client);
   }
   pthread_mutex_unlock (&lock);

   return TRUE;
 }

 static void
 gst_dccp_server_sink_base_init (gpointer g_class)
 {
   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

   gst_element_class_add_static_pad_template (element_class, &sinktemplate);

   gst_element_class_set_static_metadata (element_class, "DCCP server sink",
       "Sink/Network",
       "Send data as a server over the network via DCCP",
       "E-Phone Team at Federal University of Campina Grande <leandroal@gmail.com>");
 }

 /*
  * Set the value of a property for the server sink.
  */
 static void
 gst_dccp_server_sink_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)
 {
   GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);

   switch (prop_id) {
     case PROP_PORT:
       sink->port = g_value_get_int (value);
       break;
     case PROP_CLIENT_SOCK_FD:
       sink->client_sock_fd = g_value_get_int (value);
       break;
     case PROP_CLOSED:
       sink->closed = g_value_get_boolean (value);
       break;
     case PROP_WAIT_CONNECTIONS:
       sink->wait_connections = g_value_get_boolean (value);
       break;
     case PROP_CCID:
       sink->ccid = g_value_get_int (value);
       break;
     default:
       break;
   }
 }

 static void
 gst_dccp_server_sink_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec)
 {
   GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);

   switch (prop_id) {
     case PROP_PORT:
       g_value_set_int (value, sink->port);
       break;
     case PROP_CLIENT_SOCK_FD:
       g_value_set_int (value, sink->client_sock_fd);
       break;
     case PROP_CLOSED:
       g_value_set_boolean (value, sink->closed);
       break;
     case PROP_WAIT_CONNECTIONS:
       g_value_set_boolean (value, sink->wait_connections);
       break;
     case PROP_CCID:
       g_value_set_int (value, sink->ccid);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }


 static void
 gst_dccp_server_sink_class_init (GstDCCPServerSinkClass * klass)
 {
   GObjectClass *gobject_class;
   GstBaseSinkClass *gstbasesink_class;

   gobject_class = (GObjectClass *) klass;
   gstbasesink_class = (GstBaseSinkClass *) klass;

   gobject_class->set_property = gst_dccp_server_sink_set_property;
   gobject_class->get_property = gst_dccp_server_sink_get_property;

   g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
       g_param_spec_int ("port", "Port",
           "The port to listen to", 0, G_MAXUINT16,
           DCCP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_CLIENT_SOCK_FD,
       g_param_spec_int ("sockfd", "Socket fd",
           "The client socket file descriptor", -1, G_MAXINT,
           DCCP_DEFAULT_CLIENT_SOCK_FD,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_CLOSED,
       g_param_spec_boolean ("close-socket", "Close",
           "Close the client sockets at end of stream",
           DCCP_DEFAULT_CLOSED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_CCID,
       g_param_spec_int ("ccid", "CCID",
           "The Congestion Control IDentified to be used", 2, G_MAXINT,
           DCCP_DEFAULT_CCID, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_WAIT_CONNECTIONS,
       g_param_spec_boolean ("wait-connections", "Wait connections",
           "Wait for many client connections",
           DCCP_DEFAULT_WAIT_CONNECTIONS,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));


   /* signals */
   /**
    * GstDccpServerSink::connected:
    * @sink: the gstdccpserversink element that emitted this signal
    * @fd: the connected socket file descriptor
    *
    * Reports that the element has connected, giving the fd of the socket
    */
   gst_dccp_server_sink_signals[SIGNAL_CONNECTED] =
       g_signal_new ("connected", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
       G_STRUCT_OFFSET (GstDCCPServerSinkClass, connected), NULL, NULL,
       gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);

   gstbasesink_class->start = gst_dccp_server_sink_start;
   gstbasesink_class->stop = gst_dccp_server_sink_stop;
   gstbasesink_class->render = gst_dccp_server_sink_render;

   GST_DEBUG_CATEGORY_INIT (dccpserversink_debug, "dccpserversink", 0,
       "DCCP Server Sink");
 }
	/* GStreamer
	* Copyright (C) <2007> Leandro Melo de Sales <leandroal@gmail.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:element-dccpserversink
	* @see_also: dccpclientsink, dccpclientsrc, dccpserversrc
	*
	* This element wait for connections from clients and send data to them.
	* <ulink url="http://www.linuxfoundation.org/en/Net:DCCP">DCCP</ulink> (Datagram
	* Congestion Control Protocol) is a Transport Layer protocol like
	* TCP and UDP.
	*
	* <refsect2>
	* <title>Example pipeline</title>
	* <para>
	* \|[
	* gst-launch -v dccpclientsrc host=localhost port=9011 ccid=2 ! decodebin ! alsasink
	* ]\| Client
	* \|[
	* gst-launch -v filesrc location=music.mp3 ! mp3parse ! dccpserversink port=9011 ccid=2
	* ]\| Server
	*
	* This example pipeline will send a MP3 stream to the client using DCCP.
	* The client will decode the MP3 and play it. Run the server pipeline
	* first than the client pipeline. If you want, you can run more than one dccpclientsrc
	* to connect to the same server (see wait-connections property at dccpserversink).
	* </para>
	* </refsect2>
	*/


	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include "gstdccpserversink.h"
	#include "gstdccp.h"
	#include <fcntl.h>

	/* signals */
	enum
	{
	SIGNAL_CONNECTED,
	LAST_SIGNAL
	};

	/* properties */
	enum
	{
	PROP_0,
	PROP_PORT,
	PROP_CLIENT_SOCK_FD,
	PROP_CCID,
	PROP_CLOSED,
	PROP_WAIT_CONNECTIONS
	};

	static pthread_t accept_thread_id;

	static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
	static gboolean gst_dccp_server_sink_stop (GstBaseSink * bsink);

	GST_DEBUG_CATEGORY_STATIC (dccpserversink_debug);

	static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS_ANY);

	GST_BOILERPLATE (GstDCCPServerSink, gst_dccp_server_sink, GstBaseSink,
	GST_TYPE_BASE_SINK);

	static guint gst_dccp_server_sink_signals[LAST_SIGNAL] = { 0 };

	/*
	* Create a new client with the socket and the MTU
	*
	* @param element - the gstdccpserversink instance
	* @param socket - the client socket
	* @return the client
	*/
	static Client *
	gst_dccp_server_create_client (GstElement * element, int socket)
	{
	Client client = (Client ) g_malloc (sizeof (Client));
	client->socket = socket;
	client->pksize = gst_dccp_get_max_packet_size (element, client->socket);
	client->flow_status = GST_FLOW_OK;

	GST_DEBUG_OBJECT (element, "Creating a new client with fd %d and MTU %d.",
	client->socket, client->pksize);

	/* the socket is connected */
	g_signal_emit (element, gst_dccp_server_sink_signals[SIGNAL_CONNECTED], 0,
	socket);

	return client;
	}

	/*
	* Wait connections of new clients
	*
	* @param arg - the gstdccpserversink instance
	*/
	static void *
	gst_dccp_server_accept_new_clients (void *arg)
	{
	GstDCCPServerSink sink = (GstDCCPServerSink ) arg;
	int newsockfd;
	Client *client;

	while (1) {
	newsockfd =
	gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);

	client = gst_dccp_server_create_client (GST_ELEMENT (sink), newsockfd);

	pthread_mutex_lock (&lock);
	sink->clients = g_list_append (sink->clients, client);
	pthread_mutex_unlock (&lock);
	}

	return NULL;
	}

	/*
	* Send the buffer to a client
	*
	* @param arg - the client
	*/
	static void *
	gst_dccp_server_send_buffer (void *arg)
	{
	Client client = (Client ) arg;
	GstDCCPServerSink *sink = client->server;
	GstBuffer *buf = client->buf;
	int client_sock_fd = client->socket;
	int pksize = client->pksize;

	if (gst_dccp_send_buffer (GST_ELEMENT (sink), buf, client_sock_fd,
	pksize) == GST_FLOW_ERROR) {
	client->flow_status = GST_FLOW_ERROR;
	}
	return NULL;
	}

	/* Remove clients with problems to send.
	*
	* @param arg - the gstdccpserversink instance
	*/
	static void *
	gst_dccp_server_delete_dead_clients (void *arg)
	{
	GstDCCPServerSink sink = (GstDCCPServerSink ) arg;
	GList *tmp = NULL;
	GList *l;

	pthread_mutex_lock (&lock);
	for (l = sink->clients; l != NULL; l = l->next) {
	Client client = (Client ) l->data;

	if (client->flow_status == GST_FLOW_OK) {
	tmp = g_list_append (tmp, client);
	} else {
	close (client->socket);
	g_free (client);
	}
	}
	g_list_free (sink->clients);
	sink->clients = tmp;
	pthread_mutex_unlock (&lock);
	return 0;
	}

	static void
	gst_dccp_server_sink_init (GstDCCPServerSink * this,
	GstDCCPServerSinkClass * g_class)
	{
	this->port = DCCP_DEFAULT_PORT;
	this->sock_fd = DCCP_DEFAULT_SOCK_FD;
	this->client_sock_fd = DCCP_DEFAULT_CLIENT_SOCK_FD;
	this->closed = DCCP_DEFAULT_CLOSED;
	this->ccid = DCCP_DEFAULT_CCID;
	this->wait_connections = DCCP_DEFAULT_WAIT_CONNECTIONS;
	this->clients = NULL;
	}

	/*
	* Starts the element. If the sockfd property was not the default, this method
	* will wait for a client connection. If wait-connections property is true, it
	* creates a thread to wait for new client connections.
	*
	* @param bsink - the element
	* @return TRUE if the send operation was successful, FALSE otherwise.
	*/
	static gboolean
	gst_dccp_server_sink_start (GstBaseSink * bsink)
	{
	GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);
	Client *client;

	if ((sink->sock_fd = gst_dccp_create_new_socket (GST_ELEMENT (sink))) < 0) {
	return FALSE;
	}

	if (!gst_dccp_make_address_reusable (GST_ELEMENT (sink), sink->sock_fd)) {
	return FALSE;
	}

	/* name the server socket */
	memset (&sink->server_sin, 0, sizeof (sink->server_sin));
	sink->server_sin.sin_family = AF_INET; /* network socket */
	sink->server_sin.sin_port = htons (sink->port); /* on port */
	sink->server_sin.sin_addr.s_addr = htonl (INADDR_ANY); /* for hosts */

	if (!gst_dccp_bind_server_socket (GST_ELEMENT (sink), sink->sock_fd,
	sink->server_sin)) {
	return FALSE;
	}

	if (!gst_dccp_set_ccid (GST_ELEMENT (sink), sink->sock_fd, sink->ccid)) {
	return FALSE;
	}

	if (!gst_dccp_listen_server_socket (GST_ELEMENT (sink), sink->sock_fd)) {
	return FALSE;
	}


	if (sink->client_sock_fd == DCCP_DEFAULT_CLIENT_SOCK_FD) {
	sink->client_sock_fd =
	gst_dccp_server_wait_connections (GST_ELEMENT (sink), sink->sock_fd);
	}

	if (sink->client_sock_fd == -1) {
	return FALSE;
	}

	client =
	gst_dccp_server_create_client (GST_ELEMENT (sink), sink->client_sock_fd);
	sink->clients = g_list_append (sink->clients, client);

	pthread_mutex_init (&lock, NULL);

	if (sink->wait_connections == TRUE) {
	pthread_create (&accept_thread_id, NULL, gst_dccp_server_accept_new_clients,
	sink);
	pthread_detach (accept_thread_id);
	}

	return TRUE;
	}

	static GstFlowReturn
	gst_dccp_server_sink_render (GstBaseSink * bsink, GstBuffer * buf)
	{
	GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (bsink);

	pthread_t thread_id;
	GList *l;

	pthread_mutex_lock (&lock);

	for (l = sink->clients; l != NULL; l = l->next) {
	Client client = (Client ) l->data;

	client->buf = buf;
	client->server = sink;

	/* FIXME: are we really creating a new thread here for every single buffer
	* and every single client? */
	if (client->flow_status == GST_FLOW_OK) {
	pthread_create (&thread_id, NULL, gst_dccp_server_send_buffer,
	(void *) client);
	pthread_detach (thread_id);
	} else {
	/* FIXME: what's the point of doing this in a separate thread if it
	* keeps he global lock anyway while going through all the clients and
	* waiting for close() to finish? */
	pthread_create (&thread_id, NULL, gst_dccp_server_delete_dead_clients,
	(void *) sink);
	pthread_detach (thread_id);
	}
	}

	pthread_mutex_unlock (&lock);
	return GST_FLOW_OK;
	}

	static gboolean
	gst_dccp_server_sink_stop (GstBaseSink * bsink)
	{
	GstDCCPServerSink *sink;
	GList *l;

	sink = GST_DCCP_SERVER_SINK (bsink);

	if (sink->wait_connections == TRUE) {
	pthread_cancel (accept_thread_id);
	}

	gst_dccp_socket_close (GST_ELEMENT (sink), &(sink->sock_fd));

	pthread_mutex_lock (&lock);
	for (l = sink->clients; l != NULL; l = l->next) {
	Client client = (Client ) l->data;

	if (client->socket != DCCP_DEFAULT_CLIENT_SOCK_FD && sink->closed == TRUE) {
	gst_dccp_socket_close (GST_ELEMENT (sink), &(client->socket));
	}
	g_free (client);
	}
	pthread_mutex_unlock (&lock);

	return TRUE;
	}

	static void
	gst_dccp_server_sink_base_init (gpointer g_class)
	{
	GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

	gst_element_class_add_static_pad_template (element_class, &sinktemplate);

	gst_element_class_set_static_metadata (element_class, "DCCP server sink",
	"Sink/Network",
	"Send data as a server over the network via DCCP",
	"E-Phone Team at Federal University of Campina Grande <leandroal@gmail.com>");
	}

	/*
	* Set the value of a property for the server sink.
	*/
	static void
	gst_dccp_server_sink_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec)
	{
	GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);

	switch (prop_id) {
	case PROP_PORT:
	sink->port = g_value_get_int (value);
	break;
	case PROP_CLIENT_SOCK_FD:
	sink->client_sock_fd = g_value_get_int (value);
	break;
	case PROP_CLOSED:
	sink->closed = g_value_get_boolean (value);
	break;
	case PROP_WAIT_CONNECTIONS:
	sink->wait_connections = g_value_get_boolean (value);
	break;
	case PROP_CCID:
	sink->ccid = g_value_get_int (value);
	break;
	default:
	break;
	}
	}

	static void
	gst_dccp_server_sink_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec)
	{
	GstDCCPServerSink *sink = GST_DCCP_SERVER_SINK (object);

	switch (prop_id) {
	case PROP_PORT:
	g_value_set_int (value, sink->port);
	break;
	case PROP_CLIENT_SOCK_FD:
	g_value_set_int (value, sink->client_sock_fd);
	break;
	case PROP_CLOSED:
	g_value_set_boolean (value, sink->closed);
	break;
	case PROP_WAIT_CONNECTIONS:
	g_value_set_boolean (value, sink->wait_connections);
	break;
	case PROP_CCID:
	g_value_set_int (value, sink->ccid);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}


	static void
	gst_dccp_server_sink_class_init (GstDCCPServerSinkClass * klass)
	{
	GObjectClass *gobject_class;
	GstBaseSinkClass *gstbasesink_class;

	gobject_class = (GObjectClass *) klass;
	gstbasesink_class = (GstBaseSinkClass *) klass;

	gobject_class->set_property = gst_dccp_server_sink_set_property;
	gobject_class->get_property = gst_dccp_server_sink_get_property;

	g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
	g_param_spec_int ("port", "Port",
	"The port to listen to", 0, G_MAXUINT16,
	DCCP_DEFAULT_PORT, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_CLIENT_SOCK_FD,
	g_param_spec_int ("sockfd", "Socket fd",
	"The client socket file descriptor", -1, G_MAXINT,
	DCCP_DEFAULT_CLIENT_SOCK_FD,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_CLOSED,
	g_param_spec_boolean ("close-socket", "Close",
	"Close the client sockets at end of stream",
	DCCP_DEFAULT_CLOSED, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_CCID,
	g_param_spec_int ("ccid", "CCID",
	"The Congestion Control IDentified to be used", 2, G_MAXINT,
	DCCP_DEFAULT_CCID, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_WAIT_CONNECTIONS,
	g_param_spec_boolean ("wait-connections", "Wait connections",
	"Wait for many client connections",
	DCCP_DEFAULT_WAIT_CONNECTIONS,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));


	/* signals */
	/**
	* GstDccpServerSink::connected:
	* @sink: the gstdccpserversink element that emitted this signal
	* @fd: the connected socket file descriptor
	*
	* Reports that the element has connected, giving the fd of the socket
	*/
	gst_dccp_server_sink_signals[SIGNAL_CONNECTED] =
	g_signal_new ("connected", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
	G_STRUCT_OFFSET (GstDCCPServerSinkClass, connected), NULL, NULL,
	gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);

	gstbasesink_class->start = gst_dccp_server_sink_start;
	gstbasesink_class->stop = gst_dccp_server_sink_stop;
	gstbasesink_class->render = gst_dccp_server_sink_render;

	GST_DEBUG_CATEGORY_INIT (dccpserversink_debug, "dccpserversink", 0,
	"DCCP Server Sink");
	}