/* GStreamer * Copyright (C) <2007> Leandro Melo de Sales * * 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. * DCCP (Datagram * Congestion Control Protocol) is a Transport Layer protocol like * TCP and UDP. * * * Example pipeline * * |[ * 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). * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstdccpserversink.h" #include "gstdccp.h" #include /* 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 "); } /* * 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"); }