/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) <2004> Thomas Vander Stichele * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:tcpserversink * @short_description: a sink that acts as a TCP server and sends data to * multiple clients * @see_also: #multifdsink */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #ifdef HAVE_FIONREAD_IN_SYS_FILIO #include #endif #include "gsttcp.h" #include "gsttcpserversink.h" #include "gsttcp-marshal.h" #define TCP_BACKLOG 5 /* elementfactory information */ static GstElementDetails gst_tcpserversink_details = GST_ELEMENT_DETAILS ("TCP Server sink", "Sink/Network", "Send data as a server over the network via TCP", "Thomas Vander Stichele "); GST_DEBUG_CATEGORY (tcpserversink_debug); #define GST_CAT_DEFAULT (tcpserversink_debug) enum { ARG_0, ARG_HOST, ARG_PORT, }; static void gst_tcpserversink_base_init (gpointer g_class); static void gst_tcpserversink_class_init (GstTCPServerSink * klass); static void gst_tcpserversink_init (GstTCPServerSink * tcpserversink); static void gst_tcpserversink_finalize (GObject * gobject); static gboolean gst_tcpserversink_handle_wait (GstMultiFdSink * sink, GstFDSet * set); static gboolean gst_tcpserversink_init_send (GstMultiFdSink * this); static gboolean gst_tcpserversink_close (GstMultiFdSink * this); static void gst_tcpserversink_removed (GstMultiFdSink * sink, int fd); static void gst_tcpserversink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_tcpserversink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstMultiFdSinkClass *parent_class = NULL; GType gst_tcpserversink_get_type (void) { static GType tcpserversink_type = 0; if (!tcpserversink_type) { static const GTypeInfo tcpserversink_info = { sizeof (GstTCPServerSinkClass), gst_tcpserversink_base_init, NULL, (GClassInitFunc) gst_tcpserversink_class_init, NULL, NULL, sizeof (GstTCPServerSink), 0, (GInstanceInitFunc) gst_tcpserversink_init, NULL }; tcpserversink_type = g_type_register_static (GST_TYPE_MULTIFDSINK, "GstTCPServerSink", &tcpserversink_info, 0); } return tcpserversink_type; } static void gst_tcpserversink_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (element_class, &gst_tcpserversink_details); } static void gst_tcpserversink_class_init (GstTCPServerSink * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstMultiFdSinkClass *gstmultifdsink_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstmultifdsink_class = (GstMultiFdSinkClass *) klass; parent_class = g_type_class_ref (GST_TYPE_MULTIFDSINK); gobject_class->set_property = gst_tcpserversink_set_property; gobject_class->get_property = gst_tcpserversink_get_property; gobject_class->finalize = gst_tcpserversink_finalize; g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HOST, g_param_spec_string ("host", "host", "The host/IP to send the packets to", TCP_DEFAULT_HOST, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PORT, g_param_spec_int ("port", "port", "The port to send the packets to", 0, TCP_HIGHEST_PORT, TCP_DEFAULT_PORT, G_PARAM_READWRITE)); gstmultifdsink_class->init = gst_tcpserversink_init_send; gstmultifdsink_class->wait = gst_tcpserversink_handle_wait; gstmultifdsink_class->close = gst_tcpserversink_close; gstmultifdsink_class->removed = gst_tcpserversink_removed; GST_DEBUG_CATEGORY_INIT (tcpserversink_debug, "tcpserversink", 0, "TCP sink"); } static void gst_tcpserversink_init (GstTCPServerSink * this) { this->server_port = TCP_DEFAULT_PORT; /* should support as minimum 576 for IPV4 and 1500 for IPV6 */ /* this->mtu = 1500; */ this->host = g_strdup (TCP_DEFAULT_HOST); this->server_sock.fd = -1; } static void gst_tcpserversink_finalize (GObject * gobject) { GstTCPServerSink *this = GST_TCPSERVERSINK (gobject); g_free (this->host); } /* handle a read request on the server, * which indicates a new client connection */ static gboolean gst_tcpserversink_handle_server_read (GstTCPServerSink * sink) { /* new client */ int client_sock_fd; struct sockaddr_in client_address; unsigned int client_address_len; /* For some stupid reason, client_address and client_address_len has to be * zeroed */ memset (&client_address, 0, sizeof (client_address)); client_address_len = 0; client_sock_fd = accept (sink->server_sock.fd, (struct sockaddr *) &client_address, &client_address_len); if (client_sock_fd == -1) { GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, (NULL), ("Could not accept client on server socket %d: %s (%d)", sink->server_sock.fd, g_strerror (errno), errno)); return FALSE; } gst_multifdsink_add (GST_MULTIFDSINK (sink), client_sock_fd); GST_DEBUG_OBJECT (sink, "added new client ip %s with fd %d", inet_ntoa (client_address.sin_addr), client_sock_fd); return TRUE; } static void gst_tcpserversink_removed (GstMultiFdSink * sink, int fd) { GstTCPServerSink *this = GST_TCPSERVERSINK (sink); GST_LOG_OBJECT (this, "closing fd %d", fd); if (close (fd) < 0) { GST_WARNING_OBJECT (this, "error closing fd %d: %s", fd, g_strerror (errno)); } } static gboolean gst_tcpserversink_handle_wait (GstMultiFdSink * sink, GstFDSet * set) { GstTCPServerSink *this = GST_TCPSERVERSINK (sink); if (gst_fdset_fd_can_read (set, &this->server_sock)) { /* handle new client connection on server socket */ if (!gst_tcpserversink_handle_server_read (this)) { GST_ELEMENT_ERROR (this, RESOURCE, READ, (NULL), ("client connection failed: %s", g_strerror (errno))); return FALSE; } } return TRUE; } static void gst_tcpserversink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstTCPServerSink *sink; g_return_if_fail (GST_IS_TCPSERVERSINK (object)); sink = GST_TCPSERVERSINK (object); switch (prop_id) { case ARG_HOST: if (!g_value_get_string (value)) { g_warning ("host property cannot be NULL"); break; } g_free (sink->host); sink->host = g_strdup (g_value_get_string (value)); break; case ARG_PORT: sink->server_port = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_tcpserversink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstTCPServerSink *sink; g_return_if_fail (GST_IS_TCPSERVERSINK (object)); sink = GST_TCPSERVERSINK (object); switch (prop_id) { case ARG_HOST: g_value_set_string (value, sink->host); break; case ARG_PORT: g_value_set_int (value, sink->server_port); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* create a socket for sending to remote machine */ static gboolean gst_tcpserversink_init_send (GstMultiFdSink * parent) { int ret; GstTCPServerSink *this = GST_TCPSERVERSINK (parent); /* create sending server socket */ if ((this->server_sock.fd = socket (AF_INET, SOCK_STREAM, 0)) == -1) { GST_ELEMENT_ERROR (this, RESOURCE, OPEN_WRITE, (NULL), GST_ERROR_SYSTEM); return FALSE; } GST_DEBUG_OBJECT (this, "opened sending server socket with fd %d", this->server_sock.fd); /* make address reusable */ ret = 1; if (setsockopt (this->server_sock.fd, SOL_SOCKET, SO_REUSEADDR, (void *) &ret, sizeof (ret)) < 0) { gst_tcp_socket_close (&this->server_sock.fd); GST_ELEMENT_ERROR (this, RESOURCE, SETTINGS, (NULL), ("Could not setsockopt: %s", g_strerror (errno))); return FALSE; } /* keep connection alive; avoids SIGPIPE during write */ ret = 1; if (setsockopt (this->server_sock.fd, SOL_SOCKET, SO_KEEPALIVE, (void *) &ret, sizeof (ret)) < 0) { gst_tcp_socket_close (&this->server_sock.fd); GST_ELEMENT_ERROR (this, RESOURCE, SETTINGS, (NULL), ("Could not setsockopt: %s", g_strerror (errno))); return FALSE; } /* name the socket */ memset (&this->server_sin, 0, sizeof (this->server_sin)); this->server_sin.sin_family = AF_INET; /* network socket */ this->server_sin.sin_port = htons (this->server_port); /* on port */ this->server_sin.sin_addr.s_addr = htonl (INADDR_ANY); /* for hosts */ /* bind it */ GST_DEBUG_OBJECT (this, "binding server socket to address"); ret = bind (this->server_sock.fd, (struct sockaddr *) &this->server_sin, sizeof (this->server_sin)); if (ret) { gst_tcp_socket_close (&this->server_sock.fd); switch (errno) { default: GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL), ("bind on port %d failed: %s", this->server_port, g_strerror (errno))); return FALSE; break; } } /* set the server socket to nonblocking */ fcntl (this->server_sock.fd, F_SETFL, O_NONBLOCK); GST_DEBUG_OBJECT (this, "listening on server socket %d with queue of %d", this->server_sock.fd, TCP_BACKLOG); if (listen (this->server_sock.fd, TCP_BACKLOG) == -1) { gst_tcp_socket_close (&this->server_sock.fd); GST_ELEMENT_ERROR (this, RESOURCE, OPEN_READ, (NULL), ("Could not listen on server socket: %s", g_strerror (errno))); return FALSE; } GST_DEBUG_OBJECT (this, "listened on server socket %d, returning from connection setup", this->server_sock.fd); gst_fdset_add_fd (parent->fdset, &this->server_sock); gst_fdset_fd_ctl_read (parent->fdset, &this->server_sock, TRUE); return TRUE; } static gboolean gst_tcpserversink_close (GstMultiFdSink * parent) { GstTCPServerSink *this = GST_TCPSERVERSINK (parent); if (this->server_sock.fd != -1) { gst_fdset_remove_fd (parent->fdset, &this->server_sock); close (this->server_sock.fd); this->server_sock.fd = -1; } return TRUE; }