/* 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:element-tcpclientsrc * @see_also: #tcpclientsink * * * Example launch line * |[ * # server: * nc -l -p 3000 * # client: * gst-launch tcpclientsrc port=3000 ! fdsink fd=2 * ]| everything you type in the server is shown on the client * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gsttcp.h" #include "gsttcpclientsrc.h" #include /* memset */ #include #include #include GST_DEBUG_CATEGORY_STATIC (tcpclientsrc_debug); #define GST_CAT_DEFAULT tcpclientsrc_debug #define MAX_READ_SIZE 4 * 1024 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); enum { PROP_0, PROP_HOST, PROP_PORT }; #define gst_tcp_client_src_parent_class parent_class G_DEFINE_TYPE (GstTCPClientSrc, gst_tcp_client_src, GST_TYPE_PUSH_SRC); static void gst_tcp_client_src_finalize (GObject * gobject); static GstCaps *gst_tcp_client_src_getcaps (GstBaseSrc * psrc, GstCaps * filter); static GstFlowReturn gst_tcp_client_src_create (GstPushSrc * psrc, GstBuffer ** outbuf); static gboolean gst_tcp_client_src_stop (GstBaseSrc * bsrc); static gboolean gst_tcp_client_src_start (GstBaseSrc * bsrc); static gboolean gst_tcp_client_src_unlock (GstBaseSrc * bsrc); static gboolean gst_tcp_client_src_unlock_stop (GstBaseSrc * bsrc); static void gst_tcp_client_src_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_tcp_client_src_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_tcp_client_src_class_init (GstTCPClientSrcClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseSrcClass *gstbasesrc_class; GstPushSrcClass *gstpush_src_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstbasesrc_class = (GstBaseSrcClass *) klass; gstpush_src_class = (GstPushSrcClass *) klass; gobject_class->set_property = gst_tcp_client_src_set_property; gobject_class->get_property = gst_tcp_client_src_get_property; gobject_class->finalize = gst_tcp_client_src_finalize; g_object_class_install_property (gobject_class, PROP_HOST, g_param_spec_string ("host", "Host", "The host IP address to receive packets from", TCP_DEFAULT_HOST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PORT, g_param_spec_int ("port", "Port", "The port to receive packets from", 0, TCP_HIGHEST_PORT, TCP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&srctemplate)); gst_element_class_set_details_simple (gstelement_class, "TCP client source", "Source/Network", "Receive data as a client over the network via TCP", "Thomas Vander Stichele "); gstbasesrc_class->get_caps = gst_tcp_client_src_getcaps; gstbasesrc_class->start = gst_tcp_client_src_start; gstbasesrc_class->stop = gst_tcp_client_src_stop; gstbasesrc_class->unlock = gst_tcp_client_src_unlock; gstbasesrc_class->unlock_stop = gst_tcp_client_src_unlock_stop; gstpush_src_class->create = gst_tcp_client_src_create; GST_DEBUG_CATEGORY_INIT (tcpclientsrc_debug, "tcpclientsrc", 0, "TCP Client Source"); } static void gst_tcp_client_src_init (GstTCPClientSrc * this) { this->port = TCP_DEFAULT_PORT; this->host = g_strdup (TCP_DEFAULT_HOST); this->sock_fd.fd = -1; this->caps = NULL; GST_OBJECT_FLAG_UNSET (this, GST_TCP_CLIENT_SRC_OPEN); } static void gst_tcp_client_src_finalize (GObject * gobject) { GstTCPClientSrc *this = GST_TCP_CLIENT_SRC (gobject); g_free (this->host); G_OBJECT_CLASS (parent_class)->finalize (gobject); } static GstCaps * gst_tcp_client_src_getcaps (GstBaseSrc * bsrc, GstCaps * filter) { GstTCPClientSrc *src; GstCaps *caps = NULL; src = GST_TCP_CLIENT_SRC (bsrc); if (!GST_OBJECT_FLAG_IS_SET (src, GST_TCP_CLIENT_SRC_OPEN)) caps = (filter ? gst_caps_ref (filter) : gst_caps_new_any ()); else if (src->caps && filter) caps = gst_caps_intersect_full (filter, src->caps, GST_CAPS_INTERSECT_FIRST); else if (src->caps) caps = gst_caps_copy (src->caps); else caps = (filter ? gst_caps_ref (filter) : gst_caps_new_any ()); GST_DEBUG_OBJECT (src, "returning caps %" GST_PTR_FORMAT, caps); g_assert (GST_IS_CAPS (caps)); return caps; } static GstFlowReturn gst_tcp_client_src_create (GstPushSrc * psrc, GstBuffer ** outbuf) { GstTCPClientSrc *src; GstFlowReturn ret = GST_FLOW_OK; src = GST_TCP_CLIENT_SRC (psrc); if (!GST_OBJECT_FLAG_IS_SET (src, GST_TCP_CLIENT_SRC_OPEN)) goto wrong_state; GST_LOG_OBJECT (src, "asked for a buffer"); /* read the buffer header */ ret = gst_tcp_read_buffer (GST_ELEMENT (src), src->sock_fd.fd, src->fdset, outbuf); if (ret == GST_FLOW_OK) { GST_LOG_OBJECT (src, "Returning buffer from _get of size %" G_GSIZE_FORMAT ", ts %" GST_TIME_FORMAT ", dur %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT ", offset_end %" G_GINT64_FORMAT, gst_buffer_get_size (*outbuf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (*outbuf)), GST_TIME_ARGS (GST_BUFFER_DURATION (*outbuf)), GST_BUFFER_OFFSET (*outbuf), GST_BUFFER_OFFSET_END (*outbuf)); } return ret; wrong_state: { GST_DEBUG_OBJECT (src, "connection to closed, cannot read data"); return GST_FLOW_WRONG_STATE; } } static void gst_tcp_client_src_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstTCPClientSrc *tcpclientsrc = GST_TCP_CLIENT_SRC (object); switch (prop_id) { case PROP_HOST: if (!g_value_get_string (value)) { g_warning ("host property cannot be NULL"); break; } g_free (tcpclientsrc->host); tcpclientsrc->host = g_strdup (g_value_get_string (value)); break; case PROP_PORT: tcpclientsrc->port = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_tcp_client_src_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstTCPClientSrc *tcpclientsrc = GST_TCP_CLIENT_SRC (object); switch (prop_id) { case PROP_HOST: g_value_set_string (value, tcpclientsrc->host); break; case PROP_PORT: g_value_set_int (value, tcpclientsrc->port); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* create a socket for connecting to remote server */ static gboolean gst_tcp_client_src_start (GstBaseSrc * bsrc) { int ret; gchar *ip; GstTCPClientSrc *src = GST_TCP_CLIENT_SRC (bsrc); if ((src->fdset = gst_poll_new (TRUE)) == NULL) goto socket_pair; /* create receiving client socket */ GST_DEBUG_OBJECT (src, "opening receiving client socket to %s:%d", src->host, src->port); if ((src->sock_fd.fd = socket (AF_INET, SOCK_STREAM, 0)) == -1) goto no_socket; GST_DEBUG_OBJECT (src, "opened receiving client socket with fd %d", src->sock_fd.fd); GST_OBJECT_FLAG_SET (src, GST_TCP_CLIENT_SRC_OPEN); /* look up name if we need to */ if (!(ip = gst_tcp_host_to_ip (GST_ELEMENT (src), src->host))) goto name_resolv; GST_DEBUG_OBJECT (src, "IP address for host %s is %s", src->host, ip); /* connect to server */ memset (&src->server_sin, 0, sizeof (src->server_sin)); src->server_sin.sin_family = AF_INET; /* network socket */ src->server_sin.sin_port = htons (src->port); /* on port */ src->server_sin.sin_addr.s_addr = inet_addr (ip); /* on host ip */ g_free (ip); GST_DEBUG_OBJECT (src, "connecting to server"); ret = connect (src->sock_fd.fd, (struct sockaddr *) &src->server_sin, sizeof (src->server_sin)); if (ret) goto connect_failed; /* add the socket to the poll */ gst_poll_add_fd (src->fdset, &src->sock_fd); gst_poll_fd_ctl_read (src->fdset, &src->sock_fd, TRUE); return TRUE; socket_pair: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL), GST_ERROR_SYSTEM); return FALSE; } no_socket: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), GST_ERROR_SYSTEM); return FALSE; } name_resolv: { gst_tcp_client_src_stop (GST_BASE_SRC (src)); return FALSE; } connect_failed: { gst_tcp_client_src_stop (GST_BASE_SRC (src)); switch (errno) { case ECONNREFUSED: GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (_("Connection to %s:%d refused."), src->host, src->port), (NULL)); break; default: GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), ("connect to %s:%d failed: %s", src->host, src->port, g_strerror (errno))); break; } return FALSE; } } /* close the socket and associated resources * unset OPEN flag * used both to recover from errors and go to NULL state */ static gboolean gst_tcp_client_src_stop (GstBaseSrc * bsrc) { GstTCPClientSrc *src; src = GST_TCP_CLIENT_SRC (bsrc); GST_DEBUG_OBJECT (src, "closing socket"); if (src->fdset != NULL) { gst_poll_free (src->fdset); src->fdset = NULL; } gst_tcp_socket_close (&src->sock_fd); src->caps_received = FALSE; if (src->caps) { gst_caps_unref (src->caps); src->caps = NULL; } GST_OBJECT_FLAG_UNSET (src, GST_TCP_CLIENT_SRC_OPEN); return TRUE; } /* will be called only between calls to start() and stop() */ static gboolean gst_tcp_client_src_unlock (GstBaseSrc * bsrc) { GstTCPClientSrc *src = GST_TCP_CLIENT_SRC (bsrc); GST_DEBUG_OBJECT (src, "set to flushing"); gst_poll_set_flushing (src->fdset, TRUE); return TRUE; } /* will be called only between calls to start() and stop() */ static gboolean gst_tcp_client_src_unlock_stop (GstBaseSrc * bsrc) { GstTCPClientSrc *src = GST_TCP_CLIENT_SRC (bsrc); GST_DEBUG_OBJECT (src, "unset flushing"); gst_poll_set_flushing (src->fdset, FALSE); return TRUE; }