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getaddrinfo errors should be reported with gai_strerror instead of errno as spotted by MikeS.
1063 lines
32 KiB
C
1063 lines
32 KiB
C
/* GStreamer
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* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
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* Copyright (C) <2005> Nokia Corporation <kai.vehmanen@nokia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-udpsrc
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* @see_also: udpsink, multifdsink
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*
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* udpsrc is a network source that reads UDP packets from the network.
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* It can be combined with RTP depayloaders to implement RTP streaming.
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*
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* The udpsrc element supports automatic port allocation by setting the
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* #GstUDPSrc:port property to 0. After setting the udpsrc to PAUSED, the
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* allocated port can be obtained by reading the port property.
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*
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* udpsrc can read from multicast groups by setting the #GstUDPSrc:multicast-group
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* property to the IP address of the multicast group.
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*
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* Alternatively one can provide a custom socket to udpsrc with the #GstUDPSrc:sockfd
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* property, udpsrc will then not allocate a socket itself but use the provided
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* one.
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*
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* The #GstUDPSrc:caps property is mainly used to give a type to the UDP packet
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* so that they can be autoplugged in GStreamer pipelines. This is very usefull
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* for RTP implementations where the contents of the UDP packets is transfered
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* out-of-bounds using SDP or other means.
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*
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* The #GstUDPSrc:buffer property is used to change the default kernel buffer
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* sizes used for receiving packets. The buffer size may be increased for
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* high-volume connections, or may be decreased to limit the possible backlog of
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* incoming data. The system places an absolute limit on these values, on Linux,
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* for example, the default buffer size is typically 50K and can be increased to
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* maximally 100K.
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*
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* The #GstUDPSrc:skip-first-bytes property is used to strip off an arbitrary
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* number of bytes from the start of the raw udp packet and can be used to strip
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* off proprietary header, for example.
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*
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* The udpsrc is always a live source. It does however not provide a #GstClock,
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* this is left for upstream elements such as an RTP session manager or demuxer
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* (such as an MPEG demuxer). As with all live sources, the captured buffers
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* will have their timestamp set to the current running time of the pipeline.
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*
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* udpsrc implements a #GstURIHandler interface that handles udp://host:port
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* type URIs.
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*
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* If the #GstUDPSrc:timeout property is set to a value bigger than 0, udpsrc
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* will generate an element message named
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* <classname>"GstUDPSrcTimeout"</classname>
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* if no data was recieved in the given timeout.
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* The message's structure contains one field:
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* <itemizedlist>
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* <listitem>
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* <para>
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* #guint64
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* <classname>"timeout"</classname>: the timeout in microseconds that
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* expired when waiting for data.
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* </para>
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* </listitem>
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* </itemizedlist>
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* The message is typically used to detect that no UDP arrives in the receiver
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* because it is blocked by a firewall.
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* </para>
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* <para>
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* A custom file descriptor can be configured with the
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* #GstUDPSrc:sockfd property. The socket will be closed when setting the
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* element to READY by default. This behaviour can be
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* overriden with the #GstUDPSrc:closefd property, in which case the application
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* is responsible for closing the file descriptor.
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*
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* <refsect2>
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* <title>Examples</title>
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* |[
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* gst-launch -v udpsrc ! fakesink dump=1
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* ]| A pipeline to read from the default port and dump the udp packets.
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* To actually generate udp packets on the default port one can use the
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* udpsink element. When running the following pipeline in another terminal, the
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* above mentioned pipeline should dump data packets to the console.
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* |[
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* gst-launch -v audiotestsrc ! udpsink
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* ]|
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* |[
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* gst-launch -v udpsrc port=0 ! fakesink
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* ]| read udp packets from a free port.
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* </refsect2>
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*
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* Last reviewed on 2007-09-20 (0.10.7)
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstudpsrc.h"
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdlib.h>
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#if defined _MSC_VER && (_MSC_VER >= 1400)
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#include <io.h>
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#endif
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#include <gst/netbuffer/gstnetbuffer.h>
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#ifdef G_OS_WIN32
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typedef int socklen_t;
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#endif
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#ifdef HAVE_FIONREAD_IN_SYS_FILIO
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#include <sys/filio.h>
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#endif
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GST_DEBUG_CATEGORY_STATIC (udpsrc_debug);
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#define GST_CAT_DEFAULT (udpsrc_debug)
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static const GstElementDetails gst_udpsrc_details =
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GST_ELEMENT_DETAILS ("UDP packet receiver",
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"Source/Network",
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"Receive data over the network via UDP",
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"Wim Taymans <wim@fluendo.com>\n"
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"Thijs Vermeir <thijs.vermeir@barco.com>");
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#define UDP_DEFAULT_PORT 4951
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#define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0"
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#define UDP_DEFAULT_MULTICAST_IFACE NULL
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#define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT)
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#define UDP_DEFAULT_CAPS NULL
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#define UDP_DEFAULT_SOCKFD -1
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#define UDP_DEFAULT_BUFFER_SIZE 0
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#define UDP_DEFAULT_TIMEOUT 0
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#define UDP_DEFAULT_SKIP_FIRST_BYTES 0
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#define UDP_DEFAULT_CLOSEFD TRUE
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#define UDP_DEFAULT_SOCK -1
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#define UDP_DEFAULT_AUTO_MULTICAST TRUE
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enum
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{
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PROP_0,
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PROP_PORT,
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PROP_MULTICAST_GROUP,
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PROP_MULTICAST_IFACE,
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PROP_URI,
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PROP_CAPS,
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PROP_SOCKFD,
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PROP_BUFFER_SIZE,
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PROP_TIMEOUT,
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PROP_SKIP_FIRST_BYTES,
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PROP_CLOSEFD,
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PROP_SOCK,
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PROP_AUTO_MULTICAST,
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PROP_LAST
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};
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#define CLOSE_IF_REQUESTED(udpctx) \
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G_STMT_START { \
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if ((!udpctx->externalfd) || (udpctx->externalfd && udpctx->closefd)) { \
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CLOSE_SOCKET(udpctx->sock.fd); \
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if (udpctx->sock.fd == udpctx->sockfd) \
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udpctx->sockfd = UDP_DEFAULT_SOCKFD; \
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} \
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udpctx->sock.fd = UDP_DEFAULT_SOCK; \
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} G_STMT_END
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static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
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static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src);
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static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf);
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static gboolean gst_udpsrc_start (GstBaseSrc * bsrc);
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static gboolean gst_udpsrc_stop (GstBaseSrc * bsrc);
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static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc);
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static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc);
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static void gst_udpsrc_finalize (GObject * object);
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static void gst_udpsrc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_udpsrc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void
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_do_init (GType type)
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{
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static const GInterfaceInfo urihandler_info = {
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gst_udpsrc_uri_handler_init,
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NULL,
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NULL
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};
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g_type_add_interface_static (type, GST_TYPE_URI_HANDLER, &urihandler_info);
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GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src");
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}
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GST_BOILERPLATE_FULL (GstUDPSrc, gst_udpsrc, GstPushSrc, GST_TYPE_PUSH_SRC,
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_do_init);
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static void
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gst_udpsrc_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_set_details (element_class, &gst_udpsrc_details);
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}
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static void
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gst_udpsrc_class_init (GstUDPSrcClass * klass)
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{
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GObjectClass *gobject_class;
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GstBaseSrcClass *gstbasesrc_class;
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GstPushSrcClass *gstpushsrc_class;
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gobject_class = (GObjectClass *) klass;
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gstbasesrc_class = (GstBaseSrcClass *) klass;
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gstpushsrc_class = (GstPushSrcClass *) klass;
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gobject_class->set_property = gst_udpsrc_set_property;
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gobject_class->get_property = gst_udpsrc_get_property;
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gobject_class->finalize = gst_udpsrc_finalize;
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT,
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g_param_spec_int ("port", "Port",
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"The port to receive the packets from, 0=allocate", 0, G_MAXUINT16,
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UDP_DEFAULT_PORT, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP,
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g_param_spec_string ("multicast-group", "Multicast Group",
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"The Address of multicast group to join", UDP_DEFAULT_MULTICAST_GROUP,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE,
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g_param_spec_string ("multicast-iface", "Multicast Interface",
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"The network interface on which to join the multicast group",
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UDP_DEFAULT_MULTICAST_IFACE, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_URI,
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g_param_spec_string ("uri", "URI",
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"URI in the form of udp://multicast_group:port", UDP_DEFAULT_URI,
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G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_CAPS,
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g_param_spec_boxed ("caps", "Caps",
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"The caps of the source pad", GST_TYPE_CAPS, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_SOCKFD,
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g_param_spec_int ("sockfd", "Socket Handle",
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"Socket to use for UDP reception. (-1 == allocate)",
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-1, G_MAXINT, UDP_DEFAULT_SOCKFD, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE,
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g_param_spec_int ("buffer-size", "Buffer Size",
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"Size of the kernel receive buffer in bytes, 0=default", 0, G_MAXINT,
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UDP_DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT,
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g_param_spec_uint64 ("timeout", "Timeout",
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"Post a message after timeout microseconds (0 = disabled)", 0,
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G_MAXUINT64, UDP_DEFAULT_TIMEOUT, G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_SKIP_FIRST_BYTES, g_param_spec_int ("skip-first-bytes",
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"Skip first bytes", "number of bytes to skip for each udp packet", 0,
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G_MAXINT, UDP_DEFAULT_SKIP_FIRST_BYTES, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_CLOSEFD,
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g_param_spec_boolean ("closefd", "Close sockfd",
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"Close sockfd if passed as property on state change",
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UDP_DEFAULT_CLOSEFD, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_SOCK,
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g_param_spec_int ("sock", "Socket Handle",
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"Socket currently in use for UDP reception. (-1 = no socket)",
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-1, G_MAXINT, UDP_DEFAULT_SOCK, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, PROP_AUTO_MULTICAST,
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g_param_spec_boolean ("auto-multicast", "Auto Multicast",
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"Automatically join/leave multicast groups",
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UDP_DEFAULT_AUTO_MULTICAST, G_PARAM_READWRITE));
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gstbasesrc_class->start = gst_udpsrc_start;
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gstbasesrc_class->stop = gst_udpsrc_stop;
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gstbasesrc_class->unlock = gst_udpsrc_unlock;
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gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop;
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gstbasesrc_class->get_caps = gst_udpsrc_getcaps;
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gstpushsrc_class->create = gst_udpsrc_create;
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}
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static void
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gst_udpsrc_init (GstUDPSrc * udpsrc, GstUDPSrcClass * g_class)
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{
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WSA_STARTUP (udpsrc);
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udpsrc->port = UDP_DEFAULT_PORT;
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udpsrc->sockfd = UDP_DEFAULT_SOCKFD;
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udpsrc->multi_group = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
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udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
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udpsrc->uri = g_strdup (UDP_DEFAULT_URI);
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udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE;
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udpsrc->timeout = UDP_DEFAULT_TIMEOUT;
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udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES;
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udpsrc->closefd = UDP_DEFAULT_CLOSEFD;
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udpsrc->externalfd = (udpsrc->sockfd != -1);
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udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST;
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udpsrc->sock.fd = UDP_DEFAULT_SOCK;
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/* configure basesrc to be a live source */
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gst_base_src_set_live (GST_BASE_SRC (udpsrc), TRUE);
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/* make basesrc output a segment in time */
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gst_base_src_set_format (GST_BASE_SRC (udpsrc), GST_FORMAT_TIME);
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/* make basesrc set timestamps on outgoing buffers based on the running_time
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* when they were captured */
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gst_base_src_set_do_timestamp (GST_BASE_SRC (udpsrc), TRUE);
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}
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static void
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gst_udpsrc_finalize (GObject * object)
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{
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GstUDPSrc *udpsrc;
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udpsrc = GST_UDPSRC (object);
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if (udpsrc->caps)
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gst_caps_unref (udpsrc->caps);
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g_free (udpsrc->multi_group);
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g_free (udpsrc->multi_iface);
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g_free (udpsrc->uri);
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if (udpsrc->sockfd >= 0 && udpsrc->closefd)
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CLOSE_SOCKET (udpsrc->sockfd);
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WSA_CLEANUP (object);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
|
|
|
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static GstCaps *
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gst_udpsrc_getcaps (GstBaseSrc * src)
|
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{
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GstUDPSrc *udpsrc;
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udpsrc = GST_UDPSRC (src);
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|
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if (udpsrc->caps)
|
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return gst_caps_ref (udpsrc->caps);
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else
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return gst_caps_new_any ();
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}
|
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|
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/* read a message from the error queue */
|
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static void
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clear_error (GstUDPSrc * udpsrc)
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{
|
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#if defined (MSG_ERRQUEUE)
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struct msghdr cmsg;
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char cbuf[128];
|
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char msgbuf[CMSG_SPACE (128)];
|
|
struct iovec iov;
|
|
|
|
/* Flush ERRORS from fd so next poll will not return at once */
|
|
/* No need for address : We look for local error */
|
|
cmsg.msg_name = NULL;
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cmsg.msg_namelen = 0;
|
|
|
|
/* IOV */
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memset (&cbuf, 0, sizeof (cbuf));
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iov.iov_base = cbuf;
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iov.iov_len = sizeof (cbuf);
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cmsg.msg_iov = &iov;
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cmsg.msg_iovlen = 1;
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|
|
|
/* msg_control */
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memset (&msgbuf, 0, sizeof (msgbuf));
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cmsg.msg_control = &msgbuf;
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cmsg.msg_controllen = sizeof (msgbuf);
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recvmsg (udpsrc->sock.fd, &cmsg, MSG_ERRQUEUE);
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#endif
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}
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|
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static GstFlowReturn
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gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf)
|
|
{
|
|
GstUDPSrc *udpsrc;
|
|
GstNetBuffer *outbuf;
|
|
union gst_sockaddr
|
|
{
|
|
struct sockaddr sa;
|
|
struct sockaddr_in sa_in;
|
|
struct sockaddr_in6 sa_in6;
|
|
struct sockaddr_storage sa_stor;
|
|
} sa;
|
|
socklen_t slen;
|
|
guint8 *pktdata;
|
|
gint pktsize;
|
|
#ifdef G_OS_UNIX
|
|
gint readsize;
|
|
#elif defined G_OS_WIN32
|
|
gulong readsize;
|
|
#endif
|
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GstClockTime timeout;
|
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gint ret;
|
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gboolean try_again;
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|
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udpsrc = GST_UDPSRC_CAST (psrc);
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|
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retry:
|
|
/* quick check, avoid going in select when we already have data */
|
|
readsize = 0;
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if (G_UNLIKELY ((ret =
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IOCTL_SOCKET (udpsrc->sock.fd, FIONREAD, &readsize)) < 0))
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goto ioctl_failed;
|
|
|
|
if (readsize > 0)
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goto no_select;
|
|
|
|
if (udpsrc->timeout > 0) {
|
|
timeout = udpsrc->timeout * GST_USECOND;
|
|
} else {
|
|
timeout = GST_CLOCK_TIME_NONE;
|
|
}
|
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|
|
do {
|
|
try_again = FALSE;
|
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|
|
GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GUINT64_FORMAT,
|
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udpsrc->timeout);
|
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|
|
ret = gst_poll_wait (udpsrc->fdset, timeout);
|
|
GST_LOG_OBJECT (udpsrc, "select returned %d", ret);
|
|
if (G_UNLIKELY (ret < 0)) {
|
|
if (errno == EBUSY)
|
|
goto stopped;
|
|
#ifdef G_OS_WIN32
|
|
if (WSAGetLastError () != WSAEINTR)
|
|
goto select_error;
|
|
#else
|
|
if (errno != EAGAIN && errno != EINTR)
|
|
goto select_error;
|
|
#endif
|
|
try_again = TRUE;
|
|
} else if (G_UNLIKELY (ret == 0)) {
|
|
/* timeout, post element message */
|
|
gst_element_post_message (GST_ELEMENT_CAST (udpsrc),
|
|
gst_message_new_element (GST_OBJECT_CAST (udpsrc),
|
|
gst_structure_new ("GstUDPSrcTimeout",
|
|
"timeout", G_TYPE_UINT64, udpsrc->timeout, NULL)));
|
|
try_again = TRUE;
|
|
}
|
|
} while (G_UNLIKELY (try_again));
|
|
|
|
/* ask how much is available for reading on the socket, this should be exactly
|
|
* one UDP packet. We will check the return value, though, because in some
|
|
* case it can return 0 and we don't want a 0 sized buffer. */
|
|
readsize = 0;
|
|
if (G_UNLIKELY ((ret =
|
|
IOCTL_SOCKET (udpsrc->sock.fd, FIONREAD, &readsize)) < 0))
|
|
goto ioctl_failed;
|
|
|
|
/* if we get here and there is nothing to read from the socket, the select got
|
|
* woken up by activity on the socket but it was not a read. We know someone
|
|
* will also do something with the socket so that we don't go into an infinite
|
|
* loop in the select(). */
|
|
if (G_UNLIKELY (!readsize)) {
|
|
clear_error (udpsrc);
|
|
goto retry;
|
|
}
|
|
|
|
no_select:
|
|
GST_LOG_OBJECT (udpsrc, "ioctl says %d bytes available", (int) readsize);
|
|
|
|
pktdata = g_malloc (readsize);
|
|
pktsize = readsize;
|
|
|
|
while (TRUE) {
|
|
slen = sizeof (sa);
|
|
#ifdef G_OS_WIN32
|
|
ret = recvfrom (udpsrc->sock.fd, (char *) pktdata, pktsize, 0, &sa.sa,
|
|
&slen);
|
|
#else
|
|
ret = recvfrom (udpsrc->sock.fd, pktdata, pktsize, 0, &sa.sa, &slen);
|
|
#endif
|
|
if (G_UNLIKELY (ret < 0)) {
|
|
#ifdef G_OS_WIN32
|
|
/* WSAECONNRESET for a UDP socket means that a packet sent with udpsink
|
|
* generated a "port unreachable" ICMP response. We ignore that and try
|
|
* again. */
|
|
if (WSAGetLastError () == WSAECONNRESET) {
|
|
g_free (pktdata);
|
|
pktdata = NULL;
|
|
goto retry;
|
|
}
|
|
if (WSAGetLastError () != WSAEINTR)
|
|
goto receive_error;
|
|
#else
|
|
if (errno != EAGAIN && errno != EINTR)
|
|
goto receive_error;
|
|
#endif
|
|
} else
|
|
break;
|
|
}
|
|
|
|
/* special case buffer so receivers can also track the address */
|
|
outbuf = gst_netbuffer_new ();
|
|
GST_BUFFER_MALLOCDATA (outbuf) = pktdata;
|
|
|
|
/* patch pktdata and len when stripping off the headers */
|
|
if (G_UNLIKELY (udpsrc->skip_first_bytes != 0)) {
|
|
if (G_UNLIKELY (readsize <= udpsrc->skip_first_bytes))
|
|
goto skip_error;
|
|
|
|
pktdata += udpsrc->skip_first_bytes;
|
|
ret -= udpsrc->skip_first_bytes;
|
|
}
|
|
GST_BUFFER_DATA (outbuf) = pktdata;
|
|
GST_BUFFER_SIZE (outbuf) = ret;
|
|
|
|
switch (sa.sa.sa_family) {
|
|
case AF_INET:
|
|
{
|
|
gst_netaddress_set_ip4_address (&outbuf->from, sa.sa_in.sin_addr.s_addr,
|
|
sa.sa_in.sin_port);
|
|
}
|
|
break;
|
|
case AF_INET6:
|
|
{
|
|
guint8 ip6[16];
|
|
|
|
memcpy (ip6, &sa.sa_in6.sin6_addr, sizeof (ip6));
|
|
gst_netaddress_set_ip6_address (&outbuf->from, ip6, sa.sa_in6.sin6_port);
|
|
}
|
|
break;
|
|
default:
|
|
#ifdef G_OS_WIN32
|
|
WSASetLastError (WSAEAFNOSUPPORT);
|
|
#else
|
|
errno = EAFNOSUPPORT;
|
|
#endif
|
|
goto receive_error;
|
|
}
|
|
GST_LOG_OBJECT (udpsrc, "read %d bytes", (int) readsize);
|
|
|
|
*buf = GST_BUFFER_CAST (outbuf);
|
|
|
|
return GST_FLOW_OK;
|
|
|
|
/* ERRORS */
|
|
select_error:
|
|
{
|
|
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
|
|
("select error %d: %s (%d)", ret, g_strerror (errno), errno));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
stopped:
|
|
{
|
|
GST_DEBUG ("stop called");
|
|
return GST_FLOW_WRONG_STATE;
|
|
}
|
|
ioctl_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
|
|
("ioctl failed %d: %s (%d)", ret, g_strerror (errno), errno));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
receive_error:
|
|
{
|
|
g_free (pktdata);
|
|
#ifdef G_OS_WIN32
|
|
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
|
|
("receive error %d (WSA error: %d)", ret, WSAGetLastError ()));
|
|
#else
|
|
GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL),
|
|
("receive error %d: %s (%d)", ret, g_strerror (errno), errno));
|
|
#endif
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
skip_error:
|
|
{
|
|
GST_ELEMENT_ERROR (udpsrc, STREAM, DECODE, (NULL),
|
|
("UDP buffer to small to skip header"));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
/* Call this function when multicastgroup and/or port are updated */
|
|
|
|
static void
|
|
gst_udpsrc_update_uri (GstUDPSrc * src)
|
|
{
|
|
g_free (src->uri);
|
|
src->uri = g_strdup_printf ("udp://%s:%d", src->multi_group, src->port);
|
|
|
|
GST_DEBUG_OBJECT (src, "updated uri to %s", src->uri);
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_set_uri (GstUDPSrc * src, const gchar * uri)
|
|
{
|
|
gchar *protocol;
|
|
gchar *location;
|
|
gchar *colptr;
|
|
|
|
protocol = gst_uri_get_protocol (uri);
|
|
if (strcmp (protocol, "udp") != 0)
|
|
goto wrong_protocol;
|
|
g_free (protocol);
|
|
|
|
location = gst_uri_get_location (uri);
|
|
if (!location)
|
|
return FALSE;
|
|
colptr = strrchr (location, ':');
|
|
if (colptr != NULL) {
|
|
g_free (src->multi_group);
|
|
src->multi_group = g_strndup (location, colptr - location);
|
|
src->port = atoi (colptr + 1);
|
|
} else {
|
|
g_free (src->multi_group);
|
|
src->multi_group = g_strdup (location);
|
|
src->port = UDP_DEFAULT_PORT;
|
|
}
|
|
g_free (location);
|
|
|
|
gst_udpsrc_update_uri (src);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
wrong_protocol:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
|
|
("error parsing uri %s: wrong protocol (%s != udp)", uri, protocol));
|
|
g_free (protocol);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_udpsrc_set_property (GObject * object, guint prop_id, const GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstUDPSrc *udpsrc = GST_UDPSRC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_BUFFER_SIZE:
|
|
udpsrc->buffer_size = g_value_get_int (value);
|
|
break;
|
|
case PROP_PORT:
|
|
udpsrc->port = g_value_get_int (value);
|
|
gst_udpsrc_update_uri (udpsrc);
|
|
break;
|
|
case PROP_MULTICAST_GROUP:
|
|
g_free (udpsrc->multi_group);
|
|
|
|
if (g_value_get_string (value) == NULL)
|
|
udpsrc->multi_group = g_strdup (UDP_DEFAULT_MULTICAST_GROUP);
|
|
else
|
|
udpsrc->multi_group = g_value_dup_string (value);
|
|
gst_udpsrc_update_uri (udpsrc);
|
|
break;
|
|
case PROP_MULTICAST_IFACE:
|
|
g_free (udpsrc->multi_iface);
|
|
|
|
if (g_value_get_string (value) == NULL)
|
|
udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE);
|
|
else
|
|
udpsrc->multi_iface = g_value_dup_string (value);
|
|
break;
|
|
case PROP_URI:
|
|
gst_udpsrc_set_uri (udpsrc, g_value_get_string (value));
|
|
break;
|
|
case PROP_CAPS:
|
|
{
|
|
const GstCaps *new_caps_val = gst_value_get_caps (value);
|
|
|
|
GstCaps *new_caps;
|
|
|
|
GstCaps *old_caps;
|
|
|
|
if (new_caps_val == NULL) {
|
|
new_caps = gst_caps_new_any ();
|
|
} else {
|
|
new_caps = gst_caps_copy (new_caps_val);
|
|
}
|
|
|
|
old_caps = udpsrc->caps;
|
|
udpsrc->caps = new_caps;
|
|
if (old_caps)
|
|
gst_caps_unref (old_caps);
|
|
gst_pad_set_caps (GST_BASE_SRC (udpsrc)->srcpad, new_caps);
|
|
break;
|
|
}
|
|
case PROP_SOCKFD:
|
|
if (udpsrc->sockfd >= 0 && udpsrc->sockfd != udpsrc->sock.fd &&
|
|
udpsrc->closefd)
|
|
CLOSE_SOCKET (udpsrc->sockfd);
|
|
udpsrc->sockfd = g_value_get_int (value);
|
|
GST_DEBUG ("setting SOCKFD to %d", udpsrc->sockfd);
|
|
break;
|
|
case PROP_TIMEOUT:
|
|
udpsrc->timeout = g_value_get_uint64 (value);
|
|
break;
|
|
case PROP_SKIP_FIRST_BYTES:
|
|
udpsrc->skip_first_bytes = g_value_get_int (value);
|
|
break;
|
|
case PROP_CLOSEFD:
|
|
udpsrc->closefd = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_AUTO_MULTICAST:
|
|
udpsrc->auto_multicast = g_value_get_boolean (value);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_udpsrc_get_property (GObject * object, guint prop_id, GValue * value,
|
|
GParamSpec * pspec)
|
|
{
|
|
GstUDPSrc *udpsrc = GST_UDPSRC (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_BUFFER_SIZE:
|
|
g_value_set_int (value, udpsrc->buffer_size);
|
|
break;
|
|
case PROP_PORT:
|
|
g_value_set_int (value, udpsrc->port);
|
|
break;
|
|
case PROP_MULTICAST_GROUP:
|
|
g_value_set_string (value, udpsrc->multi_group);
|
|
break;
|
|
case PROP_MULTICAST_IFACE:
|
|
g_value_set_string (value, udpsrc->multi_iface);
|
|
break;
|
|
case PROP_URI:
|
|
g_value_set_string (value, udpsrc->uri);
|
|
break;
|
|
case PROP_CAPS:
|
|
gst_value_set_caps (value, udpsrc->caps);
|
|
break;
|
|
case PROP_SOCKFD:
|
|
g_value_set_int (value, udpsrc->sockfd);
|
|
break;
|
|
case PROP_TIMEOUT:
|
|
g_value_set_uint64 (value, udpsrc->timeout);
|
|
break;
|
|
case PROP_SKIP_FIRST_BYTES:
|
|
g_value_set_int (value, udpsrc->skip_first_bytes);
|
|
break;
|
|
case PROP_CLOSEFD:
|
|
g_value_set_boolean (value, udpsrc->closefd);
|
|
break;
|
|
case PROP_SOCK:
|
|
g_value_set_int (value, udpsrc->sock.fd);
|
|
break;
|
|
case PROP_AUTO_MULTICAST:
|
|
g_value_set_boolean (value, udpsrc->auto_multicast);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* create a socket for sending to remote machine */
|
|
static gboolean
|
|
gst_udpsrc_start (GstBaseSrc * bsrc)
|
|
{
|
|
guint bc_val;
|
|
guint err_val;
|
|
gint reuse;
|
|
int port;
|
|
GstUDPSrc *src;
|
|
gint ret;
|
|
int rcvsize;
|
|
#ifdef G_OS_WIN32
|
|
gint len;
|
|
#else
|
|
guint len;
|
|
#endif
|
|
src = GST_UDPSRC (bsrc);
|
|
|
|
if (src->sockfd == -1) {
|
|
/* need to allocate a socket */
|
|
GST_DEBUG_OBJECT (src, "allocating socket for %s:%d", src->multi_group,
|
|
src->port);
|
|
if ((ret =
|
|
gst_udp_get_addr (src->multi_group, src->port, &src->myaddr)) < 0)
|
|
goto getaddrinfo_error;
|
|
|
|
if ((ret = socket (src->myaddr.ss_family, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
|
goto no_socket;
|
|
|
|
src->sock.fd = ret;
|
|
src->externalfd = FALSE;
|
|
|
|
reuse = 1;
|
|
if ((ret =
|
|
setsockopt (src->sock.fd, SOL_SOCKET, SO_REUSEADDR, &reuse,
|
|
sizeof (reuse))) < 0)
|
|
goto setsockopt_error;
|
|
|
|
GST_DEBUG_OBJECT (src, "binding on port %d", src->port);
|
|
|
|
len = gst_udp_get_sockaddr_length (&src->myaddr);
|
|
if ((ret = bind (src->sock.fd, (struct sockaddr *) &src->myaddr, len)) < 0)
|
|
goto bind_error;
|
|
|
|
len = sizeof (src->myaddr);
|
|
if ((ret = getsockname (src->sock.fd, (struct sockaddr *) &src->myaddr,
|
|
&len)) < 0)
|
|
goto getsockname_error;
|
|
} else {
|
|
GST_DEBUG_OBJECT (src, "using provided socket %d", src->sockfd);
|
|
/* we use the configured socket, try to get some info about it */
|
|
len = sizeof (src->myaddr);
|
|
if ((ret =
|
|
getsockname (src->sockfd, (struct sockaddr *) &src->myaddr,
|
|
&len)) < 0)
|
|
goto getsockname_error;
|
|
|
|
src->sock.fd = src->sockfd;
|
|
src->externalfd = TRUE;
|
|
}
|
|
|
|
len = sizeof (rcvsize);
|
|
if (src->buffer_size != 0) {
|
|
rcvsize = src->buffer_size;
|
|
|
|
GST_DEBUG_OBJECT (src, "setting udp buffer of %d bytes", rcvsize);
|
|
/* set buffer size, Note that on Linux this is typically limited to a
|
|
* maximum of around 100K. Also a minimum of 128 bytes is required on
|
|
* Linux. */
|
|
ret =
|
|
setsockopt (src->sock.fd, SOL_SOCKET, SO_RCVBUF, (void *) &rcvsize,
|
|
len);
|
|
if (ret != 0) {
|
|
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
|
|
("Could not create a buffer of requested %d bytes, %d: %s (%d)",
|
|
rcvsize, ret, g_strerror (errno), errno));
|
|
}
|
|
}
|
|
|
|
/* read the value of the receive buffer. Note that on linux this returns 2x the
|
|
* value we set because the kernel allocates extra memory for metadata.
|
|
* The default on Linux is about 100K (which is about 50K without metadata) */
|
|
ret =
|
|
getsockopt (src->sock.fd, SOL_SOCKET, SO_RCVBUF, (void *) &rcvsize, &len);
|
|
if (ret == 0)
|
|
GST_DEBUG_OBJECT (src, "have udp buffer of %d bytes", rcvsize);
|
|
else
|
|
GST_DEBUG_OBJECT (src, "could not get udp buffer size");
|
|
|
|
bc_val = 1;
|
|
if ((ret = setsockopt (src->sock.fd, SOL_SOCKET, SO_BROADCAST, &bc_val,
|
|
sizeof (bc_val))) < 0) {
|
|
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
|
|
("could not configure socket for broadcast %d: %s (%d)", ret,
|
|
g_strerror (errno), errno));
|
|
}
|
|
|
|
/* Accept ERRQUEUE to get and flush icmp errors */
|
|
err_val = 1;
|
|
#if defined (IP_RECVERR)
|
|
if ((ret = setsockopt (src->sock.fd, IPPROTO_IP, IP_RECVERR, &err_val,
|
|
sizeof (err_val))) < 0) {
|
|
GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL),
|
|
("could not configure socket for IP_RECVERR %d: %s (%d)", ret,
|
|
g_strerror (errno), errno));
|
|
}
|
|
#endif
|
|
|
|
if (src->auto_multicast && gst_udp_is_multicast (&src->myaddr)) {
|
|
GST_DEBUG_OBJECT (src, "joining multicast group %s", src->multi_group);
|
|
ret = gst_udp_join_group (src->sock.fd, &src->myaddr, src->multi_iface);
|
|
if (ret < 0)
|
|
goto membership;
|
|
}
|
|
|
|
/* NOTE: sockaddr_in.sin_port works for ipv4 and ipv6 because sin_port
|
|
* follows ss_family on both */
|
|
port = g_ntohs (((struct sockaddr_in *) &src->myaddr)->sin_port);
|
|
GST_DEBUG_OBJECT (src, "bound, on port %d", port);
|
|
if (port != src->port) {
|
|
src->port = port;
|
|
GST_DEBUG_OBJECT (src, "notifying port %d", port);
|
|
g_object_notify (G_OBJECT (src), "port");
|
|
}
|
|
|
|
if ((src->fdset = gst_poll_new (TRUE)) == NULL)
|
|
goto no_fdset;
|
|
|
|
gst_poll_add_fd (src->fdset, &src->sock);
|
|
gst_poll_fd_ctl_read (src->fdset, &src->sock, TRUE);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
getaddrinfo_error:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
|
|
("getaddrinfo failed: %s (%d)", gai_strerror (ret), ret));
|
|
return FALSE;
|
|
}
|
|
no_socket:
|
|
{
|
|
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
|
|
("no socket error %d: %s (%d)", ret, g_strerror (errno), errno));
|
|
return FALSE;
|
|
}
|
|
setsockopt_error:
|
|
{
|
|
CLOSE_IF_REQUESTED (src);
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
|
|
("setsockopt failed %d: %s (%d)", ret, g_strerror (errno), errno));
|
|
return FALSE;
|
|
}
|
|
bind_error:
|
|
{
|
|
CLOSE_IF_REQUESTED (src);
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
|
|
("bind failed %d: %s (%d)", ret, g_strerror (errno), errno));
|
|
return FALSE;
|
|
}
|
|
membership:
|
|
{
|
|
CLOSE_IF_REQUESTED (src);
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
|
|
("could add membership %d: %s (%d)", ret, g_strerror (errno), errno));
|
|
return FALSE;
|
|
}
|
|
getsockname_error:
|
|
{
|
|
CLOSE_IF_REQUESTED (src);
|
|
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
|
|
("getsockname failed %d: %s (%d)", ret, g_strerror (errno), errno));
|
|
return FALSE;
|
|
}
|
|
no_fdset:
|
|
{
|
|
CLOSE_IF_REQUESTED (src);
|
|
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
|
|
("could not create an fdset %d: %s (%d)", ret, g_strerror (errno),
|
|
errno));
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_unlock (GstBaseSrc * bsrc)
|
|
{
|
|
GstUDPSrc *src;
|
|
|
|
src = GST_UDPSRC (bsrc);
|
|
|
|
GST_LOG_OBJECT (src, "Flushing");
|
|
gst_poll_set_flushing (src->fdset, TRUE);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_unlock_stop (GstBaseSrc * bsrc)
|
|
{
|
|
GstUDPSrc *src;
|
|
|
|
src = GST_UDPSRC (bsrc);
|
|
|
|
GST_LOG_OBJECT (src, "No longer flushing");
|
|
gst_poll_set_flushing (src->fdset, FALSE);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_stop (GstBaseSrc * bsrc)
|
|
{
|
|
GstUDPSrc *src;
|
|
|
|
src = GST_UDPSRC (bsrc);
|
|
|
|
GST_DEBUG ("stopping, closing sockets");
|
|
|
|
if (src->sock.fd >= 0) {
|
|
if (src->auto_multicast && gst_udp_is_multicast (&src->myaddr)) {
|
|
GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->multi_group);
|
|
gst_udp_leave_group (src->sock.fd, &src->myaddr);
|
|
}
|
|
CLOSE_IF_REQUESTED (src);
|
|
}
|
|
|
|
if (src->fdset) {
|
|
gst_poll_free (src->fdset);
|
|
src->fdset = NULL;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*** GSTURIHANDLER INTERFACE *************************************************/
|
|
|
|
static GstURIType
|
|
gst_udpsrc_uri_get_type (void)
|
|
{
|
|
return GST_URI_SRC;
|
|
}
|
|
|
|
static gchar **
|
|
gst_udpsrc_uri_get_protocols (void)
|
|
{
|
|
static gchar *protocols[] = { "udp", NULL };
|
|
|
|
return protocols;
|
|
}
|
|
|
|
static const gchar *
|
|
gst_udpsrc_uri_get_uri (GstURIHandler * handler)
|
|
{
|
|
GstUDPSrc *src = GST_UDPSRC (handler);
|
|
|
|
return src->uri;
|
|
}
|
|
|
|
static gboolean
|
|
gst_udpsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri)
|
|
{
|
|
gboolean ret;
|
|
|
|
GstUDPSrc *src = GST_UDPSRC (handler);
|
|
|
|
ret = gst_udpsrc_set_uri (src, uri);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
|
|
{
|
|
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
|
|
|
|
iface->get_type = gst_udpsrc_uri_get_type;
|
|
iface->get_protocols = gst_udpsrc_uri_get_protocols;
|
|
iface->get_uri = gst_udpsrc_uri_get_uri;
|
|
iface->set_uri = gst_udpsrc_uri_set_uri;
|
|
}
|