/* GStreamer * Copyright (C) <2005> Wim Taymans * Copyright (C) <2005> Nokia Corporation * Copyright (C) <2012> Collabora Ltd. * Author: Sebastian Dröge * Copyright (C) 2014 Tim-Philipp Müller * Copyright (C) 2014 Centricular Ltd * * 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-udpsrc * @title: udpsrc * @see_also: udpsink, multifdsink * * udpsrc is a network source that reads UDP packets from the network. * It can be combined with RTP depayloaders to implement RTP streaming. * * The udpsrc element supports automatic port allocation by setting the * #GstUDPSrc:port property to 0. After setting the udpsrc to PAUSED, the * allocated port can be obtained by reading the port property. * * udpsrc can read from multicast groups by setting the #GstUDPSrc:multicast-group * property to the IP address of the multicast group. * * Alternatively one can provide a custom socket to udpsrc with the #GstUDPSrc:socket * property, udpsrc will then not allocate a socket itself but use the provided * one. * * The #GstUDPSrc:caps property is mainly used to give a type to the UDP packet * so that they can be autoplugged in GStreamer pipelines. This is very useful * for RTP implementations where the contents of the UDP packets is transferred * out-of-bounds using SDP or other means. * * The #GstUDPSrc:buffer-size property is used to change the default kernel * buffersizes used for receiving packets. The buffer size may be increased for * high-volume connections, or may be decreased to limit the possible backlog of * incoming data. The system places an absolute limit on these values, on Linux, * for example, the default buffer size is typically 50K and can be increased to * maximally 100K. * * The #GstUDPSrc:skip-first-bytes property is used to strip off an arbitrary * number of bytes from the start of the raw udp packet and can be used to strip * off proprietary header, for example. * * The udpsrc is always a live source. It does however not provide a #GstClock, * this is left for downstream elements such as an RTP session manager or demuxer * (such as an MPEG demuxer). As with all live sources, the captured buffers * will have their timestamp set to the current running time of the pipeline. * * udpsrc implements a #GstURIHandler interface that handles udp://host:port * type URIs. * * If the #GstUDPSrc:timeout property is set to a value bigger than 0, udpsrc * will generate an element message named `GstUDPSrcTimeout` * if no data was received in the given timeout. * * The message's structure contains one field: * * * #guint64 `timeout`: the timeout in nanoseconds that expired when waiting for data. * * The message is typically used to detect that no UDP arrives in the receiver * because it is blocked by a firewall. * * A custom file descriptor can be configured with the * #GstUDPSrc:socket property. The socket will be closed when setting * the element to READY by default. This behaviour can be overridden * with the #GstUDPSrc:close-socket property, in which case the * application is responsible for closing the file descriptor. * * ## Examples * |[ * gst-launch-1.0 -v udpsrc ! fakesink dump=1 * ]| A pipeline to read from the default port and dump the udp packets. * To actually generate udp packets on the default port one can use the * udpsink element. When running the following pipeline in another terminal, the * above mentioned pipeline should dump data packets to the console. * |[ * gst-launch-1.0 -v audiotestsrc ! udpsink * ]| * |[ * gst-launch-1.0 -v udpsrc port=0 ! fakesink * ]| read udp packets from a free port. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif /* Needed to get struct in6_pktinfo. * Also all these have to be before glib.h is included as * otherwise struct in6_pktinfo is not defined completely * due to broken glibc headers */ #define _GNU_SOURCE /* Needed for OSX/iOS to define the IPv6 variants */ #define __APPLE_USE_RFC_3542 #include #ifdef HAVE_SYS_SOCKET_H #include #endif #include #include "gstudpelements.h" #include "gstudpsrc.h" #include #include /* Required for other parts of in_pktinfo / in6_pktinfo but only * on non-Windows and can be included after glib.h */ #ifndef G_PLATFORM_WIN32 #include #endif /* Control messages for getting the destination address */ #ifdef IP_PKTINFO GType gst_ip_pktinfo_message_get_type (void); #define GST_TYPE_IP_PKTINFO_MESSAGE (gst_ip_pktinfo_message_get_type ()) #define GST_IP_PKTINFO_MESSAGE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GST_TYPE_IP_PKTINFO_MESSAGE, GstIPPktinfoMessage)) #define GST_IP_PKTINFO_MESSAGE_CLASS(c) (G_TYPE_CHECK_CLASS_CAST ((c), GST_TYPE_IP_PKTINFO_MESSAGE, GstIPPktinfoMessageClass)) #define GST_IS_IP_PKTINFO_MESSAGE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GST_TYPE_IP_PKTINFO_MESSAGE)) #define GST_IS_IP_PKTINFO_MESSAGE_CLASS(c) (G_TYPE_CHECK_CLASS_TYPE ((c), GST_TYPE_IP_PKTINFO_MESSAGE)) #define GST_IP_PKTINFO_MESSAGE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GST_TYPE_IP_PKTINFO_MESSAGE, GstIPPktinfoMessageClass)) typedef struct _GstIPPktinfoMessage GstIPPktinfoMessage; typedef struct _GstIPPktinfoMessageClass GstIPPktinfoMessageClass; struct _GstIPPktinfoMessageClass { GSocketControlMessageClass parent_class; }; struct _GstIPPktinfoMessage { GSocketControlMessage parent; guint ifindex; #ifndef G_PLATFORM_WIN32 #ifndef __NetBSD__ struct in_addr spec_dst; #endif #endif struct in_addr addr; }; G_DEFINE_TYPE (GstIPPktinfoMessage, gst_ip_pktinfo_message, G_TYPE_SOCKET_CONTROL_MESSAGE); static gsize gst_ip_pktinfo_message_get_size (GSocketControlMessage * message) { return sizeof (struct in_pktinfo); } static int gst_ip_pktinfo_message_get_level (GSocketControlMessage * message) { return IPPROTO_IP; } static int gst_ip_pktinfo_message_get_msg_type (GSocketControlMessage * message) { return IP_PKTINFO; } static GSocketControlMessage * gst_ip_pktinfo_message_deserialize (gint level, gint type, gsize size, gpointer data) { struct in_pktinfo *pktinfo; GstIPPktinfoMessage *message; if (level != IPPROTO_IP || type != IP_PKTINFO) return NULL; if (size < sizeof (struct in_pktinfo)) return NULL; pktinfo = data; message = g_object_new (GST_TYPE_IP_PKTINFO_MESSAGE, NULL); message->ifindex = pktinfo->ipi_ifindex; #ifndef G_PLATFORM_WIN32 #ifndef __NetBSD__ message->spec_dst = pktinfo->ipi_spec_dst; #endif #endif message->addr = pktinfo->ipi_addr; return G_SOCKET_CONTROL_MESSAGE (message); } static void gst_ip_pktinfo_message_init (GstIPPktinfoMessage * message) { } static void gst_ip_pktinfo_message_class_init (GstIPPktinfoMessageClass * class) { GSocketControlMessageClass *scm_class; scm_class = G_SOCKET_CONTROL_MESSAGE_CLASS (class); scm_class->get_size = gst_ip_pktinfo_message_get_size; scm_class->get_level = gst_ip_pktinfo_message_get_level; scm_class->get_type = gst_ip_pktinfo_message_get_msg_type; scm_class->deserialize = gst_ip_pktinfo_message_deserialize; } #endif #ifdef IPV6_PKTINFO GType gst_ipv6_pktinfo_message_get_type (void); #define GST_TYPE_IPV6_PKTINFO_MESSAGE (gst_ipv6_pktinfo_message_get_type ()) #define GST_IPV6_PKTINFO_MESSAGE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GST_TYPE_IPV6_PKTINFO_MESSAGE, GstIPV6PktinfoMessage)) #define GST_IPV6_PKTINFO_MESSAGE_CLASS(c) (G_TYPE_CHECK_CLASS_CAST ((c), GST_TYPE_IPV6_PKTINFO_MESSAGE, GstIPV6PktinfoMessageClass)) #define GST_IS_IPV6_PKTINFO_MESSAGE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GST_TYPE_IPV6_PKTINFO_MESSAGE)) #define GST_IS_IPV6_PKTINFO_MESSAGE_CLASS(c) (G_TYPE_CHECK_CLASS_TYPE ((c), GST_TYPE_IPV6_PKTINFO_MESSAGE)) #define GST_IPV6_PKTINFO_MESSAGE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GST_TYPE_IPV6_PKTINFO_MESSAGE, GstIPV6PktinfoMessageClass)) typedef struct _GstIPV6PktinfoMessage GstIPV6PktinfoMessage; typedef struct _GstIPV6PktinfoMessageClass GstIPV6PktinfoMessageClass; struct _GstIPV6PktinfoMessageClass { GSocketControlMessageClass parent_class; }; struct _GstIPV6PktinfoMessage { GSocketControlMessage parent; guint ifindex; struct in6_addr addr; }; G_DEFINE_TYPE (GstIPV6PktinfoMessage, gst_ipv6_pktinfo_message, G_TYPE_SOCKET_CONTROL_MESSAGE); static gsize gst_ipv6_pktinfo_message_get_size (GSocketControlMessage * message) { return sizeof (struct in6_pktinfo); } static int gst_ipv6_pktinfo_message_get_level (GSocketControlMessage * message) { return IPPROTO_IPV6; } static int gst_ipv6_pktinfo_message_get_msg_type (GSocketControlMessage * message) { return IPV6_PKTINFO; } static GSocketControlMessage * gst_ipv6_pktinfo_message_deserialize (gint level, gint type, gsize size, gpointer data) { struct in6_pktinfo *pktinfo; GstIPV6PktinfoMessage *message; if (level != IPPROTO_IPV6 || type != IPV6_PKTINFO) return NULL; if (size < sizeof (struct in6_pktinfo)) return NULL; pktinfo = data; message = g_object_new (GST_TYPE_IPV6_PKTINFO_MESSAGE, NULL); message->ifindex = pktinfo->ipi6_ifindex; message->addr = pktinfo->ipi6_addr; return G_SOCKET_CONTROL_MESSAGE (message); } static void gst_ipv6_pktinfo_message_init (GstIPV6PktinfoMessage * message) { } static void gst_ipv6_pktinfo_message_class_init (GstIPV6PktinfoMessageClass * class) { GSocketControlMessageClass *scm_class; scm_class = G_SOCKET_CONTROL_MESSAGE_CLASS (class); scm_class->get_size = gst_ipv6_pktinfo_message_get_size; scm_class->get_level = gst_ipv6_pktinfo_message_get_level; scm_class->get_type = gst_ipv6_pktinfo_message_get_msg_type; scm_class->deserialize = gst_ipv6_pktinfo_message_deserialize; } #endif #ifdef IP_RECVDSTADDR GType gst_ip_recvdstaddr_message_get_type (void); #define GST_TYPE_IP_RECVDSTADDR_MESSAGE (gst_ip_recvdstaddr_message_get_type ()) #define GST_IP_RECVDSTADDR_MESSAGE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GST_TYPE_IP_RECVDSTADDR_MESSAGE, GstIPRecvdstaddrMessage)) #define GST_IP_RECVDSTADDR_MESSAGE_CLASS(c) (G_TYPE_CHECK_CLASS_CAST ((c), GST_TYPE_IP_RECVDSTADDR_MESSAGE, GstIPRecvdstaddrMessageClass)) #define GST_IS_IP_RECVDSTADDR_MESSAGE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GST_TYPE_IP_RECVDSTADDR_MESSAGE)) #define GST_IS_IP_RECVDSTADDR_MESSAGE_CLASS(c) (G_TYPE_CHECK_CLASS_TYPE ((c), GST_TYPE_IP_RECVDSTADDR_MESSAGE)) #define GST_IP_RECVDSTADDR_MESSAGE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GST_TYPE_IP_RECVDSTADDR_MESSAGE, GstIPRecvdstaddrMessageClass)) typedef struct _GstIPRecvdstaddrMessage GstIPRecvdstaddrMessage; typedef struct _GstIPRecvdstaddrMessageClass GstIPRecvdstaddrMessageClass; struct _GstIPRecvdstaddrMessageClass { GSocketControlMessageClass parent_class; }; struct _GstIPRecvdstaddrMessage { GSocketControlMessage parent; guint ifindex; struct in_addr addr; }; G_DEFINE_TYPE (GstIPRecvdstaddrMessage, gst_ip_recvdstaddr_message, G_TYPE_SOCKET_CONTROL_MESSAGE); static gsize gst_ip_recvdstaddr_message_get_size (GSocketControlMessage * message) { return sizeof (struct in_addr); } static int gst_ip_recvdstaddr_message_get_level (GSocketControlMessage * message) { return IPPROTO_IP; } static int gst_ip_recvdstaddr_message_get_msg_type (GSocketControlMessage * message) { return IP_RECVDSTADDR; } static GSocketControlMessage * gst_ip_recvdstaddr_message_deserialize (gint level, gint type, gsize size, gpointer data) { struct in_addr *addr; GstIPRecvdstaddrMessage *message; if (level != IPPROTO_IP || type != IP_RECVDSTADDR) return NULL; if (size < sizeof (struct in_addr)) return NULL; addr = data; message = g_object_new (GST_TYPE_IP_RECVDSTADDR_MESSAGE, NULL); message->addr = *addr; return G_SOCKET_CONTROL_MESSAGE (message); } static void gst_ip_recvdstaddr_message_init (GstIPRecvdstaddrMessage * message) { } static void gst_ip_recvdstaddr_message_class_init (GstIPRecvdstaddrMessageClass * class) { GSocketControlMessageClass *scm_class; scm_class = G_SOCKET_CONTROL_MESSAGE_CLASS (class); scm_class->get_size = gst_ip_recvdstaddr_message_get_size; scm_class->get_level = gst_ip_recvdstaddr_message_get_level; scm_class->get_type = gst_ip_recvdstaddr_message_get_msg_type; scm_class->deserialize = gst_ip_recvdstaddr_message_deserialize; } #endif #define GST_TYPE_SOCKET_TIMESTAMP_MODE gst_socket_timestamp_mode_get_type() #define GST_SOCKET_TIMESTAMP_MODE (gst_socket_timestamp_mode_get_type ()) static GType gst_socket_timestamp_mode_get_type (void) { static GType socket_timestamp_mode_type = 0; static const GEnumValue socket_timestamp_mode_types[] = { {GST_SOCKET_TIMESTAMP_MODE_DISABLED, "Disable additional timestamps", "disabled"}, {GST_SOCKET_TIMESTAMP_MODE_REALTIME, "Timestamp with realtime clock (nsec resolution, may not be monotonic)", "realtime"}, {0, NULL, NULL} }; if (!socket_timestamp_mode_type) socket_timestamp_mode_type = g_enum_register_static ("GstSocketTimestampMode", socket_timestamp_mode_types); return socket_timestamp_mode_type; } #ifdef SO_TIMESTAMPNS GType gst_socket_timestamp_message_get_type (void); #define GST_TYPE_SOCKET_TIMESTAMP_MESSAGE (gst_socket_timestamp_message_get_type ()) #define GST_SOCKET_TIMESTAMP_MESSAGE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GST_TYPE_SOCKET_TIMESTAMP_MESSAGE, GstSocketTimestampMessage)) #define GST_SOCKET_TIMESTAMP_MESSAGE_CLASS(c) (G_TYPE_CHECK_CLASS_CAST ((c), GST_TYPE_SOCKET_TIMESTAMP_MESSAGE, GstSocketTimestampMessageClass)) #define GST_IS_SOCKET_TIMESTAMP_MESSAGE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), GST_TYPE_SOCKET_TIMESTAMP_MESSAGE)) #define GST_IS_SOCKET_TIMESTAMP_MESSAGE_CLASS(c) (G_TYPE_CHECK_CLASS_TYPE ((c), GST_TYPE_SOCKET_TIMESTAMP_MESSAGE)) #define GST_SOCKET_TIMESTAMP_MESSAGE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GST_TYPE_SOCKET_TIMESTAMP_MESSAGE, GstSocketTimestampMessageClass)) typedef struct _GstSocketTimestampMessage GstSocketTimestampMessage; typedef struct _GstSocketTimestampMessageClass GstSocketTimestampMessageClass; struct _GstSocketTimestampMessageClass { GSocketControlMessageClass parent_class; }; struct _GstSocketTimestampMessage { GSocketControlMessage parent; struct timespec socket_ts; }; G_DEFINE_TYPE (GstSocketTimestampMessage, gst_socket_timestamp_message, G_TYPE_SOCKET_CONTROL_MESSAGE); static gsize gst_socket_timestamp_message_get_size (GSocketControlMessage * message) { return sizeof (struct timespec); } static int gst_socket_timestamp_message_get_level (GSocketControlMessage * message) { return SOL_SOCKET; } static int gst_socket_timestamp_message_get_msg_type (GSocketControlMessage * message) { return SCM_TIMESTAMPNS; } static GSocketControlMessage * gst_socket_timestamp_message_deserialize (gint level, gint type, gsize size, gpointer data) { GstSocketTimestampMessage *message; if (level != SOL_SOCKET || type != gst_socket_timestamp_message_get_msg_type (NULL)) return NULL; if (size < sizeof (struct timespec)) return NULL; message = g_object_new (GST_TYPE_SOCKET_TIMESTAMP_MESSAGE, NULL); memcpy (&message->socket_ts, data, sizeof (struct timespec)); return G_SOCKET_CONTROL_MESSAGE (message); } static void gst_socket_timestamp_message_init (GstSocketTimestampMessage * message) { } static void gst_socket_timestamp_message_class_init (GstSocketTimestampMessageClass * class) { GSocketControlMessageClass *scm_class; scm_class = G_SOCKET_CONTROL_MESSAGE_CLASS (class); scm_class->get_size = gst_socket_timestamp_message_get_size; scm_class->get_level = gst_socket_timestamp_message_get_level; scm_class->get_type = gst_socket_timestamp_message_get_msg_type; scm_class->deserialize = gst_socket_timestamp_message_deserialize; } #endif static gboolean gst_udpsrc_decide_allocation (GstBaseSrc * bsrc, GstQuery * query) { GstUDPSrc *udpsrc; GstBufferPool *pool; gboolean update; GstStructure *config; GstCaps *caps = NULL; udpsrc = GST_UDPSRC (bsrc); if (gst_query_get_n_allocation_pools (query) > 0) { update = TRUE; } else { update = FALSE; } pool = gst_buffer_pool_new (); config = gst_buffer_pool_get_config (pool); gst_query_parse_allocation (query, &caps, NULL); gst_buffer_pool_config_set_params (config, caps, udpsrc->mtu, 0, 0); gst_buffer_pool_set_config (pool, config); if (update) gst_query_set_nth_allocation_pool (query, 0, pool, udpsrc->mtu, 0, 0); else gst_query_add_allocation_pool (query, pool, udpsrc->mtu, 0, 0); gst_object_unref (pool); return TRUE; } /* not 100% correct, but a good upper bound for memory allocation purposes */ #define MAX_IPV4_UDP_PACKET_SIZE (65536 - 8) GST_DEBUG_CATEGORY_STATIC (udpsrc_debug); #define GST_CAT_DEFAULT (udpsrc_debug) static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); #define UDP_DEFAULT_PORT 5004 #define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0" #define UDP_DEFAULT_MULTICAST_IFACE NULL #define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT) #define UDP_DEFAULT_CAPS NULL #define UDP_DEFAULT_SOCKET NULL #define UDP_DEFAULT_BUFFER_SIZE 0 #define UDP_DEFAULT_TIMEOUT 0 #define UDP_DEFAULT_SKIP_FIRST_BYTES 0 #define UDP_DEFAULT_CLOSE_SOCKET TRUE #define UDP_DEFAULT_USED_SOCKET NULL #define UDP_DEFAULT_AUTO_MULTICAST TRUE #define UDP_DEFAULT_REUSE TRUE #define UDP_DEFAULT_LOOP TRUE #define UDP_DEFAULT_RETRIEVE_SENDER_ADDRESS TRUE #define UDP_DEFAULT_MTU (1492) #define UDP_DEFAULT_MULTICAST_SOURCE NULL enum { PROP_0, PROP_PORT, PROP_MULTICAST_GROUP, PROP_MULTICAST_IFACE, PROP_URI, PROP_CAPS, PROP_SOCKET, PROP_BUFFER_SIZE, PROP_TIMEOUT, PROP_SKIP_FIRST_BYTES, PROP_CLOSE_SOCKET, PROP_USED_SOCKET, PROP_AUTO_MULTICAST, PROP_REUSE, PROP_ADDRESS, PROP_LOOP, PROP_RETRIEVE_SENDER_ADDRESS, PROP_MTU, PROP_SOCKET_TIMESTAMP, PROP_MULTICAST_SOURCE, }; static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data); static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter); static gboolean gst_udpsrc_close (GstUDPSrc * src); static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc); static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc); static GstFlowReturn gst_udpsrc_fill (GstPushSrc * psrc, GstBuffer * outbuf); static void gst_udpsrc_finalize (GObject * object); static void gst_udpsrc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_udpsrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstStateChangeReturn gst_udpsrc_change_state (GstElement * element, GstStateChange transition); #define gst_udpsrc_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstUDPSrc, gst_udpsrc, GST_TYPE_PUSH_SRC, G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_udpsrc_uri_handler_init)); GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (udpsrc, "udpsrc", GST_RANK_NONE, GST_TYPE_UDPSRC, udp_element_init (plugin)); static void gst_udpsrc_class_init (GstUDPSrcClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseSrcClass *gstbasesrc_class; GstPushSrcClass *gstpushsrc_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstbasesrc_class = (GstBaseSrcClass *) klass; gstpushsrc_class = (GstPushSrcClass *) klass; GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src"); #ifdef IP_PKTINFO GST_TYPE_IP_PKTINFO_MESSAGE; #endif #ifdef IPV6_PKTINFO GST_TYPE_IPV6_PKTINFO_MESSAGE; #endif #ifdef IP_RECVDSTADDR GST_TYPE_IP_RECVDSTADDR_MESSAGE; #endif #ifdef SO_TIMESTAMPNS GST_TYPE_SOCKET_TIMESTAMP_MESSAGE; #endif gobject_class->set_property = gst_udpsrc_set_property; gobject_class->get_property = gst_udpsrc_get_property; gobject_class->finalize = gst_udpsrc_finalize; g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PORT, g_param_spec_int ("port", "Port", "The port to receive the packets from, 0=allocate", 0, G_MAXUINT16, UDP_DEFAULT_PORT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /* FIXME 2.0: Remove multicast-group property */ #ifndef GST_REMOVE_DEPRECATED g_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP, g_param_spec_string ("multicast-group", "Multicast Group", "The Address of multicast group to join. (DEPRECATED: " "Use address property instead)", UDP_DEFAULT_MULTICAST_GROUP, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_DEPRECATED)); #endif g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE, g_param_spec_string ("multicast-iface", "Multicast Interface", "The network interface on which to join the multicast group." "This allows multiple interfaces separated by comma. (\"eth0,eth1\")", UDP_DEFAULT_MULTICAST_IFACE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_URI, g_param_spec_string ("uri", "URI", "URI in the form of udp://multicast_group:port", UDP_DEFAULT_URI, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CAPS, g_param_spec_boxed ("caps", "Caps", "The caps of the source pad", GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_SOCKET, g_param_spec_object ("socket", "Socket", "Socket to use for UDP reception. (NULL == allocate)", G_TYPE_SOCKET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BUFFER_SIZE, g_param_spec_int ("buffer-size", "Buffer Size", "Size of the kernel receive buffer in bytes, 0=default", 0, G_MAXINT, UDP_DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT, g_param_spec_uint64 ("timeout", "Timeout", "Post a message after timeout nanoseconds (0 = disabled)", 0, G_MAXUINT64, UDP_DEFAULT_TIMEOUT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SKIP_FIRST_BYTES, g_param_spec_int ("skip-first-bytes", "Skip first bytes", "number of bytes to skip for each udp packet", 0, G_MAXINT, UDP_DEFAULT_SKIP_FIRST_BYTES, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CLOSE_SOCKET, g_param_spec_boolean ("close-socket", "Close socket", "Close socket if passed as property on state change", UDP_DEFAULT_CLOSE_SOCKET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_USED_SOCKET, g_param_spec_object ("used-socket", "Socket Handle", "Socket currently in use for UDP reception. (NULL = no socket)", G_TYPE_SOCKET, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_AUTO_MULTICAST, g_param_spec_boolean ("auto-multicast", "Auto Multicast", "Automatically join/leave multicast groups", UDP_DEFAULT_AUTO_MULTICAST, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_REUSE, g_param_spec_boolean ("reuse", "Reuse", "Enable reuse of the port", UDP_DEFAULT_REUSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_ADDRESS, g_param_spec_string ("address", "Address", "Address to receive packets for. This is equivalent to the " "multicast-group property for now", UDP_DEFAULT_MULTICAST_GROUP, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstUDPSrc:loop: * * Can be used to disable multicast loopback. * * Since: 1.8 */ g_object_class_install_property (gobject_class, PROP_LOOP, g_param_spec_boolean ("loop", "Multicast Loopback", "Used for setting the multicast loop parameter. TRUE = enable," " FALSE = disable", UDP_DEFAULT_LOOP, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstUDPSrc:retrieve-sender-address: * * Whether to retrieve the sender address and add it to the buffers as * meta. Disabling this might result in minor performance improvements * in certain scenarios. * * Since: 1.10 */ g_object_class_install_property (gobject_class, PROP_RETRIEVE_SENDER_ADDRESS, g_param_spec_boolean ("retrieve-sender-address", "Retrieve Sender Address", "Whether to retrieve the sender address and add it to buffers as " "meta. Disabling this might result in minor performance improvements " "in certain scenarios", UDP_DEFAULT_RETRIEVE_SENDER_ADDRESS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstUDPSrc:mtu: * * Maximum expected packet size. This directly defines the allocation * size of the receive buffer pool. * * In case more data is received, a new #GstMemory is appended to the * output buffer, ensuring no data is lost, this however leads to that * buffer being freed and reallocated. * * Since: 1.14 */ g_object_class_install_property (gobject_class, PROP_MTU, g_param_spec_uint ("mtu", "Expected Maximum Transmission Unit", "Maximum expected packet size. This directly defines the allocation" "size of the receive buffer pool.", 0, G_MAXINT, UDP_DEFAULT_MTU, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstUDPSrc:socket-timestamp: * * Can be used to read the timestamp on incoming buffers using socket * control messages and set as the DTS. * * Since: 1.20 */ g_object_class_install_property (gobject_class, PROP_SOCKET_TIMESTAMP, g_param_spec_enum ("socket-timestamp", "Use Socket Control Message Timestamp for DTS", "Used for adding alternative timestamp using SO_TIMESTAMP.", GST_SOCKET_TIMESTAMP_MODE, GST_SOCKET_TIMESTAMP_MODE_REALTIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstUDPSrc:multicast-source: * * List of source to receive the stream from. (IGMPv3 SSM RFC 4604) * * Since: 1.24 */ g_object_class_install_property (gobject_class, PROP_MULTICAST_SOURCE, g_param_spec_string ("multicast-source", "Multicast source", "List of source to receive the stream with \'+\' (positive filter) or" " \'-\' (negative filter, ignored for now) prefix " "(e.g., \"+SOURCE0+SOURCE1+SOURCE2\"). Alternatively, user can use " "URI query with the key value \"multicast-source\"", UDP_DEFAULT_MULTICAST_SOURCE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_add_static_pad_template (gstelement_class, &src_template); gst_element_class_set_static_metadata (gstelement_class, "UDP packet receiver", "Source/Network", "Receive data over the network via UDP", "Wim Taymans , " "Thijs Vermeir "); gstelement_class->change_state = gst_udpsrc_change_state; gstbasesrc_class->unlock = gst_udpsrc_unlock; gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop; gstbasesrc_class->get_caps = gst_udpsrc_getcaps; gstbasesrc_class->decide_allocation = gst_udpsrc_decide_allocation; gstpushsrc_class->fill = gst_udpsrc_fill; gst_type_mark_as_plugin_api (GST_TYPE_SOCKET_TIMESTAMP_MODE, 0); } static void gst_udpsrc_init (GstUDPSrc * udpsrc) { udpsrc->uri = g_strdup_printf ("udp://%s:%u", UDP_DEFAULT_MULTICAST_GROUP, UDP_DEFAULT_PORT); udpsrc->address = g_strdup (UDP_DEFAULT_MULTICAST_GROUP); udpsrc->port = UDP_DEFAULT_PORT; udpsrc->socket = UDP_DEFAULT_SOCKET; udpsrc->multi_iface = g_strdup (UDP_DEFAULT_MULTICAST_IFACE); udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE; udpsrc->timeout = UDP_DEFAULT_TIMEOUT; udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES; udpsrc->close_socket = UDP_DEFAULT_CLOSE_SOCKET; udpsrc->external_socket = (udpsrc->socket != NULL); udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST; udpsrc->used_socket = UDP_DEFAULT_USED_SOCKET; udpsrc->reuse = UDP_DEFAULT_REUSE; udpsrc->loop = UDP_DEFAULT_LOOP; udpsrc->retrieve_sender_address = UDP_DEFAULT_RETRIEVE_SENDER_ADDRESS; udpsrc->mtu = UDP_DEFAULT_MTU; udpsrc->source_list = g_ptr_array_new_with_free_func ((GDestroyNotify) g_free); /* configure basesrc to be a live source */ gst_base_src_set_live (GST_BASE_SRC (udpsrc), TRUE); /* make basesrc output a segment in time */ gst_base_src_set_format (GST_BASE_SRC (udpsrc), GST_FORMAT_TIME); /* make basesrc set timestamps on outgoing buffers based on the running_time * when they were captured */ gst_base_src_set_do_timestamp (GST_BASE_SRC (udpsrc), TRUE); } static void gst_udpsrc_finalize (GObject * object) { GstUDPSrc *udpsrc; udpsrc = GST_UDPSRC (object); if (udpsrc->caps) gst_caps_unref (udpsrc->caps); udpsrc->caps = NULL; g_free (udpsrc->multi_iface); udpsrc->multi_iface = NULL; g_free (udpsrc->uri); udpsrc->uri = NULL; g_free (udpsrc->address); udpsrc->address = NULL; if (udpsrc->socket) g_object_unref (udpsrc->socket); udpsrc->socket = NULL; if (udpsrc->used_socket) g_object_unref (udpsrc->used_socket); udpsrc->used_socket = NULL; if (udpsrc->extra_mem) gst_memory_unref (udpsrc->extra_mem); udpsrc->extra_mem = NULL; g_ptr_array_unref (udpsrc->source_list); g_free (udpsrc->multicast_source); G_OBJECT_CLASS (parent_class)->finalize (object); } static GstCaps * gst_udpsrc_getcaps (GstBaseSrc * src, GstCaps * filter) { GstUDPSrc *udpsrc; GstCaps *caps, *result; udpsrc = GST_UDPSRC (src); GST_OBJECT_LOCK (src); if ((caps = udpsrc->caps)) gst_caps_ref (caps); GST_OBJECT_UNLOCK (src); if (caps) { if (filter) { result = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST); gst_caps_unref (caps); } else { result = caps; } } else { result = (filter) ? gst_caps_ref (filter) : gst_caps_new_any (); } return result; } static void gst_udpsrc_create_cancellable (GstUDPSrc * src) { GPollFD pollfd; src->cancellable = g_cancellable_new (); src->made_cancel_fd = g_cancellable_make_pollfd (src->cancellable, &pollfd); } static void gst_udpsrc_free_cancellable (GstUDPSrc * src) { if (src->made_cancel_fd) { g_cancellable_release_fd (src->cancellable); src->made_cancel_fd = FALSE; } g_clear_object (&src->cancellable); } static GstFlowReturn gst_udpsrc_fill (GstPushSrc * psrc, GstBuffer * outbuf) { GstUDPSrc *udpsrc; GSocketAddress *saddr = NULL; GSocketAddress **p_saddr; gint flags = G_SOCKET_MSG_NONE; gboolean try_again; GError *err = NULL; gssize res; gsize offset; GSocketControlMessage **msgs = NULL; GSocketControlMessage ***p_msgs; gint n_msgs = 0, i; GstMapInfo info; GstMapInfo extra_info; GInputVector ivec[2]; udpsrc = GST_UDPSRC_CAST (psrc); /* optimization: use messages only in multicast mode and * if we can't let the kernel do the filtering for us */ p_msgs = (g_inet_address_get_is_multicast (g_inet_socket_address_get_address (udpsrc->addr))) ? &msgs : NULL; #ifdef IP_MULTICAST_ALL if (g_inet_address_get_family (g_inet_socket_address_get_address (udpsrc->addr)) == G_SOCKET_FAMILY_IPV4) p_msgs = NULL; #endif #ifdef SO_TIMESTAMPNS if (udpsrc->socket_timestamp_mode == GST_SOCKET_TIMESTAMP_MODE_REALTIME) p_msgs = &msgs; #endif /* Retrieve sender address unless we've been configured not to do so */ p_saddr = (udpsrc->retrieve_sender_address) ? &saddr : NULL; if (!gst_buffer_map (outbuf, &info, GST_MAP_READWRITE)) goto buffer_map_error; ivec[0].buffer = info.data; ivec[0].size = info.size; /* Prepare memory in case the data size exceeds mtu */ if (udpsrc->extra_mem == NULL) { GstBufferPool *pool; GstStructure *config; GstAllocator *allocator = NULL; GstAllocationParams params; pool = gst_base_src_get_buffer_pool (GST_BASE_SRC_CAST (psrc)); config = gst_buffer_pool_get_config (pool); gst_buffer_pool_config_get_allocator (config, &allocator, ¶ms); udpsrc->extra_mem = gst_allocator_alloc (allocator, MAX_IPV4_UDP_PACKET_SIZE, ¶ms); gst_object_unref (pool); gst_structure_free (config); if (allocator) gst_object_unref (allocator); } if (!gst_memory_map (udpsrc->extra_mem, &extra_info, GST_MAP_READWRITE)) goto memory_map_error; ivec[1].buffer = extra_info.data; ivec[1].size = extra_info.size; retry: if (saddr != NULL) { g_object_unref (saddr); saddr = NULL; } do { gint64 timeout; try_again = FALSE; if (udpsrc->timeout) timeout = udpsrc->timeout / 1000; else timeout = -1; GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GINT64_FORMAT, timeout); if (!g_socket_condition_timed_wait (udpsrc->used_socket, G_IO_IN | G_IO_PRI, timeout, udpsrc->cancellable, &err)) { if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY) || g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) { goto stopped; } else if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_TIMED_OUT)) { g_clear_error (&err); /* 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))); } else { goto select_error; } try_again = TRUE; } } while (G_UNLIKELY (try_again)); res = g_socket_receive_message (udpsrc->used_socket, p_saddr, ivec, 2, p_msgs, &n_msgs, &flags, udpsrc->cancellable, &err); if (G_UNLIKELY (res < 0)) { /* G_IO_ERROR_HOST_UNREACHABLE for a UDP socket means that a packet sent * with udpsink generated a "port unreachable" ICMP response. We ignore * that and try again. * On Windows we get G_IO_ERROR_CONNECTION_CLOSED instead */ if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE) || g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CONNECTION_CLOSED)) { g_clear_error (&err); goto retry; } goto receive_error; } /* Retry if multicast and the destination address is not ours. We don't want * to receive arbitrary packets */ if (p_msgs) { GInetAddress *iaddr = g_inet_socket_address_get_address (udpsrc->addr); gboolean skip_packet = FALSE; gsize iaddr_size = g_inet_address_get_native_size (iaddr); const guint8 *iaddr_bytes = g_inet_address_to_bytes (iaddr); for (i = 0; i < n_msgs && !skip_packet; i++) { #ifdef IP_PKTINFO if (GST_IS_IP_PKTINFO_MESSAGE (msgs[i])) { GstIPPktinfoMessage *msg = GST_IP_PKTINFO_MESSAGE (msgs[i]); if (sizeof (msg->addr) == iaddr_size && memcmp (iaddr_bytes, &msg->addr, sizeof (msg->addr))) skip_packet = TRUE; } #endif #ifdef IPV6_PKTINFO if (GST_IS_IPV6_PKTINFO_MESSAGE (msgs[i])) { GstIPV6PktinfoMessage *msg = GST_IPV6_PKTINFO_MESSAGE (msgs[i]); if (sizeof (msg->addr) == iaddr_size && memcmp (iaddr_bytes, &msg->addr, sizeof (msg->addr))) skip_packet = TRUE; } #endif #ifdef IP_RECVDSTADDR if (GST_IS_IP_RECVDSTADDR_MESSAGE (msgs[i])) { GstIPRecvdstaddrMessage *msg = GST_IP_RECVDSTADDR_MESSAGE (msgs[i]); if (sizeof (msg->addr) == iaddr_size && memcmp (iaddr_bytes, &msg->addr, sizeof (msg->addr))) skip_packet = TRUE; } #endif #ifdef SO_TIMESTAMPNS if (GST_IS_SOCKET_TIMESTAMP_MESSAGE (msgs[i])) { GstSocketTimestampMessage *msg = GST_SOCKET_TIMESTAMP_MESSAGE (msgs[i]); GstClock *clock; GstClockTime socket_ts; socket_ts = GST_TIMESPEC_TO_TIME (msg->socket_ts); GST_TRACE_OBJECT (udpsrc, "Got SCM_TIMESTAMPNS %" GST_TIME_FORMAT " in msg", GST_TIME_ARGS (socket_ts)); clock = gst_element_get_clock (GST_ELEMENT_CAST (udpsrc)); if (clock != NULL) { gint64 adjust_dts, cur_sys_time, delta; GstClockTime base_time, cur_gst_clk_time, running_time; /* * We use g_get_real_time as the time reference for SCM timestamps * is always CLOCK_REALTIME. */ cur_sys_time = g_get_real_time () * GST_USECOND; cur_gst_clk_time = gst_clock_get_time (clock); delta = (gint64) cur_sys_time - (gint64) socket_ts; if (delta < 0) { /* * The current system time will always be greater than the SCM * timestamp as the packet would have been timestamped at least * some clock cycles before. If it is not, then the system time * was adjusted. Since we cannot rely on the delta calculation in * such a case, set the DTS to current pipeline clock when this * happens. */ GST_LOG_OBJECT (udpsrc, "Current system time is behind SCM timestamp, setting DTS to pipeline clock"); GST_BUFFER_DTS (outbuf) = cur_gst_clk_time; } else { base_time = gst_element_get_base_time (GST_ELEMENT_CAST (udpsrc)); running_time = cur_gst_clk_time - base_time; adjust_dts = (gint64) running_time - delta; /* * If the system time was adjusted much further ahead, we might * end up with delta > cur_gst_clk_time. Set the DTS to current * pipeline clock for this scenario as well. */ if (adjust_dts < 0) { GST_LOG_OBJECT (udpsrc, "Current system time much ahead in time, setting DTS to pipeline clock"); GST_BUFFER_DTS (outbuf) = cur_gst_clk_time; } else { GST_BUFFER_DTS (outbuf) = adjust_dts; GST_LOG_OBJECT (udpsrc, "Setting DTS to %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_DTS (outbuf))); } } g_object_unref (clock); } else { GST_ERROR_OBJECT (udpsrc, "Failed to get element clock, not setting DTS"); } } #endif } for (i = 0; i < n_msgs; i++) { g_object_unref (msgs[i]); } g_free (msgs); if (skip_packet) { GST_DEBUG_OBJECT (udpsrc, "Dropping packet for a different multicast address"); goto retry; } } gst_buffer_unmap (outbuf, &info); gst_memory_unmap (udpsrc->extra_mem, &extra_info); /* If this is the case, the buffer will be freed once unreffed, * and the buffer pool will have to reallocate a new one. */ if (res > udpsrc->mtu) { gst_buffer_append_memory (outbuf, udpsrc->extra_mem); udpsrc->extra_mem = NULL; } offset = udpsrc->skip_first_bytes; if (G_UNLIKELY (offset > 0 && res < offset)) goto skip_error; gst_buffer_resize (outbuf, offset, res - offset); /* use buffer metadata so receivers can also track the address */ if (saddr) { gst_buffer_add_net_address_meta (outbuf, saddr); g_object_unref (saddr); saddr = NULL; } GST_LOG_OBJECT (udpsrc, "read packet of %d bytes", (int) res); return GST_FLOW_OK; /* ERRORS */ buffer_map_error: { GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL), ("Failed to map memory")); return GST_FLOW_ERROR; } memory_map_error: { gst_buffer_unmap (outbuf, &info); GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL), ("Failed to map memory")); return GST_FLOW_ERROR; } select_error: { gst_buffer_unmap (outbuf, &info); gst_memory_unmap (udpsrc->extra_mem, &extra_info); GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL), ("select error: %s", err->message)); g_clear_error (&err); return GST_FLOW_ERROR; } stopped: { gst_buffer_unmap (outbuf, &info); gst_memory_unmap (udpsrc->extra_mem, &extra_info); GST_DEBUG ("stop called"); g_clear_error (&err); return GST_FLOW_FLUSHING; } receive_error: { gst_buffer_unmap (outbuf, &info); gst_memory_unmap (udpsrc->extra_mem, &extra_info); g_clear_object (&saddr); if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_BUSY) || g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED)) { g_clear_error (&err); return GST_FLOW_FLUSHING; } else { GST_ELEMENT_ERROR (udpsrc, RESOURCE, READ, (NULL), ("receive error %" G_GSSIZE_FORMAT ": %s", res, err->message)); g_clear_error (&err); return GST_FLOW_ERROR; } } skip_error: { g_clear_object (&saddr); GST_ELEMENT_ERROR (udpsrc, STREAM, DECODE, (NULL), ("UDP buffer to small to skip header")); return GST_FLOW_ERROR; } } static gboolean gst_udpsrc_set_uri (GstUDPSrc * src, const gchar * uri, GError ** error) { gchar *address; guint16 port; gboolean source_updated = FALSE; gchar *new_source = NULL; GST_OBJECT_LOCK (src); g_ptr_array_set_size (src->source_list, 0); if (!gst_udp_parse_uri (uri, &address, &port, src->source_list)) { GST_OBJECT_UNLOCK (src); goto wrong_uri; } if (port == (guint16) - 1) port = UDP_DEFAULT_PORT; g_free (src->address); src->address = address; src->port = port; if (src->source_list->len > 0) { GString *str = g_string_new (NULL); guint i; /* FIXME: gst_udp_parse_uri() will handle only positive filters for now */ for (i = 0; i < src->source_list->len; i++) { gchar *s = g_ptr_array_index (src->source_list, i); g_string_append_c (str, '+'); g_string_append (str, s); } new_source = g_string_free (str, FALSE); } if (g_strcmp0 (src->multicast_source, new_source) != 0) source_updated = TRUE; g_free (src->multicast_source); src->multicast_source = new_source; g_free (src->uri); src->uri = g_strdup (uri); GST_OBJECT_UNLOCK (src); if (source_updated) g_object_notify (G_OBJECT (src), "multicast-source"); return TRUE; /* ERRORS */ wrong_uri: { GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("error parsing uri %s", uri)); g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI, "Could not parse UDP URI"); 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); g_free (udpsrc->uri); udpsrc->uri = g_strdup_printf ("udp://%s:%u", udpsrc->address, udpsrc->port); break; case PROP_MULTICAST_GROUP: case PROP_ADDRESS: { const gchar *group; g_free (udpsrc->address); if ((group = g_value_get_string (value))) udpsrc->address = g_strdup (group); else udpsrc->address = g_strdup (UDP_DEFAULT_MULTICAST_GROUP); g_free (udpsrc->uri); udpsrc->uri = g_strdup_printf ("udp://%s:%u", udpsrc->address, udpsrc->port); 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), NULL); 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); } GST_OBJECT_LOCK (udpsrc); old_caps = udpsrc->caps; udpsrc->caps = new_caps; GST_OBJECT_UNLOCK (udpsrc); if (old_caps) gst_caps_unref (old_caps); gst_pad_mark_reconfigure (GST_BASE_SRC_PAD (udpsrc)); break; } case PROP_SOCKET: if (udpsrc->socket != NULL && udpsrc->socket != udpsrc->used_socket && udpsrc->close_socket) { GError *err = NULL; if (!g_socket_close (udpsrc->socket, &err)) { GST_ERROR ("failed to close socket %p: %s", udpsrc->socket, err->message); g_clear_error (&err); } } if (udpsrc->socket) g_object_unref (udpsrc->socket); udpsrc->socket = g_value_dup_object (value); GST_DEBUG ("setting socket to %p", udpsrc->socket); 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_CLOSE_SOCKET: udpsrc->close_socket = g_value_get_boolean (value); break; case PROP_AUTO_MULTICAST: udpsrc->auto_multicast = g_value_get_boolean (value); break; case PROP_REUSE: udpsrc->reuse = g_value_get_boolean (value); break; case PROP_LOOP: udpsrc->loop = g_value_get_boolean (value); break; case PROP_RETRIEVE_SENDER_ADDRESS: udpsrc->retrieve_sender_address = g_value_get_boolean (value); break; case PROP_MTU: udpsrc->mtu = g_value_get_uint (value); break; case PROP_SOCKET_TIMESTAMP: udpsrc->socket_timestamp_mode = g_value_get_enum (value); break; case PROP_MULTICAST_SOURCE: GST_OBJECT_LOCK (udpsrc); g_free (udpsrc->multicast_source); udpsrc->multicast_source = g_value_dup_string (value); g_ptr_array_set_size (udpsrc->source_list, 0); if (udpsrc->multicast_source) { gst_udp_parse_multicast_source (udpsrc->multicast_source, udpsrc->source_list); } GST_OBJECT_UNLOCK (udpsrc); 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: case PROP_ADDRESS: g_value_set_string (value, udpsrc->address); 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_OBJECT_LOCK (udpsrc); gst_value_set_caps (value, udpsrc->caps); GST_OBJECT_UNLOCK (udpsrc); break; case PROP_SOCKET: g_value_set_object (value, udpsrc->socket); 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_CLOSE_SOCKET: g_value_set_boolean (value, udpsrc->close_socket); break; case PROP_USED_SOCKET: g_value_set_object (value, udpsrc->used_socket); break; case PROP_AUTO_MULTICAST: g_value_set_boolean (value, udpsrc->auto_multicast); break; case PROP_REUSE: g_value_set_boolean (value, udpsrc->reuse); break; case PROP_LOOP: g_value_set_boolean (value, udpsrc->loop); break; case PROP_RETRIEVE_SENDER_ADDRESS: g_value_set_boolean (value, udpsrc->retrieve_sender_address); break; case PROP_MTU: g_value_set_uint (value, udpsrc->mtu); break; case PROP_SOCKET_TIMESTAMP: g_value_set_enum (value, udpsrc->socket_timestamp_mode); break; case PROP_MULTICAST_SOURCE: GST_OBJECT_LOCK (udpsrc); g_value_set_string (value, udpsrc->multicast_source); GST_OBJECT_UNLOCK (udpsrc); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GInetAddress * gst_udpsrc_resolve (GstUDPSrc * src, const gchar * address) { GInetAddress *addr; GError *err = NULL; GResolver *resolver; addr = g_inet_address_new_from_string (address); if (!addr) { GList *results; GST_DEBUG_OBJECT (src, "resolving IP address for host %s", address); resolver = g_resolver_get_default (); results = g_resolver_lookup_by_name (resolver, address, src->cancellable, &err); if (!results) goto name_resolve; addr = G_INET_ADDRESS (g_object_ref (results->data)); g_resolver_free_addresses (results); g_object_unref (resolver); } #ifndef GST_DISABLE_GST_DEBUG { gchar *ip = g_inet_address_to_string (addr); GST_DEBUG_OBJECT (src, "IP address for host %s is %s", address, ip); g_free (ip); } #endif return addr; name_resolve: { GST_WARNING_OBJECT (src, "Failed to resolve %s: %s", address, err->message); g_clear_error (&err); g_object_unref (resolver); return NULL; } } static gint gst_udpsrc_get_rcvbuf (GstUDPSrc * src) { gint val = 0; /* 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) */ if (!g_socket_get_option (src->used_socket, SOL_SOCKET, SO_RCVBUF, &val, NULL)) { GST_DEBUG_OBJECT (src, "could not get udp buffer size"); return 0; } #ifdef __linux__ /* Devise by 2 so that the numbers matches when we do get/set */ val /= 2; #endif return val; } /* create a socket for sending to remote machine */ static gboolean gst_udpsrc_open (GstUDPSrc * src) { GInetAddress *addr, *bind_addr; GSocketAddress *bind_saddr; GError *err = NULL; gboolean allow_port_reuse = src->reuse; if (src->source_addrs) { g_list_free_full (src->source_addrs, (GDestroyNotify) g_object_unref); src->source_addrs = NULL; } gst_udpsrc_create_cancellable (src); if (src->socket == NULL) { /* need to allocate a socket */ GST_DEBUG_OBJECT (src, "allocating socket for %s:%d", src->address, src->port); addr = gst_udpsrc_resolve (src, src->address); if (!addr) goto name_resolve; if ((src->used_socket = g_socket_new (g_inet_address_get_family (addr), G_SOCKET_TYPE_DATAGRAM, G_SOCKET_PROTOCOL_UDP, &err)) == NULL) goto no_socket; src->external_socket = FALSE; GST_DEBUG_OBJECT (src, "got socket %p", src->used_socket); if (src->addr) g_object_unref (src->addr); src->addr = G_INET_SOCKET_ADDRESS (g_inet_socket_address_new (addr, src->port)); GST_DEBUG_OBJECT (src, "binding on port %d", src->port); /* For multicast, bind to ANY and join the multicast group later */ if (g_inet_address_get_is_multicast (addr)) bind_addr = g_inet_address_new_any (g_inet_address_get_family (addr)); else bind_addr = G_INET_ADDRESS (g_object_ref (addr)); g_object_unref (addr); bind_saddr = g_inet_socket_address_new (bind_addr, src->port); g_object_unref (bind_addr); if (allow_port_reuse && src->port == 0 && !g_inet_address_get_is_multicast (addr)) { GST_WARNING_OBJECT (src, "Disabling port reuse for dynamically allocated port to avoid potential conflicts"); allow_port_reuse = FALSE; } if (!g_socket_bind (src->used_socket, bind_saddr, allow_port_reuse, &err)) { GST_ERROR_OBJECT (src, "%s: error binding to %s:%d", err->message, src->address, src->port); goto bind_error; } g_object_unref (bind_saddr); g_socket_set_multicast_loopback (src->used_socket, src->loop); } else { GInetSocketAddress *local_addr; GST_DEBUG_OBJECT (src, "using provided socket %p", src->socket); /* we use the configured socket, try to get some info about it */ src->used_socket = G_SOCKET (g_object_ref (src->socket)); src->external_socket = TRUE; local_addr = G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket, &err)); if (!local_addr) goto getsockname_error; addr = gst_udpsrc_resolve (src, src->address); if (!addr) goto name_resolve; /* If bound to ANY and address points to a multicast address, make * sure that address is not overridden with ANY but we have the * opportunity later to join the multicast address. This ensures that we * have the same behaviour as for sockets created by udpsrc */ if (!src->auto_multicast || !g_inet_address_get_is_any (g_inet_socket_address_get_address (local_addr)) || !g_inet_address_get_is_multicast (addr)) { g_object_unref (addr); if (src->addr) g_object_unref (src->addr); src->addr = local_addr; } else { g_object_unref (local_addr); if (src->addr) g_object_unref (src->addr); src->addr = G_INET_SOCKET_ADDRESS (g_inet_socket_address_new (addr, src->port)); g_object_unref (addr); } } { gint val; GError *opt_err = NULL; gboolean force_rcvbuf G_GNUC_UNUSED = FALSE; if (src->buffer_size != 0) { GST_INFO_OBJECT (src, "setting udp buffer of %d bytes", src->buffer_size); /* 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. */ if (!g_socket_set_option (src->used_socket, SOL_SOCKET, SO_RCVBUF, src->buffer_size, &opt_err)) { GST_INFO_OBJECT (src, "Could not create a buffer of requested %d bytes (%s) try forcing", src->buffer_size, opt_err->message); g_clear_error (&opt_err); force_rcvbuf = TRUE; } } #if defined(SO_RCVBUFFORCE) val = gst_udpsrc_get_rcvbuf (src); if (val < src->buffer_size) force_rcvbuf = TRUE; if (force_rcvbuf) { GST_INFO_OBJECT (src, "forcibly setting udp buffer of %d bytes", src->buffer_size); /* Will only work with CAP_NET_ADMIN privilege */ if (!g_socket_set_option (src->used_socket, SOL_SOCKET, SO_RCVBUFFORCE, src->buffer_size, &opt_err)) { GST_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL), ("Could not create a buffer of requested %d bytes (%s). Need net.admin privilege?", src->buffer_size, opt_err->message)); g_clear_error (&opt_err); } } #endif val = gst_udpsrc_get_rcvbuf (src); if (val < src->buffer_size) GST_WARNING_OBJECT (src, "have udp buffer of %d bytes while %d were requested", val, src->buffer_size); else GST_INFO_OBJECT (src, "have udp buffer of %d bytes", val); } g_socket_set_broadcast (src->used_socket, TRUE); if (src->auto_multicast && g_inet_address_get_is_multicast (g_inet_socket_address_get_address (src->addr))) { guint i; GList *iter; for (i = 0; i < src->source_list->len; i++) { gchar *source_addr_str = g_ptr_array_index (src->source_list, i); GInetAddress *source_addr = gst_udpsrc_resolve (src, source_addr_str); if (!source_addr) { GST_WARNING_OBJECT (src, "Couldn't resolve address %s", source_addr_str); } else { GST_DEBUG_OBJECT (src, "Adding multicast-source %s", source_addr_str); src->source_addrs = g_list_append (src->source_addrs, source_addr); } } if (src->multi_iface) { GStrv multi_ifaces = g_strsplit (src->multi_iface, ",", -1); gchar **ifaces = multi_ifaces; while (*ifaces) { g_strstrip (*ifaces); GST_DEBUG_OBJECT (src, "joining multicast group %s interface %s", src->address, *ifaces); if (!src->source_addrs) { if (!g_socket_join_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, *ifaces, &err)) { g_strfreev (multi_ifaces); goto membership; } } else { for (iter = src->source_addrs; iter; iter = g_list_next (iter)) { GInetAddress *source_addr = (GInetAddress *) iter->data; if (!g_socket_join_multicast_group_ssm (src->used_socket, g_inet_socket_address_get_address (src->addr), source_addr, *ifaces, &err)) { g_strfreev (multi_ifaces); goto membership; } } } ifaces++; } g_strfreev (multi_ifaces); } else { GST_DEBUG_OBJECT (src, "joining multicast group %s", src->address); if (!src->source_addrs) { if (!g_socket_join_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, NULL, &err)) { goto membership; } } else { for (iter = src->source_addrs; iter; iter = g_list_next (iter)) { GInetAddress *source_addr = (GInetAddress *) iter->data; if (!g_socket_join_multicast_group_ssm (src->used_socket, g_inet_socket_address_get_address (src->addr), source_addr, NULL, &err)) { goto membership; } } } } if (g_inet_address_get_family (g_inet_socket_address_get_address (src->addr)) == G_SOCKET_FAMILY_IPV4) { #if defined(IP_MULTICAST_ALL) if (!g_socket_set_option (src->used_socket, IPPROTO_IP, IP_MULTICAST_ALL, 0, &err)) { GST_WARNING_OBJECT (src, "Failed to disable IP_MULTICAST_ALL: %s", err->message); g_clear_error (&err); } #elif defined(IP_PKTINFO) if (!g_socket_set_option (src->used_socket, IPPROTO_IP, IP_PKTINFO, TRUE, &err)) { GST_WARNING_OBJECT (src, "Failed to enable IP_PKTINFO: %s", err->message); g_clear_error (&err); } #elif defined(IP_RECVDSTADDR) if (!g_socket_set_option (src->used_socket, IPPROTO_IP, IP_RECVDSTADDR, TRUE, &err)) { GST_WARNING_OBJECT (src, "Failed to enable IP_RECVDSTADDR: %s", err->message); g_clear_error (&err); } #else #pragma message("No API available for getting IPv4 destination address") GST_WARNING_OBJECT (src, "No API available for getting IPv4 destination " "address, will receive packets for every destination to our port"); #endif } else if (g_inet_address_get_family (g_inet_socket_address_get_address (src->addr)) == G_SOCKET_FAMILY_IPV6) { #ifdef IPV6_PKTINFO #ifdef IPV6_RECVPKTINFO if (!g_socket_set_option (src->used_socket, IPPROTO_IPV6, IPV6_RECVPKTINFO, TRUE, &err)) { #else if (!g_socket_set_option (src->used_socket, IPPROTO_IPV6, IPV6_PKTINFO, TRUE, &err)) { #endif GST_WARNING_OBJECT (src, "Failed to enable IPV6_PKTINFO: %s", err->message); g_clear_error (&err); } #else #pragma message("No API available for getting IPv6 destination address") GST_WARNING_OBJECT (src, "No API available for getting IPv6 destination " "address, will receive packets for every destination to our port"); #endif } } if (src->socket_timestamp_mode == GST_SOCKET_TIMESTAMP_MODE_REALTIME) { #ifdef SO_TIMESTAMPNS if (!g_socket_set_option (src->used_socket, SOL_SOCKET, SO_TIMESTAMPNS, TRUE, &err)) { GST_WARNING_OBJECT (src, "Failed to enable socket control message timestamps: %s", err->message); g_clear_error (&err); src->socket_timestamp_mode = GST_SOCKET_TIMESTAMP_MODE_DISABLED; g_object_notify (G_OBJECT (src), "socket-timestamp"); } else { GST_LOG_OBJECT (src, "Socket control message timestamps enabled"); } } #else GST_WARNING_OBJECT (src, "socket-timestamp was requested but SO_TIMESTAMPNS is not defined"); } #endif /* NOTE: sockaddr_in.sin_port works for ipv4 and ipv6 because sin_port * follows ss_family on both */ { GInetSocketAddress *addr; guint16 port; addr = G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket, &err)); if (!addr) goto getsockname_error; port = g_inet_socket_address_get_port (addr); 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"); } g_object_unref (addr); } return TRUE; /* ERRORS */ name_resolve: { return FALSE; } no_socket: { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), ("no socket error: %s", err->message)); g_clear_error (&err); g_object_unref (addr); return FALSE; } bind_error: { GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL), ("bind failed: %s", err->message)); g_clear_error (&err); g_object_unref (bind_saddr); gst_udpsrc_close (src); return FALSE; } membership: { GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL), ("could not add membership: %s", err->message)); g_clear_error (&err); gst_udpsrc_close (src); return FALSE; } getsockname_error: { GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL), ("getsockname failed: %s", err->message)); g_clear_error (&err); gst_udpsrc_close (src); return FALSE; } } static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc) { GstUDPSrc *src; src = GST_UDPSRC (bsrc); GST_LOG_OBJECT (src, "Flushing"); GST_OBJECT_LOCK (src); g_cancellable_cancel (src->cancellable); GST_OBJECT_UNLOCK (src); return TRUE; } static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc) { GstUDPSrc *src; src = GST_UDPSRC (bsrc); GST_LOG_OBJECT (src, "No longer flushing"); GST_OBJECT_LOCK (src); gst_udpsrc_free_cancellable (src); gst_udpsrc_create_cancellable (src); GST_OBJECT_UNLOCK (src); return TRUE; } static gboolean gst_udpsrc_close (GstUDPSrc * src) { GST_DEBUG ("closing sockets"); if (src->used_socket) { if (src->auto_multicast && g_inet_address_get_is_multicast (g_inet_socket_address_get_address (src->addr))) { GError *err = NULL; GList *iter; if (src->multi_iface) { GStrv multi_ifaces = g_strsplit (src->multi_iface, ",", -1); gchar **ifaces = multi_ifaces; while (*ifaces) { g_strstrip (*ifaces); GST_DEBUG_OBJECT (src, "leaving multicast group %s interface %s", src->address, *ifaces); if (!src->source_addrs) { if (!g_socket_leave_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, *ifaces, &err)) { GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s", err->message); g_clear_error (&err); } } else { for (iter = src->source_addrs; iter; iter = g_list_next (iter)) { GInetAddress *source_addr = (GInetAddress *) iter->data; if (!g_socket_leave_multicast_group_ssm (src->used_socket, g_inet_socket_address_get_address (src->addr), source_addr, *ifaces, &err)) { GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s", err->message); g_clear_error (&err); } } } ifaces++; } g_strfreev (multi_ifaces); } else { GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->address); if (!src->source_addrs) { if (!g_socket_leave_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, NULL, &err)) { GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s", err->message); g_clear_error (&err); } } else { for (iter = src->source_addrs; iter; iter = g_list_next (iter)) { GInetAddress *source_addr = (GInetAddress *) iter->data; if (!g_socket_leave_multicast_group_ssm (src->used_socket, g_inet_socket_address_get_address (src->addr), source_addr, NULL, &err)) { GST_ERROR_OBJECT (src, "Failed to leave multicast group: %s", err->message); g_clear_error (&err); } } } } } if (src->close_socket || !src->external_socket) { GError *err = NULL; if (!g_socket_close (src->used_socket, &err)) { GST_ERROR_OBJECT (src, "Failed to close socket: %s", err->message); g_clear_error (&err); } } if (src->source_addrs) { g_list_free_full (src->source_addrs, (GDestroyNotify) g_object_unref); src->source_addrs = NULL; } g_object_unref (src->used_socket); src->used_socket = NULL; g_object_unref (src->addr); src->addr = NULL; } gst_udpsrc_free_cancellable (src); return TRUE; } static GstStateChangeReturn gst_udpsrc_change_state (GstElement * element, GstStateChange transition) { GstUDPSrc *src; GstStateChangeReturn result; src = GST_UDPSRC (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: if (!gst_udpsrc_open (src)) goto open_failed; break; default: break; } if ((result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition)) == GST_STATE_CHANGE_FAILURE) goto failure; switch (transition) { case GST_STATE_CHANGE_READY_TO_NULL: gst_udpsrc_close (src); break; default: break; } return result; /* ERRORS */ open_failed: { GST_DEBUG_OBJECT (src, "failed to open socket"); return GST_STATE_CHANGE_FAILURE; } failure: { GST_DEBUG_OBJECT (src, "parent failed state change"); return result; } } /*** GSTURIHANDLER INTERFACE *************************************************/ static GstURIType gst_udpsrc_uri_get_type (GType type) { return GST_URI_SRC; } static const gchar *const * gst_udpsrc_uri_get_protocols (GType type) { static const gchar *protocols[] = { "udp", NULL }; return protocols; } static gchar * gst_udpsrc_uri_get_uri (GstURIHandler * handler) { GstUDPSrc *src = GST_UDPSRC (handler); return g_strdup (src->uri); } static gboolean gst_udpsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri, GError ** error) { return gst_udpsrc_set_uri (GST_UDPSRC (handler), uri, error); } 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; }