/* GStreamer * Copyright (C) <2005> Wim Taymans * Copyright (C) <2005> Nokia Corporation * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-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. * * Examples * * Here is a simple pipeline to read from the default port and dump the udp packets. * * gst-launch -v udpsrc ! fakesink dump=1 * * 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 -v audiotestsrc ! udpsink * * * * The udpsrc element supports automatic port allocation by setting the * "port" property to 0. the following pipeline reads UDP from a free port. * * gst-launch -v udpsrc port=0 ! fakesink * * 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 multicast_group property * to the IP address of the multicast group. * * * Alternatively one can provide a custom socket to udpsrc with the "sockfd" property, * udpsrc will then not allocate a socket itself but use the provided one. * * * The "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 usefull for RTP * implementations where the contents of the UDP packets is transfered out-of-bounds * using SDP or other means. * * * The "buffer" property is used to change the default kernel buffer sizes 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 "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 upstream 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 timeout property is set to a * value bigger than 0, udpsrc will generate an element message named * "GstUDPSrcTimeout" * if no data was recieved in the given timeout. * The message's structure contains one field: * * * * #guint64 * "timeout": the timeout in microseconds 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 * sockfd property. The socket will be * closed when setting the element to READY by default. This behaviour can be * overriden with the closefd property, * in which case the application is responsible for closing the file descriptor. * * * Last reviewed on 2007-09-20 (0.10.7) * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstudpsrc.h" #ifdef HAVE_UNISTD_H #include #endif #include #if defined _MSC_VER && (_MSC_VER >= 1400) #include #endif #include #ifdef G_OS_WIN32 typedef int socklen_t; #endif #ifdef HAVE_FIONREAD_IN_SYS_FILIO #include #endif 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); static const GstElementDetails gst_udpsrc_details = GST_ELEMENT_DETAILS ("UDP packet receiver", "Source/Network", "Receive data over the network via UDP", "Wim Taymans \n" "Thijs Vermeir "); #define UDP_DEFAULT_PORT 4951 #define UDP_DEFAULT_MULTICAST_GROUP "0.0.0.0" #define UDP_DEFAULT_URI "udp://"UDP_DEFAULT_MULTICAST_GROUP":"G_STRINGIFY(UDP_DEFAULT_PORT) #define UDP_DEFAULT_CAPS NULL #define UDP_DEFAULT_SOCKFD -1 #define UDP_DEFAULT_BUFFER_SIZE 0 #define UDP_DEFAULT_TIMEOUT 0 #define UDP_DEFAULT_SKIP_FIRST_BYTES 0 #define UDP_DEFAULT_CLOSEFD TRUE #define UDP_DEFAULT_SOCK -1 #define UDP_DEFAULT_AUTO_MULTICAST TRUE enum { PROP_0, PROP_PORT, PROP_MULTICAST_GROUP, PROP_URI, PROP_CAPS, PROP_SOCKFD, PROP_BUFFER_SIZE, PROP_TIMEOUT, PROP_SKIP_FIRST_BYTES, PROP_CLOSEFD, PROP_SOCK, PROP_AUTO_MULTICAST, PROP_LAST }; #define CLOSE_IF_REQUESTED(udpctx) \ G_STMT_START { \ if ((!udpctx->externalfd) || (udpctx->externalfd && udpctx->closefd)) { \ CLOSE_SOCKET(udpctx->sock.fd); \ if (udpctx->sock.fd == udpctx->sockfd) \ udpctx->sockfd = UDP_DEFAULT_SOCKFD; \ } \ udpctx->sock.fd = UDP_DEFAULT_SOCK; \ } G_STMT_END static void gst_udpsrc_uri_handler_init (gpointer g_iface, gpointer iface_data); static GstCaps *gst_udpsrc_getcaps (GstBaseSrc * src); static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf); static gboolean gst_udpsrc_start (GstBaseSrc * bsrc); static gboolean gst_udpsrc_stop (GstBaseSrc * bsrc); static gboolean gst_udpsrc_unlock (GstBaseSrc * bsrc); static gboolean gst_udpsrc_unlock_stop (GstBaseSrc * bsrc); 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 void _do_init (GType type) { static const GInterfaceInfo urihandler_info = { gst_udpsrc_uri_handler_init, NULL, NULL }; g_type_add_interface_static (type, GST_TYPE_URI_HANDLER, &urihandler_info); GST_DEBUG_CATEGORY_INIT (udpsrc_debug, "udpsrc", 0, "UDP src"); } GST_BOILERPLATE_FULL (GstUDPSrc, gst_udpsrc, GstPushSrc, GST_TYPE_PUSH_SRC, _do_init); static void gst_udpsrc_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_template)); gst_element_class_set_details (element_class, &gst_udpsrc_details); } static void gst_udpsrc_class_init (GstUDPSrcClass * klass) { GObjectClass *gobject_class; GstBaseSrcClass *gstbasesrc_class; GstPushSrcClass *gstpushsrc_class; gobject_class = (GObjectClass *) klass; gstbasesrc_class = (GstBaseSrcClass *) klass; gstpushsrc_class = (GstPushSrcClass *) klass; 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_object_class_install_property (gobject_class, PROP_MULTICAST_GROUP, g_param_spec_string ("multicast_group", "Multicast Group", "The Address of multicast group to join", UDP_DEFAULT_MULTICAST_GROUP, G_PARAM_READWRITE)); 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_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_object_class_install_property (gobject_class, PROP_SOCKFD, g_param_spec_int ("sockfd", "Socket Handle", "Socket to use for UDP reception. (-1 == allocate)", -1, G_MAXINT, UDP_DEFAULT_SOCKFD, G_PARAM_READWRITE)); 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_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMEOUT, g_param_spec_uint64 ("timeout", "Timeout", "Post a message after timeout microseconds (0 = disabled)", 0, G_MAXUINT64, UDP_DEFAULT_TIMEOUT, G_PARAM_READWRITE)); 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_object_class_install_property (gobject_class, PROP_CLOSEFD, g_param_spec_boolean ("closefd", "Close sockfd", "Close sockfd if passed as property on state change", UDP_DEFAULT_CLOSEFD, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_SOCK, g_param_spec_int ("sock", "Socket Handle", "Socket currently in use for UDP reception. (-1 = no socket)", -1, G_MAXINT, UDP_DEFAULT_SOCK, G_PARAM_READABLE)); 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)); gstbasesrc_class->start = gst_udpsrc_start; gstbasesrc_class->stop = gst_udpsrc_stop; gstbasesrc_class->unlock = gst_udpsrc_unlock; gstbasesrc_class->unlock_stop = gst_udpsrc_unlock_stop; gstbasesrc_class->get_caps = gst_udpsrc_getcaps; gstpushsrc_class->create = gst_udpsrc_create; } static void gst_udpsrc_init (GstUDPSrc * udpsrc, GstUDPSrcClass * g_class) { WSA_STARTUP (udpsrc); udpsrc->port = UDP_DEFAULT_PORT; udpsrc->sockfd = UDP_DEFAULT_SOCKFD; udpsrc->multi_group = g_strdup (UDP_DEFAULT_MULTICAST_GROUP); udpsrc->uri = g_strdup (UDP_DEFAULT_URI); udpsrc->buffer_size = UDP_DEFAULT_BUFFER_SIZE; udpsrc->timeout = UDP_DEFAULT_TIMEOUT; udpsrc->skip_first_bytes = UDP_DEFAULT_SKIP_FIRST_BYTES; udpsrc->closefd = UDP_DEFAULT_CLOSEFD; udpsrc->externalfd = (udpsrc->sockfd != -1); udpsrc->auto_multicast = UDP_DEFAULT_AUTO_MULTICAST; udpsrc->sock.fd = UDP_DEFAULT_SOCK; /* 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); g_free (udpsrc->multi_group); g_free (udpsrc->uri); if (udpsrc->sockfd >= 0 && udpsrc->closefd) CLOSE_SOCKET (udpsrc->sockfd); WSA_CLEANUP (object); G_OBJECT_CLASS (parent_class)->finalize (object); } static GstCaps * gst_udpsrc_getcaps (GstBaseSrc * src) { GstUDPSrc *udpsrc; udpsrc = GST_UDPSRC (src); if (udpsrc->caps) return gst_caps_ref (udpsrc->caps); else return gst_caps_new_any (); } static GstFlowReturn gst_udpsrc_create (GstPushSrc * psrc, GstBuffer ** buf) { GstUDPSrc *udpsrc; GstNetBuffer *outbuf; struct sockaddr_storage tmpaddr; socklen_t len; guint8 *pktdata; gint pktsize; #ifdef G_OS_UNIX gint readsize; #elif defined G_OS_WIN32 gulong readsize; #endif GstClockTime timeout; gint ret; gboolean try_again; udpsrc = GST_UDPSRC_CAST (psrc); retry: /* quick check, avoid going in select when we already have data */ readsize = 0; if (G_UNLIKELY ((ret = IOCTL_SOCKET (udpsrc->sock.fd, FIONREAD, &readsize)) < 0)) goto ioctl_failed; if (readsize > 0) goto no_select; if (udpsrc->timeout > 0) { timeout = udpsrc->timeout * GST_USECOND; } else { timeout = GST_CLOCK_TIME_NONE; } do { try_again = FALSE; GST_LOG_OBJECT (udpsrc, "doing select, timeout %" G_GUINT64_FORMAT, udpsrc->timeout); 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)) goto retry; no_select: GST_LOG_OBJECT (udpsrc, "ioctl says %d bytes available", (int) readsize); pktdata = g_malloc (readsize); pktsize = readsize; while (TRUE) { len = sizeof (struct sockaddr); #ifdef G_OS_WIN32 ret = recvfrom (udpsrc->sock.fd, (char *) pktdata, pktsize, #else ret = recvfrom (udpsrc->sock.fd, pktdata, pktsize, #endif 0, (struct sockaddr *) &tmpaddr, &len); 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 (tmpaddr.ss_family) { case AF_INET: { gst_netaddress_set_ip4_address (&outbuf->from, ((struct sockaddr_in *) &tmpaddr)->sin_addr.s_addr, ((struct sockaddr_in *) &tmpaddr)->sin_port); } break; case AF_INET6: { guint8 ip6[16]; memcpy (ip6, &((struct sockaddr_in6 *) &tmpaddr)->sin6_addr, sizeof (ip6)); gst_netaddress_set_ip6_address (&outbuf->from, ip6, ((struct sockaddr_in *) &tmpaddr)->sin_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: { g_free (protocol); GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("error parsing uri %s: wrong protocol (%s != udp)", uri, 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_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_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; 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)); } 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); 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 %d: %s (%d)", ret, g_strerror (errno), errno)); 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; }