static gboolean is_multicast_address (const gchar * host_name) { GInetAddress *addr; GResolver *resolver = NULL; gboolean ret = FALSE; addr = g_inet_address_new_from_string (host_name); if (!addr) { GList *results; resolver = g_resolver_get_default (); results = g_resolver_lookup_by_name (resolver, host_name, NULL, NULL); if (!results) goto out; addr = G_INET_ADDRESS (g_object_ref (results->data)); g_resolver_free_addresses (results); } g_assert (addr != NULL); ret = g_inet_address_get_is_multicast (addr); out: if (resolver) g_object_unref (resolver); if (addr) g_object_unref (addr); return ret; }
static gboolean gst_multiudpsink_configure_client (GstMultiUDPSink * sink, GstUDPClient * client) { GInetSocketAddress *saddr = G_INET_SOCKET_ADDRESS (client->addr); GInetAddress *addr = g_inet_socket_address_get_address (saddr); GSocketFamily family = g_socket_address_get_family (G_SOCKET_ADDRESS (saddr)); GSocket *socket; GError *err = NULL; GST_DEBUG_OBJECT (sink, "configuring client %p", client); if (family == G_SOCKET_FAMILY_IPV6 && !sink->used_socket_v6) goto invalid_family; /* Select socket to send from for this address */ if (family == G_SOCKET_FAMILY_IPV6 || !sink->used_socket) socket = sink->used_socket_v6; else socket = sink->used_socket; if (g_inet_address_get_is_multicast (addr)) { GST_DEBUG_OBJECT (sink, "we have a multicast client %p", client); if (sink->auto_multicast) { GST_DEBUG_OBJECT (sink, "autojoining group"); if (!g_socket_join_multicast_group (socket, addr, FALSE, sink->multi_iface, &err)) goto join_group_failed; } GST_DEBUG_OBJECT (sink, "setting loop to %d", sink->loop); g_socket_set_multicast_loopback (socket, sink->loop); GST_DEBUG_OBJECT (sink, "setting ttl to %d", sink->ttl_mc); g_socket_set_multicast_ttl (socket, sink->ttl_mc); } else { GST_DEBUG_OBJECT (sink, "setting unicast ttl to %d", sink->ttl); g_socket_set_ttl (socket, sink->ttl); } return TRUE; /* ERRORS */ join_group_failed: { gst_multiudpsink_stop (GST_BASE_SINK (sink)); GST_ELEMENT_ERROR (sink, RESOURCE, SETTINGS, (NULL), ("Could not join multicast group: %s", err ? err->message : "unknown reason")); g_clear_error (&err); return FALSE; } invalid_family: { gst_multiudpsink_stop (GST_BASE_SINK (sink)); GST_ELEMENT_ERROR (sink, RESOURCE, SETTINGS, (NULL), ("Invalid address family (got %d)", family)); return FALSE; } }
gboolean address_seems_public (GInetAddress *addr) { return (g_inet_address_get_is_loopback (addr) == FALSE && g_inet_address_get_is_site_local (addr) == FALSE && g_inet_address_get_is_multicast (addr) == FALSE && g_inet_address_get_is_mc_link_local (addr) == FALSE && g_inet_address_get_is_mc_node_local (addr) == FALSE && g_inet_address_get_is_mc_site_local (addr) == FALSE && g_inet_address_get_is_mc_org_local (addr) == FALSE && g_inet_address_get_is_mc_global (addr) == FALSE); }
static gboolean gst_udpsrc_stop (GstBaseSrc * bsrc) { GstUDPSrc *src; src = GST_UDPSRC (bsrc); GST_DEBUG ("stopping, 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; GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->host); if (!g_socket_leave_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, src->multi_iface, &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); } } g_object_unref (src->used_socket); src->used_socket = NULL; g_object_unref (src->addr); src->addr = NULL; } 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; GST_DEBUG_OBJECT (src, "leaving multicast group %s", src->address); if (!g_socket_leave_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, src->multi_iface, &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); } } g_object_unref (src->used_socket); src->used_socket = NULL; g_object_unref (src->addr); src->addr = NULL; } gst_udpsrc_reset_memory_allocator (src); gst_udpsrc_free_cancellable (src); return TRUE; }
static gboolean fill_address (const gchar * address, guint16 port, Addr * addr, gboolean is_multicast) { GInetAddress *inet; inet = g_inet_address_new_from_string (address); if (inet == NULL) return FALSE; if (is_multicast != g_inet_address_get_is_multicast (inet)) { g_object_unref (inet); return FALSE; } addr->size = g_inet_address_get_native_size (inet); memcpy (addr->bytes, g_inet_address_to_bytes (inet), addr->size); g_object_unref (inet); addr->port = port; return TRUE; }
static gboolean gst_multiudpsink_configure_client (GstMultiUDPSink * sink, GstUDPClient * client) { GInetSocketAddress *saddr = G_INET_SOCKET_ADDRESS (client->addr); GInetAddress *addr = g_inet_socket_address_get_address (saddr); GError *err = NULL; GST_DEBUG_OBJECT (sink, "configuring client %p", client); if (g_inet_address_get_is_multicast (addr)) { GST_DEBUG_OBJECT (sink, "we have a multicast client %p", client); if (sink->auto_multicast) { GST_DEBUG_OBJECT (sink, "autojoining group"); if (!g_socket_join_multicast_group (sink->used_socket, addr, FALSE, NULL, &err)) goto join_group_failed; } GST_DEBUG_OBJECT (sink, "setting loop to %d", sink->loop); g_socket_set_multicast_loopback (sink->used_socket, sink->loop); GST_DEBUG_OBJECT (sink, "setting ttl to %d", sink->ttl_mc); g_socket_set_multicast_ttl (sink->used_socket, sink->ttl_mc); } else { GST_DEBUG_OBJECT (sink, "setting unicast ttl to %d", sink->ttl); g_socket_set_ttl (sink->used_socket, sink->ttl); } return TRUE; /* ERRORS */ join_group_failed: { gst_multiudpsink_stop (GST_BASE_SINK (sink)); GST_ELEMENT_ERROR (sink, RESOURCE, SETTINGS, (NULL), ("Could not join multicast group: %s", err->message)); g_clear_error (&err); return FALSE; } }
/* create a socket for sending to remote machine */ static gboolean gst_udpsrc_start (GstBaseSrc * bsrc) { GstUDPSrc *src; GInetAddress *addr, *bind_addr; GSocketAddress *bind_saddr; GResolver *resolver; GError *err = NULL; src = GST_UDPSRC (bsrc); if (src->socket == NULL) { /* need to allocate a socket */ GST_DEBUG_OBJECT (src, "allocating socket for %s:%d", src->host, src->port); addr = g_inet_address_new_from_string (src->host); if (!addr) { GList *results; GST_DEBUG_OBJECT (src, "resolving IP address for host %s", src->host); resolver = g_resolver_get_default (); results = g_resolver_lookup_by_name (resolver, src->host, 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", src->host, ip); g_free (ip); } #endif 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); 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 (!g_socket_bind (src->used_socket, bind_saddr, src->reuse, &err)) goto bind_error; g_object_unref (bind_saddr); } else { 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; if (src->addr) g_object_unref (src->addr); src->addr = G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket, &err)); if (!src->addr) goto getsockname_error; } #if GLIB_CHECK_VERSION (2, 35, 7) { gint val = 0; if (src->buffer_size != 0) { GError *opt_err = NULL; 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_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL), ("Could not create a buffer of requested %d bytes: %s", src->buffer_size, opt_err->message)); g_error_free (opt_err); opt_err = NULL; } } /* 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_INFO_OBJECT (src, "have udp buffer of %d bytes", val); } else { GST_DEBUG_OBJECT (src, "could not get udp buffer size"); } } #elif defined (SO_RCVBUF) { gint rcvsize, ret; socklen_t len; 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 (g_socket_get_fd (src->used_socket), 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 (g_socket_get_fd (src->used_socket), 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"); } #else if (src->buffer_size != 0) { GST_WARNING_OBJECT (src, "don't know how to set udp buffer size on this " "OS. Consider upgrading your GLib to >= 2.35.7 and re-compiling the " "GStreamer udp plugin"); } #endif 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))) { GST_DEBUG_OBJECT (src, "joining multicast group %s", src->host); if (!g_socket_join_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, src->multi_iface, &err)) goto membership; } /* 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: { GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL), ("Name resolval failed: %s", err->message)); g_clear_error (&err); g_object_unref (resolver); 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_stop (GST_BASE_SRC (src)); return FALSE; } membership: { GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL), ("could add membership: %s", err->message)); g_clear_error (&err); gst_udpsrc_stop (GST_BASE_SRC (src)); return FALSE; } getsockname_error: { GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL), ("getsockname failed: %s", err->message)); g_clear_error (&err); gst_udpsrc_stop (GST_BASE_SRC (src)); return FALSE; } }
void gst_multiudpsink_remove (GstMultiUDPSink * sink, const gchar * host, gint port) { GList *find; GstUDPClient udpclient; GstUDPClient *client; GTimeVal now; udpclient.host = (gchar *) host; udpclient.port = port; g_mutex_lock (&sink->client_lock); find = g_list_find_custom (sink->clients, &udpclient, (GCompareFunc) client_compare); if (!find) goto not_found; client = (GstUDPClient *) find->data; GST_DEBUG_OBJECT (sink, "found %d clients with host %s, port %d", client->refcount, host, port); client->refcount--; if (client->refcount == 0) { GInetSocketAddress *saddr = G_INET_SOCKET_ADDRESS (client->addr); GInetAddress *addr = g_inet_socket_address_get_address (saddr); GSocketFamily family = g_socket_address_get_family (G_SOCKET_ADDRESS (saddr)); GSocket *socket; /* Select socket to send from for this address */ if (family == G_SOCKET_FAMILY_IPV6 || !sink->used_socket) socket = sink->used_socket_v6; else socket = sink->used_socket; GST_DEBUG_OBJECT (sink, "remove client with host %s, port %d", host, port); g_get_current_time (&now); client->disconnect_time = GST_TIMEVAL_TO_TIME (now); if (socket && sink->auto_multicast && g_inet_address_get_is_multicast (addr)) { GError *err = NULL; if (!g_socket_leave_multicast_group (socket, addr, FALSE, sink->multi_iface, &err)) { GST_DEBUG_OBJECT (sink, "Failed to leave multicast group: %s", err->message); g_clear_error (&err); } } /* Unlock to emit signal before we delete the actual client */ g_mutex_unlock (&sink->client_lock); g_signal_emit (G_OBJECT (sink), gst_multiudpsink_signals[SIGNAL_CLIENT_REMOVED], 0, host, port); g_mutex_lock (&sink->client_lock); sink->clients = g_list_delete_link (sink->clients, find); free_client (client); } g_mutex_unlock (&sink->client_lock); return; /* ERRORS */ not_found: { g_mutex_unlock (&sink->client_lock); GST_WARNING_OBJECT (sink, "client at host %s, port %d not found", host, port); return; } }
/* 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; 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); /* On Windows it's not possible to bind to a multicast address * but the OS will make sure to filter out all packets that * arrive not for the multicast address the socket joined. * * On Linux and others it is necessary to bind to a multicast * address to let the OS filter out all packets that are received * on the same port but for different addresses than the multicast * address */ #ifdef G_OS_WIN32 if (g_inet_address_get_is_multicast (addr)) bind_addr = g_inet_address_new_any (g_inet_address_get_family (addr)); else #endif 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 (!g_socket_bind (src->used_socket, bind_saddr, src->reuse, &err)) goto bind_error; g_object_unref (bind_saddr); } else { 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; if (src->addr) g_object_unref (src->addr); src->addr = G_INET_SOCKET_ADDRESS (g_socket_get_local_address (src->used_socket, &err)); if (!src->addr) goto getsockname_error; } #if GLIB_CHECK_VERSION (2, 35, 7) { gint val = 0; if (src->buffer_size != 0) { GError *opt_err = NULL; 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_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL), ("Could not create a buffer of requested %d bytes: %s", src->buffer_size, opt_err->message)); g_error_free (opt_err); opt_err = NULL; } } /* 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_INFO_OBJECT (src, "have udp buffer of %d bytes", val); } else { GST_DEBUG_OBJECT (src, "could not get udp buffer size"); } } #elif defined (SO_RCVBUF) { gint rcvsize, ret; socklen_t len; 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 (g_socket_get_fd (src->used_socket), 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 (g_socket_get_fd (src->used_socket), 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"); } #else if (src->buffer_size != 0) { GST_WARNING_OBJECT (src, "don't know how to set udp buffer size on this " "OS. Consider upgrading your GLib to >= 2.35.7 and re-compiling the " "GStreamer udp plugin"); } #endif 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))) { GST_DEBUG_OBJECT (src, "joining multicast group %s", src->address); if (!g_socket_join_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, src->multi_iface, &err)) goto membership; } /* 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); } src->allocator = NULL; gst_allocation_params_init (&src->params); src->max_size = 0; 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 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; } }
/* 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; 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); /* On Windows it's not possible to bind to a multicast address * but the OS will make sure to filter out all packets that * arrive not for the multicast address the socket joined. * * On Linux and others it is necessary to bind to a multicast * address to let the OS filter out all packets that are received * on the same port but for different addresses than the multicast * address */ #ifdef G_OS_WIN32 if (g_inet_address_get_is_multicast (addr)) bind_addr = g_inet_address_new_any (g_inet_address_get_family (addr)); else #endif 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 (!g_socket_bind (src->used_socket, bind_saddr, src->reuse, &err)) 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; /* See above for the reasons. Without this we would behave different on * Windows and Linux, joining multicast groups below for provided sockets * on Linux but not on Windows */ #ifdef G_OS_WIN32 addr = gst_udpsrc_resolve (src, src->address); if (!addr) goto name_resolve; 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); #endif if (src->addr) g_object_unref (src->addr); src->addr = local_addr; #ifdef G_OS_WIN32 } 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); } #endif } { gint val = 0; if (src->buffer_size != 0) { GError *opt_err = NULL; 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_ELEMENT_WARNING (src, RESOURCE, SETTINGS, (NULL), ("Could not create a buffer of requested %d bytes: %s", src->buffer_size, opt_err->message)); g_error_free (opt_err); opt_err = NULL; } } /* 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_INFO_OBJECT (src, "have udp buffer of %d bytes", val); } else { GST_DEBUG_OBJECT (src, "could not get udp buffer size"); } } 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))) { GST_DEBUG_OBJECT (src, "joining multicast group %s", src->address); if (!g_socket_join_multicast_group (src->used_socket, g_inet_socket_address_get_address (src->addr), FALSE, src->multi_iface, &err)) goto membership; } /* 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); } src->allocator = NULL; gst_allocation_params_init (&src->params); src->max_size = 0; 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 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; } }