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;
}
}
