static gssize
socket_send_message (NiceSocket *sock,
const NiceOutputMessage *message, gboolean reliable)
{
TcpPriv *priv = sock->priv;
gssize ret;
GError *gerr = NULL;
gsize message_len;
/* Socket has been closed: */
if (sock->priv == NULL)
return -1;
/* Don't try to access the socket if it had an error, otherwise we risk a
* crash with SIGPIPE (Broken pipe) */
if (priv->error)
return -1;
message_len = output_message_get_size (message);
/* First try to send the data, don't send it later if it can be sent now
* this way we avoid allocating memory on every send */
if (g_queue_is_empty (&priv->send_queue)) {
ret = g_socket_send_message (sock->fileno, NULL, message->buffers,
message->n_buffers, NULL, 0, G_SOCKET_MSG_NONE, NULL, &gerr);
if (ret < 0) {
if (g_error_matches (gerr, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK) ||
g_error_matches (gerr, G_IO_ERROR, G_IO_ERROR_FAILED)) {
/* Queue the message and send it later. */
nice_socket_queue_send_with_callback (&priv->send_queue,
message, 0, message_len, FALSE, sock->fileno, &priv->io_source,
priv->context, (GSourceFunc) socket_send_more, sock);
ret = message_len;
}
g_error_free (gerr);
} else if ((gsize) ret < message_len) {
/* Partial send. */
nice_socket_queue_send_with_callback (&priv->send_queue,
message, ret, message_len, TRUE, sock->fileno, &priv->io_source,
priv->context, (GSourceFunc) socket_send_more, sock);
ret = message_len;
}
} else {
/* Only queue if we're sending reliably */
if (reliable) {
/* Queue the message and send it later. */
nice_socket_queue_send_with_callback (&priv->send_queue,
message, 0, message_len, FALSE, sock->fileno, &priv->io_source,
priv->context, (GSourceFunc) socket_send_more, sock);
ret = message_len;
} else {
/* non reliable send, so we shouldn't queue the message */
ret = 0;
}
}
return ret;
}
static gboolean
socket_send_more (
GSocket *gsocket,
GIOCondition condition,
gpointer data)
{
NiceSocket *sock = (NiceSocket *) data;
TcpPriv *priv = sock->priv;
struct to_be_sent *tbs = NULL;
GError *gerr = NULL;
agent_lock ();
if (g_source_is_destroyed (g_main_current_source ())) {
nice_debug ("Source was destroyed. "
"Avoided race condition in tcp-bsd.c:socket_send_more");
agent_unlock ();
return FALSE;
}
while ((tbs = g_queue_pop_head (&priv->send_queue)) != NULL) {
int ret;
if(condition & G_IO_HUP) {
/* connection hangs up */
ret = -1;
} else {
GOutputVector local_bufs = { tbs->buf, tbs->length };
ret = g_socket_send_message (sock->fileno, NULL, &local_bufs, 1, NULL, 0,
G_SOCKET_MSG_NONE, NULL, &gerr);
}
if (ret < 0) {
if (g_error_matches (gerr, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK)) {
GOutputVector local_buf = { tbs->buf, tbs->length };
NiceOutputMessage local_message = {&local_buf, 1};
add_to_be_sent (sock, &local_message, 0, local_buf.size, TRUE);
free_to_be_sent (tbs);
g_error_free (gerr);
break;
}
g_clear_error (&gerr);
} else if (ret < (int) tbs->length) {
GOutputVector local_buf = { tbs->buf + ret, tbs->length - ret };
NiceOutputMessage local_message = {&local_buf, 1};
add_to_be_sent (sock, &local_message, 0, local_buf.size, TRUE);
free_to_be_sent (tbs);
break;
}
free_to_be_sent (tbs);
}
if (g_queue_is_empty (&priv->send_queue)) {
g_source_destroy (priv->io_source);
g_source_unref (priv->io_source);
priv->io_source = NULL;
agent_unlock ();
return FALSE;
}
agent_unlock ();
return TRUE;
}
static gssize
socket_send_message (NiceSocket *sock, const NiceOutputMessage *message)
{
TcpPriv *priv = sock->priv;
gssize ret;
GError *gerr = NULL;
gsize message_len;
/* Don't try to access the socket if it had an error, otherwise we risk a
* crash with SIGPIPE (Broken pipe) */
if (priv->error)
return -1;
message_len = output_message_get_size (message);
/* First try to send the data, don't send it later if it can be sent now
* this way we avoid allocating memory on every send */
if (g_queue_is_empty (&priv->send_queue)) {
ret = g_socket_send_message (sock->fileno, NULL, message->buffers,
message->n_buffers, NULL, 0, G_SOCKET_MSG_NONE, NULL, &gerr);
if (ret < 0) {
if (g_error_matches (gerr, G_IO_ERROR, G_IO_ERROR_WOULD_BLOCK) ||
g_error_matches (gerr, G_IO_ERROR, G_IO_ERROR_FAILED)) {
/* Queue the message and send it later. */
add_to_be_sent (sock, message, 0, message_len, FALSE);
ret = message_len;
}
g_error_free (gerr);
} else if ((gsize) ret < message_len) {
/* Partial send. */
add_to_be_sent (sock, message, ret, message_len, TRUE);
ret = message_len;
}
} else {
/* FIXME: This dropping will break http/socks5/etc
* We probably need a way to the upper layer to control reliability
*/
/* If the queue is too long, drop whatever packets we can. */
if (g_queue_get_length (&priv->send_queue) >= MAX_QUEUE_LENGTH) {
guint peek_idx = 0;
struct to_be_sent *tbs = NULL;
while ((tbs = g_queue_peek_nth (&priv->send_queue, peek_idx)) != NULL) {
if (tbs->can_drop) {
tbs = g_queue_pop_nth (&priv->send_queue, peek_idx);
free_to_be_sent (tbs);
break;
} else {
peek_idx++;
}
}
}
/* Queue the message and send it later. */
add_to_be_sent (sock, message, 0, message_len, FALSE);
ret = message_len;
}
return ret;
}
static GstFlowReturn
gst_multiudpsink_render (GstBaseSink * bsink, GstBuffer * buffer)
{
GstMultiUDPSink *sink;
GList *clients;
GOutputVector *vec;
GstMapInfo *map;
guint n_mem, i;
gsize size;
GstMemory *mem;
gint num, no_clients;
GError *err = NULL;
sink = GST_MULTIUDPSINK (bsink);
n_mem = gst_buffer_n_memory (buffer);
if (n_mem == 0)
goto no_data;
/* allocated on the stack, the max number of memory blocks is limited so this
* should not cause stack overflows */
vec = sink->vec;
map = sink->map;
size = 0;
for (i = 0; i < n_mem; i++) {
mem = gst_buffer_get_memory (buffer, i);
gst_memory_map (mem, &map[i], GST_MAP_READ);
vec[i].buffer = map[i].data;
vec[i].size = map[i].size;
size += map[i].size;
}
sink->bytes_to_serve += size;
/* grab lock while iterating and sending to clients, this should be
* fast as UDP never blocks */
g_mutex_lock (&sink->client_lock);
GST_LOG_OBJECT (bsink, "about to send %" G_GSIZE_FORMAT " bytes in %u blocks",
size, n_mem);
no_clients = 0;
num = 0;
for (clients = sink->clients; clients; clients = g_list_next (clients)) {
GstUDPClient *client;
GSocket *socket;
GSocketFamily family;
gint count;
client = (GstUDPClient *) clients->data;
no_clients++;
GST_LOG_OBJECT (sink, "sending %" G_GSIZE_FORMAT " bytes to client %p",
size, client);
family = g_socket_address_get_family (G_SOCKET_ADDRESS (client->addr));
/* 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;
count = sink->send_duplicates ? client->refcount : 1;
while (count--) {
gssize ret;
ret =
g_socket_send_message (socket, client->addr, vec, n_mem,
NULL, 0, 0, sink->cancellable, &err);
if (G_UNLIKELY (ret < 0)) {
if (g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED))
goto flushing;
/* we continue after posting a warning, next packets might be ok
* again */
if (size > UDP_MAX_SIZE) {
GST_ELEMENT_WARNING (sink, RESOURCE, WRITE,
("Attempting to send a UDP packet larger than maximum size "
"(%" G_GSIZE_FORMAT " > %d)", size, UDP_MAX_SIZE),
("Reason: %s", err ? err->message : "unknown reason"));
} else {
GST_ELEMENT_WARNING (sink, RESOURCE, WRITE,
("Error sending UDP packet"), ("Reason: %s",
err ? err->message : "unknown reason"));
}
g_clear_error (&err);
} else {
num++;
client->bytes_sent += ret;
client->packets_sent++;
sink->bytes_served += ret;
}
}
}
g_mutex_unlock (&sink->client_lock);
/* unmap all memory again */
for (i = 0; i < n_mem; i++) {
gst_memory_unmap (map[i].memory, &map[i]);
gst_memory_unref (map[i].memory);
}
GST_LOG_OBJECT (sink, "sent %" G_GSIZE_FORMAT " bytes to %d (of %d) clients",
size, num, no_clients);
return GST_FLOW_OK;
no_data:
{
return GST_FLOW_OK;
}
flushing:
{
GST_DEBUG ("we are flushing");
g_mutex_unlock (&sink->client_lock);
g_clear_error (&err);
/* unmap all memory */
for (i = 0; i < n_mem; i++) {
gst_memory_unmap (map[i].memory, &map[i]);
gst_memory_unref (map[i].memory);
}
return GST_FLOW_FLUSHING;
}
}
static GstFlowReturn
gst_multiudpsink_render (GstBaseSink * bsink, GstBuffer * buffer)
{
GstMultiUDPSink *sink;
GList *clients;
GOutputVector *vec;
GstMapInfo *map;
guint n_mem, i;
gsize size;
GstMemory *mem;
gint num, no_clients;
GError *err = NULL;
sink = GST_MULTIUDPSINK (bsink);
n_mem = gst_buffer_n_memory (buffer);
if (n_mem == 0)
goto no_data;
vec = g_new (GOutputVector, n_mem);
map = g_new (GstMapInfo, n_mem);
size = 0;
for (i = 0; i < n_mem; i++) {
mem = gst_buffer_get_memory (buffer, i);
gst_memory_map (mem, &map[i], GST_MAP_READ);
if (map[i].size > UDP_MAX_SIZE) {
GST_WARNING ("Attempting to send a UDP packet larger than maximum "
"size (%" G_GSIZE_FORMAT " > %d)", map[i].size, UDP_MAX_SIZE);
}
vec[i].buffer = map[i].data;
vec[i].size = map[i].size;
size += map[i].size;
}
sink->bytes_to_serve += size;
/* grab lock while iterating and sending to clients, this should be
* fast as UDP never blocks */
g_mutex_lock (&sink->client_lock);
GST_LOG_OBJECT (bsink, "about to send %" G_GSIZE_FORMAT " bytes", size);
no_clients = 0;
num = 0;
for (clients = sink->clients; clients; clients = g_list_next (clients)) {
GstUDPClient *client;
gint count;
client = (GstUDPClient *) clients->data;
no_clients++;
GST_LOG_OBJECT (sink, "sending %" G_GSIZE_FORMAT " bytes to client %p",
size, client);
count = sink->send_duplicates ? client->refcount : 1;
while (count--) {
gssize ret;
ret =
g_socket_send_message (sink->used_socket, client->addr, vec, n_mem,
NULL, 0, 0, sink->cancellable, &err);
if (ret < 0)
goto send_error;
num++;
client->bytes_sent += ret;
client->packets_sent++;
sink->bytes_served += ret;
}
}
g_mutex_unlock (&sink->client_lock);
/* unmap all memory again */
for (i = 0; i < n_mem; i++) {
gst_memory_unmap (map[i].memory, &map[i]);
gst_memory_unref (map[i].memory);
}
g_free (vec);
g_free (map);
GST_LOG_OBJECT (sink, "sent %" G_GSIZE_FORMAT " bytes to %d (of %d) clients",
size, num, no_clients);
return GST_FLOW_OK;
no_data:
{
return GST_FLOW_OK;
}
send_error:
{
g_mutex_unlock (&sink->client_lock);
GST_DEBUG ("got send error %s", err->message);
g_clear_error (&err);
return GST_FLOW_ERROR;
}
}