/**
* This function is called once we either timeout
* or have data ready to read.
*
* @param cls connection to read from
* @param tc scheduler context
*/
static void
receive_ready (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_CONNECTION_Handle *connection = cls;
char buffer[connection->max];
ssize_t ret;
GNUNET_CONNECTION_Receiver receiver;
connection->read_task = GNUNET_SCHEDULER_NO_TASK;
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
/* ignore shutdown request, go again immediately */
connection->read_task =
GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_absolute_get_remaining
(connection->receive_timeout), connection->sock,
&receive_ready, connection);
return;
}
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_TIMEOUT))
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Receive from `%s' encounters error: timeout (%p)\n",
GNUNET_a2s (connection->addr, connection->addrlen),
GNUNET_TIME_absolute_get_duration (connection->receive_timeout).rel_value,
connection);
signal_receive_timeout (connection);
return;
}
if (NULL == connection->sock)
{
/* connect failed for good */
signal_receive_error (connection, ECONNREFUSED);
return;
}
GNUNET_assert (GNUNET_NETWORK_fdset_isset (tc->read_ready, connection->sock));
RETRY:
ret = GNUNET_NETWORK_socket_recv (connection->sock, buffer, connection->max);
if (-1 == ret)
{
if (EINTR == errno)
goto RETRY;
signal_receive_error (connection, errno);
return;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"receive_ready read %u/%u bytes from `%s' (%p)!\n", (unsigned int) ret,
connection->max, GNUNET_a2s (connection->addr, connection->addrlen), connection);
GNUNET_assert (NULL != (receiver = connection->receiver));
connection->receiver = NULL;
receiver (connection->receiver_cls, buffer, ret, connection->addr, connection->addrlen, 0);
}
/**
* We've failed for good to establish a connection (timeout or
* no more addresses to try).
*
* @param connection the connection we tried to establish
*/
static void
connect_fail_continuation (struct GNUNET_CONNECTION_Handle *connection)
{
LOG (GNUNET_ERROR_TYPE_INFO,
_("Failed to establish TCP connection to `%s:%u', no further addresses to try.\n"),
connection->hostname, connection->port);
GNUNET_break (NULL == connection->ap_head);
GNUNET_break (NULL == connection->ap_tail);
GNUNET_break (GNUNET_NO == connection->dns_active);
GNUNET_break (NULL == connection->sock);
GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == connection->write_task);
/* signal errors for jobs that used to wait on the connection */
connection->destroy_later = 1;
if (NULL != connection->receiver)
signal_receive_error (connection, ECONNREFUSED);
if (NULL != connection->nth.notify_ready)
{
GNUNET_assert (connection->nth.timeout_task != GNUNET_SCHEDULER_NO_TASK);
GNUNET_SCHEDULER_cancel (connection->nth.timeout_task);
connection->nth.timeout_task = GNUNET_SCHEDULER_NO_TASK;
signal_transmit_error (connection, ECONNREFUSED);
}
if (-1 == connection->destroy_later)
{
/* do it now */
connection->destroy_later = 0;
GNUNET_CONNECTION_destroy (connection);
return;
}
connection->destroy_later = 0;
}
