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authorMartin Sustrik <sustrik@250bpm.com>2012-06-13 10:29:33 +0200
committerMartin Sustrik <sustrik@250bpm.com>2012-06-13 10:29:33 +0200
commitdb99547e5ac10c303a175f15733036183ab8af09 (patch)
treef015fdfe0dab59f0f4f773a7308e2d970ea69907 /src/udp_sender.cpp
parent7ef7f4a85a8e130c2910b6be8dc66fcde6c5a74d (diff)
Revert "UDP support"
This reverts commit 9ba8f9a503d69b891fae38628e0038f49ed5b8a4.
Diffstat (limited to 'src/udp_sender.cpp')
-rw-r--r--src/udp_sender.cpp197
1 files changed, 0 insertions, 197 deletions
diff --git a/src/udp_sender.cpp b/src/udp_sender.cpp
deleted file mode 100644
index ddcffbb..0000000
--- a/src/udp_sender.cpp
+++ /dev/null
@@ -1,197 +0,0 @@
-/*
- Copyright (c) 2012 Martin Lucina <martin@lucina.net>
-
- This file is part of Crossroads I/O.
-
- Crossroads I/O is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 3 of the License, or (at your
- option) any later version.
-
- Crossroads I/O 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 Lesser General Public
- License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "platform.hpp"
-
-#include <stdlib.h>
-
-#include "io_thread.hpp"
-#include "udp_sender.hpp"
-#include "session_base.hpp"
-#include "err.hpp"
-#include "wire.hpp"
-#include "stdint.hpp"
-#include "ip.hpp"
-
-xs::udp_sender_t::udp_sender_t (io_thread_t *parent_,
- const options_t &options_) :
- io_object_t (parent_),
- options (options_),
- encoder (0),
- seq_no (1),
- backoff_timer (NULL)
-{
-}
-
-xs::udp_sender_t::~udp_sender_t ()
-{
- if (backoff_timer) {
- rm_timer (backoff_timer);
- }
-}
-
-int xs::udp_sender_t::init (const char *address_)
-{
- int rc;
-
- rc = address_resolve_tcp (&address, address_, false, options.ipv4only);
- if (rc != 0)
- return rc;
-
- // Create a connected UDP socket for a single peer, and make
- // it non-blocking.
- socket = open_socket (address.ss_family, SOCK_DGRAM, IPPROTO_UDP);
- if (socket == -1)
- return -1;
- rc = ::connect (socket, (const sockaddr *)&address,
- address_size (&address));
- if (rc != 0)
- return -1;
- unblock_socket (socket);
-
- return 0;
-}
-
-void xs::udp_sender_t::plug (io_thread_t *io_thread_, session_base_t *session_)
-{
- session = session_;
- encoder.set_session (session);
-
- // Start polling.
- socket_handle = add_fd (socket);
- set_pollout (socket_handle);
-
- // UDP cannot pass subscriptions upstream; for now just fake subscribing
- // to all messages.
- msg_t msg;
- msg.init_size (1);
- *(unsigned char*) msg.data () = 1;
- int rc = session_->write (&msg);
- errno_assert (rc == 0);
- session_->flush ();
-}
-
-void xs::udp_sender_t::unplug ()
-{
- rm_fd (socket_handle);
-
- session = NULL;
-}
-
-void xs::udp_sender_t::terminate ()
-{
- unplug ();
- delete this;
-}
-
-// Called when our pipe is reactivated (has more data for us).
-void xs::udp_sender_t::activate_out ()
-{
- // Reactivate polling.
- set_pollout (socket_handle);
- // Try and send more data.
- out_event (retired_fd);
-}
-
-void xs::udp_sender_t::activate_in ()
-{
- xs_assert (false);
-}
-
-// Called when POLLERR is fired on the socket.
-void xs::udp_sender_t::in_event (fd_t fd_)
-{
- // Get the actual error code from the socket.
- int err = 0;
- socklen_t len = sizeof (err);
- int rc = getsockopt (socket, SOL_SOCKET, SO_ERROR, (char *) &err, &len);
- errno_assert (rc == 0);
-
- // If we got ECONNREFUSED, there is no one on the other end.
- // Stop sending for XS_RECONNECT_IVL milliseconds.
- if (err == ECONNREFUSED) {
- backoff_timer = add_timer (options.reconnect_ivl);
- // Polling will be re-started by timer_event ().
- reset_pollout (socket_handle);
- return;
- }
-
- // Any other error is a bug, for now.
- errno = err;
- errno_assert (false);
-}
-
-// Called when POLLOUT is fired on the socket.
-void xs::udp_sender_t::out_event (fd_t fd_)
-{
- unsigned char *data_p = data;
- size_t size = pgm_max_tpdu - udp_header_size;
- int offset = 0;
-
- // Get one packet of data from the encoder.
- encoder.get_data (&data_p, &size, &offset);
- // If there is no data in the pipe
- if (size == 0) {
- // Stop polling, we will be re-started by activate_out ().
- reset_pollout (socket_handle);
- return;
- }
- assert ((size + udp_header_size) <= pgm_max_tpdu);
-
- // Prepare UDP header (seqno, offset).
- unsigned char udp_header [udp_header_size];
- put_uint32 (udp_header, seq_no);
- put_uint16 (udp_header + 4, (uint16_t) offset);
-
- // Send out the message, ensuring the whole message was sent.
- struct iovec iov[2] = {
- { udp_header, udp_header_size },
- { data_p, size }
- };
- ssize_t write_bytes = writev (socket, iov, 2);
-
- // If we got ECONNREFUSED, there is no one on the other end.
- // Drop the packet and back off for XS_RECONNECT_IVL milliseconds.
- if (write_bytes == -1 && errno == ECONNREFUSED) {
- backoff_timer = add_timer (options.reconnect_ivl);
- // Polling will be re-started by timer_event ().
- reset_pollout (socket_handle);
- // Increase sequence number to ensure other end is notified of
- // dropped packet.
- ++seq_no;
- return;
- }
- errno_assert (write_bytes > 0);
- assert ((size_t)write_bytes == (udp_header_size + size));
-
- // Packet was sent successfully, increase sequence number.
- ++seq_no;
-}
-
-// Called when our backoff timer expires.
-void xs::udp_sender_t::timer_event (handle_t handle_)
-{
- xs_assert (handle_ == backoff_timer);
- backoff_timer = NULL;
-
- // Re-start polling.
- set_pollout (socket_handle);
-
- out_event (retired_fd);
-}