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/*
Copyright (c) 2007-2009 FastMQ Inc.
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ 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
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "zmq_connecter.hpp"
#include "zmq_connecter_init.hpp"
#include "io_thread.hpp"
#include "err.hpp"
zmq::zmq_connecter_t::zmq_connecter_t (io_thread_t *parent_,
socket_base_t *owner_, const options_t &options_,
const char *session_name_, bool wait_) :
owned_t (parent_, owner_),
io_object_t (parent_),
handle_valid (false),
wait (wait_),
options (options_),
session_name (session_name_)
{
}
zmq::zmq_connecter_t::~zmq_connecter_t ()
{
}
int zmq::zmq_connecter_t::set_address (const char *address_)
{
int rc = tcp_connecter.set_address (address_);
if (rc != 0)
return rc;
address = address_;
return 0;
}
void zmq::zmq_connecter_t::process_plug ()
{
if (wait)
add_timer ();
else
start_connecting ();
}
void zmq::zmq_connecter_t::process_unplug ()
{
if (wait)
cancel_timer ();
if (handle_valid)
rm_fd (handle);
}
void zmq::zmq_connecter_t::in_event ()
{
// We are not polling for incomming data, so we are actually called
// because of error here. However, we can get error on out event as well
// on some platforms, so we'll simply handle both events in the same way.
out_event ();
}
void zmq::zmq_connecter_t::out_event ()
{
fd_t fd = tcp_connecter.connect ();
rm_fd (handle);
handle_valid = false;
// Handle the error condition by attempt to reconnect.
if (fd == retired_fd) {
tcp_connecter.close ();
wait = true;
add_timer ();
return;
}
// Create an init object.
io_thread_t *io_thread = choose_io_thread (options.affinity);
zmq_connecter_init_t *init = new zmq_connecter_init_t (io_thread, owner,
fd, options, session_name.c_str (), address.c_str ());
zmq_assert (init);
send_plug (init);
send_own (owner, init);
// Ask owner socket to shut the connecter down.
term ();
}
void zmq::zmq_connecter_t::timer_event ()
{
wait = false;
start_connecting ();
}
void zmq::zmq_connecter_t::start_connecting ()
{
// Open the connecting socket.
int rc = tcp_connecter.open ();
// Connect may succeed in synchronous manner.
if (rc == 0) {
handle = add_fd (tcp_connecter.get_fd ());
handle_valid = true;
out_event ();
return;
}
// Connection establishment may be dealyed. Poll for its completion.
else if (rc == -1 && errno == EAGAIN) {
handle = add_fd (tcp_connecter.get_fd ());
handle_valid = true;
set_pollout (handle);
return;
}
// Handle any other error condition by eventual reconnect.
tcp_connecter.close ();
wait = true;
add_timer ();
}
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