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/*
Copyright (c) 2009-2012 250bpm s.r.o.
Copyright (c) 2007-2009 iMatix Corporation
Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
This file is part of Crossroads I/O project.
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 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/>.
*/
#ifndef __TCP_CONNECTER_HPP_INCLUDED__
#define __TCP_CONNECTER_HPP_INCLUDED__
#include "fd.hpp"
#include "own.hpp"
#include "stdint.hpp"
#include "io_object.hpp"
#include "address.hpp"
namespace xs
{
class io_thread_t;
class session_base_t;
class tcp_connecter_t : public own_t, public io_object_t
{
public:
// If 'delay' is true connecter first waits for a while, then starts
// connection process.
tcp_connecter_t (xs::io_thread_t *io_thread_,
xs::session_base_t *session_, const options_t &options_,
bool delay_);
~tcp_connecter_t ();
// Set address to connect to.
int set_address (const char *addr_);
private:
// Handlers for incoming commands.
void process_plug ();
// Handlers for I/O events.
void in_event (fd_t fd_);
void out_event (fd_t fd_);
void timer_event (handle_t handle_);
// Internal function to start the actual connection establishment.
void start_connecting ();
// Internal function to add a reconnect timer
void add_reconnect_timer();
// Internal function to return a reconnect backoff delay.
// Will modify the current_reconnect_ivl used for next call
// Returns the currently used interval
int get_new_reconnect_ivl ();
// Open TCP connecting socket. Returns -1 in case of error,
// 0 if connect was successfull immediately. Returns -1 with
// EAGAIN errno if async connect was launched.
int open ();
// Close the connecting socket.
void close ();
// Get the file descriptor of newly created connection. Returns
// retired_fd if the connection was unsuccessfull.
fd_t connect ();
// Address to connect to.
address_t address;
// Source address.
address_t source_address;
// Underlying socket.
fd_t s;
// Handle corresponding to the listening socket or NULL if the socket
// is not registered with the I/O thread.
handle_t handle;
// If true, connecter is waiting a while before trying to connect.
bool wait;
// Reference to the session we belong to.
xs::session_base_t *session;
// Current reconnect ivl, updated for backoff strategy
int current_reconnect_ivl;
// Handle to reconnect timer, if active, NULL otherwise.
handle_t reconnect_timer;
tcp_connecter_t (const tcp_connecter_t&);
const tcp_connecter_t &operator = (const tcp_connecter_t&);
};
}
#endif
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