/*
* Soft: Keepalived is a failover program for the LVS project
* <www.linuxvirtualserver.org>. It monitor & manipulate
* a loadbalanced server pool using multi-layer checks.
*
* Part: layer4.c include file.
*
* Author: Alexandre Cassen, <acassen@linux-vs.org>
*
* This program 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 General Public License for more details.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Copyright (C) 2001-2017 Alexandre Cassen, <acassen@gmail.com>
*/
#ifndef _LAYER4_H
#define _LAYER4_H
/* system includes */
#include <sys/socket.h>
#include <net/if.h>
#include <stdbool.h>
/* local includes */
#include "scheduler.h"
enum connect_result {
connect_error,
connect_in_progress,
connect_timeout,
connect_success
};
/* connection options structure definition */
typedef struct _conn_opts {
struct sockaddr_storage dst;
struct sockaddr_storage bindto;
char bind_if[IFNAMSIZ];
unsigned int connection_to; /* connection time-out */
#ifdef _WITH_SO_MARK_
unsigned int fwmark; /* to mark packets going out of the socket using SO_MARK */
#endif
} conn_opts_t;
/* Prototypes defs */
#ifdef _WITH_LVS_
extern enum connect_result
socket_bind_connect(int, conn_opts_t *);
#endif
extern enum connect_result
socket_connect(int, struct sockaddr_storage *);
extern enum connect_result
socket_state(thread_t *, int (*func) (thread_t *));
#ifdef _WITH_LVS_
extern bool
socket_connection_state(int, enum connect_result
, thread_t *, int (*func) (thread_t *)
, unsigned long);
#endif
/* Backward compatibility */
#ifdef _WITH_LVS_
static inline enum connect_result
tcp_bind_connect(int fd, conn_opts_t *co)
{
return socket_bind_connect(fd, co);
}
#endif
static inline enum connect_result
tcp_connect(int fd, struct sockaddr_storage *addr)
{
return socket_connect(fd, addr);
}
static inline enum connect_result
tcp_socket_state(thread_t * thread, int (*func) (thread_t *))
{
return socket_state(thread, func);
}
#ifdef _WITH_LVS_
static inline bool
tcp_connection_state(int fd, enum connect_result status, thread_t * thread,
int (*func) (thread_t *), unsigned long timeout)
{
return socket_connection_state(fd, status, thread, func, timeout);
}
#endif
#endif