/*

 * 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