/*

 * 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:        BFD event handling

 *

 * Author:      Ilya Voronin, <ivoronin@gmail.com>

 *

 *              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) 2015-2017 Alexandre Cassen, <acassen@gmail.com>

 */

#include "config.h"

#include <assert.h>

#include <unistd.h>

#include "bfd.h"

#include "bfd_event.h"

#include "bfd_daemon.h"

#include "logger.h"

#include "main.h"

#include "memory.h"

#include "bitops.h"

#include "utils.h"

#include "global_data.h"

void

bfd_event_send(bfd_t *bfd)

{

	bfd_event_t evt;

	int ret;

	assert(bfd);

	/* If there is no VRRP process running, don't write to the pipe */

	if (true

#ifdef _WITH_VRRP_

	    && !running_vrrp()

#endif

#ifdef _WITH_LVS_

	    && !running_checker()

#endif

		)

		return;

	memset(&evt, 0, sizeof evt);

	strcpy(evt.iname, bfd->iname);

	evt.state = bfd->local_state == BFD_STATE_UP ? BFD_STATE_UP : BFD_STATE_DOWN;

	evt.sent_time = timer_now();

#ifdef _WITH_VRRP_

	if (bfd->vrrp) {

		ret = write(bfd_vrrp_event_pipe[1], &evt, sizeof evt);

		if (ret == -1 && __test_bit(LOG_DETAIL_BIT, &debug))

			log_message(LOG_ERR, "BFD_Instance(%s) vrrp pipe write() error %m",

				    bfd->iname);

	}

#endif

#ifdef _WITH_LVS_

	if (bfd->checker) {

		ret = write(bfd_checker_event_pipe[1], &evt, sizeof evt);

		if (ret == -1 && __test_bit(LOG_DETAIL_BIT, &debug))

			log_message(LOG_ERR, "BFD_Instance(%s) checker pipe write() error %m",

				    bfd->iname);

	}

#endif

}