79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*
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* vrrp_timer.h - functions manipulating VRRP timers
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*
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* These functions use clock_gettime() and CLOCK_MONOTONIC_RAW
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* which use a raw hardware-based time that is not subject to
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* NTP adjustements.
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*
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* Copyright (C) 2014 Arnaud Andre
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*
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* This file is part of uvrrpd.
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*
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* uvrrpd is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* uvrrpd is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with uvrrpd. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _VRRP_TIMER_H_
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#define _VRRP_TIMER_H_
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#include <sys/time.h>
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/**
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* struct vrrp_timer
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*
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* @ts timestamp in ns
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* @delta time since the last update
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*/
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struct vrrp_timer {
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struct timespec ts;
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struct timespec delta;
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};
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/* prototype functions */
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int vrrp_timer_set(struct vrrp_timer *timer, time_t delay, long delay_cs);
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void vrrp_timer_clear(struct vrrp_timer *timer);
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int vrrp_timer_is_running(struct vrrp_timer *timer);
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int vrrp_timer_update(struct vrrp_timer *timer);
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int vrrp_timer_is_expired(struct vrrp_timer *timer);
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/* Specific VRRP timer macros */
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#define SKEW_TIME( v ) \
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( (256 - v->priority) * \
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(v->version==3?v->master_adv_int:1) / 256 )
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#define MASTERDOWN_INT( v ) \
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(3 * v->master_adv_int + SKEW_TIME( v ))
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#define VRRP_SET_ADV_TIMER( v ) \
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vrrp_timer_set(&v->adv_timer, \
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(v->version == 3 ? 0:v->adv_int), \
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(v->version == 3 ? v->master_adv_int:0))
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#define VRRP_SET_MASTERDOWN_TIMER( v ) \
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vrrp_timer_set(&v->masterdown_timer, \
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(v->version == 3 ? 0:MASTERDOWN_INT( v )), \
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(v->version == 3 ? MASTERDOWN_INT( v ):0))
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#define VRRP_SET_SKEW_TIME( v ) \
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vrrp_timer_set(&v->masterdown_timer, \
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(v->version == 3 ? 0:SKEW_TIME( v )), \
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(v->version == 3 ? SKEW_TIME( v ):0))
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#define VRRP_SET_STARTDELAY_TIMER( v ) \
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vrrp_timer_set(&v->masterdown_timer, \
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(v->version == 3 ? 0:v->start_delay), \
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(v->version == 3 ? v->start_delay:0))
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#endif /* _VRRP_TIMER_H_ */
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