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/* $OpenBSD: timer.c,v 1.16 2015/01/16 06:40:15 deraadt Exp $ */
/*
* Copyright (c) 2003-2007 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdlib.h>
#include "bgpd.h"
#include "session.h"
#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
time_t
getmonotime(void)
{
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0)
fatal("clock_gettime");
return (ts.tv_sec);
}
struct peer_timer *
timer_get(struct peer *p, enum Timer timer)
{
struct peer_timer *pt;
TAILQ_FOREACH(pt, &p->timers, entry)
if (pt->type == timer)
break;
return (pt);
}
struct peer_timer *
timer_nextisdue(struct peer *p)
{
struct peer_timer *pt;
pt = TAILQ_FIRST(&p->timers);
if (pt != NULL && pt->val > 0 && pt->val <= getmonotime())
return (pt);
return (NULL);
}
time_t
timer_nextduein(struct peer *p)
{
struct peer_timer *pt;
if ((pt = TAILQ_FIRST(&p->timers)) != NULL && pt->val > 0)
return (MAXIMUM(pt->val - getmonotime(), 0));
return (-1);
}
int
timer_running(struct peer *p, enum Timer timer, time_t *left)
{
struct peer_timer *pt = timer_get(p, timer);
if (pt != NULL && pt->val > 0) {
if (left != NULL)
*left = pt->val - getmonotime();
return (1);
}
return (0);
}
void
timer_set(struct peer *p, enum Timer timer, u_int offset)
{
struct peer_timer *t, *pt = timer_get(p, timer);
if (pt == NULL) { /* have to create */
if ((pt = malloc(sizeof(*pt))) == NULL)
fatal("timer_set");
pt->type = timer;
} else {
if (pt->val == getmonotime() + (time_t)offset)
return;
TAILQ_REMOVE(&p->timers, pt, entry);
}
pt->val = getmonotime() + offset;
TAILQ_FOREACH(t, &p->timers, entry)
if (t->val == 0 || t->val > pt->val)
break;
if (t != NULL)
TAILQ_INSERT_BEFORE(t, pt, entry);
else
TAILQ_INSERT_TAIL(&p->timers, pt, entry);
}
void
timer_stop(struct peer *p, enum Timer timer)
{
struct peer_timer *pt = timer_get(p, timer);
if (pt != NULL) {
pt->val = 0;
TAILQ_REMOVE(&p->timers, pt, entry);
TAILQ_INSERT_TAIL(&p->timers, pt, entry);
}
}
void
timer_remove(struct peer *p, enum Timer timer)
{
struct peer_timer *pt = timer_get(p, timer);
if (pt != NULL) {
TAILQ_REMOVE(&p->timers, pt, entry);
free(pt);
}
}
void
timer_remove_all(struct peer *p)
{
struct peer_timer *pt;
while ((pt = TAILQ_FIRST(&p->timers)) != NULL) {
TAILQ_REMOVE(&p->timers, pt, entry);
free(pt);
}
}
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