2001-01-21 15:25:46 +00:00
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/* $FreeBSD$ */
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2003-08-08 16:56:01 +00:00
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/* $KAME: timer.c,v 1.9 2002/06/10 19:59:47 itojun Exp $ */
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2000-07-05 22:09:50 +00:00
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2000-01-06 12:40:54 +00:00
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/*
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* Copyright (C) 1998 WIDE Project.
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2011-07-17 19:24:54 +00:00
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* Copyright (C) 2011 Hiroki Sato <hrs@FreeBSD.org>
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2000-01-06 12:40:54 +00:00
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* All rights reserved.
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2011-06-06 03:06:43 +00:00
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*
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2000-01-06 12:40:54 +00:00
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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2011-06-06 03:06:43 +00:00
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*
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2000-01-06 12:40:54 +00:00
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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2011-06-06 03:06:43 +00:00
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#include <sys/queue.h>
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2011-07-17 19:24:54 +00:00
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <netinet/in.h>
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2000-01-06 12:40:54 +00:00
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#include <unistd.h>
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#include <syslog.h>
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#include <stdlib.h>
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#include <string.h>
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2004-10-22 07:31:12 +00:00
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#include <search.h>
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2013-08-05 20:13:02 +00:00
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#include <time.h>
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2011-07-17 19:24:54 +00:00
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#include <netdb.h>
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2000-01-06 12:40:54 +00:00
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2011-07-17 19:24:54 +00:00
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#include "rtadvd.h"
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#include "timer_subr.h"
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#include "timer.h"
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2000-01-06 12:40:54 +00:00
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2011-06-06 03:06:43 +00:00
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struct rtadvd_timer_head_t ra_timer =
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TAILQ_HEAD_INITIALIZER(ra_timer);
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2013-08-05 20:13:02 +00:00
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static struct timespec tm_limit;
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static struct timespec tm_max;
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2000-01-06 12:40:54 +00:00
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void
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2011-06-06 03:06:43 +00:00
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rtadvd_timer_init(void)
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2000-01-06 12:40:54 +00:00
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{
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2013-08-05 20:13:02 +00:00
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/* Generate maximum time in timespec. */
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memset(&tm_limit.tv_sec, 0xff, sizeof(tm_limit.tv_sec));
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memset(&tm_limit.tv_nsec, 0xff, sizeof(tm_limit.tv_nsec));
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tm_limit.tv_sec &= ~(1UL << (sizeof(tm_limit.tv_sec) * 8 - 1));
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tm_limit.tv_nsec &= ~(1UL << (sizeof(tm_limit.tv_nsec) * 8 - 1));
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2000-01-06 12:40:54 +00:00
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2011-06-06 03:06:43 +00:00
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tm_max = tm_limit;
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TAILQ_INIT(&ra_timer);
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2000-01-06 12:40:54 +00:00
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}
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2011-07-17 19:24:54 +00:00
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void
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rtadvd_update_timeout_handler(void)
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{
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struct ifinfo *ifi;
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TAILQ_FOREACH(ifi, &ifilist, ifi_next) {
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switch (ifi->ifi_state) {
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case IFI_STATE_CONFIGURED:
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case IFI_STATE_TRANSITIVE:
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if (ifi->ifi_ra_timer != NULL)
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continue;
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syslog(LOG_DEBUG, "<%s> add timer for %s (idx=%d)",
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__func__, ifi->ifi_ifname, ifi->ifi_ifindex);
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ifi->ifi_ra_timer = rtadvd_add_timer(ra_timeout,
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ra_timer_update, ifi, ifi);
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ra_timer_update((void *)ifi,
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&ifi->ifi_ra_timer->rat_tm);
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rtadvd_set_timer(&ifi->ifi_ra_timer->rat_tm,
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ifi->ifi_ra_timer);
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break;
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case IFI_STATE_UNCONFIGURED:
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if (ifi->ifi_ra_timer == NULL)
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continue;
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syslog(LOG_DEBUG,
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"<%s> remove timer for %s (idx=%d)", __func__,
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ifi->ifi_ifname, ifi->ifi_ifindex);
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rtadvd_remove_timer(ifi->ifi_ra_timer);
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ifi->ifi_ra_timer = NULL;
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break;
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}
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}
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return;
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}
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2000-01-06 12:40:54 +00:00
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struct rtadvd_timer *
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2007-11-07 10:53:41 +00:00
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rtadvd_add_timer(struct rtadvd_timer *(*timeout)(void *),
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2013-08-05 20:13:02 +00:00
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void (*update)(void *, struct timespec *),
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2002-06-13 16:59:31 +00:00
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void *timeodata, void *updatedata)
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2000-01-06 12:40:54 +00:00
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{
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2011-06-06 03:06:43 +00:00
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struct rtadvd_timer *rat;
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2000-01-06 12:40:54 +00:00
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2011-06-06 03:06:43 +00:00
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if (timeout == NULL) {
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2000-01-06 12:40:54 +00:00
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syslog(LOG_ERR,
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2011-06-06 03:06:43 +00:00
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"<%s> timeout function unspecified", __func__);
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2000-01-06 12:40:54 +00:00
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exit(1);
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}
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2011-06-06 03:06:43 +00:00
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rat = malloc(sizeof(*rat));
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if (rat == NULL) {
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2000-01-06 12:40:54 +00:00
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syslog(LOG_ERR,
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2011-06-06 03:06:43 +00:00
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"<%s> can't allocate memory", __func__);
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2000-01-06 12:40:54 +00:00
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exit(1);
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}
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2011-06-06 03:06:43 +00:00
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memset(rat, 0, sizeof(*rat));
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rat->rat_expire = timeout;
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rat->rat_update = update;
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rat->rat_expire_data = timeodata;
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rat->rat_update_data = updatedata;
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rat->rat_tm = tm_max;
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2000-01-06 12:40:54 +00:00
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/* link into chain */
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2011-06-06 03:06:43 +00:00
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TAILQ_INSERT_TAIL(&ra_timer, rat, rat_next);
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2000-01-06 12:40:54 +00:00
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2011-06-06 03:06:43 +00:00
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return (rat);
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2000-01-06 12:40:54 +00:00
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}
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2000-07-05 22:09:50 +00:00
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void
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2011-06-06 03:06:43 +00:00
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rtadvd_remove_timer(struct rtadvd_timer *rat)
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2000-07-05 22:09:50 +00:00
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{
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2011-06-06 03:06:43 +00:00
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if (rat == NULL)
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return;
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TAILQ_REMOVE(&ra_timer, rat, rat_next);
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free(rat);
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2000-07-05 22:09:50 +00:00
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}
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2000-01-06 12:40:54 +00:00
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/*
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2002-06-13 16:59:31 +00:00
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* Check expiration for each timer. If a timer expires,
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2000-01-06 12:40:54 +00:00
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* call the expire function for the timer and update the timer.
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* Return the next interval for select() call.
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*/
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2013-08-05 20:13:02 +00:00
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struct timespec *
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2011-06-06 03:06:43 +00:00
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rtadvd_check_timer(void)
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2000-01-06 12:40:54 +00:00
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{
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2013-08-05 20:13:02 +00:00
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static struct timespec returnval;
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struct timespec now;
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2011-06-06 03:06:43 +00:00
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struct rtadvd_timer *rat;
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2000-01-06 12:40:54 +00:00
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2013-08-05 20:13:02 +00:00
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clock_gettime(CLOCK_MONOTONIC_FAST, &now);
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2011-06-06 03:06:43 +00:00
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tm_max = tm_limit;
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TAILQ_FOREACH(rat, &ra_timer, rat_next) {
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2013-08-05 20:13:02 +00:00
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if (TS_CMP(&rat->rat_tm, &now, <=)) {
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2011-06-06 03:06:43 +00:00
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if (((*rat->rat_expire)(rat->rat_expire_data) == NULL))
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2002-06-13 16:59:31 +00:00
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continue; /* the timer was removed */
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2011-06-06 03:06:43 +00:00
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if (rat->rat_update)
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(*rat->rat_update)(rat->rat_update_data, &rat->rat_tm);
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2013-08-05 20:13:02 +00:00
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TS_ADD(&rat->rat_tm, &now, &rat->rat_tm);
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2000-01-06 12:40:54 +00:00
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}
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2013-08-05 20:13:02 +00:00
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if (TS_CMP(&rat->rat_tm, &tm_max, <))
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2011-06-06 03:06:43 +00:00
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tm_max = rat->rat_tm;
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2000-01-06 12:40:54 +00:00
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}
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2013-08-05 20:13:02 +00:00
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if (TS_CMP(&tm_max, &tm_limit, ==)) {
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2000-07-05 22:09:50 +00:00
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/* no need to timeout */
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2011-06-06 03:06:43 +00:00
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return (NULL);
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2013-08-05 20:13:02 +00:00
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} else if (TS_CMP(&tm_max, &now, <)) {
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2000-01-06 12:40:54 +00:00
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/* this may occur when the interval is too small */
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2013-08-05 20:13:02 +00:00
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returnval.tv_sec = returnval.tv_nsec = 0;
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2003-08-08 16:56:01 +00:00
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} else
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2013-08-05 20:13:02 +00:00
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TS_SUB(&tm_max, &now, &returnval);
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2011-06-06 03:06:43 +00:00
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return (&returnval);
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2000-01-06 12:40:54 +00:00
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}
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void
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2013-08-05 20:13:02 +00:00
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rtadvd_set_timer(struct timespec *tm, struct rtadvd_timer *rat)
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2000-01-06 12:40:54 +00:00
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{
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2013-08-05 20:13:02 +00:00
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struct timespec now;
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2000-01-06 12:40:54 +00:00
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2011-07-17 19:24:54 +00:00
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/* reset the timer */
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2013-08-05 20:13:02 +00:00
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clock_gettime(CLOCK_MONOTONIC_FAST, &now);
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TS_ADD(&now, tm, &rat->rat_tm);
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2000-01-06 12:40:54 +00:00
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2011-07-17 19:24:54 +00:00
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/* update the next expiration time */
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2013-08-05 20:13:02 +00:00
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if (TS_CMP(&rat->rat_tm, &tm_max, <))
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2011-07-17 19:24:54 +00:00
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tm_max = rat->rat_tm;
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2000-01-06 12:40:54 +00:00
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2011-07-17 19:24:54 +00:00
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return;
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2000-01-06 12:40:54 +00:00
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}
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