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/*
* (C) 2006 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <sys/time.h>
#include "linux_list.h"
#include "conntrackd.h"
#include "alarm.h"
#include "jhash.h"
#include <time.h>
#include <errno.h>
static LIST_HEAD(alarm_list);
void init_alarm(struct alarm_list *t,
void *data,
void (*fcn)(struct alarm_list *a, void *data))
{
timerclear(&t->tv);
t->data = data;
t->function = fcn;
}
void __add_alarm(struct alarm_list *alarm)
{
struct alarm_list *t;
list_for_each_entry(t, &alarm_list, head) {
if (timercmp(&alarm->tv, &t->tv, <)) {
list_add_tail(&alarm->head, &t->head);
return;
}
}
list_add_tail(&alarm->head, &alarm_list);
}
void add_alarm(struct alarm_list *alarm)
{
struct timeval tv;
gettimeofday(&tv, NULL);
timeradd(&alarm->tv, &tv, &alarm->tv);
__add_alarm(alarm);
}
void del_alarm(struct alarm_list *alarm)
{
list_del(&alarm->head);
}
void mod_alarm(struct alarm_list *alarm, unsigned long sc, unsigned long usc)
{
struct timeval tv;
list_del(&alarm->head);
set_alarm_expiration(alarm, sc, usc);
gettimeofday(&tv, NULL);
timeradd(&alarm->tv, &tv, &alarm->tv);
__add_alarm(alarm);
}
int get_next_alarm(struct timeval *tv, struct timeval *next_alarm)
{
struct alarm_list *t;
list_for_each_entry(t, &alarm_list, head) {
timersub(&t->tv, tv, next_alarm);
return 1;
}
return 0;
}
int do_alarm_run(struct timeval *next_alarm)
{
struct alarm_list *t, *tmp;
struct timeval tv;
gettimeofday(&tv, NULL);
list_for_each_entry_safe(t, tmp, &alarm_list, head) {
if (timercmp(&t->tv, &tv, >)) {
timersub(&t->tv, &tv, next_alarm);
return 1;
}
del_alarm(t);
t->function(t, t->data);
}
/* check for refreshed alarms to get the next one */
return get_next_alarm(&tv, next_alarm);
}
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