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/*
* Copyright (C) 2011 Martin Willi
* Copyright (C) 2011 revosec AG
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#include "certexpire_cron.h"
#include <time.h>
#include <utils/debug.h>
#include <processing/jobs/callback_job.h>
typedef struct private_certexpire_cron_t private_certexpire_cron_t;
/**
* Private data of an certexpire_cron_t object.
*/
struct private_certexpire_cron_t {
/**
* Public certexpire_cron_t interface.
*/
certexpire_cron_t public;
/**
* time when to run export job
*/
struct {
bool m[60];
bool h[24];
bool d[32];
bool my[13];
bool dw[8];
} cron;
/**
* Callback function to execute
*/
certexpire_cron_job_t job;
/**
* Data to pass to callback
*/
void *data;
};
/**
* Check if we should execute the export job
*/
static job_requeue_t check_cron(private_certexpire_cron_t *this)
{
struct tm tm;
time_t t;
t = time(NULL);
localtime_r(&t, &tm);
/* recheck every minute at second 0 */
lib->scheduler->schedule_job(lib->scheduler,
(job_t*)callback_job_create_with_prio((callback_job_cb_t)check_cron,
this, NULL, NULL, JOB_PRIO_CRITICAL), 60 - tm.tm_sec);
/* skip this minute if we had a large negative time shift */
if (tm.tm_sec <= 30)
{
if (this->cron.m[tm.tm_min] &&
this->cron.h[tm.tm_hour] &&
this->cron.d[tm.tm_mday] &&
this->cron.my[tm.tm_mon + 1] &&
(this->cron.dw[tm.tm_wday] ||
(this->cron.dw[7] && tm.tm_wday == 0)))
{
this->job(this->data);
}
}
return JOB_REQUEUE_NONE;
}
/**
* Parse a cron range component into boolean fields
*/
static void parse_ranges(bool *fields, char *label, int mi, int ma, char *range)
{
enumerator_t *enumerator;
int from, to, i;
if (streq(range, "*"))
{
for (i = mi; i <= ma; i++)
{
fields[i] = TRUE;
}
}
else
{
enumerator = enumerator_create_token(range, ",", "");
while (enumerator->enumerate(enumerator, &range))
{
switch (sscanf(range, "%d-%d", &from, &to))
{
case 1: /* single value */
if (from >= mi && from <= ma)
{
fields[from] = TRUE;
}
else
{
DBG1(DBG_CFG, "ignoring cron %s %d, out of range",
label, from);
}
break;
case 2: /* range */
if (from < mi)
{
DBG1(DBG_CFG, "cron %s out of range, shortening start "
"from %d to %d", label, from, mi);
from = mi;
}
if (to > ma)
{
DBG1(DBG_CFG, "cron %s out of range, shortening end "
"from %d to %d", label, to, ma);
to = ma;
}
for (i = from; i <= to; i++)
{
fields[i] = TRUE;
}
break;
default:
break;
}
}
enumerator->destroy(enumerator);
}
DBG3(DBG_CFG, "cron job with enabled %ss:", label);
for (i = mi; i <= ma; i++)
{
if (fields[i])
{
DBG3(DBG_CFG, " %d", i);
}
}
}
/**
* Start cron processing, if configured
*/
static void start_cron(private_certexpire_cron_t *this, char *cron)
{
enumerator_t *enumerator;
int i = 0;
enumerator = enumerator_create_token(cron, " ", " ");
for (i = 0; i < 5; i++)
{
if (!enumerator->enumerate(enumerator, &cron))
{
DBG1(DBG_CFG, "cron misses a field, using '*'");
cron = "*";
}
switch (i)
{
case 0:
parse_ranges(this->cron.m, "minute", 0, 59, cron);
break;
case 1:
parse_ranges(this->cron.h, "hour", 0, 23, cron);
break;
case 2:
parse_ranges(this->cron.d, "day", 1, 31, cron);
break;
case 3:
parse_ranges(this->cron.my, "month", 1, 12, cron);
break;
case 4:
parse_ranges(this->cron.dw, "weekday", 0, 7, cron);
break;
default:
break;
}
}
if (enumerator->enumerate(enumerator, &cron))
{
DBG1(DBG_CFG, "ignoring extra fields in cron");
}
enumerator->destroy(enumerator);
check_cron(this);
}
METHOD(certexpire_cron_t, destroy, void,
private_certexpire_cron_t *this)
{
free(this);
}
/**
* See header
*/
certexpire_cron_t *certexpire_cron_create(char *cron, certexpire_cron_job_t job,
void *data)
{
private_certexpire_cron_t *this;
INIT(this,
.public = {
.destroy = _destroy,
},
.job = job,
.data = data,
);
start_cron(this, cron);
return &this->public;
}
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