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pkg-monitoring-plugins/plugins/check_time.c

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/*****************************************************************************
*
* Monitoring check_time plugin
*
* License: GPL
* Copyright (c) 1999-2007 Monitoring Plugins Development Team
*
* Description:
*
* This file contains the check_time plugin
*
* This plugin will check the time difference with the specified host.
*
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*
*****************************************************************************/
const char *progname = "check_time";
const char *copyright = "1999-2007";
const char *email = "devel@monitoring-plugins.org";
#include "common.h"
#include "netutils.h"
#include "utils.h"
enum {
TIME_PORT = 37
};
#define UNIX_EPOCH 2208988800UL
uint32_t raw_server_time;
unsigned long server_time, diff_time;
int warning_time = 0;
bool check_warning_time = false;
int critical_time = 0;
bool check_critical_time = false;
unsigned long warning_diff = 0;
bool check_warning_diff = false;
unsigned long critical_diff = 0;
bool check_critical_diff = false;
int server_port = TIME_PORT;
char *server_address = NULL;
bool use_udp = false;
int process_arguments (int, char **);
void print_help (void);
void print_usage (void);
int
main (int argc, char **argv)
{
int sd;
int result = STATE_UNKNOWN;
time_t conntime;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
/* initialize alarm signal handling */
signal (SIGALRM, socket_timeout_alarm_handler);
/* set socket timeout */
alarm (socket_timeout);
time (&start_time);
/* try to connect to the host at the given port number */
if (use_udp) {
result = my_udp_connect (server_address, server_port, &sd);
} else {
result = my_tcp_connect (server_address, server_port, &sd);
}
if (result != STATE_OK) {
if (check_critical_time)
result = STATE_CRITICAL;
else if (check_warning_time)
result = STATE_WARNING;
else
result = STATE_UNKNOWN;
die (result,
_("TIME UNKNOWN - could not connect to server %s, port %d\n"),
server_address, server_port);
}
if (use_udp) {
if (send (sd, "", 0, 0) < 0) {
if (check_critical_time)
result = STATE_CRITICAL;
else if (check_warning_time)
result = STATE_WARNING;
else
result = STATE_UNKNOWN;
die (result,
_("TIME UNKNOWN - could not send UDP request to server %s, port %d\n"),
server_address, server_port);
}
}
/* watch for the connection string */
result = recv (sd, (void *)&raw_server_time, sizeof (raw_server_time), 0);
/* close the connection */
close (sd);
/* reset the alarm */
time (&end_time);
alarm (0);
/* return a WARNING status if we couldn't read any data */
if (result <= 0) {
if (check_critical_time)
result = STATE_CRITICAL;
else if (check_warning_time)
result = STATE_WARNING;
else
result = STATE_UNKNOWN;
die (result,
_("TIME UNKNOWN - no data received from server %s, port %d\n"),
server_address, server_port);
}
result = STATE_OK;
conntime = (end_time - start_time);
if (check_critical_time&& conntime > critical_time)
result = STATE_CRITICAL;
else if (check_warning_time && conntime > warning_time)
result = STATE_WARNING;
if (result != STATE_OK)
die (result, _("TIME %s - %d second response time|%s\n"),
state_text (result), (int)conntime,
perfdata ("time", (long)conntime, "s",
check_warning_time, (long)warning_time,
check_critical_time, (long)critical_time,
true, 0, false, 0));
server_time = ntohl (raw_server_time) - UNIX_EPOCH;
if (server_time > (unsigned long)end_time)
diff_time = server_time - (unsigned long)end_time;
else
diff_time = (unsigned long)end_time - server_time;
if (check_critical_diff&& diff_time > critical_diff)
result = STATE_CRITICAL;
else if (check_warning_diff&& diff_time > warning_diff)
result = STATE_WARNING;
printf (_("TIME %s - %lu second time difference|%s %s\n"),
state_text (result), diff_time,
perfdata ("time", (long)conntime, "s",
check_warning_time, (long)warning_time,
check_critical_time, (long)critical_time,
true, 0, false, 0),
perfdata ("offset", diff_time, "s",
check_warning_diff, warning_diff,
check_critical_diff, critical_diff,
true, 0, false, 0));
return result;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
int option = 0;
static struct option longopts[] = {
{"hostname", required_argument, 0, 'H'},
{"warning-variance", required_argument, 0, 'w'},
{"critical-variance", required_argument, 0, 'c'},
{"warning-connect", required_argument, 0, 'W'},
{"critical-connect", required_argument, 0, 'C'},
{"port", required_argument, 0, 'p'},
{"udp", no_argument, 0, 'u'},
{"timeout", required_argument, 0, 't'},
{"version", no_argument, 0, 'V'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
if (argc < 2)
usage ("\n");
for (c = 1; c < argc; c++) {
if (strcmp ("-to", argv[c]) == 0)
strcpy (argv[c], "-t");
else if (strcmp ("-wd", argv[c]) == 0)
strcpy (argv[c], "-w");
else if (strcmp ("-cd", argv[c]) == 0)
strcpy (argv[c], "-c");
else if (strcmp ("-wt", argv[c]) == 0)
strcpy (argv[c], "-W");
else if (strcmp ("-ct", argv[c]) == 0)
strcpy (argv[c], "-C");
}
while (true) {
c = getopt_long (argc, argv, "hVH:w:c:W:C:p:t:u", longopts,
&option);
if (c == -1 || c == EOF)
break;
switch (c) {
case '?': /* print short usage statement if args not parsable */
usage5 ();
case 'h': /* help */
print_help ();
exit (STATE_UNKNOWN);
case 'V': /* version */
print_revision (progname, NP_VERSION);
exit (STATE_UNKNOWN);
case 'H': /* hostname */
if (!is_host (optarg))
usage2 (_("Invalid hostname/address"), optarg);
server_address = optarg;
break;
case 'w': /* warning-variance */
if (is_intnonneg (optarg)) {
warning_diff = strtoul (optarg, NULL, 10);
check_warning_diff = true;
}
else if (strspn (optarg, "0123456789:,") > 0) {
if (sscanf (optarg, "%lu%*[:,]%d", &warning_diff, &warning_time) == 2) {
check_warning_diff = true;
check_warning_time = true;
}
else {
usage4 (_("Warning thresholds must be a positive integer"));
}
}
else {
usage4 (_("Warning threshold must be a positive integer"));
}
break;
case 'c': /* critical-variance */
if (is_intnonneg (optarg)) {
critical_diff = strtoul (optarg, NULL, 10);
check_critical_diff = true;
}
else if (strspn (optarg, "0123456789:,") > 0) {
if (sscanf (optarg, "%lu%*[:,]%d", &critical_diff, &critical_time) ==
2) {
check_critical_diff = true;
check_critical_time = true;
}
else {
usage4 (_("Critical thresholds must be a positive integer"));
}
}
else {
usage4 (_("Critical threshold must be a positive integer"));
}
break;
case 'W': /* warning-connect */
if (!is_intnonneg (optarg))
usage4 (_("Warning threshold must be a positive integer"));
else
warning_time = atoi (optarg);
check_warning_time = true;
break;
case 'C': /* critical-connect */
if (!is_intnonneg (optarg))
usage4 (_("Critical threshold must be a positive integer"));
else
critical_time = atoi (optarg);
check_critical_time = true;
break;
case 'p': /* port */
if (!is_intnonneg (optarg))
usage4 (_("Port must be a positive integer"));
else
server_port = atoi (optarg);
break;
case 't': /* timeout */
if (!is_intnonneg (optarg))
usage2 (_("Timeout interval must be a positive integer"), optarg);
else
socket_timeout = atoi (optarg);
break;
case 'u': /* udp */
use_udp = true;
}
}
c = optind;
if (server_address == NULL) {
if (argc > c) {
if (!is_host (argv[c]))
usage2 (_("Invalid hostname/address"), optarg);
server_address = argv[c];
}
else {
usage4 (_("Hostname was not supplied"));
}
}
return OK;
}
void
print_help (void)
{
char *myport;
xasprintf (&myport, "%d", TIME_PORT);
print_revision (progname, NP_VERSION);
printf ("Copyright (c) 1999 Ethan Galstad\n");
printf (COPYRIGHT, copyright, email);
printf ("%s\n", _("This plugin will check the time on the specified host."));
printf ("\n\n");
print_usage ();
printf (UT_HELP_VRSN);
printf (UT_EXTRA_OPTS);
printf (UT_HOST_PORT, 'p', myport);
printf (" %s\n", "-u, --udp");
printf (" %s\n", _("Use UDP to connect, not TCP"));
printf (" %s\n", "-w, --warning-variance=INTEGER");
printf (" %s\n", _("Time difference (sec.) necessary to result in a warning status"));
printf (" %s\n", "-c, --critical-variance=INTEGER");
printf (" %s\n", _("Time difference (sec.) necessary to result in a critical status"));
printf (" %s\n", "-W, --warning-connect=INTEGER");
printf (" %s\n", _("Response time (sec.) necessary to result in warning status"));
printf (" %s\n", "-C, --critical-connect=INTEGER");
printf (" %s\n", _("Response time (sec.) necessary to result in critical status"));
printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
printf (UT_SUPPORT);
}
void
print_usage (void)
{
printf ("%s\n", _("Usage:"));
printf ("%s -H <host_address> [-p port] [-u] [-w variance] [-c variance]\n",progname);
printf (" [-W connect_time] [-C connect_time] [-t timeout]\n");
}
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