plugins/check_time.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_time plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999-2007 Nagios Plugins Development Team
   7 *
   8 * Last Modified: $Date$
   9 *
  10 * Description:
  11 *
  12 * This file contains the check_time plugin
  13 *
  14 * This plugin will check the time difference with the specified host.
  15 *
  16 *
  17 * This program is free software: you can redistribute it and/or modify
  18 * it under the terms of the GNU General Public License as published by
  19 * the Free Software Foundation, either version 3 of the License, or
  20 * (at your option) any later version.
  21 *
  22 * This program is distributed in the hope that it will be useful,
  23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25 * GNU General Public License for more details.
  26 *
  27 * You should have received a copy of the GNU General Public License
  28 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  29 *
  30 * $Id$
  31 *
  32 *****************************************************************************/
  33
  34 const char *progname = "check_time";
  35 const char *revision = "$Revision$";
  36 const char *copyright = "1999-2007";
  37 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  38
  39 #include "common.h"
  40 #include "netutils.h"
  41 #include "utils.h"
  42
  43 enum {
  44         TIME_PORT = 37
  45 };
  46
  47 #define UNIX_EPOCH 2208988800UL
  48
  49 uint32_t raw_server_time;
  50 unsigned long server_time, diff_time;
  51 int warning_time = 0;
  52 int check_warning_time = FALSE;
  53 int critical_time = 0;
  54 int check_critical_time = FALSE;
  55 unsigned long warning_diff = 0;
  56 int check_warning_diff = FALSE;
  57 unsigned long critical_diff = 0;
  58 int check_critical_diff = FALSE;
  59 int server_port = TIME_PORT;
  60 char *server_address = NULL;
  61 int use_udp = FALSE;
  62
  63 int process_arguments (int, char **);
  64 void print_help (void);
  65 void print_usage (void);
  66
  67 int
  68 main (int argc, char **argv)
  69 {
  70         int sd;
  71         int result = STATE_UNKNOWN;
  72         time_t conntime;
  73
  74         setlocale (LC_ALL, "");
  75         bindtextdomain (PACKAGE, LOCALEDIR);
  76         textdomain (PACKAGE);
  77
  78         /* Parse extra opts if any */
  79         argv=np_extra_opts (&argc, argv, progname);
  80
  81         if (process_arguments (argc, argv) == ERROR)
  82                 usage4 (_("Could not parse arguments"));
  83
  84         /* initialize alarm signal handling */
  85         signal (SIGALRM, socket_timeout_alarm_handler);
  86
  87         /* set socket timeout */
  88         alarm (socket_timeout);
  89         time (&start_time);
  90
  91         /* try to connect to the host at the given port number */
  92         if (use_udp) {
  93                 result = my_udp_connect (server_address, server_port, &sd);
  94         } else {
  95                 result = my_tcp_connect (server_address, server_port, &sd);
  96         }
  97
  98         if (result != STATE_OK) {
  99                 if (check_critical_time == TRUE)
 100                         result = STATE_CRITICAL;
 101                 else if (check_warning_time == TRUE)
 102                         result = STATE_WARNING;
 103                 else
 104                         result = STATE_UNKNOWN;
 105                 die (result,
 106                            _("TIME UNKNOWN - could not connect to server %s, port %d\n"),
 107                            server_address, server_port);
 108         }
 109
 110         if (use_udp) {
 111                 if (send (sd, "", 0, 0) < 0) {
 112                         if (check_critical_time == TRUE)
 113                                 result = STATE_CRITICAL;
 114                         else if (check_warning_time == TRUE)
 115                                 result = STATE_WARNING;
 116                         else
 117                                 result = STATE_UNKNOWN;
 118                         die (result,
 119                           _("TIME UNKNOWN - could not send UDP request to server %s, port %d\n"),
 120                           server_address, server_port);
 121                 }
 122         }
 123
 124         /* watch for the connection string */
 125         result = recv (sd, (void *)&raw_server_time, sizeof (raw_server_time), 0);
 126
 127         /* close the connection */
 128         close (sd);
 129
 130         /* reset the alarm */
 131         time (&end_time);
 132         alarm (0);
 133
 134         /* return a WARNING status if we couldn't read any data */
 135         if (result <= 0) {
 136                 if (check_critical_time == TRUE)
 137                         result = STATE_CRITICAL;
 138                 else if (check_warning_time == TRUE)
 139                         result = STATE_WARNING;
 140                 else
 141                         result = STATE_UNKNOWN;
 142                 die (result,
 143                                                          _("TIME UNKNOWN - no data received from server %s, port %d\n"),
 144                                                          server_address, server_port);
 145         }
 146
 147         result = STATE_OK;
 148
 149         conntime = (end_time - start_time);
 150         if (check_critical_time == TRUE && conntime > critical_time)
 151                 result = STATE_CRITICAL;
 152         else if (check_warning_time == TRUE && conntime > warning_time)
 153                 result = STATE_WARNING;
 154
 155         if (result != STATE_OK)
 156                 die (result, _("TIME %s - %d second response time|%s\n"),
 157                      state_text (result), (int)conntime,
 158                      perfdata ("time", (long)conntime, "s",
 159                                check_warning_time, (long)warning_time,
 160                                check_critical_time, (long)critical_time,
 161                                TRUE, 0, FALSE, 0));
 162
 163         server_time = ntohl (raw_server_time) - UNIX_EPOCH;
 164         if (server_time > (unsigned long)end_time)
 165                 diff_time = server_time - (unsigned long)end_time;
 166         else
 167                 diff_time = (unsigned long)end_time - server_time;
 168
 169         if (check_critical_diff == TRUE && diff_time > critical_diff)
 170                 result = STATE_CRITICAL;
 171         else if (check_warning_diff == TRUE && diff_time > warning_diff)
 172                 result = STATE_WARNING;
 173
 174         printf (_("TIME %s - %lu second time difference|%s %s\n"),
 175                 state_text (result), diff_time,
 176                 perfdata ("time", (long)conntime, "s",
 177                           check_warning_time, (long)warning_time,
 178                           check_critical_time, (long)critical_time,
 179                           TRUE, 0, FALSE, 0),
 180                 perfdata ("offset", diff_time, "s",
 181                           check_warning_diff, warning_diff,
 182                           check_critical_diff, critical_diff,
 183                           TRUE, 0, FALSE, 0));
 184         return result;
 185 }
 186
 187
 188
 189 /* process command-line arguments */
 190 int
 191 process_arguments (int argc, char **argv)
 192 {
 193         int c;
 194
 195         int option = 0;
 196         static struct option longopts[] = {
 197                 {"hostname", required_argument, 0, 'H'},
 198                 {"warning-variance", required_argument, 0, 'w'},
 199                 {"critical-variance", required_argument, 0, 'c'},
 200                 {"warning-connect", required_argument, 0, 'W'},
 201                 {"critical-connect", required_argument, 0, 'C'},
 202                 {"port", required_argument, 0, 'p'},
 203                 {"udp", no_argument, 0, 'u'},
 204                 {"timeout", required_argument, 0, 't'},
 205                 {"version", no_argument, 0, 'V'},
 206                 {"help", no_argument, 0, 'h'},
 207                 {0, 0, 0, 0}
 208         };
 209
 210         if (argc < 2)
 211                 usage ("\n");
 212
 213         for (c = 1; c < argc; c++) {
 214                 if (strcmp ("-to", argv[c]) == 0)
 215                         strcpy (argv[c], "-t");
 216                 else if (strcmp ("-wd", argv[c]) == 0)
 217                         strcpy (argv[c], "-w");
 218                 else if (strcmp ("-cd", argv[c]) == 0)
 219                         strcpy (argv[c], "-c");
 220                 else if (strcmp ("-wt", argv[c]) == 0)
 221                         strcpy (argv[c], "-W");
 222                 else if (strcmp ("-ct", argv[c]) == 0)
 223                         strcpy (argv[c], "-C");
 224         }
 225
 226         while (1) {
 227                 c = getopt_long (argc, argv, "hVH:w:c:W:C:p:t:u", longopts,
 228                                                                          &option);
 229
 230                 if (c == -1 || c == EOF)
 231                         break;
 232
 233                 switch (c) {
 234                 case '?':                                                                       /* print short usage statement if args not parsable */
 235                         usage5 ();
 236                 case 'h':                                                                       /* help */
 237                         print_help ();
 238                         exit (STATE_OK);
 239                 case 'V':                                                                       /* version */
 240                         print_revision (progname, revision);
 241                         exit (STATE_OK);
 242                 case 'H':                                                                       /* hostname */
 243                         if (is_host (optarg) == FALSE)
 244                                 usage2 (_("Invalid hostname/address"), optarg);
 245                         server_address = optarg;
 246                         break;
 247                 case 'w':                                                                       /* warning-variance */
 248                         if (is_intnonneg (optarg)) {
 249                                 warning_diff = strtoul (optarg, NULL, 10);
 250                                 check_warning_diff = TRUE;
 251                         }
 252                         else if (strspn (optarg, "0123456789:,") > 0) {
 253                                 if (sscanf (optarg, "%lu%*[:,]%d", &warning_diff, &warning_time) == 2) {
 254                                         check_warning_diff = TRUE;
 255                                         check_warning_time = TRUE;
 256                                 }
 257                                 else {
 258                                         usage4 (_("Warning thresholds must be a positive integer"));
 259                                 }
 260                         }
 261                         else {
 262                                 usage4 (_("Warning threshold must be a positive integer"));
 263                         }
 264                         break;
 265                 case 'c':                                                                       /* critical-variance */
 266                         if (is_intnonneg (optarg)) {
 267                                 critical_diff = strtoul (optarg, NULL, 10);
 268                                 check_critical_diff = TRUE;
 269                         }
 270                         else if (strspn (optarg, "0123456789:,") > 0) {
 271                                 if (sscanf (optarg, "%lu%*[:,]%d", &critical_diff, &critical_time) ==
 272                                                 2) {
 273                                         check_critical_diff = TRUE;
 274                                         check_critical_time = TRUE;
 275                                 }
 276                                 else {
 277                                         usage4 (_("Critical thresholds must be a positive integer"));
 278                                 }
 279                         }
 280                         else {
 281                                 usage4 (_("Critical threshold must be a positive integer"));
 282                         }
 283                         break;
 284                 case 'W':                                                                       /* warning-connect */
 285                         if (!is_intnonneg (optarg))
 286                                 usage4 (_("Warning threshold must be a positive integer"));
 287                         else
 288                                 warning_time = atoi (optarg);
 289                         check_warning_time = TRUE;
 290                         break;
 291                 case 'C':                                                                       /* critical-connect */
 292                         if (!is_intnonneg (optarg))
 293                                 usage4 (_("Critical threshold must be a positive integer"));
 294                         else
 295                                 critical_time = atoi (optarg);
 296                         check_critical_time = TRUE;
 297                         break;
 298                 case 'p':                                                                       /* port */
 299                         if (!is_intnonneg (optarg))
 300                                 usage4 (_("Port must be a positive integer"));
 301                         else
 302                                 server_port = atoi (optarg);
 303                         break;
 304                 case 't':                                                                       /* timeout */
 305                         if (!is_intnonneg (optarg))
 306                                 usage2 (_("Timeout interval must be a positive integer"), optarg);
 307                         else
 308                                 socket_timeout = atoi (optarg);
 309                         break;
 310                 case 'u':                                                                       /* udp */
 311                         use_udp = TRUE;
 312                 }
 313         }
 314
 315         c = optind;
 316         if (server_address == NULL) {
 317                 if (argc > c) {
 318                         if (is_host (argv[c]) == FALSE)
 319                                 usage2 (_("Invalid hostname/address"), optarg);
 320                         server_address = argv[c];
 321                 }
 322                 else {
 323                         usage4 (_("Hostname was not supplied"));
 324                 }
 325         }
 326
 327         return OK;
 328 }
 329
 330
 331
 332 void
 333 print_help (void)
 334 {
 335         char *myport;
 336         asprintf (&myport, "%d", TIME_PORT);
 337
 338         print_revision (progname, revision);
 339
 340         printf ("Copyright (c) 1999 Ethan Galstad\n");
 341         printf (COPYRIGHT, copyright, email);
 342
 343         printf ("%s\n", _("This plugin will check the time on the specified host."));
 344
 345   printf ("\n\n");
 346
 347         print_usage ();
 348
 349         printf (_(UT_HELP_VRSN));
 350         printf (_(UT_EXTRA_OPTS));
 351
 352         printf (_(UT_HOST_PORT), 'p', myport);
 353
 354         printf (" %s\n", "-u, --udp");
 355   printf ("   %s\n", _("Use UDP to connect, not TCP"));
 356   printf (" %s\n", "-w, --warning-variance=INTEGER");
 357   printf ("   %s\n", _("Time difference (sec.) necessary to result in a warning status"));
 358   printf (" %s\n", "-c, --critical-variance=INTEGER");
 359   printf ("   %s\n", _("Time difference (sec.) necessary to result in a critical status"));
 360   printf (" %s\n", "-W, --warning-connect=INTEGER");
 361   printf ("   %s\n", _("Response time (sec.) necessary to result in warning status"));
 362   printf (" %s\n", "-C, --critical-connect=INTEGER");
 363   printf ("   %s\n", _("Response time (sec.) necessary to result in critical status"));
 364
 365         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 366
 367 #ifdef NP_EXTRA_OPTS
 368         printf ("\n");
 369         printf ("%s\n", _("Notes:"));
 370         printf (_(UT_EXTRA_OPTS_NOTES));
 371 #endif
 372
 373         printf (_(UT_SUPPORT));
 374 }
 375
 376
 377
 378 void
 379 print_usage (void)
 380 {
 381   printf (_("Usage:"));
 382         printf ("%s -H <host_address> [-p port] [-u] [-w variance] [-c variance]\n",progname);
 383   printf (" [-W connect_time] [-C connect_time] [-t timeout]\n");
 384 }