plugins/check_time.c

   1 /******************************************************************************
   2
   3  This program is free software; you can redistribute it and/or modify
   4  it under the terms of the GNU General Public License as published by
   5  the Free Software Foundation; either version 2 of the License, or
   6  (at your option) any later version.
   7
   8  This program is distributed in the hope that it will be useful,
   9  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  GNU General Public License for more details.
  12
  13  You should have received a copy of the GNU General Public License
  14  along with this program; if not, write to the Free Software
  15  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16
  17  $Id$
  18
  19 ******************************************************************************/
  20
  21 const char *progname = "check_time";
  22 const char *revision = "$Revision$";
  23 const char *copyright = "1999-2004";
  24 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  25
  26 #include "common.h"
  27 #include "netutils.h"
  28 #include "utils.h"
  29
  30 enum {
  31         TIME_PORT = 37
  32 };
  33
  34 #define UNIX_EPOCH 2208988800UL
  35
  36 unsigned long server_time, raw_server_time;
  37 time_t diff_time;
  38 int warning_time = 0;
  39 int check_warning_time = FALSE;
  40 int critical_time = 0;
  41 int check_critical_time = FALSE;
  42 unsigned long warning_diff = 0;
  43 int check_warning_diff = FALSE;
  44 unsigned long critical_diff = 0;
  45 int check_critical_diff = FALSE;
  46 int server_port = TIME_PORT;
  47 char *server_address = NULL;
  48 int use_udp = FALSE;
  49
  50 int process_arguments (int, char **);
  51 void print_help (void);
  52 void print_usage (void);
  53
  54 int
  55 main (int argc, char **argv)
  56 {
  57         int sd;
  58         int result = STATE_UNKNOWN;
  59         time_t conntime;
  60
  61         setlocale (LC_ALL, "");
  62         bindtextdomain (PACKAGE, LOCALEDIR);
  63         textdomain (PACKAGE);
  64
  65         if (process_arguments (argc, argv) != TRUE)
  66                 usage4 (_("Could not parse arguments"));
  67
  68         /* initialize alarm signal handling */
  69         signal (SIGALRM, socket_timeout_alarm_handler);
  70
  71         /* set socket timeout */
  72         alarm (socket_timeout);
  73         time (&start_time);
  74
  75         /* try to connect to the host at the given port number */
  76         if (use_udp) {
  77                 result = my_udp_connect (server_address, server_port, &sd);
  78         } else {
  79                 result = my_tcp_connect (server_address, server_port, &sd);
  80         }
  81
  82         if (result != STATE_OK) {
  83                 if (check_critical_time == TRUE)
  84                         result = STATE_CRITICAL;
  85                 else if (check_warning_time == TRUE)
  86                         result = STATE_WARNING;
  87                 else
  88                         result = STATE_UNKNOWN;
  89                 die (result,
  90                            _("TIME UNKNOWN - could not connect to server %s, port %d\n"),
  91                            server_address, server_port);
  92         }
  93
  94         if (use_udp) {
  95                 if (send (sd, "", 0, 0) < 0) {
  96                         if (check_critical_time == TRUE)
  97                                 result = STATE_CRITICAL;
  98                         else if (check_warning_time == TRUE)
  99                                 result = STATE_WARNING;
 100                         else
 101                                 result = STATE_UNKNOWN;
 102                         die (result,
 103                           _("TIME UNKNOWN - could not send UDP request to server %s, port %d\n"),
 104                           server_address, server_port);
 105                 }
 106         }
 107
 108         /* watch for the connection string */
 109         result = recv (sd, (void *)&raw_server_time, sizeof (raw_server_time), 0);
 110
 111         /* close the connection */
 112         close (sd);
 113
 114         /* reset the alarm */
 115         time (&end_time);
 116         alarm (0);
 117
 118         /* return a WARNING status if we couldn't read any data */
 119         if (result <= 0) {
 120                 if (check_critical_time == TRUE)
 121                         result = STATE_CRITICAL;
 122                 else if (check_warning_time == TRUE)
 123                         result = STATE_WARNING;
 124                 else
 125                         result = STATE_UNKNOWN;
 126                 die (result,
 127                                                          _("TIME UNKNOWN - no data received from server %s, port %d\n"),
 128                                                          server_address, server_port);
 129         }
 130
 131         result = STATE_OK;
 132
 133         conntime = (end_time - start_time);
 134         if (check_critical_time == TRUE && conntime > critical_time)
 135                 result = STATE_CRITICAL;
 136         else if (check_warning_time == TRUE && conntime > warning_time)
 137                 result = STATE_WARNING;
 138
 139         if (result != STATE_OK)
 140                 die (result, _("TIME %s - %d second response time|%s\n"),
 141                      state_text (result), (int)conntime,
 142                      perfdata ("time", (long)conntime, "s",
 143                                check_warning_time, (long)warning_time,
 144                                check_critical_time, (long)critical_time,
 145                                TRUE, 0, FALSE, 0));
 146
 147         server_time = ntohl (raw_server_time) - UNIX_EPOCH;
 148         if (server_time > (unsigned long)end_time)
 149                 diff_time = server_time - (unsigned long)end_time;
 150         else
 151                 diff_time = (unsigned long)end_time - server_time;
 152
 153         if (check_critical_diff == TRUE && diff_time > (time_t)critical_diff)
 154                 result = STATE_CRITICAL;
 155         else if (check_warning_diff == TRUE && diff_time > (time_t)warning_diff)
 156                 result = STATE_WARNING;
 157
 158         printf (_("TIME %s - %lu second time difference|%s %s\n"),
 159                 state_text (result), diff_time,
 160                 perfdata ("time", (long)conntime, "s",
 161                           check_warning_time, (long)warning_time,
 162                           check_critical_time, (long)critical_time,
 163                           TRUE, 0, FALSE, 0),
 164                 perfdata ("offset", (long)diff_time, "s",
 165                           check_warning_diff, (long)warning_diff,
 166                           check_critical_diff, (long)critical_diff,
 167                           TRUE, 0, FALSE, 0));
 168         return result;
 169 }
 170
 171
 172
 173 /* process command-line arguments */
 174 int
 175 process_arguments (int argc, char **argv)
 176 {
 177         int c;
 178
 179         int option = 0;
 180         static struct option longopts[] = {
 181                 {"hostname", required_argument, 0, 'H'},
 182                 {"warning-variance", required_argument, 0, 'w'},
 183                 {"critical-variance", required_argument, 0, 'c'},
 184                 {"warning-connect", required_argument, 0, 'W'},
 185                 {"critical-connect", required_argument, 0, 'C'},
 186                 {"port", required_argument, 0, 'p'},
 187                 {"udp", no_argument, 0, 'u'},
 188                 {"timeout", required_argument, 0, 't'},
 189                 {"version", no_argument, 0, 'V'},
 190                 {"help", no_argument, 0, 'h'},
 191                 {0, 0, 0, 0}
 192         };
 193
 194         if (argc < 2)
 195                 usage ("\n");
 196
 197         for (c = 1; c < argc; c++) {
 198                 if (strcmp ("-to", argv[c]) == 0)
 199                         strcpy (argv[c], "-t");
 200                 else if (strcmp ("-wd", argv[c]) == 0)
 201                         strcpy (argv[c], "-w");
 202                 else if (strcmp ("-cd", argv[c]) == 0)
 203                         strcpy (argv[c], "-c");
 204                 else if (strcmp ("-wt", argv[c]) == 0)
 205                         strcpy (argv[c], "-W");
 206                 else if (strcmp ("-ct", argv[c]) == 0)
 207                         strcpy (argv[c], "-C");
 208         }
 209
 210         while (1) {
 211                 c = getopt_long (argc, argv, "hVH:w:c:W:C:p:t:u", longopts,
 212                                                                          &option);
 213
 214                 if (c == -1 || c == EOF)
 215                         break;
 216
 217                 switch (c) {
 218                 case '?':                                                                       /* print short usage statement if args not parsable */
 219                         printf (_("%s: Unknown argument: %s\n\n"), progname, optarg);
 220                         print_usage ();
 221                         exit (STATE_UNKNOWN);
 222                 case 'h':                                                                       /* help */
 223                         print_help ();
 224                         exit (STATE_OK);
 225                 case 'V':                                                                       /* version */
 226                         print_revision (progname, revision);
 227                         exit (STATE_OK);
 228                 case 'H':                                                                       /* hostname */
 229                         if (is_host (optarg) == FALSE)
 230                                 usage2 (_("Invalid hostname/address"), optarg);
 231                         server_address = optarg;
 232                         break;
 233                 case 'w':                                                                       /* warning-variance */
 234                         if (is_intnonneg (optarg)) {
 235                                 warning_diff = strtoul (optarg, NULL, 10);
 236                                 check_warning_diff = TRUE;
 237                         }
 238                         else if (strspn (optarg, "0123456789:,") > 0) {
 239                                 if (sscanf (optarg, "%lu%*[:,]%d", &warning_diff, &warning_time) == 2) {
 240                                         check_warning_diff = TRUE;
 241                                         check_warning_time = TRUE;
 242                                 }
 243                                 else {
 244                                         usage (_("Warning thresholds must be a positive integer\n"));
 245                                 }
 246                         }
 247                         else {
 248                                 usage (_("Warning threshold must be a positive integer\n"));
 249                         }
 250                         break;
 251                 case 'c':                                                                       /* critical-variance */
 252                         if (is_intnonneg (optarg)) {
 253                                 critical_diff = strtoul (optarg, NULL, 10);
 254                                 check_critical_diff = TRUE;
 255                         }
 256                         else if (strspn (optarg, "0123456789:,") > 0) {
 257                                 if (sscanf (optarg, "%lu%*[:,]%d", &critical_diff, &critical_time) ==
 258                                                 2) {
 259                                         check_critical_diff = TRUE;
 260                                         check_critical_time = TRUE;
 261                                 }
 262                                 else {
 263                                         usage (_("Critical thresholds must be a positive integer\n"));
 264                                 }
 265                         }
 266                         else {
 267                                 usage (_("Critical threshold must be a positive integer\n"));
 268                         }
 269                         break;
 270                 case 'W':                                                                       /* warning-connect */
 271                         if (!is_intnonneg (optarg))
 272                                 usage (_("Warning threshold must be a positive integer\n"));
 273                         else
 274                                 warning_time = atoi (optarg);
 275                         check_warning_time = TRUE;
 276                         break;
 277                 case 'C':                                                                       /* critical-connect */
 278                         if (!is_intnonneg (optarg))
 279                                 usage (_("Critical threshold must be a positive integer\n"));
 280                         else
 281                                 critical_time = atoi (optarg);
 282                         check_critical_time = TRUE;
 283                         break;
 284                 case 'p':                                                                       /* port */
 285                         if (!is_intnonneg (optarg))
 286                                 usage (_("Port must be a positive integer\n"));
 287                         else
 288                                 server_port = atoi (optarg);
 289                         break;
 290                 case 't':                                                                       /* timeout */
 291                         if (!is_intnonneg (optarg))
 292                                 usage2 (_("Timeout interval must be a positive integer"), optarg);
 293                         else
 294                                 socket_timeout = atoi (optarg);
 295                         break;
 296                 case 'u':                                                                       /* udp */
 297                         use_udp = TRUE;
 298                 }
 299         }
 300
 301         c = optind;
 302         if (server_address == NULL) {
 303                 if (argc > c) {
 304                         if (is_host (argv[c]) == FALSE)
 305                                 usage2 (_("Invalid hostname/address"), optarg);
 306                         server_address = argv[c];
 307                 }
 308                 else {
 309                         usage (_("Hostname was not supplied\n"));
 310                 }
 311         }
 312
 313         return OK;
 314 }
 315
 316
 317
 318 void
 319 print_help (void)
 320 {
 321         char *myport;
 322         asprintf (&myport, "%d", TIME_PORT);
 323
 324         print_revision (progname, revision);
 325
 326         printf ("Copyright (c) 1999 Ethan Galstad\n");
 327         printf (COPYRIGHT, copyright, email);
 328
 329         printf (_("\
 330 This plugin will check the time on the specified host.\n\n"));
 331
 332         print_usage ();
 333
 334         printf (_(UT_HELP_VRSN));
 335
 336         printf (_(UT_HOST_PORT), 'p', myport);
 337
 338         printf (_("\
 339  -u, --udp\n\
 340     Use UDP to connect, not TCP\n\
 341  -w, --warning-variance=INTEGER\n\
 342     Time difference (sec.) necessary to result in a warning status\n\
 343  -c, --critical-variance=INTEGER\n\
 344     Time difference (sec.) necessary to result in a critical status\n\
 345  -W, --warning-connect=INTEGER\n\
 346     Response time (sec.) necessary to result in warning status\n\
 347  -C, --critical-connect=INTEGER\n\
 348     Response time (sec.) necessary to result in critical status\n"));
 349
 350         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 351
 352         printf (_(UT_SUPPORT));
 353 }
 354
 355
 356
 357 void
 358 print_usage (void)
 359 {
 360         printf ("\
 361 Usage: %s -H <host_address> [-p port] [-u] [-w variance] [-c variance]\n\
 362           [-W connect_time] [-C connect_time] [-t timeout]\n", progname);
 363 }