plugins/check_real.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_real plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 2000-2007 Nagios Plugins Development Team
   7 *
   8 * Description:
   9 *
  10 * This file contains the check_real plugin
  11 *
  12 * This plugin tests the REAL service on the specified host.
  13 *
  14 *
  15 * This program is free software: you can redistribute it and/or modify
  16 * it under the terms of the GNU General Public License as published by
  17 * the Free Software Foundation, either version 3 of the License, or
  18 * (at your option) any later version.
  19 *
  20 * This program is distributed in the hope that it will be useful,
  21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 * GNU General Public License for more details.
  24 *
  25 * You should have received a copy of the GNU General Public License
  26 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  27 *
  28 *
  29 *****************************************************************************/
  30
  31 const char *progname = "check_real";
  32 const char *copyright = "2000-2007";
  33 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  34
  35 #include "common.h"
  36 #include "netutils.h"
  37 #include "utils.h"
  38
  39 enum {
  40         PORT    = 554
  41 };
  42
  43 #define EXPECT  "RTSP/1."
  44 #define URL     ""
  45
  46 int process_arguments (int, char **);
  47 int validate_arguments (void);
  48 void print_help (void);
  49 void print_usage (void);
  50
  51 int server_port = PORT;
  52 char *server_address;
  53 char *host_name;
  54 char *server_url = NULL;
  55 char *server_expect;
  56 int warning_time = 0;
  57 int check_warning_time = FALSE;
  58 int critical_time = 0;
  59 int check_critical_time = FALSE;
  60 int verbose = FALSE;
  61
  62
  63
  64 int
  65 main (int argc, char **argv)
  66 {
  67         int sd;
  68         int result = STATE_UNKNOWN;
  69         char buffer[MAX_INPUT_BUFFER];
  70         char *status_line = NULL;
  71
  72         setlocale (LC_ALL, "");
  73         bindtextdomain (PACKAGE, LOCALEDIR);
  74         textdomain (PACKAGE);
  75
  76         /* Parse extra opts if any */
  77         argv=np_extra_opts (&argc, argv, progname);
  78
  79         if (process_arguments (argc, argv) == ERROR)
  80                 usage4 (_("Could not parse arguments"));
  81
  82         /* initialize alarm signal handling */
  83         signal (SIGALRM, socket_timeout_alarm_handler);
  84
  85         /* set socket timeout */
  86         alarm (socket_timeout);
  87         time (&start_time);
  88
  89         /* try to connect to the host at the given port number */
  90         if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
  91                 die (STATE_CRITICAL, _("Unable to connect to %s on port %d\n"),
  92                                                          server_address, server_port);
  93
  94         /* Part I - Server Check */
  95
  96         /* send the OPTIONS request */
  97         sprintf (buffer, "OPTIONS rtsp://%s:%d RTSP/1.0\r\n", host_name, server_port);
  98         result = send (sd, buffer, strlen (buffer), 0);
  99
 100         /* send the header sync */
 101         sprintf (buffer, "CSeq: 1\r\n");
 102         result = send (sd, buffer, strlen (buffer), 0);
 103
 104         /* send a newline so the server knows we're done with the request */
 105         sprintf (buffer, "\r\n");
 106         result = send (sd, buffer, strlen (buffer), 0);
 107
 108         /* watch for the REAL connection string */
 109         result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
 110
 111         /* return a CRITICAL status if we couldn't read any data */
 112         if (result == -1)
 113                 die (STATE_CRITICAL, _("No data received from %s\n"), host_name);
 114
 115         /* make sure we find the response we are looking for */
 116         if (!strstr (buffer, server_expect)) {
 117                 if (server_port == PORT)
 118                         printf ("%s\n", _("Invalid REAL response received from host"));
 119                 else
 120                         printf (_("Invalid REAL response received from host on port %d\n"),
 121                                                         server_port);
 122         }
 123         else {
 124                 /* else we got the REAL string, so check the return code */
 125
 126                 time (&end_time);
 127
 128                 result = STATE_OK;
 129
 130                 status_line = (char *) strtok (buffer, "\n");
 131
 132                 if (strstr (status_line, "200"))
 133                         result = STATE_OK;
 134
 135                 /* client errors result in a warning state */
 136                 else if (strstr (status_line, "400"))
 137                         result = STATE_WARNING;
 138                 else if (strstr (status_line, "401"))
 139                         result = STATE_WARNING;
 140                 else if (strstr (status_line, "402"))
 141                         result = STATE_WARNING;
 142                 else if (strstr (status_line, "403"))
 143                         result = STATE_WARNING;
 144                 else if (strstr (status_line, "404"))
 145                         result = STATE_WARNING;
 146
 147                 /* server errors result in a critical state */
 148                 else if (strstr (status_line, "500"))
 149                         result = STATE_CRITICAL;
 150                 else if (strstr (status_line, "501"))
 151                         result = STATE_CRITICAL;
 152                 else if (strstr (status_line, "502"))
 153                         result = STATE_CRITICAL;
 154                 else if (strstr (status_line, "503"))
 155                         result = STATE_CRITICAL;
 156
 157                 else
 158                         result = STATE_UNKNOWN;
 159         }
 160
 161         /* Part II - Check stream exists and is ok */
 162         if ((result == STATE_OK )&& (server_url != NULL) ) {
 163
 164                 /* Part I - Server Check */
 165
 166                 /* send the OPTIONS request */
 167                 sprintf (buffer, "DESCRIBE rtsp://%s:%d%s RTSP/1.0\n", host_name,
 168                                                  server_port, server_url);
 169                 result = send (sd, buffer, strlen (buffer), 0);
 170
 171                 /* send the header sync */
 172                 sprintf (buffer, "CSeq: 2\n");
 173                 result = send (sd, buffer, strlen (buffer), 0);
 174
 175                 /* send a newline so the server knows we're done with the request */
 176                 sprintf (buffer, "\n");
 177                 result = send (sd, buffer, strlen (buffer), 0);
 178
 179                 /* watch for the REAL connection string */
 180                 result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
 181
 182                 /* return a CRITICAL status if we couldn't read any data */
 183                 if (result == -1) {
 184                         printf (_("No data received from host\n"));
 185                         result = STATE_CRITICAL;
 186                 }
 187                 else {
 188                         /* make sure we find the response we are looking for */
 189                         if (!strstr (buffer, server_expect)) {
 190                                 if (server_port == PORT)
 191                                         printf ("%s\n", _("Invalid REAL response received from host"));
 192                                 else
 193                                         printf (_("Invalid REAL response received from host on port %d\n"),
 194                                                                         server_port);
 195                         }
 196                         else {
 197
 198                                 /* else we got the REAL string, so check the return code */
 199
 200                                 time (&end_time);
 201
 202                                 result = STATE_OK;
 203
 204                                 status_line = (char *) strtok (buffer, "\n");
 205
 206                                 if (strstr (status_line, "200"))
 207                                         result = STATE_OK;
 208
 209                                 /* client errors result in a warning state */
 210                                 else if (strstr (status_line, "400"))
 211                                         result = STATE_WARNING;
 212                                 else if (strstr (status_line, "401"))
 213                                         result = STATE_WARNING;
 214                                 else if (strstr (status_line, "402"))
 215                                         result = STATE_WARNING;
 216                                 else if (strstr (status_line, "403"))
 217                                         result = STATE_WARNING;
 218                                 else if (strstr (status_line, "404"))
 219                                         result = STATE_WARNING;
 220
 221                                 /* server errors result in a critical state */
 222                                 else if (strstr (status_line, "500"))
 223                                         result = STATE_CRITICAL;
 224                                 else if (strstr (status_line, "501"))
 225                                         result = STATE_CRITICAL;
 226                                 else if (strstr (status_line, "502"))
 227                                         result = STATE_CRITICAL;
 228                                 else if (strstr (status_line, "503"))
 229                                         result = STATE_CRITICAL;
 230
 231                                 else
 232                                         result = STATE_UNKNOWN;
 233                         }
 234                 }
 235         }
 236
 237         /* Return results */
 238         if (result == STATE_OK) {
 239
 240                 if (check_critical_time == TRUE
 241                                 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
 242                 else if (check_warning_time == TRUE
 243                                                  && (end_time - start_time) > warning_time) result =
 244                                 STATE_WARNING;
 245
 246                 /* Put some HTML in here to create a dynamic link */
 247                 printf (_("REAL %s - %d second response time\n"),
 248                                                 state_text (result),
 249                                                 (int) (end_time - start_time));
 250         }
 251         else
 252                 printf ("%s\n", status_line);
 253
 254         /* close the connection */
 255         close (sd);
 256
 257         /* reset the alarm */
 258         alarm (0);
 259
 260         return result;
 261 }
 262
 263
 264
 265 /* process command-line arguments */
 266 int
 267 process_arguments (int argc, char **argv)
 268 {
 269         int c;
 270
 271         int option = 0;
 272         static struct option longopts[] = {
 273                 {"hostname", required_argument, 0, 'H'},
 274                 {"IPaddress", required_argument, 0, 'I'},
 275                 {"expect", required_argument, 0, 'e'},
 276                 {"url", required_argument, 0, 'u'},
 277                 {"port", required_argument, 0, 'p'},
 278                 {"critical", required_argument, 0, 'c'},
 279                 {"warning", required_argument, 0, 'w'},
 280                 {"timeout", required_argument, 0, 't'},
 281                 {"verbose", no_argument, 0, 'v'},
 282                 {"version", no_argument, 0, 'V'},
 283                 {"help", no_argument, 0, 'h'},
 284                 {0, 0, 0, 0}
 285         };
 286
 287         if (argc < 2)
 288                 return ERROR;
 289
 290         for (c = 1; c < argc; c++) {
 291                 if (strcmp ("-to", argv[c]) == 0)
 292                         strcpy (argv[c], "-t");
 293                 else if (strcmp ("-wt", argv[c]) == 0)
 294                         strcpy (argv[c], "-w");
 295                 else if (strcmp ("-ct", argv[c]) == 0)
 296                         strcpy (argv[c], "-c");
 297         }
 298
 299         while (1) {
 300                 c = getopt_long (argc, argv, "+hvVI:H:e:u:p:w:c:t:", longopts,
 301                                                                          &option);
 302
 303                 if (c == -1 || c == EOF)
 304                         break;
 305
 306                 switch (c) {
 307                 case 'I':                                                                       /* hostname */
 308                 case 'H':                                                                       /* hostname */
 309                         if (server_address)
 310                                 break;
 311                         else if (is_host (optarg))
 312                                 server_address = optarg;
 313                         else
 314                                 usage2 (_("Invalid hostname/address"), optarg);
 315                         break;
 316                 case 'e':                                                                       /* string to expect in response header */
 317                         server_expect = optarg;
 318                         break;
 319                 case 'u':                                                                       /* server URL */
 320                         server_url = optarg;
 321                         break;
 322                 case 'p':                                                                       /* port */
 323                         if (is_intpos (optarg)) {
 324                                 server_port = atoi (optarg);
 325                         }
 326                         else {
 327                                 usage4 (_("Port must be a positive integer"));
 328                         }
 329                         break;
 330                 case 'w':                                                                       /* warning time threshold */
 331                         if (is_intnonneg (optarg)) {
 332                                 warning_time = atoi (optarg);
 333                                 check_warning_time = TRUE;
 334                         }
 335                         else {
 336                                 usage4 (_("Warning time must be a positive integer"));
 337                         }
 338                         break;
 339                 case 'c':                                                                       /* critical time threshold */
 340                         if (is_intnonneg (optarg)) {
 341                                 critical_time = atoi (optarg);
 342                                 check_critical_time = TRUE;
 343                         }
 344                         else {
 345                                 usage4 (_("Critical time must be a positive integer"));
 346                         }
 347                         break;
 348                 case 'v':                                                                       /* verbose */
 349                         verbose = TRUE;
 350                         break;
 351                 case 't':                                                                       /* timeout */
 352                         if (is_intnonneg (optarg)) {
 353                                 socket_timeout = atoi (optarg);
 354                         }
 355                         else {
 356                                 usage4 (_("Timeout interval must be a positive integer"));
 357                         }
 358                         break;
 359                 case 'V':                                                                       /* version */
 360                         print_revision (progname, NP_VERSION);
 361                         exit (STATE_OK);
 362                 case 'h':                                                                       /* help */
 363                         print_help ();
 364                         exit (STATE_OK);
 365                 case '?':                                                                       /* usage */
 366                         usage5 ();
 367                 }
 368         }
 369
 370         c = optind;
 371         if (server_address==NULL && argc>c) {
 372                 if (is_host (argv[c])) {
 373                         server_address = argv[c++];
 374                 }
 375                 else {
 376                         usage2 (_("Invalid hostname/address"), argv[c]);
 377                 }
 378         }
 379
 380         if (server_address==NULL)
 381                 usage4 (_("You must provide a server to check"));
 382
 383         if (host_name==NULL)
 384                 host_name = strdup (server_address);
 385
 386         if (server_expect == NULL)
 387                 server_expect = strdup(EXPECT);
 388
 389         return validate_arguments ();
 390 }
 391
 392
 393
 394 int
 395 validate_arguments (void)
 396 {
 397         return OK;
 398 }
 399
 400
 401
 402 void
 403 print_help (void)
 404 {
 405         char *myport;
 406         asprintf (&myport, "%d", PORT);
 407
 408         print_revision (progname, NP_VERSION);
 409
 410         printf ("Copyright (c) 1999 Pedro Leite <leite@cic.ua.pt>\n");
 411         printf (COPYRIGHT, copyright, email);
 412
 413         printf ("%s\n", _("This plugin tests the REAL service on the specified host."));
 414
 415   printf ("\n\n");
 416
 417         print_usage ();
 418
 419         printf (UT_HELP_VRSN);
 420         printf (UT_EXTRA_OPTS);
 421
 422         printf (UT_HOST_PORT, 'p', myport);
 423
 424         printf (" %s\n", "-u, --url=STRING");
 425   printf ("    %s\n", _("Connect to this url"));
 426   printf (" %s\n", "-e, --expect=STRING");
 427   printf (_("String to expect in first line of server response (default: %s)\n"),
 428                EXPECT);
 429
 430         printf (UT_WARN_CRIT);
 431
 432         printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
 433
 434         printf (UT_VERBOSE);
 435
 436   printf ("\n");
 437         printf ("%s\n", _("This plugin will attempt to open an RTSP connection with the host."));
 438   printf ("%s\n", _("Successul connects return STATE_OK, refusals and timeouts return"));
 439   printf ("%s\n", _("STATE_CRITICAL, other errors return STATE_UNKNOWN.  Successful connects,"));
 440   printf ("%s\n", _("but incorrect reponse messages from the host result in STATE_WARNING return"));
 441   printf ("%s\n", _("values."));
 442
 443 #ifdef NP_EXTRA_OPTS
 444   printf ("\n");
 445   printf ("%s\n", _("Notes:"));
 446   printf (UT_EXTRA_OPTS_NOTES);
 447 #endif
 448
 449         printf (UT_SUPPORT);
 450 }
 451
 452
 453
 454 void
 455 print_usage (void)
 456 {
 457   printf (_("Usage:"));
 458         printf ("%s -H host [-e expect] [-p port] [-w warn] [-c crit] [-t timeout] [-v]\n", progname);
 459 }