plugins/check_real.c

   1 /******************************************************************************
   2 *
   3 * Nagios check_real plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999-2006 nagios-plugins team
   7 *
   8 * Last Modified: $Date$
   9 *
  10 * Description:
  11 *
  12 * This file contains the check_real plugin
  13 *
  14 *  This plugin tests the REAL service on the specified host.
  15 *
  16 *
  17 * License Information:
  18 *
  19 * This program is free software; you can redistribute it and/or modify
  20 * it under the terms of the GNU General Public License as published by
  21 * the Free Software Foundation; either version 2 of the License, or
  22 * (at your option) any later version.
  23 *
  24 * This program is distributed in the hope that it will be useful,
  25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27 * GNU General Public License for more details.
  28 *
  29 * You should have received a copy of the GNU General Public License
  30 * along with this program; if not, write to the Free Software
  31 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  32 *
  33 *
  34 * $Id$
  35 *
  36 ******************************************************************************/
  37
  38 const char *progname = "check_real";
  39 const char *revision = "$Revision$";
  40 const char *copyright = "2000-2006";
  41 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  42
  43 #include "common.h"
  44 #include "netutils.h"
  45 #include "utils.h"
  46
  47 enum {
  48         PORT    = 554
  49 };
  50
  51 #define EXPECT  "RTSP/1."
  52 #define URL     ""
  53
  54 int process_arguments (int, char **);
  55 int validate_arguments (void);
  56 void print_help (void);
  57 void print_usage (void);
  58
  59 int server_port = PORT;
  60 char *server_address;
  61 char *host_name;
  62 char *server_url = NULL;
  63 char *server_expect;
  64 int warning_time = 0;
  65 int check_warning_time = FALSE;
  66 int critical_time = 0;
  67 int check_critical_time = FALSE;
  68 int verbose = FALSE;
  69
  70
  71
  72 int
  73 main (int argc, char **argv)
  74 {
  75         int sd;
  76         int result = STATE_UNKNOWN;
  77         char buffer[MAX_INPUT_BUFFER];
  78         char *status_line = NULL;
  79
  80         setlocale (LC_ALL, "");
  81         bindtextdomain (PACKAGE, LOCALEDIR);
  82         textdomain (PACKAGE);
  83
  84         if (process_arguments (argc, argv) == ERROR)
  85                 usage4 (_("Could not parse arguments"));
  86
  87         /* initialize alarm signal handling */
  88         signal (SIGALRM, socket_timeout_alarm_handler);
  89
  90         /* set socket timeout */
  91         alarm (socket_timeout);
  92         time (&start_time);
  93
  94         /* try to connect to the host at the given port number */
  95         if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
  96                 die (STATE_CRITICAL, _("Unable to connect to %s on port %d\n"),
  97                                                          server_address, server_port);
  98
  99         /* Part I - Server Check */
 100
 101         /* send the OPTIONS request */
 102         sprintf (buffer, "OPTIONS rtsp://%s:%d RTSP/1.0\r\n", host_name, server_port);
 103         result = send (sd, buffer, strlen (buffer), 0);
 104
 105         /* send the header sync */
 106         sprintf (buffer, "CSeq: 1\r\n");
 107         result = send (sd, buffer, strlen (buffer), 0);
 108
 109         /* send a newline so the server knows we're done with the request */
 110         sprintf (buffer, "\r\n");
 111         result = send (sd, buffer, strlen (buffer), 0);
 112
 113         /* watch for the REAL connection string */
 114         result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
 115
 116         /* return a CRITICAL status if we couldn't read any data */
 117         if (result == -1)
 118                 die (STATE_CRITICAL, _("No data received from %s\n"), host_name);
 119
 120         /* make sure we find the response we are looking for */
 121         if (!strstr (buffer, server_expect)) {
 122                 if (server_port == PORT)
 123                         printf ("%s\n", _("Invalid REAL response received from host"));
 124                 else
 125                         printf (_("Invalid REAL response received from host on port %d\n"),
 126                                                         server_port);
 127         }
 128         else {
 129                 /* else we got the REAL string, so check the return code */
 130
 131                 time (&end_time);
 132
 133                 result = STATE_OK;
 134
 135                 status_line = (char *) strtok (buffer, "\n");
 136
 137                 if (strstr (status_line, "200"))
 138                         result = STATE_OK;
 139
 140                 /* client errors result in a warning state */
 141                 else if (strstr (status_line, "400"))
 142                         result = STATE_WARNING;
 143                 else if (strstr (status_line, "401"))
 144                         result = STATE_WARNING;
 145                 else if (strstr (status_line, "402"))
 146                         result = STATE_WARNING;
 147                 else if (strstr (status_line, "403"))
 148                         result = STATE_WARNING;
 149                 else if (strstr (status_line, "404"))
 150                         result = STATE_WARNING;
 151
 152                 /* server errors result in a critical state */
 153                 else if (strstr (status_line, "500"))
 154                         result = STATE_CRITICAL;
 155                 else if (strstr (status_line, "501"))
 156                         result = STATE_CRITICAL;
 157                 else if (strstr (status_line, "502"))
 158                         result = STATE_CRITICAL;
 159                 else if (strstr (status_line, "503"))
 160                         result = STATE_CRITICAL;
 161
 162                 else
 163                         result = STATE_UNKNOWN;
 164         }
 165
 166         /* Part II - Check stream exists and is ok */
 167         if ((result == STATE_OK )&& (server_url != NULL) ) {
 168
 169                 /* Part I - Server Check */
 170
 171                 /* send the OPTIONS request */
 172                 sprintf (buffer, "DESCRIBE rtsp://%s:%d%s RTSP/1.0\n", host_name,
 173                                                  server_port, server_url);
 174                 result = send (sd, buffer, strlen (buffer), 0);
 175
 176                 /* send the header sync */
 177                 sprintf (buffer, "CSeq: 2\n");
 178                 result = send (sd, buffer, strlen (buffer), 0);
 179
 180                 /* send a newline so the server knows we're done with the request */
 181                 sprintf (buffer, "\n");
 182                 result = send (sd, buffer, strlen (buffer), 0);
 183
 184                 /* watch for the REAL connection string */
 185                 result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
 186
 187                 /* return a CRITICAL status if we couldn't read any data */
 188                 if (result == -1) {
 189                         printf (_("No data received from host\n"));
 190                         result = STATE_CRITICAL;
 191                 }
 192                 else {
 193                         /* make sure we find the response we are looking for */
 194                         if (!strstr (buffer, server_expect)) {
 195                                 if (server_port == PORT)
 196                                         printf ("%s\n", _("Invalid REAL response received from host"));
 197                                 else
 198                                         printf (_("Invalid REAL response received from host on port %d\n"),
 199                                                                         server_port);
 200                         }
 201                         else {
 202
 203                                 /* else we got the REAL string, so check the return code */
 204
 205                                 time (&end_time);
 206
 207                                 result = STATE_OK;
 208
 209                                 status_line = (char *) strtok (buffer, "\n");
 210
 211                                 if (strstr (status_line, "200"))
 212                                         result = STATE_OK;
 213
 214                                 /* client errors result in a warning state */
 215                                 else if (strstr (status_line, "400"))
 216                                         result = STATE_WARNING;
 217                                 else if (strstr (status_line, "401"))
 218                                         result = STATE_WARNING;
 219                                 else if (strstr (status_line, "402"))
 220                                         result = STATE_WARNING;
 221                                 else if (strstr (status_line, "403"))
 222                                         result = STATE_WARNING;
 223                                 else if (strstr (status_line, "404"))
 224                                         result = STATE_WARNING;
 225
 226                                 /* server errors result in a critical state */
 227                                 else if (strstr (status_line, "500"))
 228                                         result = STATE_CRITICAL;
 229                                 else if (strstr (status_line, "501"))
 230                                         result = STATE_CRITICAL;
 231                                 else if (strstr (status_line, "502"))
 232                                         result = STATE_CRITICAL;
 233                                 else if (strstr (status_line, "503"))
 234                                         result = STATE_CRITICAL;
 235
 236                                 else
 237                                         result = STATE_UNKNOWN;
 238                         }
 239                 }
 240         }
 241
 242         /* Return results */
 243         if (result == STATE_OK) {
 244
 245                 if (check_critical_time == TRUE
 246                                 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
 247                 else if (check_warning_time == TRUE
 248                                                  && (end_time - start_time) > warning_time) result =
 249                                 STATE_WARNING;
 250
 251                 /* Put some HTML in here to create a dynamic link */
 252                 printf (_("REAL %s - %d second response time\n"),
 253                                                 state_text (result),
 254                                                 (int) (end_time - start_time));
 255         }
 256         else
 257                 printf ("%s\n", status_line);
 258
 259         /* close the connection */
 260         close (sd);
 261
 262         /* reset the alarm */
 263         alarm (0);
 264
 265         return result;
 266 }
 267
 268
 269
 270 /* process command-line arguments */
 271 int
 272 process_arguments (int argc, char **argv)
 273 {
 274         int c;
 275
 276         int option = 0;
 277         static struct option longopts[] = {
 278                 {"hostname", required_argument, 0, 'H'},
 279                 {"IPaddress", required_argument, 0, 'I'},
 280                 {"expect", required_argument, 0, 'e'},
 281                 {"url", required_argument, 0, 'u'},
 282                 {"port", required_argument, 0, 'p'},
 283                 {"critical", required_argument, 0, 'c'},
 284                 {"warning", required_argument, 0, 'w'},
 285                 {"timeout", required_argument, 0, 't'},
 286                 {"verbose", no_argument, 0, 'v'},
 287                 {"version", no_argument, 0, 'V'},
 288                 {"help", no_argument, 0, 'h'},
 289                 {0, 0, 0, 0}
 290         };
 291
 292         if (argc < 2)
 293                 return ERROR;
 294
 295         for (c = 1; c < argc; c++) {
 296                 if (strcmp ("-to", argv[c]) == 0)
 297                         strcpy (argv[c], "-t");
 298                 else if (strcmp ("-wt", argv[c]) == 0)
 299                         strcpy (argv[c], "-w");
 300                 else if (strcmp ("-ct", argv[c]) == 0)
 301                         strcpy (argv[c], "-c");
 302         }
 303
 304         while (1) {
 305                 c = getopt_long (argc, argv, "+hvVI:H:e:u:p:w:c:t:", longopts,
 306                                                                          &option);
 307
 308                 if (c == -1 || c == EOF)
 309                         break;
 310
 311                 switch (c) {
 312                 case 'I':                                                                       /* hostname */
 313                 case 'H':                                                                       /* hostname */
 314                         if (server_address)
 315                                 break;
 316                         else if (is_host (optarg))
 317                                 server_address = optarg;
 318                         else
 319                                 usage2 (_("Invalid hostname/address"), optarg);
 320                         break;
 321                 case 'e':                                                                       /* string to expect in response header */
 322                         server_expect = optarg;
 323                         break;
 324                 case 'u':                                                                       /* server URL */
 325                         server_url = optarg;
 326                         break;
 327                 case 'p':                                                                       /* port */
 328                         if (is_intpos (optarg)) {
 329                                 server_port = atoi (optarg);
 330                         }
 331                         else {
 332                                 usage4 (_("Port must be a positive integer"));
 333                         }
 334                         break;
 335                 case 'w':                                                                       /* warning time threshold */
 336                         if (is_intnonneg (optarg)) {
 337                                 warning_time = atoi (optarg);
 338                                 check_warning_time = TRUE;
 339                         }
 340                         else {
 341                                 usage4 (_("Warning time must be a positive integer"));
 342                         }
 343                         break;
 344                 case 'c':                                                                       /* critical time threshold */
 345                         if (is_intnonneg (optarg)) {
 346                                 critical_time = atoi (optarg);
 347                                 check_critical_time = TRUE;
 348                         }
 349                         else {
 350                                 usage4 (_("Critical time must be a positive integer"));
 351                         }
 352                         break;
 353                 case 'v':                                                                       /* verbose */
 354                         verbose = TRUE;
 355                         break;
 356                 case 't':                                                                       /* timeout */
 357                         if (is_intnonneg (optarg)) {
 358                                 socket_timeout = atoi (optarg);
 359                         }
 360                         else {
 361                                 usage4 (_("Timeout interval must be a positive integer"));
 362                         }
 363                         break;
 364                 case 'V':                                                                       /* version */
 365                         print_revision (progname, revision);
 366                         exit (STATE_OK);
 367                 case 'h':                                                                       /* help */
 368                         print_help ();
 369                         exit (STATE_OK);
 370                 case '?':                                                                       /* usage */
 371                         usage5 ();
 372                 }
 373         }
 374
 375         c = optind;
 376         if (server_address==NULL && argc>c) {
 377                 if (is_host (argv[c])) {
 378                         server_address = argv[c++];
 379                 }
 380                 else {
 381                         usage2 (_("Invalid hostname/address"), argv[c]);
 382                 }
 383         }
 384
 385         if (server_address==NULL)
 386                 usage4 (_("You must provide a server to check"));
 387
 388         if (host_name==NULL)
 389                 host_name = strdup (server_address);
 390
 391         if (server_expect == NULL)
 392                 server_expect = strdup(EXPECT);
 393
 394         return validate_arguments ();
 395 }
 396
 397
 398
 399 int
 400 validate_arguments (void)
 401 {
 402         return OK;
 403 }
 404
 405
 406
 407 void
 408 print_help (void)
 409 {
 410         char *myport;
 411         asprintf (&myport, "%d", PORT);
 412
 413         print_revision (progname, revision);
 414
 415         printf ("Copyright (c) 1999 Pedro Leite <leite@cic.ua.pt>\n");
 416         printf (COPYRIGHT, copyright, email);
 417
 418         printf ("%s\n", _("This plugin tests the REAL service on the specified host."));
 419
 420   printf ("\n\n");
 421
 422         print_usage ();
 423
 424         printf (_(UT_HELP_VRSN));
 425
 426         printf (_(UT_HOST_PORT), 'p', myport);
 427
 428         printf (" %s\n", "-u, --url=STRING");
 429   printf ("    %s\n", _("Connect to this url"));
 430   printf (" %s\n", "-e, --expect=STRING");
 431   printf (_("String to expect in first line of server response (default: %s)\n"),
 432                EXPECT);
 433
 434         printf (_(UT_WARN_CRIT));
 435
 436         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 437
 438         printf (_(UT_VERBOSE));
 439
 440         printf ("%s\n", _("This plugin will attempt to open an RTSP connection with the host."));
 441   printf ("%s\n", _("Successul connects return STATE_OK, refusals and timeouts return"));
 442   printf ("%s\n", _("STATE_CRITICAL, other errors return STATE_UNKNOWN.  Successful connects,"));
 443   printf ("%s\n", _("but incorrect reponse messages from the host result in STATE_WARNING return"));
 444   printf ("%s\n", _("values."));
 445
 446         printf (_(UT_SUPPORT));
 447 }
 448
 449
 450
 451 void
 452 print_usage (void)
 453 {
 454   printf (_("Usage:"));
 455         printf ("%s -H host [-e expect] [-p port] [-w warn] [-c crit] [-t timeout] [-v]\n", progname);
 456 }