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 * 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 * 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_real";
  35 const char *revision = "$Revision$";
  36 const char *copyright = "2000-2007";
  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         PORT    = 554
  45 };
  46
  47 #define EXPECT  "RTSP/1."
  48 #define URL     ""
  49
  50 int process_arguments (int, char **);
  51 int validate_arguments (void);
  52 void print_help (void);
  53 void print_usage (void);
  54
  55 int server_port = PORT;
  56 char *server_address;
  57 char *host_name;
  58 char *server_url = NULL;
  59 char *server_expect;
  60 int warning_time = 0;
  61 int check_warning_time = FALSE;
  62 int critical_time = 0;
  63 int check_critical_time = FALSE;
  64 int verbose = FALSE;
  65
  66
  67
  68 int
  69 main (int argc, char **argv)
  70 {
  71         int sd;
  72         int result = STATE_UNKNOWN;
  73         char buffer[MAX_INPUT_BUFFER];
  74         char *status_line = NULL;
  75
  76         setlocale (LC_ALL, "");
  77         bindtextdomain (PACKAGE, LOCALEDIR);
  78         textdomain (PACKAGE);
  79
  80         /* Parse extra opts if any */
  81         argv=np_extra_opts (&argc, argv, progname);
  82
  83         if (process_arguments (argc, argv) == ERROR)
  84                 usage4 (_("Could not parse arguments"));
  85
  86         /* initialize alarm signal handling */
  87         signal (SIGALRM, socket_timeout_alarm_handler);
  88
  89         /* set socket timeout */
  90         alarm (socket_timeout);
  91         time (&start_time);
  92
  93         /* try to connect to the host at the given port number */
  94         if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
  95                 die (STATE_CRITICAL, _("Unable to connect to %s on port %d\n"),
  96                                                          server_address, server_port);
  97
  98         /* Part I - Server Check */
  99
 100         /* send the OPTIONS request */
 101         sprintf (buffer, "OPTIONS rtsp://%s:%d RTSP/1.0\r\n", host_name, server_port);
 102         result = send (sd, buffer, strlen (buffer), 0);
 103
 104         /* send the header sync */
 105         sprintf (buffer, "CSeq: 1\r\n");
 106         result = send (sd, buffer, strlen (buffer), 0);
 107
 108         /* send a newline so the server knows we're done with the request */
 109         sprintf (buffer, "\r\n");
 110         result = send (sd, buffer, strlen (buffer), 0);
 111
 112         /* watch for the REAL connection string */
 113         result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
 114
 115         /* return a CRITICAL status if we couldn't read any data */
 116         if (result == -1)
 117                 die (STATE_CRITICAL, _("No data received from %s\n"), host_name);
 118
 119         /* make sure we find the response we are looking for */
 120         if (!strstr (buffer, server_expect)) {
 121                 if (server_port == PORT)
 122                         printf ("%s\n", _("Invalid REAL response received from host"));
 123                 else
 124                         printf (_("Invalid REAL response received from host on port %d\n"),
 125                                                         server_port);
 126         }
 127         else {
 128                 /* else we got the REAL string, so check the return code */
 129
 130                 time (&end_time);
 131
 132                 result = STATE_OK;
 133
 134                 status_line = (char *) strtok (buffer, "\n");
 135
 136                 if (strstr (status_line, "200"))
 137                         result = STATE_OK;
 138
 139                 /* client errors result in a warning state */
 140                 else if (strstr (status_line, "400"))
 141                         result = STATE_WARNING;
 142                 else if (strstr (status_line, "401"))
 143                         result = STATE_WARNING;
 144                 else if (strstr (status_line, "402"))
 145                         result = STATE_WARNING;
 146                 else if (strstr (status_line, "403"))
 147                         result = STATE_WARNING;
 148                 else if (strstr (status_line, "404"))
 149                         result = STATE_WARNING;
 150
 151                 /* server errors result in a critical state */
 152                 else if (strstr (status_line, "500"))
 153                         result = STATE_CRITICAL;
 154                 else if (strstr (status_line, "501"))
 155                         result = STATE_CRITICAL;
 156                 else if (strstr (status_line, "502"))
 157                         result = STATE_CRITICAL;
 158                 else if (strstr (status_line, "503"))
 159                         result = STATE_CRITICAL;
 160
 161                 else
 162                         result = STATE_UNKNOWN;
 163         }
 164
 165         /* Part II - Check stream exists and is ok */
 166         if ((result == STATE_OK )&& (server_url != NULL) ) {
 167
 168                 /* Part I - Server Check */
 169
 170                 /* send the OPTIONS request */
 171                 sprintf (buffer, "DESCRIBE rtsp://%s:%d%s RTSP/1.0\n", host_name,
 172                                                  server_port, server_url);
 173                 result = send (sd, buffer, strlen (buffer), 0);
 174
 175                 /* send the header sync */
 176                 sprintf (buffer, "CSeq: 2\n");
 177                 result = send (sd, buffer, strlen (buffer), 0);
 178
 179                 /* send a newline so the server knows we're done with the request */
 180                 sprintf (buffer, "\n");
 181                 result = send (sd, buffer, strlen (buffer), 0);
 182
 183                 /* watch for the REAL connection string */
 184                 result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
 185
 186                 /* return a CRITICAL status if we couldn't read any data */
 187                 if (result == -1) {
 188                         printf (_("No data received from host\n"));
 189                         result = STATE_CRITICAL;
 190                 }
 191                 else {
 192                         /* make sure we find the response we are looking for */
 193                         if (!strstr (buffer, server_expect)) {
 194                                 if (server_port == PORT)
 195                                         printf ("%s\n", _("Invalid REAL response received from host"));
 196                                 else
 197                                         printf (_("Invalid REAL response received from host on port %d\n"),
 198                                                                         server_port);
 199                         }
 200                         else {
 201
 202                                 /* else we got the REAL string, so check the return code */
 203
 204                                 time (&end_time);
 205
 206                                 result = STATE_OK;
 207
 208                                 status_line = (char *) strtok (buffer, "\n");
 209
 210                                 if (strstr (status_line, "200"))
 211                                         result = STATE_OK;
 212
 213                                 /* client errors result in a warning state */
 214                                 else if (strstr (status_line, "400"))
 215                                         result = STATE_WARNING;
 216                                 else if (strstr (status_line, "401"))
 217                                         result = STATE_WARNING;
 218                                 else if (strstr (status_line, "402"))
 219                                         result = STATE_WARNING;
 220                                 else if (strstr (status_line, "403"))
 221                                         result = STATE_WARNING;
 222                                 else if (strstr (status_line, "404"))
 223                                         result = STATE_WARNING;
 224
 225                                 /* server errors result in a critical state */
 226                                 else if (strstr (status_line, "500"))
 227                                         result = STATE_CRITICAL;
 228                                 else if (strstr (status_line, "501"))
 229                                         result = STATE_CRITICAL;
 230                                 else if (strstr (status_line, "502"))
 231                                         result = STATE_CRITICAL;
 232                                 else if (strstr (status_line, "503"))
 233                                         result = STATE_CRITICAL;
 234
 235                                 else
 236                                         result = STATE_UNKNOWN;
 237                         }
 238                 }
 239         }
 240
 241         /* Return results */
 242         if (result == STATE_OK) {
 243
 244                 if (check_critical_time == TRUE
 245                                 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
 246                 else if (check_warning_time == TRUE
 247                                                  && (end_time - start_time) > warning_time) result =
 248                                 STATE_WARNING;
 249
 250                 /* Put some HTML in here to create a dynamic link */
 251                 printf (_("REAL %s - %d second response time\n"),
 252                                                 state_text (result),
 253                                                 (int) (end_time - start_time));
 254         }
 255         else
 256                 printf ("%s\n", status_line);
 257
 258         /* close the connection */
 259         close (sd);
 260
 261         /* reset the alarm */
 262         alarm (0);
 263
 264         return result;
 265 }
 266
 267
 268
 269 /* process command-line arguments */
 270 int
 271 process_arguments (int argc, char **argv)
 272 {
 273         int c;
 274
 275         int option = 0;
 276         static struct option longopts[] = {
 277                 {"hostname", required_argument, 0, 'H'},
 278                 {"IPaddress", required_argument, 0, 'I'},
 279                 {"expect", required_argument, 0, 'e'},
 280                 {"url", required_argument, 0, 'u'},
 281                 {"port", required_argument, 0, 'p'},
 282                 {"critical", required_argument, 0, 'c'},
 283                 {"warning", required_argument, 0, 'w'},
 284                 {"timeout", required_argument, 0, 't'},
 285                 {"verbose", no_argument, 0, 'v'},
 286                 {"version", no_argument, 0, 'V'},
 287                 {"help", no_argument, 0, 'h'},
 288                 {0, 0, 0, 0}
 289         };
 290
 291         if (argc < 2)
 292                 return ERROR;
 293
 294         for (c = 1; c < argc; c++) {
 295                 if (strcmp ("-to", argv[c]) == 0)
 296                         strcpy (argv[c], "-t");
 297                 else if (strcmp ("-wt", argv[c]) == 0)
 298                         strcpy (argv[c], "-w");
 299                 else if (strcmp ("-ct", argv[c]) == 0)
 300                         strcpy (argv[c], "-c");
 301         }
 302
 303         while (1) {
 304                 c = getopt_long (argc, argv, "+hvVI:H:e:u:p:w:c:t:", longopts,
 305                                                                          &option);
 306
 307                 if (c == -1 || c == EOF)
 308                         break;
 309
 310                 switch (c) {
 311                 case 'I':                                                                       /* hostname */
 312                 case 'H':                                                                       /* hostname */
 313                         if (server_address)
 314                                 break;
 315                         else if (is_host (optarg))
 316                                 server_address = optarg;
 317                         else
 318                                 usage2 (_("Invalid hostname/address"), optarg);
 319                         break;
 320                 case 'e':                                                                       /* string to expect in response header */
 321                         server_expect = optarg;
 322                         break;
 323                 case 'u':                                                                       /* server URL */
 324                         server_url = optarg;
 325                         break;
 326                 case 'p':                                                                       /* port */
 327                         if (is_intpos (optarg)) {
 328                                 server_port = atoi (optarg);
 329                         }
 330                         else {
 331                                 usage4 (_("Port must be a positive integer"));
 332                         }
 333                         break;
 334                 case 'w':                                                                       /* warning time threshold */
 335                         if (is_intnonneg (optarg)) {
 336                                 warning_time = atoi (optarg);
 337                                 check_warning_time = TRUE;
 338                         }
 339                         else {
 340                                 usage4 (_("Warning time must be a positive integer"));
 341                         }
 342                         break;
 343                 case 'c':                                                                       /* critical time threshold */
 344                         if (is_intnonneg (optarg)) {
 345                                 critical_time = atoi (optarg);
 346                                 check_critical_time = TRUE;
 347                         }
 348                         else {
 349                                 usage4 (_("Critical time must be a positive integer"));
 350                         }
 351                         break;
 352                 case 'v':                                                                       /* verbose */
 353                         verbose = TRUE;
 354                         break;
 355                 case 't':                                                                       /* timeout */
 356                         if (is_intnonneg (optarg)) {
 357                                 socket_timeout = atoi (optarg);
 358                         }
 359                         else {
 360                                 usage4 (_("Timeout interval must be a positive integer"));
 361                         }
 362                         break;
 363                 case 'V':                                                                       /* version */
 364                         print_revision (progname, revision);
 365                         exit (STATE_OK);
 366                 case 'h':                                                                       /* help */
 367                         print_help ();
 368                         exit (STATE_OK);
 369                 case '?':                                                                       /* usage */
 370                         usage5 ();
 371                 }
 372         }
 373
 374         c = optind;
 375         if (server_address==NULL && argc>c) {
 376                 if (is_host (argv[c])) {
 377                         server_address = argv[c++];
 378                 }
 379                 else {
 380                         usage2 (_("Invalid hostname/address"), argv[c]);
 381                 }
 382         }
 383
 384         if (server_address==NULL)
 385                 usage4 (_("You must provide a server to check"));
 386
 387         if (host_name==NULL)
 388                 host_name = strdup (server_address);
 389
 390         if (server_expect == NULL)
 391                 server_expect = strdup(EXPECT);
 392
 393         return validate_arguments ();
 394 }
 395
 396
 397
 398 int
 399 validate_arguments (void)
 400 {
 401         return OK;
 402 }
 403
 404
 405
 406 void
 407 print_help (void)
 408 {
 409         char *myport;
 410         asprintf (&myport, "%d", PORT);
 411
 412         print_revision (progname, revision);
 413
 414         printf ("Copyright (c) 1999 Pedro Leite <leite@cic.ua.pt>\n");
 415         printf (COPYRIGHT, copyright, email);
 416
 417         printf ("%s\n", _("This plugin tests the REAL service on the specified host."));
 418
 419   printf ("\n\n");
 420
 421         print_usage ();
 422
 423         printf (_(UT_HELP_VRSN));
 424         printf (_(UT_EXTRA_OPTS));
 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 ("\n");
 441         printf ("%s\n", _("This plugin will attempt to open an RTSP connection with the host."));
 442   printf ("%s\n", _("Successul connects return STATE_OK, refusals and timeouts return"));
 443   printf ("%s\n", _("STATE_CRITICAL, other errors return STATE_UNKNOWN.  Successful connects,"));
 444   printf ("%s\n", _("but incorrect reponse messages from the host result in STATE_WARNING return"));
 445   printf ("%s\n", _("values."));
 446
 447 #ifdef NP_EXTRA_OPTS
 448   printf ("\n");
 449   printf ("%s\n", _("Notes:"));
 450   printf (_(UT_EXTRA_OPTS_NOTES));
 451 #endif
 452
 453         printf (_(UT_SUPPORT));
 454 }
 455
 456
 457
 458 void
 459 print_usage (void)
 460 {
 461   printf (_("Usage:"));
 462         printf ("%s -H host [-e expect] [-p port] [-w warn] [-c crit] [-t timeout] [-v]\n", progname);
 463 }