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