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