plugins/check_real.c

   1 /******************************************************************************
   2
   3  This program is free software; you can redistribute it and/or modify
   4  it under the terms of the GNU General Public License as published by
   5  the Free Software Foundation; either version 2 of the License, or
   6  (at your option) any later version.
   7
   8  This program is distributed in the hope that it will be useful,
   9  but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  GNU General Public License for more details.
  12
  13  You should have received a copy of the GNU General Public License
  14  along with this program; if not, write to the Free Software
  15  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  16
  17 ******************************************************************************/
  18
  19 const char *progname = "check_real";
  20 const char *revision = "$Revision$";
  21 const char *copyright = "2000-2003";
  22 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  23
  24 #include "common.h"
  25 #include "netutils.h"
  26 #include "utils.h"
  27
  28 enum {
  29         PORT    = 554
  30 };
  31
  32 #define EXPECT  "RTSP/1."
  33 #define URL     ""
  34
  35 int process_arguments (int, char **);
  36 int validate_arguments (void);
  37 void print_help (void);
  38 void print_usage (void);
  39
  40 int server_port = PORT;
  41 char *server_address;
  42 char *host_name;
  43 char *server_url = NULL;
  44 char *server_expect;
  45 int warning_time = 0;
  46 int check_warning_time = FALSE;
  47 int critical_time = 0;
  48 int check_critical_time = FALSE;
  49 int verbose = FALSE;
  50
  51
  52
  53
  54
  55 \f
  56 int
  57 main (int argc, char **argv)
  58 {
  59         int sd;
  60         int result;
  61         char buffer[MAX_INPUT_BUFFER];
  62         char *status_line = NULL;
  63
  64         setlocale (LC_ALL, "");
  65         bindtextdomain (PACKAGE, LOCALEDIR);
  66         textdomain (PACKAGE);
  67
  68         if (process_arguments (argc, argv) != OK)
  69                 usage (_("Invalid command arguments supplied\n"));
  70
  71         /* initialize alarm signal handling */
  72         signal (SIGALRM, socket_timeout_alarm_handler);
  73
  74         /* set socket timeout */
  75         alarm (socket_timeout);
  76         time (&start_time);
  77
  78         /* try to connect to the host at the given port number */
  79         if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
  80                 die (STATE_CRITICAL, _("Unable to connect to %s on port %d\n"),
  81                                                          server_address, server_port);
  82
  83         /* Part I - Server Check */
  84
  85         /* send the OPTIONS request */
  86         sprintf (buffer, "OPTIONS rtsp://%s:%d RTSP/1.0\r\n", host_name, server_port);
  87         result = send (sd, buffer, strlen (buffer), 0);
  88
  89         /* send the header sync */
  90         sprintf (buffer, "CSeq: 1\r\n");
  91         result = send (sd, buffer, strlen (buffer), 0);
  92
  93         /* send a newline so the server knows we're done with the request */
  94         sprintf (buffer, "\r\n");
  95         result = send (sd, buffer, strlen (buffer), 0);
  96
  97         /* watch for the REAL connection string */
  98         result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
  99
 100         /* return a CRITICAL status if we couldn't read any data */
 101         if (result == -1)
 102                 die (STATE_CRITICAL, _("No data received from %s\n"), host_name);
 103
 104         /* make sure we find the response we are looking for */
 105         if (!strstr (buffer, server_expect)) {
 106                 if (server_port == PORT)
 107                         printf (_("Invalid REAL response received from host\n"));
 108                 else
 109                         printf (_("Invalid REAL response received from host on port %d\n"),
 110                                                         server_port);
 111         }
 112         else {
 113                 /* else we got the REAL string, so check the return code */
 114
 115                 time (&end_time);
 116
 117                 result = STATE_OK;
 118
 119                 status_line = (char *) strtok (buffer, "\n");
 120
 121                 if (strstr (status_line, "200"))
 122                         result = STATE_OK;
 123
 124                 /* client errors result in a warning state */
 125                 else if (strstr (status_line, "400"))
 126                         result = STATE_WARNING;
 127                 else if (strstr (status_line, "401"))
 128                         result = STATE_WARNING;
 129                 else if (strstr (status_line, "402"))
 130                         result = STATE_WARNING;
 131                 else if (strstr (status_line, "403"))
 132                         result = STATE_WARNING;
 133                 else if (strstr (status_line, "404"))
 134                         result = STATE_WARNING;
 135
 136                 /* server errors result in a critical state */
 137                 else if (strstr (status_line, "500"))
 138                         result = STATE_CRITICAL;
 139                 else if (strstr (status_line, "501"))
 140                         result = STATE_CRITICAL;
 141                 else if (strstr (status_line, "502"))
 142                         result = STATE_CRITICAL;
 143                 else if (strstr (status_line, "503"))
 144                         result = STATE_CRITICAL;
 145
 146                 else
 147                         result = STATE_UNKNOWN;
 148         }
 149
 150         /* Part II - Check stream exists and is ok */
 151         if ((result == STATE_OK )&& (server_url != NULL) ) {
 152
 153                 /* Part I - Server Check */
 154
 155                 /* send the OPTIONS request */
 156                 sprintf (buffer, "DESCRIBE rtsp://%s:%d%s RTSP/1.0\n", host_name,
 157                                                  server_port, server_url);
 158                 result = send (sd, buffer, strlen (buffer), 0);
 159
 160                 /* send the header sync */
 161                 sprintf (buffer, "CSeq: 2\n");
 162                 result = send (sd, buffer, strlen (buffer), 0);
 163
 164                 /* send a newline so the server knows we're done with the request */
 165                 sprintf (buffer, "\n");
 166                 result = send (sd, buffer, strlen (buffer), 0);
 167
 168                 /* watch for the REAL connection string */
 169                 result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
 170
 171                 /* return a CRITICAL status if we couldn't read any data */
 172                 if (result == -1) {
 173                         printf (_("No data received from host\n"));
 174                         result = STATE_CRITICAL;
 175                 }
 176                 else {
 177                         /* make sure we find the response we are looking for */
 178                         if (!strstr (buffer, server_expect)) {
 179                                 if (server_port == PORT)
 180                                         printf (_("Invalid REAL response received from host\n"));
 181                                 else
 182                                         printf (_("Invalid REAL response received from host on port %d\n"),
 183                                                                         server_port);
 184                         }
 185                         else {
 186
 187                                 /* else we got the REAL string, so check the return code */
 188
 189                                 time (&end_time);
 190
 191                                 result = STATE_OK;
 192
 193                                 status_line = (char *) strtok (buffer, "\n");
 194
 195                                 if (strstr (status_line, "200"))
 196                                         result = STATE_OK;
 197
 198                                 /* client errors result in a warning state */
 199                                 else if (strstr (status_line, "400"))
 200                                         result = STATE_WARNING;
 201                                 else if (strstr (status_line, "401"))
 202                                         result = STATE_WARNING;
 203                                 else if (strstr (status_line, "402"))
 204                                         result = STATE_WARNING;
 205                                 else if (strstr (status_line, "403"))
 206                                         result = STATE_WARNING;
 207                                 else if (strstr (status_line, "404"))
 208                                         result = STATE_WARNING;
 209
 210                                 /* server errors result in a critical state */
 211                                 else if (strstr (status_line, "500"))
 212                                         result = STATE_CRITICAL;
 213                                 else if (strstr (status_line, "501"))
 214                                         result = STATE_CRITICAL;
 215                                 else if (strstr (status_line, "502"))
 216                                         result = STATE_CRITICAL;
 217                                 else if (strstr (status_line, "503"))
 218                                         result = STATE_CRITICAL;
 219
 220                                 else
 221                                         result = STATE_UNKNOWN;
 222                         }
 223                 }
 224         }
 225
 226         /* Return results */
 227         if (result == STATE_OK) {
 228
 229                 if (check_critical_time == TRUE
 230                                 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
 231                 else if (check_warning_time == TRUE
 232                                                  && (end_time - start_time) > warning_time) result =
 233                                 STATE_WARNING;
 234
 235                 /* Put some HTML in here to create a dynamic link */
 236                 printf (_("REAL %s - %d second response time\n"),
 237                                                 state_text (result),
 238                                                 (int) (end_time - start_time));
 239         }
 240         else
 241                 printf ("%s\n", status_line);
 242
 243         /* close the connection */
 244         close (sd);
 245
 246         /* reset the alarm */
 247         alarm (0);
 248
 249         return result;
 250 }
 251
 252
 253
 254
 255
 256 \f
 257 /* process command-line arguments */
 258 int
 259 process_arguments (int argc, char **argv)
 260 {
 261         int c;
 262
 263         int option = 0;
 264         static struct option longopts[] = {
 265                 {"hostname", required_argument, 0, 'H'},
 266                 {"IPaddress", required_argument, 0, 'I'},
 267                 {"expect", required_argument, 0, 'e'},
 268                 {"url", required_argument, 0, 'u'},
 269                 {"port", required_argument, 0, 'p'},
 270                 {"critical", required_argument, 0, 'c'},
 271                 {"warning", required_argument, 0, 'w'},
 272                 {"timeout", required_argument, 0, 't'},
 273                 {"verbose", no_argument, 0, 'v'},
 274                 {"version", no_argument, 0, 'V'},
 275                 {"help", no_argument, 0, 'h'},
 276                 {0, 0, 0, 0}
 277         };
 278
 279         if (argc < 2)
 280                 return ERROR;
 281
 282         for (c = 1; c < argc; c++) {
 283                 if (strcmp ("-to", argv[c]) == 0)
 284                         strcpy (argv[c], "-t");
 285                 else if (strcmp ("-wt", argv[c]) == 0)
 286                         strcpy (argv[c], "-w");
 287                 else if (strcmp ("-ct", argv[c]) == 0)
 288                         strcpy (argv[c], "-c");
 289         }
 290
 291         while (1) {
 292                 c = getopt_long (argc, argv, "+hVI:H:e:u:p:w:c:t:", longopts,
 293                                                                          &option);
 294
 295                 if (c == -1 || c == EOF)
 296                         break;
 297
 298                 switch (c) {
 299                 case 'I':                                                                       /* hostname */
 300                 case 'H':                                                                       /* hostname */
 301                         if (server_address)
 302                                 break;
 303                         else if (is_host (optarg))
 304                                 server_address = optarg;
 305                         else
 306                                 usage (_("Invalid host name\n"));
 307                         break;
 308                 case 'e':                                                                       /* string to expect in response header */
 309                         server_expect = optarg;
 310                         break;
 311                 case 'u':                                                                       /* server URL */
 312                         server_url = optarg;
 313                         break;
 314                 case 'p':                                                                       /* port */
 315                         if (is_intpos (optarg)) {
 316                                 server_port = atoi (optarg);
 317                         }
 318                         else {
 319                                 usage (_("Server port must be a positive integer\n"));
 320                         }
 321                         break;
 322                 case 'w':                                                                       /* warning time threshold */
 323                         if (is_intnonneg (optarg)) {
 324                                 warning_time = atoi (optarg);
 325                                 check_warning_time = TRUE;
 326                         }
 327                         else {
 328                                 usage (_("Warning time must be a nonnegative integer\n"));
 329                         }
 330                         break;
 331                 case 'c':                                                                       /* critical time threshold */
 332                         if (is_intnonneg (optarg)) {
 333                                 critical_time = atoi (optarg);
 334                                 check_critical_time = TRUE;
 335                         }
 336                         else {
 337                                 usage (_("Critical time must be a nonnegative integer\n"));
 338                         }
 339                         break;
 340                 case 'v':                                                                       /* verbose */
 341                         verbose = TRUE;
 342                         break;
 343                 case 't':                                                                       /* timeout */
 344                         if (is_intnonneg (optarg)) {
 345                                 socket_timeout = atoi (optarg);
 346                         }
 347                         else {
 348                                 usage (_("Time interval must be a nonnegative integer\n"));
 349                         }
 350                         break;
 351                 case 'V':                                                                       /* version */
 352                         print_revision (progname, "$Revision$");
 353                         exit (STATE_OK);
 354                 case 'h':                                                                       /* help */
 355                         print_help ();
 356                         exit (STATE_OK);
 357                 case '?':                                                                       /* usage */
 358                         usage (_("Invalid argument\n"));
 359                 }
 360         }
 361
 362         c = optind;
 363         if (server_address==NULL && argc>c) {
 364                 if (is_host (argv[c])) {
 365                         server_address = argv[c++];
 366                 }
 367                 else {
 368                         usage (_("Invalid host name"));
 369                 }
 370         }
 371
 372         if (server_address==NULL)
 373                 usage (_("You must provide a server to check\n"));
 374
 375         if (host_name==NULL)
 376                 host_name = strdup (server_address);
 377
 378         if (server_expect == NULL)
 379                 server_expect = strdup(EXPECT);
 380
 381         return validate_arguments ();
 382 }
 383
 384
 385
 386
 387
 388 int
 389 validate_arguments (void)
 390 {
 391         return OK;
 392 }
 393
 394
 395
 396
 397 \f
 398 void
 399 print_help (void)
 400 {
 401         char *myport;
 402         asprintf (&myport, "%d", PORT);
 403
 404         print_revision (progname, "$Revision$");
 405
 406         printf (_("Copyright (c) 1999 Pedro Leite <leite@cic.ua.pt>\n"));
 407         printf (_(COPYRIGHT), copyright, email);
 408
 409         printf (_("This plugin tests the REAL service on the specified host.\n\n"));
 410
 411         print_usage ();
 412
 413         printf (_(UT_HELP_VRSN));
 414
 415         printf (_(UT_HOST_PORT), 'p', myport);
 416
 417         printf (_("\
 418  -u, --url=STRING\n\
 419    Connect to this url\n\
 420  -e, --expect=STRING\n\
 421    String to expect in first line of server response (default: %s)\n"),
 422                EXPECT);
 423
 424         printf (_(UT_WARN_CRIT));
 425
 426         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 427
 428         printf (_(UT_VERBOSE));
 429
 430         printf(_("\
 431 This plugin will attempt to open an RTSP connection with the host.\n\
 432 Successul connects return STATE_OK, refusals and timeouts return\n\
 433 STATE_CRITICAL, other errors return STATE_UNKNOWN.  Successful connects,\n\
 434 but incorrect reponse messages from the host result in STATE_WARNING return\n\
 435 values."));
 436
 437         printf (_(UT_SUPPORT));
 438 }
 439
 440
 441
 442
 443
 444 void
 445 print_usage (void)
 446 {
 447         printf ("\
 448 Usage: %s -H host [-e expect] [-p port] [-w warn] [-c crit]\n\
 449   [-t timeout] [-v]\n", progname);
 450         printf (_(UT_HLP_VRS), progname, progname);
 451 }