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