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  $Id$
  18
  19 ******************************************************************************/
  20
  21 const char *progname = "check_real";
  22 const char *revision = "$Revision$";
  23 const char *copyright = "2000-2003";
  24 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  25
  26 #include "common.h"
  27 #include "netutils.h"
  28 #include "utils.h"
  29
  30 enum {
  31         PORT    = 554
  32 };
  33
  34 #define EXPECT  "RTSP/1."
  35 #define URL     ""
  36
  37 int process_arguments (int, char **);
  38 int validate_arguments (void);
  39 void print_help (void);
  40 void print_usage (void);
  41
  42 int server_port = PORT;
  43 char *server_address;
  44 char *host_name;
  45 char *server_url = NULL;
  46 char *server_expect;
  47 int warning_time = 0;
  48 int check_warning_time = FALSE;
  49 int critical_time = 0;
  50 int check_critical_time = FALSE;
  51 int verbose = FALSE;
  52
  53
  54
  55 int
  56 main (int argc, char **argv)
  57 {
  58         int sd;
  59         int result;
  60         char buffer[MAX_INPUT_BUFFER];
  61         char *status_line = NULL;
  62
  63         setlocale (LC_ALL, "");
  64         bindtextdomain (PACKAGE, LOCALEDIR);
  65         textdomain (PACKAGE);
  66
  67         if (process_arguments (argc, argv) != OK)
  68                 usage (_("check_real: could not parse arguments\n"));
  69
  70         /* initialize alarm signal handling */
  71         signal (SIGALRM, socket_timeout_alarm_handler);
  72
  73         /* set socket timeout */
  74         alarm (socket_timeout);
  75         time (&start_time);
  76
  77         /* try to connect to the host at the given port number */
  78         if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
  79                 die (STATE_CRITICAL, _("Unable to connect to %s on port %d\n"),
  80                                                          server_address, server_port);
  81
  82         /* Part I - Server Check */
  83
  84         /* send the OPTIONS request */
  85         sprintf (buffer, "OPTIONS rtsp://%s:%d RTSP/1.0\r\n", host_name, server_port);
  86         result = send (sd, buffer, strlen (buffer), 0);
  87
  88         /* send the header sync */
  89         sprintf (buffer, "CSeq: 1\r\n");
  90         result = send (sd, buffer, strlen (buffer), 0);
  91
  92         /* send a newline so the server knows we're done with the request */
  93         sprintf (buffer, "\r\n");
  94         result = send (sd, buffer, strlen (buffer), 0);
  95
  96         /* watch for the REAL connection string */
  97         result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
  98
  99         /* return a CRITICAL status if we couldn't read any data */
 100         if (result == -1)
 101                 die (STATE_CRITICAL, _("No data received from %s\n"), host_name);
 102
 103         /* make sure we find the response we are looking for */
 104         if (!strstr (buffer, server_expect)) {
 105                 if (server_port == PORT)
 106                         printf (_("Invalid REAL response received from host\n"));
 107                 else
 108                         printf (_("Invalid REAL response received from host on port %d\n"),
 109                                                         server_port);
 110         }
 111         else {
 112                 /* else we got the REAL string, so check the return code */
 113
 114                 time (&end_time);
 115
 116                 result = STATE_OK;
 117
 118                 status_line = (char *) strtok (buffer, "\n");
 119
 120                 if (strstr (status_line, "200"))
 121                         result = STATE_OK;
 122
 123                 /* client errors result in a warning state */
 124                 else if (strstr (status_line, "400"))
 125                         result = STATE_WARNING;
 126                 else if (strstr (status_line, "401"))
 127                         result = STATE_WARNING;
 128                 else if (strstr (status_line, "402"))
 129                         result = STATE_WARNING;
 130                 else if (strstr (status_line, "403"))
 131                         result = STATE_WARNING;
 132                 else if (strstr (status_line, "404"))
 133                         result = STATE_WARNING;
 134
 135                 /* server errors result in a critical state */
 136                 else if (strstr (status_line, "500"))
 137                         result = STATE_CRITICAL;
 138                 else if (strstr (status_line, "501"))
 139                         result = STATE_CRITICAL;
 140                 else if (strstr (status_line, "502"))
 141                         result = STATE_CRITICAL;
 142                 else if (strstr (status_line, "503"))
 143                         result = STATE_CRITICAL;
 144
 145                 else
 146                         result = STATE_UNKNOWN;
 147         }
 148
 149         /* Part II - Check stream exists and is ok */
 150         if ((result == STATE_OK )&& (server_url != NULL) ) {
 151
 152                 /* Part I - Server Check */
 153
 154                 /* send the OPTIONS request */
 155                 sprintf (buffer, "DESCRIBE rtsp://%s:%d%s RTSP/1.0\n", host_name,
 156                                                  server_port, server_url);
 157                 result = send (sd, buffer, strlen (buffer), 0);
 158
 159                 /* send the header sync */
 160                 sprintf (buffer, "CSeq: 2\n");
 161                 result = send (sd, buffer, strlen (buffer), 0);
 162
 163                 /* send a newline so the server knows we're done with the request */
 164                 sprintf (buffer, "\n");
 165                 result = send (sd, buffer, strlen (buffer), 0);
 166
 167                 /* watch for the REAL connection string */
 168                 result = recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0);
 169
 170                 /* return a CRITICAL status if we couldn't read any data */
 171                 if (result == -1) {
 172                         printf (_("No data received from host\n"));
 173                         result = STATE_CRITICAL;
 174                 }
 175                 else {
 176                         /* make sure we find the response we are looking for */
 177                         if (!strstr (buffer, server_expect)) {
 178                                 if (server_port == PORT)
 179                                         printf (_("Invalid REAL response received from host\n"));
 180                                 else
 181                                         printf (_("Invalid REAL response received from host on port %d\n"),
 182                                                                         server_port);
 183                         }
 184                         else {
 185
 186                                 /* else we got the REAL string, so check the return code */
 187
 188                                 time (&end_time);
 189
 190                                 result = STATE_OK;
 191
 192                                 status_line = (char *) strtok (buffer, "\n");
 193
 194                                 if (strstr (status_line, "200"))
 195                                         result = STATE_OK;
 196
 197                                 /* client errors result in a warning state */
 198                                 else if (strstr (status_line, "400"))
 199                                         result = STATE_WARNING;
 200                                 else if (strstr (status_line, "401"))
 201                                         result = STATE_WARNING;
 202                                 else if (strstr (status_line, "402"))
 203                                         result = STATE_WARNING;
 204                                 else if (strstr (status_line, "403"))
 205                                         result = STATE_WARNING;
 206                                 else if (strstr (status_line, "404"))
 207                                         result = STATE_WARNING;
 208
 209                                 /* server errors result in a critical state */
 210                                 else if (strstr (status_line, "500"))
 211                                         result = STATE_CRITICAL;
 212                                 else if (strstr (status_line, "501"))
 213                                         result = STATE_CRITICAL;
 214                                 else if (strstr (status_line, "502"))
 215                                         result = STATE_CRITICAL;
 216                                 else if (strstr (status_line, "503"))
 217                                         result = STATE_CRITICAL;
 218
 219                                 else
 220                                         result = STATE_UNKNOWN;
 221                         }
 222                 }
 223         }
 224
 225         /* Return results */
 226         if (result == STATE_OK) {
 227
 228                 if (check_critical_time == TRUE
 229                                 && (end_time - start_time) > critical_time) result = STATE_CRITICAL;
 230                 else if (check_warning_time == TRUE
 231                                                  && (end_time - start_time) > warning_time) result =
 232                                 STATE_WARNING;
 233
 234                 /* Put some HTML in here to create a dynamic link */
 235                 printf (_("REAL %s - %d second response time\n"),
 236                                                 state_text (result),
 237                                                 (int) (end_time - start_time));
 238         }
 239         else
 240                 printf ("%s\n", status_line);
 241
 242         /* close the connection */
 243         close (sd);
 244
 245         /* reset the alarm */
 246         alarm (0);
 247
 248         return result;
 249 }
 250
 251
 252
 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                                 usage2 (_("Invalid hostname/address"), optarg);
 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 (_("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 positive 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                         printf (_("%s: Unknown argument: %s\n\n"), progname, optarg);
 355                         print_usage ();
 356                         exit (STATE_UNKNOWN);
 357                 }
 358         }
 359
 360         c = optind;
 361         if (server_address==NULL && argc>c) {
 362                 if (is_host (argv[c])) {
 363                         server_address = argv[c++];
 364                 }
 365                 else {
 366                         usage2 (_("Invalid hostname/address"), argv[c]);
 367                 }
 368         }
 369
 370         if (server_address==NULL)
 371                 usage (_("You must provide a server to check\n"));
 372
 373         if (host_name==NULL)
 374                 host_name = strdup (server_address);
 375
 376         if (server_expect == NULL)
 377                 server_expect = strdup(EXPECT);
 378
 379         return validate_arguments ();
 380 }
 381
 382
 383
 384 int
 385 validate_arguments (void)
 386 {
 387         return OK;
 388 }
 389
 390
 391
 392 void
 393 print_help (void)
 394 {
 395         char *myport;
 396         asprintf (&myport, "%d", PORT);
 397
 398         print_revision (progname, revision);
 399
 400         printf ("Copyright (c) 1999 Pedro Leite <leite@cic.ua.pt>\n");
 401         printf (COPYRIGHT, copyright, email);
 402
 403         printf (_("This plugin tests the REAL service on the specified host.\n\n"));
 404
 405         print_usage ();
 406
 407         printf (_(UT_HELP_VRSN));
 408
 409         printf (_(UT_HOST_PORT), 'p', myport);
 410
 411         printf (_("\
 412  -u, --url=STRING\n\
 413    Connect to this url\n\
 414  -e, --expect=STRING\n\
 415    String to expect in first line of server response (default: %s)\n"),
 416                EXPECT);
 417
 418         printf (_(UT_WARN_CRIT));
 419
 420         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 421
 422         printf (_(UT_VERBOSE));
 423
 424         printf(_("\
 425 This plugin will attempt to open an RTSP connection with the host.\n\
 426 Successul connects return STATE_OK, refusals and timeouts return\n\
 427 STATE_CRITICAL, other errors return STATE_UNKNOWN.  Successful connects,\n\
 428 but incorrect reponse messages from the host result in STATE_WARNING return\n\
 429 values."));
 430
 431         printf (_(UT_SUPPORT));
 432 }
 433
 434
 435
 436 void
 437 print_usage (void)
 438 {
 439         printf ("\
 440 Usage: %s -H host [-e expect] [-p port] [-w warn] [-c crit]\n\
 441   [-t timeout] [-v]\n", progname);
 442         printf (_(UT_HLP_VRS), progname, progname);
 443 }