plugins/check_tcp.c

   1 /*****************************************************************************
   2 *
   3 * Nagios check_tcp plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 1999-2008 Nagios Plugins Development Team
   7 *
   8 * Description:
   9 *
  10 * This file contains the check_tcp plugin
  11 *
  12 *
  13 * This program is free software: you can redistribute it and/or modify
  14 * it under the terms of the GNU General Public License as published by
  15 * the Free Software Foundation, either version 3 of the License, or
  16 * (at your option) any later version.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * You should have received a copy of the GNU General Public License
  24 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25 *
  26 * $Id$
  27 *
  28 *****************************************************************************/
  29
  30 /* progname "check_tcp" changes depending on symlink called */
  31 char *progname;
  32 const char *copyright = "1999-2008";
  33 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  34
  35 #include "common.h"
  36 #include "netutils.h"
  37 #include "utils.h"
  38 #include "utils_tcp.h"
  39
  40 #ifdef HAVE_SSL
  41 static int check_cert = FALSE;
  42 static int days_till_exp;
  43 # define my_recv(buf, len) ((flags & FLAG_SSL) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
  44 # define my_send(buf, len) ((flags & FLAG_SSL) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
  45 #else
  46 # define my_recv(buf, len) read(sd, buf, len)
  47 # define my_send(buf, len) send(sd, buf, len, 0)
  48 #endif
  49
  50 /* int my_recv(char *, size_t); */
  51 static int process_arguments (int, char **);
  52 void print_help (void);
  53 void print_usage (void);
  54
  55 #define EXPECT server_expect[0]
  56 static char *SERVICE = "TCP";
  57 static char *SEND = NULL;
  58 static char *QUIT = NULL;
  59 static int PROTOCOL = IPPROTO_TCP; /* most common is default */
  60 static int PORT = 0;
  61
  62 static int server_port = 0;
  63 static char *server_address = NULL;
  64 static char *server_send = NULL;
  65 static char *server_quit = NULL;
  66 static char **server_expect;
  67 static size_t server_expect_count = 0;
  68 static size_t maxbytes = 0;
  69 static char **warn_codes = NULL;
  70 static size_t warn_codes_count = 0;
  71 static char **crit_codes = NULL;
  72 static size_t crit_codes_count = 0;
  73 static unsigned int delay = 0;
  74 static double warning_time = 0;
  75 static double critical_time = 0;
  76 static double elapsed_time = 0;
  77 static long microsec;
  78 static int sd = 0;
  79 #define MAXBUF 1024
  80 static char buffer[MAXBUF];
  81 static int expect_mismatch_state = STATE_WARNING;
  82
  83 #define FLAG_SSL 0x01
  84 #define FLAG_VERBOSE 0x02
  85 #define FLAG_EXACT_MATCH 0x04
  86 #define FLAG_TIME_WARN 0x08
  87 #define FLAG_TIME_CRIT 0x10
  88 #define FLAG_HIDE_OUTPUT 0x20
  89 #define FLAG_MATCH_ALL 0x40
  90 static size_t flags = FLAG_EXACT_MATCH;
  91
  92 int
  93 main (int argc, char **argv)
  94 {
  95         int result = STATE_UNKNOWN;
  96         int i;
  97         char *status = NULL;
  98         struct timeval tv;
  99         size_t len;
 100         int match = -1;
 101
 102         setlocale (LC_ALL, "");
 103         bindtextdomain (PACKAGE, LOCALEDIR);
 104         textdomain (PACKAGE);
 105
 106         /* determine program- and service-name quickly */
 107         progname = strrchr(argv[0], '/');
 108         if(progname != NULL) progname++;
 109         else progname = argv[0];
 110
 111         len = strlen(progname);
 112         if(len > 6 && !memcmp(progname, "check_", 6)) {
 113                 SERVICE = strdup(progname + 6);
 114                 for(i = 0; i < len - 6; i++)
 115                         SERVICE[i] = toupper(SERVICE[i]);
 116         }
 117
 118         /* set up a resonable buffer at first (will be realloc()'ed if
 119          * user specifies other options) */
 120         server_expect = calloc(sizeof(char *), 2);
 121
 122         /* determine defaults for this service's protocol */
 123         if (!strncmp(SERVICE, "UDP", 3)) {
 124                 PROTOCOL = IPPROTO_UDP;
 125         }
 126         else if (!strncmp(SERVICE, "FTP", 3)) {
 127                 EXPECT = "220";
 128                 QUIT = "QUIT\r\n";
 129                 PORT = 21;
 130         }
 131         else if (!strncmp(SERVICE, "POP", 3) || !strncmp(SERVICE, "POP3", 4)) {
 132                 EXPECT = "+OK";
 133                 QUIT = "QUIT\r\n";
 134                 PORT = 110;
 135         }
 136         else if (!strncmp(SERVICE, "SMTP", 4)) {
 137                 EXPECT = "220";
 138                 QUIT = "QUIT\r\n";
 139                 PORT = 25;
 140         }
 141         else if (!strncmp(SERVICE, "IMAP", 4)) {
 142                 EXPECT = "* OK";
 143                 QUIT = "a1 LOGOUT\r\n";
 144                 PORT = 143;
 145         }
 146 #ifdef HAVE_SSL
 147         else if (!strncmp(SERVICE, "SIMAP", 5)) {
 148                 EXPECT = "* OK";
 149                 QUIT = "a1 LOGOUT\r\n";
 150                 flags |= FLAG_SSL;
 151                 PORT = 993;
 152         }
 153         else if (!strncmp(SERVICE, "SPOP", 4)) {
 154                 EXPECT = "+OK";
 155                 QUIT = "QUIT\r\n";
 156                 flags |= FLAG_SSL;
 157                 PORT = 995;
 158         }
 159         else if (!strncmp(SERVICE, "SSMTP", 5)) {
 160                 EXPECT = "220";
 161                 QUIT = "QUIT\r\n";
 162                 flags |= FLAG_SSL;
 163                 PORT = 465;
 164         }
 165         else if (!strncmp(SERVICE, "JABBER", 6)) {
 166                 SEND = "<stream:stream to=\'host\' xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'>\n";
 167                 EXPECT = "<?xml version=\'1.0\'?><stream:stream xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'";
 168                 QUIT = "</stream:stream>\n";
 169                 flags |= FLAG_HIDE_OUTPUT;
 170                 PORT = 5222;
 171         }
 172         else if (!strncmp (SERVICE, "NNTPS", 5)) {
 173                 server_expect_count = 2;
 174                 server_expect[0] = "200";
 175                 server_expect[1] = "201";
 176                 QUIT = "QUIT\r\n";
 177                 flags |= FLAG_SSL;
 178                 PORT = 563;
 179         }
 180 #endif
 181         else if (!strncmp (SERVICE, "NNTP", 4)) {
 182                 server_expect_count = 2;
 183                 server_expect = malloc(sizeof(char *) * server_expect_count);
 184                 server_expect[0] = strdup("200");
 185                 server_expect[1] = strdup("201");
 186                 QUIT = "QUIT\r\n";
 187                 PORT = 119;
 188         }
 189         else if (!strncmp(SERVICE, "CLAMD", 5)) {
 190                 SEND = "PING";
 191                 EXPECT = "PONG";
 192                 QUIT = NULL;
 193                 PORT = 3310;
 194         }
 195         /* fallthrough check, so it's supposed to use reverse matching */
 196         else if (strcmp (SERVICE, "TCP"))
 197                 usage (_("CRITICAL - Generic check_tcp called with unknown service\n"));
 198
 199         server_address = "127.0.0.1";
 200         server_port = PORT;
 201         server_send = SEND;
 202         server_quit = QUIT;
 203         status = NULL;
 204
 205         /* Parse extra opts if any */
 206         argv=np_extra_opts (&argc, argv, progname);
 207
 208         if (process_arguments (argc, argv) == ERROR)
 209                 usage4 (_("Could not parse arguments"));
 210
 211         if(flags & FLAG_VERBOSE) {
 212                 printf("Using service %s\n", SERVICE);
 213                 printf("Port: %d\n", server_port);
 214                 printf("flags: 0x%x\n", (int)flags);
 215         }
 216
 217         if(EXPECT && !server_expect_count)
 218                 server_expect_count++;
 219
 220         if(PROTOCOL==IPPROTO_UDP && !(server_expect_count && server_send)){
 221                 usage(_("With UDP checks, a send/expect string must be specified."));
 222         }
 223
 224         /* set up the timer */
 225         signal (SIGALRM, socket_timeout_alarm_handler);
 226         alarm (socket_timeout);
 227
 228         /* try to connect to the host at the given port number */
 229         gettimeofday (&tv, NULL);
 230
 231         result = np_net_connect (server_address, server_port, &sd, PROTOCOL);
 232         if (result == STATE_CRITICAL) return STATE_CRITICAL;
 233
 234 #ifdef HAVE_SSL
 235         if (flags & FLAG_SSL){
 236                 result = np_net_ssl_init(sd);
 237                 if (result == STATE_OK && check_cert == TRUE) {
 238                         result = np_net_ssl_check_cert(days_till_exp);
 239                         if(result != STATE_OK) {
 240                                 printf(_("CRITICAL - Cannot retrieve server certificate.\n"));
 241                         }
 242                 }
 243         }
 244         if(result != STATE_OK){
 245                 np_net_ssl_cleanup();
 246                 if(sd) close(sd);
 247                 return result;
 248         }
 249 #endif /* HAVE_SSL */
 250
 251         if (server_send != NULL) {              /* Something to send? */
 252                 my_send(server_send, strlen(server_send));
 253         }
 254
 255         if (delay > 0) {
 256                 tv.tv_sec += delay;
 257                 sleep (delay);
 258         }
 259
 260         if(flags & FLAG_VERBOSE) {
 261                 if (server_send) {
 262                         printf("Send string: %s\n", server_send);
 263                 }
 264                 if (server_quit) {
 265                         printf("Quit string: %s\n", server_quit);
 266                 }
 267                 printf("server_expect_count: %d\n", (int)server_expect_count);
 268                 for(i = 0; i < server_expect_count; i++)
 269                         printf("\t%d: %s\n", i, server_expect[i]);
 270         }
 271
 272         /* if(len) later on, we know we have a non-NULL response */
 273         len = 0;
 274         if (server_expect_count) {
 275
 276                 /* watch for the expect string */
 277                 while ((i = my_recv(buffer, sizeof(buffer))) > 0) {
 278                         status = realloc(status, len + i + 1);
 279                         memcpy(&status[len], buffer, i);
 280                         len += i;
 281
 282                         /* stop reading if user-forced or data-starved */
 283                         if(i < sizeof(buffer) || (maxbytes && len >= maxbytes))
 284                                 break;
 285
 286                         if (maxbytes && len >= maxbytes)
 287                                 break;
 288                 }
 289
 290                 /* no data when expected, so return critical */
 291                 if (len == 0)
 292                         die (STATE_CRITICAL, _("No data received from host\n"));
 293
 294                 /* force null-termination and strip whitespace from end of output */
 295                 status[len--] = '\0';
 296                 /* print raw output if we're debugging */
 297                 if(flags & FLAG_VERBOSE)
 298                         printf("received %d bytes from host\n#-raw-recv-------#\n%s\n#-raw-recv-------#\n",
 299                                (int)len + 1, status);
 300                 while(isspace(status[len])) status[len--] = '\0';
 301
 302                 match = np_expect_match(status,
 303                                 server_expect,
 304                                 server_expect_count,
 305                                 (flags & FLAG_MATCH_ALL ? TRUE : FALSE),
 306                                 (flags & FLAG_EXACT_MATCH ? TRUE : FALSE),
 307                                 (flags & FLAG_VERBOSE ? TRUE : FALSE));
 308         }
 309
 310         if (server_quit != NULL) {
 311                 my_send(server_quit, strlen(server_quit));
 312         }
 313 #ifdef HAVE_SSL
 314         np_net_ssl_cleanup();
 315 #endif
 316         if (sd) close (sd);
 317
 318         microsec = deltime (tv);
 319         elapsed_time = (double)microsec / 1.0e6;
 320
 321         if (flags & FLAG_TIME_CRIT && elapsed_time > critical_time)
 322                 result = STATE_CRITICAL;
 323         else if (flags & FLAG_TIME_WARN && elapsed_time > warning_time)
 324                 result = STATE_WARNING;
 325
 326         /* did we get the response we hoped? */
 327         if(match == FALSE && result != STATE_CRITICAL)
 328                 result = expect_mismatch_state;
 329
 330         /* reset the alarm */
 331         alarm (0);
 332
 333         /* this is a bit stupid, because we don't want to print the
 334          * response time (which can look ok to the user) if we didn't get
 335          * the response we were looking for. if-else */
 336         printf("%s %s - ", SERVICE, state_text(result));
 337
 338         if(match == FALSE && len && !(flags & FLAG_HIDE_OUTPUT))
 339                 printf("Unexpected response from host/socket: %s", status);
 340         else {
 341                 if(match == FALSE)
 342                         printf("Unexpected response from host/socket on ");
 343                 else
 344                         printf("%.3f second response time on ", elapsed_time);
 345                 if(server_address[0] != '/')
 346                         printf("port %d", server_port);
 347                 else
 348                         printf("socket %s", server_address);
 349         }
 350
 351         if (match != FALSE && !(flags & FLAG_HIDE_OUTPUT) && len)
 352                 printf (" [%s]", status);
 353
 354         /* perf-data doesn't apply when server doesn't talk properly,
 355          * so print all zeroes on warn and crit. Use fperfdata since
 356          * localisation settings can make different outputs */
 357         if(match == FALSE)
 358                 printf ("|%s",
 359                                 fperfdata ("time", elapsed_time, "s",
 360                                 (flags & FLAG_TIME_WARN ? TRUE : FALSE), 0,
 361                                 (flags & FLAG_TIME_CRIT ? TRUE : FALSE), 0,
 362                                 TRUE, 0,
 363                                 TRUE, socket_timeout)
 364                         );
 365         else
 366                 printf("|%s",
 367                                 fperfdata ("time", elapsed_time, "s",
 368                                 (flags & FLAG_TIME_WARN ? TRUE : FALSE), warning_time,
 369                                 (flags & FLAG_TIME_CRIT ? TRUE : FALSE), critical_time,
 370                                 TRUE, 0,
 371                                 TRUE, socket_timeout)
 372                         );
 373
 374         putchar('\n');
 375         return result;
 376 }
 377
 378
 379
 380 /* process command-line arguments */
 381 static int
 382 process_arguments (int argc, char **argv)
 383 {
 384         int c;
 385         int escape = 0;
 386
 387         int option = 0;
 388         static struct option longopts[] = {
 389                 {"hostname", required_argument, 0, 'H'},
 390                 {"critical", required_argument, 0, 'c'},
 391                 {"warning", required_argument, 0, 'w'},
 392                 {"critical-codes", required_argument, 0, 'C'},
 393                 {"warning-codes", required_argument, 0, 'W'},
 394                 {"timeout", required_argument, 0, 't'},
 395                 {"protocol", required_argument, 0, 'P'}, /* FIXME: Unhandled */
 396                 {"port", required_argument, 0, 'p'},
 397                 {"escape", no_argument, 0, 'E'},
 398                 {"all", no_argument, 0, 'A'},
 399                 {"send", required_argument, 0, 's'},
 400                 {"expect", required_argument, 0, 'e'},
 401                 {"maxbytes", required_argument, 0, 'm'},
 402                 {"quit", required_argument, 0, 'q'},
 403                 {"jail", no_argument, 0, 'j'},
 404                 {"delay", required_argument, 0, 'd'},
 405                 {"refuse", required_argument, 0, 'r'},
 406                 {"mismatch", required_argument, 0, 'M'},
 407                 {"use-ipv4", no_argument, 0, '4'},
 408                 {"use-ipv6", no_argument, 0, '6'},
 409                 {"verbose", no_argument, 0, 'v'},
 410                 {"version", no_argument, 0, 'V'},
 411                 {"help", no_argument, 0, 'h'},
 412                 {"ssl", no_argument, 0, 'S'},
 413                 {"certificate", required_argument, 0, 'D'},
 414                 {0, 0, 0, 0}
 415         };
 416
 417         if (argc < 2)
 418                 usage4 (_("No arguments found"));
 419
 420         /* backwards compatibility */
 421         for (c = 1; c < argc; c++) {
 422                 if (strcmp ("-to", argv[c]) == 0)
 423                         strcpy (argv[c], "-t");
 424                 else if (strcmp ("-wt", argv[c]) == 0)
 425                         strcpy (argv[c], "-w");
 426                 else if (strcmp ("-ct", argv[c]) == 0)
 427                         strcpy (argv[c], "-c");
 428         }
 429
 430         if (!is_option (argv[1])) {
 431                 server_address = argv[1];
 432                 argv[1] = argv[0];
 433                 argv = &argv[1];
 434                 argc--;
 435         }
 436
 437         while (1) {
 438                 c = getopt_long (argc, argv, "+hVv46EAH:s:e:q:m:c:w:t:p:C:W:d:Sr:jD:M:",
 439                                  longopts, &option);
 440
 441                 if (c == -1 || c == EOF || c == 1)
 442                         break;
 443
 444                 switch (c) {
 445                 case '?':                 /* print short usage statement if args not parsable */
 446                         usage5 ();
 447                 case 'h':                 /* help */
 448                         print_help ();
 449                         exit (STATE_OK);
 450                 case 'V':                 /* version */
 451                         print_revision (progname, NP_VERSION);
 452                         exit (STATE_OK);
 453                 case 'v':                 /* verbose mode */
 454                         flags |= FLAG_VERBOSE;
 455                         break;
 456                 case '4':
 457                         address_family = AF_INET;
 458                         break;
 459                 case '6':
 460 #ifdef USE_IPV6
 461                         address_family = AF_INET6;
 462 #else
 463                         usage4 (_("IPv6 support not available"));
 464 #endif
 465                         break;
 466                 case 'H':                 /* hostname */
 467                         server_address = optarg;
 468                         break;
 469                 case 'c':                 /* critical */
 470                         critical_time = strtod (optarg, NULL);
 471                         flags |= FLAG_TIME_CRIT;
 472                         break;
 473                 case 'j':                 /* hide output */
 474                         flags |= FLAG_HIDE_OUTPUT;
 475                         break;
 476                 case 'w':                 /* warning */
 477                         warning_time = strtod (optarg, NULL);
 478                         flags |= FLAG_TIME_WARN;
 479                         break;
 480                 case 'C':
 481                         crit_codes = realloc (crit_codes, ++crit_codes_count);
 482                         crit_codes[crit_codes_count - 1] = optarg;
 483                         break;
 484                 case 'W':
 485                         warn_codes = realloc (warn_codes, ++warn_codes_count);
 486                         warn_codes[warn_codes_count - 1] = optarg;
 487                         break;
 488                 case 't':                 /* timeout */
 489                         if (!is_intpos (optarg))
 490                                 usage4 (_("Timeout interval must be a positive integer"));
 491                         else
 492                                 socket_timeout = atoi (optarg);
 493                         break;
 494                 case 'p':                 /* port */
 495                         if (!is_intpos (optarg))
 496                                 usage4 (_("Port must be a positive integer"));
 497                         else
 498                                 server_port = atoi (optarg);
 499                         break;
 500                 case 'E':
 501                         escape = 1;
 502                         break;
 503                 case 's':
 504                         if (escape)
 505                                 server_send = np_escaped_string(optarg);
 506                         else
 507                                 asprintf(&server_send, "%s", optarg);
 508                         break;
 509                 case 'e': /* expect string (may be repeated) */
 510                         flags &= ~FLAG_EXACT_MATCH;
 511                         if (server_expect_count == 0)
 512                                 server_expect = malloc (sizeof (char *) * (++server_expect_count));
 513                         else
 514                                 server_expect = realloc (server_expect, sizeof (char *) * (++server_expect_count));
 515                         server_expect[server_expect_count - 1] = optarg;
 516                         break;
 517                 case 'm':
 518                         if (!is_intpos (optarg))
 519                                 usage4 (_("Maxbytes must be a positive integer"));
 520                         else
 521                                 maxbytes = strtol (optarg, NULL, 0);
 522                         break;
 523                 case 'q':
 524                         if (escape)
 525                                 server_quit = np_escaped_string(optarg);
 526                         else
 527                                 asprintf(&server_quit, "%s\r\n", optarg);
 528                         break;
 529                 case 'r':
 530                         if (!strncmp(optarg,"ok",2))
 531                                 econn_refuse_state = STATE_OK;
 532                         else if (!strncmp(optarg,"warn",4))
 533                                 econn_refuse_state = STATE_WARNING;
 534                         else if (!strncmp(optarg,"crit",4))
 535                                 econn_refuse_state = STATE_CRITICAL;
 536                         else
 537                                 usage4 (_("Refuse must be one of ok, warn, crit"));
 538                         break;
 539                 case 'M':
 540                         if (!strncmp(optarg,"ok",2))
 541                                 expect_mismatch_state = STATE_OK;
 542                         else if (!strncmp(optarg,"warn",4))
 543                                 expect_mismatch_state = STATE_WARNING;
 544                         else if (!strncmp(optarg,"crit",4))
 545                                 expect_mismatch_state = STATE_CRITICAL;
 546                         else
 547                                 usage4 (_("Mismatch must be one of ok, warn, crit"));
 548                         break;
 549                 case 'd':
 550                         if (is_intpos (optarg))
 551                                 delay = atoi (optarg);
 552                         else
 553                                 usage4 (_("Delay must be a positive integer"));
 554                         break;
 555                 case 'D': /* Check SSL cert validity - days 'til certificate expiration */
 556 #ifdef HAVE_SSL
 557 #  ifdef USE_OPENSSL /* XXX */
 558                         if (!is_intnonneg (optarg))
 559                                 usage2 (_("Invalid certificate expiration period"), optarg);
 560                         days_till_exp = atoi (optarg);
 561                         check_cert = TRUE;
 562                         flags |= FLAG_SSL;
 563                         break;
 564 #  endif /* USE_OPENSSL */
 565 #endif
 566                         /* fallthrough if we don't have ssl */
 567                 case 'S':
 568 #ifdef HAVE_SSL
 569                         flags |= FLAG_SSL;
 570 #else
 571                         die (STATE_UNKNOWN, _("Invalid option - SSL is not available"));
 572 #endif
 573                         break;
 574                 case 'A':
 575                         flags |= FLAG_MATCH_ALL;
 576                         break;
 577                 }
 578         }
 579
 580         if (server_address == NULL)
 581                 usage4 (_("You must provide a server address"));
 582         else if (server_address[0] != '/' && is_host (server_address) == FALSE)
 583                 die (STATE_CRITICAL, "%s %s - %s: %s\n", SERVICE, state_text(STATE_CRITICAL), _("Invalid hostname, address or socket"), server_address);
 584
 585         return TRUE;
 586 }
 587
 588
 589 void
 590 print_help (void)
 591 {
 592         print_revision (progname, NP_VERSION);
 593
 594         printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 595         printf (COPYRIGHT, copyright, email);
 596
 597         printf (_("This plugin tests %s connections with the specified host (or unix socket).\n\n"),
 598                 SERVICE);
 599
 600         print_usage ();
 601
 602         printf (UT_HELP_VRSN);
 603         printf (UT_EXTRA_OPTS);
 604
 605         printf (UT_HOST_PORT, 'p', "none");
 606
 607         printf (UT_IPv46);
 608
 609         printf (" %s\n", "-E, --escape");
 610   printf ("    %s\n", _("Can use \\n, \\r, \\t or \\ in send or quit string. Must come before send or quit option"));
 611   printf ("    %s\n", _("Default: nothing added to send, \\r\\n added to end of quit"));
 612   printf (" %s\n", "-s, --send=STRING");
 613   printf ("    %s\n", _("String to send to the server"));
 614   printf (" %s\n", "-e, --expect=STRING");
 615   printf ("    %s %s\n", _("String to expect in server response"), _("(may be repeated)"));
 616   printf (" %s\n", "-A, --all");
 617   printf ("    %s\n", _("All expect strings need to occur in server response. Default is any"));
 618   printf (" %s\n", "-q, --quit=STRING");
 619   printf ("    %s\n", _("String to send server to initiate a clean close of the connection"));
 620   printf (" %s\n", "-r, --refuse=ok|warn|crit");
 621   printf ("    %s\n", _("Accept TCP refusals with states ok, warn, crit (default: crit)"));
 622   printf (" %s\n", "-M, --mismatch=ok|warn|crit");
 623   printf ("    %s\n", _("Accept expected string mismatches with states ok, warn, crit (default: warn)"));
 624   printf (" %s\n", "-j, --jail");
 625   printf ("    %s\n", _("Hide output from TCP socket"));
 626   printf (" %s\n", "-m, --maxbytes=INTEGER");
 627   printf ("    %s\n", _("Close connection once more than this number of bytes are received"));
 628   printf (" %s\n", "-d, --delay=INTEGER");
 629   printf ("    %s\n", _("Seconds to wait between sending string and polling for response"));
 630
 631 #ifdef HAVE_SSL
 632         printf (" %s\n", "-D, --certificate=INTEGER");
 633   printf ("    %s\n", _("Minimum number of days a certificate has to be valid."));
 634   printf (" %s\n", "-S, --ssl");
 635   printf ("    %s\n", _("Use SSL for the connection."));
 636 #endif
 637
 638         printf (UT_WARN_CRIT);
 639
 640         printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
 641
 642         printf (UT_VERBOSE);
 643
 644         printf (UT_SUPPORT);
 645 }
 646
 647
 648 void
 649 print_usage (void)
 650 {
 651         printf ("%s\n", _("Usage:"));
 652   printf ("%s -H host -p port [-w <warning time>] [-c <critical time>] [-s <send string>]\n",progname);
 653   printf ("[-e <expect string>] [-q <quit string>][-m <maximum bytes>] [-d <delay>]\n");
 654   printf ("[-t <timeout seconds>] [-r <refuse state>] [-M <mismatch state>] [-v] [-4|-6] [-j]\n");
 655   printf ("[-D <days to cert expiry>] [-S <use SSL>] [-E]\n");
 656 }
 657