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 * Last Modified: $Date$
   9 *
  10 * Description:
  11 *
  12 * This file contains the check_tcp plugin
  13 *
  14 *
  15 * This program is free software: you can redistribute it and/or modify
  16 * it under the terms of the GNU General Public License as published by
  17 * the Free Software Foundation, either version 3 of the License, or
  18 * (at your option) any later version.
  19 *
  20 * This program is distributed in the hope that it will be useful,
  21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 * GNU General Public License for more details.
  24 *
  25 * You should have received a copy of the GNU General Public License
  26 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  27 *
  28 * $Id$
  29 *
  30 *****************************************************************************/
  31
  32 /* progname "check_tcp" changes depending on symlink called */
  33 char *progname;
  34 const char *revision = "$Revision$";
  35 const char *copyright = "1999-2008";
  36 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  37
  38 #include "common.h"
  39 #include "netutils.h"
  40 #include "utils.h"
  41 #include "utils_tcp.h"
  42
  43 #ifdef HAVE_SSL
  44 static int check_cert = FALSE;
  45 static int days_till_exp;
  46 # define my_recv(buf, len) ((flags & FLAG_SSL) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
  47 # define my_send(buf, len) ((flags & FLAG_SSL) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
  48 #else
  49 # define my_recv(buf, len) read(sd, buf, len)
  50 # define my_send(buf, len) send(sd, buf, len, 0)
  51 #endif
  52
  53 /* int my_recv(char *, size_t); */
  54 static int process_arguments (int, char **);
  55 void print_help (void);
  56 void print_usage (void);
  57
  58 #define EXPECT server_expect[0]
  59 static char *SERVICE = "TCP";
  60 static char *SEND = NULL;
  61 static char *QUIT = NULL;
  62 static int PROTOCOL = IPPROTO_TCP; /* most common is default */
  63 static int PORT = 0;
  64
  65 static int server_port = 0;
  66 static char *server_address = NULL;
  67 static char *server_send = NULL;
  68 static char *server_quit = NULL;
  69 static char **server_expect;
  70 static size_t server_expect_count = 0;
  71 static size_t maxbytes = 0;
  72 static char **warn_codes = NULL;
  73 static size_t warn_codes_count = 0;
  74 static char **crit_codes = NULL;
  75 static size_t crit_codes_count = 0;
  76 static unsigned int delay = 0;
  77 static double warning_time = 0;
  78 static double critical_time = 0;
  79 static double elapsed_time = 0;
  80 static long microsec;
  81 static int sd = 0;
  82 #define MAXBUF 1024
  83 static char buffer[MAXBUF];
  84 static int expect_mismatch_state = STATE_WARNING;
  85
  86 #define FLAG_SSL 0x01
  87 #define FLAG_VERBOSE 0x02
  88 #define FLAG_EXACT_MATCH 0x04
  89 #define FLAG_TIME_WARN 0x08
  90 #define FLAG_TIME_CRIT 0x10
  91 #define FLAG_HIDE_OUTPUT 0x20
  92 #define FLAG_MATCH_ALL 0x40
  93 static size_t flags = FLAG_EXACT_MATCH;
  94
  95 int
  96 main (int argc, char **argv)
  97 {
  98         int result = STATE_UNKNOWN;
  99         int i;
 100         char *status = NULL;
 101         struct timeval tv;
 102         size_t len;
 103         int match = -1;
 104
 105         setlocale (LC_ALL, "");
 106         bindtextdomain (PACKAGE, LOCALEDIR);
 107         textdomain (PACKAGE);
 108
 109         /* determine program- and service-name quickly */
 110         progname = strrchr(argv[0], '/');
 111         if(progname != NULL) progname++;
 112         else progname = argv[0];
 113
 114         len = strlen(progname);
 115         if(len > 6 && !memcmp(progname, "check_", 6)) {
 116                 SERVICE = strdup(progname + 6);
 117                 for(i = 0; i < len - 6; i++)
 118                         SERVICE[i] = toupper(SERVICE[i]);
 119         }
 120
 121         /* set up a resonable buffer at first (will be realloc()'ed if
 122          * user specifies other options) */
 123         server_expect = calloc(sizeof(char *), 2);
 124
 125         /* determine defaults for this service's protocol */
 126         if (!strncmp(SERVICE, "UDP", 3)) {
 127                 PROTOCOL = IPPROTO_UDP;
 128         }
 129         else if (!strncmp(SERVICE, "FTP", 3)) {
 130                 EXPECT = "220";
 131                 QUIT = "QUIT\r\n";
 132                 PORT = 21;
 133         }
 134         else if (!strncmp(SERVICE, "POP", 3) || !strncmp(SERVICE, "POP3", 4)) {
 135                 EXPECT = "+OK";
 136                 QUIT = "QUIT\r\n";
 137                 PORT = 110;
 138         }
 139         else if (!strncmp(SERVICE, "SMTP", 4)) {
 140                 EXPECT = "220";
 141                 QUIT = "QUIT\r\n";
 142                 PORT = 25;
 143         }
 144         else if (!strncmp(SERVICE, "IMAP", 4)) {
 145                 EXPECT = "* OK";
 146                 QUIT = "a1 LOGOUT\r\n";
 147                 PORT = 143;
 148         }
 149 #ifdef HAVE_SSL
 150         else if (!strncmp(SERVICE, "SIMAP", 5)) {
 151                 EXPECT = "* OK";
 152                 QUIT = "a1 LOGOUT\r\n";
 153                 flags |= FLAG_SSL;
 154                 PORT = 993;
 155         }
 156         else if (!strncmp(SERVICE, "SPOP", 4)) {
 157                 EXPECT = "+OK";
 158                 QUIT = "QUIT\r\n";
 159                 flags |= FLAG_SSL;
 160                 PORT = 995;
 161         }
 162         else if (!strncmp(SERVICE, "SSMTP", 5)) {
 163                 EXPECT = "220";
 164                 QUIT = "QUIT\r\n";
 165                 flags |= FLAG_SSL;
 166                 PORT = 465;
 167         }
 168         else if (!strncmp(SERVICE, "JABBER", 6)) {
 169                 SEND = "<stream:stream to=\'host\' xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'>\n";
 170                 EXPECT = "<?xml version=\'1.0\'?><stream:stream xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'";
 171                 QUIT = "</stream:stream>\n";
 172                 flags |= FLAG_HIDE_OUTPUT;
 173                 PORT = 5222;
 174         }
 175         else if (!strncmp (SERVICE, "NNTPS", 5)) {
 176                 server_expect_count = 2;
 177                 server_expect[0] = "200";
 178                 server_expect[1] = "201";
 179                 QUIT = "QUIT\r\n";
 180                 flags |= FLAG_SSL;
 181                 PORT = 563;
 182         }
 183 #endif
 184         else if (!strncmp (SERVICE, "NNTP", 4)) {
 185                 server_expect_count = 2;
 186                 server_expect = malloc(sizeof(char *) * server_expect_count);
 187                 server_expect[0] = strdup("200");
 188                 server_expect[1] = strdup("201");
 189                 QUIT = "QUIT\r\n";
 190                 PORT = 119;
 191         }
 192         else if (!strncmp(SERVICE, "CLAMD", 5)) {
 193                 SEND = "PING";
 194                 EXPECT = "PONG";
 195                 QUIT = NULL;
 196                 PORT = 3310;
 197         }
 198         /* fallthrough check, so it's supposed to use reverse matching */
 199         else if (strcmp (SERVICE, "TCP"))
 200                 usage (_("CRITICAL - Generic check_tcp called with unknown service\n"));
 201
 202         server_address = "127.0.0.1";
 203         server_port = PORT;
 204         server_send = SEND;
 205         server_quit = QUIT;
 206         status = NULL;
 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'},
 396                 {"port", required_argument, 0, 'p'},
 397                 {"escape", required_argument, 0, 'E'},
 398                 {"all", required_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 #ifdef HAVE_SSL
 413                 {"ssl", no_argument, 0, 'S'},
 414                 {"certificate", required_argument, 0, 'D'},
 415 #endif
 416                 {0, 0, 0, 0}
 417         };
 418
 419         if (argc < 2)
 420                 usage4 (_("No arguments found"));
 421
 422         /* backwards compatibility */
 423         for (c = 1; c < argc; c++) {
 424                 if (strcmp ("-to", argv[c]) == 0)
 425                         strcpy (argv[c], "-t");
 426                 else if (strcmp ("-wt", argv[c]) == 0)
 427                         strcpy (argv[c], "-w");
 428                 else if (strcmp ("-ct", argv[c]) == 0)
 429                         strcpy (argv[c], "-c");
 430         }
 431
 432         if (!is_option (argv[1])) {
 433                 server_address = argv[1];
 434                 argv[1] = argv[0];
 435                 argv = &argv[1];
 436                 argc--;
 437         }
 438
 439         while (1) {
 440                 c = getopt_long (argc, argv, "+hVv46EAH:s:e:q:m:c:w:t:p:C:W:d:Sr:jD:M:",
 441                                  longopts, &option);
 442
 443                 if (c == -1 || c == EOF || c == 1)
 444                         break;
 445
 446                 switch (c) {
 447                 case '?':                 /* print short usage statement if args not parsable */
 448                         usage5 ();
 449                 case 'h':                 /* help */
 450                         print_help ();
 451                         exit (STATE_OK);
 452                 case 'V':                 /* version */
 453                         print_revision (progname, revision);
 454                         exit (STATE_OK);
 455                 case 'v':                 /* verbose mode */
 456                         flags |= FLAG_VERBOSE;
 457                         break;
 458                 case '4':
 459                         address_family = AF_INET;
 460                         break;
 461                 case '6':
 462 #ifdef USE_IPV6
 463                         address_family = AF_INET6;
 464 #else
 465                         usage4 (_("IPv6 support not available"));
 466 #endif
 467                         break;
 468                 case 'H':                 /* hostname */
 469                         server_address = optarg;
 470                         break;
 471                 case 'c':                 /* critical */
 472                         critical_time = strtod (optarg, NULL);
 473                         flags |= FLAG_TIME_CRIT;
 474                         break;
 475                 case 'j':                 /* hide output */
 476                         flags |= FLAG_HIDE_OUTPUT;
 477                         break;
 478                 case 'w':                 /* warning */
 479                         warning_time = strtod (optarg, NULL);
 480                         flags |= FLAG_TIME_WARN;
 481                         break;
 482                 case 'C':
 483                         crit_codes = realloc (crit_codes, ++crit_codes_count);
 484                         crit_codes[crit_codes_count - 1] = optarg;
 485                         break;
 486                 case 'W':
 487                         warn_codes = realloc (warn_codes, ++warn_codes_count);
 488                         warn_codes[warn_codes_count - 1] = optarg;
 489                         break;
 490                 case 't':                 /* timeout */
 491                         if (!is_intpos (optarg))
 492                                 usage4 (_("Timeout interval must be a positive integer"));
 493                         else
 494                                 socket_timeout = atoi (optarg);
 495                         break;
 496                 case 'p':                 /* port */
 497                         if (!is_intpos (optarg))
 498                                 usage4 (_("Port must be a positive integer"));
 499                         else
 500                                 server_port = atoi (optarg);
 501                         break;
 502                 case 'E':
 503                         escape = 1;
 504                         break;
 505                 case 's':
 506                         if (escape)
 507                                 server_send = np_escaped_string(optarg);
 508                         else
 509                                 asprintf(&server_send, "%s", optarg);
 510                         break;
 511                 case 'e': /* expect string (may be repeated) */
 512                         flags &= ~FLAG_EXACT_MATCH;
 513                         if (server_expect_count == 0)
 514                                 server_expect = malloc (sizeof (char *) * (++server_expect_count));
 515                         else
 516                                 server_expect = realloc (server_expect, sizeof (char *) * (++server_expect_count));
 517                         server_expect[server_expect_count - 1] = optarg;
 518                         break;
 519                 case 'm':
 520                         if (!is_intpos (optarg))
 521                                 usage4 (_("Maxbytes must be a positive integer"));
 522                         else
 523                                 maxbytes = strtol (optarg, NULL, 0);
 524                         break;
 525                 case 'q':
 526                         if (escape)
 527                                 server_quit = np_escaped_string(optarg);
 528                         else
 529                                 asprintf(&server_quit, "%s\r\n", optarg);
 530                         break;
 531                 case 'r':
 532                         if (!strncmp(optarg,"ok",2))
 533                                 econn_refuse_state = STATE_OK;
 534                         else if (!strncmp(optarg,"warn",4))
 535                                 econn_refuse_state = STATE_WARNING;
 536                         else if (!strncmp(optarg,"crit",4))
 537                                 econn_refuse_state = STATE_CRITICAL;
 538                         else
 539                                 usage4 (_("Refuse must be one of ok, warn, crit"));
 540                         break;
 541                 case 'M':
 542                         if (!strncmp(optarg,"ok",2))
 543                                 expect_mismatch_state = STATE_OK;
 544                         else if (!strncmp(optarg,"warn",4))
 545                                 expect_mismatch_state = STATE_WARNING;
 546                         else if (!strncmp(optarg,"crit",4))
 547                                 expect_mismatch_state = STATE_CRITICAL;
 548                         else
 549                                 usage4 (_("Mismatch must be one of ok, warn, crit"));
 550                         break;
 551                 case 'd':
 552                         if (is_intpos (optarg))
 553                                 delay = atoi (optarg);
 554                         else
 555                                 usage4 (_("Delay must be a positive integer"));
 556                         break;
 557                 case 'D': /* Check SSL cert validity - days 'til certificate expiration */
 558 #ifdef HAVE_SSL
 559 #  ifdef USE_OPENSSL /* XXX */
 560                         if (!is_intnonneg (optarg))
 561                                 usage2 (_("Invalid certificate expiration period"), optarg);
 562                         days_till_exp = atoi (optarg);
 563                         check_cert = TRUE;
 564                         flags |= FLAG_SSL;
 565                         break;
 566 #  endif /* USE_OPENSSL */
 567 #endif
 568                         /* fallthrough if we don't have ssl */
 569                 case 'S':
 570 #ifdef HAVE_SSL
 571                         flags |= FLAG_SSL;
 572 #else
 573                         die (STATE_UNKNOWN, _("Invalid option - SSL is not available"));
 574 #endif
 575                         break;
 576                 case 'A':
 577                         flags |= FLAG_MATCH_ALL;
 578                         break;
 579                 }
 580         }
 581
 582         if (server_address == NULL)
 583                 usage4 (_("You must provide a server address"));
 584         else if (server_address[0] != '/' && is_host (server_address) == FALSE)
 585                 die (STATE_CRITICAL, "%s %s - %s: %s\n", SERVICE, state_text(STATE_CRITICAL), _("Invalid hostname, address or socket"), server_address);
 586
 587         return TRUE;
 588 }
 589
 590
 591 void
 592 print_help (void)
 593 {
 594         print_revision (progname, revision);
 595
 596         printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 597         printf (COPYRIGHT, copyright, email);
 598
 599         printf (_("This plugin tests %s connections with the specified host (or unix socket).\n\n"),
 600                 SERVICE);
 601
 602         print_usage ();
 603
 604         printf (_(UT_HELP_VRSN));
 605
 606         printf (_(UT_HOST_PORT), 'p', "none");
 607
 608         printf (_(UT_IPv46));
 609
 610         printf (" %s\n", "-E, --escape");
 611   printf ("    %s\n", _("Can use \\n, \\r, \\t or \\ in send or quit string. Must come before send or quit option"));
 612   printf ("    %s\n", _("Default: nothing added to send, \\r\\n added to end of quit"));
 613   printf (" %s\n", "-s, --send=STRING");
 614   printf ("    %s\n", _("String to send to the server"));
 615   printf (" %s\n", "-e, --expect=STRING");
 616   printf ("    %s %s\n", _("String to expect in server response"), _("(may be repeated)"));
 617   printf (" %s\n", "-A, --all");
 618   printf ("    %s\n", _("All expect strings need to occur in server response. Default is any"));
 619   printf (" %s\n", "-q, --quit=STRING");
 620   printf ("    %s\n", _("String to send server to initiate a clean close of the connection"));
 621   printf (" %s\n", "-r, --refuse=ok|warn|crit");
 622   printf ("    %s\n", _("Accept tcp refusals with states ok, warn, crit (default: crit)"));
 623   printf (" %s\n", "-M, --mismatch=ok|warn|crit");
 624   printf ("    %s\n", _("Accept expected string mismatches with states ok, warn, crit (default: warn)"));
 625   printf (" %s\n", "-j, --jail");
 626   printf ("    %s\n", _("Hide output from TCP socket"));
 627   printf (" %s\n", "-m, --maxbytes=INTEGER");
 628   printf ("    %s\n", _("Close connection once more than this number of bytes are received"));
 629   printf (" %s\n", "-d, --delay=INTEGER");
 630   printf ("    %s\n", _("Seconds to wait between sending string and polling for response"));
 631
 632 #ifdef HAVE_SSL
 633         printf (" %s\n", "-D, --certificate=INTEGER");
 634   printf ("    %s\n", _("Minimum number of days a certificate has to be valid."));
 635   printf (" %s\n", "-S, --ssl");
 636   printf ("    %s\n", _("Use SSL for the connection."));
 637 #endif
 638
 639         printf (_(UT_WARN_CRIT));
 640
 641         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 642
 643         printf (_(UT_VERBOSE));
 644
 645         printf (_(UT_SUPPORT));
 646 }
 647
 648
 649 void
 650 print_usage (void)
 651 {
 652         printf (_("Usage:"));
 653   printf ("%s -H host -p port [-w <warning time>] [-c <critical time>] [-s <send string>]\n",progname);
 654   printf ("[-e <expect string>] [-q <quit string>][-m <maximum bytes>] [-d <delay>]\n");
 655   printf ("[-t <timeout seconds>] [-r <refuse state>] [-M <mismatch state>] [-v] [-4|-6] [-j]\n");
 656   printf ("[-D <days to cert expiry>] [-S <use SSL>] [-E]\n");
 657 }
 658