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_warn, days_till_exp_crit;
  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 int host_specified = FALSE;
  65 static char *server_send = NULL;
  66 static char *server_quit = NULL;
  67 static char **server_expect;
  68 static size_t server_expect_count = 0;
  69 static size_t maxbytes = 0;
  70 static char **warn_codes = NULL;
  71 static size_t warn_codes_count = 0;
  72 static char **crit_codes = NULL;
  73 static size_t crit_codes_count = 0;
  74 static unsigned int delay = 0;
  75 static double warning_time = 0;
  76 static double critical_time = 0;
  77 static double elapsed_time = 0;
  78 static long microsec;
  79 static int sd = 0;
  80 #define MAXBUF 1024
  81 static char buffer[MAXBUF];
  82 static int expect_mismatch_state = STATE_WARNING;
  83
  84 #define FLAG_SSL 0x01
  85 #define FLAG_VERBOSE 0x02
  86 #define FLAG_EXACT_MATCH 0x04
  87 #define FLAG_TIME_WARN 0x08
  88 #define FLAG_TIME_CRIT 0x10
  89 #define FLAG_HIDE_OUTPUT 0x20
  90 #define FLAG_MATCH_ALL 0x40
  91 static size_t flags = FLAG_EXACT_MATCH;
  92
  93 int
  94 main (int argc, char **argv)
  95 {
  96         int result = STATE_UNKNOWN;
  97         int i;
  98         char *status = NULL;
  99         struct timeval tv;
 100         size_t len;
 101         int match = -1;
 102
 103         setlocale (LC_ALL, "");
 104         bindtextdomain (PACKAGE, LOCALEDIR);
 105         textdomain (PACKAGE);
 106
 107         /* determine program- and service-name quickly */
 108         progname = strrchr(argv[0], '/');
 109         if(progname != NULL) progname++;
 110         else progname = argv[0];
 111
 112         len = strlen(progname);
 113         if(len > 6 && !memcmp(progname, "check_", 6)) {
 114                 SERVICE = strdup(progname + 6);
 115                 for(i = 0; i < len - 6; i++)
 116                         SERVICE[i] = toupper(SERVICE[i]);
 117         }
 118
 119         /* set up a resonable buffer at first (will be realloc()'ed if
 120          * user specifies other options) */
 121         server_expect = calloc(sizeof(char *), 2);
 122
 123         /* determine defaults for this service's protocol */
 124         if (!strncmp(SERVICE, "UDP", 3)) {
 125                 PROTOCOL = IPPROTO_UDP;
 126         }
 127         else if (!strncmp(SERVICE, "FTP", 3)) {
 128                 EXPECT = "220";
 129                 QUIT = "QUIT\r\n";
 130                 PORT = 21;
 131         }
 132         else if (!strncmp(SERVICE, "POP", 3) || !strncmp(SERVICE, "POP3", 4)) {
 133                 EXPECT = "+OK";
 134                 QUIT = "QUIT\r\n";
 135                 PORT = 110;
 136         }
 137         else if (!strncmp(SERVICE, "SMTP", 4)) {
 138                 EXPECT = "220";
 139                 QUIT = "QUIT\r\n";
 140                 PORT = 25;
 141         }
 142         else if (!strncmp(SERVICE, "IMAP", 4)) {
 143                 EXPECT = "* OK";
 144                 QUIT = "a1 LOGOUT\r\n";
 145                 PORT = 143;
 146         }
 147 #ifdef HAVE_SSL
 148         else if (!strncmp(SERVICE, "SIMAP", 5)) {
 149                 EXPECT = "* OK";
 150                 QUIT = "a1 LOGOUT\r\n";
 151                 flags |= FLAG_SSL;
 152                 PORT = 993;
 153         }
 154         else if (!strncmp(SERVICE, "SPOP", 4)) {
 155                 EXPECT = "+OK";
 156                 QUIT = "QUIT\r\n";
 157                 flags |= FLAG_SSL;
 158                 PORT = 995;
 159         }
 160         else if (!strncmp(SERVICE, "SSMTP", 5)) {
 161                 EXPECT = "220";
 162                 QUIT = "QUIT\r\n";
 163                 flags |= FLAG_SSL;
 164                 PORT = 465;
 165         }
 166         else if (!strncmp(SERVICE, "JABBER", 6)) {
 167                 SEND = "<stream:stream to=\'host\' xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'>\n";
 168                 EXPECT = "<?xml version=\'1.0\'?><stream:stream xmlns=\'jabber:client\' xmlns:stream=\'http://etherx.jabber.org/streams\'";
 169                 QUIT = "</stream:stream>\n";
 170                 flags |= FLAG_HIDE_OUTPUT;
 171                 PORT = 5222;
 172         }
 173         else if (!strncmp (SERVICE, "NNTPS", 5)) {
 174                 server_expect_count = 2;
 175                 server_expect[0] = "200";
 176                 server_expect[1] = "201";
 177                 QUIT = "QUIT\r\n";
 178                 flags |= FLAG_SSL;
 179                 PORT = 563;
 180         }
 181 #endif
 182         else if (!strncmp (SERVICE, "NNTP", 4)) {
 183                 server_expect_count = 2;
 184                 server_expect = malloc(sizeof(char *) * server_expect_count);
 185                 server_expect[0] = strdup("200");
 186                 server_expect[1] = strdup("201");
 187                 QUIT = "QUIT\r\n";
 188                 PORT = 119;
 189         }
 190         else if (!strncmp(SERVICE, "CLAMD", 5)) {
 191                 SEND = "PING";
 192                 EXPECT = "PONG";
 193                 QUIT = NULL;
 194                 PORT = 3310;
 195         }
 196         /* fallthrough check, so it's supposed to use reverse matching */
 197         else if (strcmp (SERVICE, "TCP"))
 198                 usage (_("CRITICAL - Generic check_tcp called with unknown service\n"));
 199
 200         server_address = "127.0.0.1";
 201         server_port = PORT;
 202         server_send = SEND;
 203         server_quit = QUIT;
 204         status = NULL;
 205
 206         /* Parse extra opts if any */
 207         argv=np_extra_opts (&argc, argv, progname);
 208
 209         if (process_arguments (argc, argv) == ERROR)
 210                 usage4 (_("Could not parse arguments"));
 211
 212         if(flags & FLAG_VERBOSE) {
 213                 printf("Using service %s\n", SERVICE);
 214                 printf("Port: %d\n", server_port);
 215                 printf("flags: 0x%x\n", (int)flags);
 216         }
 217
 218         if(EXPECT && !server_expect_count)
 219                 server_expect_count++;
 220
 221         if(PROTOCOL==IPPROTO_UDP && !(server_expect_count && server_send)){
 222                 usage(_("With UDP checks, a send/expect string must be specified."));
 223         }
 224
 225         /* set up the timer */
 226         signal (SIGALRM, socket_timeout_alarm_handler);
 227         alarm (socket_timeout);
 228
 229         /* try to connect to the host at the given port number */
 230         gettimeofday (&tv, NULL);
 231
 232         result = np_net_connect (server_address, server_port, &sd, PROTOCOL);
 233         if (result == STATE_CRITICAL) return STATE_CRITICAL;
 234
 235 #ifdef HAVE_SSL
 236         if (flags & FLAG_SSL){
 237                 result = np_net_ssl_init(sd);
 238                 if (result == STATE_OK && check_cert == TRUE) {
 239                         result = np_net_ssl_check_cert(days_till_exp_warn, days_till_exp_crit);
 240                 }
 241         }
 242         if(result != STATE_OK){
 243                 np_net_ssl_cleanup();
 244                 if(sd) close(sd);
 245                 return result;
 246         }
 247 #endif /* HAVE_SSL */
 248
 249         if (server_send != NULL) {              /* Something to send? */
 250                 my_send(server_send, strlen(server_send));
 251         }
 252
 253         if (delay > 0) {
 254                 tv.tv_sec += delay;
 255                 sleep (delay);
 256         }
 257
 258         if(flags & FLAG_VERBOSE) {
 259                 if (server_send) {
 260                         printf("Send string: %s\n", server_send);
 261                 }
 262                 if (server_quit) {
 263                         printf("Quit string: %s\n", server_quit);
 264                 }
 265                 printf("server_expect_count: %d\n", (int)server_expect_count);
 266                 for(i = 0; i < server_expect_count; i++)
 267                         printf("\t%d: %s\n", i, server_expect[i]);
 268         }
 269
 270         /* if(len) later on, we know we have a non-NULL response */
 271         len = 0;
 272         if (server_expect_count) {
 273
 274                 /* watch for the expect string */
 275                 while ((i = my_recv(buffer, sizeof(buffer))) > 0) {
 276                         status = realloc(status, len + i + 1);
 277                         memcpy(&status[len], buffer, i);
 278                         len += i;
 279
 280                         /* stop reading if user-forced or data-starved */
 281                         if(i < sizeof(buffer) || (maxbytes && len >= maxbytes))
 282                                 break;
 283
 284                         if (maxbytes && len >= maxbytes)
 285                                 break;
 286                 }
 287
 288                 /* no data when expected, so return critical */
 289                 if (len == 0)
 290                         die (STATE_CRITICAL, _("No data received from host\n"));
 291
 292                 /* force null-termination and strip whitespace from end of output */
 293                 status[len--] = '\0';
 294                 /* print raw output if we're debugging */
 295                 if(flags & FLAG_VERBOSE)
 296                         printf("received %d bytes from host\n#-raw-recv-------#\n%s\n#-raw-recv-------#\n",
 297                                (int)len + 1, status);
 298                 while(isspace(status[len])) status[len--] = '\0';
 299
 300                 match = np_expect_match(status,
 301                                 server_expect,
 302                                 server_expect_count,
 303                                 (flags & FLAG_MATCH_ALL ? TRUE : FALSE),
 304                                 (flags & FLAG_EXACT_MATCH ? TRUE : FALSE),
 305                                 (flags & FLAG_VERBOSE ? TRUE : FALSE));
 306         }
 307
 308         if (server_quit != NULL) {
 309                 my_send(server_quit, strlen(server_quit));
 310         }
 311 #ifdef HAVE_SSL
 312         np_net_ssl_cleanup();
 313 #endif
 314         if (sd) close (sd);
 315
 316         microsec = deltime (tv);
 317         elapsed_time = (double)microsec / 1.0e6;
 318
 319         if (flags & FLAG_TIME_CRIT && elapsed_time > critical_time)
 320                 result = STATE_CRITICAL;
 321         else if (flags & FLAG_TIME_WARN && elapsed_time > warning_time)
 322                 result = STATE_WARNING;
 323
 324         /* did we get the response we hoped? */
 325         if(match == FALSE && result != STATE_CRITICAL)
 326                 result = expect_mismatch_state;
 327
 328         /* reset the alarm */
 329         alarm (0);
 330
 331         /* this is a bit stupid, because we don't want to print the
 332          * response time (which can look ok to the user) if we didn't get
 333          * the response we were looking for. if-else */
 334         printf("%s %s - ", SERVICE, state_text(result));
 335
 336         if(match == FALSE && len && !(flags & FLAG_HIDE_OUTPUT))
 337                 printf("Unexpected response from host/socket: %s", status);
 338         else {
 339                 if(match == FALSE)
 340                         printf("Unexpected response from host/socket on ");
 341                 else
 342                         printf("%.3f second response time on ", elapsed_time);
 343                 if(server_address[0] != '/')
 344                         printf("port %d", server_port);
 345                 else
 346                         printf("socket %s", server_address);
 347         }
 348
 349         if (match != FALSE && !(flags & FLAG_HIDE_OUTPUT) && len)
 350                 printf (" [%s]", status);
 351
 352         /* perf-data doesn't apply when server doesn't talk properly,
 353          * so print all zeroes on warn and crit. Use fperfdata since
 354          * localisation settings can make different outputs */
 355         if(match == FALSE)
 356                 printf ("|%s",
 357                                 fperfdata ("time", elapsed_time, "s",
 358                                 (flags & FLAG_TIME_WARN ? TRUE : FALSE), 0,
 359                                 (flags & FLAG_TIME_CRIT ? TRUE : FALSE), 0,
 360                                 TRUE, 0,
 361                                 TRUE, socket_timeout)
 362                         );
 363         else
 364                 printf("|%s",
 365                                 fperfdata ("time", elapsed_time, "s",
 366                                 (flags & FLAG_TIME_WARN ? TRUE : FALSE), warning_time,
 367                                 (flags & FLAG_TIME_CRIT ? TRUE : FALSE), critical_time,
 368                                 TRUE, 0,
 369                                 TRUE, socket_timeout)
 370                         );
 371
 372         putchar('\n');
 373         return result;
 374 }
 375
 376
 377
 378 /* process command-line arguments */
 379 static int
 380 process_arguments (int argc, char **argv)
 381 {
 382         int c;
 383         int escape = 0;
 384         char *temp;
 385
 386         int option = 0;
 387         static struct option longopts[] = {
 388                 {"hostname", required_argument, 0, 'H'},
 389                 {"critical", required_argument, 0, 'c'},
 390                 {"warning", required_argument, 0, 'w'},
 391                 {"critical-codes", required_argument, 0, 'C'},
 392                 {"warning-codes", required_argument, 0, 'W'},
 393                 {"timeout", required_argument, 0, 't'},
 394                 {"protocol", required_argument, 0, 'P'}, /* FIXME: Unhandled */
 395                 {"port", required_argument, 0, 'p'},
 396                 {"escape", no_argument, 0, 'E'},
 397                 {"all", no_argument, 0, 'A'},
 398                 {"send", required_argument, 0, 's'},
 399                 {"expect", required_argument, 0, 'e'},
 400                 {"maxbytes", required_argument, 0, 'm'},
 401                 {"quit", required_argument, 0, 'q'},
 402                 {"jail", no_argument, 0, 'j'},
 403                 {"delay", required_argument, 0, 'd'},
 404                 {"refuse", required_argument, 0, 'r'},
 405                 {"mismatch", required_argument, 0, 'M'},
 406                 {"use-ipv4", no_argument, 0, '4'},
 407                 {"use-ipv6", no_argument, 0, '6'},
 408                 {"verbose", no_argument, 0, 'v'},
 409                 {"version", no_argument, 0, 'V'},
 410                 {"help", no_argument, 0, 'h'},
 411                 {"ssl", no_argument, 0, 'S'},
 412                 {"certificate", required_argument, 0, 'D'},
 413                 {0, 0, 0, 0}
 414         };
 415
 416         if (argc < 2)
 417                 usage4 (_("No arguments found"));
 418
 419         /* backwards compatibility */
 420         for (c = 1; c < argc; c++) {
 421                 if (strcmp ("-to", argv[c]) == 0)
 422                         strcpy (argv[c], "-t");
 423                 else if (strcmp ("-wt", argv[c]) == 0)
 424                         strcpy (argv[c], "-w");
 425                 else if (strcmp ("-ct", argv[c]) == 0)
 426                         strcpy (argv[c], "-c");
 427         }
 428
 429         if (!is_option (argv[1])) {
 430                 server_address = argv[1];
 431                 argv[1] = argv[0];
 432                 argv = &argv[1];
 433                 argc--;
 434         }
 435
 436         while (1) {
 437                 c = getopt_long (argc, argv, "+hVv46EAH:s:e:q:m:c:w:t:p:C:W:d:Sr:jD:M:",
 438                                  longopts, &option);
 439
 440                 if (c == -1 || c == EOF || c == 1)
 441                         break;
 442
 443                 switch (c) {
 444                 case '?':                 /* print short usage statement if args not parsable */
 445                         usage5 ();
 446                 case 'h':                 /* help */
 447                         print_help ();
 448                         exit (STATE_OK);
 449                 case 'V':                 /* version */
 450                         print_revision (progname, NP_VERSION);
 451                         exit (STATE_OK);
 452                 case 'v':                 /* verbose mode */
 453                         flags |= FLAG_VERBOSE;
 454                         break;
 455                 case '4':
 456                         address_family = AF_INET;
 457                         break;
 458                 case '6':
 459 #ifdef USE_IPV6
 460                         address_family = AF_INET6;
 461 #else
 462                         usage4 (_("IPv6 support not available"));
 463 #endif
 464                         break;
 465                 case 'H':                 /* hostname */
 466                         host_specified = TRUE;
 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                                 xasprintf(&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                                 xasprintf(&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 ((temp=strchr(optarg,','))!=NULL) {
 559                             *temp='\0';
 560                             if (!is_intnonneg (optarg))
 561                                usage2 (_("Invalid certificate expiration period"), optarg);                              days_till_exp_warn = atoi(optarg);
 562                             *temp=',';
 563                             temp++;
 564                             if (!is_intnonneg (temp))
 565                                 usage2 (_("Invalid certificate expiration period"), temp);
 566                             days_till_exp_crit = atoi (temp);
 567                         }
 568                         else {
 569                             days_till_exp_crit=0;
 570                             if (!is_intnonneg (optarg))
 571                                 usage2 (_("Invalid certificate expiration period"), optarg);
 572                             days_till_exp_warn = atoi (optarg);
 573                         }
 574                         check_cert = TRUE;
 575                         flags |= FLAG_SSL;
 576                         break;
 577 #  endif /* USE_OPENSSL */
 578 #endif
 579                         /* fallthrough if we don't have ssl */
 580                 case 'S':
 581 #ifdef HAVE_SSL
 582                         flags |= FLAG_SSL;
 583 #else
 584                         die (STATE_UNKNOWN, _("Invalid option - SSL is not available"));
 585 #endif
 586                         break;
 587                 case 'A':
 588                         flags |= FLAG_MATCH_ALL;
 589                         break;
 590                 }
 591         }
 592
 593         c = optind;
 594         if(host_specified == FALSE && c < argc)
 595                 server_address = strdup (argv[c++]);
 596
 597         if (server_address == NULL)
 598                 usage4 (_("You must provide a server address"));
 599         else if (server_address[0] != '/' && is_host (server_address) == FALSE)
 600                 die (STATE_CRITICAL, "%s %s - %s: %s\n", SERVICE, state_text(STATE_CRITICAL), _("Invalid hostname, address or socket"), server_address);
 601
 602         return TRUE;
 603 }
 604
 605
 606 void
 607 print_help (void)
 608 {
 609         print_revision (progname, NP_VERSION);
 610
 611         printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
 612         printf (COPYRIGHT, copyright, email);
 613
 614         printf (_("This plugin tests %s connections with the specified host (or unix socket).\n\n"),
 615                 SERVICE);
 616
 617         print_usage ();
 618
 619         printf (UT_HELP_VRSN);
 620         printf (UT_EXTRA_OPTS);
 621
 622         printf (UT_HOST_PORT, 'p', "none");
 623
 624         printf (UT_IPv46);
 625
 626         printf (" %s\n", "-E, --escape");
 627   printf ("    %s\n", _("Can use \\n, \\r, \\t or \\ in send or quit string. Must come before send or quit option"));
 628   printf ("    %s\n", _("Default: nothing added to send, \\r\\n added to end of quit"));
 629   printf (" %s\n", "-s, --send=STRING");
 630   printf ("    %s\n", _("String to send to the server"));
 631   printf (" %s\n", "-e, --expect=STRING");
 632   printf ("    %s %s\n", _("String to expect in server response"), _("(may be repeated)"));
 633   printf (" %s\n", "-A, --all");
 634   printf ("    %s\n", _("All expect strings need to occur in server response. Default is any"));
 635   printf (" %s\n", "-q, --quit=STRING");
 636   printf ("    %s\n", _("String to send server to initiate a clean close of the connection"));
 637   printf (" %s\n", "-r, --refuse=ok|warn|crit");
 638   printf ("    %s\n", _("Accept TCP refusals with states ok, warn, crit (default: crit)"));
 639   printf (" %s\n", "-M, --mismatch=ok|warn|crit");
 640   printf ("    %s\n", _("Accept expected string mismatches with states ok, warn, crit (default: warn)"));
 641   printf (" %s\n", "-j, --jail");
 642   printf ("    %s\n", _("Hide output from TCP socket"));
 643   printf (" %s\n", "-m, --maxbytes=INTEGER");
 644   printf ("    %s\n", _("Close connection once more than this number of bytes are received"));
 645   printf (" %s\n", "-d, --delay=INTEGER");
 646   printf ("    %s\n", _("Seconds to wait between sending string and polling for response"));
 647
 648 #ifdef HAVE_SSL
 649         printf (" %s\n", "-D, --certificate=INTEGER[,INTEGER]");
 650   printf ("    %s\n", _("Minimum number of days a certificate has to be valid."));
 651   printf ("    %s\n", _("1st is #days for warning, 2nd is critical (if not specified - 0)."));
 652   printf (" %s\n", "-S, --ssl");
 653   printf ("    %s\n", _("Use SSL for the connection."));
 654 #endif
 655
 656         printf (UT_WARN_CRIT);
 657
 658         printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
 659
 660         printf (UT_VERBOSE);
 661
 662         printf (UT_SUPPORT);
 663 }
 664
 665
 666 void
 667 print_usage (void)
 668 {
 669         printf ("%s\n", _("Usage:"));
 670   printf ("%s -H host -p port [-w <warning time>] [-c <critical time>] [-s <send string>]\n",progname);
 671   printf ("[-e <expect string>] [-q <quit string>][-m <maximum bytes>] [-d <delay>]\n");
 672   printf ("[-t <timeout seconds>] [-r <refuse state>] [-M <mismatch state>] [-v] [-4|-6] [-j]\n");
 673   printf ("[-D <warn days cert expire>[,<crit days cert expire>]] [-S <use SSL>] [-E]\n");
 674 }