1 /******************************************************************************
2 *
3 * Nagios check_smtp plugin
4 *
5 * License: GPL
6 * Copyright (c) 1999-2006 nagios-plugins team
7 *
8 * Last Modified: $Date$
9 *
10 * Description:
11 *
12 * This file contains the check_smtp plugin
13 *
14 * License Information:
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 *
30 *
31 * $Id$
32 *
33 ******************************************************************************/
35 const char *progname = "check_smtp";
36 const char *revision = "$Revision$";
37 const char *copyright = "2000-2006";
38 const char *email = "nagiosplug-devel@lists.sourceforge.net";
40 #include "common.h"
41 #include "netutils.h"
42 #include "utils.h"
44 #ifdef HAVE_SSL
45 int check_cert = FALSE;
46 int days_till_exp;
47 # define my_recv(buf, len) ((use_ssl && ssl_established) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
48 # define my_send(buf, len) ((use_ssl && ssl_established) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
49 #else /* ifndef HAVE_SSL */
50 # define my_recv(buf, len) read(sd, buf, len)
51 # define my_send(buf, len) send(sd, buf, len, 0)
52 #endif
54 enum {
55 SMTP_PORT = 25
56 };
57 #define SMTP_EXPECT "220"
58 #define SMTP_HELO "HELO "
59 #define SMTP_EHLO "EHLO "
60 #define SMTP_QUIT "QUIT\r\n"
61 #define SMTP_STARTTLS "STARTTLS\r\n"
62 #define SMTP_AUTH_LOGIN "AUTH LOGIN\r\n"
64 #ifndef HOST_MAX_BYTES
65 #define HOST_MAX_BYTES 255
66 #endif
68 #define EHLO_SUPPORTS_STARTTLS 1
70 int process_arguments (int, char **);
71 int validate_arguments (void);
72 void print_help (void);
73 void print_usage (void);
74 int my_close(void);
76 #include "regex.h"
77 char regex_expect[MAX_INPUT_BUFFER] = "";
78 regex_t preg;
79 regmatch_t pmatch[10];
80 char timestamp[20] = "";
81 char errbuf[MAX_INPUT_BUFFER];
82 int cflags = REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
83 int eflags = 0;
84 int errcode, excode;
86 int server_port = SMTP_PORT;
87 char *server_address = NULL;
88 char *server_expect = NULL;
89 int smtp_use_dummycmd = 0;
90 char *mail_command = NULL;
91 char *from_arg = NULL;
92 int ncommands=0;
93 int command_size=0;
94 int nresponses=0;
95 int response_size=0;
96 char **commands = NULL;
97 char **responses = NULL;
98 char *authtype = NULL;
99 char *authuser = NULL;
100 char *authpass = NULL;
101 int warning_time = 0;
102 int check_warning_time = FALSE;
103 int critical_time = 0;
104 int check_critical_time = FALSE;
105 int verbose = 0;
106 int use_ssl = FALSE;
107 short use_ehlo = FALSE;
108 short ssl_established = 0;
109 char *localhostname = NULL;
110 int sd;
111 char buffer[MAX_INPUT_BUFFER];
112 enum {
113 TCP_PROTOCOL = 1,
114 UDP_PROTOCOL = 2,
115 MAXBUF = 1024
116 };
118 /* written by lauri alanko */
119 static char *
120 base64 (const char *bin, size_t len)
121 {
123 char *buf = (char *) malloc ((len + 2) / 3 * 4 + 1);
124 size_t i = 0, j = 0;
126 char BASE64_END = '=';
127 char base64_table[64];
128 strncpy (base64_table, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/", 64);
130 while (j < len - 2) {
131 buf[i++] = base64_table[bin[j] >> 2];
132 buf[i++] = base64_table[((bin[j] & 3) << 4) | (bin[j + 1] >> 4)];
133 buf[i++] = base64_table[((bin[j + 1] & 15) << 2) | (bin[j + 2] >> 6)];
134 buf[i++] = base64_table[bin[j + 2] & 63];
135 j += 3;
136 }
138 switch (len - j) {
139 case 1:
140 buf[i++] = base64_table[bin[j] >> 2];
141 buf[i++] = base64_table[(bin[j] & 3) << 4];
142 buf[i++] = BASE64_END;
143 buf[i++] = BASE64_END;
144 break;
145 case 2:
146 buf[i++] = base64_table[bin[j] >> 2];
147 buf[i++] = base64_table[((bin[j] & 3) << 4) | (bin[j + 1] >> 4)];
148 buf[i++] = base64_table[(bin[j + 1] & 15) << 2];
149 buf[i++] = BASE64_END;
150 break;
151 case 0:
152 break;
153 }
155 buf[i] = '\0';
156 return buf;
157 }
159 int
160 main (int argc, char **argv)
161 {
162 short supports_tls=FALSE;
163 int n = 0;
164 double elapsed_time;
165 long microsec;
166 int result = STATE_UNKNOWN;
167 char *cmd_str = NULL;
168 char *helocmd = NULL;
169 char *error_msg = NULL;
170 struct timeval tv;
171 struct hostent *hp;
173 setlocale (LC_ALL, "");
174 bindtextdomain (PACKAGE, LOCALEDIR);
175 textdomain (PACKAGE);
177 if (process_arguments (argc, argv) == ERROR)
178 usage4 (_("Could not parse arguments"));
180 /* initialize the HELO command with the localhostname */
181 if(! localhostname){
182 localhostname = malloc (HOST_MAX_BYTES);
183 if(!localhostname){
184 printf(_("malloc() failed!\n"));
185 return STATE_CRITICAL;
186 }
187 if(gethostname(localhostname, HOST_MAX_BYTES)){
188 printf(_("gethostname() failed!\n"));
189 return STATE_CRITICAL;
190 }
191 hp = gethostbyname(localhostname);
192 if(!hp) helocmd = localhostname;
193 else helocmd = hp->h_name;
194 } else {
195 helocmd = localhostname;
196 }
197 if(use_ehlo)
198 asprintf (&helocmd, "%s%s%s", SMTP_EHLO, helocmd, "\r\n");
199 else
200 asprintf (&helocmd, "%s%s%s", SMTP_HELO, helocmd, "\r\n");
202 /* initialize the MAIL command with optional FROM command */
203 asprintf (&cmd_str, "%sFROM: %s%s", mail_command, from_arg, "\r\n");
205 if (verbose && smtp_use_dummycmd)
206 printf ("FROM CMD: %s", cmd_str);
208 /* initialize alarm signal handling */
209 (void) signal (SIGALRM, socket_timeout_alarm_handler);
211 /* set socket timeout */
212 (void) alarm (socket_timeout);
214 /* start timer */
215 gettimeofday (&tv, NULL);
217 /* try to connect to the host at the given port number */
218 result = my_tcp_connect (server_address, server_port, &sd);
220 if (result == STATE_OK) { /* we connected */
222 /* watch for the SMTP connection string and */
223 /* return a WARNING status if we couldn't read any data */
224 if (recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0) == -1) {
225 printf (_("recv() failed\n"));
226 result = STATE_WARNING;
227 }
228 else {
229 if (verbose)
230 printf ("%s", buffer);
231 /* strip the buffer of carriage returns */
232 strip (buffer);
233 /* make sure we find the response we are looking for */
234 if (!strstr (buffer, server_expect)) {
235 if (server_port == SMTP_PORT)
236 printf (_("Invalid SMTP response received from host\n"));
237 else
238 printf (_("Invalid SMTP response received from host on port %d\n"),
239 server_port);
240 result = STATE_WARNING;
241 }
242 }
244 /* send the HELO/EHLO command */
245 send(sd, helocmd, strlen(helocmd), 0);
247 /* allow for response to helo command to reach us */
248 if(read (sd, buffer, MAXBUF - 1) < 0){
249 printf (_("recv() failed\n"));
250 return STATE_WARNING;
251 } else if(use_ehlo){
252 buffer[MAXBUF-1]='\0';
253 if(strstr(buffer, "250 STARTTLS") != NULL ||
254 strstr(buffer, "250-STARTTLS") != NULL){
255 supports_tls=TRUE;
256 }
257 }
259 if(use_ssl && ! supports_tls){
260 printf(_("WARNING - TLS not supported by server\n"));
261 send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0);
262 return STATE_WARNING;
263 }
265 #ifdef HAVE_SSL
266 if(use_ssl) {
267 /* send the STARTTLS command */
268 send(sd, SMTP_STARTTLS, strlen(SMTP_STARTTLS), 0);
270 recv(sd,buffer, MAX_INPUT_BUFFER-1, 0); /* wait for it */
271 if (!strstr (buffer, server_expect)) {
272 printf (_("Server does not support STARTTLS\n"));
273 send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0);
274 return STATE_UNKNOWN;
275 }
276 result = np_net_ssl_init(sd);
277 if(result != STATE_OK) {
278 printf (_("CRITICAL - Cannot create SSL context.\n"));
279 np_net_ssl_cleanup();
280 close(sd);
281 return STATE_CRITICAL;
282 } else {
283 ssl_established = 1;
284 }
285 # ifdef USE_OPENSSL
286 if ( check_cert ) {
287 result = np_net_ssl_check_cert(days_till_exp);
288 if(result != STATE_OK){
289 printf (_("CRITICAL - Cannot retrieve server certificate.\n"));
290 }
291 my_close();
292 return result;
293 }
294 # endif /* USE_OPENSSL */
295 }
296 #endif
298 /* sendmail will syslog a "NOQUEUE" error if session does not attempt
299 * to do something useful. This can be prevented by giving a command
300 * even if syntax is illegal (MAIL requires a FROM:<...> argument)
301 *
302 * According to rfc821 you can include a null reversepath in the from command
303 * - but a log message is generated on the smtp server.
304 *
305 * You can disable sending mail_command with '--nocommand'
306 * Use the -f option to provide a FROM address
307 */
308 if (smtp_use_dummycmd) {
309 my_send(cmd_str, strlen(cmd_str));
310 my_recv(buffer, MAX_INPUT_BUFFER-1);
311 if (verbose)
312 printf("%s", buffer);
313 }
315 while (n < ncommands) {
316 asprintf (&cmd_str, "%s%s", commands[n], "\r\n");
317 my_send(cmd_str, strlen(cmd_str));
318 my_recv(buffer, MAX_INPUT_BUFFER-1);
319 if (verbose)
320 printf("%s", buffer);
321 strip (buffer);
322 if (n < nresponses) {
323 cflags |= REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
324 errcode = regcomp (&preg, responses[n], cflags);
325 if (errcode != 0) {
326 regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
327 printf (_("Could Not Compile Regular Expression"));
328 return ERROR;
329 }
330 excode = regexec (&preg, buffer, 10, pmatch, eflags);
331 if (excode == 0) {
332 result = STATE_OK;
333 }
334 else if (excode == REG_NOMATCH) {
335 result = STATE_WARNING;
336 printf (_("SMTP %s - Invalid response '%s' to command '%s'\n"), state_text (result), buffer, commands[n]);
337 }
338 else {
339 regerror (excode, &preg, errbuf, MAX_INPUT_BUFFER);
340 printf (_("Execute Error: %s\n"), errbuf);
341 result = STATE_UNKNOWN;
342 }
343 }
344 n++;
345 }
347 if (authtype != NULL) {
348 if (strcmp (authtype, "LOGIN") == 0) {
349 char *abuf;
350 int ret;
351 do {
352 if (authuser == NULL) {
353 result = STATE_CRITICAL;
354 error_msg = _("no authuser specified, ");
355 break;
356 }
357 if (authpass == NULL) {
358 result = STATE_CRITICAL;
359 error_msg = _("no authpass specified, ");
360 break;
361 }
363 /* send AUTH LOGIN */
364 my_send(SMTP_AUTH_LOGIN, strlen(SMTP_AUTH_LOGIN));
365 if (verbose)
366 printf (_("sent %s\n"), "AUTH LOGIN");
368 if((ret = my_recv(buffer, MAXBUF - 1)) < 0){
369 error_msg = _("recv() failed after AUTH LOGIN, \n");
370 result = STATE_WARNING;
371 break;
372 }
373 buffer[ret] = 0;
374 if (verbose)
375 printf (_("received %s\n"), buffer);
377 if (strncmp (buffer, "334", 3) != 0) {
378 result = STATE_CRITICAL;
379 error_msg = _("invalid response received after AUTH LOGIN, ");
380 break;
381 }
383 /* encode authuser with base64 */
384 abuf = base64 (authuser, strlen(authuser));
385 strcat (abuf, "\r\n");
386 my_send(abuf, strlen(abuf));
387 if (verbose)
388 printf (_("sent %s\n"), abuf);
390 if ((ret = my_recv(buffer, MAX_INPUT_BUFFER-1)) == -1) {
391 result = STATE_CRITICAL;
392 error_msg = _("recv() failed after sending authuser, ");
393 break;
394 }
395 buffer[ret] = 0;
396 if (verbose) {
397 printf (_("received %s\n"), buffer);
398 }
399 if (strncmp (buffer, "334", 3) != 0) {
400 result = STATE_CRITICAL;
401 error_msg = _("invalid response received after authuser, ");
402 break;
403 }
404 /* encode authpass with base64 */
405 abuf = base64 (authpass, strlen(authpass));
406 strcat (abuf, "\r\n");
407 my_send(abuf, strlen(abuf));
408 if (verbose) {
409 printf (_("sent %s\n"), abuf);
410 }
411 if ((ret = my_recv(buffer, MAX_INPUT_BUFFER-1)) == -1) {
412 result = STATE_CRITICAL;
413 error_msg = _("recv() failed after sending authpass, ");
414 break;
415 }
416 buffer[ret] = 0;
417 if (verbose) {
418 printf (_("received %s\n"), buffer);
419 }
420 if (strncmp (buffer, "235", 3) != 0) {
421 result = STATE_CRITICAL;
422 error_msg = _("invalid response received after authpass, ");
423 break;
424 }
425 break;
426 } while (0);
427 } else {
428 result = STATE_CRITICAL;
429 error_msg = _("only authtype LOGIN is supported, ");
430 }
431 }
433 /* tell the server we're done */
434 my_send (SMTP_QUIT, strlen (SMTP_QUIT));
436 /* finally close the connection */
437 close (sd);
438 }
440 /* reset the alarm */
441 alarm (0);
443 microsec = deltime (tv);
444 elapsed_time = (double)microsec / 1.0e6;
446 if (result == STATE_OK) {
447 if (check_critical_time && elapsed_time > (double) critical_time)
448 result = STATE_CRITICAL;
449 else if (check_warning_time && elapsed_time > (double) warning_time)
450 result = STATE_WARNING;
451 }
453 printf (_("SMTP %s - %s%.3f sec. response time%s%s|%s\n"),
454 state_text (result),
455 (error_msg == NULL ? "" : error_msg),
456 elapsed_time,
457 verbose?", ":"", verbose?buffer:"",
458 fperfdata ("time", elapsed_time, "s",
459 (int)check_warning_time, warning_time,
460 (int)check_critical_time, critical_time,
461 TRUE, 0, FALSE, 0));
463 return result;
464 }
468 /* process command-line arguments */
469 int
470 process_arguments (int argc, char **argv)
471 {
472 int c;
474 int option = 0;
475 static struct option longopts[] = {
476 {"hostname", required_argument, 0, 'H'},
477 {"expect", required_argument, 0, 'e'},
478 {"critical", required_argument, 0, 'c'},
479 {"warning", required_argument, 0, 'w'},
480 {"timeout", required_argument, 0, 't'},
481 {"port", required_argument, 0, 'p'},
482 {"from", required_argument, 0, 'f'},
483 {"fqdn", required_argument, 0, 'F'},
484 {"authtype", required_argument, 0, 'A'},
485 {"authuser", required_argument, 0, 'U'},
486 {"authpass", required_argument, 0, 'P'},
487 {"command", required_argument, 0, 'C'},
488 {"response", required_argument, 0, 'R'},
489 {"nocommand", required_argument, 0, 'n'},
490 {"verbose", no_argument, 0, 'v'},
491 {"version", no_argument, 0, 'V'},
492 {"use-ipv4", no_argument, 0, '4'},
493 {"use-ipv6", no_argument, 0, '6'},
494 {"help", no_argument, 0, 'h'},
495 {"starttls",no_argument,0,'S'},
496 {"certificate",required_argument,0,'D'},
497 {0, 0, 0, 0}
498 };
500 if (argc < 2)
501 return ERROR;
503 for (c = 1; c < argc; c++) {
504 if (strcmp ("-to", argv[c]) == 0)
505 strcpy (argv[c], "-t");
506 else if (strcmp ("-wt", argv[c]) == 0)
507 strcpy (argv[c], "-w");
508 else if (strcmp ("-ct", argv[c]) == 0)
509 strcpy (argv[c], "-c");
510 }
512 while (1) {
513 c = getopt_long (argc, argv, "+hVv46t:p:f:e:c:w:H:C:R:SD:F:A:U:P:",
514 longopts, &option);
516 if (c == -1 || c == EOF)
517 break;
519 switch (c) {
520 case 'H': /* hostname */
521 if (is_host (optarg)) {
522 server_address = optarg;
523 }
524 else {
525 usage2 (_("Invalid hostname/address"), optarg);
526 }
527 break;
528 case 'p': /* port */
529 if (is_intpos (optarg))
530 server_port = atoi (optarg);
531 else
532 usage4 (_("Port must be a positive integer"));
533 break;
534 case 'F':
535 /* localhostname */
536 localhostname = strdup(optarg);
537 break;
538 case 'f': /* from argument */
539 from_arg = optarg;
540 smtp_use_dummycmd = 1;
541 break;
542 case 'A':
543 authtype = optarg;
544 break;
545 case 'U':
546 authuser = optarg;
547 break;
548 case 'P':
549 authpass = optarg;
550 break;
551 case 'e': /* server expect string on 220 */
552 server_expect = optarg;
553 break;
554 case 'C': /* commands */
555 if (ncommands >= command_size) {
556 commands = realloc (commands, command_size+8);
557 if (commands == NULL)
558 die (STATE_UNKNOWN,
559 _("Could not realloc() units [%d]\n"), ncommands);
560 }
561 commands[ncommands] = optarg;
562 ncommands++;
563 break;
564 case 'R': /* server responses */
565 if (nresponses >= response_size) {
566 responses = realloc (responses, response_size+8);
567 if (responses == NULL)
568 die (STATE_UNKNOWN,
569 _("Could not realloc() units [%d]\n"), nresponses);
570 }
571 responses[nresponses] = optarg;
572 nresponses++;
573 break;
574 case 'c': /* critical time threshold */
575 if (is_intnonneg (optarg)) {
576 critical_time = atoi (optarg);
577 check_critical_time = TRUE;
578 }
579 else {
580 usage4 (_("Critical time must be a positive integer"));
581 }
582 break;
583 case 'w': /* warning time threshold */
584 if (is_intnonneg (optarg)) {
585 warning_time = atoi (optarg);
586 check_warning_time = TRUE;
587 }
588 else {
589 usage4 (_("Warning time must be a positive integer"));
590 }
591 break;
592 case 'v': /* verbose */
593 verbose++;
594 break;
595 case 't': /* timeout */
596 if (is_intnonneg (optarg)) {
597 socket_timeout = atoi (optarg);
598 }
599 else {
600 usage4 (_("Timeout interval must be a positive integer"));
601 }
602 break;
603 case 'S':
604 /* starttls */
605 use_ssl = TRUE;
606 use_ehlo = TRUE;
607 break;
608 case 'D':
609 /* Check SSL cert validity */
610 #ifdef USE_OPENSSL
611 if (!is_intnonneg (optarg))
612 usage2 ("Invalid certificate expiration period",optarg);
613 days_till_exp = atoi (optarg);
614 check_cert = TRUE;
615 #else
616 usage (_("SSL support not available - install OpenSSL and recompile"));
617 #endif
618 break;
619 case '4':
620 address_family = AF_INET;
621 break;
622 case '6':
623 #ifdef USE_IPV6
624 address_family = AF_INET6;
625 #else
626 usage4 (_("IPv6 support not available"));
627 #endif
628 break;
629 case 'V': /* version */
630 print_revision (progname, revision);
631 exit (STATE_OK);
632 case 'h': /* help */
633 print_help ();
634 exit (STATE_OK);
635 case '?': /* help */
636 usage2 (_("Unknown argument"), optarg);
637 }
638 }
640 c = optind;
641 if (server_address == NULL) {
642 if (argv[c]) {
643 if (is_host (argv[c]))
644 server_address = argv[c];
645 else
646 usage2 (_("Invalid hostname/address"), argv[c]);
647 }
648 else {
649 asprintf (&server_address, "127.0.0.1");
650 }
651 }
653 if (server_expect == NULL)
654 server_expect = strdup (SMTP_EXPECT);
656 if (mail_command == NULL)
657 mail_command = strdup("MAIL ");
659 if (from_arg==NULL)
660 from_arg = strdup(" ");
662 return validate_arguments ();
663 }
667 int
668 validate_arguments (void)
669 {
670 return OK;
671 }
674 int
675 my_close (void)
676 {
677 #ifdef HAVE_SSL
678 np_net_ssl_cleanup();
679 #endif
680 return close(sd);
681 }
684 void
685 print_help (void)
686 {
687 char *myport;
688 asprintf (&myport, "%d", SMTP_PORT);
690 print_revision (progname, revision);
692 printf ("Copyright (c) 1999-2001 Ethan Galstad <nagios@nagios.org>\n");
693 printf (COPYRIGHT, copyright, email);
695 printf("%s\n", _("This plugin will attempt to open an SMTP connection with the host."));
697 printf ("\n\n");
699 print_usage ();
701 printf (_(UT_HELP_VRSN));
703 printf (_(UT_HOST_PORT), 'p', myport);
705 printf (_(UT_IPv46));
707 printf (" %s\n", "-e, --expect=STRING");
708 printf (_("String to expect in first line of server response (default: '%s')"),SMTP_EXPECT);
709 printf (" %s\n\n", "-n, nocommand\n");
710 printf (" %s\n", _("Suppress SMTP command"));
711 printf (" %s\n", "-C, --command=STRING");
712 printf (" %s\n", _("SMTP command (may be used repeatedly)"));
713 printf (" %s\n", "-R, --command=STRING");
714 printf (" %s\n", _("Expected response to command (may be used repeatedly)"));
715 printf (" %s\n", "-f, --from=STRING");
716 printf (" %s\n", _("FROM-address to include in MAIL command, required by Exchange 2000")),
717 #ifdef HAVE_SSL
718 printf (" %s\n", "-D, --certificate=INTEGER");
719 printf (" %s\n", _("Minimum number of days a certificate has to be valid."));
720 printf (" %s\n", "-S, --starttls");
721 printf (" %s\n", _("Use STARTTLS for the connection."));
722 #endif
724 printf (" %s\n", "-A, --authtype=STRING");
725 printf (" %s\n", _("SMTP AUTH type to check (default none, only LOGIN supported)"));
726 printf (" %s\n", "-U, --authuser=STRING");
727 printf (" %s\n", _("SMTP AUTH username"));
728 printf (" %s\n", "-P, --authpass=STRING");
729 printf (" %s\n", _("SMTP AUTH password"));
731 printf (_(UT_WARN_CRIT));
733 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
735 printf (_(UT_VERBOSE));
737 printf ("%s\n", _("Successul connects return STATE_OK, refusals and timeouts return"));
738 printf ("%s\n", _("STATE_CRITICAL, other errors return STATE_UNKNOWN. Successful"));
739 printf ("%s\n", _("connects, but incorrect reponse messages from the host result in"));
740 printf ("%s\n", _("STATE_WARNING return values."));
742 printf (_(UT_SUPPORT));
743 }
747 void
748 print_usage (void)
749 {
750 printf (_("Usage:"));
751 printf ("%s -H host [-p port] [-e expect] [-C command] [-f from addr]\n\
752 [-A authtype -U authuser -P authpass]\n\
753 [-w warn] [-c crit] [-t timeout] [-S] [-D days] [-n] [-v] [-4|-6]\n", progname);
754 }