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 * This plugin will attempt to open an SMTP connection with the host.
15 *
16 *
17 * License Information:
18 *
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 *
33 *
34 * $Id$
35 *
36 ******************************************************************************/
38 const char *progname = "check_smtp";
39 const char *revision = "$Revision$";
40 const char *copyright = "2000-2006";
41 const char *email = "nagiosplug-devel@lists.sourceforge.net";
43 #include "common.h"
44 #include "netutils.h"
45 #include "utils.h"
47 #ifdef HAVE_SSL
48 int check_cert = FALSE;
49 int days_till_exp;
50 # define my_recv(buf, len) ((use_ssl && ssl_established) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
51 # define my_send(buf, len) ((use_ssl && ssl_established) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
52 #else /* ifndef HAVE_SSL */
53 # define my_recv(buf, len) read(sd, buf, len)
54 # define my_send(buf, len) send(sd, buf, len, 0)
55 #endif
57 enum {
58 SMTP_PORT = 25
59 };
60 #define SMTP_EXPECT "220"
61 #define SMTP_HELO "HELO "
62 #define SMTP_EHLO "EHLO "
63 #define SMTP_QUIT "QUIT\r\n"
64 #define SMTP_STARTTLS "STARTTLS\r\n"
65 #define SMTP_AUTH_LOGIN "AUTH LOGIN\r\n"
67 #ifndef HOST_MAX_BYTES
68 #define HOST_MAX_BYTES 255
69 #endif
71 #define EHLO_SUPPORTS_STARTTLS 1
73 int process_arguments (int, char **);
74 int validate_arguments (void);
75 void print_help (void);
76 void print_usage (void);
77 int my_close(void);
79 #include "regex.h"
80 char regex_expect[MAX_INPUT_BUFFER] = "";
81 regex_t preg;
82 regmatch_t pmatch[10];
83 char timestamp[20] = "";
84 char errbuf[MAX_INPUT_BUFFER];
85 int cflags = REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
86 int eflags = 0;
87 int errcode, excode;
89 int server_port = SMTP_PORT;
90 char *server_address = NULL;
91 char *server_expect = NULL;
92 int smtp_use_dummycmd = 0;
93 char *mail_command = NULL;
94 char *from_arg = NULL;
95 int ncommands=0;
96 int command_size=0;
97 int nresponses=0;
98 int response_size=0;
99 char **commands = NULL;
100 char **responses = NULL;
101 char *authtype = NULL;
102 char *authuser = NULL;
103 char *authpass = NULL;
104 int warning_time = 0;
105 int check_warning_time = FALSE;
106 int critical_time = 0;
107 int check_critical_time = FALSE;
108 int verbose = 0;
109 int use_ssl = FALSE;
110 short use_ehlo = FALSE;
111 short ssl_established = 0;
112 char *localhostname = NULL;
113 int sd;
114 char buffer[MAX_INPUT_BUFFER];
115 enum {
116 TCP_PROTOCOL = 1,
117 UDP_PROTOCOL = 2,
118 MAXBUF = 1024
119 };
121 /* written by lauri alanko */
122 static char *
123 base64 (const char *bin, size_t len)
124 {
126 char *buf = (char *) malloc ((len + 2) / 3 * 4 + 1);
127 size_t i = 0, j = 0;
129 char BASE64_END = '=';
130 char base64_table[64];
131 strncpy (base64_table, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/", 64);
133 while (j < len - 2) {
134 buf[i++] = base64_table[bin[j] >> 2];
135 buf[i++] = base64_table[((bin[j] & 3) << 4) | (bin[j + 1] >> 4)];
136 buf[i++] = base64_table[((bin[j + 1] & 15) << 2) | (bin[j + 2] >> 6)];
137 buf[i++] = base64_table[bin[j + 2] & 63];
138 j += 3;
139 }
141 switch (len - j) {
142 case 1:
143 buf[i++] = base64_table[bin[j] >> 2];
144 buf[i++] = base64_table[(bin[j] & 3) << 4];
145 buf[i++] = BASE64_END;
146 buf[i++] = BASE64_END;
147 break;
148 case 2:
149 buf[i++] = base64_table[bin[j] >> 2];
150 buf[i++] = base64_table[((bin[j] & 3) << 4) | (bin[j + 1] >> 4)];
151 buf[i++] = base64_table[(bin[j + 1] & 15) << 2];
152 buf[i++] = BASE64_END;
153 break;
154 case 0:
155 break;
156 }
158 buf[i] = '\0';
159 return buf;
160 }
162 int
163 main (int argc, char **argv)
164 {
165 short supports_tls=FALSE;
166 int n = 0;
167 double elapsed_time;
168 long microsec;
169 int result = STATE_UNKNOWN;
170 char *cmd_str = NULL;
171 char *helocmd = NULL;
172 char *error_msg = NULL;
173 struct timeval tv;
174 struct hostent *hp;
176 setlocale (LC_ALL, "");
177 bindtextdomain (PACKAGE, LOCALEDIR);
178 textdomain (PACKAGE);
180 if (process_arguments (argc, argv) == ERROR)
181 usage4 (_("Could not parse arguments"));
183 /* initialize the HELO command with the localhostname */
184 if(! localhostname){
185 localhostname = malloc (HOST_MAX_BYTES);
186 if(!localhostname){
187 printf(_("malloc() failed!\n"));
188 return STATE_CRITICAL;
189 }
190 if(gethostname(localhostname, HOST_MAX_BYTES)){
191 printf(_("gethostname() failed!\n"));
192 return STATE_CRITICAL;
193 }
194 hp = gethostbyname(localhostname);
195 if(!hp) helocmd = localhostname;
196 else helocmd = hp->h_name;
197 } else {
198 helocmd = localhostname;
199 }
200 if(use_ehlo)
201 asprintf (&helocmd, "%s%s%s", SMTP_EHLO, helocmd, "\r\n");
202 else
203 asprintf (&helocmd, "%s%s%s", SMTP_HELO, helocmd, "\r\n");
205 /* initialize the MAIL command with optional FROM command */
206 asprintf (&cmd_str, "%sFROM: %s%s", mail_command, from_arg, "\r\n");
208 if (verbose && smtp_use_dummycmd)
209 printf ("FROM CMD: %s", cmd_str);
211 /* initialize alarm signal handling */
212 (void) signal (SIGALRM, socket_timeout_alarm_handler);
214 /* set socket timeout */
215 (void) alarm (socket_timeout);
217 /* start timer */
218 gettimeofday (&tv, NULL);
220 /* try to connect to the host at the given port number */
221 result = my_tcp_connect (server_address, server_port, &sd);
223 if (result == STATE_OK) { /* we connected */
225 /* watch for the SMTP connection string and */
226 /* return a WARNING status if we couldn't read any data */
227 if (recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0) == -1) {
228 printf (_("recv() failed\n"));
229 result = STATE_WARNING;
230 }
231 else {
232 if (verbose)
233 printf ("%s", buffer);
234 /* strip the buffer of carriage returns */
235 strip (buffer);
236 /* make sure we find the response we are looking for */
237 if (!strstr (buffer, server_expect)) {
238 if (server_port == SMTP_PORT)
239 printf (_("Invalid SMTP response received from host\n"));
240 else
241 printf (_("Invalid SMTP response received from host on port %d\n"),
242 server_port);
243 result = STATE_WARNING;
244 }
245 }
247 /* send the HELO/EHLO command */
248 send(sd, helocmd, strlen(helocmd), 0);
250 /* allow for response to helo command to reach us */
251 if(read (sd, buffer, MAXBUF - 1) < 0){
252 printf (_("recv() failed\n"));
253 return STATE_WARNING;
254 } else if(use_ehlo){
255 buffer[MAXBUF-1]='\0';
256 if(strstr(buffer, "250 STARTTLS") != NULL ||
257 strstr(buffer, "250-STARTTLS") != NULL){
258 supports_tls=TRUE;
259 }
260 }
262 if(use_ssl && ! supports_tls){
263 printf(_("WARNING - TLS not supported by server\n"));
264 send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0);
265 return STATE_WARNING;
266 }
268 #ifdef HAVE_SSL
269 if(use_ssl) {
270 /* send the STARTTLS command */
271 send(sd, SMTP_STARTTLS, strlen(SMTP_STARTTLS), 0);
273 recv(sd,buffer, MAX_INPUT_BUFFER-1, 0); /* wait for it */
274 if (!strstr (buffer, server_expect)) {
275 printf (_("Server does not support STARTTLS\n"));
276 send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0);
277 return STATE_UNKNOWN;
278 }
279 result = np_net_ssl_init(sd);
280 if(result != STATE_OK) {
281 printf (_("CRITICAL - Cannot create SSL context.\n"));
282 np_net_ssl_cleanup();
283 close(sd);
284 return STATE_CRITICAL;
285 } else {
286 ssl_established = 1;
287 }
289 /*
290 * Resend the EHLO command.
291 *
292 * RFC 3207 (4.2) says: ``The client MUST discard any knowledge
293 * obtained from the server, such as the list of SMTP service
294 * extensions, which was not obtained from the TLS negotiation
295 * itself. The client SHOULD send an EHLO command as the first
296 * command after a successful TLS negotiation.'' For this
297 * reason, some MTAs will not allow an AUTH LOGIN command before
298 * we resent EHLO via TLS.
299 */
300 if (my_send(helocmd, strlen(helocmd)) <= 0) {
301 printf(_("SMTP UNKNOWN - Cannot send EHLO command via TLS.\n"));
302 my_close();
303 return STATE_UNKNOWN;
304 }
305 if (verbose)
306 printf(_("sent %s"), helocmd);
307 if ((n = my_recv(buffer, MAX_INPUT_BUFFER - 1)) <= 0) {
308 printf(_("SMTP UNKNOWN - Cannot read EHLO response via TLS.\n"));
309 my_close();
310 return STATE_UNKNOWN;
311 }
312 if (verbose) {
313 buffer[n] = '\0';
314 printf("%s", buffer);
315 }
317 # ifdef USE_OPENSSL
318 if ( check_cert ) {
319 result = np_net_ssl_check_cert(days_till_exp);
320 if(result != STATE_OK){
321 printf (_("CRITICAL - Cannot retrieve server certificate.\n"));
322 }
323 my_close();
324 return result;
325 }
326 # endif /* USE_OPENSSL */
327 }
328 #endif
330 /* sendmail will syslog a "NOQUEUE" error if session does not attempt
331 * to do something useful. This can be prevented by giving a command
332 * even if syntax is illegal (MAIL requires a FROM:<...> argument)
333 *
334 * According to rfc821 you can include a null reversepath in the from command
335 * - but a log message is generated on the smtp server.
336 *
337 * You can disable sending mail_command with '--nocommand'
338 * Use the -f option to provide a FROM address
339 */
340 if (smtp_use_dummycmd) {
341 my_send(cmd_str, strlen(cmd_str));
342 my_recv(buffer, MAX_INPUT_BUFFER-1);
343 if (verbose)
344 printf("%s", buffer);
345 }
347 while (n < ncommands) {
348 asprintf (&cmd_str, "%s%s", commands[n], "\r\n");
349 my_send(cmd_str, strlen(cmd_str));
350 my_recv(buffer, MAX_INPUT_BUFFER-1);
351 if (verbose)
352 printf("%s", buffer);
353 strip (buffer);
354 if (n < nresponses) {
355 cflags |= REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
356 errcode = regcomp (&preg, responses[n], cflags);
357 if (errcode != 0) {
358 regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
359 printf (_("Could Not Compile Regular Expression"));
360 return ERROR;
361 }
362 excode = regexec (&preg, buffer, 10, pmatch, eflags);
363 if (excode == 0) {
364 result = STATE_OK;
365 }
366 else if (excode == REG_NOMATCH) {
367 result = STATE_WARNING;
368 printf (_("SMTP %s - Invalid response '%s' to command '%s'\n"), state_text (result), buffer, commands[n]);
369 }
370 else {
371 regerror (excode, &preg, errbuf, MAX_INPUT_BUFFER);
372 printf (_("Execute Error: %s\n"), errbuf);
373 result = STATE_UNKNOWN;
374 }
375 }
376 n++;
377 }
379 if (authtype != NULL) {
380 if (strcmp (authtype, "LOGIN") == 0) {
381 char *abuf;
382 int ret;
383 do {
384 if (authuser == NULL) {
385 result = STATE_CRITICAL;
386 error_msg = _("no authuser specified, ");
387 break;
388 }
389 if (authpass == NULL) {
390 result = STATE_CRITICAL;
391 error_msg = _("no authpass specified, ");
392 break;
393 }
395 /* send AUTH LOGIN */
396 my_send(SMTP_AUTH_LOGIN, strlen(SMTP_AUTH_LOGIN));
397 if (verbose)
398 printf (_("sent %s\n"), "AUTH LOGIN");
400 if((ret = my_recv(buffer, MAXBUF - 1)) < 0){
401 error_msg = _("recv() failed after AUTH LOGIN, \n");
402 result = STATE_WARNING;
403 break;
404 }
405 buffer[ret] = 0;
406 if (verbose)
407 printf (_("received %s\n"), buffer);
409 if (strncmp (buffer, "334", 3) != 0) {
410 result = STATE_CRITICAL;
411 error_msg = _("invalid response received after AUTH LOGIN, ");
412 break;
413 }
415 /* encode authuser with base64 */
416 abuf = base64 (authuser, strlen(authuser));
417 strcat (abuf, "\r\n");
418 my_send(abuf, strlen(abuf));
419 if (verbose)
420 printf (_("sent %s\n"), abuf);
422 if ((ret = my_recv(buffer, MAX_INPUT_BUFFER-1)) == -1) {
423 result = STATE_CRITICAL;
424 error_msg = _("recv() failed after sending authuser, ");
425 break;
426 }
427 buffer[ret] = 0;
428 if (verbose) {
429 printf (_("received %s\n"), buffer);
430 }
431 if (strncmp (buffer, "334", 3) != 0) {
432 result = STATE_CRITICAL;
433 error_msg = _("invalid response received after authuser, ");
434 break;
435 }
436 /* encode authpass with base64 */
437 abuf = base64 (authpass, strlen(authpass));
438 strcat (abuf, "\r\n");
439 my_send(abuf, strlen(abuf));
440 if (verbose) {
441 printf (_("sent %s\n"), abuf);
442 }
443 if ((ret = my_recv(buffer, MAX_INPUT_BUFFER-1)) == -1) {
444 result = STATE_CRITICAL;
445 error_msg = _("recv() failed after sending authpass, ");
446 break;
447 }
448 buffer[ret] = 0;
449 if (verbose) {
450 printf (_("received %s\n"), buffer);
451 }
452 if (strncmp (buffer, "235", 3) != 0) {
453 result = STATE_CRITICAL;
454 error_msg = _("invalid response received after authpass, ");
455 break;
456 }
457 break;
458 } while (0);
459 } else {
460 result = STATE_CRITICAL;
461 error_msg = _("only authtype LOGIN is supported, ");
462 }
463 }
465 /* tell the server we're done */
466 my_send (SMTP_QUIT, strlen (SMTP_QUIT));
468 /* finally close the connection */
469 close (sd);
470 }
472 /* reset the alarm */
473 alarm (0);
475 microsec = deltime (tv);
476 elapsed_time = (double)microsec / 1.0e6;
478 if (result == STATE_OK) {
479 if (check_critical_time && elapsed_time > (double) critical_time)
480 result = STATE_CRITICAL;
481 else if (check_warning_time && elapsed_time > (double) warning_time)
482 result = STATE_WARNING;
483 }
485 printf (_("SMTP %s - %s%.3f sec. response time%s%s|%s\n"),
486 state_text (result),
487 (error_msg == NULL ? "" : error_msg),
488 elapsed_time,
489 verbose?", ":"", verbose?buffer:"",
490 fperfdata ("time", elapsed_time, "s",
491 (int)check_warning_time, warning_time,
492 (int)check_critical_time, critical_time,
493 TRUE, 0, FALSE, 0));
495 return result;
496 }
500 /* process command-line arguments */
501 int
502 process_arguments (int argc, char **argv)
503 {
504 int c;
506 int option = 0;
507 static struct option longopts[] = {
508 {"hostname", required_argument, 0, 'H'},
509 {"expect", required_argument, 0, 'e'},
510 {"critical", required_argument, 0, 'c'},
511 {"warning", required_argument, 0, 'w'},
512 {"timeout", required_argument, 0, 't'},
513 {"port", required_argument, 0, 'p'},
514 {"from", required_argument, 0, 'f'},
515 {"fqdn", required_argument, 0, 'F'},
516 {"authtype", required_argument, 0, 'A'},
517 {"authuser", required_argument, 0, 'U'},
518 {"authpass", required_argument, 0, 'P'},
519 {"command", required_argument, 0, 'C'},
520 {"response", required_argument, 0, 'R'},
521 {"nocommand", required_argument, 0, 'n'},
522 {"verbose", no_argument, 0, 'v'},
523 {"version", no_argument, 0, 'V'},
524 {"use-ipv4", no_argument, 0, '4'},
525 {"use-ipv6", no_argument, 0, '6'},
526 {"help", no_argument, 0, 'h'},
527 {"starttls",no_argument,0,'S'},
528 {"certificate",required_argument,0,'D'},
529 {0, 0, 0, 0}
530 };
532 if (argc < 2)
533 return ERROR;
535 for (c = 1; c < argc; c++) {
536 if (strcmp ("-to", argv[c]) == 0)
537 strcpy (argv[c], "-t");
538 else if (strcmp ("-wt", argv[c]) == 0)
539 strcpy (argv[c], "-w");
540 else if (strcmp ("-ct", argv[c]) == 0)
541 strcpy (argv[c], "-c");
542 }
544 while (1) {
545 c = getopt_long (argc, argv, "+hVv46t:p:f:e:c:w:H:C:R:SD:F:A:U:P:",
546 longopts, &option);
548 if (c == -1 || c == EOF)
549 break;
551 switch (c) {
552 case 'H': /* hostname */
553 if (is_host (optarg)) {
554 server_address = optarg;
555 }
556 else {
557 usage2 (_("Invalid hostname/address"), optarg);
558 }
559 break;
560 case 'p': /* port */
561 if (is_intpos (optarg))
562 server_port = atoi (optarg);
563 else
564 usage4 (_("Port must be a positive integer"));
565 break;
566 case 'F':
567 /* localhostname */
568 localhostname = strdup(optarg);
569 break;
570 case 'f': /* from argument */
571 from_arg = optarg;
572 smtp_use_dummycmd = 1;
573 break;
574 case 'A':
575 authtype = optarg;
576 break;
577 case 'U':
578 authuser = optarg;
579 break;
580 case 'P':
581 authpass = optarg;
582 break;
583 case 'e': /* server expect string on 220 */
584 server_expect = optarg;
585 break;
586 case 'C': /* commands */
587 if (ncommands >= command_size) {
588 commands = realloc (commands, command_size+8);
589 if (commands == NULL)
590 die (STATE_UNKNOWN,
591 _("Could not realloc() units [%d]\n"), ncommands);
592 }
593 commands[ncommands] = optarg;
594 ncommands++;
595 break;
596 case 'R': /* server responses */
597 if (nresponses >= response_size) {
598 responses = realloc (responses, response_size+8);
599 if (responses == NULL)
600 die (STATE_UNKNOWN,
601 _("Could not realloc() units [%d]\n"), nresponses);
602 }
603 responses[nresponses] = optarg;
604 nresponses++;
605 break;
606 case 'c': /* critical time threshold */
607 if (is_intnonneg (optarg)) {
608 critical_time = atoi (optarg);
609 check_critical_time = TRUE;
610 }
611 else {
612 usage4 (_("Critical time must be a positive integer"));
613 }
614 break;
615 case 'w': /* warning time threshold */
616 if (is_intnonneg (optarg)) {
617 warning_time = atoi (optarg);
618 check_warning_time = TRUE;
619 }
620 else {
621 usage4 (_("Warning time must be a positive integer"));
622 }
623 break;
624 case 'v': /* verbose */
625 verbose++;
626 break;
627 case 't': /* timeout */
628 if (is_intnonneg (optarg)) {
629 socket_timeout = atoi (optarg);
630 }
631 else {
632 usage4 (_("Timeout interval must be a positive integer"));
633 }
634 break;
635 case 'S':
636 /* starttls */
637 use_ssl = TRUE;
638 use_ehlo = TRUE;
639 break;
640 case 'D':
641 /* Check SSL cert validity */
642 #ifdef USE_OPENSSL
643 if (!is_intnonneg (optarg))
644 usage2 ("Invalid certificate expiration period",optarg);
645 days_till_exp = atoi (optarg);
646 check_cert = TRUE;
647 #else
648 usage (_("SSL support not available - install OpenSSL and recompile"));
649 #endif
650 break;
651 case '4':
652 address_family = AF_INET;
653 break;
654 case '6':
655 #ifdef USE_IPV6
656 address_family = AF_INET6;
657 #else
658 usage4 (_("IPv6 support not available"));
659 #endif
660 break;
661 case 'V': /* version */
662 print_revision (progname, revision);
663 exit (STATE_OK);
664 case 'h': /* help */
665 print_help ();
666 exit (STATE_OK);
667 case '?': /* help */
668 usage2 (_("Unknown argument"), optarg);
669 }
670 }
672 c = optind;
673 if (server_address == NULL) {
674 if (argv[c]) {
675 if (is_host (argv[c]))
676 server_address = argv[c];
677 else
678 usage2 (_("Invalid hostname/address"), argv[c]);
679 }
680 else {
681 asprintf (&server_address, "127.0.0.1");
682 }
683 }
685 if (server_expect == NULL)
686 server_expect = strdup (SMTP_EXPECT);
688 if (mail_command == NULL)
689 mail_command = strdup("MAIL ");
691 if (from_arg==NULL)
692 from_arg = strdup(" ");
694 return validate_arguments ();
695 }
699 int
700 validate_arguments (void)
701 {
702 return OK;
703 }
706 int
707 my_close (void)
708 {
709 #ifdef HAVE_SSL
710 np_net_ssl_cleanup();
711 #endif
712 return close(sd);
713 }
716 void
717 print_help (void)
718 {
719 char *myport;
720 asprintf (&myport, "%d", SMTP_PORT);
722 print_revision (progname, revision);
724 printf ("Copyright (c) 1999-2001 Ethan Galstad <nagios@nagios.org>\n");
725 printf (COPYRIGHT, copyright, email);
727 printf("%s\n", _("This plugin will attempt to open an SMTP connection with the host."));
729 printf ("\n\n");
731 print_usage ();
733 printf (_(UT_HELP_VRSN));
735 printf (_(UT_HOST_PORT), 'p', myport);
737 printf (_(UT_IPv46));
739 printf (" %s\n", "-e, --expect=STRING");
740 printf (_(" String to expect in first line of server response (default: '%s')\n"), SMTP_EXPECT);
741 printf (" %s\n", "-n, nocommand");
742 printf (" %s\n", _("Suppress SMTP command"));
743 printf (" %s\n", "-C, --command=STRING");
744 printf (" %s\n", _("SMTP command (may be used repeatedly)"));
745 printf (" %s\n", "-R, --command=STRING");
746 printf (" %s\n", _("Expected response to command (may be used repeatedly)"));
747 printf (" %s\n", "-f, --from=STRING");
748 printf (" %s\n", _("FROM-address to include in MAIL command, required by Exchange 2000")),
749 #ifdef HAVE_SSL
750 printf (" %s\n", "-D, --certificate=INTEGER");
751 printf (" %s\n", _("Minimum number of days a certificate has to be valid."));
752 printf (" %s\n", "-S, --starttls");
753 printf (" %s\n", _("Use STARTTLS for the connection."));
754 #endif
756 printf (" %s\n", "-A, --authtype=STRING");
757 printf (" %s\n", _("SMTP AUTH type to check (default none, only LOGIN supported)"));
758 printf (" %s\n", "-U, --authuser=STRING");
759 printf (" %s\n", _("SMTP AUTH username"));
760 printf (" %s\n", "-P, --authpass=STRING");
761 printf (" %s\n", _("SMTP AUTH password"));
763 printf (_(UT_WARN_CRIT));
765 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
767 printf (_(UT_VERBOSE));
769 printf("\n");
770 printf ("%s\n", _("Successul connects return STATE_OK, refusals and timeouts return"));
771 printf ("%s\n", _("STATE_CRITICAL, other errors return STATE_UNKNOWN. Successful"));
772 printf ("%s\n", _("connects, but incorrect reponse messages from the host result in"));
773 printf ("%s\n", _("STATE_WARNING return values."));
775 printf (_(UT_SUPPORT));
776 }
780 void
781 print_usage (void)
782 {
783 printf (_("Usage:"));
784 printf ("%s -H host [-p port] [-e expect] [-C command] [-f from addr]", progname);
785 printf ("[-A authtype -U authuser -P authpass] [-w warn] [-c crit] [-t timeout]\n");
786 printf ("[-S] [-D days] [-n] [-v] [-4|-6]\n");
787 }