1 /*****************************************************************************
2 *
3 * Nagios check_http 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_http plugin
13 *
14 * This plugin tests the HTTP service on the specified host. It can test
15 * normal (http) and secure (https) servers, follow redirects, search for
16 * strings and regular expressions, check connection times, and report on
17 * certificate expiration times.
18 *
19 *
20 * This program is free software: you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation, either version 3 of the License, or
23 * (at your option) any later version.
24 *
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
29 *
30 * You should have received a copy of the GNU General Public License
31 * along with this program. If not, see <http://www.gnu.org/licenses/>.
32 *
33 * $Id$
34 *
35 *****************************************************************************/
37 /* splint -I. -I../../plugins -I../../lib/ -I/usr/kerberos/include/ ../../plugins/check_http.c */
39 const char *progname = "check_http";
40 const char *revision = "$Revision$";
41 const char *copyright = "1999-2008";
42 const char *email = "nagiosplug-devel@lists.sourceforge.net";
44 #include "common.h"
45 #include "netutils.h"
46 #include "utils.h"
47 #include "base64.h"
48 #include <ctype.h>
50 #define INPUT_DELIMITER ";"
52 #define HTTP_EXPECT "HTTP/1."
53 enum {
54 MAX_IPV4_HOSTLENGTH = 255,
55 HTTP_PORT = 80,
56 HTTPS_PORT = 443,
57 MAX_PORT = 65535
58 };
60 #ifdef HAVE_SSL
61 int check_cert = FALSE;
62 int days_till_exp;
63 char *randbuff;
64 X509 *server_cert;
65 # define my_recv(buf, len) ((use_ssl) ? np_net_ssl_read(buf, len) : read(sd, buf, len))
66 # define my_send(buf, len) ((use_ssl) ? np_net_ssl_write(buf, len) : send(sd, buf, len, 0))
67 #else /* ifndef HAVE_SSL */
68 # define my_recv(buf, len) read(sd, buf, len)
69 # define my_send(buf, len) send(sd, buf, len, 0)
70 #endif /* HAVE_SSL */
71 int no_body = FALSE;
72 int maximum_age = -1;
74 enum {
75 REGS = 2,
76 MAX_RE_SIZE = 256
77 };
78 #include "regex.h"
79 regex_t preg;
80 regmatch_t pmatch[REGS];
81 char regexp[MAX_RE_SIZE];
82 char errbuf[MAX_INPUT_BUFFER];
83 int cflags = REG_NOSUB | REG_EXTENDED | REG_NEWLINE;
84 int errcode;
85 int invert_regex = 0;
87 struct timeval tv;
89 #define HTTP_URL "/"
90 #define CRLF "\r\n"
92 int specify_port = FALSE;
93 int server_port = HTTP_PORT;
94 char server_port_text[6] = "";
95 char server_type[6] = "http";
96 char *server_address;
97 char *host_name;
98 char *server_url;
99 char *user_agent;
100 int server_url_length;
101 int server_expect_yn = 0;
102 char server_expect[MAX_INPUT_BUFFER] = HTTP_EXPECT;
103 char string_expect[MAX_INPUT_BUFFER] = "";
104 double warning_time = 0;
105 int check_warning_time = FALSE;
106 double critical_time = 0;
107 int check_critical_time = FALSE;
108 char user_auth[MAX_INPUT_BUFFER] = "";
109 int display_html = FALSE;
110 char **http_opt_headers;
111 int http_opt_headers_count = 0;
112 int onredirect = STATE_OK;
113 int use_ssl = FALSE;
114 int verbose = FALSE;
115 int sd;
116 int min_page_len = 0;
117 int max_page_len = 0;
118 int redir_depth = 0;
119 int max_depth = 15;
120 char *http_method;
121 char *http_post_data;
122 char *http_content_type;
123 char buffer[MAX_INPUT_BUFFER];
125 int process_arguments (int, char **);
126 int check_http (void);
127 void redir (char *pos, char *status_line);
128 int server_type_check(const char *type);
129 int server_port_check(int ssl_flag);
130 char *perfd_time (double microsec);
131 char *perfd_size (int page_len);
132 void print_help (void);
133 void print_usage (void);
135 int
136 main (int argc, char **argv)
137 {
138 int result = STATE_UNKNOWN;
140 setlocale (LC_ALL, "");
141 bindtextdomain (PACKAGE, LOCALEDIR);
142 textdomain (PACKAGE);
144 /* Set default URL. Must be malloced for subsequent realloc if --onredirect=follow */
145 server_url = strdup(HTTP_URL);
146 server_url_length = strlen(server_url);
147 asprintf (&user_agent, "User-Agent: check_http/%s (nagios-plugins %s)",
148 clean_revstring (revision), VERSION);
150 /* Parse extra opts if any */
151 argv=np_extra_opts (&argc, argv, progname);
153 if (process_arguments (argc, argv) == ERROR)
154 usage4 (_("Could not parse arguments"));
156 if (display_html == TRUE)
157 printf ("<A HREF=\"%s://%s:%d%s\" target=\"_blank\">",
158 use_ssl ? "https" : "http", host_name ? host_name : server_address,
159 server_port, server_url);
161 /* initialize alarm signal handling, set socket timeout, start timer */
162 (void) signal (SIGALRM, socket_timeout_alarm_handler);
163 (void) alarm (socket_timeout);
164 gettimeofday (&tv, NULL);
166 result = check_http ();
167 return result;
168 }
172 /* process command-line arguments */
173 int
174 process_arguments (int argc, char **argv)
175 {
176 int c = 1;
177 char *p;
179 enum {
180 INVERT_REGEX = CHAR_MAX + 1
181 };
183 int option = 0;
184 static struct option longopts[] = {
185 STD_LONG_OPTS,
186 {"link", no_argument, 0, 'L'},
187 {"nohtml", no_argument, 0, 'n'},
188 {"ssl", no_argument, 0, 'S'},
189 {"post", required_argument, 0, 'P'},
190 {"IP-address", required_argument, 0, 'I'},
191 {"url", required_argument, 0, 'u'},
192 {"port", required_argument, 0, 'p'},
193 {"authorization", required_argument, 0, 'a'},
194 {"string", required_argument, 0, 's'},
195 {"expect", required_argument, 0, 'e'},
196 {"regex", required_argument, 0, 'r'},
197 {"ereg", required_argument, 0, 'r'},
198 {"eregi", required_argument, 0, 'R'},
199 {"linespan", no_argument, 0, 'l'},
200 {"onredirect", required_argument, 0, 'f'},
201 {"certificate", required_argument, 0, 'C'},
202 {"useragent", required_argument, 0, 'A'},
203 {"header", required_argument, 0, 'k'},
204 {"no-body", no_argument, 0, 'N'},
205 {"max-age", required_argument, 0, 'M'},
206 {"content-type", required_argument, 0, 'T'},
207 {"pagesize", required_argument, 0, 'm'},
208 {"invert-regex", no_argument, NULL, INVERT_REGEX},
209 {"use-ipv4", no_argument, 0, '4'},
210 {"use-ipv6", no_argument, 0, '6'},
211 {0, 0, 0, 0}
212 };
214 if (argc < 2)
215 return ERROR;
217 for (c = 1; c < argc; c++) {
218 if (strcmp ("-to", argv[c]) == 0)
219 strcpy (argv[c], "-t");
220 if (strcmp ("-hn", argv[c]) == 0)
221 strcpy (argv[c], "-H");
222 if (strcmp ("-wt", argv[c]) == 0)
223 strcpy (argv[c], "-w");
224 if (strcmp ("-ct", argv[c]) == 0)
225 strcpy (argv[c], "-c");
226 if (strcmp ("-nohtml", argv[c]) == 0)
227 strcpy (argv[c], "-n");
228 }
230 while (1) {
231 c = getopt_long (argc, argv, "Vvh46t:c:w:A:k:H:P:T:I:a:e:p:s:R:r:u:f:C:nlLSm:M:N", longopts, &option);
232 if (c == -1 || c == EOF)
233 break;
235 switch (c) {
236 case '?': /* usage */
237 usage5 ();
238 break;
239 case 'h': /* help */
240 print_help ();
241 exit (STATE_OK);
242 break;
243 case 'V': /* version */
244 print_revision (progname, revision);
245 exit (STATE_OK);
246 break;
247 case 't': /* timeout period */
248 if (!is_intnonneg (optarg))
249 usage2 (_("Timeout interval must be a positive integer"), optarg);
250 else
251 socket_timeout = atoi (optarg);
252 break;
253 case 'c': /* critical time threshold */
254 if (!is_nonnegative (optarg))
255 usage2 (_("Critical threshold must be integer"), optarg);
256 else {
257 critical_time = strtod (optarg, NULL);
258 check_critical_time = TRUE;
259 }
260 break;
261 case 'w': /* warning time threshold */
262 if (!is_nonnegative (optarg))
263 usage2 (_("Warning threshold must be integer"), optarg);
264 else {
265 warning_time = strtod (optarg, NULL);
266 check_warning_time = TRUE;
267 }
268 break;
269 case 'A': /* User Agent String */
270 asprintf (&user_agent, "User-Agent: %s", optarg);
271 break;
272 case 'k': /* Additional headers */
273 if (http_opt_headers_count == 0)
274 http_opt_headers = malloc (sizeof (char *) * (++http_opt_headers_count));
275 else
276 http_opt_headers = realloc (http_opt_headers, sizeof (char *) * (++http_opt_headers_count));
277 http_opt_headers[http_opt_headers_count - 1] = optarg;
278 /* asprintf (&http_opt_headers, "%s", optarg); */
279 break;
280 case 'L': /* show html link */
281 display_html = TRUE;
282 break;
283 case 'n': /* do not show html link */
284 display_html = FALSE;
285 break;
286 case 'C': /* Check SSL cert validity */
287 #ifdef HAVE_SSL
288 if (!is_intnonneg (optarg))
289 usage2 (_("Invalid certificate expiration period"), optarg);
290 else {
291 days_till_exp = atoi (optarg);
292 check_cert = TRUE;
293 }
294 /* Fall through to -S option */
295 #endif
296 case 'S': /* use SSL */
297 #ifndef HAVE_SSL
298 usage4 (_("Invalid option - SSL is not available"));
299 #endif
300 use_ssl = TRUE;
301 if (specify_port == FALSE)
302 server_port = HTTPS_PORT;
303 break;
304 case 'f': /* onredirect */
305 if (!strcmp (optarg, "follow"))
306 onredirect = STATE_DEPENDENT;
307 if (!strcmp (optarg, "unknown"))
308 onredirect = STATE_UNKNOWN;
309 if (!strcmp (optarg, "ok"))
310 onredirect = STATE_OK;
311 if (!strcmp (optarg, "warning"))
312 onredirect = STATE_WARNING;
313 if (!strcmp (optarg, "critical"))
314 onredirect = STATE_CRITICAL;
315 if (verbose)
316 printf(_("option f:%d \n"), onredirect);
317 break;
318 /* Note: H, I, and u must be malloc'd or will fail on redirects */
319 case 'H': /* Host Name (virtual host) */
320 host_name = strdup (optarg);
321 if (host_name[0] == '[') {
322 if ((p = strstr (host_name, "]:")) != NULL) /* [IPv6]:port */
323 server_port = atoi (p + 2);
324 } else if ((p = strchr (host_name, ':')) != NULL
325 && strchr (++p, ':') == NULL) /* IPv4:port or host:port */
326 server_port = atoi (p);
327 break;
328 case 'I': /* Server IP-address */
329 server_address = strdup (optarg);
330 break;
331 case 'u': /* URL path */
332 server_url = strdup (optarg);
333 server_url_length = strlen (server_url);
334 break;
335 case 'p': /* Server port */
336 if (!is_intnonneg (optarg))
337 usage2 (_("Invalid port number"), optarg);
338 else {
339 server_port = atoi (optarg);
340 specify_port = TRUE;
341 }
342 break;
343 case 'a': /* authorization info */
344 strncpy (user_auth, optarg, MAX_INPUT_BUFFER - 1);
345 user_auth[MAX_INPUT_BUFFER - 1] = 0;
346 break;
347 case 'P': /* HTTP POST data in URL encoded format */
348 if (http_method || http_post_data) break;
349 http_method = strdup("POST");
350 http_post_data = strdup (optarg);
351 break;
352 case 's': /* string or substring */
353 strncpy (string_expect, optarg, MAX_INPUT_BUFFER - 1);
354 string_expect[MAX_INPUT_BUFFER - 1] = 0;
355 break;
356 case 'e': /* string or substring */
357 strncpy (server_expect, optarg, MAX_INPUT_BUFFER - 1);
358 server_expect[MAX_INPUT_BUFFER - 1] = 0;
359 server_expect_yn = 1;
360 break;
361 case 'T': /* Content-type */
362 asprintf (&http_content_type, "%s", optarg);
363 break;
364 case 'l': /* linespan */
365 cflags &= ~REG_NEWLINE;
366 break;
367 case 'R': /* regex */
368 cflags |= REG_ICASE;
369 case 'r': /* regex */
370 strncpy (regexp, optarg, MAX_RE_SIZE - 1);
371 regexp[MAX_RE_SIZE - 1] = 0;
372 errcode = regcomp (&preg, regexp, cflags);
373 if (errcode != 0) {
374 (void) regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
375 printf (_("Could Not Compile Regular Expression: %s"), errbuf);
376 return ERROR;
377 }
378 break;
379 case INVERT_REGEX:
380 invert_regex = 1;
381 break;
382 case '4':
383 address_family = AF_INET;
384 break;
385 case '6':
386 #ifdef USE_IPV6
387 address_family = AF_INET6;
388 #else
389 usage4 (_("IPv6 support not available"));
390 #endif
391 break;
392 case 'v': /* verbose */
393 verbose = TRUE;
394 break;
395 case 'm': /* min_page_length */
396 {
397 char *tmp;
398 if (strchr(optarg, ':') != (char *)NULL) {
399 /* range, so get two values, min:max */
400 tmp = strtok(optarg, ":");
401 if (tmp == NULL) {
402 printf("Bad format: try \"-m min:max\"\n");
403 exit (STATE_WARNING);
404 } else
405 min_page_len = atoi(tmp);
407 tmp = strtok(NULL, ":");
408 if (tmp == NULL) {
409 printf("Bad format: try \"-m min:max\"\n");
410 exit (STATE_WARNING);
411 } else
412 max_page_len = atoi(tmp);
413 } else
414 min_page_len = atoi (optarg);
415 break;
416 }
417 case 'N': /* no-body */
418 no_body = TRUE;
419 break;
420 case 'M': /* max-age */
421 {
422 int L = strlen(optarg);
423 if (L && optarg[L-1] == 'm')
424 maximum_age = atoi (optarg) * 60;
425 else if (L && optarg[L-1] == 'h')
426 maximum_age = atoi (optarg) * 60 * 60;
427 else if (L && optarg[L-1] == 'd')
428 maximum_age = atoi (optarg) * 60 * 60 * 24;
429 else if (L && (optarg[L-1] == 's' ||
430 isdigit (optarg[L-1])))
431 maximum_age = atoi (optarg);
432 else {
433 fprintf (stderr, "unparsable max-age: %s\n", optarg);
434 exit (STATE_WARNING);
435 }
436 }
437 break;
438 }
439 }
441 c = optind;
443 if (server_address == NULL && c < argc)
444 server_address = strdup (argv[c++]);
446 if (host_name == NULL && c < argc)
447 host_name = strdup (argv[c++]);
449 if (server_address == NULL) {
450 if (host_name == NULL)
451 usage4 (_("You must specify a server address or host name"));
452 else
453 server_address = strdup (host_name);
454 }
456 if (check_critical_time && critical_time>(double)socket_timeout)
457 socket_timeout = (int)critical_time + 1;
459 if (http_method == NULL)
460 http_method = strdup ("GET");
462 return TRUE;
463 }
467 /* Returns 1 if we're done processing the document body; 0 to keep going */
468 static int
469 document_headers_done (char *full_page)
470 {
471 const char *body;
473 for (body = full_page; *body; body++) {
474 if (!strncmp (body, "\n\n", 2) || !strncmp (body, "\n\r\n", 3))
475 break;
476 }
478 if (!*body)
479 return 0; /* haven't read end of headers yet */
481 full_page[body - full_page] = 0;
482 return 1;
483 }
485 static time_t
486 parse_time_string (const char *string)
487 {
488 struct tm tm;
489 time_t t;
490 memset (&tm, 0, sizeof(tm));
492 /* Like this: Tue, 25 Dec 2001 02:59:03 GMT */
494 if (isupper (string[0]) && /* Tue */
495 islower (string[1]) &&
496 islower (string[2]) &&
497 ',' == string[3] &&
498 ' ' == string[4] &&
499 (isdigit(string[5]) || string[5] == ' ') && /* 25 */
500 isdigit (string[6]) &&
501 ' ' == string[7] &&
502 isupper (string[8]) && /* Dec */
503 islower (string[9]) &&
504 islower (string[10]) &&
505 ' ' == string[11] &&
506 isdigit (string[12]) && /* 2001 */
507 isdigit (string[13]) &&
508 isdigit (string[14]) &&
509 isdigit (string[15]) &&
510 ' ' == string[16] &&
511 isdigit (string[17]) && /* 02: */
512 isdigit (string[18]) &&
513 ':' == string[19] &&
514 isdigit (string[20]) && /* 59: */
515 isdigit (string[21]) &&
516 ':' == string[22] &&
517 isdigit (string[23]) && /* 03 */
518 isdigit (string[24]) &&
519 ' ' == string[25] &&
520 'G' == string[26] && /* GMT */
521 'M' == string[27] && /* GMT */
522 'T' == string[28]) {
524 tm.tm_sec = 10 * (string[23]-'0') + (string[24]-'0');
525 tm.tm_min = 10 * (string[20]-'0') + (string[21]-'0');
526 tm.tm_hour = 10 * (string[17]-'0') + (string[18]-'0');
527 tm.tm_mday = 10 * (string[5] == ' ' ? 0 : string[5]-'0') + (string[6]-'0');
528 tm.tm_mon = (!strncmp (string+8, "Jan", 3) ? 0 :
529 !strncmp (string+8, "Feb", 3) ? 1 :
530 !strncmp (string+8, "Mar", 3) ? 2 :
531 !strncmp (string+8, "Apr", 3) ? 3 :
532 !strncmp (string+8, "May", 3) ? 4 :
533 !strncmp (string+8, "Jun", 3) ? 5 :
534 !strncmp (string+8, "Jul", 3) ? 6 :
535 !strncmp (string+8, "Aug", 3) ? 7 :
536 !strncmp (string+8, "Sep", 3) ? 8 :
537 !strncmp (string+8, "Oct", 3) ? 9 :
538 !strncmp (string+8, "Nov", 3) ? 10 :
539 !strncmp (string+8, "Dec", 3) ? 11 :
540 -1);
541 tm.tm_year = ((1000 * (string[12]-'0') +
542 100 * (string[13]-'0') +
543 10 * (string[14]-'0') +
544 (string[15]-'0'))
545 - 1900);
547 tm.tm_isdst = 0; /* GMT is never in DST, right? */
549 if (tm.tm_mon < 0 || tm.tm_mday < 1 || tm.tm_mday > 31)
550 return 0;
552 /*
553 This is actually wrong: we need to subtract the local timezone
554 offset from GMT from this value. But, that's ok in this usage,
555 because we only comparing these two GMT dates against each other,
556 so it doesn't matter what time zone we parse them in.
557 */
559 t = mktime (&tm);
560 if (t == (time_t) -1) t = 0;
562 if (verbose) {
563 const char *s = string;
564 while (*s && *s != '\r' && *s != '\n')
565 fputc (*s++, stdout);
566 printf (" ==> %lu\n", (unsigned long) t);
567 }
569 return t;
571 } else {
572 return 0;
573 }
574 }
578 static void
579 check_document_dates (const char *headers)
580 {
581 const char *s;
582 char *server_date = 0;
583 char *document_date = 0;
585 s = headers;
586 while (*s) {
587 const char *field = s;
588 const char *value = 0;
590 /* Find the end of the header field */
591 while (*s && !isspace(*s) && *s != ':')
592 s++;
594 /* Remember the header value, if any. */
595 if (*s == ':')
596 value = ++s;
598 /* Skip to the end of the header, including continuation lines. */
599 while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
600 s++;
601 s++;
603 /* Process this header. */
604 if (value && value > field+2) {
605 char *ff = (char *) malloc (value-field);
606 char *ss = ff;
607 while (field < value-1)
608 *ss++ = tolower(*field++);
609 *ss++ = 0;
611 if (!strcmp (ff, "date") || !strcmp (ff, "last-modified")) {
612 const char *e;
613 while (*value && isspace (*value))
614 value++;
615 for (e = value; *e && *e != '\r' && *e != '\n'; e++)
616 ;
617 ss = (char *) malloc (e - value + 1);
618 strncpy (ss, value, e - value);
619 ss[e - value] = 0;
620 if (!strcmp (ff, "date")) {
621 if (server_date) free (server_date);
622 server_date = ss;
623 } else {
624 if (document_date) free (document_date);
625 document_date = ss;
626 }
627 }
628 free (ff);
629 }
630 }
632 /* Done parsing the body. Now check the dates we (hopefully) parsed. */
633 if (!server_date || !*server_date) {
634 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Server date unknown\n"));
635 } else if (!document_date || !*document_date) {
636 die (STATE_CRITICAL, _("HTTP CRITICAL - Document modification date unknown\n"));
637 } else {
638 time_t srv_data = parse_time_string (server_date);
639 time_t doc_data = parse_time_string (document_date);
641 if (srv_data <= 0) {
642 die (STATE_CRITICAL, _("HTTP CRITICAL - Server date \"%100s\" unparsable"), server_date);
643 } else if (doc_data <= 0) {
644 die (STATE_CRITICAL, _("HTTP CRITICAL - Document date \"%100s\" unparsable"), document_date);
645 } else if (doc_data > srv_data + 30) {
646 die (STATE_CRITICAL, _("HTTP CRITICAL - Document is %d seconds in the future\n"), (int)doc_data - (int)srv_data);
647 } else if (doc_data < srv_data - maximum_age) {
648 int n = (srv_data - doc_data);
649 if (n > (60 * 60 * 24 * 2))
650 die (STATE_CRITICAL,
651 _("HTTP CRITICAL - Last modified %.1f days ago\n"),
652 ((float) n) / (60 * 60 * 24));
653 else
654 die (STATE_CRITICAL,
655 _("HTTP CRITICAL - Last modified %d:%02d:%02d ago\n"),
656 n / (60 * 60), (n / 60) % 60, n % 60);
657 }
659 free (server_date);
660 free (document_date);
661 }
662 }
664 int
665 get_content_length (const char *headers)
666 {
667 const char *s;
668 int content_length = 0;
670 s = headers;
671 while (*s) {
672 const char *field = s;
673 const char *value = 0;
675 /* Find the end of the header field */
676 while (*s && !isspace(*s) && *s != ':')
677 s++;
679 /* Remember the header value, if any. */
680 if (*s == ':')
681 value = ++s;
683 /* Skip to the end of the header, including continuation lines. */
684 while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
685 s++;
686 s++;
688 /* Process this header. */
689 if (value && value > field+2) {
690 char *ff = (char *) malloc (value-field);
691 char *ss = ff;
692 while (field < value-1)
693 *ss++ = tolower(*field++);
694 *ss++ = 0;
696 if (!strcmp (ff, "content-length")) {
697 const char *e;
698 while (*value && isspace (*value))
699 value++;
700 for (e = value; *e && *e != '\r' && *e != '\n'; e++)
701 ;
702 ss = (char *) malloc (e - value + 1);
703 strncpy (ss, value, e - value);
704 ss[e - value] = 0;
705 content_length = atoi(ss);
706 free (ss);
707 }
708 free (ff);
709 }
710 }
711 return (content_length);
712 }
714 int
715 check_http (void)
716 {
717 char *msg;
718 char *status_line;
719 char *status_code;
720 char *header;
721 char *page;
722 char *auth;
723 int http_status;
724 int i = 0;
725 size_t pagesize = 0;
726 char *full_page;
727 char *buf;
728 char *pos;
729 long microsec;
730 double elapsed_time;
731 int page_len = 0;
732 int result = STATE_UNKNOWN;
734 /* try to connect to the host at the given port number */
735 if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
736 die (STATE_CRITICAL, _("HTTP CRITICAL - Unable to open TCP socket\n"));
737 #ifdef HAVE_SSL
738 if (use_ssl == TRUE) {
739 np_net_ssl_init(sd);
740 if (check_cert == TRUE) {
741 result = np_net_ssl_check_cert(days_till_exp);
742 np_net_ssl_cleanup();
743 if(sd) close(sd);
744 return result;
745 }
746 }
747 #endif /* HAVE_SSL */
749 asprintf (&buf, "%s %s HTTP/1.0\r\n%s\r\n", http_method, server_url, user_agent);
751 /* tell HTTP/1.1 servers not to keep the connection alive */
752 asprintf (&buf, "%sConnection: close\r\n", buf);
754 /* optionally send the host header info */
755 if (host_name)
756 asprintf (&buf, "%sHost: %s:%d\r\n", buf, host_name, server_port);
758 /* optionally send any other header tag */
759 if (http_opt_headers_count) {
760 for (i = 0; i < http_opt_headers_count ; i++) {
761 for ((pos = strtok(http_opt_headers[i], INPUT_DELIMITER)); pos; (pos = strtok(NULL, INPUT_DELIMITER)))
762 asprintf (&buf, "%s%s\r\n", buf, pos);
763 }
764 free(http_opt_headers);
765 }
767 /* optionally send the authentication info */
768 if (strlen(user_auth)) {
769 base64_encode_alloc (user_auth, strlen (user_auth), &auth);
770 asprintf (&buf, "%sAuthorization: Basic %s\r\n", buf, auth);
771 }
773 /* either send http POST data */
774 if (http_post_data) {
775 if (http_content_type) {
776 asprintf (&buf, "%sContent-Type: %s\r\n", buf, http_content_type);
777 } else {
778 asprintf (&buf, "%sContent-Type: application/x-www-form-urlencoded\r\n", buf);
779 }
781 asprintf (&buf, "%sContent-Length: %i\r\n\r\n", buf, (int)strlen (http_post_data));
782 asprintf (&buf, "%s%s%s", buf, http_post_data, CRLF);
783 }
784 else {
785 /* or just a newline so the server knows we're done with the request */
786 asprintf (&buf, "%s%s", buf, CRLF);
787 }
789 if (verbose) printf ("%s\n", buf);
790 my_send (buf, strlen (buf));
792 /* fetch the page */
793 full_page = strdup("");
794 while ((i = my_recv (buffer, MAX_INPUT_BUFFER-1)) > 0) {
795 buffer[i] = '\0';
796 asprintf (&full_page, "%s%s", full_page, buffer);
797 pagesize += i;
799 if (no_body && document_headers_done (full_page)) {
800 i = 0;
801 break;
802 }
803 }
805 if (i < 0 && errno != ECONNRESET) {
806 #ifdef HAVE_SSL
807 /*
808 if (use_ssl) {
809 sslerr=SSL_get_error(ssl, i);
810 if ( sslerr == SSL_ERROR_SSL ) {
811 die (STATE_WARNING, _("HTTP WARNING - Client Certificate Required\n"));
812 } else {
813 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
814 }
815 }
816 else {
817 */
818 #endif
819 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
820 #ifdef HAVE_SSL
821 /* XXX
822 }
823 */
824 #endif
825 }
827 /* return a CRITICAL status if we couldn't read any data */
828 if (pagesize == (size_t) 0)
829 die (STATE_CRITICAL, _("HTTP CRITICAL - No data received from host\n"));
831 /* close the connection */
832 #ifdef HAVE_SSL
833 np_net_ssl_cleanup();
834 #endif
835 if(sd) close(sd);
837 /* reset the alarm */
838 alarm (0);
840 /* leave full_page untouched so we can free it later */
841 page = full_page;
843 if (verbose)
844 printf ("%s://%s:%d%s is %d characters\n",
845 use_ssl ? "https" : "http", server_address,
846 server_port, server_url, (int)pagesize);
848 /* find status line and null-terminate it */
849 status_line = page;
850 page += (size_t) strcspn (page, "\r\n");
851 pos = page;
852 page += (size_t) strspn (page, "\r\n");
853 status_line[strcspn(status_line, "\r\n")] = 0;
854 strip (status_line);
855 if (verbose)
856 printf ("STATUS: %s\n", status_line);
858 /* find header info and null-terminate it */
859 header = page;
860 while (strcspn (page, "\r\n") > 0) {
861 page += (size_t) strcspn (page, "\r\n");
862 pos = page;
863 if ((strspn (page, "\r") == 1 && strspn (page, "\r\n") >= 2) ||
864 (strspn (page, "\n") == 1 && strspn (page, "\r\n") >= 2))
865 page += (size_t) 2;
866 else
867 page += (size_t) 1;
868 }
869 page += (size_t) strspn (page, "\r\n");
870 header[pos - header] = 0;
871 if (verbose)
872 printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
873 (no_body ? " [[ skipped ]]" : page));
875 /* make sure the status line matches the response we are looking for */
876 if (!strstr (status_line, server_expect)) {
877 if (server_port == HTTP_PORT)
878 asprintf (&msg,
879 _("Invalid HTTP response received from host\n"));
880 else
881 asprintf (&msg,
882 _("Invalid HTTP response received from host on port %d\n"),
883 server_port);
884 die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
885 }
887 /* Exit here if server_expect was set by user and not default */
888 if ( server_expect_yn ) {
889 asprintf (&msg,
890 _("HTTP OK: Status line output matched \"%s\"\n"),
891 server_expect);
892 if (verbose)
893 printf ("%s\n",msg);
894 }
895 else {
896 /* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
897 /* HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
898 /* Status-Code = 3 DIGITS */
900 status_code = strchr (status_line, ' ') + sizeof (char);
901 if (strspn (status_code, "1234567890") != 3)
902 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);
904 http_status = atoi (status_code);
906 /* check the return code */
908 if (http_status >= 600 || http_status < 100)
909 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%s)\n"), status_line);
911 /* server errors result in a critical state */
912 else if (http_status >= 500)
913 die (STATE_CRITICAL, _("HTTP CRITICAL: %s\n"), status_line);
915 /* client errors result in a warning state */
916 else if (http_status >= 400)
917 die (STATE_WARNING, _("HTTP WARNING: %s\n"), status_line);
919 /* check redirected page if specified */
920 else if (http_status >= 300) {
922 if (onredirect == STATE_DEPENDENT)
923 redir (header, status_line);
924 else if (onredirect == STATE_UNKNOWN)
925 printf (_("HTTP UNKNOWN"));
926 else if (onredirect == STATE_OK)
927 printf (_("HTTP OK"));
928 else if (onredirect == STATE_WARNING)
929 printf (_("HTTP WARNING"));
930 else if (onredirect == STATE_CRITICAL)
931 printf (_("HTTP CRITICAL"));
932 microsec = deltime (tv);
933 elapsed_time = (double)microsec / 1.0e6;
934 die (onredirect,
935 _(" - %s - %.3f second response time %s|%s %s\n"),
936 status_line, elapsed_time,
937 (display_html ? "</A>" : ""),
938 perfd_time (elapsed_time), perfd_size (pagesize));
939 } /* end if (http_status >= 300) */
941 } /* end else (server_expect_yn) */
943 if (maximum_age >= 0) {
944 check_document_dates (header);
945 }
947 /* check elapsed time */
948 microsec = deltime (tv);
949 elapsed_time = (double)microsec / 1.0e6;
950 asprintf (&msg,
951 _(" - %s - %.3f second response time %s|%s %s\n"),
952 status_line, elapsed_time,
953 (display_html ? "</A>" : ""),
954 perfd_time (elapsed_time), perfd_size (pagesize));
955 if (check_critical_time == TRUE && elapsed_time > critical_time)
956 die (STATE_CRITICAL, "HTTP %s: %s", _("CRITICAL"), msg);
957 if (check_warning_time == TRUE && elapsed_time > warning_time)
958 die (STATE_WARNING, "HTTP %s: %s", _("WARNING"), msg);
960 /* Page and Header content checks go here */
961 /* these checks should be last */
963 if (strlen (string_expect)) {
964 if (strstr (page, string_expect)) {
965 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
966 status_line, elapsed_time,
967 (display_html ? "</A>" : ""),
968 perfd_time (elapsed_time), perfd_size (pagesize));
969 exit (STATE_OK);
970 }
971 else {
972 printf (_("HTTP CRITICAL - string not found%s|%s %s\n"),
973 (display_html ? "</A>" : ""),
974 perfd_time (elapsed_time), perfd_size (pagesize));
975 exit (STATE_CRITICAL);
976 }
977 }
979 if (strlen (regexp)) {
980 errcode = regexec (&preg, page, REGS, pmatch, 0);
981 if ((errcode == 0 && invert_regex == 0) || (errcode == REG_NOMATCH && invert_regex == 1)) {
982 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
983 status_line, elapsed_time,
984 (display_html ? "</A>" : ""),
985 perfd_time (elapsed_time), perfd_size (pagesize));
986 exit (STATE_OK);
987 }
988 else if ((errcode == REG_NOMATCH && invert_regex == 0) || (errcode == 0 && invert_regex == 1)) {
989 if (invert_regex == 0)
990 msg = strdup(_("pattern not found"));
991 else
992 msg = strdup(_("pattern found"));
993 printf (("%s - %s%s|%s %s\n"),
994 _("HTTP CRITICAL"),
995 msg,
996 (display_html ? "</A>" : ""),
997 perfd_time (elapsed_time), perfd_size (pagesize));
998 exit (STATE_CRITICAL);
999 }
1000 else {
1001 regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
1002 printf (_("HTTP CRITICAL - Execute Error: %s\n"), errbuf);
1003 exit (STATE_CRITICAL);
1004 }
1005 }
1007 /* make sure the page is of an appropriate size */
1008 /* page_len = get_content_length(header); */
1009 page_len = pagesize;
1010 if ((max_page_len > 0) && (page_len > max_page_len)) {
1011 printf (_("HTTP WARNING: page size %d too large%s|%s\n"),
1012 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1013 exit (STATE_WARNING);
1014 } else if ((min_page_len > 0) && (page_len < min_page_len)) {
1015 printf (_("HTTP WARNING: page size %d too small%s|%s\n"),
1016 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1017 exit (STATE_WARNING);
1018 }
1019 /* We only get here if all tests have been passed */
1020 asprintf (&msg, _("HTTP OK %s - %d bytes in %.3f seconds %s|%s %s\n"),
1021 status_line, page_len, elapsed_time,
1022 (display_html ? "</A>" : ""),
1023 perfd_time (elapsed_time), perfd_size (page_len));
1024 die (STATE_OK, "%s", msg);
1025 return STATE_UNKNOWN;
1026 }
1030 /* per RFC 2396 */
1031 #define URI_HTTP "%5[HTPShtps]"
1032 #define URI_HOST "%255[-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1033 #define URI_PORT "%6d" /* MAX_PORT's width is 5 chars, 6 to detect overflow */
1034 #define URI_PATH "%[-_.!~*'();/?:@&=+$,%#abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1035 #define HD1 URI_HTTP "://" URI_HOST ":" URI_PORT "/" URI_PATH
1036 #define HD2 URI_HTTP "://" URI_HOST "/" URI_PATH
1037 #define HD3 URI_HTTP "://" URI_HOST ":" URI_PORT
1038 #define HD4 URI_HTTP "://" URI_HOST
1039 #define HD5 URI_PATH
1041 void
1042 redir (char *pos, char *status_line)
1043 {
1044 int i = 0;
1045 char *x;
1046 char xx[2];
1047 char type[6];
1048 char *addr;
1049 char *url;
1051 addr = malloc (MAX_IPV4_HOSTLENGTH + 1);
1052 if (addr == NULL)
1053 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate addr\n"));
1055 url = malloc (strcspn (pos, "\r\n"));
1056 if (url == NULL)
1057 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate url\n"));
1059 while (pos) {
1060 sscanf (pos, "%1[Ll]%*1[Oo]%*1[Cc]%*1[Aa]%*1[Tt]%*1[Ii]%*1[Oo]%*1[Nn]:%n", xx, &i);
1061 if (i == 0) {
1062 pos += (size_t) strcspn (pos, "\r\n");
1063 pos += (size_t) strspn (pos, "\r\n");
1064 if (strlen(pos) == 0)
1065 die (STATE_UNKNOWN,
1066 _("HTTP UNKNOWN - Could not find redirect location - %s%s\n"),
1067 status_line, (display_html ? "</A>" : ""));
1068 continue;
1069 }
1071 pos += i;
1072 pos += strspn (pos, " \t");
1074 /*
1075 * RFC 2616 (4.2): ``Header fields can be extended over multiple lines by
1076 * preceding each extra line with at least one SP or HT.''
1077 */
1078 for (; (i = strspn (pos, "\r\n")); pos += i) {
1079 pos += i;
1080 if (!(i = strspn (pos, " \t"))) {
1081 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Empty redirect location%s\n"),
1082 display_html ? "</A>" : "");
1083 }
1084 }
1086 url = realloc (url, strcspn (pos, "\r\n") + 1);
1087 if (url == NULL)
1088 die (STATE_UNKNOWN, _("HTTP UNKNOWN - could not allocate url\n"));
1090 /* URI_HTTP, URI_HOST, URI_PORT, URI_PATH */
1091 if (sscanf (pos, HD1, type, addr, &i, url) == 4)
1092 use_ssl = server_type_check (type);
1094 /* URI_HTTP URI_HOST URI_PATH */
1095 else if (sscanf (pos, HD2, type, addr, url) == 3 ) {
1096 use_ssl = server_type_check (type);
1097 i = server_port_check (use_ssl);
1098 }
1100 /* URI_HTTP URI_HOST URI_PORT */
1101 else if(sscanf (pos, HD3, type, addr, &i) == 3) {
1102 strcpy (url, HTTP_URL);
1103 use_ssl = server_type_check (type);
1104 }
1106 /* URI_HTTP URI_HOST */
1107 else if(sscanf (pos, HD4, type, addr) == 2) {
1108 strcpy (url, HTTP_URL);
1109 use_ssl = server_type_check (type);
1110 i = server_port_check (use_ssl);
1111 }
1113 /* URI_PATH */
1114 else if (sscanf (pos, HD5, url) == 1) {
1115 /* relative url */
1116 if ((url[0] != '/')) {
1117 if ((x = strrchr(server_url, '/')))
1118 *x = '\0';
1119 asprintf (&url, "%s/%s", server_url, url);
1120 }
1121 i = server_port;
1122 strcpy (type, server_type);
1123 strcpy (addr, host_name ? host_name : server_address);
1124 }
1126 else {
1127 die (STATE_UNKNOWN,
1128 _("HTTP UNKNOWN - Could not parse redirect location - %s%s\n"),
1129 pos, (display_html ? "</A>" : ""));
1130 }
1132 break;
1134 } /* end while (pos) */
1136 if (++redir_depth > max_depth)
1137 die (STATE_WARNING,
1138 _("HTTP WARNING - maximum redirection depth %d exceeded - %s://%s:%d%s%s\n"),
1139 max_depth, type, addr, i, url, (display_html ? "</A>" : ""));
1141 if (server_port==i &&
1142 !strcmp(server_address, addr) &&
1143 (host_name && !strcmp(host_name, addr)) &&
1144 !strcmp(server_url, url))
1145 die (STATE_WARNING,
1146 _("HTTP WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
1147 type, addr, i, url, (display_html ? "</A>" : ""));
1149 strcpy (server_type, type);
1151 free (host_name);
1152 host_name = strdup (addr);
1154 free (server_address);
1155 server_address = strdup (addr);
1157 free (server_url);
1158 if ((url[0] == '/'))
1159 server_url = strdup (url);
1160 else if (asprintf(&server_url, "/%s", url) == -1)
1161 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate server_url%s\n"),
1162 display_html ? "</A>" : "");
1163 free(url);
1165 if ((server_port = i) > MAX_PORT)
1166 die (STATE_UNKNOWN,
1167 _("HTTP UNKNOWN - Redirection to port above %d - %s://%s:%d%s%s\n"),
1168 MAX_PORT, server_type, server_address, server_port, server_url,
1169 display_html ? "</A>" : "");
1171 if (verbose)
1172 printf (_("Redirection to %s://%s:%d%s\n"), server_type,
1173 host_name ? host_name : server_address, server_port, server_url);
1175 check_http ();
1176 }
1180 int
1181 server_type_check (const char *type)
1182 {
1183 if (strcmp (type, "https"))
1184 return FALSE;
1185 else
1186 return TRUE;
1187 }
1189 int
1190 server_port_check (int ssl_flag)
1191 {
1192 if (ssl_flag)
1193 return HTTPS_PORT;
1194 else
1195 return HTTP_PORT;
1196 }
1198 char *perfd_time (double elapsed_time)
1199 {
1200 return fperfdata ("time", elapsed_time, "s",
1201 check_warning_time, warning_time,
1202 check_critical_time, critical_time,
1203 TRUE, 0, FALSE, 0);
1204 }
1208 char *perfd_size (int page_len)
1209 {
1210 return perfdata ("size", page_len, "B",
1211 (min_page_len>0?TRUE:FALSE), min_page_len,
1212 (min_page_len>0?TRUE:FALSE), 0,
1213 TRUE, 0, FALSE, 0);
1214 }
1216 void
1217 print_help (void)
1218 {
1219 print_revision (progname, revision);
1221 printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
1222 printf (COPYRIGHT, copyright, email);
1224 printf ("%s\n", _("This plugin tests the HTTP service on the specified host. It can test"));
1225 printf ("%s\n", _("normal (http) and secure (https) servers, follow redirects, search for"));
1226 printf ("%s\n", _("strings and regular expressions, check connection times, and report on"));
1227 printf ("%s\n", _("certificate expiration times."));
1229 printf ("\n\n");
1231 print_usage ();
1233 printf (_("NOTE: One or both of -H and -I must be specified"));
1235 printf ("\n");
1237 printf (_(UT_HELP_VRSN));
1238 printf (_(UT_EXTRA_OPTS));
1240 printf (" %s\n", "-H, --hostname=ADDRESS");
1241 printf (" %s\n", _("Host name argument for servers using host headers (virtual host)"));
1242 printf (" %s\n", _("Append a port to include it in the header (eg: example.com:5000)"));
1243 printf (" %s\n", "-I, --IP-address=ADDRESS");
1244 printf (" %s\n", _("IP address or name (use numeric address if possible to bypass DNS lookup)."));
1245 printf (" %s\n", "-p, --port=INTEGER");
1246 printf (" %s", _("Port number (default: "));
1247 printf ("%d)\n", HTTP_PORT);
1249 printf (_(UT_IPv46));
1251 #ifdef HAVE_SSL
1252 printf (" %s\n", "-S, --ssl");
1253 printf (" %s\n", _("Connect via SSL. Port defaults to 443"));
1254 printf (" %s\n", "-C, --certificate=INTEGER");
1255 printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
1256 printf (" %s\n", _("(when this option is used the url is not checked.)\n"));
1257 #endif
1259 printf (" %s\n", "-e, --expect=STRING");
1260 printf (" %s\n", _("String to expect in first (status) line of server response (default: "));
1261 printf ("%s)\n", HTTP_EXPECT);
1262 printf (" %s\n", _("If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)"));
1263 printf (" %s\n", "-s, --string=STRING");
1264 printf (" %s\n", _("String to expect in the content"));
1265 printf (" %s\n", "-u, --url=PATH");
1266 printf (" %s\n", _("URL to GET or POST (default: /)"));
1267 printf (" %s\n", "-P, --post=STRING");
1268 printf (" %s\n", _("URL encoded http POST data"));
1269 printf (" %s\n", "-N, --no-body");
1270 printf (" %s\n", _("Don't wait for document body: stop reading after headers."));
1271 printf (" %s\n", _("(Note that this still does an HTTP GET or POST, not a HEAD.)"));
1272 printf (" %s\n", "-M, --max-age=SECONDS");
1273 printf (" %s\n", _("Warn if document is more than SECONDS old. the number can also be of"));
1274 printf (" %s\n", _("the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days."));
1275 printf (" %s\n", "-T, --content-type=STRING");
1276 printf (" %s\n", _("specify Content-Type header media type when POSTing\n"));
1278 printf (" %s\n", "-l, --linespan");
1279 printf (" %s\n", _("Allow regex to span newlines (must precede -r or -R)"));
1280 printf (" %s\n", "-r, --regex, --ereg=STRING");
1281 printf (" %s\n", _("Search page for regex STRING"));
1282 printf (" %s\n", "-R, --eregi=STRING");
1283 printf (" %s\n", _("Search page for case-insensitive regex STRING"));
1284 printf (" %s\n", "--invert-regex");
1285 printf (" %s\n", _("Return CRITICAL if found, OK if not\n"));
1287 printf (" %s\n", "-a, --authorization=AUTH_PAIR");
1288 printf (" %s\n", _("Username:password on sites with basic authentication"));
1289 printf (" %s\n", "-A, --useragent=STRING");
1290 printf (" %s\n", _("String to be sent in http header as \"User Agent\""));
1291 printf (" %s\n", "-k, --header=STRING");
1292 printf (" %s\n", _(" Any other tags to be sent in http header. Use multiple times for additional headers"));
1293 printf (" %s\n", "-L, --link");
1294 printf (" %s\n", _("Wrap output in HTML link (obsoleted by urlize)"));
1295 printf (" %s\n", "-f, --onredirect=<ok|warning|critical|follow>");
1296 printf (" %s\n", _("How to handle redirected pages"));
1297 printf (" %s\n", "-m, --pagesize=INTEGER<:INTEGER>");
1298 printf (" %s\n", _("Minimum page size required (bytes) : Maximum page size required (bytes)"));
1300 printf (_(UT_WARN_CRIT));
1302 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
1304 printf (_(UT_VERBOSE));
1306 printf ("\n");
1307 printf ("%s\n", _("Notes:"));
1308 printf (" %s\n", _("This plugin will attempt to open an HTTP connection with the host."));
1309 printf (" %s\n", _("Successful connects return STATE_OK, refusals and timeouts return STATE_CRITICAL"));
1310 printf (" %s\n", _("other errors return STATE_UNKNOWN. Successful connects, but incorrect reponse"));
1311 printf (" %s\n", _("messages from the host result in STATE_WARNING return values. If you are"));
1312 printf (" %s\n", _("checking a virtual server that uses 'host headers' you must supply the FQDN"));
1313 printf (" %s\n", _("(fully qualified domain name) as the [host_name] argument."));
1314 printf ("\n");
1315 printf (_(UT_EXTRA_OPTS_NOTES));
1317 #ifdef HAVE_SSL
1318 printf ("\n");
1319 printf (" %s\n", _("This plugin can also check whether an SSL enabled web server is able to"));
1320 printf (" %s\n", _("serve content (optionally within a specified time) or whether the X509 "));
1321 printf (" %s\n", _("certificate is still valid for the specified number of days."));
1322 printf ("\n");
1323 printf ("%s\n", _("Examples:"));
1324 printf (" %s\n\n", "CHECK CONTENT: check_http -w 5 -c 10 --ssl -H www.verisign.com");
1325 printf (" %s\n", _("When the 'www.verisign.com' server returns its content within 5 seconds,"));
1326 printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
1327 printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
1328 printf (" %s\n\n", _("a STATE_CRITICAL will be returned."));
1330 printf (" %s\n\n", "CHECK CERTIFICATE: check_http -H www.verisign.com -C 14");
1331 printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 14 days,"));
1332 printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
1333 printf (" %s\n", _("14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when"));
1334 printf (" %s\n", _("the certificate is expired."));
1335 #endif
1337 printf (_(UT_SUPPORT));
1339 }
1343 void
1344 print_usage (void)
1345 {
1346 printf (_("Usage:"));
1347 printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname);
1348 printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]\n");
1349 printf (" [-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]\n");
1350 printf (" [-s string] [-l] [-r <regex> | -R <case-insensitive regex>] [-P string]\n");
1351 printf (" [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>] [-A string]\n");
1352 printf (" [-k string] [-S] [-C <age>] [-T <content-type>]\n");
1353 }