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++;
602 /* Avoid stepping over end-of-string marker */
603 if (*s)
604 s++;
606 /* Process this header. */
607 if (value && value > field+2) {
608 char *ff = (char *) malloc (value-field);
609 char *ss = ff;
610 while (field < value-1)
611 *ss++ = tolower(*field++);
612 *ss++ = 0;
614 if (!strcmp (ff, "date") || !strcmp (ff, "last-modified")) {
615 const char *e;
616 while (*value && isspace (*value))
617 value++;
618 for (e = value; *e && *e != '\r' && *e != '\n'; e++)
619 ;
620 ss = (char *) malloc (e - value + 1);
621 strncpy (ss, value, e - value);
622 ss[e - value] = 0;
623 if (!strcmp (ff, "date")) {
624 if (server_date) free (server_date);
625 server_date = ss;
626 } else {
627 if (document_date) free (document_date);
628 document_date = ss;
629 }
630 }
631 free (ff);
632 }
633 }
635 /* Done parsing the body. Now check the dates we (hopefully) parsed. */
636 if (!server_date || !*server_date) {
637 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Server date unknown\n"));
638 } else if (!document_date || !*document_date) {
639 die (STATE_CRITICAL, _("HTTP CRITICAL - Document modification date unknown\n"));
640 } else {
641 time_t srv_data = parse_time_string (server_date);
642 time_t doc_data = parse_time_string (document_date);
644 if (srv_data <= 0) {
645 die (STATE_CRITICAL, _("HTTP CRITICAL - Server date \"%100s\" unparsable"), server_date);
646 } else if (doc_data <= 0) {
647 die (STATE_CRITICAL, _("HTTP CRITICAL - Document date \"%100s\" unparsable"), document_date);
648 } else if (doc_data > srv_data + 30) {
649 die (STATE_CRITICAL, _("HTTP CRITICAL - Document is %d seconds in the future\n"), (int)doc_data - (int)srv_data);
650 } else if (doc_data < srv_data - maximum_age) {
651 int n = (srv_data - doc_data);
652 if (n > (60 * 60 * 24 * 2))
653 die (STATE_CRITICAL,
654 _("HTTP CRITICAL - Last modified %.1f days ago\n"),
655 ((float) n) / (60 * 60 * 24));
656 else
657 die (STATE_CRITICAL,
658 _("HTTP CRITICAL - Last modified %d:%02d:%02d ago\n"),
659 n / (60 * 60), (n / 60) % 60, n % 60);
660 }
662 free (server_date);
663 free (document_date);
664 }
665 }
667 int
668 get_content_length (const char *headers)
669 {
670 const char *s;
671 int content_length = 0;
673 s = headers;
674 while (*s) {
675 const char *field = s;
676 const char *value = 0;
678 /* Find the end of the header field */
679 while (*s && !isspace(*s) && *s != ':')
680 s++;
682 /* Remember the header value, if any. */
683 if (*s == ':')
684 value = ++s;
686 /* Skip to the end of the header, including continuation lines. */
687 while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
688 s++;
689 s++;
691 /* Process this header. */
692 if (value && value > field+2) {
693 char *ff = (char *) malloc (value-field);
694 char *ss = ff;
695 while (field < value-1)
696 *ss++ = tolower(*field++);
697 *ss++ = 0;
699 if (!strcmp (ff, "content-length")) {
700 const char *e;
701 while (*value && isspace (*value))
702 value++;
703 for (e = value; *e && *e != '\r' && *e != '\n'; e++)
704 ;
705 ss = (char *) malloc (e - value + 1);
706 strncpy (ss, value, e - value);
707 ss[e - value] = 0;
708 content_length = atoi(ss);
709 free (ss);
710 }
711 free (ff);
712 }
713 }
714 return (content_length);
715 }
717 int
718 check_http (void)
719 {
720 char *msg;
721 char *status_line;
722 char *status_code;
723 char *header;
724 char *page;
725 char *auth;
726 int http_status;
727 int i = 0;
728 size_t pagesize = 0;
729 char *full_page;
730 char *buf;
731 char *pos;
732 long microsec;
733 double elapsed_time;
734 int page_len = 0;
735 int result = STATE_UNKNOWN;
737 /* try to connect to the host at the given port number */
738 if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
739 die (STATE_CRITICAL, _("HTTP CRITICAL - Unable to open TCP socket\n"));
740 #ifdef HAVE_SSL
741 if (use_ssl == TRUE) {
742 np_net_ssl_init(sd);
743 if (check_cert == TRUE) {
744 result = np_net_ssl_check_cert(days_till_exp);
745 np_net_ssl_cleanup();
746 if(sd) close(sd);
747 return result;
748 }
749 }
750 #endif /* HAVE_SSL */
752 asprintf (&buf, "%s %s HTTP/1.0\r\n%s\r\n", http_method, server_url, user_agent);
754 /* tell HTTP/1.1 servers not to keep the connection alive */
755 asprintf (&buf, "%sConnection: close\r\n", buf);
757 /* optionally send the host header info */
758 if (host_name)
759 asprintf (&buf, "%sHost: %s:%d\r\n", buf, host_name, server_port);
761 /* optionally send any other header tag */
762 if (http_opt_headers_count) {
763 for (i = 0; i < http_opt_headers_count ; i++) {
764 for ((pos = strtok(http_opt_headers[i], INPUT_DELIMITER)); pos; (pos = strtok(NULL, INPUT_DELIMITER)))
765 asprintf (&buf, "%s%s\r\n", buf, pos);
766 }
767 free(http_opt_headers);
768 }
770 /* optionally send the authentication info */
771 if (strlen(user_auth)) {
772 base64_encode_alloc (user_auth, strlen (user_auth), &auth);
773 asprintf (&buf, "%sAuthorization: Basic %s\r\n", buf, auth);
774 }
776 /* either send http POST data */
777 if (http_post_data) {
778 if (http_content_type) {
779 asprintf (&buf, "%sContent-Type: %s\r\n", buf, http_content_type);
780 } else {
781 asprintf (&buf, "%sContent-Type: application/x-www-form-urlencoded\r\n", buf);
782 }
784 asprintf (&buf, "%sContent-Length: %i\r\n\r\n", buf, (int)strlen (http_post_data));
785 asprintf (&buf, "%s%s%s", buf, http_post_data, CRLF);
786 }
787 else {
788 /* or just a newline so the server knows we're done with the request */
789 asprintf (&buf, "%s%s", buf, CRLF);
790 }
792 if (verbose) printf ("%s\n", buf);
793 my_send (buf, strlen (buf));
795 /* fetch the page */
796 full_page = strdup("");
797 while ((i = my_recv (buffer, MAX_INPUT_BUFFER-1)) > 0) {
798 buffer[i] = '\0';
799 asprintf (&full_page, "%s%s", full_page, buffer);
800 pagesize += i;
802 if (no_body && document_headers_done (full_page)) {
803 i = 0;
804 break;
805 }
806 }
808 if (i < 0 && errno != ECONNRESET) {
809 #ifdef HAVE_SSL
810 /*
811 if (use_ssl) {
812 sslerr=SSL_get_error(ssl, i);
813 if ( sslerr == SSL_ERROR_SSL ) {
814 die (STATE_WARNING, _("HTTP WARNING - Client Certificate Required\n"));
815 } else {
816 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
817 }
818 }
819 else {
820 */
821 #endif
822 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
823 #ifdef HAVE_SSL
824 /* XXX
825 }
826 */
827 #endif
828 }
830 /* return a CRITICAL status if we couldn't read any data */
831 if (pagesize == (size_t) 0)
832 die (STATE_CRITICAL, _("HTTP CRITICAL - No data received from host\n"));
834 /* close the connection */
835 #ifdef HAVE_SSL
836 np_net_ssl_cleanup();
837 #endif
838 if(sd) close(sd);
840 /* reset the alarm */
841 alarm (0);
843 /* leave full_page untouched so we can free it later */
844 page = full_page;
846 if (verbose)
847 printf ("%s://%s:%d%s is %d characters\n",
848 use_ssl ? "https" : "http", server_address,
849 server_port, server_url, (int)pagesize);
851 /* find status line and null-terminate it */
852 status_line = page;
853 page += (size_t) strcspn (page, "\r\n");
854 pos = page;
855 page += (size_t) strspn (page, "\r\n");
856 status_line[strcspn(status_line, "\r\n")] = 0;
857 strip (status_line);
858 if (verbose)
859 printf ("STATUS: %s\n", status_line);
861 /* find header info and null-terminate it */
862 header = page;
863 while (strcspn (page, "\r\n") > 0) {
864 page += (size_t) strcspn (page, "\r\n");
865 pos = page;
866 if ((strspn (page, "\r") == 1 && strspn (page, "\r\n") >= 2) ||
867 (strspn (page, "\n") == 1 && strspn (page, "\r\n") >= 2))
868 page += (size_t) 2;
869 else
870 page += (size_t) 1;
871 }
872 page += (size_t) strspn (page, "\r\n");
873 header[pos - header] = 0;
874 if (verbose)
875 printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
876 (no_body ? " [[ skipped ]]" : page));
878 /* make sure the status line matches the response we are looking for */
879 if (!strstr (status_line, server_expect)) {
880 if (server_port == HTTP_PORT)
881 asprintf (&msg,
882 _("Invalid HTTP response received from host\n"));
883 else
884 asprintf (&msg,
885 _("Invalid HTTP response received from host on port %d\n"),
886 server_port);
887 die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
888 }
890 /* Exit here if server_expect was set by user and not default */
891 if ( server_expect_yn ) {
892 asprintf (&msg,
893 _("HTTP OK: Status line output matched \"%s\"\n"),
894 server_expect);
895 if (verbose)
896 printf ("%s\n",msg);
897 }
898 else {
899 /* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
900 /* HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
901 /* Status-Code = 3 DIGITS */
903 status_code = strchr (status_line, ' ') + sizeof (char);
904 if (strspn (status_code, "1234567890") != 3)
905 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);
907 http_status = atoi (status_code);
909 /* check the return code */
911 if (http_status >= 600 || http_status < 100)
912 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%s)\n"), status_line);
914 /* server errors result in a critical state */
915 else if (http_status >= 500)
916 die (STATE_CRITICAL, _("HTTP CRITICAL: %s\n"), status_line);
918 /* client errors result in a warning state */
919 else if (http_status >= 400)
920 die (STATE_WARNING, _("HTTP WARNING: %s\n"), status_line);
922 /* check redirected page if specified */
923 else if (http_status >= 300) {
925 if (onredirect == STATE_DEPENDENT)
926 redir (header, status_line);
927 else if (onredirect == STATE_UNKNOWN)
928 printf (_("HTTP UNKNOWN"));
929 else if (onredirect == STATE_OK)
930 printf (_("HTTP OK"));
931 else if (onredirect == STATE_WARNING)
932 printf (_("HTTP WARNING"));
933 else if (onredirect == STATE_CRITICAL)
934 printf (_("HTTP CRITICAL"));
935 microsec = deltime (tv);
936 elapsed_time = (double)microsec / 1.0e6;
937 die (onredirect,
938 _(" - %s - %.3f second response time %s|%s %s\n"),
939 status_line, elapsed_time,
940 (display_html ? "</A>" : ""),
941 perfd_time (elapsed_time), perfd_size (pagesize));
942 } /* end if (http_status >= 300) */
944 } /* end else (server_expect_yn) */
946 if (maximum_age >= 0) {
947 check_document_dates (header);
948 }
950 /* check elapsed time */
951 microsec = deltime (tv);
952 elapsed_time = (double)microsec / 1.0e6;
953 asprintf (&msg,
954 _(" - %s - %.3f second response time %s|%s %s\n"),
955 status_line, elapsed_time,
956 (display_html ? "</A>" : ""),
957 perfd_time (elapsed_time), perfd_size (pagesize));
958 if (check_critical_time == TRUE && elapsed_time > critical_time)
959 die (STATE_CRITICAL, "HTTP %s: %s", _("CRITICAL"), msg);
960 if (check_warning_time == TRUE && elapsed_time > warning_time)
961 die (STATE_WARNING, "HTTP %s: %s", _("WARNING"), msg);
963 /* Page and Header content checks go here */
964 /* these checks should be last */
966 if (strlen (string_expect)) {
967 if (strstr (page, string_expect)) {
968 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
969 status_line, elapsed_time,
970 (display_html ? "</A>" : ""),
971 perfd_time (elapsed_time), perfd_size (pagesize));
972 exit (STATE_OK);
973 }
974 else {
975 printf (_("HTTP CRITICAL - string not found%s|%s %s\n"),
976 (display_html ? "</A>" : ""),
977 perfd_time (elapsed_time), perfd_size (pagesize));
978 exit (STATE_CRITICAL);
979 }
980 }
982 if (strlen (regexp)) {
983 errcode = regexec (&preg, page, REGS, pmatch, 0);
984 if ((errcode == 0 && invert_regex == 0) || (errcode == REG_NOMATCH && invert_regex == 1)) {
985 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
986 status_line, elapsed_time,
987 (display_html ? "</A>" : ""),
988 perfd_time (elapsed_time), perfd_size (pagesize));
989 exit (STATE_OK);
990 }
991 else if ((errcode == REG_NOMATCH && invert_regex == 0) || (errcode == 0 && invert_regex == 1)) {
992 if (invert_regex == 0)
993 msg = strdup(_("pattern not found"));
994 else
995 msg = strdup(_("pattern found"));
996 printf (("%s - %s%s|%s %s\n"),
997 _("HTTP CRITICAL"),
998 msg,
999 (display_html ? "</A>" : ""),
1000 perfd_time (elapsed_time), perfd_size (pagesize));
1001 exit (STATE_CRITICAL);
1002 }
1003 else {
1004 regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
1005 printf (_("HTTP CRITICAL - Execute Error: %s\n"), errbuf);
1006 exit (STATE_CRITICAL);
1007 }
1008 }
1010 /* make sure the page is of an appropriate size */
1011 /* page_len = get_content_length(header); */
1012 page_len = pagesize;
1013 if ((max_page_len > 0) && (page_len > max_page_len)) {
1014 printf (_("HTTP WARNING: page size %d too large%s|%s\n"),
1015 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1016 exit (STATE_WARNING);
1017 } else if ((min_page_len > 0) && (page_len < min_page_len)) {
1018 printf (_("HTTP WARNING: page size %d too small%s|%s\n"),
1019 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1020 exit (STATE_WARNING);
1021 }
1022 /* We only get here if all tests have been passed */
1023 asprintf (&msg, _("HTTP OK %s - %d bytes in %.3f seconds %s|%s %s\n"),
1024 status_line, page_len, elapsed_time,
1025 (display_html ? "</A>" : ""),
1026 perfd_time (elapsed_time), perfd_size (page_len));
1027 die (STATE_OK, "%s", msg);
1028 return STATE_UNKNOWN;
1029 }
1033 /* per RFC 2396 */
1034 #define URI_HTTP "%5[HTPShtps]"
1035 #define URI_HOST "%255[-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1036 #define URI_PORT "%6d" /* MAX_PORT's width is 5 chars, 6 to detect overflow */
1037 #define URI_PATH "%[-_.!~*'();/?:@&=+$,%#abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1038 #define HD1 URI_HTTP "://" URI_HOST ":" URI_PORT "/" URI_PATH
1039 #define HD2 URI_HTTP "://" URI_HOST "/" URI_PATH
1040 #define HD3 URI_HTTP "://" URI_HOST ":" URI_PORT
1041 #define HD4 URI_HTTP "://" URI_HOST
1042 #define HD5 URI_PATH
1044 void
1045 redir (char *pos, char *status_line)
1046 {
1047 int i = 0;
1048 char *x;
1049 char xx[2];
1050 char type[6];
1051 char *addr;
1052 char *url;
1054 addr = malloc (MAX_IPV4_HOSTLENGTH + 1);
1055 if (addr == NULL)
1056 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate addr\n"));
1058 url = malloc (strcspn (pos, "\r\n"));
1059 if (url == NULL)
1060 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate url\n"));
1062 while (pos) {
1063 sscanf (pos, "%1[Ll]%*1[Oo]%*1[Cc]%*1[Aa]%*1[Tt]%*1[Ii]%*1[Oo]%*1[Nn]:%n", xx, &i);
1064 if (i == 0) {
1065 pos += (size_t) strcspn (pos, "\r\n");
1066 pos += (size_t) strspn (pos, "\r\n");
1067 if (strlen(pos) == 0)
1068 die (STATE_UNKNOWN,
1069 _("HTTP UNKNOWN - Could not find redirect location - %s%s\n"),
1070 status_line, (display_html ? "</A>" : ""));
1071 continue;
1072 }
1074 pos += i;
1075 pos += strspn (pos, " \t");
1077 /*
1078 * RFC 2616 (4.2): ``Header fields can be extended over multiple lines by
1079 * preceding each extra line with at least one SP or HT.''
1080 */
1081 for (; (i = strspn (pos, "\r\n")); pos += i) {
1082 pos += i;
1083 if (!(i = strspn (pos, " \t"))) {
1084 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Empty redirect location%s\n"),
1085 display_html ? "</A>" : "");
1086 }
1087 }
1089 url = realloc (url, strcspn (pos, "\r\n") + 1);
1090 if (url == NULL)
1091 die (STATE_UNKNOWN, _("HTTP UNKNOWN - could not allocate url\n"));
1093 /* URI_HTTP, URI_HOST, URI_PORT, URI_PATH */
1094 if (sscanf (pos, HD1, type, addr, &i, url) == 4)
1095 use_ssl = server_type_check (type);
1097 /* URI_HTTP URI_HOST URI_PATH */
1098 else if (sscanf (pos, HD2, type, addr, url) == 3 ) {
1099 use_ssl = server_type_check (type);
1100 i = server_port_check (use_ssl);
1101 }
1103 /* URI_HTTP URI_HOST URI_PORT */
1104 else if(sscanf (pos, HD3, type, addr, &i) == 3) {
1105 strcpy (url, HTTP_URL);
1106 use_ssl = server_type_check (type);
1107 }
1109 /* URI_HTTP URI_HOST */
1110 else if(sscanf (pos, HD4, type, addr) == 2) {
1111 strcpy (url, HTTP_URL);
1112 use_ssl = server_type_check (type);
1113 i = server_port_check (use_ssl);
1114 }
1116 /* URI_PATH */
1117 else if (sscanf (pos, HD5, url) == 1) {
1118 /* relative url */
1119 if ((url[0] != '/')) {
1120 if ((x = strrchr(server_url, '/')))
1121 *x = '\0';
1122 asprintf (&url, "%s/%s", server_url, url);
1123 }
1124 i = server_port;
1125 strcpy (type, server_type);
1126 strcpy (addr, host_name ? host_name : server_address);
1127 }
1129 else {
1130 die (STATE_UNKNOWN,
1131 _("HTTP UNKNOWN - Could not parse redirect location - %s%s\n"),
1132 pos, (display_html ? "</A>" : ""));
1133 }
1135 break;
1137 } /* end while (pos) */
1139 if (++redir_depth > max_depth)
1140 die (STATE_WARNING,
1141 _("HTTP WARNING - maximum redirection depth %d exceeded - %s://%s:%d%s%s\n"),
1142 max_depth, type, addr, i, url, (display_html ? "</A>" : ""));
1144 if (server_port==i &&
1145 !strcmp(server_address, addr) &&
1146 (host_name && !strcmp(host_name, addr)) &&
1147 !strcmp(server_url, url))
1148 die (STATE_WARNING,
1149 _("HTTP WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
1150 type, addr, i, url, (display_html ? "</A>" : ""));
1152 strcpy (server_type, type);
1154 free (host_name);
1155 host_name = strdup (addr);
1157 free (server_address);
1158 server_address = strdup (addr);
1160 free (server_url);
1161 if ((url[0] == '/'))
1162 server_url = strdup (url);
1163 else if (asprintf(&server_url, "/%s", url) == -1)
1164 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate server_url%s\n"),
1165 display_html ? "</A>" : "");
1166 free(url);
1168 if ((server_port = i) > MAX_PORT)
1169 die (STATE_UNKNOWN,
1170 _("HTTP UNKNOWN - Redirection to port above %d - %s://%s:%d%s%s\n"),
1171 MAX_PORT, server_type, server_address, server_port, server_url,
1172 display_html ? "</A>" : "");
1174 if (verbose)
1175 printf (_("Redirection to %s://%s:%d%s\n"), server_type,
1176 host_name ? host_name : server_address, server_port, server_url);
1178 check_http ();
1179 }
1183 int
1184 server_type_check (const char *type)
1185 {
1186 if (strcmp (type, "https"))
1187 return FALSE;
1188 else
1189 return TRUE;
1190 }
1192 int
1193 server_port_check (int ssl_flag)
1194 {
1195 if (ssl_flag)
1196 return HTTPS_PORT;
1197 else
1198 return HTTP_PORT;
1199 }
1201 char *perfd_time (double elapsed_time)
1202 {
1203 return fperfdata ("time", elapsed_time, "s",
1204 check_warning_time, warning_time,
1205 check_critical_time, critical_time,
1206 TRUE, 0, FALSE, 0);
1207 }
1211 char *perfd_size (int page_len)
1212 {
1213 return perfdata ("size", page_len, "B",
1214 (min_page_len>0?TRUE:FALSE), min_page_len,
1215 (min_page_len>0?TRUE:FALSE), 0,
1216 TRUE, 0, FALSE, 0);
1217 }
1219 void
1220 print_help (void)
1221 {
1222 print_revision (progname, revision);
1224 printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
1225 printf (COPYRIGHT, copyright, email);
1227 printf ("%s\n", _("This plugin tests the HTTP service on the specified host. It can test"));
1228 printf ("%s\n", _("normal (http) and secure (https) servers, follow redirects, search for"));
1229 printf ("%s\n", _("strings and regular expressions, check connection times, and report on"));
1230 printf ("%s\n", _("certificate expiration times."));
1232 printf ("\n\n");
1234 print_usage ();
1236 printf (_("NOTE: One or both of -H and -I must be specified"));
1238 printf ("\n");
1240 printf (_(UT_HELP_VRSN));
1241 printf (_(UT_EXTRA_OPTS));
1243 printf (" %s\n", "-H, --hostname=ADDRESS");
1244 printf (" %s\n", _("Host name argument for servers using host headers (virtual host)"));
1245 printf (" %s\n", _("Append a port to include it in the header (eg: example.com:5000)"));
1246 printf (" %s\n", "-I, --IP-address=ADDRESS");
1247 printf (" %s\n", _("IP address or name (use numeric address if possible to bypass DNS lookup)."));
1248 printf (" %s\n", "-p, --port=INTEGER");
1249 printf (" %s", _("Port number (default: "));
1250 printf ("%d)\n", HTTP_PORT);
1252 printf (_(UT_IPv46));
1254 #ifdef HAVE_SSL
1255 printf (" %s\n", "-S, --ssl");
1256 printf (" %s\n", _("Connect via SSL. Port defaults to 443"));
1257 printf (" %s\n", "-C, --certificate=INTEGER");
1258 printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
1259 printf (" %s\n", _("(when this option is used the url is not checked.)\n"));
1260 #endif
1262 printf (" %s\n", "-e, --expect=STRING");
1263 printf (" %s\n", _("String to expect in first (status) line of server response (default: "));
1264 printf ("%s)\n", HTTP_EXPECT);
1265 printf (" %s\n", _("If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)"));
1266 printf (" %s\n", "-s, --string=STRING");
1267 printf (" %s\n", _("String to expect in the content"));
1268 printf (" %s\n", "-u, --url=PATH");
1269 printf (" %s\n", _("URL to GET or POST (default: /)"));
1270 printf (" %s\n", "-P, --post=STRING");
1271 printf (" %s\n", _("URL encoded http POST data"));
1272 printf (" %s\n", "-N, --no-body");
1273 printf (" %s\n", _("Don't wait for document body: stop reading after headers."));
1274 printf (" %s\n", _("(Note that this still does an HTTP GET or POST, not a HEAD.)"));
1275 printf (" %s\n", "-M, --max-age=SECONDS");
1276 printf (" %s\n", _("Warn if document is more than SECONDS old. the number can also be of"));
1277 printf (" %s\n", _("the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days."));
1278 printf (" %s\n", "-T, --content-type=STRING");
1279 printf (" %s\n", _("specify Content-Type header media type when POSTing\n"));
1281 printf (" %s\n", "-l, --linespan");
1282 printf (" %s\n", _("Allow regex to span newlines (must precede -r or -R)"));
1283 printf (" %s\n", "-r, --regex, --ereg=STRING");
1284 printf (" %s\n", _("Search page for regex STRING"));
1285 printf (" %s\n", "-R, --eregi=STRING");
1286 printf (" %s\n", _("Search page for case-insensitive regex STRING"));
1287 printf (" %s\n", "--invert-regex");
1288 printf (" %s\n", _("Return CRITICAL if found, OK if not\n"));
1290 printf (" %s\n", "-a, --authorization=AUTH_PAIR");
1291 printf (" %s\n", _("Username:password on sites with basic authentication"));
1292 printf (" %s\n", "-A, --useragent=STRING");
1293 printf (" %s\n", _("String to be sent in http header as \"User Agent\""));
1294 printf (" %s\n", "-k, --header=STRING");
1295 printf (" %s\n", _(" Any other tags to be sent in http header. Use multiple times for additional headers"));
1296 printf (" %s\n", "-L, --link");
1297 printf (" %s\n", _("Wrap output in HTML link (obsoleted by urlize)"));
1298 printf (" %s\n", "-f, --onredirect=<ok|warning|critical|follow>");
1299 printf (" %s\n", _("How to handle redirected pages"));
1300 printf (" %s\n", "-m, --pagesize=INTEGER<:INTEGER>");
1301 printf (" %s\n", _("Minimum page size required (bytes) : Maximum page size required (bytes)"));
1303 printf (_(UT_WARN_CRIT));
1305 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
1307 printf (_(UT_VERBOSE));
1309 printf ("\n");
1310 printf ("%s\n", _("Notes:"));
1311 printf (" %s\n", _("This plugin will attempt to open an HTTP connection with the host."));
1312 printf (" %s\n", _("Successful connects return STATE_OK, refusals and timeouts return STATE_CRITICAL"));
1313 printf (" %s\n", _("other errors return STATE_UNKNOWN. Successful connects, but incorrect reponse"));
1314 printf (" %s\n", _("messages from the host result in STATE_WARNING return values. If you are"));
1315 printf (" %s\n", _("checking a virtual server that uses 'host headers' you must supply the FQDN"));
1316 printf (" %s\n", _("(fully qualified domain name) as the [host_name] argument."));
1317 printf ("\n");
1318 printf (_(UT_EXTRA_OPTS_NOTES));
1320 #ifdef HAVE_SSL
1321 printf ("\n");
1322 printf (" %s\n", _("This plugin can also check whether an SSL enabled web server is able to"));
1323 printf (" %s\n", _("serve content (optionally within a specified time) or whether the X509 "));
1324 printf (" %s\n", _("certificate is still valid for the specified number of days."));
1325 printf ("\n");
1326 printf ("%s\n", _("Examples:"));
1327 printf (" %s\n\n", "CHECK CONTENT: check_http -w 5 -c 10 --ssl -H www.verisign.com");
1328 printf (" %s\n", _("When the 'www.verisign.com' server returns its content within 5 seconds,"));
1329 printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
1330 printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
1331 printf (" %s\n\n", _("a STATE_CRITICAL will be returned."));
1333 printf (" %s\n\n", "CHECK CERTIFICATE: check_http -H www.verisign.com -C 14");
1334 printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 14 days,"));
1335 printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
1336 printf (" %s\n", _("14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when"));
1337 printf (" %s\n", _("the certificate is expired."));
1338 #endif
1340 printf (_(UT_SUPPORT));
1342 }
1346 void
1347 print_usage (void)
1348 {
1349 printf (_("Usage:"));
1350 printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname);
1351 printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]\n");
1352 printf (" [-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]\n");
1353 printf (" [-s string] [-l] [-r <regex> | -R <case-insensitive regex>] [-P string]\n");
1354 printf (" [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>] [-A string]\n");
1355 printf (" [-k string] [-S] [-C <age>] [-T <content-type>]\n");
1356 }