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 /* If a hostname is provided, use HTTP/1.1 and send the hostname before the
753 * Useragent. This fixes an issue with getting 301 responses from servers
754 * with virtual hosts */
755 if (host_name)
756 asprintf (&buf, "%s %s HTTP/1.1\r\nHost: %s\r\n%s\r\n", http_method, server_url, host_name, user_agent);
757 else
758 asprintf (&buf, "%s %s HTTP/1.0\r\n%s\r\n", http_method, server_url, user_agent);
760 /* tell HTTP/1.1 servers not to keep the connection alive */
761 asprintf (&buf, "%sConnection: close\r\n", buf);
763 /* optionally send any other header tag */
764 if (http_opt_headers_count) {
765 for (i = 0; i < http_opt_headers_count ; i++) {
766 for ((pos = strtok(http_opt_headers[i], INPUT_DELIMITER)); pos; (pos = strtok(NULL, INPUT_DELIMITER)))
767 asprintf (&buf, "%s%s\r\n", buf, pos);
768 }
769 free(http_opt_headers);
770 }
772 /* optionally send the authentication info */
773 if (strlen(user_auth)) {
774 base64_encode_alloc (user_auth, strlen (user_auth), &auth);
775 asprintf (&buf, "%sAuthorization: Basic %s\r\n", buf, auth);
776 }
778 /* either send http POST data */
779 if (http_post_data) {
780 if (http_content_type) {
781 asprintf (&buf, "%sContent-Type: %s\r\n", buf, http_content_type);
782 } else {
783 asprintf (&buf, "%sContent-Type: application/x-www-form-urlencoded\r\n", buf);
784 }
786 asprintf (&buf, "%sContent-Length: %i\r\n\r\n", buf, (int)strlen (http_post_data));
787 asprintf (&buf, "%s%s%s", buf, http_post_data, CRLF);
788 }
789 else {
790 /* or just a newline so the server knows we're done with the request */
791 asprintf (&buf, "%s%s", buf, CRLF);
792 }
794 if (verbose) printf ("%s\n", buf);
795 my_send (buf, strlen (buf));
797 /* fetch the page */
798 full_page = strdup("");
799 while ((i = my_recv (buffer, MAX_INPUT_BUFFER-1)) > 0) {
800 buffer[i] = '\0';
801 asprintf (&full_page, "%s%s", full_page, buffer);
802 pagesize += i;
804 if (no_body && document_headers_done (full_page)) {
805 i = 0;
806 break;
807 }
808 }
810 if (i < 0 && errno != ECONNRESET) {
811 #ifdef HAVE_SSL
812 /*
813 if (use_ssl) {
814 sslerr=SSL_get_error(ssl, i);
815 if ( sslerr == SSL_ERROR_SSL ) {
816 die (STATE_WARNING, _("HTTP WARNING - Client Certificate Required\n"));
817 } else {
818 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
819 }
820 }
821 else {
822 */
823 #endif
824 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
825 #ifdef HAVE_SSL
826 /* XXX
827 }
828 */
829 #endif
830 }
832 /* return a CRITICAL status if we couldn't read any data */
833 if (pagesize == (size_t) 0)
834 die (STATE_CRITICAL, _("HTTP CRITICAL - No data received from host\n"));
836 /* close the connection */
837 #ifdef HAVE_SSL
838 np_net_ssl_cleanup();
839 #endif
840 if (sd) close(sd);
842 /* reset the alarm */
843 alarm (0);
845 /* leave full_page untouched so we can free it later */
846 page = full_page;
848 if (verbose)
849 printf ("%s://%s:%d%s is %d characters\n",
850 use_ssl ? "https" : "http", server_address,
851 server_port, server_url, (int)pagesize);
853 /* find status line and null-terminate it */
854 status_line = page;
855 page += (size_t) strcspn (page, "\r\n");
856 pos = page;
857 page += (size_t) strspn (page, "\r\n");
858 status_line[strcspn(status_line, "\r\n")] = 0;
859 strip (status_line);
860 if (verbose)
861 printf ("STATUS: %s\n", status_line);
863 /* find header info and null-terminate it */
864 header = page;
865 while (strcspn (page, "\r\n") > 0) {
866 page += (size_t) strcspn (page, "\r\n");
867 pos = page;
868 if ((strspn (page, "\r") == 1 && strspn (page, "\r\n") >= 2) ||
869 (strspn (page, "\n") == 1 && strspn (page, "\r\n") >= 2))
870 page += (size_t) 2;
871 else
872 page += (size_t) 1;
873 }
874 page += (size_t) strspn (page, "\r\n");
875 header[pos - header] = 0;
876 if (verbose)
877 printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
878 (no_body ? " [[ skipped ]]" : page));
880 /* make sure the status line matches the response we are looking for */
881 if (!strstr (status_line, server_expect)) {
882 if (server_port == HTTP_PORT)
883 asprintf (&msg,
884 _("Invalid HTTP response received from host\n"));
885 else
886 asprintf (&msg,
887 _("Invalid HTTP response received from host on port %d\n"),
888 server_port);
889 die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
890 }
892 /* Exit here if server_expect was set by user and not default */
893 if ( server_expect_yn ) {
894 asprintf (&msg,
895 _("HTTP OK: Status line output matched \"%s\"\n"),
896 server_expect);
897 if (verbose)
898 printf ("%s\n",msg);
899 }
900 else {
901 /* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
902 /* HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
903 /* Status-Code = 3 DIGITS */
905 status_code = strchr (status_line, ' ') + sizeof (char);
906 if (strspn (status_code, "1234567890") != 3)
907 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);
909 http_status = atoi (status_code);
911 /* check the return code */
913 if (http_status >= 600 || http_status < 100)
914 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%s)\n"), status_line);
916 /* server errors result in a critical state */
917 else if (http_status >= 500)
918 die (STATE_CRITICAL, _("HTTP CRITICAL: %s\n"), status_line);
920 /* client errors result in a warning state */
921 else if (http_status >= 400)
922 die (STATE_WARNING, _("HTTP WARNING: %s\n"), status_line);
924 /* check redirected page if specified */
925 else if (http_status >= 300) {
927 if (onredirect == STATE_DEPENDENT)
928 redir (header, status_line);
929 else if (onredirect == STATE_UNKNOWN)
930 printf (_("HTTP UNKNOWN"));
931 else if (onredirect == STATE_OK)
932 printf (_("HTTP OK"));
933 else if (onredirect == STATE_WARNING)
934 printf (_("HTTP WARNING"));
935 else if (onredirect == STATE_CRITICAL)
936 printf (_("HTTP CRITICAL"));
937 microsec = deltime (tv);
938 elapsed_time = (double)microsec / 1.0e6;
939 die (onredirect,
940 _(" - %s - %.3f second response time %s|%s %s\n"),
941 status_line, elapsed_time,
942 (display_html ? "</A>" : ""),
943 perfd_time (elapsed_time), perfd_size (pagesize));
944 } /* end if (http_status >= 300) */
946 } /* end else (server_expect_yn) */
948 if (maximum_age >= 0) {
949 check_document_dates (header);
950 }
952 /* check elapsed time */
953 microsec = deltime (tv);
954 elapsed_time = (double)microsec / 1.0e6;
955 asprintf (&msg,
956 _(" - %s - %.3f second response time %s|%s %s\n"),
957 status_line, elapsed_time,
958 (display_html ? "</A>" : ""),
959 perfd_time (elapsed_time), perfd_size (pagesize));
960 if (check_critical_time == TRUE && elapsed_time > critical_time)
961 die (STATE_CRITICAL, "HTTP %s: %s", _("CRITICAL"), msg);
962 if (check_warning_time == TRUE && elapsed_time > warning_time)
963 die (STATE_WARNING, "HTTP %s: %s", _("WARNING"), msg);
965 /* Page and Header content checks go here */
966 /* these checks should be last */
968 if (strlen (string_expect)) {
969 if (strstr (page, string_expect)) {
970 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
971 status_line, elapsed_time,
972 (display_html ? "</A>" : ""),
973 perfd_time (elapsed_time), perfd_size (pagesize));
974 exit (STATE_OK);
975 }
976 else {
977 printf (_("HTTP CRITICAL - string not found%s|%s %s\n"),
978 (display_html ? "</A>" : ""),
979 perfd_time (elapsed_time), perfd_size (pagesize));
980 exit (STATE_CRITICAL);
981 }
982 }
984 if (strlen (regexp)) {
985 errcode = regexec (&preg, page, REGS, pmatch, 0);
986 if ((errcode == 0 && invert_regex == 0) || (errcode == REG_NOMATCH && invert_regex == 1)) {
987 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
988 status_line, elapsed_time,
989 (display_html ? "</A>" : ""),
990 perfd_time (elapsed_time), perfd_size (pagesize));
991 exit (STATE_OK);
992 }
993 else if ((errcode == REG_NOMATCH && invert_regex == 0) || (errcode == 0 && invert_regex == 1)) {
994 if (invert_regex == 0)
995 msg = strdup(_("pattern not found"));
996 else
997 msg = strdup(_("pattern found"));
998 printf (("%s - %s%s|%s %s\n"),
999 _("HTTP CRITICAL"),
1000 msg,
1001 (display_html ? "</A>" : ""),
1002 perfd_time (elapsed_time), perfd_size (pagesize));
1003 exit (STATE_CRITICAL);
1004 }
1005 else {
1006 regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
1007 printf (_("HTTP CRITICAL - Execute Error: %s\n"), errbuf);
1008 exit (STATE_CRITICAL);
1009 }
1010 }
1012 /* make sure the page is of an appropriate size */
1013 /* page_len = get_content_length(header); */
1014 page_len = pagesize;
1015 if ((max_page_len > 0) && (page_len > max_page_len)) {
1016 printf (_("HTTP WARNING: page size %d too large%s|%s\n"),
1017 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1018 exit (STATE_WARNING);
1019 } else if ((min_page_len > 0) && (page_len < min_page_len)) {
1020 printf (_("HTTP WARNING: page size %d too small%s|%s\n"),
1021 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1022 exit (STATE_WARNING);
1023 }
1024 /* We only get here if all tests have been passed */
1025 asprintf (&msg, _("HTTP OK %s - %d bytes in %.3f seconds %s|%s %s\n"),
1026 status_line, page_len, elapsed_time,
1027 (display_html ? "</A>" : ""),
1028 perfd_time (elapsed_time), perfd_size (page_len));
1029 die (STATE_OK, "%s", msg);
1030 return STATE_UNKNOWN;
1031 }
1035 /* per RFC 2396 */
1036 #define URI_HTTP "%5[HTPShtps]"
1037 #define URI_HOST "%255[-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1038 #define URI_PORT "%6d" /* MAX_PORT's width is 5 chars, 6 to detect overflow */
1039 #define URI_PATH "%[-_.!~*'();/?:@&=+$,%#abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1040 #define HD1 URI_HTTP "://" URI_HOST ":" URI_PORT "/" URI_PATH
1041 #define HD2 URI_HTTP "://" URI_HOST "/" URI_PATH
1042 #define HD3 URI_HTTP "://" URI_HOST ":" URI_PORT
1043 #define HD4 URI_HTTP "://" URI_HOST
1044 #define HD5 URI_PATH
1046 void
1047 redir (char *pos, char *status_line)
1048 {
1049 int i = 0;
1050 char *x;
1051 char xx[2];
1052 char type[6];
1053 char *addr;
1054 char *url;
1056 addr = malloc (MAX_IPV4_HOSTLENGTH + 1);
1057 if (addr == NULL)
1058 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate addr\n"));
1060 url = malloc (strcspn (pos, "\r\n"));
1061 if (url == NULL)
1062 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate url\n"));
1064 while (pos) {
1065 sscanf (pos, "%1[Ll]%*1[Oo]%*1[Cc]%*1[Aa]%*1[Tt]%*1[Ii]%*1[Oo]%*1[Nn]:%n", xx, &i);
1066 if (i == 0) {
1067 pos += (size_t) strcspn (pos, "\r\n");
1068 pos += (size_t) strspn (pos, "\r\n");
1069 if (strlen(pos) == 0)
1070 die (STATE_UNKNOWN,
1071 _("HTTP UNKNOWN - Could not find redirect location - %s%s\n"),
1072 status_line, (display_html ? "</A>" : ""));
1073 continue;
1074 }
1076 pos += i;
1077 pos += strspn (pos, " \t");
1079 /*
1080 * RFC 2616 (4.2): ``Header fields can be extended over multiple lines by
1081 * preceding each extra line with at least one SP or HT.''
1082 */
1083 for (; (i = strspn (pos, "\r\n")); pos += i) {
1084 pos += i;
1085 if (!(i = strspn (pos, " \t"))) {
1086 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Empty redirect location%s\n"),
1087 display_html ? "</A>" : "");
1088 }
1089 }
1091 url = realloc (url, strcspn (pos, "\r\n") + 1);
1092 if (url == NULL)
1093 die (STATE_UNKNOWN, _("HTTP UNKNOWN - could not allocate url\n"));
1095 /* URI_HTTP, URI_HOST, URI_PORT, URI_PATH */
1096 if (sscanf (pos, HD1, type, addr, &i, url) == 4)
1097 use_ssl = server_type_check (type);
1099 /* URI_HTTP URI_HOST URI_PATH */
1100 else if (sscanf (pos, HD2, type, addr, url) == 3 ) {
1101 use_ssl = server_type_check (type);
1102 i = server_port_check (use_ssl);
1103 }
1105 /* URI_HTTP URI_HOST URI_PORT */
1106 else if (sscanf (pos, HD3, type, addr, &i) == 3) {
1107 strcpy (url, HTTP_URL);
1108 use_ssl = server_type_check (type);
1109 }
1111 /* URI_HTTP URI_HOST */
1112 else if (sscanf (pos, HD4, type, addr) == 2) {
1113 strcpy (url, HTTP_URL);
1114 use_ssl = server_type_check (type);
1115 i = server_port_check (use_ssl);
1116 }
1118 /* URI_PATH */
1119 else if (sscanf (pos, HD5, url) == 1) {
1120 /* relative url */
1121 if ((url[0] != '/')) {
1122 if ((x = strrchr(server_url, '/')))
1123 *x = '\0';
1124 asprintf (&url, "%s/%s", server_url, url);
1125 }
1126 i = server_port;
1127 strcpy (type, server_type);
1128 strcpy (addr, host_name ? host_name : server_address);
1129 }
1131 else {
1132 die (STATE_UNKNOWN,
1133 _("HTTP UNKNOWN - Could not parse redirect location - %s%s\n"),
1134 pos, (display_html ? "</A>" : ""));
1135 }
1137 break;
1139 } /* end while (pos) */
1141 if (++redir_depth > max_depth)
1142 die (STATE_WARNING,
1143 _("HTTP WARNING - maximum redirection depth %d exceeded - %s://%s:%d%s%s\n"),
1144 max_depth, type, addr, i, url, (display_html ? "</A>" : ""));
1146 if (server_port==i &&
1147 !strcmp(server_address, addr) &&
1148 (host_name && !strcmp(host_name, addr)) &&
1149 !strcmp(server_url, url))
1150 die (STATE_WARNING,
1151 _("HTTP WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
1152 type, addr, i, url, (display_html ? "</A>" : ""));
1154 strcpy (server_type, type);
1156 free (host_name);
1157 host_name = strdup (addr);
1159 free (server_address);
1160 server_address = strdup (addr);
1162 free (server_url);
1163 if ((url[0] == '/'))
1164 server_url = strdup (url);
1165 else if (asprintf(&server_url, "/%s", url) == -1)
1166 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate server_url%s\n"),
1167 display_html ? "</A>" : "");
1168 free(url);
1170 if ((server_port = i) > MAX_PORT)
1171 die (STATE_UNKNOWN,
1172 _("HTTP UNKNOWN - Redirection to port above %d - %s://%s:%d%s%s\n"),
1173 MAX_PORT, server_type, server_address, server_port, server_url,
1174 display_html ? "</A>" : "");
1176 if (verbose)
1177 printf (_("Redirection to %s://%s:%d%s\n"), server_type,
1178 host_name ? host_name : server_address, server_port, server_url);
1180 check_http ();
1181 }
1185 int
1186 server_type_check (const char *type)
1187 {
1188 if (strcmp (type, "https"))
1189 return FALSE;
1190 else
1191 return TRUE;
1192 }
1194 int
1195 server_port_check (int ssl_flag)
1196 {
1197 if (ssl_flag)
1198 return HTTPS_PORT;
1199 else
1200 return HTTP_PORT;
1201 }
1203 char *perfd_time (double elapsed_time)
1204 {
1205 return fperfdata ("time", elapsed_time, "s",
1206 check_warning_time, warning_time,
1207 check_critical_time, critical_time,
1208 TRUE, 0, FALSE, 0);
1209 }
1213 char *perfd_size (int page_len)
1214 {
1215 return perfdata ("size", page_len, "B",
1216 (min_page_len>0?TRUE:FALSE), min_page_len,
1217 (min_page_len>0?TRUE:FALSE), 0,
1218 TRUE, 0, FALSE, 0);
1219 }
1221 void
1222 print_help (void)
1223 {
1224 print_revision (progname, revision);
1226 printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
1227 printf (COPYRIGHT, copyright, email);
1229 printf ("%s\n", _("This plugin tests the HTTP service on the specified host. It can test"));
1230 printf ("%s\n", _("normal (http) and secure (https) servers, follow redirects, search for"));
1231 printf ("%s\n", _("strings and regular expressions, check connection times, and report on"));
1232 printf ("%s\n", _("certificate expiration times."));
1234 printf ("\n\n");
1236 print_usage ();
1238 printf (_("NOTE: One or both of -H and -I must be specified"));
1240 printf ("\n");
1242 printf (_(UT_HELP_VRSN));
1243 printf (_(UT_EXTRA_OPTS));
1245 printf (" %s\n", "-H, --hostname=ADDRESS");
1246 printf (" %s\n", _("Host name argument for servers using host headers (virtual host)"));
1247 printf (" %s\n", _("Append a port to include it in the header (eg: example.com:5000)"));
1248 printf (" %s\n", "-I, --IP-address=ADDRESS");
1249 printf (" %s\n", _("IP address or name (use numeric address if possible to bypass DNS lookup)."));
1250 printf (" %s\n", "-p, --port=INTEGER");
1251 printf (" %s", _("Port number (default: "));
1252 printf ("%d)\n", HTTP_PORT);
1254 printf (_(UT_IPv46));
1256 #ifdef HAVE_SSL
1257 printf (" %s\n", "-S, --ssl");
1258 printf (" %s\n", _("Connect via SSL. Port defaults to 443"));
1259 printf (" %s\n", "-C, --certificate=INTEGER");
1260 printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
1261 printf (" %s\n", _("(when this option is used the url is not checked.)\n"));
1262 #endif
1264 printf (" %s\n", "-e, --expect=STRING");
1265 printf (" %s\n", _("String to expect in first (status) line of server response (default: "));
1266 printf ("%s)\n", HTTP_EXPECT);
1267 printf (" %s\n", _("If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)"));
1268 printf (" %s\n", "-s, --string=STRING");
1269 printf (" %s\n", _("String to expect in the content"));
1270 printf (" %s\n", "-u, --url=PATH");
1271 printf (" %s\n", _("URL to GET or POST (default: /)"));
1272 printf (" %s\n", "-P, --post=STRING");
1273 printf (" %s\n", _("URL encoded http POST data"));
1274 printf (" %s\n", "-N, --no-body");
1275 printf (" %s\n", _("Don't wait for document body: stop reading after headers."));
1276 printf (" %s\n", _("(Note that this still does an HTTP GET or POST, not a HEAD.)"));
1277 printf (" %s\n", "-M, --max-age=SECONDS");
1278 printf (" %s\n", _("Warn if document is more than SECONDS old. the number can also be of"));
1279 printf (" %s\n", _("the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days."));
1280 printf (" %s\n", "-T, --content-type=STRING");
1281 printf (" %s\n", _("specify Content-Type header media type when POSTing\n"));
1283 printf (" %s\n", "-l, --linespan");
1284 printf (" %s\n", _("Allow regex to span newlines (must precede -r or -R)"));
1285 printf (" %s\n", "-r, --regex, --ereg=STRING");
1286 printf (" %s\n", _("Search page for regex STRING"));
1287 printf (" %s\n", "-R, --eregi=STRING");
1288 printf (" %s\n", _("Search page for case-insensitive regex STRING"));
1289 printf (" %s\n", "--invert-regex");
1290 printf (" %s\n", _("Return CRITICAL if found, OK if not\n"));
1292 printf (" %s\n", "-a, --authorization=AUTH_PAIR");
1293 printf (" %s\n", _("Username:password on sites with basic authentication"));
1294 printf (" %s\n", "-A, --useragent=STRING");
1295 printf (" %s\n", _("String to be sent in http header as \"User Agent\""));
1296 printf (" %s\n", "-k, --header=STRING");
1297 printf (" %s\n", _(" Any other tags to be sent in http header. Use multiple times for additional headers"));
1298 printf (" %s\n", "-L, --link");
1299 printf (" %s\n", _("Wrap output in HTML link (obsoleted by urlize)"));
1300 printf (" %s\n", "-f, --onredirect=<ok|warning|critical|follow>");
1301 printf (" %s\n", _("How to handle redirected pages"));
1302 printf (" %s\n", "-m, --pagesize=INTEGER<:INTEGER>");
1303 printf (" %s\n", _("Minimum page size required (bytes) : Maximum page size required (bytes)"));
1305 printf (_(UT_WARN_CRIT));
1307 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
1309 printf (_(UT_VERBOSE));
1311 printf ("\n");
1312 printf ("%s\n", _("Notes:"));
1313 printf (" %s\n", _("This plugin will attempt to open an HTTP connection with the host."));
1314 printf (" %s\n", _("Successful connects return STATE_OK, refusals and timeouts return STATE_CRITICAL"));
1315 printf (" %s\n", _("other errors return STATE_UNKNOWN. Successful connects, but incorrect reponse"));
1316 printf (" %s\n", _("messages from the host result in STATE_WARNING return values. If you are"));
1317 printf (" %s\n", _("checking a virtual server that uses 'host headers' you must supply the FQDN"));
1318 printf (" %s\n", _("(fully qualified domain name) as the [host_name] argument."));
1319 printf ("\n");
1320 printf (_(UT_EXTRA_OPTS_NOTES));
1322 #ifdef HAVE_SSL
1323 printf ("\n");
1324 printf (" %s\n", _("This plugin can also check whether an SSL enabled web server is able to"));
1325 printf (" %s\n", _("serve content (optionally within a specified time) or whether the X509 "));
1326 printf (" %s\n", _("certificate is still valid for the specified number of days."));
1327 printf ("\n");
1328 printf ("%s\n", _("Examples:"));
1329 printf (" %s\n\n", "CHECK CONTENT: check_http -w 5 -c 10 --ssl -H www.verisign.com");
1330 printf (" %s\n", _("When the 'www.verisign.com' server returns its content within 5 seconds,"));
1331 printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
1332 printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
1333 printf (" %s\n\n", _("a STATE_CRITICAL will be returned."));
1335 printf (" %s\n\n", "CHECK CERTIFICATE: check_http -H www.verisign.com -C 14");
1336 printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 14 days,"));
1337 printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
1338 printf (" %s\n", _("14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when"));
1339 printf (" %s\n", _("the certificate is expired."));
1340 #endif
1342 printf (_(UT_SUPPORT));
1344 }
1348 void
1349 print_usage (void)
1350 {
1351 printf (_("Usage:"));
1352 printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname);
1353 printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]\n");
1354 printf (" [-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]\n");
1355 printf (" [-s string] [-l] [-r <regex> | -R <case-insensitive regex>] [-P string]\n");
1356 printf (" [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>] [-A string]\n");
1357 printf (" [-k string] [-S] [-C <age>] [-T <content-type>]\n");
1358 }