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 }
576 /* Checks if the server 'reply' is one of the expected 'statuscodes' */
577 static int
578 expected_statuscode (const char *reply, const char *statuscodes)
579 {
580 char *expected, *code;
581 int result = 0;
583 if ((expected = strdup (statuscodes)) == NULL)
584 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Memory allocation error\n"));
586 for (code = strtok (expected, ","); code != NULL; code = strtok (NULL, ","))
587 if (strstr (reply, code) != NULL) {
588 result = 1;
589 break;
590 }
592 free (expected);
593 return result;
594 }
596 static void
597 check_document_dates (const char *headers)
598 {
599 const char *s;
600 char *server_date = 0;
601 char *document_date = 0;
603 s = headers;
604 while (*s) {
605 const char *field = s;
606 const char *value = 0;
608 /* Find the end of the header field */
609 while (*s && !isspace(*s) && *s != ':')
610 s++;
612 /* Remember the header value, if any. */
613 if (*s == ':')
614 value = ++s;
616 /* Skip to the end of the header, including continuation lines. */
617 while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
618 s++;
620 /* Avoid stepping over end-of-string marker */
621 if (*s)
622 s++;
624 /* Process this header. */
625 if (value && value > field+2) {
626 char *ff = (char *) malloc (value-field);
627 char *ss = ff;
628 while (field < value-1)
629 *ss++ = tolower(*field++);
630 *ss++ = 0;
632 if (!strcmp (ff, "date") || !strcmp (ff, "last-modified")) {
633 const char *e;
634 while (*value && isspace (*value))
635 value++;
636 for (e = value; *e && *e != '\r' && *e != '\n'; e++)
637 ;
638 ss = (char *) malloc (e - value + 1);
639 strncpy (ss, value, e - value);
640 ss[e - value] = 0;
641 if (!strcmp (ff, "date")) {
642 if (server_date) free (server_date);
643 server_date = ss;
644 } else {
645 if (document_date) free (document_date);
646 document_date = ss;
647 }
648 }
649 free (ff);
650 }
651 }
653 /* Done parsing the body. Now check the dates we (hopefully) parsed. */
654 if (!server_date || !*server_date) {
655 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Server date unknown\n"));
656 } else if (!document_date || !*document_date) {
657 die (STATE_CRITICAL, _("HTTP CRITICAL - Document modification date unknown\n"));
658 } else {
659 time_t srv_data = parse_time_string (server_date);
660 time_t doc_data = parse_time_string (document_date);
662 if (srv_data <= 0) {
663 die (STATE_CRITICAL, _("HTTP CRITICAL - Server date \"%100s\" unparsable"), server_date);
664 } else if (doc_data <= 0) {
665 die (STATE_CRITICAL, _("HTTP CRITICAL - Document date \"%100s\" unparsable"), document_date);
666 } else if (doc_data > srv_data + 30) {
667 die (STATE_CRITICAL, _("HTTP CRITICAL - Document is %d seconds in the future\n"), (int)doc_data - (int)srv_data);
668 } else if (doc_data < srv_data - maximum_age) {
669 int n = (srv_data - doc_data);
670 if (n > (60 * 60 * 24 * 2))
671 die (STATE_CRITICAL,
672 _("HTTP CRITICAL - Last modified %.1f days ago\n"),
673 ((float) n) / (60 * 60 * 24));
674 else
675 die (STATE_CRITICAL,
676 _("HTTP CRITICAL - Last modified %d:%02d:%02d ago\n"),
677 n / (60 * 60), (n / 60) % 60, n % 60);
678 }
680 free (server_date);
681 free (document_date);
682 }
683 }
685 int
686 get_content_length (const char *headers)
687 {
688 const char *s;
689 int content_length = 0;
691 s = headers;
692 while (*s) {
693 const char *field = s;
694 const char *value = 0;
696 /* Find the end of the header field */
697 while (*s && !isspace(*s) && *s != ':')
698 s++;
700 /* Remember the header value, if any. */
701 if (*s == ':')
702 value = ++s;
704 /* Skip to the end of the header, including continuation lines. */
705 while (*s && !(*s == '\n' && (s[1] != ' ' && s[1] != '\t')))
706 s++;
707 s++;
709 /* Process this header. */
710 if (value && value > field+2) {
711 char *ff = (char *) malloc (value-field);
712 char *ss = ff;
713 while (field < value-1)
714 *ss++ = tolower(*field++);
715 *ss++ = 0;
717 if (!strcmp (ff, "content-length")) {
718 const char *e;
719 while (*value && isspace (*value))
720 value++;
721 for (e = value; *e && *e != '\r' && *e != '\n'; e++)
722 ;
723 ss = (char *) malloc (e - value + 1);
724 strncpy (ss, value, e - value);
725 ss[e - value] = 0;
726 content_length = atoi(ss);
727 free (ss);
728 }
729 free (ff);
730 }
731 }
732 return (content_length);
733 }
735 int
736 check_http (void)
737 {
738 char *msg;
739 char *status_line;
740 char *status_code;
741 char *header;
742 char *page;
743 char *auth;
744 int http_status;
745 int i = 0;
746 size_t pagesize = 0;
747 char *full_page;
748 char *buf;
749 char *pos;
750 long microsec;
751 double elapsed_time;
752 int page_len = 0;
753 int result = STATE_UNKNOWN;
755 /* try to connect to the host at the given port number */
756 if (my_tcp_connect (server_address, server_port, &sd) != STATE_OK)
757 die (STATE_CRITICAL, _("HTTP CRITICAL - Unable to open TCP socket\n"));
758 #ifdef HAVE_SSL
759 if (use_ssl == TRUE) {
760 np_net_ssl_init(sd);
761 if (check_cert == TRUE) {
762 result = np_net_ssl_check_cert(days_till_exp);
763 np_net_ssl_cleanup();
764 if (sd) close(sd);
765 return result;
766 }
767 }
768 #endif /* HAVE_SSL */
770 /* If a hostname is provided, use HTTP/1.1 and send the hostname before the
771 * Useragent. This fixes an issue with getting 301 responses from servers
772 * with virtual hosts */
773 if (host_name)
774 asprintf (&buf, "%s %s HTTP/1.1\r\nHost: %s\r\n%s\r\n", http_method, server_url, host_name, user_agent);
775 else
776 asprintf (&buf, "%s %s HTTP/1.0\r\n%s\r\n", http_method, server_url, user_agent);
778 /* tell HTTP/1.1 servers not to keep the connection alive */
779 asprintf (&buf, "%sConnection: close\r\n", buf);
781 /* optionally send any other header tag */
782 if (http_opt_headers_count) {
783 for (i = 0; i < http_opt_headers_count ; i++) {
784 for ((pos = strtok(http_opt_headers[i], INPUT_DELIMITER)); pos; (pos = strtok(NULL, INPUT_DELIMITER)))
785 asprintf (&buf, "%s%s\r\n", buf, pos);
786 }
787 free(http_opt_headers);
788 }
790 /* optionally send the authentication info */
791 if (strlen(user_auth)) {
792 base64_encode_alloc (user_auth, strlen (user_auth), &auth);
793 asprintf (&buf, "%sAuthorization: Basic %s\r\n", buf, auth);
794 }
796 /* either send http POST data */
797 if (http_post_data) {
798 if (http_content_type) {
799 asprintf (&buf, "%sContent-Type: %s\r\n", buf, http_content_type);
800 } else {
801 asprintf (&buf, "%sContent-Type: application/x-www-form-urlencoded\r\n", buf);
802 }
804 asprintf (&buf, "%sContent-Length: %i\r\n\r\n", buf, (int)strlen (http_post_data));
805 asprintf (&buf, "%s%s%s", buf, http_post_data, CRLF);
806 }
807 else {
808 /* or just a newline so the server knows we're done with the request */
809 asprintf (&buf, "%s%s", buf, CRLF);
810 }
812 if (verbose) printf ("%s\n", buf);
813 my_send (buf, strlen (buf));
815 /* fetch the page */
816 full_page = strdup("");
817 while ((i = my_recv (buffer, MAX_INPUT_BUFFER-1)) > 0) {
818 buffer[i] = '\0';
819 asprintf (&full_page, "%s%s", full_page, buffer);
820 pagesize += i;
822 if (no_body && document_headers_done (full_page)) {
823 i = 0;
824 break;
825 }
826 }
828 if (i < 0 && errno != ECONNRESET) {
829 #ifdef HAVE_SSL
830 /*
831 if (use_ssl) {
832 sslerr=SSL_get_error(ssl, i);
833 if ( sslerr == SSL_ERROR_SSL ) {
834 die (STATE_WARNING, _("HTTP WARNING - Client Certificate Required\n"));
835 } else {
836 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
837 }
838 }
839 else {
840 */
841 #endif
842 die (STATE_CRITICAL, _("HTTP CRITICAL - Error on receive\n"));
843 #ifdef HAVE_SSL
844 /* XXX
845 }
846 */
847 #endif
848 }
850 /* return a CRITICAL status if we couldn't read any data */
851 if (pagesize == (size_t) 0)
852 die (STATE_CRITICAL, _("HTTP CRITICAL - No data received from host\n"));
854 /* close the connection */
855 #ifdef HAVE_SSL
856 np_net_ssl_cleanup();
857 #endif
858 if (sd) close(sd);
860 /* reset the alarm */
861 alarm (0);
863 /* leave full_page untouched so we can free it later */
864 page = full_page;
866 if (verbose)
867 printf ("%s://%s:%d%s is %d characters\n",
868 use_ssl ? "https" : "http", server_address,
869 server_port, server_url, (int)pagesize);
871 /* find status line and null-terminate it */
872 status_line = page;
873 page += (size_t) strcspn (page, "\r\n");
874 pos = page;
875 page += (size_t) strspn (page, "\r\n");
876 status_line[strcspn(status_line, "\r\n")] = 0;
877 strip (status_line);
878 if (verbose)
879 printf ("STATUS: %s\n", status_line);
881 /* find header info and null-terminate it */
882 header = page;
883 while (strcspn (page, "\r\n") > 0) {
884 page += (size_t) strcspn (page, "\r\n");
885 pos = page;
886 if ((strspn (page, "\r") == 1 && strspn (page, "\r\n") >= 2) ||
887 (strspn (page, "\n") == 1 && strspn (page, "\r\n") >= 2))
888 page += (size_t) 2;
889 else
890 page += (size_t) 1;
891 }
892 page += (size_t) strspn (page, "\r\n");
893 header[pos - header] = 0;
894 if (verbose)
895 printf ("**** HEADER ****\n%s\n**** CONTENT ****\n%s\n", header,
896 (no_body ? " [[ skipped ]]" : page));
898 /* make sure the status line matches the response we are looking for */
899 if (!expected_statuscode (status_line, server_expect)) {
900 if (server_port == HTTP_PORT)
901 asprintf (&msg,
902 _("Invalid HTTP response received from host: %s\n"),
903 status_line);
904 else
905 asprintf (&msg,
906 _("Invalid HTTP response received from host on port %d: %s\n"),
907 server_port, status_line);
908 die (STATE_CRITICAL, "HTTP CRITICAL - %s", msg);
909 }
911 /* Exit here if server_expect was set by user and not default */
912 if ( server_expect_yn ) {
913 asprintf (&msg,
914 _("HTTP OK: Status line output matched \"%s\"\n"),
915 server_expect);
916 if (verbose)
917 printf ("%s\n",msg);
918 }
919 else {
920 /* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF */
921 /* HTTP-Version = "HTTP" "/" 1*DIGIT "." 1*DIGIT */
922 /* Status-Code = 3 DIGITS */
924 status_code = strchr (status_line, ' ') + sizeof (char);
925 if (strspn (status_code, "1234567890") != 3)
926 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status Line (%s)\n"), status_line);
928 http_status = atoi (status_code);
930 /* check the return code */
932 if (http_status >= 600 || http_status < 100)
933 die (STATE_CRITICAL, _("HTTP CRITICAL: Invalid Status (%s)\n"), status_line);
935 /* server errors result in a critical state */
936 else if (http_status >= 500)
937 die (STATE_CRITICAL, _("HTTP CRITICAL: %s\n"), status_line);
939 /* client errors result in a warning state */
940 else if (http_status >= 400)
941 die (STATE_WARNING, _("HTTP WARNING: %s\n"), status_line);
943 /* check redirected page if specified */
944 else if (http_status >= 300) {
946 if (onredirect == STATE_DEPENDENT)
947 redir (header, status_line);
948 else if (onredirect == STATE_UNKNOWN)
949 printf (_("HTTP UNKNOWN"));
950 else if (onredirect == STATE_OK)
951 printf (_("HTTP OK"));
952 else if (onredirect == STATE_WARNING)
953 printf (_("HTTP WARNING"));
954 else if (onredirect == STATE_CRITICAL)
955 printf (_("HTTP CRITICAL"));
956 microsec = deltime (tv);
957 elapsed_time = (double)microsec / 1.0e6;
958 die (onredirect,
959 _(" - %s - %.3f second response time %s|%s %s\n"),
960 status_line, elapsed_time,
961 (display_html ? "</A>" : ""),
962 perfd_time (elapsed_time), perfd_size (pagesize));
963 } /* end if (http_status >= 300) */
965 } /* end else (server_expect_yn) */
967 if (maximum_age >= 0) {
968 check_document_dates (header);
969 }
971 /* check elapsed time */
972 microsec = deltime (tv);
973 elapsed_time = (double)microsec / 1.0e6;
974 asprintf (&msg,
975 _(" - %s - %.3f second response time %s|%s %s\n"),
976 status_line, elapsed_time,
977 (display_html ? "</A>" : ""),
978 perfd_time (elapsed_time), perfd_size (pagesize));
979 if (check_critical_time == TRUE && elapsed_time > critical_time)
980 die (STATE_CRITICAL, "HTTP %s: %s", _("CRITICAL"), msg);
981 if (check_warning_time == TRUE && elapsed_time > warning_time)
982 die (STATE_WARNING, "HTTP %s: %s", _("WARNING"), msg);
984 /* Page and Header content checks go here */
985 /* these checks should be last */
987 if (strlen (string_expect)) {
988 if (strstr (page, string_expect)) {
989 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
990 status_line, elapsed_time,
991 (display_html ? "</A>" : ""),
992 perfd_time (elapsed_time), perfd_size (pagesize));
993 exit (STATE_OK);
994 }
995 else {
996 printf (_("HTTP CRITICAL - string not found%s|%s %s\n"),
997 (display_html ? "</A>" : ""),
998 perfd_time (elapsed_time), perfd_size (pagesize));
999 exit (STATE_CRITICAL);
1000 }
1001 }
1003 if (strlen (regexp)) {
1004 errcode = regexec (&preg, page, REGS, pmatch, 0);
1005 if ((errcode == 0 && invert_regex == 0) || (errcode == REG_NOMATCH && invert_regex == 1)) {
1006 printf (_("HTTP OK %s - %.3f second response time %s|%s %s\n"),
1007 status_line, elapsed_time,
1008 (display_html ? "</A>" : ""),
1009 perfd_time (elapsed_time), perfd_size (pagesize));
1010 exit (STATE_OK);
1011 }
1012 else if ((errcode == REG_NOMATCH && invert_regex == 0) || (errcode == 0 && invert_regex == 1)) {
1013 if (invert_regex == 0)
1014 msg = strdup(_("pattern not found"));
1015 else
1016 msg = strdup(_("pattern found"));
1017 printf (("%s - %s%s|%s %s\n"),
1018 _("HTTP CRITICAL"),
1019 msg,
1020 (display_html ? "</A>" : ""),
1021 perfd_time (elapsed_time), perfd_size (pagesize));
1022 exit (STATE_CRITICAL);
1023 }
1024 else {
1025 regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
1026 printf (_("HTTP CRITICAL - Execute Error: %s\n"), errbuf);
1027 exit (STATE_CRITICAL);
1028 }
1029 }
1031 /* make sure the page is of an appropriate size */
1032 /* page_len = get_content_length(header); */
1033 page_len = pagesize;
1034 if ((max_page_len > 0) && (page_len > max_page_len)) {
1035 printf (_("HTTP WARNING: page size %d too large%s|%s\n"),
1036 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1037 exit (STATE_WARNING);
1038 } else if ((min_page_len > 0) && (page_len < min_page_len)) {
1039 printf (_("HTTP WARNING: page size %d too small%s|%s\n"),
1040 page_len, (display_html ? "</A>" : ""), perfd_size (page_len) );
1041 exit (STATE_WARNING);
1042 }
1043 /* We only get here if all tests have been passed */
1044 asprintf (&msg, _("HTTP OK %s - %d bytes in %.3f seconds %s|%s %s\n"),
1045 status_line, page_len, elapsed_time,
1046 (display_html ? "</A>" : ""),
1047 perfd_time (elapsed_time), perfd_size (page_len));
1048 die (STATE_OK, "%s", msg);
1049 return STATE_UNKNOWN;
1050 }
1054 /* per RFC 2396 */
1055 #define URI_HTTP "%5[HTPShtps]"
1056 #define URI_HOST "%255[-.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1057 #define URI_PORT "%6d" /* MAX_PORT's width is 5 chars, 6 to detect overflow */
1058 #define URI_PATH "%[-_.!~*'();/?:@&=+$,%#abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]"
1059 #define HD1 URI_HTTP "://" URI_HOST ":" URI_PORT "/" URI_PATH
1060 #define HD2 URI_HTTP "://" URI_HOST "/" URI_PATH
1061 #define HD3 URI_HTTP "://" URI_HOST ":" URI_PORT
1062 #define HD4 URI_HTTP "://" URI_HOST
1063 #define HD5 URI_PATH
1065 void
1066 redir (char *pos, char *status_line)
1067 {
1068 int i = 0;
1069 char *x;
1070 char xx[2];
1071 char type[6];
1072 char *addr;
1073 char *url;
1075 addr = malloc (MAX_IPV4_HOSTLENGTH + 1);
1076 if (addr == NULL)
1077 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate addr\n"));
1079 url = malloc (strcspn (pos, "\r\n"));
1080 if (url == NULL)
1081 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate url\n"));
1083 while (pos) {
1084 sscanf (pos, "%1[Ll]%*1[Oo]%*1[Cc]%*1[Aa]%*1[Tt]%*1[Ii]%*1[Oo]%*1[Nn]:%n", xx, &i);
1085 if (i == 0) {
1086 pos += (size_t) strcspn (pos, "\r\n");
1087 pos += (size_t) strspn (pos, "\r\n");
1088 if (strlen(pos) == 0)
1089 die (STATE_UNKNOWN,
1090 _("HTTP UNKNOWN - Could not find redirect location - %s%s\n"),
1091 status_line, (display_html ? "</A>" : ""));
1092 continue;
1093 }
1095 pos += i;
1096 pos += strspn (pos, " \t");
1098 /*
1099 * RFC 2616 (4.2): ``Header fields can be extended over multiple lines by
1100 * preceding each extra line with at least one SP or HT.''
1101 */
1102 for (; (i = strspn (pos, "\r\n")); pos += i) {
1103 pos += i;
1104 if (!(i = strspn (pos, " \t"))) {
1105 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Empty redirect location%s\n"),
1106 display_html ? "</A>" : "");
1107 }
1108 }
1110 url = realloc (url, strcspn (pos, "\r\n") + 1);
1111 if (url == NULL)
1112 die (STATE_UNKNOWN, _("HTTP UNKNOWN - could not allocate url\n"));
1114 /* URI_HTTP, URI_HOST, URI_PORT, URI_PATH */
1115 if (sscanf (pos, HD1, type, addr, &i, url) == 4)
1116 use_ssl = server_type_check (type);
1118 /* URI_HTTP URI_HOST URI_PATH */
1119 else if (sscanf (pos, HD2, type, addr, url) == 3 ) {
1120 use_ssl = server_type_check (type);
1121 i = server_port_check (use_ssl);
1122 }
1124 /* URI_HTTP URI_HOST URI_PORT */
1125 else if (sscanf (pos, HD3, type, addr, &i) == 3) {
1126 strcpy (url, HTTP_URL);
1127 use_ssl = server_type_check (type);
1128 }
1130 /* URI_HTTP URI_HOST */
1131 else if (sscanf (pos, HD4, type, addr) == 2) {
1132 strcpy (url, HTTP_URL);
1133 use_ssl = server_type_check (type);
1134 i = server_port_check (use_ssl);
1135 }
1137 /* URI_PATH */
1138 else if (sscanf (pos, HD5, url) == 1) {
1139 /* relative url */
1140 if ((url[0] != '/')) {
1141 if ((x = strrchr(server_url, '/')))
1142 *x = '\0';
1143 asprintf (&url, "%s/%s", server_url, url);
1144 }
1145 i = server_port;
1146 strcpy (type, server_type);
1147 strcpy (addr, host_name ? host_name : server_address);
1148 }
1150 else {
1151 die (STATE_UNKNOWN,
1152 _("HTTP UNKNOWN - Could not parse redirect location - %s%s\n"),
1153 pos, (display_html ? "</A>" : ""));
1154 }
1156 break;
1158 } /* end while (pos) */
1160 if (++redir_depth > max_depth)
1161 die (STATE_WARNING,
1162 _("HTTP WARNING - maximum redirection depth %d exceeded - %s://%s:%d%s%s\n"),
1163 max_depth, type, addr, i, url, (display_html ? "</A>" : ""));
1165 if (server_port==i &&
1166 !strcmp(server_address, addr) &&
1167 (host_name && !strcmp(host_name, addr)) &&
1168 !strcmp(server_url, url))
1169 die (STATE_WARNING,
1170 _("HTTP WARNING - redirection creates an infinite loop - %s://%s:%d%s%s\n"),
1171 type, addr, i, url, (display_html ? "</A>" : ""));
1173 strcpy (server_type, type);
1175 free (host_name);
1176 host_name = strdup (addr);
1178 free (server_address);
1179 server_address = strdup (addr);
1181 free (server_url);
1182 if ((url[0] == '/'))
1183 server_url = strdup (url);
1184 else if (asprintf(&server_url, "/%s", url) == -1)
1185 die (STATE_UNKNOWN, _("HTTP UNKNOWN - Could not allocate server_url%s\n"),
1186 display_html ? "</A>" : "");
1187 free(url);
1189 if ((server_port = i) > MAX_PORT)
1190 die (STATE_UNKNOWN,
1191 _("HTTP UNKNOWN - Redirection to port above %d - %s://%s:%d%s%s\n"),
1192 MAX_PORT, server_type, server_address, server_port, server_url,
1193 display_html ? "</A>" : "");
1195 if (verbose)
1196 printf (_("Redirection to %s://%s:%d%s\n"), server_type,
1197 host_name ? host_name : server_address, server_port, server_url);
1199 check_http ();
1200 }
1204 int
1205 server_type_check (const char *type)
1206 {
1207 if (strcmp (type, "https"))
1208 return FALSE;
1209 else
1210 return TRUE;
1211 }
1213 int
1214 server_port_check (int ssl_flag)
1215 {
1216 if (ssl_flag)
1217 return HTTPS_PORT;
1218 else
1219 return HTTP_PORT;
1220 }
1222 char *perfd_time (double elapsed_time)
1223 {
1224 return fperfdata ("time", elapsed_time, "s",
1225 check_warning_time, warning_time,
1226 check_critical_time, critical_time,
1227 TRUE, 0, FALSE, 0);
1228 }
1232 char *perfd_size (int page_len)
1233 {
1234 return perfdata ("size", page_len, "B",
1235 (min_page_len>0?TRUE:FALSE), min_page_len,
1236 (min_page_len>0?TRUE:FALSE), 0,
1237 TRUE, 0, FALSE, 0);
1238 }
1240 void
1241 print_help (void)
1242 {
1243 print_revision (progname, revision);
1245 printf ("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
1246 printf (COPYRIGHT, copyright, email);
1248 printf ("%s\n", _("This plugin tests the HTTP service on the specified host. It can test"));
1249 printf ("%s\n", _("normal (http) and secure (https) servers, follow redirects, search for"));
1250 printf ("%s\n", _("strings and regular expressions, check connection times, and report on"));
1251 printf ("%s\n", _("certificate expiration times."));
1253 printf ("\n\n");
1255 print_usage ();
1257 printf (_("NOTE: One or both of -H and -I must be specified"));
1259 printf ("\n");
1261 printf (_(UT_HELP_VRSN));
1262 printf (_(UT_EXTRA_OPTS));
1264 printf (" %s\n", "-H, --hostname=ADDRESS");
1265 printf (" %s\n", _("Host name argument for servers using host headers (virtual host)"));
1266 printf (" %s\n", _("Append a port to include it in the header (eg: example.com:5000)"));
1267 printf (" %s\n", "-I, --IP-address=ADDRESS");
1268 printf (" %s\n", _("IP address or name (use numeric address if possible to bypass DNS lookup)."));
1269 printf (" %s\n", "-p, --port=INTEGER");
1270 printf (" %s", _("Port number (default: "));
1271 printf ("%d)\n", HTTP_PORT);
1273 printf (_(UT_IPv46));
1275 #ifdef HAVE_SSL
1276 printf (" %s\n", "-S, --ssl");
1277 printf (" %s\n", _("Connect via SSL. Port defaults to 443"));
1278 printf (" %s\n", "-C, --certificate=INTEGER");
1279 printf (" %s\n", _("Minimum number of days a certificate has to be valid. Port defaults to 443"));
1280 printf (" %s\n", _("(when this option is used the url is not checked.)\n"));
1281 #endif
1283 printf (" %s\n", "-e, --expect=STRING");
1284 printf (" %s\n", _("Comma-delimited list of strings, at least one of them is expected in"));
1285 printf (" %s", _("the first (status) line of the server response (default: "));
1286 printf ("%s)\n", HTTP_EXPECT);
1287 printf (" %s\n", _("If specified skips all other status line logic (ex: 3xx, 4xx, 5xx processing)"));
1288 printf (" %s\n", "-s, --string=STRING");
1289 printf (" %s\n", _("String to expect in the content"));
1290 printf (" %s\n", "-u, --url=PATH");
1291 printf (" %s\n", _("URL to GET or POST (default: /)"));
1292 printf (" %s\n", "-P, --post=STRING");
1293 printf (" %s\n", _("URL encoded http POST data"));
1294 printf (" %s\n", "-N, --no-body");
1295 printf (" %s\n", _("Don't wait for document body: stop reading after headers."));
1296 printf (" %s\n", _("(Note that this still does an HTTP GET or POST, not a HEAD.)"));
1297 printf (" %s\n", "-M, --max-age=SECONDS");
1298 printf (" %s\n", _("Warn if document is more than SECONDS old. the number can also be of"));
1299 printf (" %s\n", _("the form \"10m\" for minutes, \"10h\" for hours, or \"10d\" for days."));
1300 printf (" %s\n", "-T, --content-type=STRING");
1301 printf (" %s\n", _("specify Content-Type header media type when POSTing\n"));
1303 printf (" %s\n", "-l, --linespan");
1304 printf (" %s\n", _("Allow regex to span newlines (must precede -r or -R)"));
1305 printf (" %s\n", "-r, --regex, --ereg=STRING");
1306 printf (" %s\n", _("Search page for regex STRING"));
1307 printf (" %s\n", "-R, --eregi=STRING");
1308 printf (" %s\n", _("Search page for case-insensitive regex STRING"));
1309 printf (" %s\n", "--invert-regex");
1310 printf (" %s\n", _("Return CRITICAL if found, OK if not\n"));
1312 printf (" %s\n", "-a, --authorization=AUTH_PAIR");
1313 printf (" %s\n", _("Username:password on sites with basic authentication"));
1314 printf (" %s\n", "-A, --useragent=STRING");
1315 printf (" %s\n", _("String to be sent in http header as \"User Agent\""));
1316 printf (" %s\n", "-k, --header=STRING");
1317 printf (" %s\n", _(" Any other tags to be sent in http header. Use multiple times for additional headers"));
1318 printf (" %s\n", "-L, --link");
1319 printf (" %s\n", _("Wrap output in HTML link (obsoleted by urlize)"));
1320 printf (" %s\n", "-f, --onredirect=<ok|warning|critical|follow>");
1321 printf (" %s\n", _("How to handle redirected pages"));
1322 printf (" %s\n", "-m, --pagesize=INTEGER<:INTEGER>");
1323 printf (" %s\n", _("Minimum page size required (bytes) : Maximum page size required (bytes)"));
1325 printf (_(UT_WARN_CRIT));
1327 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
1329 printf (_(UT_VERBOSE));
1331 printf ("\n");
1332 printf ("%s\n", _("Notes:"));
1333 printf (" %s\n", _("This plugin will attempt to open an HTTP connection with the host."));
1334 printf (" %s\n", _("Successful connects return STATE_OK, refusals and timeouts return STATE_CRITICAL"));
1335 printf (" %s\n", _("other errors return STATE_UNKNOWN. Successful connects, but incorrect reponse"));
1336 printf (" %s\n", _("messages from the host result in STATE_WARNING return values. If you are"));
1337 printf (" %s\n", _("checking a virtual server that uses 'host headers' you must supply the FQDN"));
1338 printf (" %s\n", _("(fully qualified domain name) as the [host_name] argument."));
1339 printf ("\n");
1340 printf (_(UT_EXTRA_OPTS_NOTES));
1342 #ifdef HAVE_SSL
1343 printf ("\n");
1344 printf (" %s\n", _("This plugin can also check whether an SSL enabled web server is able to"));
1345 printf (" %s\n", _("serve content (optionally within a specified time) or whether the X509 "));
1346 printf (" %s\n", _("certificate is still valid for the specified number of days."));
1347 printf ("\n");
1348 printf ("%s\n", _("Examples:"));
1349 printf (" %s\n\n", "CHECK CONTENT: check_http -w 5 -c 10 --ssl -H www.verisign.com");
1350 printf (" %s\n", _("When the 'www.verisign.com' server returns its content within 5 seconds,"));
1351 printf (" %s\n", _("a STATE_OK will be returned. When the server returns its content but exceeds"));
1352 printf (" %s\n", _("the 5-second threshold, a STATE_WARNING will be returned. When an error occurs,"));
1353 printf (" %s\n\n", _("a STATE_CRITICAL will be returned."));
1355 printf (" %s\n\n", "CHECK CERTIFICATE: check_http -H www.verisign.com -C 14");
1356 printf (" %s\n", _("When the certificate of 'www.verisign.com' is valid for more than 14 days,"));
1357 printf (" %s\n", _("a STATE_OK is returned. When the certificate is still valid, but for less than"));
1358 printf (" %s\n", _("14 days, a STATE_WARNING is returned. A STATE_CRITICAL will be returned when"));
1359 printf (" %s\n", _("the certificate is expired."));
1360 #endif
1362 printf (_(UT_SUPPORT));
1364 }
1368 void
1369 print_usage (void)
1370 {
1371 printf (_("Usage:"));
1372 printf (" %s -H <vhost> | -I <IP-address> [-u <uri>] [-p <port>]\n",progname);
1373 printf (" [-w <warn time>] [-c <critical time>] [-t <timeout>] [-L]\n");
1374 printf (" [-a auth] [-f <ok | warn | critcal | follow>] [-e <expect>]\n");
1375 printf (" [-s string] [-l] [-r <regex> | -R <case-insensitive regex>] [-P string]\n");
1376 printf (" [-m <min_pg_size>:<max_pg_size>] [-4|-6] [-N] [-M <age>] [-A string]\n");
1377 printf (" [-k string] [-S] [-C <age>] [-T <content-type>]\n");
1378 }