1 /*****************************************************************************
2 *
3 * Nagios check_ldap plugin
4 *
5 * License: GPL
6 * Copyright (c) 2000-2008 Nagios Plugins Development Team
7 *
8 * Description:
9 *
10 * This file contains the check_ldap plugin
11 *
12 *
13 * This program is free software: you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation, either version 3 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 *
26 *
27 *****************************************************************************/
29 /* progname may be check_ldaps */
30 char *progname = "check_ldap";
31 const char *copyright = "2000-2008";
32 const char *email = "nagiosplug-devel@lists.sourceforge.net";
34 #include "common.h"
35 #include "netutils.h"
36 #include "utils.h"
38 #include <lber.h>
39 #include <ldap.h>
41 enum {
42 UNDEFINED = 0,
43 #ifdef HAVE_LDAP_SET_OPTION
44 DEFAULT_PROTOCOL = 2,
45 #endif
46 DEFAULT_PORT = 389
47 };
49 int process_arguments (int, char **);
50 int validate_arguments (void);
51 void print_help (void);
52 void print_usage (void);
54 char ld_defattr[] = "(objectclass=*)";
55 char *ld_attr = ld_defattr;
56 char *ld_host = NULL;
57 char *ld_base = NULL;
58 char *ld_passwd = NULL;
59 char *ld_binddn = NULL;
60 int ld_port = DEFAULT_PORT;
61 #ifdef HAVE_LDAP_SET_OPTION
62 int ld_protocol = DEFAULT_PROTOCOL;
63 #endif
64 #ifndef LDAP_OPT_SUCCESS
65 # define LDAP_OPT_SUCCESS LDAP_SUCCESS
66 #endif
67 double warn_time = UNDEFINED;
68 double crit_time = UNDEFINED;
69 struct timeval tv;
70 int starttls = FALSE;
71 int ssl_on_connect = FALSE;
72 int verbose = 0;
74 /* for ldap tls */
76 char *SERVICE = "LDAP";
78 int
79 main (int argc, char *argv[])
80 {
82 LDAP *ld;
83 LDAPMessage *result;
85 /* should be int result = STATE_UNKNOWN; */
87 int status = STATE_UNKNOWN;
88 long microsec;
89 double elapsed_time;
91 /* for ldap tls */
93 int tls;
94 int version=3;
96 setlocale (LC_ALL, "");
97 bindtextdomain (PACKAGE, LOCALEDIR);
98 textdomain (PACKAGE);
100 if (strstr(argv[0],"check_ldaps")) {
101 asprintf (&progname, "check_ldaps");
102 }
104 /* Parse extra opts if any */
105 argv=np_extra_opts (&argc, argv, progname);
107 if (process_arguments (argc, argv) == ERROR)
108 usage4 (_("Could not parse arguments"));
110 if (strstr(argv[0],"check_ldaps") && ! starttls && ! ssl_on_connect)
111 starttls = TRUE;
113 /* initialize alarm signal handling */
114 signal (SIGALRM, socket_timeout_alarm_handler);
116 /* set socket timeout */
117 alarm (socket_timeout);
119 /* get the start time */
120 gettimeofday (&tv, NULL);
122 /* initialize ldap */
123 #ifdef HAVE_LDAP_INIT
124 if (!(ld = ldap_init (ld_host, ld_port))) {
125 printf ("Could not connect to the server at port %i\n", ld_port);
126 return STATE_CRITICAL;
127 }
128 #else
129 if (!(ld = ldap_open (ld_host, ld_port))) {
130 if (verbose)
131 ldap_perror(ld, "ldap_open");
132 printf (_("Could not connect to the server at port %i\n"), ld_port);
133 return STATE_CRITICAL;
134 }
135 #endif /* HAVE_LDAP_INIT */
137 #ifdef HAVE_LDAP_SET_OPTION
138 /* set ldap options */
139 if (ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &ld_protocol) !=
140 LDAP_OPT_SUCCESS ) {
141 printf(_("Could not set protocol version %d\n"), ld_protocol);
142 return STATE_CRITICAL;
143 }
144 #endif
146 if (ld_port == LDAPS_PORT || ssl_on_connect) {
147 asprintf (&SERVICE, "LDAPS");
148 #if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS)
149 /* ldaps: set option tls */
150 tls = LDAP_OPT_X_TLS_HARD;
152 if (ldap_set_option (ld, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
153 {
154 if (verbose)
155 ldap_perror(ld, "ldaps_option");
156 printf (_("Could not init TLS at port %i!\n"), ld_port);
157 return STATE_CRITICAL;
158 }
159 #else
160 printf (_("TLS not supported by the libraries!\n"));
161 return STATE_CRITICAL;
162 #endif /* LDAP_OPT_X_TLS */
163 } else if (starttls) {
164 asprintf (&SERVICE, "LDAP-TLS");
165 #if defined(HAVE_LDAP_SET_OPTION) && defined(HAVE_LDAP_START_TLS_S)
166 /* ldap with startTLS: set option version */
167 if (ldap_get_option(ld,LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS )
168 {
169 if (version < LDAP_VERSION3)
170 {
171 version = LDAP_VERSION3;
172 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &version);
173 }
174 }
175 /* call start_tls */
176 if (ldap_start_tls_s(ld, NULL, NULL) != LDAP_SUCCESS)
177 {
178 if (verbose)
179 ldap_perror(ld, "ldap_start_tls");
180 printf (_("Could not init startTLS at port %i!\n"), ld_port);
181 return STATE_CRITICAL;
182 }
183 #else
184 printf (_("startTLS not supported by the library, needs LDAPv3!\n"));
185 return STATE_CRITICAL;
186 #endif /* HAVE_LDAP_START_TLS_S */
187 }
189 /* bind to the ldap server */
190 if (ldap_bind_s (ld, ld_binddn, ld_passwd, LDAP_AUTH_SIMPLE) !=
191 LDAP_SUCCESS) {
192 if (verbose)
193 ldap_perror(ld, "ldap_bind");
194 printf (_("Could not bind to the LDAP server\n"));
195 return STATE_CRITICAL;
196 }
198 /* do a search of all objectclasses in the base dn */
199 if (ldap_search_s (ld, ld_base, LDAP_SCOPE_BASE, ld_attr, NULL, 0, &result)
200 != LDAP_SUCCESS) {
201 if (verbose)
202 ldap_perror(ld, "ldap_search");
203 printf (_("Could not search/find objectclasses in %s\n"), ld_base);
204 return STATE_CRITICAL;
205 }
207 /* unbind from the ldap server */
208 ldap_unbind (ld);
210 /* reset the alarm handler */
211 alarm (0);
213 /* calcutate the elapsed time and compare to thresholds */
215 microsec = deltime (tv);
216 elapsed_time = (double)microsec / 1.0e6;
218 if (crit_time!=UNDEFINED && elapsed_time>crit_time)
219 status = STATE_CRITICAL;
220 else if (warn_time!=UNDEFINED && elapsed_time>warn_time)
221 status = STATE_WARNING;
222 else
223 status = STATE_OK;
225 /* print out the result */
226 printf (_("LDAP %s - %.3f seconds response time|%s\n"),
227 state_text (status),
228 elapsed_time,
229 fperfdata ("time", elapsed_time, "s",
230 (int)warn_time, warn_time,
231 (int)crit_time, crit_time,
232 TRUE, 0, FALSE, 0));
234 return status;
235 }
237 /* process command-line arguments */
238 int
239 process_arguments (int argc, char **argv)
240 {
241 int c;
243 int option = 0;
244 /* initialize the long option struct */
245 static struct option longopts[] = {
246 {"help", no_argument, 0, 'h'},
247 {"version", no_argument, 0, 'V'},
248 {"timeout", required_argument, 0, 't'},
249 {"host", required_argument, 0, 'H'},
250 {"base", required_argument, 0, 'b'},
251 {"attr", required_argument, 0, 'a'},
252 {"bind", required_argument, 0, 'D'},
253 {"pass", required_argument, 0, 'P'},
254 #ifdef HAVE_LDAP_SET_OPTION
255 {"ver2", no_argument, 0, '2'},
256 {"ver3", no_argument, 0, '3'},
257 #endif
258 {"starttls", no_argument, 0, 'T'},
259 {"ssl", no_argument, 0, 'S'},
260 {"use-ipv4", no_argument, 0, '4'},
261 {"use-ipv6", no_argument, 0, '6'},
262 {"port", required_argument, 0, 'p'},
263 {"warn", required_argument, 0, 'w'},
264 {"crit", required_argument, 0, 'c'},
265 {"verbose", no_argument, 0, 'v'},
266 {0, 0, 0, 0}
267 };
269 if (argc < 2)
270 return ERROR;
272 for (c = 1; c < argc; c++) {
273 if (strcmp ("-to", argv[c]) == 0)
274 strcpy (argv[c], "-t");
275 }
277 while (1) {
278 c = getopt_long (argc, argv, "hvV234TS6t:c:w:H:b:p:a:D:P:", longopts, &option);
280 if (c == -1 || c == EOF)
281 break;
283 switch (c) {
284 case 'h': /* help */
285 print_help ();
286 exit (STATE_OK);
287 case 'V': /* version */
288 print_revision (progname, NP_VERSION);
289 exit (STATE_OK);
290 case 't': /* timeout period */
291 if (!is_intnonneg (optarg))
292 usage2 (_("Timeout interval must be a positive integer"), optarg);
293 else
294 socket_timeout = atoi (optarg);
295 break;
296 case 'H':
297 ld_host = optarg;
298 break;
299 case 'b':
300 ld_base = optarg;
301 break;
302 case 'p':
303 ld_port = atoi (optarg);
304 break;
305 case 'a':
306 ld_attr = optarg;
307 break;
308 case 'D':
309 ld_binddn = optarg;
310 break;
311 case 'P':
312 ld_passwd = optarg;
313 break;
314 case 'w':
315 warn_time = strtod (optarg, NULL);
316 break;
317 case 'c':
318 crit_time = strtod (optarg, NULL);
319 break;
320 #ifdef HAVE_LDAP_SET_OPTION
321 case '2':
322 ld_protocol = 2;
323 break;
324 case '3':
325 ld_protocol = 3;
326 break;
327 #endif
328 case '4':
329 address_family = AF_INET;
330 break;
331 case 'v':
332 verbose++;
333 break;
334 case 'T':
335 if (! ssl_on_connect)
336 starttls = TRUE;
337 else
338 usage_va(_("%s cannot be combined with %s"), "-T/--starttls", "-S/--ssl");
339 break;
340 case 'S':
341 if (! starttls) {
342 ssl_on_connect = TRUE;
343 ld_port = LDAPS_PORT;
344 } else
345 usage_va(_("%s cannot be combined with %s"), "-S/--ssl", "-T/--starttls");
346 break;
347 case '6':
348 #ifdef USE_IPV6
349 address_family = AF_INET6;
350 #else
351 usage (_("IPv6 support not available\n"));
352 #endif
353 break;
354 default:
355 usage5 ();
356 }
357 }
359 c = optind;
360 if (ld_host == NULL && is_host(argv[c]))
361 ld_host = strdup (argv[c++]);
363 if (ld_base == NULL && argv[c])
364 ld_base = strdup (argv[c++]);
366 return validate_arguments ();
367 }
370 int
371 validate_arguments ()
372 {
373 if (ld_host==NULL || strlen(ld_host)==0)
374 usage4 (_("Please specify the host name\n"));
376 if (ld_base==NULL || strlen(ld_base)==0)
377 usage4 (_("Please specify the LDAP base\n"));
379 return OK;
380 }
383 void
384 print_help (void)
385 {
386 char *myport;
387 asprintf (&myport, "%d", DEFAULT_PORT);
389 print_revision (progname, NP_VERSION);
391 printf ("Copyright (c) 1999 Didi Rieder (adrieder@sbox.tu-graz.ac.at)\n");
392 printf (COPYRIGHT, copyright, email);
394 printf ("\n\n");
396 print_usage ();
398 printf (_(UT_HELP_VRSN));
399 printf (_(UT_EXTRA_OPTS));
401 printf (_(UT_HOST_PORT), 'p', myport);
403 printf (_(UT_IPv46));
405 printf (" %s\n", "-a [--attr]");
406 printf (" %s\n", _("ldap attribute to search (default: \"(objectclass=*)\""));
407 printf (" %s\n", "-b [--base]");
408 printf (" %s\n", _("ldap base (eg. ou=my unit, o=my org, c=at"));
409 printf (" %s\n", "-D [--bind]");
410 printf (" %s\n", _("ldap bind DN (if required)"));
411 printf (" %s\n", "-P [--pass]");
412 printf (" %s\n", _("ldap password (if required)"));
413 printf (" %s\n", "-T [--starttls]");
414 printf (" %s\n", _("use starttls mechanism introduced in protocol version 3"));
415 printf (" %s\n", "-S [--ssl]");
416 printf (" %s %i\n", _("use ldaps (ldap v2 ssl method). this also sets the default port to"), LDAPS_PORT);
418 #ifdef HAVE_LDAP_SET_OPTION
419 printf (" %s\n", "-2 [--ver2]");
420 printf (" %s\n", _("use ldap protocol version 2"));
421 printf (" %s\n", "-3 [--ver3]");
422 printf (" %s\n", _("use ldap protocol version 3"));
423 printf (" (%s %d)\n", _("default protocol version:"), DEFAULT_PROTOCOL);
424 #endif
426 printf (_(UT_WARN_CRIT));
428 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
430 printf (_(UT_VERBOSE));
432 printf ("\n");
433 printf ("%s\n", _("Notes:"));
434 printf (" %s\n", _("If this plugin is called via 'check_ldaps', method 'STARTTLS' will be"));
435 printf (_(" implied (using default port %i) unless --port=636 is specified. In that case\n"), DEFAULT_PORT);
436 printf (" %s\n", _("'SSL on connect' will be used no matter how the plugin was called."));
437 printf (" %s\n", _("This detection is deprecated, please use 'check_ldap' with the '--starttls' or '--ssl' flags"));
438 printf (" %s\n", _("to define the behaviour explicitly instead."));
439 #ifdef NP_EXTRA_OPTS
440 printf ("\n");
441 printf (_(UT_EXTRA_OPTS_NOTES));
442 #endif
444 printf (_(UT_SUPPORT));
445 }
447 /* todo
448 * add option -4 and -6 to the long manual
449 *
450 */
452 void
453 print_usage (void)
454 {
455 printf (_("Usage:"));
456 printf (" %s -H <host> -b <base_dn> [-p <port>] [-a <attr>] [-D <binddn>]",progname);
457 printf ("\n [-P <password>] [-w <warn_time>] [-c <crit_time>] [-t timeout]%s\n",
458 #ifdef HAVE_LDAP_SET_OPTION
459 "\n [-2|-3] [-4|-6]"
460 #else
461 ""
462 #endif
463 );
464 }