plugins/check_ldap.c

   1 /******************************************************************************
   2 *
   3 * Nagios check_ldap plugin
   4 *
   5 * License: GPL
   6 * Copyright (c) 2000-2006 nagios-plugins team
   7 *
   8 * Last Modified: $Date$
   9 *
  10 * Description:
  11 *
  12 * This file contains the check_ldap plugin
  13 *
  14 * License Information:
  15 *
  16 * This program is free software; you can redistribute it and/or modify
  17 * it under the terms of the GNU General Public License as published by
  18 * the Free Software Foundation; either version 2 of the License, or
  19 * (at your option) any later version.
  20 *
  21 * This program is distributed in the hope that it will be useful,
  22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 * GNU General Public License for more details.
  25 *
  26 * You should have received a copy of the GNU General Public License
  27 * along with this program; if not, write to the Free Software
  28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29
  30  $Id$
  31
  32 ******************************************************************************/
  33
  34 /* progname may be check_ldaps */
  35 char *progname = "check_ldap";
  36 const char *revision = "$Revision$";
  37 const char *copyright = "2000-2006";
  38 const char *email = "nagiosplug-devel@lists.sourceforge.net";
  39
  40 #include "common.h"
  41 #include "netutils.h"
  42 #include "utils.h"
  43
  44 #include <lber.h>
  45 #include <ldap.h>
  46
  47 enum {
  48         UNDEFINED = 0,
  49 #ifdef HAVE_LDAP_SET_OPTION
  50         DEFAULT_PROTOCOL = 2,
  51 #endif
  52         DEFAULT_PORT = 389
  53 };
  54
  55 int process_arguments (int, char **);
  56 int validate_arguments (void);
  57 void print_help (void);
  58 void print_usage (void);
  59
  60 char ld_defattr[] = "(objectclass=*)";
  61 char *ld_attr = ld_defattr;
  62 char *ld_host = NULL;
  63 char *ld_base = NULL;
  64 char *ld_passwd = NULL;
  65 char *ld_binddn = NULL;
  66 int ld_port = DEFAULT_PORT;
  67 #ifdef HAVE_LDAP_SET_OPTION
  68 int ld_protocol = DEFAULT_PROTOCOL;
  69 #endif
  70 #ifndef LDAP_OPT_SUCCESS
  71 # define LDAP_OPT_SUCCESS LDAP_SUCCESS
  72 #endif
  73 double warn_time = UNDEFINED;
  74 double crit_time = UNDEFINED;
  75 struct timeval tv;
  76 int starttls = FALSE;
  77 int ssl_on_connect = FALSE;
  78 int verbose = 0;
  79
  80 /* for ldap tls */
  81
  82 char *SERVICE = "LDAP";
  83
  84 int
  85 main (int argc, char *argv[])
  86 {
  87
  88         LDAP *ld;
  89         LDAPMessage *result;
  90
  91         /* should be    int result = STATE_UNKNOWN; */
  92
  93         int status = STATE_UNKNOWN;
  94         long microsec;
  95         double elapsed_time;
  96
  97         /* for ldap tls */
  98
  99         int tls;
 100         int version=3;
 101
 102         setlocale (LC_ALL, "");
 103         bindtextdomain (PACKAGE, LOCALEDIR);
 104         textdomain (PACKAGE);
 105
 106         if (strstr(argv[0],"check_ldaps")) {
 107                 asprintf (&progname, "check_ldaps");
 108         }
 109
 110         if (process_arguments (argc, argv) == ERROR)
 111                 usage4 (_("Could not parse arguments"));
 112
 113         if (strstr(argv[0],"check_ldaps") && ! starttls && ! ssl_on_connect)
 114                 starttls = TRUE;
 115
 116         /* initialize alarm signal handling */
 117         signal (SIGALRM, socket_timeout_alarm_handler);
 118
 119         /* set socket timeout */
 120         alarm (socket_timeout);
 121
 122         /* get the start time */
 123         gettimeofday (&tv, NULL);
 124
 125         /* initialize ldap */
 126 #ifdef HAVE_LDAP_INIT
 127         if (!(ld = ldap_init (ld_host, ld_port))) {
 128                 printf ("Could not connect to the server at port %i\n", ld_port);
 129                 return STATE_CRITICAL;
 130         }
 131 #else
 132         if (!(ld = ldap_open (ld_host, ld_port))) {
 133                 if (verbose)
 134                         ldap_perror(ld, "ldap_open");
 135                 printf (_("Could not connect to the server at port %i\n"), ld_port);
 136                 return STATE_CRITICAL;
 137         }
 138 #endif /* HAVE_LDAP_INIT */
 139
 140 #ifdef HAVE_LDAP_SET_OPTION
 141         /* set ldap options */
 142         if (ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &ld_protocol) !=
 143                         LDAP_OPT_SUCCESS ) {
 144                 printf(_("Could not set protocol version %d\n"), ld_protocol);
 145                 return STATE_CRITICAL;
 146         }
 147 #endif
 148
 149         if (ld_port == LDAPS_PORT || ssl_on_connect) {
 150                 asprintf (&SERVICE, "LDAPS");
 151 #if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS)
 152                 /* ldaps: set option tls */
 153                 tls = LDAP_OPT_X_TLS_HARD;
 154
 155                 if (ldap_set_option (ld, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 156                 {
 157                         if (verbose)
 158                                 ldap_perror(ld, "ldaps_option");
 159                         printf (_("Could not init TLS at port %i!\n"), ld_port);
 160                         return STATE_CRITICAL;
 161                 }
 162 #else
 163                 printf (_("TLS not supported by the libraries!\n"));
 164                 return STATE_CRITICAL;
 165 #endif /* LDAP_OPT_X_TLS */
 166         } else if (starttls) {
 167                 asprintf (&SERVICE, "LDAP-TLS");
 168 #if defined(HAVE_LDAP_SET_OPTION) && defined(HAVE_LDAP_START_TLS_S)
 169                 /* ldap with startTLS: set option version */
 170                 if (ldap_get_option(ld,LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS )
 171                 {
 172                         if (version < LDAP_VERSION3)
 173                         {
 174                                 version = LDAP_VERSION3;
 175                                 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &version);
 176                         }
 177                 }
 178                 /* call start_tls */
 179                 if (ldap_start_tls_s(ld, NULL, NULL) != LDAP_SUCCESS)
 180                 {
 181                         if (verbose)
 182                                 ldap_perror(ld, "ldap_start_tls");
 183                         printf (_("Could not init startTLS at port %i!\n"), ld_port);
 184                         return STATE_CRITICAL;
 185                 }
 186 #else
 187                 printf (_("startTLS not supported by the library, needs LDAPv3!\n"));
 188                 return STATE_CRITICAL;
 189 #endif /* HAVE_LDAP_START_TLS_S */
 190         }
 191
 192         /* bind to the ldap server */
 193         if (ldap_bind_s (ld, ld_binddn, ld_passwd, LDAP_AUTH_SIMPLE) !=
 194                         LDAP_SUCCESS) {
 195                 if (verbose)
 196                         ldap_perror(ld, "ldap_bind");
 197                 printf (_("Could not bind to the ldap-server\n"));
 198                 return STATE_CRITICAL;
 199         }
 200
 201         /* do a search of all objectclasses in the base dn */
 202         if (ldap_search_s (ld, ld_base, LDAP_SCOPE_BASE, ld_attr, NULL, 0, &result)
 203                         != LDAP_SUCCESS) {
 204                 if (verbose)
 205                         ldap_perror(ld, "ldap_search");
 206                 printf (_("Could not search/find objectclasses in %s\n"), ld_base);
 207                 return STATE_CRITICAL;
 208         }
 209
 210         /* unbind from the ldap server */
 211         ldap_unbind (ld);
 212
 213         /* reset the alarm handler */
 214         alarm (0);
 215
 216         /* calcutate the elapsed time and compare to thresholds */
 217
 218         microsec = deltime (tv);
 219         elapsed_time = (double)microsec / 1.0e6;
 220
 221         if (crit_time!=UNDEFINED && elapsed_time>crit_time)
 222                 status = STATE_CRITICAL;
 223         else if (warn_time!=UNDEFINED && elapsed_time>warn_time)
 224                 status = STATE_WARNING;
 225         else
 226                 status = STATE_OK;
 227
 228         /* print out the result */
 229         printf (_("LDAP %s - %.3f seconds response time|%s\n"),
 230                 state_text (status),
 231                 elapsed_time,
 232                 fperfdata ("time", elapsed_time, "s",
 233                           (int)warn_time, warn_time,
 234                           (int)crit_time, crit_time,
 235                           TRUE, 0, FALSE, 0));
 236
 237         return status;
 238 }
 239
 240 /* process command-line arguments */
 241 int
 242 process_arguments (int argc, char **argv)
 243 {
 244         int c;
 245
 246         int option = 0;
 247         /* initialize the long option struct */
 248         static struct option longopts[] = {
 249                 {"help", no_argument, 0, 'h'},
 250                 {"version", no_argument, 0, 'V'},
 251                 {"timeout", required_argument, 0, 't'},
 252                 {"host", required_argument, 0, 'H'},
 253                 {"base", required_argument, 0, 'b'},
 254                 {"attr", required_argument, 0, 'a'},
 255                 {"bind", required_argument, 0, 'D'},
 256                 {"pass", required_argument, 0, 'P'},
 257 #ifdef HAVE_LDAP_SET_OPTION
 258                 {"ver2", no_argument, 0, '2'},
 259                 {"ver3", no_argument, 0, '3'},
 260 #endif
 261                 {"starttls", no_argument, 0, 'T'},
 262                 {"ssl", no_argument, 0, 'S'},
 263                 {"use-ipv4", no_argument, 0, '4'},
 264                 {"use-ipv6", no_argument, 0, '6'},
 265                 {"port", required_argument, 0, 'p'},
 266                 {"warn", required_argument, 0, 'w'},
 267                 {"crit", required_argument, 0, 'c'},
 268                 {"verbose", no_argument, 0, 'v'},
 269                 {0, 0, 0, 0}
 270         };
 271
 272         if (argc < 2)
 273                 return ERROR;
 274
 275         for (c = 1; c < argc; c++) {
 276                 if (strcmp ("-to", argv[c]) == 0)
 277                         strcpy (argv[c], "-t");
 278         }
 279
 280         while (1) {
 281                 c = getopt_long (argc, argv, "hvV234TS6t:c:w:H:b:p:a:D:P:", longopts, &option);
 282
 283                 if (c == -1 || c == EOF)
 284                         break;
 285
 286                 switch (c) {
 287                 case 'h':                                                                       /* help */
 288                         print_help ();
 289                         exit (STATE_OK);
 290                 case 'V':                                                                       /* version */
 291                         print_revision (progname, revision);
 292                         exit (STATE_OK);
 293                 case 't':                                                                       /* timeout period */
 294                         if (!is_intnonneg (optarg))
 295                                 usage2 (_("Timeout interval must be a positive integer"), optarg);
 296                         else
 297                                 socket_timeout = atoi (optarg);
 298                         break;
 299                 case 'H':
 300                         ld_host = optarg;
 301                         break;
 302                 case 'b':
 303                         ld_base = optarg;
 304                         break;
 305                 case 'p':
 306                         ld_port = atoi (optarg);
 307                         break;
 308                 case 'a':
 309                         ld_attr = optarg;
 310                         break;
 311                 case 'D':
 312                         ld_binddn = optarg;
 313                         break;
 314                 case 'P':
 315                         ld_passwd = optarg;
 316                         break;
 317                 case 'w':
 318                         warn_time = strtod (optarg, NULL);
 319                         break;
 320                 case 'c':
 321                         crit_time = strtod (optarg, NULL);
 322                         break;
 323 #ifdef HAVE_LDAP_SET_OPTION
 324                 case '2':
 325                         ld_protocol = 2;
 326                         break;
 327                 case '3':
 328                         ld_protocol = 3;
 329                         break;
 330 #endif
 331                 case '4':
 332                         address_family = AF_INET;
 333                         break;
 334                 case 'v':
 335                         verbose++;
 336                         break;
 337                 case 'T':
 338                         if (! ssl_on_connect)
 339                                 starttls = TRUE;
 340                         else
 341                                 usage_va(_("%s cannot be combined with %s"), "-T/--starttls", "-S/--ssl");
 342                         break;
 343                 case 'S':
 344                         if (! starttls) {
 345                                 ssl_on_connect = TRUE;
 346                                 ld_port = LDAPS_PORT;
 347                         } else
 348                                 usage_va(_("%s cannot be combined with %s"), "-S/--ssl", "-T/--starttls");
 349                         break;
 350                 case '6':
 351 #ifdef USE_IPV6
 352                         address_family = AF_INET6;
 353 #else
 354                         usage (_("IPv6 support not available\n"));
 355 #endif
 356                         break;
 357                 default:
 358                         usage5 ();
 359                 }
 360         }
 361
 362         c = optind;
 363         if (ld_host == NULL && is_host(argv[c]))
 364                 ld_host = strdup (argv[c++]);
 365
 366         if (ld_base == NULL && argv[c])
 367                 ld_base = strdup (argv[c++]);
 368
 369         return validate_arguments ();
 370 }
 371
 372
 373 int
 374 validate_arguments ()
 375 {
 376         if (ld_host==NULL || strlen(ld_host)==0)
 377                 usage4 (_("Please specify the host name\n"));
 378
 379         if (ld_base==NULL || strlen(ld_base)==0)
 380                 usage4 (_("Please specify the LDAP base\n"));
 381
 382         return OK;
 383 }
 384
 385
 386 void
 387 print_help (void)
 388 {
 389         char *myport;
 390         asprintf (&myport, "%d", DEFAULT_PORT);
 391
 392         print_revision (progname, revision);
 393
 394         printf ("Copyright (c) 1999 Didi Rieder (adrieder@sbox.tu-graz.ac.at)\n");
 395         printf (COPYRIGHT, copyright, email);
 396
 397   printf ("\n\n");
 398
 399         print_usage ();
 400
 401         printf (_(UT_HELP_VRSN));
 402
 403         printf (_(UT_HOST_PORT), 'p', myport);
 404
 405         printf (_(UT_IPv46));
 406
 407         printf (" %s\n", "-a [--attr]");
 408   printf ("    %s\n", _("ldap attribute to search (default: \"(objectclass=*)\""));
 409   printf (" %s\n", "-b [--base]");
 410   printf ("    %s\n", _("ldap base (eg. ou=my unit, o=my org, c=at"));
 411   printf (" %s\n", "-D [--bind]");
 412   printf ("    %s\n", _("ldap bind DN (if required)"));
 413   printf (" %s\n", "-P [--pass]");
 414   printf ("    %s\n", _("ldap password (if required)"));
 415   printf (" %s\n", "-T [--starttls]");
 416   printf ("    %s\n", _("use starttls mechanism introduced in protocol version 3"));
 417   printf (" %s\n", "-S [--ssl]");
 418   printf ("    %s %i\n", _("use ldaps (ldap v2 ssl method). this also sets the default port to"), LDAPS_PORT);
 419
 420 #ifdef HAVE_LDAP_SET_OPTION
 421         printf (" %s\n", "-2 [--ver2]");
 422   printf ("    %s\n", _("use ldap protocol version 2"));
 423   printf (" %s\n", "-3 [--ver3]");
 424   printf ("    %s\n", _("use ldap protocol version 3"));
 425   printf ("    (%s %d)\n", _("default protocol version:"), DEFAULT_PROTOCOL);
 426 #endif
 427
 428         printf (_(UT_WARN_CRIT));
 429
 430         printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
 431
 432         printf (_(UT_VERBOSE));
 433
 434         printf ("\n%s\n", _("Note:"));
 435         printf ("%s\n", _("If this plugin is called via 'check_ldaps', method 'STARTTLS' will be"));
 436         printf (_("implied (using default port %i) unless --port=636 is specified. In that case %s"), DEFAULT_PORT, "\n");
 437         printf ("%s\n", _("'SSL on connect' will be used no matter how the plugin was called."));
 438         printf ("%s\n", _("This detection is deprecated, please use 'check_ldap' with the '--starttls' or '--ssl' flags"));
 439         printf ("%s\n", _("to define the behaviour explicitly instead."));
 440
 441         printf (_(UT_SUPPORT));
 442 }
 443
 444 /* todo
 445 * add option -4 and -6 to the long manual
 446 *
 447 */
 448
 449 void
 450 print_usage (void)
 451 {
 452   printf (_("Usage:"));
 453         printf (" %s -H <host> -b <base_dn> [-p <port>] [-a <attr>] [-D <binddn>]",progname);
 454   printf ("\n       [-P <password>] [-w <warn_time>] [-c <crit_time>] [-t timeout]%s\n",
 455 #ifdef HAVE_LDAP_SET_OPTION
 456                         "\n       [-2|-3] [-4|-6]"
 457 #else
 458                         ""
 459 #endif
 460                         );
 461 }