pkg-monitoring-plugins/plugins/check_ldap.c

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/*****************************************************************************
*
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* Nagios check_ldap plugin
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*
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* License: GPL
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* Copyright (c) 2000-2008 Nagios Plugins Development Team
*
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* Description:
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*
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* This file contains the check_ldap plugin
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*
*
* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
*****************************************************************************/
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/* progname may be check_ldaps */
char *progname = "check_ldap";
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const char *copyright = "2000-2008";
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const char *email = "nagiosplug-devel@lists.sourceforge.net";
#include "common.h"
#include "netutils.h"
#include "utils.h"
#include <lber.h>
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#define LDAP_DEPRECATED 1
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#include <ldap.h>
enum {
UNDEFINED = 0,
#ifdef HAVE_LDAP_SET_OPTION
DEFAULT_PROTOCOL = 2,
#endif
DEFAULT_PORT = 389
};
int process_arguments (int, char **);
int validate_arguments (void);
void print_help (void);
void print_usage (void);
char ld_defattr[] = "(objectclass=*)";
char *ld_attr = ld_defattr;
char *ld_host = NULL;
char *ld_base = NULL;
char *ld_passwd = NULL;
char *ld_binddn = NULL;
int ld_port = DEFAULT_PORT;
#ifdef HAVE_LDAP_SET_OPTION
int ld_protocol = DEFAULT_PROTOCOL;
#endif
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#ifndef LDAP_OPT_SUCCESS
# define LDAP_OPT_SUCCESS LDAP_SUCCESS
#endif
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double warn_time = UNDEFINED;
double crit_time = UNDEFINED;
struct timeval tv;
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int starttls = FALSE;
int ssl_on_connect = FALSE;
int verbose = 0;
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/* for ldap tls */
char *SERVICE = "LDAP";
int
main (int argc, char *argv[])
{
LDAP *ld;
LDAPMessage *result;
/* should be int result = STATE_UNKNOWN; */
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int status = STATE_UNKNOWN;
long microsec;
double elapsed_time;
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/* for ldap tls */
int tls;
int version=3;
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setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
if (strstr(argv[0],"check_ldaps")) {
asprintf (&progname, "check_ldaps");
}
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/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
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if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
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if (strstr(argv[0],"check_ldaps") && ! starttls && ! ssl_on_connect)
starttls = TRUE;
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/* initialize alarm signal handling */
signal (SIGALRM, socket_timeout_alarm_handler);
/* set socket timeout */
alarm (socket_timeout);
/* get the start time */
gettimeofday (&tv, NULL);
/* initialize ldap */
#ifdef HAVE_LDAP_INIT
if (!(ld = ldap_init (ld_host, ld_port))) {
printf ("Could not connect to the server at port %i\n", ld_port);
return STATE_CRITICAL;
}
#else
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if (!(ld = ldap_open (ld_host, ld_port))) {
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if (verbose)
ldap_perror(ld, "ldap_open");
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printf (_("Could not connect to the server at port %i\n"), ld_port);
return STATE_CRITICAL;
}
#endif /* HAVE_LDAP_INIT */
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#ifdef HAVE_LDAP_SET_OPTION
/* set ldap options */
if (ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &ld_protocol) !=
LDAP_OPT_SUCCESS ) {
printf(_("Could not set protocol version %d\n"), ld_protocol);
return STATE_CRITICAL;
}
#endif
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if (ld_port == LDAPS_PORT || ssl_on_connect) {
asprintf (&SERVICE, "LDAPS");
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#if defined(HAVE_LDAP_SET_OPTION) && defined(LDAP_OPT_X_TLS)
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/* ldaps: set option tls */
tls = LDAP_OPT_X_TLS_HARD;
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if (ldap_set_option (ld, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
{
if (verbose)
ldap_perror(ld, "ldaps_option");
printf (_("Could not init TLS at port %i!\n"), ld_port);
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return STATE_CRITICAL;
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}
#else
printf (_("TLS not supported by the libraries!\n"));
return STATE_CRITICAL;
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#endif /* LDAP_OPT_X_TLS */
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} else if (starttls) {
asprintf (&SERVICE, "LDAP-TLS");
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#if defined(HAVE_LDAP_SET_OPTION) && defined(HAVE_LDAP_START_TLS_S)
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/* ldap with startTLS: set option version */
if (ldap_get_option(ld,LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS )
{
if (version < LDAP_VERSION3)
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{
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version = LDAP_VERSION3;
ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &version);
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}
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}
/* call start_tls */
if (ldap_start_tls_s(ld, NULL, NULL) != LDAP_SUCCESS)
{
if (verbose)
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ldap_perror(ld, "ldap_start_tls");
printf (_("Could not init startTLS at port %i!\n"), ld_port);
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return STATE_CRITICAL;
}
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#else
printf (_("startTLS not supported by the library, needs LDAPv3!\n"));
return STATE_CRITICAL;
#endif /* HAVE_LDAP_START_TLS_S */
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}
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/* bind to the ldap server */
if (ldap_bind_s (ld, ld_binddn, ld_passwd, LDAP_AUTH_SIMPLE) !=
LDAP_SUCCESS) {
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if (verbose)
ldap_perror(ld, "ldap_bind");
printf (_("Could not bind to the LDAP server\n"));
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return STATE_CRITICAL;
}
/* do a search of all objectclasses in the base dn */
if (ldap_search_s (ld, ld_base, LDAP_SCOPE_BASE, ld_attr, NULL, 0, &result)
!= LDAP_SUCCESS) {
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if (verbose)
ldap_perror(ld, "ldap_search");
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printf (_("Could not search/find objectclasses in %s\n"), ld_base);
return STATE_CRITICAL;
}
/* unbind from the ldap server */
ldap_unbind (ld);
/* reset the alarm handler */
alarm (0);
/* calcutate the elapsed time and compare to thresholds */
microsec = deltime (tv);
elapsed_time = (double)microsec / 1.0e6;
if (crit_time!=UNDEFINED && elapsed_time>crit_time)
status = STATE_CRITICAL;
else if (warn_time!=UNDEFINED && elapsed_time>warn_time)
status = STATE_WARNING;
else
status = STATE_OK;
/* print out the result */
printf (_("LDAP %s - %.3f seconds response time|%s\n"),
state_text (status),
elapsed_time,
fperfdata ("time", elapsed_time, "s",
(int)warn_time, warn_time,
(int)crit_time, crit_time,
TRUE, 0, FALSE, 0));
return status;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
int option = 0;
/* initialize the long option struct */
static struct option longopts[] = {
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"timeout", required_argument, 0, 't'},
{"host", required_argument, 0, 'H'},
{"base", required_argument, 0, 'b'},
{"attr", required_argument, 0, 'a'},
{"bind", required_argument, 0, 'D'},
{"pass", required_argument, 0, 'P'},
#ifdef HAVE_LDAP_SET_OPTION
{"ver2", no_argument, 0, '2'},
{"ver3", no_argument, 0, '3'},
#endif
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{"starttls", no_argument, 0, 'T'},
{"ssl", no_argument, 0, 'S'},
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{"use-ipv4", no_argument, 0, '4'},
{"use-ipv6", no_argument, 0, '6'},
{"port", required_argument, 0, 'p'},
{"warn", required_argument, 0, 'w'},
{"crit", required_argument, 0, 'c'},
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{"verbose", no_argument, 0, 'v'},
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{0, 0, 0, 0}
};
if (argc < 2)
return ERROR;
for (c = 1; c < argc; c++) {
if (strcmp ("-to", argv[c]) == 0)
strcpy (argv[c], "-t");
}
while (1) {
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c = getopt_long (argc, argv, "hvV234TS6t:c:w:H:b:p:a:D:P:", longopts, &option);
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if (c == -1 || c == EOF)
break;
switch (c) {
case 'h': /* help */
print_help ();
exit (STATE_OK);
case 'V': /* version */
print_revision (progname, NP_VERSION);
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exit (STATE_OK);
case 't': /* timeout period */
if (!is_intnonneg (optarg))
usage2 (_("Timeout interval must be a positive integer"), optarg);
else
socket_timeout = atoi (optarg);
break;
case 'H':
ld_host = optarg;
break;
case 'b':
ld_base = optarg;
break;
case 'p':
ld_port = atoi (optarg);
break;
case 'a':
ld_attr = optarg;
break;
case 'D':
ld_binddn = optarg;
break;
case 'P':
ld_passwd = optarg;
break;
case 'w':
warn_time = strtod (optarg, NULL);
break;
case 'c':
crit_time = strtod (optarg, NULL);
break;
#ifdef HAVE_LDAP_SET_OPTION
case '2':
ld_protocol = 2;
break;
case '3':
ld_protocol = 3;
break;
#endif
case '4':
address_family = AF_INET;
break;
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case 'v':
verbose++;
break;
case 'T':
if (! ssl_on_connect)
starttls = TRUE;
else
usage_va(_("%s cannot be combined with %s"), "-T/--starttls", "-S/--ssl");
break;
case 'S':
if (! starttls) {
ssl_on_connect = TRUE;
ld_port = LDAPS_PORT;
} else
usage_va(_("%s cannot be combined with %s"), "-S/--ssl", "-T/--starttls");
break;
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case '6':
#ifdef USE_IPV6
address_family = AF_INET6;
#else
usage (_("IPv6 support not available\n"));
#endif
break;
default:
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usage5 ();
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}
}
c = optind;
if (ld_host == NULL && is_host(argv[c]))
ld_host = strdup (argv[c++]);
if (ld_base == NULL && argv[c])
ld_base = strdup (argv[c++]);
return validate_arguments ();
}
int
validate_arguments ()
{
if (ld_host==NULL || strlen(ld_host)==0)
usage4 (_("Please specify the host name\n"));
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if (ld_base==NULL)
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usage4 (_("Please specify the LDAP base\n"));
return OK;
}
void
print_help (void)
{
char *myport;
asprintf (&myport, "%d", DEFAULT_PORT);
print_revision (progname, NP_VERSION);
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printf ("Copyright (c) 1999 Didi Rieder (adrieder@sbox.tu-graz.ac.at)\n");
printf (COPYRIGHT, copyright, email);
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printf ("\n\n");
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print_usage ();
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printf (UT_HELP_VRSN);
printf (UT_EXTRA_OPTS);
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printf (UT_HOST_PORT, 'p', myport);
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printf (UT_IPv46);
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printf (" %s\n", "-a [--attr]");
printf (" %s\n", _("ldap attribute to search (default: \"(objectclass=*)\""));
printf (" %s\n", "-b [--base]");
printf (" %s\n", _("ldap base (eg. ou=my unit, o=my org, c=at"));
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printf (" %s\n", "-D [--bind]");
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printf (" %s\n", _("ldap bind DN (if required)"));
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printf (" %s\n", "-P [--pass]");
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printf (" %s\n", _("ldap password (if required)"));
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printf (" %s\n", "-T [--starttls]");
printf (" %s\n", _("use starttls mechanism introduced in protocol version 3"));
printf (" %s\n", "-S [--ssl]");
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printf (" %s %i\n", _("use ldaps (ldap v2 ssl method). this also sets the default port to"), LDAPS_PORT);
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#ifdef HAVE_LDAP_SET_OPTION
printf (" %s\n", "-2 [--ver2]");
printf (" %s\n", _("use ldap protocol version 2"));
printf (" %s\n", "-3 [--ver3]");
printf (" %s\n", _("use ldap protocol version 3"));
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printf (" (%s %d)\n", _("default protocol version:"), DEFAULT_PROTOCOL);
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#endif
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printf (UT_WARN_CRIT);
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printf (UT_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
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printf (UT_VERBOSE);
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printf ("\n");
printf ("%s\n", _("Notes:"));
printf (" %s\n", _("If this plugin is called via 'check_ldaps', method 'STARTTLS' will be"));
printf (_(" implied (using default port %i) unless --port=636 is specified. In that case\n"), DEFAULT_PORT);
printf (" %s\n", _("'SSL on connect' will be used no matter how the plugin was called."));
printf (" %s\n", _("This detection is deprecated, please use 'check_ldap' with the '--starttls' or '--ssl' flags"));
printf (" %s\n", _("to define the behaviour explicitly instead."));
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printf (UT_SUPPORT);
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}
/* todo
* add option -4 and -6 to the long manual
*
*/
void
print_usage (void)
{
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printf ("%s\n", _("Usage:"));
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printf (" %s -H <host> -b <base_dn> [-p <port>] [-a <attr>] [-D <binddn>]",progname);
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printf ("\n [-P <password>] [-w <warn_time>] [-c <crit_time>] [-t timeout]%s\n",
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#ifdef HAVE_LDAP_SET_OPTION
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"\n [-2|-3] [-4|-6]"
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#else
""
#endif
);
}