Imported Upstream version 1.4.12
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1d1585cd09
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291 changed files with 27277 additions and 11364 deletions
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@ -1,43 +1,40 @@
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/******************************************************************************
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*
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/*****************************************************************************
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*
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* Nagios check_dns plugin
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*
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*
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* License: GPL
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* Copyright (c) 1999-2006 nagios-plugins team
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*
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* Last Modified: $Date: 2007-01-28 21:46:41 +0000 (Sun, 28 Jan 2007) $
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*
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* Copyright (c) 2000-2008 Nagios Plugins Development Team
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*
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* Last Modified: $Date: 2008-05-13 10:14:45 +0100 (Tue, 13 May 2008) $
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*
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* Description:
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*
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*
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* This file contains the check_dns plugin
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*
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* LIMITATION: nslookup on Solaris 7 can return output over 2 lines, which will not
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* be picked up by this plugin
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*
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* License Information:
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*
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* This program is free software; you can redistribute it and/or modify
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*
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* LIMITATION: nslookup on Solaris 7 can return output over 2 lines, which
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* will not be picked up by this plugin
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*
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*
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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 2 of the License, or
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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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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* $Id: check_dns.c 1590 2007-01-28 21:46:41Z hweiss $
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*
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******************************************************************************/
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* $Id: check_dns.c 1992 2008-05-13 09:14:45Z dermoth $
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*
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*****************************************************************************/
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const char *progname = "check_dns";
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const char *revision = "$Revision: 1590 $";
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const char *copyright = "2000-2006";
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const char *revision = "$Revision: 1992 $";
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const char *copyright = "2000-2008";
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const char *email = "nagiosplug-devel@lists.sourceforge.net";
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#include "common.h"
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@ -57,17 +54,30 @@ char query_address[ADDRESS_LENGTH] = "";
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char dns_server[ADDRESS_LENGTH] = "";
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char ptr_server[ADDRESS_LENGTH] = "";
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int verbose = FALSE;
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char expected_address[ADDRESS_LENGTH] = "";
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int match_expected_address = FALSE;
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char **expected_address = NULL;
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int expected_address_cnt = 0;
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int expect_authority = FALSE;
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thresholds *time_thresholds = NULL;
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static int
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qstrcmp(const void *p1, const void *p2)
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{
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/* The actual arguments to this function are "pointers to
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pointers to char", but strcmp() arguments are "pointers
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to char", hence the following cast plus dereference */
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return strcmp(* (char * const *) p1, * (char * const *) p2);
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}
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int
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main (int argc, char **argv)
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{
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char *command_line = NULL;
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char input_buffer[MAX_INPUT_BUFFER];
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char *address = NULL;
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char *address = NULL; /* comma seperated str with addrs/ptrs (sorted) */
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char **addresses = NULL;
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int n_addresses = 0;
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char *msg = NULL;
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char *temp_buffer = NULL;
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int non_authoritative = FALSE;
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@ -89,6 +99,9 @@ main (int argc, char **argv)
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usage_va(_("Cannot catch SIGALRM"));
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}
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/* Parse extra opts if any */
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argv=np_extra_opts (&argc, argv, progname);
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if (process_arguments (argc, argv) == ERROR) {
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usage_va(_("Could not parse arguments"));
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}
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@ -110,12 +123,17 @@ main (int argc, char **argv)
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/* scan stdout */
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for(i = 0; i < chld_out.lines; i++) {
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if (addresses == NULL)
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addresses = malloc(sizeof(*addresses)*10);
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else if (!(n_addresses % 10))
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addresses = realloc(addresses,sizeof(*addresses) * (n_addresses + 10));
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if (verbose)
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puts(chld_out.line[i]);
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if (strstr (chld_out.line[i], ".in-addr.arpa")) {
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if ((temp_buffer = strstr (chld_out.line[i], "name = ")))
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address = strdup (temp_buffer + 7);
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addresses[n_addresses++] = strdup (temp_buffer + 7);
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else {
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msg = (char *)_("Warning plugin error");
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result = STATE_WARNING;
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@ -133,7 +151,7 @@ main (int argc, char **argv)
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/* Strip leading spaces */
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for (; *temp_buffer != '\0' && *temp_buffer == ' '; temp_buffer++)
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/* NOOP */;
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strip(temp_buffer);
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if (temp_buffer==NULL || strlen(temp_buffer)==0) {
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die (STATE_CRITICAL,
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@ -141,16 +159,13 @@ main (int argc, char **argv)
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NSLOOKUP_COMMAND);
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}
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if (address == NULL)
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address = strdup (temp_buffer);
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else
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asprintf(&address, "%s,%s", address, temp_buffer);
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addresses[n_addresses++] = strdup(temp_buffer);
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}
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else if (strstr (chld_out.line[i], _("Non-authoritative answer:"))) {
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non_authoritative = TRUE;
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}
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result = error_scan (chld_out.line[i]);
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if (result != STATE_OK) {
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msg = strchr (chld_out.line[i], ':');
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@ -171,17 +186,39 @@ main (int argc, char **argv)
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}
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}
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/* If we got here, we should have an address string,
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* and we can segfault if we do not */
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if (address==NULL || strlen(address)==0)
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if (addresses) {
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int i,slen;
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char *adrp;
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qsort(addresses, n_addresses, sizeof(*addresses), qstrcmp);
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for(i=0, slen=1; i < n_addresses; i++) {
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slen += strlen(addresses[i])+1;
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}
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adrp = address = malloc(slen);
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for(i=0; i < n_addresses; i++) {
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if (i) *adrp++ = ',';
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strcpy(adrp, addresses[i]);
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adrp += strlen(addresses[i]);
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}
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*adrp = 0;
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} else
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die (STATE_CRITICAL,
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_("DNS CRITICAL - '%s' msg parsing exited with no address\n"),
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NSLOOKUP_COMMAND);
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/* compare to expected address */
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if (result == STATE_OK && match_expected_address && strcmp(address, expected_address)) {
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if (result == STATE_OK && expected_address_cnt > 0) {
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result = STATE_CRITICAL;
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asprintf(&msg, _("expected '%s' but got '%s'"), expected_address, address);
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temp_buffer = "";
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for (i=0; i<expected_address_cnt; i++) {
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/* check if we get a match and prepare an error string */
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if (strcmp(address, expected_address[i]) == 0) result = STATE_OK;
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asprintf(&temp_buffer, "%s%s; ", temp_buffer, expected_address[i]);
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}
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if (result == STATE_CRITICAL) {
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/* Strip off last semicolon... */
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temp_buffer[strlen(temp_buffer)-2] = '\0';
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asprintf(&msg, _("expected '%s' but got '%s'"), temp_buffer, address);
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}
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}
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/* check if authoritative */
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@ -357,8 +394,9 @@ process_arguments (int argc, char **argv)
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case 'a': /* expected address */
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if (strlen (optarg) >= ADDRESS_LENGTH)
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die (STATE_UNKNOWN, _("Input buffer overflow\n"));
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strcpy (expected_address, optarg);
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match_expected_address = TRUE;
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expected_address = (char **)realloc(expected_address, (expected_address_cnt+1) * sizeof(char**));
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expected_address[expected_address_cnt] = strdup(optarg);
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expected_address_cnt++;
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break;
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case 'A': /* expect authority */
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expect_authority = TRUE;
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@ -416,19 +454,23 @@ print_help (void)
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printf ("%s\n", _("This plugin uses the nslookup program to obtain the IP address for the given host/domain query."));
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printf ("%s\n", _("An optional DNS server to use may be specified."));
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printf ("%s\n", _("If no DNS server is specified, the default server(s) specified in /etc/resolv.conf will be used."));
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printf ("\n\n");
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print_usage ();
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printf (_(UT_HELP_VRSN));
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printf (_(UT_EXTRA_OPTS));
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printf (" -H, --hostname=HOST\n");
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printf (" %s\n", _("The name or address you want to query"));
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printf (" -s, --server=HOST\n");
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printf (" %s\n", _("Optional DNS server you want to use for the lookup"));
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printf (" -a, --expected-address=IP-ADDRESS|HOST\n");
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printf (" %s\n", _("Optional IP-ADDRESS you expect the DNS server to return. HOST must end with ."));
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printf (" %s\n", _("Optional IP-ADDRESS you expect the DNS server to return. HOST must end with"));
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printf (" %s\n", _("a dot (.). This option can be repeated multiple times (Returns OK if any"));
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printf (" %s\n", _("value match). If multiple addresses are returned at once, you have to match"));
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printf (" %s\n", _("the whole string of addresses separated with commas (sorted alphabetically)."));
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printf (" -A, --expect-authority\n");
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printf (" %s\n", _("Optionally expect the DNS server to be authoritative for the lookup"));
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printf (" -w, --warning=seconds\n");
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@ -437,6 +479,13 @@ print_help (void)
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printf (" %s\n", _("Return critical if elapsed time exceeds value. Default off"));
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printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
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#ifdef NP_EXTRA_OPTS
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printf ("\n");
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printf ("%s\n", _("Notes:"));
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printf (_(UT_EXTRA_OPTS_NOTES));
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#endif
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printf (_(UT_SUPPORT));
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}
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