/******************************************************************************
*
* Nagios check_dns plugin
*
* License: GPL
* Copyright (c) 1999-2006 nagios-plugins team
*
* Last Modified: $Date: 2007-01-28 21:46:41 +0000 (Sun, 28 Jan 2007) $
*
* Description:
*
* This file contains the check_dns plugin
*
*  LIMITATION: nslookup on Solaris 7 can return output over 2 lines, which will not 
*  be picked up by this plugin
*
* License Information:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Id: check_dns.c 1590 2007-01-28 21:46:41Z hweiss $
*
******************************************************************************/

const char *progname = "check_dns";
const char *revision = "$Revision: 1590 $";
const char *copyright = "2000-2006";
const char *email = "nagiosplug-devel@lists.sourceforge.net";

#include "common.h"
#include "utils.h"
#include "utils_base.h"
#include "netutils.h"
#include "runcmd.h"

int process_arguments (int, char **);
int validate_arguments (void);
int error_scan (char *);
void print_help (void);
void print_usage (void);

#define ADDRESS_LENGTH 256
char query_address[ADDRESS_LENGTH] = "";
char dns_server[ADDRESS_LENGTH] = "";
char ptr_server[ADDRESS_LENGTH] = "";
int verbose = FALSE;
char expected_address[ADDRESS_LENGTH] = "";
int match_expected_address = FALSE;
int expect_authority = FALSE;
thresholds *time_thresholds = NULL;

int
main (int argc, char **argv)
{
  char *command_line = NULL;
  char input_buffer[MAX_INPUT_BUFFER];
  char *address = NULL;
  char *msg = NULL;
  char *temp_buffer = NULL;
  int non_authoritative = FALSE;
  int result = STATE_UNKNOWN;
  double elapsed_time;
  long microsec;
  struct timeval tv;
  int multi_address;
  int parse_address = FALSE; /* This flag scans for Address: but only after Name: */
  output chld_out, chld_err;
  size_t i;

  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  /* Set signal handling and alarm */
  if (signal (SIGALRM, popen_timeout_alarm_handler) == SIG_ERR) {
    usage_va(_("Cannot catch SIGALRM"));
  }

  if (process_arguments (argc, argv) == ERROR) {
    usage_va(_("Could not parse arguments"));
  }

  /* get the command to run */
  asprintf (&command_line, "%s %s %s", NSLOOKUP_COMMAND, query_address, dns_server);

  alarm (timeout_interval);
  gettimeofday (&tv, NULL);