/* Check that a DNS packet buffer has the expected contents.

   Copyright (C) 2016-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <support/check_nss.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <support/check.h>

#include <support/format_nss.h>

#include <support/run_diff.h>

void

check_dns_packet (const char *query_description,

                  const unsigned char *buffer, size_t length,

                  const char *expected)

{

  char *formatted = support_format_dns_packet (buffer, length);

  if (strcmp (formatted, expected) != 0)

    {

      support_record_failure ();

      printf ("error: packet comparison failure\n");

      if (query_description != NULL)

        printf ("query: %s\n", query_description);

      support_run_diff ("expected", expected, "actual", formatted);

    }

  free (formatted);

}