/* Copyright (C) 1996-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.

   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 <netdb.h>

#include <string.h>

#include <resolv/res_hconf.h>

#define LOOKUP_TYPE	struct hostent

#define FUNCTION_NAME	gethostbyaddr

#define DATABASE_NAME	hosts

#define ADD_PARAMS	const void *addr, socklen_t len, int type

#define ADD_VARIABLES	addr, len, type

#define NEED_H_ERRNO	1

#define NEED__RES	1

/* If the addr parameter is the IPv6 unspecified address no query must

   be performed.  */

#define PREPROCESS \

  if (len == sizeof (struct in6_addr)					      \

      && __builtin_expect (memcmp (&__in6addr_any, addr,		      \

				   sizeof (struct in6_addr)), 1) == 0)	      \

    {									      \

      *h_errnop = HOST_NOT_FOUND;					      \

      *result = NULL;							      \

      return ENOENT;							      \

    }

#define POSTPROCESS \

  if (status == NSS_STATUS_SUCCESS)					      \

    {									      \

      _res_hconf_reorder_addrs (resbuf);				      \

      _res_hconf_trim_domains (resbuf);					      \

    }

/* Special name for the lookup function.  */

#define DB_LOOKUP_FCT __nss_hosts_lookup2

#include "../nss/getXXbyYY_r.c"