1/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <netdb.h>
20#include <string.h>
21#include <resolv/res_hconf.h>
22
23#define LOOKUP_TYPE struct hostent
24#define FUNCTION_NAME gethostbyaddr
25#define DATABASE_NAME hosts
26#define ADD_PARAMS const void *addr, socklen_t len, int type
27#define ADD_VARIABLES addr, len, type
28#define NEED_H_ERRNO 1
29#define NEED__RES 1
30/* If the addr parameter is the IPv6 unspecified address no query must
31 be performed. */
32#define PREPROCESS \
33 if (len == sizeof (struct in6_addr) \
34 && __builtin_expect (memcmp (&__in6addr_any, addr, \
35 sizeof (struct in6_addr)), 1) == 0) \
36 { \
37 *h_errnop = HOST_NOT_FOUND; \
38 *result = NULL; \
39 return ENOENT; \
40 }
41#define POSTPROCESS \
42 if (status == NSS_STATUS_SUCCESS) \
43 { \
44 _res_hconf_reorder_addrs (resbuf); \
45 _res_hconf_trim_domains (resbuf); \
46 }
47
48/* Special name for the lookup function. */
49#define DB_LOOKUP_FCT __nss_hosts_lookup2
50
51#include "../nss/getXXbyYY_r.c"
52