1/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <netdb.h>
19#include <string.h>
20#include <resolv/res_hconf.h>
21
22#define LOOKUP_TYPE struct hostent
23#define FUNCTION_NAME gethostbyaddr
24#define DATABASE_NAME hosts
25#define ADD_PARAMS const void *addr, socklen_t len, int type
26#define ADD_VARIABLES addr, len, type
27#define NEED_H_ERRNO 1
28#define NEED__RES 1
29/* If the addr parameter is the IPv6 unspecified address no query must
30 be performed. */
31#define PREPROCESS \
32 if (len == sizeof (struct in6_addr) \
33 && __builtin_expect (memcmp (&__in6addr_any, addr, \
34 sizeof (struct in6_addr)), 1) == 0) \
35 { \
36 *h_errnop = HOST_NOT_FOUND; \
37 *result = NULL; \
38 return ENOENT; \
39 }
40#define POSTPROCESS \
41 if (status == NSS_STATUS_SUCCESS) \
42 { \
43 _res_hconf_reorder_addrs (resbuf); \
44 _res_hconf_trim_domains (resbuf); \
45 }
46
47/* Special name for the lookup function. */
48#define DB_LOOKUP_FCT __nss_hosts_lookup2
49
50#include "../nss/getXXbyYY_r.c"
51