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[platform/upstream/glibc.git] / inet / gethstbyad_r.c
1 /* Copyright (C) 1996-2000,2002,2007 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    <http://www.gnu.org/licenses/>.  */
18
19 #include <netdb.h>
20 #include <string.h>
21
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 #define NEED__RES_HCONF 1
31 /* If the addr parameter is the IPv6 unspecified address no query must
32    be performed.  */
33 #define PREPROCESS \
34   if (len == sizeof (struct in6_addr)                                         \
35       && __builtin_expect (memcmp (&in6addr_any, addr,                        \
36                                    sizeof (struct in6_addr)), 1) == 0)        \
37     {                                                                         \
38       *h_errnop = HOST_NOT_FOUND;                                             \
39       *result = NULL;                                                         \
40       return ENOENT;                                                          \
41     }
42 #define POSTPROCESS \
43   if (status == NSS_STATUS_SUCCESS)                                           \
44     {                                                                         \
45       _res_hconf_reorder_addrs (resbuf);                                      \
46       _res_hconf_trim_domains (resbuf);                                       \
47     }
48
49 /* Special name for the lookup function.  */
50 #define DB_LOOKUP_FCT __nss_hosts_lookup2
51
52 #include "../nss/getXXbyYY_r.c"