| 1 | /* Copyright (C) 1996-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library; if not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <netdb.h> |
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| 19 | #include <string.h> |
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| 20 | #include <resolv/res_hconf.h> |
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| 21 | |
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| 22 | #define LOOKUP_TYPE struct hostent |
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| 23 | #define FUNCTION_NAME gethostbyaddr |
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| 24 | #define DATABASE_NAME hosts |
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| 25 | #define ADD_PARAMS const void *addr, socklen_t len, int type |
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| 26 | #define ADD_VARIABLES addr, len, type |
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| 27 | #define NEED_H_ERRNO 1 |
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| 28 | #define NEED__RES 1 |
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| 29 | /* If the addr parameter is the IPv6 unspecified address no query must |
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| 30 | be performed. */ |
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| 31 | #define PREPROCESS \ |
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| 32 | if (len == sizeof (struct in6_addr) \ |
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| 33 | && __builtin_expect (memcmp (&__in6addr_any, addr, \ |
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| 34 | sizeof (struct in6_addr)), 1) == 0) \ |
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| 35 | { \ |
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| 36 | *h_errnop = HOST_NOT_FOUND; \ |
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| 37 | *result = NULL; \ |
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| 38 | return ENOENT; \ |
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| 39 | } |
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| 40 | #define POSTPROCESS \ |
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| 41 | if (status == NSS_STATUS_SUCCESS) \ |
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| 42 | { \ |
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| 43 | _res_hconf_reorder_addrs (resbuf); \ |
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| 44 | _res_hconf_trim_domains (resbuf); \ |
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| 45 | } |
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| 46 | |
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| 47 | /* Special name for the lookup function. */ |
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| 48 | #define DB_LOOKUP_FCT __nss_hosts_lookup2 |
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| 49 | |
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| 50 | #include "../nss/getXXbyYY_r.c" |
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| 51 | |
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