| /* Copyright (C) 1993-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by David Mosberger (davidm@azstarnet.com). |
| |
| 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/>. */ |
| |
| #ifndef _RES_HCONF_H_ |
| #define _RES_HCONF_H_ |
| |
| #include <netdb.h> |
| |
| #define TRIMDOMAINS_MAX 4 |
| |
| struct hconf |
| { |
| /* We keep the INITIALIZED member only for backwards compatibility. New |
| code should just call _res_hconf_init unconditionally. For this field |
| to be used safely, users must ensure that either (1) a call to |
| _res_hconf_init happens-before any load from INITIALIZED, or (2) an |
| assignment of zero to INITIALIZED happens-before any load from it, and |
| these loads use acquire MO if the intent is to skip calling |
| _res_hconf_init if the load returns a nonzero value. Such acquire MO |
| loads will then synchronize with the release MO store to INITIALIZED |
| in do_init in res_hconf.c; see pthread_once for more detail. */ |
| int initialized; |
| int unused1; |
| int unused2[4]; |
| int num_trimdomains; |
| const char *trimdomain[TRIMDOMAINS_MAX]; |
| unsigned int flags; |
| # define HCONF_FLAG_INITED (1 << 0) /* initialized? */ |
| # define HCONF_FLAG_REORDER (1 << 3) /* list best address first */ |
| # define HCONF_FLAG_MULTI (1 << 4) /* see comments for gethtbyname() */ |
| }; |
| extern struct hconf _res_hconf; |
| |
| extern void _res_hconf_init (void) attribute_hidden; |
| extern void _res_hconf_trim_domain (char *domain); |
| extern void _res_hconf_trim_domains (struct hostent *hp); |
| extern void _res_hconf_reorder_addrs (struct hostent *hp); |
| |
| #endif /* _RES_HCONF_H_ */ |
