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/* Copyright (C) 1993-2020 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
<https://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_ */
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