NetBSD/include/resolv.h

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/* $NetBSD: resolv.h,v 1.30 2005/02/03 04:39:32 perry Exp $ */
/*
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* Copyright (c) 1983, 1987, 1989
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
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*/
/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (c) 1996-1999 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* @(#)resolv.h 8.1 (Berkeley) 6/2/93
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* Id: resolv.h,v 1.7.2.11.4.2 2004/06/25 00:41:05 marka Exp
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*/
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#ifndef _RESOLV_H_
#define _RESOLV_H_
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#include <sys/param.h>
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#if (!defined(BSD)) || (BSD < 199306)
# include <sys/bitypes.h>
#else
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#include <sys/types.h>
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#endif
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#include <sys/cdefs.h>
#include <sys/socket.h>
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#include <stdio.h>
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#include <arpa/nameser.h>
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/*
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* Revision information. This is the release date in YYYYMMDD format.
* It can change every day so the right thing to do with it is use it
* in preprocessor commands such as "#if (__RES > 19931104)". Do not
* compare for equality; rather, use it to determine whether your resolver
* is new enough to contain a certain feature.
*/
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#define __RES 20030124
/*
* This used to be defined in res_query.c, now it's in herror.c.
* [XXX no it's not. It's in irs/irs_data.c]
* It was
* never extern'd by any *.h file before it was placed here. For thread
* aware programs, the last h_errno value set is stored in res->h_errno.
*
* XXX: There doesn't seem to be a good reason for exposing RES_SET_H_ERRNO
* (and __h_errno_set) to the public via <resolv.h>.
* XXX: __h_errno_set is really part of IRS, not part of the resolver.
* If somebody wants to build and use a resolver that doesn't use IRS,
* what do they do? Perhaps something like
* #ifdef WANT_IRS
* # define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x)
* #else
* # define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x))
* #endif
*/
#define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x)
struct __res_state; /* forward */
__BEGIN_DECLS
void __h_errno_set(struct __res_state *, int);
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__END_DECLS
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/*
* Resolver configuration file.
* Normally not present, but may contain the address of the
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* initial name server(s) to query and the domain search list.
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*/
#ifndef _PATH_RESCONF
#define _PATH_RESCONF "/etc/resolv.conf"
#endif
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typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
res_sendhookact;
typedef res_sendhookact (*res_send_qhook)(struct sockaddr * const *,
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const u_char **, int *,
u_char *, int, int *);
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typedef res_sendhookact (*res_send_rhook)(const struct sockaddr *,
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const u_char *, int, u_char *,
int, int *);
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struct res_sym {
int number; /* Identifying number, like T_MX */
const char * name; /* Its symbolic name, like "MX" */
const char * humanname; /* Its fun name, like "mail exchanger" */
};
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/*
* Global defines and variables for resolver stub.
*/
#define MAXNS 3 /* max # name servers we'll track */
#define MAXDFLSRCH 3 /* # default domain levels to try */
#define MAXDNSRCH 6 /* max # domains in search path */
#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
#define RES_TIMEOUT 5 /* min. seconds between retries */
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#define MAXRESOLVSORT 10 /* number of net to sort on */
#define RES_MAXNDOTS 15 /* should reflect bit field size */
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#define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */
#define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */
#define RES_DFLRETRY 2 /* Default #/tries. */
#define RES_MAXTIME 65535 /* Infinity, in milliseconds. */
struct __res_state_ext;
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struct __res_state {
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int retrans; /* retransmission time interval */
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int retry; /* number of times to retransmit */
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#ifdef sun
u_int options; /* option flags - see below. */
#else
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u_long options; /* option flags - see below. */
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#endif
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int nscount; /* number of name servers */
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struct sockaddr_in
nsaddr_list[MAXNS]; /* address of name server */
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#define nsaddr nsaddr_list[0] /* for backward compatibility */
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u_short id; /* current message id */
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char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
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char defdname[256]; /* default domain (deprecated) */
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#ifdef sun
u_int pfcode; /* RES_PRF_ flags - see below. */
#else
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u_long pfcode; /* RES_PRF_ flags - see below. */
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#endif
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unsigned ndots:4; /* threshold for initial abs. query */
unsigned nsort:4; /* number of elements in sort_list[] */
char unused[3];
struct {
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struct in_addr addr;
u_int32_t mask;
} sort_list[MAXRESOLVSORT];
#ifdef __OLD_RES_STATE
char lookups[4];
#else
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res_send_qhook qhook; /* query hook */
res_send_rhook rhook; /* response hook */
int res_h_errno; /* last one set for this context */
int _vcsock; /* PRIVATE: for res_send VC i/o */
u_int _flags; /* PRIVATE: see below */
u_int _pad; /* make _u 64 bit aligned */
union {
/* On an 32-bit arch this means 512b total. */
char pad[72 - 4*sizeof (int) - 2*sizeof (void *)];
struct {
u_int16_t nscount;
u_int16_t nstimes[MAXNS]; /* ms. */
int nssocks[MAXNS];
struct __res_state_ext *ext; /* extention for IPv6 */
} _ext;
} _u;
#endif
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};
typedef struct __res_state *res_state;
union res_sockaddr_union {
struct sockaddr_in sin;
#ifdef IN6ADDR_ANY_INIT
struct sockaddr_in6 sin6;
#endif
#ifdef ISC_ALIGN64
int64_t __align64; /* 64bit alignment */
#else
int32_t __align32; /* 32bit alignment */
#endif
char __space[128]; /* max size */
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};
/*
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* Resolver flags (used to be discrete per-module statics ints).
*/
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#define RES_F_VC 0x00000001 /* socket is TCP */
#define RES_F_CONN 0x00000002 /* socket is connected */
#define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors */
#define RES_F__UNUSED 0x00000008 /* (unused) */
#define RES_F_LASTMASK 0x000000F0 /* ordinal server of last res_nsend */
#define RES_F_LASTSHIFT 4 /* bit position of LASTMASK "flag" */
#define RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT)
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/* res_findzonecut2() options */
#define RES_EXHAUSTIVE 0x00000001 /* always do all queries */
#define RES_IPV4ONLY 0x00000002 /* IPv4 only */
#define RES_IPV6ONLY 0x00000004 /* IPv6 only */
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/*
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* Resolver options (keep these in synch with res_debug.c, please)
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*/
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#define RES_INIT 0x00000001 /* address initialized */
#define RES_DEBUG 0x00000002 /* print debug messages */
#define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/
#define RES_USEVC 0x00000008 /* use virtual circuit */
#define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */
#define RES_IGNTC 0x00000020 /* ignore trucation errors */
#define RES_RECURSE 0x00000040 /* recursion desired */
#define RES_DEFNAMES 0x00000080 /* use default domain name */
#define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
#define RES_DNSRCH 0x00000200 /* search up local domain tree */
#define RES_INSECURE1 0x00000400 /* type 1 security disabled */
#define RES_INSECURE2 0x00000800 /* type 2 security disabled */
#define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
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#define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */
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#define RES_ROTATE 0x00004000 /* rotate ns list after each query */
#define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */
#define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */
#define RES_BLAST 0x00020000 /* blast all recursive servers */
#define RES_NOTLDQUERY 0x00100000 /* don't unqualified name as a tld */
#define RES_USE_DNSSEC 0x00200000 /* use DNSSEC using OK bit in OPT */
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/* #define RES_DEBUG2 0x00400000 */ /* nslookup internal */
/* KAME extensions: use higher bit to avoid conflict with ISC use */
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#define RES_USE_DNAME 0x10000000 /* use DNAME */
#define RES_USE_EDNS0 0x40000000 /* use EDNS0 if configured */
#define RES_NO_NIBBLE2 0x80000000 /* disable alternate nibble lookup */
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#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | \
RES_DNSRCH | RES_NO_NIBBLE2)
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/*
* Resolver "pfcode" values. Used by dig.
*/
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#define RES_PRF_STATS 0x00000001
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#define RES_PRF_UPDATE 0x00000002
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#define RES_PRF_CLASS 0x00000004
#define RES_PRF_CMD 0x00000008
#define RES_PRF_QUES 0x00000010
#define RES_PRF_ANS 0x00000020
#define RES_PRF_AUTH 0x00000040
#define RES_PRF_ADD 0x00000080
#define RES_PRF_HEAD1 0x00000100
#define RES_PRF_HEAD2 0x00000200
#define RES_PRF_TTLID 0x00000400
#define RES_PRF_HEADX 0x00000800
#define RES_PRF_QUERY 0x00001000
#define RES_PRF_REPLY 0x00002000
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#define RES_PRF_INIT 0x00004000
#define RES_PRF_TRUNC 0x00008000
/* 0x00010000 */
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/* Things involving an internal (static) resolver context. */
__BEGIN_DECLS
extern struct __res_state *__res_get_state(void);
extern void __res_put_state(struct __res_state *);
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/*
* Source and Binary compatibility; _res will not work properly
* with multi-threaded programs.
*/
extern struct __res_state *__res_state(void);
#define _res (*__res_state())
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__END_DECLS
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#ifndef __BIND_NOSTATIC
#define fp_nquery __fp_nquery
#define fp_query __fp_query
#define hostalias __hostalias
#define p_query __p_query
#define res_close __res_close
#define res_opt __res_opt
#define res_isourserver __res_isourserver
#define res_querydomain __res_querydomain
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#define res_send __res_send
#define res_sendsigned __res_sendsigned
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#ifdef BIND_RES_POSIX3
#define dn_expand __dn_expand
#define res_init __res_init
#define res_query __res_query
#define res_search __res_search
#define res_mkquery __res_mkquery
#endif
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__BEGIN_DECLS
void fp_nquery(const u_char *, int, FILE *);
void fp_query(const u_char *, FILE *);
const char * hostalias(const char *);
void p_query(const u_char *);
void res_close(void);
int res_init(void);
int res_opt(int, u_char *, int, int);
int res_isourserver(const struct sockaddr_in *);
int res_mkquery(int, const char *, int, int, const u_char *,
int, const u_char *, u_char *, int);
int res_query(const char *, int, int, u_char *, int);
int res_querydomain(const char *, const char *, int, int,
u_char *, int);
int res_search(const char *, int, int, u_char *, int);
int res_send(const u_char *, int, u_char *, int);
int res_sendsigned(const u_char *, int, ns_tsig_key *,
u_char *, int);
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__END_DECLS
#endif
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#if !defined(SHARED_LIBBIND) || defined(LIB)
/*
* If libbind is a shared object (well, DLL anyway)
* these externs break the linker when resolv.h is
* included by a lib client (like named)
* Make them go away if a client is including this
*
*/
extern const struct res_sym __p_key_syms[];
extern const struct res_sym __p_cert_syms[];
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extern const struct res_sym __p_class_syms[];
extern const struct res_sym __p_type_syms[];
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extern const struct res_sym __p_rcode_syms[];
#endif /* SHARED_LIBBIND */
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#define b64_ntop __b64_ntop
#define b64_pton __b64_pton
#define dn_comp __dn_comp
#define dn_count_labels __dn_count_labels
#define dn_skipname __dn_skipname
#define fp_resstat __fp_resstat
#define loc_aton __loc_aton
#define loc_ntoa __loc_ntoa
#define p_cdname __p_cdname
#define p_cdnname __p_cdnname
#define p_class __p_class
#define p_fqname __p_fqname
#define p_fqnname __p_fqnname
#define p_option __p_option
#define p_secstodate __p_secstodate
#define p_section __p_section
#define p_time __p_time
#define p_type __p_type
#define p_rcode __p_rcode
#define p_sockun __p_sockun
#define putlong __putlong
#define putshort __putshort
#define res_dnok __res_dnok
#define res_findzonecut __res_findzonecut
#define res_findzonecut2 __res_findzonecut2
#define res_hnok __res_hnok
#define res_hostalias __res_hostalias
#define res_mailok __res_mailok
#define res_nameinquery __res_nameinquery
#define res_nclose __res_nclose
#define res_ninit __res_ninit
#define res_nmkquery __res_nmkquery
#define res_pquery __res_pquery
#define res_nquery __res_nquery
#define res_nquerydomain __res_nquerydomain
#define res_nsearch __res_nsearch
#define res_nsend __res_nsend
#define res_nsendsigned __res_nsendsigned
#define res_nisourserver __res_nisourserver
#define res_ownok __res_ownok
#define res_queriesmatch __res_queriesmatch
#define res_randomid __res_randomid
#define sym_ntop __sym_ntop
#define sym_ntos __sym_ntos
#define sym_ston __sym_ston
#define res_nopt __res_nopt
#define res_ndestroy __res_ndestroy
#define res_nametoclass __res_nametoclass
#define res_nametotype __res_nametotype
#define res_setservers __res_setservers
#define res_getservers __res_getservers
#define res_buildprotolist __res_buildprotolist
#define res_destroyprotolist __res_destroyprotolist
#define res_destroyservicelist __res_destroyservicelist
#define res_get_nibblesuffix __res_get_nibblesuffix
#define res_get_nibblesuffix2 __res_get_nibblesuffix2
#define res_ourserver_p __res_ourserver_p
#define res_protocolname __res_protocolname
#define res_protocolnumber __res_protocolnumber
#define res_send_setqhook __res_send_setqhook
#define res_send_setrhook __res_send_setrhook
#define res_servicename __res_servicename
#define res_servicenumber __res_servicenumber
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__BEGIN_DECLS
int res_hnok(const char *);
int res_ownok(const char *);
int res_mailok(const char *);
int res_dnok(const char *);
int sym_ston(const struct res_sym *, const char *, int *);
const char * sym_ntos(const struct res_sym *, int, int *);
const char * sym_ntop(const struct res_sym *, int, int *);
int b64_ntop(u_char const *, size_t, char *, size_t);
int b64_pton(char const *, u_char *, size_t);
int loc_aton(const char *, u_char *);
const char * loc_ntoa(const u_char *, char *);
int dn_skipname(const u_char *, const u_char *);
void putlong(u_int32_t, u_char *);
void putshort(u_int16_t, u_char *);
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#ifndef __ultrix__
u_int16_t _getshort(const u_char *);
u_int32_t _getlong(const u_char *);
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#endif
const char * p_class(int);
const char * p_time(u_int32_t);
const char * p_type(int);
const char * p_rcode(int);
const char * p_sockun(union res_sockaddr_union, char *, size_t);
const u_char * p_cdnname(const u_char *, const u_char *, int, FILE *);
const u_char * p_cdname(const u_char *, const u_char *, FILE *);
const u_char * p_fqnname(const u_char *, const u_char *,
int, char *, int);
const u_char * p_fqname(const u_char *, const u_char *, FILE *);
const char * p_option(u_long);
char * p_secstodate(u_long);
int dn_count_labels(const char *);
int dn_comp(const char *, u_char *, int, u_char **, u_char **);
int dn_expand(const u_char *, const u_char *, const u_char *,
char *, int);
u_int res_randomid(void);
int res_nameinquery(const char *, int, int, const u_char *,
const u_char *);
int res_queriesmatch(const u_char *, const u_char *,
const u_char *, const u_char *);
const char * p_section(int, int);
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/* Things involving a resolver context. */
int res_ninit(res_state);
int res_nisourserver(const res_state, const struct sockaddr_in *);
void fp_resstat(const res_state, FILE *);
void res_pquery(const res_state, const u_char *, int, FILE *);
const char * res_hostalias(const res_state, const char *, char *, size_t);
int res_nquery(res_state, const char *, int, int, u_char *, int);
int res_nsearch(res_state, const char *, int, int, u_char *, int);
int res_nquerydomain(res_state, const char *, const char *,
int, int, u_char *, int);
int res_nmkquery(res_state, int, const char *, int, int,
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const u_char *, int, const u_char *,
u_char *, int);
int res_nsend(res_state, const u_char *, int, u_char *, int);
int res_nsendsigned(res_state, const u_char *, int,
ns_tsig_key *, u_char *, int);
int res_findzonecut(res_state, const char *, ns_class, int,
char *, size_t, struct in_addr *, int);
int res_findzonecut2(res_state, const char *, ns_class, int,
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char *, size_t,
union res_sockaddr_union *, int);
void res_nclose(res_state);
int res_nopt(res_state, int, u_char *, int, int);
void res_send_setqhook(res_send_qhook);
void res_send_setrhook(res_send_rhook);
int __res_vinit(res_state, int);
void res_destroyservicelist(void);
const char * res_servicename(u_int16_t, const char *);
const char * res_protocolname(int);
void res_destroyprotolist(void);
void res_buildprotolist(void);
const char * res_get_nibblesuffix(res_state);
const char * res_get_nibblesuffix2(res_state);
void res_ndestroy(res_state);
u_int16_t res_nametoclass(const char *, int *);
u_int16_t res_nametotype(const char *, int *);
void res_setservers(res_state,
const union res_sockaddr_union *, int);
int res_getservers(res_state,
union res_sockaddr_union *, int);
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__END_DECLS
#endif /* !_RESOLV_H_ */