DragonFlyBSD

/*

* 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. All advertising materials mentioning features or use of this software

* must display the following acknowledgement:

* This product includes software developed by the University of

* California, Berkeley and its contributors.

* 4. Neither the name of the University nor the names of its contributors

* may be used to endorse or promote products derived from this software

* without specific prior written permission.

*

* 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.

*/

/*

* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")

* Portions Copyright (c) 1996-1999 by Internet Software Consortium.

*

* Permission to use, copy, modify, and distribute this software for any

* purpose with or without fee is hereby granted, provided that the above

* 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

* $Id: resolv.h,v 1.23.564.1 2008/04/03 02:12:21 marka Exp $

*/

#ifndef _RESOLV_H_

#define _RESOLV_H_

#include <sys/param.h>

#if (!defined(BSD)) || (BSD < 199306)

# include <sys/bitypes.h>

#else

# include <sys/types.h>

#endif

#include <sys/cdefs.h>

#include <sys/socket.h>

#include <stdio.h>

#include <arpa/nameser.h>

/*%

* 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.

*/

#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 *res, int err);

__END_DECLS

/*%

* Resolver configuration file.

* Normally not present, but may contain the address of the

* initial name server(s) to query and the domain search list.

*/

#ifndef _PATH_RESCONF

#define _PATH_RESCONF "/etc/resolv.conf"

#endif

typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }

res_sendhookact;

#ifndef __PMT

#if defined(__STDC__) || defined(__cplusplus)

#define __PMT(args) args

#else

#define __PMT(args) ()

#endif

#endif

typedef res_sendhookact (*res_send_qhook)__PMT((struct sockaddr * const *,

const u_char **, int *,

u_char *, int, int *));

typedef res_sendhookact (*res_send_rhook)__PMT((const struct sockaddr *,

const u_char *, int, u_char *,

int, int *));

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" */

};

/*%

* 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 */

#define MAXRESOLVSORT 10 /*%< number of net to sort on */

#define RES_MAXNDOTS 15 /*%< should reflect bit field size */

#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;

struct __res_state {

int retrans; /*%< retransmission time interval */

int retry; /*%< number of times to retransmit */

#ifdef sun

u_int options; /*%< option flags - see below. */

#else

u_long options; /*%< option flags - see below. */

#endif

int nscount; /*%< number of name servers */

struct sockaddr_in

nsaddr_list[MAXNS]; /*%< address of name server */

#define nsaddr nsaddr_list[0] /*%< for backward compatibility */

u_short id; /*%< current message id */

char *dnsrch[MAXDNSRCH+1]; /*%< components of domain to search */

char defdname[256]; /*%< default domain (deprecated) */

#ifdef sun

u_int pfcode; /*%< RES_PRF_ flags - see below. */

#else

u_long pfcode; /*%< RES_PRF_ flags - see below. */

#endif

unsigned ndots:4; /*%< threshold for initial abs. query */

unsigned nsort:4; /*%< number of elements in sort_list[] */

char unused[3];

struct {

struct in_addr addr;

u_int32_t mask;

} sort_list[MAXRESOLVSORT];

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;

};

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 */

};

/*%

* Resolver flags (used to be discrete per-module statics ints).

*/

#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)

/* res_findzonecut2() options */

#define RES_EXHAUSTIVE 0x00000001 /*%< always do all queries */

#define RES_IPV4ONLY 0x00000002 /*%< IPv4 only */

#define RES_IPV6ONLY 0x00000004 /*%< IPv6 only */

/*%

* Resolver options (keep these in synch with res_debug.c, please)

*/

#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 */

#define RES_USE_INET6 0x00002000 /*%< use/map IPv6 in gethostbyname() */

#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_NSID 0x00040000 /*%< request name server ID */

#define RES_NOTLDQUERY 0x00100000 /*%< don't unqualified name as a tld */

#define RES_USE_DNSSEC 0x00200000 /*%< use DNSSEC using OK bit in OPT */

/* #define RES_DEBUG2 0x00400000 */ /* nslookup internal */

/* KAME extensions: use higher bit to avoid conflict with ISC use */

#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 */

#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | \

RES_DNSRCH | RES_NO_NIBBLE2)

/*%

* Resolver "pfcode" values. Used by dig.

*/

#define RES_PRF_STATS 0x00000001

#define RES_PRF_UPDATE 0x00000002

#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

#define RES_PRF_INIT 0x00004000

#define RES_PRF_TRUNC 0x00008000

/* 0x00010000 */

/* Things involving an internal (static) resolver context. */

#ifdef _REENTRANT

__BEGIN_DECLS

extern struct __res_state *__res_state(void);

__END_DECLS

#define _res (*__res_state())

#else

#ifdef __linux

__BEGIN_DECLS

extern struct __res_state * __res_state(void);

__END_DECLS

#endif

#ifndef __BIND_NOSTATIC

extern struct __res_state _res;

#endif

#endif

#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_init __res_init

#define res_isourserver __res_isourserver

#define res_mkquery __res_mkquery

#define res_query __res_query

#define res_querydomain __res_querydomain

#define res_search __res_search

#define res_send __res_send

#define res_sendsigned __res_sendsigned

__BEGIN_DECLS

void fp_nquery __P((const u_char *, int, FILE *));

void fp_query __P((const u_char *, FILE *));

const char * hostalias __P((const char *));

void p_query __P((const u_char *));

void res_close __P((void));

int res_init __P((void));

int res_isourserver __P((const struct sockaddr_in *));

int res_mkquery __P((int, const char *, int, int, const u_char *,

int, const u_char *, u_char *, int));

int res_query __P((const char *, int, int, u_char *, int));

int res_querydomain __P((const char *, const char *, int, int,

u_char *, int));

int res_search __P((const char *, int, int, u_char *, int));

int res_send __P((const u_char *, int, u_char *, int));

int res_sendsigned __P((const u_char *, int, ns_tsig_key *,

u_char *, int));

__END_DECLS

#endif

#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[];

extern const struct res_sym __p_class_syms[];

extern const struct res_sym __p_type_syms[];

extern const struct res_sym __p_rcode_syms[];

#endif /* SHARED_LIBBIND */

#define b64_ntop __b64_ntop

#define b64_pton __b64_pton

#define dn_comp __dn_comp

#define dn_count_labels __dn_count_labels

#define dn_expand __dn_expand

#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_nopt_rdata __res_nopt_rdata

#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

__BEGIN_DECLS

int res_hnok __P((const char *));

int res_ownok __P((const char *));

int res_mailok __P((const char *));

int res_dnok __P((const char *));

int sym_ston __P((const struct res_sym *, const char *, int *));

const char * sym_ntos __P((const struct res_sym *, int, int *));

const char * sym_ntop __P((const struct res_sym *, int, int *));

int b64_ntop __P((u_char const *, size_t, char *, size_t));

int b64_pton __P((char const *, u_char *, size_t));

int loc_aton __P((const char *, u_char *));

const char * loc_ntoa __P((const u_char *, char *));

int dn_skipname __P((const u_char *, const u_char *));

void putlong __P((u_int32_t, u_char *));

void putshort __P((u_int16_t, u_char *));

#ifndef __ultrix__

u_int16_t _getshort __P((const u_char *));

u_int32_t _getlong __P((const u_char *));

#endif

const char * p_class __P((int));

const char * p_time __P((u_int32_t));

const char * p_type __P((int));

const char * p_rcode __P((int));

const char * p_sockun __P((union res_sockaddr_union, char *, size_t));

const u_char * p_cdnname __P((const u_char *, const u_char *, int, FILE *));

const u_char * p_cdname __P((const u_char *, const u_char *, FILE *));

const u_char * p_fqnname __P((const u_char *, const u_char *,

int, char *, int));

const u_char * p_fqname __P((const u_char *, const u_char *, FILE *));

const char * p_option __P((u_long));

char * p_secstodate __P((u_long));

int dn_count_labels __P((const char *));

int dn_comp __P((const char *, u_char *, int,

u_char **, u_char **));

int dn_expand __P((const u_char *, const u_char *, const u_char *,

char *, int));

u_int res_randomid __P((void));

int res_nameinquery __P((const char *, int, int, const u_char *,

const u_char *));

int res_queriesmatch __P((const u_char *, const u_char *,

const u_char *, const u_char *));

const char * p_section __P((int, int));

/* Things involving a resolver context. */

int res_ninit __P((res_state));

int res_nisourserver __P((const res_state,

const struct sockaddr_in *));

void fp_resstat __P((const res_state, FILE *));

void res_pquery __P((const res_state, const u_char *, int, FILE *));

const char * res_hostalias __P((const res_state, const char *,

char *, size_t));

int res_nquery __P((res_state, const char *, int, int,

u_char *, int));

int res_nsearch __P((res_state, const char *, int, int, u_char *,

int));

int res_nquerydomain __P((res_state, const char *, const char *,

int, int, u_char *, int));

int res_nmkquery __P((res_state, int, const char *, int, int,

const u_char *, int, const u_char *,

u_char *, int));

int res_nsend __P((res_state, const u_char *, int, u_char *, int));

int res_nsendsigned __P((res_state, const u_char *, int,

ns_tsig_key *, u_char *, int));

int res_findzonecut __P((res_state, const char *, ns_class, int,

char *, size_t, struct in_addr *, int));

int res_findzonecut2 __P((res_state, const char *, ns_class, int,

char *, size_t,

union res_sockaddr_union *, int));

void res_nclose __P((res_state));

int res_nopt __P((res_state, int, u_char *, int, int));

int res_nopt_rdata __P((res_state, int, u_char *, int, u_char *,

u_short, u_short, u_char *));

void res_send_setqhook __P((res_send_qhook));

void res_send_setrhook __P((res_send_rhook));

int __res_vinit __P((res_state, int));

void res_destroyservicelist __P((void));

const char * res_servicename __P((u_int16_t, const char *));

const char * res_protocolname __P((int));

void res_destroyprotolist __P((void));

void res_buildprotolist __P((void));

const char * res_get_nibblesuffix __P((res_state));

const char * res_get_nibblesuffix2 __P((res_state));

void res_ndestroy __P((res_state));

u_int16_t res_nametoclass __P((const char *, int *));

u_int16_t res_nametotype __P((const char *, int *));

void res_setservers __P((res_state,

const union res_sockaddr_union *, int));

int res_getservers __P((res_state,

union res_sockaddr_union *, int));

__END_DECLS

#endif /* !_RESOLV_H_ */

/*! \file */

#ifdef _LIBC

int

res_opt(int n0, u_char *buf, int buflen, int anslen)

{

return (res_nopt(&_res, n0, buf, buflen, anslen));

}

#endif

#ifdef _LIBC

/*

* Weak aliases for applications that use certain private entry points,

* and fail to include <resolv.h>.

*/

#undef res_init

__weak_reference(__res_init, res_init);

#undef p_query

__weak_reference(__p_query, p_query);

#undef res_mkquery

__weak_reference(__res_mkquery, res_mkquery);

#undef res_query

__weak_reference(__res_query, res_query);

#undef res_send

__weak_reference(__res_send, res_send);

#undef res_close

__weak_reference(__res_close, _res_close);

#undef res_search

__weak_reference(__res_search, res_search);

#undef res_querydomain

__weak_reference(__res_querydomain, res_querydomain);

#endif