0160f9c065
since it has far wider impact than hostname lookups (including passwords). Note that this has more ugly symbol hiding and binary compatability hacks that can go away the second we bump majors. Obtained from: Mostly from diff against ISC bind-8.1.2 sources
305 lines
12 KiB
C
305 lines
12 KiB
C
/*-
|
|
* Copyright (c) 1983, 1987, 1989, 1993
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Portions Copyright (c) 1996 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
|
|
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
|
|
* CONSORTIUM 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
|
|
* From Id: resolv.h,v 8.12 1998/04/28 19:36:46 halley Exp $
|
|
* $Id: resolv.h,v 1.14 1997/09/01 01:19:10 brian Exp $
|
|
*/
|
|
|
|
#ifndef _RESOLV_H_
|
|
#define _RESOLV_H_
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/cdefs.h>
|
|
#include <stdio.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 19960801
|
|
|
|
/*
|
|
* This used to be defined in res_query.c, now it's in herror.c. It was
|
|
* never extern'd by any *.h file before it was placed here. herror.c is
|
|
* part of libresolv.a even though it might make more sense in libnetdb.a
|
|
* or even libnet.a.
|
|
*/
|
|
|
|
extern int h_errno;
|
|
|
|
/*
|
|
* Resolver configuration file.
|
|
* Normally not present, but may contain the address of the
|
|
* inital name server(s) to query and the domain search list.
|
|
*/
|
|
|
|
#ifndef _PATH_RESCONF
|
|
#define _PATH_RESCONF "/etc/resolv.conf"
|
|
#endif
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
struct __res_state {
|
|
int retrans; /* retransmition time interval */
|
|
int retry; /* number of times to retransmit */
|
|
u_long options; /* option flags - see below. */
|
|
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) */
|
|
u_long pfcode; /* RES_PRF_ flags - see below. */
|
|
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];
|
|
char pad[72]; /* on an i386 this means 512b total */
|
|
};
|
|
|
|
/*
|
|
* 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 truncation 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_NOTLDQUERY 0x00004000 /* Don't query TLD names */
|
|
|
|
#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
|
|
|
|
/*
|
|
* 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
|
|
/* 0x00008000 */
|
|
|
|
typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
|
|
res_sendhookact;
|
|
|
|
typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns,
|
|
const u_char **query,
|
|
int *querylen,
|
|
u_char *ans,
|
|
int anssiz,
|
|
int *resplen));
|
|
|
|
typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns,
|
|
const u_char *query,
|
|
int querylen,
|
|
u_char *ans,
|
|
int anssiz,
|
|
int *resplen));
|
|
|
|
struct res_sym {
|
|
int number; /* Identifying number, like T_MX */
|
|
char * name; /* Its symbolic name, like "MX" */
|
|
char * humanname; /* Its fun name, like "mail exchanger" */
|
|
};
|
|
|
|
extern struct __res_state _res;
|
|
extern const struct res_sym __p_class_syms[];
|
|
extern const struct res_sym __p_type_syms[];
|
|
|
|
/* Private routines shared between libc/net, named, nslookup and others. */
|
|
#define res_hnok __res_hnok
|
|
#define res_ownok __res_ownok
|
|
#define res_mailok __res_mailok
|
|
#define res_dnok __res_dnok
|
|
#define sym_ston __sym_ston
|
|
#define sym_ntos __sym_ntos
|
|
#define sym_ntop __sym_ntop
|
|
#define b64_ntop __b64_ntop
|
|
#define b64_pton __b64_pton
|
|
#define loc_ntoa __loc_ntoa
|
|
#define loc_aton __loc_aton
|
|
#define fp_resstat __fp_resstat /* XXX new divert */
|
|
#define p_query __p_query /* XXX new divert */
|
|
#define dn_skipname __dn_skipname
|
|
#define fp_resstat __fp_resstat
|
|
#define fp_query __fp_query
|
|
#define fp_nquery __fp_nquery
|
|
#define hostalias __hostalias
|
|
#define putlong __putlong
|
|
#define putshort __putshort
|
|
#define p_class __p_class
|
|
#define p_time __p_time
|
|
#define p_type __p_type
|
|
#define p_query __p_query
|
|
#define p_cdnname __p_cdnname
|
|
#define p_section __p_section /* XXX new func in 8.1 */
|
|
#define p_cdname __p_cdname
|
|
#define p_fqnname __p_fqnname
|
|
#define p_fqname __p_fqname
|
|
/* XXX p_rr gone */
|
|
#define p_option __p_option
|
|
#define p_secstodate __p_secstodate
|
|
#define dn_count_labels __dn_count_labels
|
|
#define dn_comp __dn_comp
|
|
#define dn_expand __dn_expand /* XXX unmasked */
|
|
#define res_init __res_init /* XXX unmasked */
|
|
#define res_randomid __res_randomid
|
|
#define res_query __res_query /* XXX unmasked */
|
|
#define res_search __res_search /* XXX unmasked */
|
|
#define res_querydomain __res_querydomain /* XXX unmasked */
|
|
#define res_mkquery __res_mkquery /* XXX unmasked */
|
|
#define res_send __res_send /* XXX unmasked */
|
|
#define res_isourserver __res_isourserver
|
|
#define res_nameinquery __res_nameinquery
|
|
#define res_queriesmatch __res_queriesmatch
|
|
#define res_close __res_close
|
|
#define res_mkupdate __res_mkupdate /* XXX new func in 8.1 */
|
|
#define res_mkupdrec __res_mkupdrec /* XXX new func in 8.1 */
|
|
#define res_freeupdrec __res_freeupdrec /* XXX new func in 8.1 */
|
|
|
|
__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 fp_resstat __P((struct __res_state *, FILE *));
|
|
void fp_query __P((const u_char *, FILE *));
|
|
void fp_nquery __P((const u_char *, int, FILE *));
|
|
const char * hostalias __P((const char *));
|
|
void putlong __P((u_int32_t, u_char *));
|
|
void putshort __P((u_int16_t, u_char *));
|
|
const char * p_class __P((int));
|
|
const char * p_time __P((u_int32_t));
|
|
const char * p_type __P((int));
|
|
void p_query __P((const u_char *));
|
|
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));
|
|
int res_init __P((void));
|
|
u_int res_randomid __P((void));
|
|
int res_query __P((const char *, int, int, u_char *, int));
|
|
int res_search __P((const char *, int, int, u_char *, int));
|
|
int res_querydomain __P((const char *, const char *, int, int,
|
|
u_char *, int));
|
|
int res_mkquery __P((int, const char *, int, int, const u_char *,
|
|
int, const u_char *, u_char *, int));
|
|
int res_send __P((const u_char *, int, u_char *, int));
|
|
int res_isourserver __P((const struct sockaddr_in *));
|
|
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 *));
|
|
void res_close __P((void));
|
|
const char * p_section __P((int, int));
|
|
int res_update __P((ns_updrec *));
|
|
int res_mkupdate __P((ns_updrec *, u_char *, int));
|
|
ns_updrec * res_mkupdrec __P((int, const char *, u_int, u_int, u_long));
|
|
void res_freeupdrec __P((ns_updrec *));
|
|
__END_DECLS
|
|
|
|
#endif /* !_RESOLV_H_ */
|