Rev 616 | Blame | Compare with Previous | Last modification | View Log | RSS feed
/*!\file resolv.h
* Resolver API.
*/
/*-
* 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) 1993 by Digital Equipment Corporation.
*
* 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, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION 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.
* -
* --Copyright--
*
* @(#)resolv.h 8.1 (Berkeley) 6/2/93
* From Id: resolv.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp
* $Id: resolv.h,v 1.7 1996/08/29 20:00:58 peter Exp $
*/
#ifndef _RESOLV_H_
#define _RESOLV_H_
#include <stdio.h>
#ifndef __SYS_W32API_H
#include <sys/w32api.h>
#endif
#ifndef __SYS_PARAM_H
#include <sys/param.h>
#endif
#ifndef __SYS_WTYPES_H
#include <sys/wtypes.h>
#endif
#ifndef __SYS_CDEFS_H
#include <sys/cdefs.h>
#endif
/*
* 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 19960229
/*
* 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 packet id */
char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
char defdname[MAXDNAME]; /* default domain */
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_long 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_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
/*
* Resolver "pfcode" values. Used by dig.
*/
#define RES_PRF_STATS 0x00000001
/* 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 */
/* hooks are still experimental as of 4.9.2 */
typedef enum {
res_goahead,
res_nextns,
res_modified,
res_done,
res_error
} res_sendhookact;
typedef res_sendhookact (*res_send_qhook)(struct sockaddr_in * const *ns,
const u_char **query,
int *querylen,
u_char *ans,
int anssiz,
int *resplen);
typedef res_sendhookact (*res_send_rhook)(const struct sockaddr_in *ns,
const u_char *query,
int querylen,
u_char *ans,
int anssiz,
int *resplen);
W32_DATA struct __res_state _res;
W32_DATA int h_errno;
/* 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 loc_ntoa __loc_ntoa
#define loc_aton __loc_aton
#define dn_skipname __dn_skipname
#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_cdnname __p_cdnname
#define p_cdname __p_cdname
#define p_fqname __p_fqname
#define p_rr __p_rr
#define p_option __p_option
#define res_randomid __res_randomid
#define res_isourserver __res_isourserver
#define res_nameinquery __res_nameinquery
#define res_queriesmatch __res_queriesmatch
__BEGIN_DECLS
W32_FUNC int __res_hnok (const char *);
W32_FUNC int __res_ownok (const char *);
W32_FUNC int __res_mailok (const char *);
W32_FUNC int __res_dnok (const char *);
W32_FUNC int __loc_aton (const char *ascii, u_char *binary);
W32_FUNC char * __loc_ntoa (const u_char *binary, char *ascii);
W32_FUNC int __dn_skipname(const u_char *, const u_char *);
W32_FUNC void __fp_resstat (struct __res_state *, FILE *);
W32_FUNC void __fp_query (const u_char *, FILE *);
W32_FUNC void __fp_nquery (const u_char *, int, FILE *);
W32_FUNC char *__hostalias (const char *);
W32_FUNC void __putlong (u_long, u_char *);
W32_FUNC void __putshort (u_short, u_char *);
W32_FUNC char *__p_time (u_long);
W32_FUNC void __p_query (const u_char *);
W32_FUNC const u_char *__p_cdnname (const u_char *, const u_char *, int, FILE *);
W32_FUNC const u_char *__p_cdname (const u_char *, const u_char *, FILE *);
W32_FUNC const u_char *__p_fqname (const u_char *, const u_char *, FILE *);
W32_FUNC const u_char *__p_rr (const u_char *, const u_char *, FILE *);
W32_FUNC const char *__p_type (int);
W32_FUNC const char *__p_class (int);
W32_FUNC const char *__p_option (u_long option);
W32_FUNC int dn_comp (const char *, u_char *, int, u_char **, u_char **);
W32_FUNC int dn_expand (const u_char *, const u_char *, const u_char *, char *, int);
W32_FUNC int res_init (void);
W32_FUNC u_short res_randomid (void);
W32_FUNC int res_query (const char *, int, int, u_char *, int);
W32_FUNC int res_search (const char *, int, int, u_char *, int);
W32_FUNC int res_querydomain (const char *, const char *, int, int, u_char *, int);
W32_FUNC int res_mkquery (int, const char *, int, int, const u_char *, int, const u_char *, u_char *, int);
W32_FUNC int res_send (const u_char *, int, u_char *, int);
W32_FUNC int res_isourserver (const struct sockaddr_in *);
W32_FUNC int res_nameinquery (const char *, int, int, const u_char *, const u_char *);
W32_FUNC int res_queriesmatch(const u_char *, const u_char *, const u_char *, const u_char *);
W32_FUNC void res_send_setqhook (res_send_qhook hook);
W32_FUNC void res_send_setrhook (res_send_rhook hook);
__END_DECLS
#endif /* !_RESOLV_H_ */