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/*!\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 $ |
*/ |
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#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; |
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/* 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); |
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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); |
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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 *); |
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W32_FUNC void res_send_setqhook (res_send_qhook hook); |
W32_FUNC void res_send_setrhook (res_send_rhook hook); |
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__END_DECLS |
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#endif /* !_RESOLV_H_ */ |