/*
* 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
* 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
* $FreeBSD: release/9.0.0/include/resolv.h 203964 2010-02-16 19:39:50Z imp $
*/
#ifndef _RESOLV_H_
#define _RESOLV_H_
#include <sys/param.h>
#include <sys/types.h>
#include <sys/cdefs.h>
#include <stdio.h>
#include <netinet/in.h> /* struct in_addr */
/*%
* 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
* 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;
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);
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 */
struct __res_state {
int retrans; /*%< retransmission 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 */
};
typedef struct __res_state *res_state;
/*%
* 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 */
#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
__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_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);
__END_DECLS
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 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 fp_resstat __fp_resstat
#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 putlong __putlong
#define putshort __putshort
#define res_dnok __res_dnok
#define res_hnok __res_hnok
#define res_mailok __res_mailok
#define res_nameinquery __res_nameinquery
#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_send_setqhook __res_send_setqhook
#define res_send_setrhook __res_send_setrhook
#define res_mkupdate __res_mkupdate
#define res_mkupdrec __res_mkupdrec
#define res_freeupdrec __res_freeupdrec
__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 fp_resstat(struct __res_state *, FILE *);
void putlong(u_int32_t, u_char *);
void putshort(u_int16_t, u_char *);
const char * p_class(int);
const char * p_time(u_int32_t);
const char * p_type(int);
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);
void res_send_setqhook(res_send_qhook);
void res_send_setrhook(res_send_rhook);
/* XXX The following depend on the ns_updrec typedef in arpa/nameser.h */
#ifdef _ARPA_NAMESER_H_
int res_update (ns_updrec *);
int res_mkupdate (ns_updrec *, u_char *, int);
ns_updrec * res_mkupdrec (int, const char *, u_int, u_int, u_long);
void res_freeupdrec (ns_updrec *);
#endif
__END_DECLS
#endif /* !_RESOLV_H_ */
