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/*-

 * 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 $

 * $FreeBSD: src/include/resolv.h,v 1.21 2002/03/23 17:24:53 imp Exp $

 */

#ifndef _RESOLV_H_

#define _RESOLV_H_

#include <sys/param.h>

#include <sys/types.h>

#include <sys/cdefs.h>

#include <sys/socket.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

/*

 * 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 */

#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. */

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_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];

        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 */

        union {

                char    pad[52];        /* On an i386 this means 512b total. */

                struct {

                        u_int16_t               nscount;

                        u_int16_t               nsmap[MAXNS];

                        int                     nssocks[MAXNS];

                        u_int16_t               nscount6;

                        u_int16_t               nsinit;

                        struct sockaddr_in6     *nsaddrs[MAXNS];

                        unsigned long long int  initstamp

                          __attribute__((packed));

#if 0

                        unsigned int            _initstamp[2];

#endif

                } _ext;

        } _u;

};

typedef struct __res_state *res_state;

/* for INET6 */

/*

 * replacement of __res_state, separated to keep binary compatibility.

 */

struct __res_state_ext {

        struct sockaddr_storage nsaddr_list[MAXNS];

        struct {

                int     af;             /* address family for addr, mask */

                union {

                        struct  in_addr ina;

                        struct  in6_addr in6a;

                } addr, mask;

        } sort_list[MAXRESOLVSORT];

};

/*

 *  * 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 */

/* res_findzonecut() options */

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

/*

 * 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_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_USEBSTRING  0x00040000      /* IPv6 reverse lookup with byte

                                           strings */

#define RES_NOIP6DOTINT 0x00080000      /* Do not use .ip6.int in IPv6

                                           reverse lookup */

#define RES_DEFAULT     (RES_RECURSE|RES_DEFNAMES|RES_DNSRCH|RES_NOIP6DOTINT)

/*

 * 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 RES_SET_H_ERRNO(r,x)                    \

  do                                            \

    {                                           \

      (r)->res_h_errno = x;                     \

      h_errno = (x);                            \

    }                                           \

  while (0)

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;

/* for INET6 */

extern struct __res_state_ext _res_ext;

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_hostalias   __res_hostalias

#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

#define p_query         __p_query

#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_rcode         __p_rcode

#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

#define p_cdname        __p_cdname

#define p_fqnname       __p_fqnname

#define p_fqname        __p_fqname

#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

#define res_init        __res_init

#define res_randomid    __res_randomid

#define res_query       __res_query

#define res_search      __res_search

#define res_querydomain __res_querydomain

#define res_mkquery     __res_mkquery

#define res_send        __res_send

#define res_isourserver __res_isourserver

#define res_nameinquery __res_nameinquery

#define res_nclose              __res_nclose

#define res_ninit               __res_ninit

#define res_nmkquery            __res_nmkquery

#define res_npquery             __res_npquery

#define res_nquery              __res_nquery

#define res_nquerydomain        __res_nquerydomain

#define res_nsearch             __res_nsearch

#define res_nsend               __res_nsend

#define res_nisourserver        __res_nisourserver

#define res_queriesmatch __res_queriesmatch

#define res_close       __res_close

#define res_opt         __res_opt

#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            fp_query(const u_char *, FILE *);

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

const char *    hostalias(const char *);

void            putlong(u_int32_t, u_char *);

void            putshort(u_int16_t, u_char *);

const char *    p_class(int);

const char *    p_rcode (int);

const char *    p_time(u_int32_t);

const char *    p_type(int);

void            p_query(const u_char *);

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);

int             res_init(void);

u_int           res_randomid(void);

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

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

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

                                u_char *, int);

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

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

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

int             res_isourserver(const struct sockaddr_in *);

int             res_nameinquery(const char *, int, int,

                                const u_char *, const u_char *);

void            res_npquery (const res_state, const u_char *, int, FILE *);

const char *    res_hostalias (const res_state, const char *, char *, size_t);

int             res_nquery (res_state, const char *, int, int, u_char *, int);

int             res_nsearch (res_state, const char *, int, int, u_char *, int);

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

                                  int, u_char *, int);

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

                              const u_char *, int, const u_char *, u_char *,

                              int);

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

void            res_nclose (res_state);

int             res_queriesmatch(const u_char *, const u_char *,

                                 const u_char *, const u_char *);

void            res_close(void);

int             res_opt(int, u_char *, int, int);

const char *    p_section(int, int);

/* 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_ */