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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 $

 */

#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_ */