/*
 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
 *
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T
 * All Rights Reserved
 *
 * Portions of this source code were derived from Berkeley
 * 4.3 BSD under license from the regents of the University of
 * California.
 */

/*
 * BIND 4.9.4:
 */

/*
 * 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--
 *
 * End BIND 4.9.4
 */

/*
 * 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. 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) 1996-1999 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 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
 *      $Id: resolv.h,v 8.52 2003/04/29 02:27:03 marka Exp $
 */

#ifndef _RESOLV_H_
#define _RESOLV_H_

#include <sys/param.h>

#include <stdio.h>
#include <arpa/nameser.h>
#include <sys/socket.h>

#ifdef  __cplusplus
extern "C" {
#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   20090302

#define RES_SET_H_ERRNO(r, x)   __h_errno_set(r, x)
struct __res_state;                                     /* forward */

void __h_errno_set(struct __res_state *res, int err);

/*
 * 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

#ifndef __P
#define __P(x)  x
#endif

typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
        res_sendhookact;

typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr * const *ns,
                                                const uchar_t **query,
                                                int *querylen,
                                                uchar_t *ans,
                                                int anssiz,
                                                int *resplen));

typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr *ns,
                                                const uchar_t *query,
                                                int querylen,
                                                uchar_t *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.
 */
/* ADDRSORT and MAXADDR retained for compatibility; not used */
#define ADDRSORT        1       /* enable the address-sorting option */
#define MAXADDR         10      /* max # addresses to sort by */

#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. */

struct __res_state_ext;

struct __res_state {
        int     retrans;                /* retransmission time interval */
        int     retry;                  /* number of times to retransmit */
#ifdef __sun
        uint_t  options;                /* option flags - see below. */
#else
        ulong_t options;                /* option flags - see below. */
#endif
        int     nscount;                /* number of name servers */
        struct sockaddr_in
                nsaddr_list[MAXNS];     /* address of name server */
#define nsaddr  nsaddr_list[0]          /* for backward compatibility */
        ushort_t id;                    /* current packet id */
        char    *dnsrch[MAXDNSRCH+1];   /* components of domain to search */
        char    defdname[256];          /* default domain (deprecated) */
#ifdef __sun
        uint_t  pfcode;                 /* RES_PRF_ flags - see below. */
#else
        ulong_t pfcode;                 /* RES_PRF_ flags - see below. */
#endif
        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;
                unsigned int    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 */
        uint_t  _flags;         /* PRIVATE: see below */
        uint_t  _pad;                   /* make _u 64 bit aligned */
        union {
                /* On an 32-bit arch this means 512b total. */
                char    pad[72 - 4*sizeof (int) - 2*sizeof (void *)];
                struct {
                        uint16_t                nscount;
                        uint16_t                nstimes[MAXNS]; /* ms. */
                        int                     nssocks[MAXNS];
                        struct __res_state_ext *ext;    /* extention for IPv6 */
                        uchar_t _rnd[16];       /* PRIVATE: random state */
                } _ext;
        } _u;
};

typedef struct __res_state      *res_state;

union res_sockaddr_union {
        struct sockaddr_in      sin;
#ifdef IN6ADDR_ANY_INIT
        struct sockaddr_in6     sin6;
#endif
#ifdef ISC_ALIGN64
        int64_t                 __align64;      /* 64bit alignment */
#else
        int32_t                 __align32;      /* 32bit alignment */
#endif
        char                    __space[128];   /* max size */
};

/*
 * 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 */
#define RES_F_EDNS0ERR  0x00000004      /* EDNS0 caused errors */
#define RES_F__UNUSED   0x00000008      /* (unused) */
#define RES_F_LASTMASK  0x000000F0      /* ordinal server of last res_nsend */
#define RES_F_LASTSHIFT 4               /* bit position of LASTMASK "flag" */
#define RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT)

/* res_findzonecut2() options */
#define RES_EXHAUSTIVE  0x00000001      /* always do all queries */
#define RES_IPV4ONLY    0x00000002      /* IPv4 only */
#define RES_IPV6ONLY    0x00000004      /* IPv6 only */

/*
 * 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 trucation 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_NO_NIBBLE   0x00040000      /* disable IPv6 nibble mode reverse */
#define RES_NO_BITSTRING 0x00080000     /* disable IPv6 bitstring mode revrse */
#define RES_NOTLDQUERY  0x00100000      /* don't unqualified name as a tld */
#define RES_USE_DNSSEC  0x00200000      /* use DNSSEC using OK bit in OPT */
/* KAME extensions: use higher bit to avoid conflict with ISC use */
#define RES_USE_DNAME   0x10000000      /* use DNAME */
#define RES_USE_EDNS0   0x40000000      /* use EDNS0 if configured */
#define RES_NO_NIBBLE2  0x80000000      /* disable alternate nibble lookup */

#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
#define RES_PRF_TRUNC   0x00008000
/*                      0x00010000      */

/* Things involving an internal (static) resolver context. */
#ifdef _REENTRANT
extern struct __res_state *__res_state(void);
#define _res (*__res_state())
#else
#ifndef __BIND_NOSTATIC
extern struct __res_state _res;
#endif
#endif

#ifndef __BIND_NOSTATIC
void            fp_nquery __P((const uchar_t *, int, FILE *));
void            fp_query __P((const uchar_t *, FILE *));
const char *hostalias __P((const char *));
void            p_query __P((const uchar_t *));
void            res_close __P((void));
int             res_init __P((void));
int             res_isourserver __P((const struct sockaddr_in *));
int             res_mkquery __P((int, const char *, int, int, const uchar_t *,
                                int, const uchar_t *, uchar_t *, int));
int             res_query       __P((const char *, int, int, uchar_t *, int));
int             res_querydomain __P((const char *, const char *, int, int,
                                uchar_t *, int));
int             res_search __P((const char *, int, int, uchar_t *, int));
int             res_send __P((const uchar_t *, int, uchar_t *, int));
int             res_sendsigned __P((const uchar_t *, int, ns_tsig_key *,
                                    uchar_t *, int));
#endif  /* __BIND_NOSTATIC */

extern const struct res_sym __p_key_syms[];
extern const struct res_sym __p_cert_syms[];
extern const struct res_sym __p_class_syms[];
extern const struct res_sym __p_type_syms[];
extern const struct res_sym __p_rcode_syms[];

int             res_hnok __P((const char *));
int             res_ownok __P((const char *));
int             res_mailok __P((const char *));
int             res_dnok __P((const char *));
int             sym_ston __P((const struct res_sym *, const char *, int *));
const char      *sym_ntos __P((const struct res_sym *, int, int *));
const char      *sym_ntop __P((const struct res_sym *, int, int *));
int             b64_ntop __P((uchar_t const *, size_t, char *, size_t));
int             b64_pton __P((char const *, uchar_t *, size_t));
int             loc_aton __P((const char *ascii, uchar_t *binary));
const char      *loc_ntoa __P((const uchar_t *binary, char *ascii));
int             dn_skipname __P((const uchar_t *, const uchar_t *));
void            putlong __P((unsigned int, uchar_t *));
void            putshort __P((unsigned short, uchar_t *));
const char      *p_class __P((int));
const char      *p_time __P((unsigned int));
const char      *p_type __P((int));
const char      *p_rcode __P((int));
const char      *p_sockun __P((union res_sockaddr_union, char *, size_t));
const uchar_t   *p_cdnname __P((const uchar_t *, const uchar_t *, int,
                        FILE *));
const uchar_t   *p_cdname __P((const uchar_t *, const uchar_t *, FILE *));
const uchar_t   *p_fqnname __P((const uchar_t *cp, const uchar_t *msg,
                        int, char *, int));
const uchar_t   *p_fqname __P((const uchar_t *, const uchar_t *, FILE *));
const char      *p_option __P((uint_t option));
char            *p_secstodate __P((uint_t));
int             dn_count_labels __P((const char *));
int             dn_comp __P((const char *, uchar_t *, int,
                                uchar_t **, uchar_t **));
int             dn_expand __P((const uchar_t *, const uchar_t *,
                        const uchar_t *, char *, int));
void            res_rndinit __P((res_state));
uint_t          res_randomid __P((void));
uint_t          res_nrandomid __P((res_state));
int             res_nameinquery __P((const char *, int, int,
                                const uchar_t *, const uchar_t *));
int             res_queriesmatch __P((const uchar_t *, const uchar_t *,
                                const uchar_t *, const uchar_t *));
const char      *p_section __P((int section, int opcode));


/* Things involving a resolver context. */
int             res_ninit __P((res_state));
int             res_nisourserver __P((const res_state,
                                const struct sockaddr_in *));
void    fp_resstat __P((const res_state, FILE *));
void    res_pquery      __P((const res_state, const uchar_t *, int, FILE *));
const char      *res_hostalias __P((const res_state, const char *,
                                char *, size_t));
int             res_nquery __P((res_state,
                                const char *, int, int, uchar_t *, int));
int             res_nsearch __P((res_state, const char *, int,
                                int, uchar_t *, int));
int             res_nquerydomain __P((res_state,
                                const char *, const char *, int, int,
                                uchar_t *, int));
int             res_nmkquery __P((res_state,
                                int, const char *, int, int, const uchar_t *,
                                int, const uchar_t *, uchar_t *, int));
int             res_nsend __P((res_state, const uchar_t *, int, uchar_t *,
                                int));
int             res_nsendsigned __P((res_state, const uchar_t *, int,
                                ns_tsig_key *, uchar_t *, int));
int             res_findzonecut __P((res_state, const char *, ns_class, int,
                                char *, size_t, struct in_addr *, int));
int             res_findzonecut2 __P((res_state, const char *, ns_class, int,
                                char *, size_t, union res_sockaddr_union *,
                                int));
void            res_nclose __P((res_state));
int             res_nopt __P((res_state, int, uchar_t *, int, int));
int             res_nopt_rdata __P((res_state, int, uchar_t *, int, uchar_t *,
                                    ushort_t, ushort_t, uchar_t *));
void            res_send_setqhook __P((res_send_qhook hook));
void            res_send_setrhook __P((res_send_rhook hook));
int             __res_vinit __P((res_state, int));
void            res_destroyservicelist __P((void));
const char      *res_servicename __P((uint16_t port, const char *proto));
const char      *res_protocolname __P((int num));
void            res_destroyprotolist __P((void));
void            res_buildprotolist __P((void));
const char      *res_get_nibblesuffix __P((res_state));
const char      *res_get_nibblesuffix2 __P((res_state));
void            res_ndestroy __P((res_state));
uint16_t        res_nametoclass __P((const char *buf, int *success));
uint16_t        res_nametotype __P((const char *buf, int *success));
void            res_setservers __P((res_state,
                                    const union res_sockaddr_union *, int));
int             res_getservers __P((res_state,
                                    union res_sockaddr_union *, int));


#ifdef  __cplusplus
}
#endif

#endif /* !_RESOLV_H_ */