/* MIT License
 *
 * Copyright (c) Massachusetts Institute of Technology
 * Copyright (c) Daniel Stenberg
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * SPDX-License-Identifier: MIT
 */

#ifndef ARES_NAMESER_H
#define ARES_NAMESER_H

#include "ares_build.h"

#ifdef CARES_HAVE_ARPA_NAMESER_H
#  include <arpa/nameser.h>
#endif
#ifdef CARES_HAVE_ARPA_NAMESER_COMPAT_H
#  include <arpa/nameser_compat.h>
#endif

/* ============================================================================
 * arpa/nameser.h may or may not provide ALL of the below defines, so check
 * each one individually and set if not
 * ============================================================================
 */

#ifndef NS_PACKETSZ
#  define NS_PACKETSZ     512   /* maximum packet size */
#endif

#ifndef NS_MAXDNAME
#  define NS_MAXDNAME     256   /* maximum domain name */
#endif

#ifndef NS_MAXCDNAME
#  define NS_MAXCDNAME    255   /* maximum compressed domain name */
#endif

#ifndef NS_MAXLABEL
#  define NS_MAXLABEL     63
#endif

#ifndef NS_HFIXEDSZ
#  define NS_HFIXEDSZ     12    /* #/bytes of fixed data in header */
#endif

#ifndef NS_QFIXEDSZ
#  define NS_QFIXEDSZ     4     /* #/bytes of fixed data in query */
#endif

#ifndef NS_RRFIXEDSZ
#  define NS_RRFIXEDSZ    10    /* #/bytes of fixed data in r record */
#endif

#ifndef NS_INT16SZ
#  define NS_INT16SZ      2
#endif

#ifndef NS_INADDRSZ
#  define NS_INADDRSZ     4
#endif

#ifndef NS_IN6ADDRSZ
#  define NS_IN6ADDRSZ    16
#endif

#ifndef NS_CMPRSFLGS
#  define NS_CMPRSFLGS    0xc0  /* Flag bits indicating name compression. */
#endif

#ifndef NS_DEFAULTPORT
#  define NS_DEFAULTPORT  53    /* For both TCP and UDP. */
#endif

/* ============================================================================
 * arpa/nameser.h should provide these enumerations always, so if not found,
 * provide them
 * ============================================================================
 */
#ifndef CARES_HAVE_ARPA_NAMESER_H

typedef enum __ns_class {
    ns_c_invalid = 0,       /* Cookie. */
    ns_c_in = 1,            /* Internet. */
    ns_c_2 = 2,             /* unallocated/unsupported. */
    ns_c_chaos = 3,         /* MIT Chaos-net. */
    ns_c_hs = 4,            /* MIT Hesiod. */
    /* Query class values which do not appear in resource records */
    ns_c_none = 254,        /* for prereq. sections in update requests */
    ns_c_any = 255,         /* Wildcard match. */
    ns_c_max = 65536
} ns_class;

typedef enum __ns_type {
    ns_t_invalid = 0,       /* Cookie. */
    ns_t_a = 1,             /* Host address. */
    ns_t_ns = 2,            /* Authoritative server. */
    ns_t_md = 3,            /* Mail destination. */
    ns_t_mf = 4,            /* Mail forwarder. */
    ns_t_cname = 5,         /* Canonical name. */
    ns_t_soa = 6,           /* Start of authority zone. */
    ns_t_mb = 7,            /* Mailbox domain name. */
    ns_t_mg = 8,            /* Mail group member. */
    ns_t_mr = 9,            /* Mail rename name. */
    ns_t_null = 10,         /* Null resource record. */
    ns_t_wks = 11,          /* Well known service. */
    ns_t_ptr = 12,          /* Domain name pointer. */
    ns_t_hinfo = 13,        /* Host information. */
    ns_t_minfo = 14,        /* Mailbox information. */
    ns_t_mx = 15,           /* Mail routing information. */
    ns_t_txt = 16,          /* Text strings. */
    ns_t_rp = 17,           /* Responsible person. */
    ns_t_afsdb = 18,        /* AFS cell database. */
    ns_t_x25 = 19,          /* X_25 calling address. */
    ns_t_isdn = 20,         /* ISDN calling address. */
    ns_t_rt = 21,           /* Router. */
    ns_t_nsap = 22,         /* NSAP address. */
    ns_t_nsap_ptr = 23,     /* Reverse NSAP lookup (deprecated). */
    ns_t_sig = 24,          /* Security signature. */
    ns_t_key = 25,          /* Security key. */
    ns_t_px = 26,           /* X.400 mail mapping. */
    ns_t_gpos = 27,         /* Geographical position (withdrawn). */
    ns_t_aaaa = 28,         /* Ip6 Address. */
    ns_t_loc = 29,          /* Location Information. */
    ns_t_nxt = 30,          /* Next domain (security). */
    ns_t_eid = 31,          /* Endpoint identifier. */
    ns_t_nimloc = 32,       /* Nimrod Locator. */
    ns_t_srv = 33,          /* Server Selection. */
    ns_t_atma = 34,         /* ATM Address */
    ns_t_naptr = 35,        /* Naming Authority PoinTeR */
    ns_t_kx = 36,           /* Key Exchange */
    ns_t_cert = 37,         /* Certification record */
    ns_t_a6 = 38,           /* IPv6 address (deprecates AAAA) */
    ns_t_dname = 39,        /* Non-terminal DNAME (for IPv6) */
    ns_t_sink = 40,         /* Kitchen sink (experimentatl) */
    ns_t_opt = 41,          /* EDNS0 option (meta-RR) */
    ns_t_apl = 42,          /* Address prefix list (RFC3123) */
    ns_t_ds = 43,           /* Delegation Signer (RFC4034) */
    ns_t_sshfp = 44,        /* SSH Key Fingerprint (RFC4255) */
    ns_t_rrsig = 46,        /* Resource Record Signature (RFC4034) */
    ns_t_nsec = 47,         /* Next Secure (RFC4034) */
    ns_t_dnskey = 48,       /* DNS Public Key (RFC4034) */
    ns_t_tkey = 249,        /* Transaction key */
    ns_t_tsig = 250,        /* Transaction signature. */
    ns_t_ixfr = 251,        /* Incremental zone transfer. */
    ns_t_axfr = 252,        /* Transfer zone of authority. */
    ns_t_mailb = 253,       /* Transfer mailbox records. */
    ns_t_maila = 254,       /* Transfer mail agent records. */
    ns_t_any = 255,         /* Wildcard match. */
    ns_t_uri = 256,         /* Uniform Resource Identifier (RFC7553) */
    ns_t_caa = 257,         /* Certification Authority Authorization. */
    ns_t_max = 65536
} ns_type;

typedef enum __ns_opcode {
    ns_o_query = 0,         /* Standard query. */
    ns_o_iquery = 1,        /* Inverse query (deprecated/unsupported). */
    ns_o_status = 2,        /* Name server status query (unsupported). */
                                /* Opcode 3 is undefined/reserved. */
    ns_o_notify = 4,        /* Zone change notification. */
    ns_o_update = 5,        /* Zone update message. */
    ns_o_max = 6
} ns_opcode;

typedef enum __ns_rcode {
    ns_r_noerror = 0,       /* No error occurred. */
    ns_r_formerr = 1,       /* Format error. */
    ns_r_servfail = 2,      /* Server failure. */
    ns_r_nxdomain = 3,      /* Name error. */
    ns_r_notimpl = 4,       /* Unimplemented. */
    ns_r_refused = 5,       /* Operation refused. */
    /* these are for BIND_UPDATE */
    ns_r_yxdomain = 6,      /* Name exists */
    ns_r_yxrrset = 7,       /* RRset exists */
    ns_r_nxrrset = 8,       /* RRset does not exist */
    ns_r_notauth = 9,       /* Not authoritative for zone */
    ns_r_notzone = 10,      /* Zone of record different from zone section */
    ns_r_max = 11,
    /* The following are TSIG extended errors */
    ns_r_badsig = 16,
    ns_r_badkey = 17,
    ns_r_badtime = 18
} ns_rcode;

#endif /* CARES_HAVE_ARPA_NAMESER_H */


/* ============================================================================
 * arpa/nameser_compat.h typically sets these.  However on some systems
 * arpa/nameser.h does, but may not set all of them.  Lets conditionally
 * define each
 * ============================================================================
 */

#ifndef PACKETSZ
#  define PACKETSZ         NS_PACKETSZ
#endif

#ifndef MAXDNAME
#  define MAXDNAME         NS_MAXDNAME
#endif

#ifndef MAXCDNAME
#  define MAXCDNAME        NS_MAXCDNAME
#endif

#ifndef MAXLABEL
#  define MAXLABEL         NS_MAXLABEL
#endif

#ifndef HFIXEDSZ
#  define HFIXEDSZ         NS_HFIXEDSZ
#endif

#ifndef QFIXEDSZ
#  define QFIXEDSZ         NS_QFIXEDSZ
#endif

#ifndef RRFIXEDSZ
#  define RRFIXEDSZ        NS_RRFIXEDSZ
#endif

#ifndef INDIR_MASK
#  define INDIR_MASK       NS_CMPRSFLGS
#endif

#ifndef NAMESERVER_PORT
#  define NAMESERVER_PORT  NS_DEFAULTPORT
#endif


/* opcodes */
#ifndef O_QUERY
#  define O_QUERY 0  /* ns_o_query */
#endif
#ifndef O_IQUERY
#  define O_IQUERY 1 /* ns_o_iquery */
#endif
#ifndef O_STATUS
#  define O_STATUS 2 /* ns_o_status */
#endif
#ifndef O_NOTIFY
#  define O_NOTIFY 4 /* ns_o_notify */
#endif
#ifndef O_UPDATE
#  define O_UPDATE 5 /* ns_o_update */
#endif


/* response codes */
#ifndef SERVFAIL
#  define SERVFAIL        ns_r_servfail
#endif
#ifndef NOTIMP
#  define NOTIMP          ns_r_notimpl
#endif
#ifndef REFUSED
#  define REFUSED         ns_r_refused
#endif
#if defined(_WIN32) && !defined(HAVE_ARPA_NAMESER_COMPAT_H) && defined(NOERROR)
#  undef NOERROR /* it seems this is already defined in winerror.h */
#endif
#ifndef NOERROR
#  define NOERROR         ns_r_noerror
#endif
#ifndef FORMERR
#  define FORMERR         ns_r_formerr
#endif
#ifndef NXDOMAIN
#  define NXDOMAIN        ns_r_nxdomain
#endif
/* Non-standard response codes, use numeric values */
#ifndef YXDOMAIN
#  define YXDOMAIN        6 /* ns_r_yxdomain */
#endif
#ifndef YXRRSET
#  define YXRRSET         7 /* ns_r_yxrrset */
#endif
#ifndef NXRRSET
#  define NXRRSET         8 /* ns_r_nxrrset */
#endif
#ifndef NOTAUTH
#  define NOTAUTH         9 /* ns_r_notauth */
#endif
#ifndef NOTZONE
#  define NOTZONE         10 /* ns_r_notzone */
#endif
#ifndef TSIG_BADSIG
#  define TSIG_BADSIG     16 /* ns_r_badsig */
#endif
#ifndef TSIG_BADKEY
#  define TSIG_BADKEY     17 /* ns_r_badkey */
#endif
#ifndef TSIG_BADTIME
#  define TSIG_BADTIME    18 /* ns_r_badtime */
#endif


/* classes */
#ifndef C_IN
#  define C_IN            1 /* ns_c_in */
#endif
#ifndef C_CHAOS
#  define C_CHAOS         3 /* ns_c_chaos */
#endif
#ifndef C_HS
#  define C_HS            4 /* ns_c_hs */
#endif
#ifndef C_NONE
#  define C_NONE          254 /* ns_c_none */
#endif
#ifndef C_ANY
#  define C_ANY           255 /*  ns_c_any */
#endif


/* types */
#ifndef T_A
#  define T_A             1   /* ns_t_a */
#endif
#ifndef T_NS
#  define T_NS            2   /* ns_t_ns */
#endif
#ifndef T_MD
#  define T_MD            3   /* ns_t_md */
#endif
#ifndef T_MF
#  define T_MF            4   /* ns_t_mf */
#endif
#ifndef T_CNAME
#  define T_CNAME         5   /* ns_t_cname */
#endif
#ifndef T_SOA
#  define T_SOA           6   /* ns_t_soa */
#endif
#ifndef T_MB
#  define T_MB            7   /* ns_t_mb */
#endif
#ifndef T_MG
#  define T_MG            8   /* ns_t_mg */
#endif
#ifndef T_MR
#  define T_MR            9   /* ns_t_mr */
#endif
#ifndef T_NULL
#  define T_NULL          10  /* ns_t_null */
#endif
#ifndef T_WKS
#  define T_WKS           11  /* ns_t_wks */
#endif
#ifndef T_PTR
#  define T_PTR           12  /* ns_t_ptr */
#endif
#ifndef T_HINFO
#  define T_HINFO         13  /* ns_t_hinfo */
#endif
#ifndef T_MINFO
#  define T_MINFO         14  /* ns_t_minfo */
#endif
#ifndef T_MX
#  define T_MX            15  /* ns_t_mx */
#endif
#ifndef T_TXT
#  define T_TXT           16  /* ns_t_txt */
#endif
#ifndef T_RP
#  define T_RP            17  /* ns_t_rp */
#endif
#ifndef T_AFSDB
#  define T_AFSDB         18  /* ns_t_afsdb */
#endif
#ifndef T_X25
#  define T_X25           19  /* ns_t_x25 */
#endif
#ifndef T_ISDN
#  define T_ISDN          20  /* ns_t_isdn */
#endif
#ifndef T_RT
#  define T_RT            21  /* ns_t_rt */
#endif
#ifndef T_NSAP
#  define T_NSAP          22  /* ns_t_nsap */
#endif
#ifndef T_NSAP_PTR
#  define T_NSAP_PTR      23  /* ns_t_nsap_ptr */
#endif
#ifndef T_SIG
#  define T_SIG           24  /* ns_t_sig */
#endif
#ifndef T_KEY
#  define T_KEY           25  /* ns_t_key */
#endif
#ifndef T_PX
#  define T_PX            26  /* ns_t_px */
#endif
#ifndef T_GPOS
#  define T_GPOS          27  /* ns_t_gpos */
#endif
#ifndef T_AAAA
#  define T_AAAA          28  /* ns_t_aaaa */
#endif
#ifndef T_LOC
#  define T_LOC           29  /* ns_t_loc */
#endif
#ifndef T_NXT
#  define T_NXT           30  /* ns_t_nxt */
#endif
#ifndef T_EID
#  define T_EID           31  /* ns_t_eid */
#endif
#ifndef T_NIMLOC
#  define T_NIMLOC        32  /* ns_t_nimloc */
#endif
#ifndef T_SRV
#  define T_SRV           33  /* ns_t_srv */
#endif
#ifndef T_ATMA
#  define T_ATMA          34  /* ns_t_atma */
#endif
#ifndef T_NAPTR
#  define T_NAPTR         35  /* ns_t_naptr */
#endif
#ifndef T_KX
#  define T_KX            36  /* ns_t_kx */
#endif
#ifndef T_CERT
#  define T_CERT          37  /* ns_t_cert */
#endif
#ifndef T_A6
#  define T_A6            38  /* ns_t_a6 */
#endif
#ifndef T_DNAME
#  define T_DNAME         39  /* ns_t_dname */
#endif
#ifndef T_SINK
#  define T_SINK          40  /* ns_t_sink */
#endif
#ifndef T_OPT
#  define T_OPT           41  /* ns_t_opt */
#endif
#ifndef T_APL
#  define T_APL           42  /* ns_t_apl */
#endif
#ifndef T_DS
#  define T_DS            43  /* ns_t_ds */
#endif
#ifndef T_SSHFP
#  define T_SSHFP         44  /* ns_t_sshfp */
#endif
#ifndef T_RRSIG
#  define T_RRSIG         46  /* ns_t_rrsig */
#endif
#ifndef T_NSEC
#  define T_NSEC          47  /* ns_t_nsec */
#endif
#ifndef T_DNSKEY
#  define T_DNSKEY        48  /* ns_t_dnskey */
#endif
#ifndef T_TKEY
#  define T_TKEY          249 /* ns_t_tkey */
#endif
#ifndef T_TSIG
#  define T_TSIG          250 /* ns_t_tsig */
#endif
#ifndef T_IXFR
#  define T_IXFR          251 /* ns_t_ixfr */
#endif
#ifndef T_AXFR
#  define T_AXFR          252 /* ns_t_axfr */
#endif
#ifndef T_MAILB
#  define T_MAILB         253 /* ns_t_mailb */
#endif
#ifndef T_MAILA
#  define T_MAILA         254 /* ns_t_maila */
#endif
#ifndef T_ANY
#  define T_ANY           255 /* ns_t_any */
#endif
#ifndef T_URI
#  define T_URI          256 /* ns_t_uri */
#endif
#ifndef T_CAA
#  define T_CAA           257 /* ns_t_caa */
#endif
#ifndef T_MAX
#  define T_MAX         65536 /* ns_t_max */
#endif


#endif /* ARES_NAMESER_H */
