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/*
* Copyright (c) 1983, 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.
* 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.
*/
/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* 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.
*/
#ifndef _ARPA_NAMESER_H_
#define _ARPA_NAMESER_H_
#include <sys/param.h>
#include <sys/types.h>
#include <stdint.h>
/*
* Define constants based on RFC 883, RFC 1034, RFC 1035
*/
#define NS_PACKETSZ 512 /*%< default UDP packet size */
#define NS_MAXDNAME 1025 /*%< maximum domain name */
#define NS_MAXMSG 65535 /*%< maximum message size */
#define NS_MAXCDNAME 255 /*%< maximum compressed domain name */
#define NS_MAXLABEL 63 /*%< maximum length of domain label */
#define NS_HFIXEDSZ 12 /*%< #/bytes of fixed data in header */
#define NS_QFIXEDSZ 4 /*%< #/bytes of fixed data in query */
#define NS_RRFIXEDSZ 10 /*%< #/bytes of fixed data in r record */
#define NS_INT32SZ 4 /*%< #/bytes of data in a uint32_t */
#define NS_INT16SZ 2 /*%< #/bytes of data in a uint16_t */
#define NS_INT8SZ 1 /*%< #/bytes of data in a uint8_t */
#define NS_INADDRSZ 4 /*%< IPv4 T_A */
#define NS_IN6ADDRSZ 16 /*%< IPv6 T_AAAA */
#define NS_CMPRSFLGS 0xc0 /*%< Flag bits indicating name compression. */
#define NS_DEFAULTPORT 53 /*%< For both TCP and UDP. */
/*
* These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
* in synch with it.
*/
typedef enum __ns_sect {
ns_s_qd = 0, /*%< Query: Question. */
ns_s_zn = 0, /*%< Update: Zone. */
ns_s_an = 1, /*%< Query: Answer. */
ns_s_pr = 1, /*%< Update: Prerequisites. */
ns_s_ns = 2, /*%< Query: Name servers. */
ns_s_ud = 2, /*%< Update: Update. */
ns_s_ar = 3, /*%< Query|Update: Additional records. */
ns_s_max = 4
} ns_sect;
/*%
* This is a message handle. It is caller allocated and has no dynamic data.
* This structure is intended to be opaque to all but ns_parse.c, thus the
* leading _'s on the member names. Use the accessor functions, not the _'s.
*/
typedef struct __ns_msg {
const unsigned char *_msg, *_eom;
uint16_t _id, _flags, _counts[ns_s_max];
const unsigned char *_sections[ns_s_max];
ns_sect _sect;
int _rrnum;
const unsigned char *_msg_ptr;
} ns_msg;
/* Private data structure - do not use from outside library. */
struct _ns_flagdata { int mask, shift; };
extern const struct _ns_flagdata _ns_flagdata[];
/* Accessor macros - this is part of the public interface. */
#define ns_msg_id(handle) ((handle)._id + 0)
#define ns_msg_base(handle) ((handle)._msg + 0)
#define ns_msg_end(handle) ((handle)._eom + 0)
#define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
#define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
/*%
* This is a parsed record. It is caller allocated and has no dynamic data.
*/
typedef struct __ns_rr {
char name[NS_MAXDNAME];
uint16_t type;
uint16_t rr_class;
uint32_t ttl;
uint16_t rdlength;
const unsigned char * rdata;
} ns_rr;
/* Accessor macros - this is part of the public interface. */
#define ns_rr_name(rr) (((rr).name[0] != '\0') ? (rr).name : ".")
#define ns_rr_type(rr) ((ns_type)((rr).type + 0))
#define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
#define ns_rr_ttl(rr) ((rr).ttl + 0)
#define ns_rr_rdlen(rr) ((rr).rdlength + 0)
#define ns_rr_rdata(rr) ((rr).rdata + 0)
/*%
* These don't have to be in the same order as in the packet flags word,
* and they can even overlap in some cases, but they will need to be kept
* in synch with ns_parse.c:ns_flagdata[].
*/
typedef enum __ns_flag {
ns_f_qr, /*%< Question/Response. */
ns_f_opcode, /*%< Operation code. */
ns_f_aa, /*%< Authoritative Answer. */
ns_f_tc, /*%< Truncation occurred. */
ns_f_rd, /*%< Recursion Desired. */
ns_f_ra, /*%< Recursion Available. */
ns_f_z, /*%< MBZ. */
ns_f_ad, /*%< Authentic Data (DNSSEC). */
ns_f_cd, /*%< Checking Disabled (DNSSEC). */
ns_f_rcode, /*%< Response code. */
ns_f_max
} ns_flag;
/*%
* Currently defined opcodes.
*/
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;
/*%
* Currently defined response codes.
*/
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 EDNS extended rcodes */
ns_r_badvers = 16,
/* The following are TSIG errors */
ns_r_badsig = 16,
ns_r_badkey = 17,
ns_r_badtime = 18
} ns_rcode;
/* BIND_UPDATE */
typedef enum __ns_update_operation {
ns_uop_delete = 0,
ns_uop_add = 1,
ns_uop_max = 2
} ns_update_operation;
/*%
* This structure is used for TSIG authenticated messages
*/
struct ns_tsig_key {
char name[NS_MAXDNAME], alg[NS_MAXDNAME];
unsigned char *data;
int len;
};
typedef struct ns_tsig_key ns_tsig_key;
/*%
* This structure is used for TSIG authenticated TCP messages
*/
struct ns_tcp_tsig_state {
int counter;
struct dst_key *key;
void *ctx;
unsigned char sig[NS_PACKETSZ];
int siglen;
};
typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
#define NS_TSIG_FUDGE 300
#define NS_TSIG_TCP_COUNT 100
#define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
#define NS_TSIG_ERROR_NO_TSIG -10
#define NS_TSIG_ERROR_NO_SPACE -11
#define NS_TSIG_ERROR_FORMERR -12
/*%
* Currently defined type values for resources and queries.
*/
typedef enum __ns_type
{
ns_t_invalid = 0,
ns_t_a = 1,
ns_t_ns = 2,
ns_t_md = 3,
ns_t_mf = 4,
ns_t_cname = 5,
ns_t_soa = 6,
ns_t_mb = 7,
ns_t_mg = 8,
ns_t_mr = 9,
ns_t_null = 10,
ns_t_wks = 11,
ns_t_ptr = 12,
ns_t_hinfo = 13,
ns_t_minfo = 14,
ns_t_mx = 15,
ns_t_txt = 16,
ns_t_rp = 17,
ns_t_afsdb = 18,
ns_t_x25 = 19,
ns_t_isdn = 20,
ns_t_rt = 21,
ns_t_nsap = 22,
ns_t_nsap_ptr = 23,
ns_t_sig = 24,
ns_t_key = 25,
ns_t_px = 26,
ns_t_gpos = 27,
ns_t_aaaa = 28,
ns_t_loc = 29,
ns_t_nxt = 30,
ns_t_eid = 31,
ns_t_nimloc = 32,
ns_t_srv = 33,
ns_t_atma = 34,
ns_t_naptr = 35,
ns_t_kx = 36,
ns_t_cert = 37,
ns_t_a6 = 38,
ns_t_dname = 39,
ns_t_sink = 40,
ns_t_opt = 41,
ns_t_apl = 42,
ns_t_ds = 43,
ns_t_sshfp = 44,
ns_t_ipseckey = 45,
ns_t_rrsig = 46,
ns_t_nsec = 47,
ns_t_dnskey = 48,
ns_t_dhcid = 49,
ns_t_nsec3 = 50,
ns_t_nsec3param = 51,
ns_t_tlsa = 52,
ns_t_smimea = 53,
ns_t_hip = 55,
ns_t_ninfo = 56,
ns_t_rkey = 57,
ns_t_talink = 58,
ns_t_cds = 59,
ns_t_cdnskey = 60,
ns_t_openpgpkey = 61,
ns_t_csync = 62,
ns_t_spf = 99,
ns_t_uinfo = 100,
ns_t_uid = 101,
ns_t_gid = 102,
ns_t_unspec = 103,
ns_t_nid = 104,
ns_t_l32 = 105,
ns_t_l64 = 106,
ns_t_lp = 107,
ns_t_eui48 = 108,
ns_t_eui64 = 109,
ns_t_tkey = 249,
ns_t_tsig = 250,
ns_t_ixfr = 251,
ns_t_axfr = 252,
ns_t_mailb = 253,
ns_t_maila = 254,
ns_t_any = 255,
ns_t_uri = 256,
ns_t_caa = 257,
ns_t_avc = 258,
ns_t_ta = 32768,
ns_t_dlv = 32769,
ns_t_max = 65536
} ns_type;
/*%
* Values for class field
*/
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;
/* Certificate type values in CERT resource records. */
typedef enum __ns_cert_types {
cert_t_pkix = 1, /*%< PKIX (X.509v3) */
cert_t_spki = 2, /*%< SPKI */
cert_t_pgp = 3, /*%< PGP */
cert_t_url = 253, /*%< URL private type */
cert_t_oid = 254 /*%< OID private type */
} ns_cert_types;
/*%
* EDNS0 extended flags and option codes, host order.
*/
#define NS_OPT_DNSSEC_OK 0x8000U
#define NS_OPT_NSID 3
/*%
* Inline versions of get/put short/long. Pointer is advanced.
*/
#define NS_GET16(s, cp) do { \
const unsigned char *t_cp = (const unsigned char *)(cp); \
(s) = ((uint16_t)t_cp[0] << 8) \
| ((uint16_t)t_cp[1]) \
; \
(cp) += NS_INT16SZ; \
} while (0)
#define NS_GET32(l, cp) do { \
const unsigned char *t_cp = (const unsigned char *)(cp); \
(l) = ((uint32_t)t_cp[0] << 24) \
| ((uint32_t)t_cp[1] << 16) \
| ((uint32_t)t_cp[2] << 8) \
| ((uint32_t)t_cp[3]) \
; \
(cp) += NS_INT32SZ; \
} while (0)
#define NS_PUT16(s, cp) do { \
uint16_t t_s = (uint16_t)(s); \
unsigned char *t_cp = (unsigned char *)(cp); \
*t_cp++ = t_s >> 8; \
*t_cp = t_s; \
(cp) += NS_INT16SZ; \
} while (0)
#define NS_PUT32(l, cp) do { \
uint32_t t_l = (uint32_t)(l); \
unsigned char *t_cp = (unsigned char *)(cp); \
*t_cp++ = t_l >> 24; \
*t_cp++ = t_l >> 16; \
*t_cp++ = t_l >> 8; \
*t_cp = t_l; \
(cp) += NS_INT32SZ; \
} while (0)
__BEGIN_DECLS
int ns_msg_getflag (ns_msg, int) __THROW;
unsigned int ns_get16 (const unsigned char *) __THROW;
unsigned long ns_get32 (const unsigned char *) __THROW;
void ns_put16 (unsigned int, unsigned char *) __THROW;
void ns_put32 (unsigned long, unsigned char *) __THROW;
int ns_initparse (const unsigned char *, int, ns_msg *) __THROW;
int ns_skiprr (const unsigned char *, const unsigned char *,
ns_sect, int) __THROW;
int ns_parserr (ns_msg *, ns_sect, int, ns_rr *) __THROW;
int ns_sprintrr (const ns_msg *, const ns_rr *,
const char *, const char *, char *, size_t)
__THROW;
int ns_sprintrrf (const unsigned char *, size_t, const char *,
ns_class, ns_type, unsigned long,
const unsigned char *, size_t, const char *,
const char *, char *, size_t) __THROW;
int ns_format_ttl (unsigned long, char *, size_t) __THROW;
int ns_parse_ttl (const char *, unsigned long *) __THROW;
uint32_t ns_datetosecs (const char *, int *) __THROW;
int ns_name_ntol (const unsigned char *, unsigned char *, size_t)
__THROW;
int ns_name_ntop (const unsigned char *, char *, size_t) __THROW;
int ns_name_pton (const char *, unsigned char *, size_t) __THROW;
int ns_name_unpack (const unsigned char *, const unsigned char *,
const unsigned char *, unsigned char *, size_t)
__THROW;
int ns_name_pack (const unsigned char *, unsigned char *, int,
const unsigned char **, const unsigned char **)
__THROW;
int ns_name_uncompress (const unsigned char *,
const unsigned char *,
const unsigned char *,
char *, size_t) __THROW;
int ns_name_compress (const char *, unsigned char *, size_t,
const unsigned char **,
const unsigned char **) __THROW;
int ns_name_skip (const unsigned char **, const unsigned char *)
__THROW;
void ns_name_rollback (const unsigned char *,
const unsigned char **,
const unsigned char **) __THROW;
int ns_samedomain (const char *, const char *) __THROW;
int ns_subdomain (const char *, const char *) __THROW;
int ns_makecanon (const char *, char *, size_t) __THROW;
int ns_samename (const char *, const char *) __THROW;
__END_DECLS
#include <arpa/nameser_compat.h>
#endif /* !_ARPA_NAMESER_H_ */
/*! \file */