f8f1d6e80f
since it has far wider impact than hostname lookups (including passwords). Note that this has more ugly symbol hiding and binary compatability hacks that can go away the second we bump majors. Obtained from: Mostly from diff against ISC bind-8.1.2 sources
449 lines
16 KiB
C
449 lines
16 KiB
C
/*
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* Copyright (c) 1983, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1996 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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/*
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* From: Id: nameser.h,v 8.16 1998/02/06 00:35:58 halley Exp
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* $Id$
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*/
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#ifndef _ARPA_NAMESER_H_
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#define _ARPA_NAMESER_H_
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#define BIND_4_COMPAT
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#include <sys/types.h>
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#include <sys/cdefs.h>
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/*
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* revision information. this is the release date in YYYYMMDD format.
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* it can change every day so the right thing to do with it is use it
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* in preprocessor commands such as "#if (__NAMESER > 19931104)". do not
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* compare for equality; rather, use it to determine whether your libnameser.a
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* is new enough to contain a certain feature.
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*/
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/* XXXRTH I made this bigger than __BIND in 4.9.5 T6B */
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#define __NAMESER 19961001 /* New interface version stamp. */
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/*
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* Define constants based on RFC 883, RFC 1034, RFC 1035
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*/
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#define NS_PACKETSZ 512 /* maximum packet size */
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#define NS_MAXDNAME 1025 /* maximum domain name */
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#define NS_MAXCDNAME 255 /* maximum compressed domain name */
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#define NS_MAXLABEL 63 /* maximum length of domain label */
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#define NS_HFIXEDSZ 12 /* #/bytes of fixed data in header */
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#define NS_QFIXEDSZ 4 /* #/bytes of fixed data in query */
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#define NS_RRFIXEDSZ 10 /* #/bytes of fixed data in r record */
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#define NS_INT32SZ 4 /* #/bytes of data in a u_int32_t */
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#define NS_INT16SZ 2 /* #/bytes of data in a u_int16_t */
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#define NS_INT8SZ 1 /* #/bytes of data in a u_int8_t */
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#define NS_INADDRSZ 4 /* IPv4 T_A */
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#define NS_IN6ADDRSZ 16 /* IPv6 T_AAAA */
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#define NS_CMPRSFLGS 0xc0 /* Flag bits indicating name compression. */
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#define NS_DEFAULTPORT 53 /* For both TCP and UDP. */
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/*
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* These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
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* in synch with it.
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*/
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typedef enum __ns_sect {
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ns_s_qd = 0, /* Query: Question. */
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ns_s_zn = 0, /* Update: Zone. */
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ns_s_an = 1, /* Query: Answer. */
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ns_s_pr = 1, /* Update: Prerequisites. */
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ns_s_ns = 2, /* Query: Name servers. */
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ns_s_ud = 2, /* Update: Update. */
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ns_s_ar = 3, /* Query|Update: Additional records. */
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ns_s_max = 4
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} ns_sect;
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/*
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* This is a message handle. It is caller allocated and has no dynamic data.
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* This structure is intended to be opaque to all but ns_parse.c, thus the
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* leading _'s on the member names. Use the accessor functions, not the _'s.
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*/
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typedef struct __ns_msg {
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const u_char *_msg, *_eom;
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u_int16_t _id, _flags, _counts[ns_s_max];
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const u_char *_sections[ns_s_max];
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ns_sect _sect;
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int _rrnum;
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const u_char *_ptr;
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} ns_msg;
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/* Private data structure - do not use from outside library. */
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struct _ns_flagdata { int mask, shift; };
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extern struct _ns_flagdata _ns_flagdata[];
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/* Accessor macros - this is part of the public interface. */
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#define ns_msg_getflag(handle, flag) ( \
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((handle)._flags & _ns_flagdata[flag].mask) \
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>> _ns_flagdata[flag].shift \
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)
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#define ns_msg_id(handle) ((handle)._id + 0)
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#define ns_msg_base(handle) ((handle)._msg + 0)
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#define ns_msg_end(handle) ((handle)._eom + 0)
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#define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
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#define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
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/*
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* This is a parsed record. It is caller allocated and has no dynamic data.
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*/
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typedef struct __ns_rr {
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char name[NS_MAXDNAME]; /* XXX need to malloc */
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u_int16_t type;
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u_int16_t class;
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u_int32_t ttl;
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u_int16_t rdlength;
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const u_char *rdata;
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} ns_rr;
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/* Accessor macros - this is part of the public interface. */
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#define ns_rr_name(rr) (((rr).name[0] != '\0') ? (rr).name : ".")
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#define ns_rr_type(rr) ((rr).type + 0)
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#define ns_rr_class(rr) ((rr).class + 0)
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#define ns_rr_ttl(rr) ((rr).ttl + 0)
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#define ns_rr_rdlen(rr) ((rr).rdlength + 0)
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#define ns_rr_rdata(rr) ((rr).rdata + 0)
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/*
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* These don't have to be in the same order as in the packet flags word,
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* and they can even overlap in some cases, but they will need to be kept
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* in synch with ns_parse.c:ns_flagdata[].
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*/
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typedef enum __ns_flag {
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ns_f_qr, /* Question/Response. */
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ns_f_opcode, /* Operation code. */
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ns_f_aa, /* Authoritative Answer. */
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ns_f_tc, /* Truncation occurred. */
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ns_f_rd, /* Recursion Desired. */
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ns_f_ra, /* Recursion Available. */
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ns_f_z, /* MBZ. */
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ns_f_ad, /* Authentic Data (DNSSEC). */
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ns_f_cd, /* Checking Disabled (DNSSEC). */
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ns_f_rcode, /* Response code. */
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ns_f_max
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} ns_flag;
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/*
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* Currently defined opcodes.
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*/
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typedef enum __ns_opcode {
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ns_o_query = 0, /* Standard query. */
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ns_o_iquery = 1, /* Inverse query (deprecated/unsupported). */
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ns_o_status = 2, /* Name server status query (unsupported). */
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/* Opcode 3 is undefined/reserved. */
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ns_o_notify = 4, /* Zone change notification. */
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ns_o_update = 5, /* Zone update message. */
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ns_o_max = 6
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} ns_opcode;
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/*
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* Currently defined response codes.
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*/
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typedef enum __ns_rcode {
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ns_r_noerror = 0, /* No error occurred. */
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ns_r_formerr = 1, /* Format error. */
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ns_r_servfail = 2, /* Server failure. */
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ns_r_nxdomain = 3, /* Name error. */
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ns_r_notimpl = 4, /* Unimplemented. */
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ns_r_refused = 5, /* Operation refused. */
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/* these are for BIND_UPDATE */
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ns_r_yxdomain = 6, /* Name exists */
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ns_r_yxrrset = 7, /* RRset exists */
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ns_r_nxrrset = 8, /* RRset does not exist */
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ns_r_notauth = 9, /* Not authoritative for zone */
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ns_r_notzone = 10, /* Zone of record different from zone section */
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ns_r_max = 11
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} ns_rcode;
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/* BIND_UPDATE */
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typedef enum __ns_update_operation {
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ns_uop_delete = 0,
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ns_uop_add = 1,
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ns_uop_max = 2
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} ns_update_operation;
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/*
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* This RR-like structure is particular to UPDATE.
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*/
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struct ns_updrec {
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struct ns_updrec *r_prev; /* prev record */
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struct ns_updrec *r_next; /* next record */
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u_int8_t r_section; /* ZONE/PREREQUISITE/UPDATE */
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char * r_dname; /* owner of the RR */
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u_int16_t r_class; /* class number */
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u_int16_t r_type; /* type number */
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u_int32_t r_ttl; /* time to live */
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u_char * r_data; /* rdata fields as text string */
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u_int16_t r_size; /* size of r_data field */
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int r_opcode; /* type of operation */
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/* following fields for private use by the resolver/server routines */
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struct ns_updrec *r_grpnext; /* next record when grouped */
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struct databuf *r_dp; /* databuf to process */
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struct databuf *r_deldp; /* databuf's deleted/overwritten */
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u_int16_t r_zone; /* zone number on server */
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};
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typedef struct ns_updrec ns_updrec;
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/*
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* Currently defined type values for resources and queries.
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*/
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typedef enum __ns_type {
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ns_t_a = 1, /* Host address. */
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ns_t_ns = 2, /* Authoritative server. */
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ns_t_md = 3, /* Mail destination. */
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ns_t_mf = 4, /* Mail forwarder. */
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ns_t_cname = 5, /* Canonical name. */
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ns_t_soa = 6, /* Start of authority zone. */
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ns_t_mb = 7, /* Mailbox domain name. */
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ns_t_mg = 8, /* Mail group member. */
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ns_t_mr = 9, /* Mail rename name. */
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ns_t_null = 10, /* Null resource record. */
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ns_t_wks = 11, /* Well known service. */
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ns_t_ptr = 12, /* Domain name pointer. */
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ns_t_hinfo = 13, /* Host information. */
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ns_t_minfo = 14, /* Mailbox information. */
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ns_t_mx = 15, /* Mail routing information. */
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ns_t_txt = 16, /* Text strings. */
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ns_t_rp = 17, /* Responsible person. */
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ns_t_afsdb = 18, /* AFS cell database. */
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ns_t_x25 = 19, /* X_25 calling address. */
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ns_t_isdn = 20, /* ISDN calling address. */
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ns_t_rt = 21, /* Router. */
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ns_t_nsap = 22, /* NSAP address. */
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ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */
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ns_t_sig = 24, /* Security signature. */
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ns_t_key = 25, /* Security key. */
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ns_t_px = 26, /* X.400 mail mapping. */
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ns_t_gpos = 27, /* Geographical position (withdrawn). */
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ns_t_aaaa = 28, /* Ip6 Address. */
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ns_t_loc = 29, /* Location Information. */
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ns_t_nxt = 30, /* Next domain (security). */
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ns_t_eid = 31, /* Endpoint identifier. */
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ns_t_nimloc = 32, /* Nimrod Locator. */
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ns_t_srv = 33, /* Server Selection. */
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ns_t_atma = 34, /* ATM Address */
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ns_t_naptr = 35, /* Naming Authority PoinTeR */
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/* Query type values which do not appear in resource records. */
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ns_t_ixfr = 251, /* Incremental zone transfer. */
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ns_t_axfr = 252, /* Transfer zone of authority. */
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ns_t_mailb = 253, /* Transfer mailbox records. */
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ns_t_maila = 254, /* Transfer mail agent records. */
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ns_t_any = 255, /* Wildcard match. */
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ns_t_max = 65536
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} ns_type;
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/*
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* Values for class field
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*/
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typedef enum __ns_class {
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ns_c_in = 1, /* Internet. */
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/* Class 2 unallocated/unsupported. */
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ns_c_chaos = 3, /* MIT Chaos-net. */
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ns_c_hs = 4, /* MIT Hesiod. */
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/* Query class values which do not appear in resource records */
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ns_c_none = 254, /* for prereq. sections in update requests */
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ns_c_any = 255, /* Wildcard match. */
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ns_c_max = 65536
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} ns_class;
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/*
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* Flags field of the KEY RR rdata
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*/
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#define NS_KEY_TYPEMASK 0xC000 /* Mask for "type" bits */
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#define NS_KEY_TYPE_AUTH_CONF 0x0000 /* Key usable for both */
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#define NS_KEY_TYPE_CONF_ONLY 0x8000 /* Key usable for confidentiality */
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#define NS_KEY_TYPE_AUTH_ONLY 0x4000 /* Key usable for authentication */
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#define NS_KEY_TYPE_NO_KEY 0xC000 /* No key usable for either; no key */
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/* The type bits can also be interpreted independently, as single bits: */
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#define NS_KEY_NO_AUTH 0x8000 /* Key unusable for authentication */
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#define NS_KEY_NO_CONF 0x4000 /* Key unusable for confidentiality */
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#define NS_KEY_EXPERIMENTAL 0x2000 /* Security is *mandatory* if bit=0 */
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#define NS_KEY_RESERVED3 0x1000 /* reserved - must be zero */
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#define NS_KEY_RESERVED4 0x0800 /* reserved - must be zero */
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#define NS_KEY_USERACCOUNT 0x0400 /* key is assoc. with a user acct */
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#define NS_KEY_ENTITY 0x0200 /* key is assoc. with entity eg host */
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#define NS_KEY_ZONEKEY 0x0100 /* key is zone key */
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#define NS_KEY_IPSEC 0x0080 /* key is for IPSEC (host or user)*/
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#define NS_KEY_EMAIL 0x0040 /* key is for email (MIME security) */
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#define NS_KEY_RESERVED10 0x0020 /* reserved - must be zero */
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#define NS_KEY_RESERVED11 0x0010 /* reserved - must be zero */
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#define NS_KEY_SIGNATORYMASK 0x000F /* key can sign RR's of same name */
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#define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED3 | \
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NS_KEY_RESERVED4 | \
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NS_KEY_RESERVED10 | \
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NS_KEY_RESERVED11 )
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/* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
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#define NS_ALG_MD5RSA 1 /* MD5 with RSA */
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#define NS_ALG_EXPIRE_ONLY 253 /* No alg, no security */
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#define NS_ALG_PRIVATE_OID 254 /* Key begins with OID giving alg */
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/* Signatures */
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#define NS_MD5RSA_MIN_BITS 512 /* Size of a mod or exp in bits */
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#define NS_MD5RSA_MAX_BITS 2552
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/* Total of binary mod and exp */
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#define NS_MD5RSA_MAX_BYTES ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
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/* Max length of text sig block */
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#define NS_MD5RSA_MAX_BASE64 (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
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/* Offsets into SIG record rdata to find various values */
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#define NS_SIG_TYPE 0 /* Type flags */
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#define NS_SIG_ALG 2 /* Algorithm */
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#define NS_SIG_LABELS 3 /* How many labels in name */
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#define NS_SIG_OTTL 4 /* Original TTL */
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#define NS_SIG_EXPIR 8 /* Expiration time */
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#define NS_SIG_SIGNED 12 /* Signature time */
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#define NS_SIG_FOOT 16 /* Key footprint */
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#define NS_SIG_SIGNER 18 /* Domain name of who signed it */
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/* How RR types are represented as bit-flags in NXT records */
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#define NS_NXT_BITS 8
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#define NS_NXT_BIT_SET( n,p) (p[(n)/NS_NXT_BITS] |= (0x80>>((n)%NS_NXT_BITS)))
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#define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
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#define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] & (0x80>>((n)%NS_NXT_BITS)))
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/*
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* Inline versions of get/put short/long. Pointer is advanced.
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*/
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#define NS_GET16(s, cp) { \
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register u_char *t_cp = (u_char *)(cp); \
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(s) = ((u_int16_t)t_cp[0] << 8) \
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| ((u_int16_t)t_cp[1]) \
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; \
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(cp) += NS_INT16SZ; \
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}
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#define NS_GET32(l, cp) { \
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register u_char *t_cp = (u_char *)(cp); \
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(l) = ((u_int32_t)t_cp[0] << 24) \
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| ((u_int32_t)t_cp[1] << 16) \
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| ((u_int32_t)t_cp[2] << 8) \
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| ((u_int32_t)t_cp[3]) \
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; \
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(cp) += NS_INT32SZ; \
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}
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#define NS_PUT16(s, cp) { \
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register u_int16_t t_s = (u_int16_t)(s); \
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register u_char *t_cp = (u_char *)(cp); \
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*t_cp++ = t_s >> 8; \
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*t_cp = t_s; \
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(cp) += NS_INT16SZ; \
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}
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#define NS_PUT32(l, cp) { \
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register u_int32_t t_l = (u_int32_t)(l); \
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register u_char *t_cp = (u_char *)(cp); \
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*t_cp++ = t_l >> 24; \
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*t_cp++ = t_l >> 16; \
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*t_cp++ = t_l >> 8; \
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*t_cp = t_l; \
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(cp) += NS_INT32SZ; \
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}
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/*
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* ANSI C identifier hiding.
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*/
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#define ns_get16 __ns_get16
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#define ns_get32 __ns_get32
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#define ns_put16 __ns_put16
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#define ns_put32 __ns_put32
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#define ns_initparse __ns_initparse
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#define ns_parserr __ns_parserr
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#define ns_sprintrr __ns_sprintrr
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#define ns_sprintrrf __ns_sprintrrf
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#define ns_format_ttl __ns_format_ttl
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#define ns_parse_ttl __ns_parse_ttl
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#define ns_name_ntop __ns_name_ntop
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#define ns_name_pton __ns_name_pton
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#define ns_name_unpack __ns_name_unpack
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#define ns_name_pack __ns_name_pack
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#define ns_name_compress __ns_name_compress
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#define ns_name_uncompress __ns_name_uncompress
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__BEGIN_DECLS
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u_int ns_get16 __P((const u_char *));
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u_long ns_get32 __P((const u_char *));
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void ns_put16 __P((u_int, u_char *));
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void ns_put32 __P((u_long, u_char *));
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int ns_initparse __P((const u_char *, int, ns_msg *));
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int ns_parserr __P((ns_msg *, ns_sect, int, ns_rr *));
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int ns_sprintrr __P((const ns_msg *, const ns_rr *,
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const char *, const char *, char *, size_t));
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int ns_sprintrrf __P((const u_char *, size_t, const char *,
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ns_class, ns_type, u_long, const u_char *,
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size_t, const char *, const char *,
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char *, size_t));
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int ns_format_ttl __P((u_long, char *, size_t));
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int ns_parse_ttl __P((const char *, u_long *));
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int ns_name_ntop __P((const u_char *, char *, size_t));
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int ns_name_pton __P((const char *, u_char *, size_t));
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int ns_name_unpack __P((const u_char *, const u_char *,
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const u_char *, u_char *, size_t));
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int ns_name_pack __P((const u_char *, u_char *, int,
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const u_char **, const u_char **));
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int ns_name_uncompress __P((const u_char *, const u_char *,
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|
const u_char *, char *, size_t));
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int ns_name_compress __P((const char *, u_char *, size_t,
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const u_char **, const u_char **));
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int ns_name_skip __P((const u_char **, const u_char *));
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__END_DECLS
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|
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#ifdef BIND_4_COMPAT
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#include <arpa/nameser_compat.h>
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#endif
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#endif /* !_ARPA_NAMESER_H_ */
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