Source code of Windows XP (NT5)
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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
Module Name:
nameser.h
Abstract:
Definitions for the DNS resolver and nameserver.
Author:
Mike Massa (mikemas) Jan 31, 1992
Revision History:
Who When What -------- -------- ---------------------------------------------- mikemas 01-31-92 created
Notes:
--*/
/****************************************************************** * * SpiderTCP BIND * * Copyright 1990 Spider Systems Limited * * NAMESER.H * ******************************************************************/
/* * /usr/projects/tcp/SCCS.rel3/rel/src/include/arpa/0/s.nameser.h * @(#)nameser.h 5.3 * * Last delta created 14:06:04 3/4/91 * This file extracted 11:19:28 3/8/91 * * Modifications: * * GSS 20 Jul 90 New File */
/* * Copyright (c) 1983, 1989 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that: (1) source distributions retain this entire copyright * notice and comment, and (2) distributions including binaries display * the following acknowledgement: ``This product includes software * developed by the University of California, Berkeley and its contributors'' * in the documentation or other materials provided with the distribution * and in all advertising materials mentioning features or use of this * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * @(#)nameser.h 5.24 (Berkeley) 6/1/90 */
#ifndef _NAMESER_INCLUDED#define _NAMESER_INCLUDED
/* * Define constants based on rfc883 */#define PACKETSZ 512 /* maximum packet size */#define MAXDNAME 256 /* maximum domain name */#define MAXCDNAME 255 /* maximum compressed domain name */#define MAXLABEL 63 /* maximum length of domain label */ /* Number of bytes of fixed size data in query structure */#define QFIXEDSZ 4 /* number of bytes of fixed size data in resource record */#define RRFIXEDSZ 10
/* * Internet nameserver port number */#define NAMESERVER_PORT 53
/* * Currently defined opcodes */#define QUERY 0x0 /* standard query */#define IQUERY 0x1 /* inverse query */#define STATUS 0x2 /* nameserver status query *//*#define xxx 0x3 /* 0x3 reserved */ /* non standard */#define UPDATEA 0x9 /* add resource record */#define UPDATED 0xa /* delete a specific resource record */#define UPDATEDA 0xb /* delete all nemed resource record */#define UPDATEM 0xc /* modify a specific resource record */#define UPDATEMA 0xd /* modify all named resource record */
#define ZONEINIT 0xe /* initial zone transfer */#define ZONEREF 0xf /* incremental zone referesh */
/* * Currently defined response codes */#ifndef NOERROR#define NOERROR 0 /* no error */#endif#define FORMERR 1 /* format error */#define SERVFAIL 2 /* server failure */#define NXDOMAIN 3 /* non existent domain */#define NOTIMP 4 /* not implemented */#define REFUSED 5 /* query refused */ /* non standard */#define NOCHANGE 0xf /* update failed to change db */
/* * Type values for resources and queries */#define T_A 1 /* host address */#define T_NS 2 /* authoritative server */#define T_MD 3 /* mail destination */#define T_MF 4 /* mail forwarder */#define T_CNAME 5 /* connonical name */#define T_SOA 6 /* start of authority zone */#define T_MB 7 /* mailbox domain name */#define T_MG 8 /* mail group member */#define T_MR 9 /* mail rename name */#define T_NULL 10 /* null resource record */#define T_WKS 11 /* well known service */#define T_PTR 12 /* domain name pointer */#define T_HINFO 13 /* host information */#define T_MINFO 14 /* mailbox information */#define T_MX 15 /* mail routing information */#define T_TXT 16 /* text strings */#define T_AFSDB 18 /* AFS database servers */#define T_ATMA 34 /* ATM endpoint address */ /* non standard */#define T_UINFO 100 /* user (finger) information */#define T_UID 101 /* user ID */#define T_GID 102 /* group ID */#define T_UNSPEC 103 /* Unspecified format (binary data) */ /* Query type values which do not appear in resource records */#define T_AXFR 252 /* transfer zone of authority */#define T_MAILB 253 /* transfer mailbox records */#define T_MAILA 254 /* transfer mail agent records */#define T_ANY 255 /* wildcard match */
/* * Values for class field */
#define C_IN 1 /* the arpa internet */#define C_CHAOS 3 /* for chaos net at MIT */#define C_HS 4 /* for Hesiod name server at MIT */ /* Query class values which do not appear in resource records */#define C_ANY 255 /* wildcard match */
/* * Status return codes for T_UNSPEC conversion routines */#define CONV_SUCCESS 0#define CONV_OVERFLOW -1#define CONV_BADFMT -2#define CONV_BADCKSUM -3#define CONV_BADBUFLEN -4
#ifndef BYTE_ORDER#define LITTLE_ENDIAN 1234 /* least-significant byte first (vax) */#define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp) */
#if defined(vax) || defined(ns32000) || defined(sun386) || defined(MIPSEL) || \ defined(BIT_ZERO_ON_RIGHT)#define BYTE_ORDER LITTLE_ENDIAN
#endif#if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \ defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \ defined(MIPSEB) || defined (BIT_ZERO_ON_LEFT)#define BYTE_ORDER BIG_ENDIAN#endif#ifndef BYTE_ORDER /* still not defined */#if defined(u3b2) || defined(m68k)#define BYTE_ORDER BIG_ENDIAN#endif#if defined(i286) || defined(i386) || defined(_AMD64_) || defined(_IA64_)#define BYTE_ORDER LITTLE_ENDIAN#endif#endif /* ~BYTE_ORDER */#endif /* BYTE_ORDER */
#ifndef BYTE_ORDER /* you must determine what the correct bit order is for your compiler */ UNDEFINED_BIT_ORDER;#endif/* * Structure for query header, the order of the fields is machine and * compiler dependent, in our case, the bits within a byte are assignd * least significant first, while the order of transmition is most * significant first. This requires a somewhat confusing rearrangement. */
typedef struct { unsigned short id; /* query identification number */#if BYTE_ORDER == BIG_ENDIAN /* fields in third byte */ unsigned char qr:1; /* response flag */ unsigned char opcode:4; /* purpose of message */ unsigned char aa:1; /* authoritive answer */ unsigned char tc:1; /* truncated message */ unsigned char rd:1; /* recursion desired */ /* fields in fourth byte */ unsigned char ra:1; /* recursion available */ unsigned char pr:1; /* primary server required (non standard) */ unsigned char unused:2; /* unused bits */ unsigned char rcode:4; /* response code */#endif#if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN /* fields in third byte */ unsigned char rd:1; /* recursion desired */ unsigned char tc:1; /* truncated message */ unsigned char aa:1; /* authoritive answer */ unsigned char opcode:4; /* purpose of message */ unsigned char qr:1; /* response flag */ /* fields in fourth byte */ unsigned char rcode:4; /* response code */ unsigned char unused:2; /* unused bits */ unsigned char pr:1; /* primary server required (non standard) */ unsigned char ra:1; /* recursion available */#endif /* remaining bytes */ unsigned short qdcount; /* number of question entries */ unsigned short ancount; /* number of answer entries */ unsigned short nscount; /* number of authority entries */ unsigned short arcount; /* number of resource entries */} HEADER;
/* * Defines for handling compressed domain names */#define INDIR_MASK 0xc0
/* * Structure for passing resource records around. */struct rrec { short r_zone; /* zone number */ short r_class; /* class number */ short r_type; /* type number */ unsigned long r_ttl; /* time to live */ int r_size; /* size of data area */ char *r_data; /* pointer to data */};
extern unsigned short _getshort();extern unsigned long _getlong();
/* * Inline versions of get/put short/long. * Pointer is advanced; we assume that both arguments * are lvalues and will already be in registers. * cp MUST be unsigned char *. */#define GETSHORT(s, cp) { \ (s) = *(cp)++ << 8; \ (s) |= *(cp)++; \}
#define GETLONG(l, cp) { \ (l) = *(cp)++ << 8; \ (l) |= *(cp)++; (l) <<= 8; \ (l) |= *(cp)++; (l) <<= 8; \ (l) |= *(cp)++; \}
#define PUTSHORT(s, cp) { \ *(cp)++ = (s) >> 8; \ *(cp)++ = (s); \}
/* * Warning: PUTLONG destroys its first argument. */#define PUTLONG(l, cp) { \ (cp)[3] = l; \ (cp)[2] = (l >>= 8); \ (cp)[1] = (l >>= 8); \ (cp)[0] = l >> 8; \ (cp) += sizeof(unsigned long); \}
#endif // _NAMESER_INCLUDED
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