125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
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/*
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* Copyright (c) 1983, 1989 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#)nameser.h 5.24 (Berkeley) 6/1/90
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*/
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/*
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server/ip/gen/nameser.h
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Created Sept 18, 1991 by Philip Homburg
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*/
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#ifndef __SERVER__IP__GEN__NAEMSER_H__
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#define __SERVER__IP__GEN__NAEMSER_H__
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typedef struct dns_hdr
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{
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u16_t dh_id;
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u8_t dh_flag1;
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u8_t dh_flag2;
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u16_t dh_qdcount;
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u16_t dh_ancount;
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u16_t dh_nscount;
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u16_t dh_arcount;
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} dns_hdr_t;
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#define DHF_QR 0x80
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#define DHF_OPCODE 0x78
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#define DHF_AA 0x04
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#define DHF_TC 0x02
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#define DHF_RD 0x01
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#define DHF_RA 0x80
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#define DHF_PR 0x40
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#define DHF_UNUSED 0x30
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#define DHF_RCODE 0x0F
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/*
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Define constants based on rfc883
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*/
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#define PACKETSZ 512 /* maximum packet size */
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#define MAXDNAME 256 /* maximum domain name */
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#define MAXCDNAME 255 /* maximum compressed domain name */
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#define MAXLABEL 63 /* maximum length of domain label */
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/* Number of bytes of fixed size data in query structure */
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#define QFIXEDSZ 4
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/* number of bytes of fixed size data in resource record */
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#define RRFIXEDSZ 10
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#define INDIR_MASK 0xc0
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/* Defines for handling compressed domain names */
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/*
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Opcodes for DNS
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*/
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#define QUERY 0x0 /* standard query */
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#define IQUERY 0x1 /* inverse query */
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/*
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Error codes
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*/
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#define NOERROR 0 /* no error */
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#define FORMERR 1 /* format error */
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#define SERVFAIL 2 /* server failure */
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#define NXDOMAIN 3 /* non existent domain */
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#define NOTIMP 4 /* not implemented */
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#define REFUSED 5 /* query refused */
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/* non standard */
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#define NOCHANGE 0xf /* update failed to change db */
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/* Valid types */
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#define T_A 1 /* host address */
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#define T_NS 2 /* authoritative server */
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#define T_MD 3 /* mail destination */
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#define T_MF 4 /* mail forwarder */
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#define T_CNAME 5 /* connonical name */
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#define T_SOA 6 /* start of authority zone */
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#define T_MB 7 /* mailbox domain name */
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#define T_MG 8 /* mail group member */
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#define T_MR 9 /* mail rename name */
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#define T_NULL 10 /* null resource record */
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#define T_WKS 11 /* well known service */
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#define T_PTR 12 /* domain name pointer */
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#define T_HINFO 13 /* host information */
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#define T_MINFO 14 /* mailbox information */
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#define T_MX 15 /* mail routing information */
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#define T_TXT 16 /* text strings */
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/* non standard */
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#define T_UINFO 100 /* user (finger) information */
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#define T_UID 101 /* user ID */
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#define T_GID 102 /* group ID */
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#define T_UNSPEC 103 /* Unspecified format (binary data) */
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/* Query type values which do not appear in resource records */
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#define T_AXFR 252 /* transfer zone of authority */
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#define T_MAILB 253 /* transfer mailbox records */
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#define T_MAILA 254 /* transfer mail agent records */
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#define T_ANY 255 /* wildcard match */
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/* Valid classes */
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#define C_IN 1 /* the internet */
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#define C_CHAOS 3 /* for chaos net (MIT) */
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#define C_HS 4 /* for Hesiod name server at MIT */
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#define C_ANY 255 /* wildcard */
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#endif /* __SERVER__IP__GEN__NAEMSER_H__ */
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