minix/include/net/gen/nameser.h

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2005-04-21 16:53:53 +02:00
/*
* 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
*/
/*
server/ip/gen/nameser.h
Created Sept 18, 1991 by Philip Homburg
*/
#ifndef __SERVER__IP__GEN__NAEMSER_H__
#define __SERVER__IP__GEN__NAEMSER_H__
typedef struct dns_hdr
{
u16_t dh_id;
u8_t dh_flag1;
u8_t dh_flag2;
u16_t dh_qdcount;
u16_t dh_ancount;
u16_t dh_nscount;
u16_t dh_arcount;
} dns_hdr_t;
#define DHF_QR 0x80
#define DHF_OPCODE 0x78
#define DHF_AA 0x04
#define DHF_TC 0x02
#define DHF_RD 0x01
#define DHF_RA 0x80
#define DHF_PR 0x40
#define DHF_UNUSED 0x30
#define DHF_RCODE 0x0F
/*
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
#define INDIR_MASK 0xc0
/* Defines for handling compressed domain names */
/*
Opcodes for DNS
*/
#define QUERY 0x0 /* standard query */
#define IQUERY 0x1 /* inverse query */
/*
Error codes
*/
#define NOERROR 0 /* no error */
#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 */
/* Valid types */
#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 */
/* 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 */
/* Valid classes */
#define C_IN 1 /* the internet */
#define C_CHAOS 3 /* for chaos net (MIT) */
#define C_HS 4 /* for Hesiod name server at MIT */
#define C_ANY 255 /* wildcard */
#endif /* __SERVER__IP__GEN__NAEMSER_H__ */