| 1 | /*
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| 2 | * Copyright (c) 1983, 1989 Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms are permitted
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| 6 | * provided that: (1) source distributions retain this entire copyright
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| 7 | * notice and comment, and (2) distributions including binaries display
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| 8 | * the following acknowledgement: ``This product includes software
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| 9 | * developed by the University of California, Berkeley and its contributors''
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| 10 | * in the documentation or other materials provided with the distribution
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| 11 | * and in all advertising materials mentioning features or use of this
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| 12 | * software. Neither the name of the University nor the names of its
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| 13 | * contributors may be used to endorse or promote products derived
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| 14 | * from this software without specific prior written permission.
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| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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| 18 | *
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| 19 | * @(#)nameser.h 5.24 (Berkeley) 6/1/90
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| 20 | */
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| 21 |
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| 22 | /*
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| 23 | server/ip/gen/nameser.h
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| 24 |
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| 25 | Created Sept 18, 1991 by Philip Homburg
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| 26 | */
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| 27 |
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| 28 | #ifndef __SERVER__IP__GEN__NAEMSER_H__
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| 29 | #define __SERVER__IP__GEN__NAEMSER_H__
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| 30 |
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| 31 | typedef struct dns_hdr
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| 32 | {
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| 33 | u16_t dh_id;
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| 34 | u8_t dh_flag1;
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| 35 | u8_t dh_flag2;
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| 36 | u16_t dh_qdcount;
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| 37 | u16_t dh_ancount;
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| 38 | u16_t dh_nscount;
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| 39 | u16_t dh_arcount;
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| 40 | } dns_hdr_t;
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| 41 |
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| 42 | typedef dns_hdr_t HEADER;
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| 43 |
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| 44 | #define DHF_QR 0x80
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| 45 | #define DHF_OPCODE 0x78
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| 46 | #define DHF_AA 0x04
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| 47 | #define DHF_TC 0x02
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| 48 | #define DHF_RD 0x01
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| 49 |
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| 50 | #define DHF_RA 0x80
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| 51 | #define DHF_PR 0x40
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| 52 | #define DHF_UNUSED 0x30
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| 53 | #define DHF_RCODE 0x0F
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| 54 |
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| 55 | /*
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| 56 | Define constants based on rfc883
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| 57 | */
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| 58 | #define PACKETSZ 512 /* maximum packet size */
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| 59 | #define MAXDNAME 256 /* maximum domain name */
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| 60 | #define MAXCDNAME 255 /* maximum compressed domain name */
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| 61 | #define MAXLABEL 63 /* maximum length of domain label */
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| 62 | /* Number of bytes of fixed size data in query structure */
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| 63 | #define QFIXEDSZ 4
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| 64 | /* number of bytes of fixed size data in resource record */
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| 65 | #define RRFIXEDSZ 10
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| 66 | #define INDIR_MASK 0xc0
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| 67 | /* Defines for handling compressed domain names */
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| 68 |
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| 69 | /*
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| 70 | Opcodes for DNS
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| 71 | */
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| 72 |
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| 73 | #define QUERY 0x0 /* standard query */
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| 74 | #define IQUERY 0x1 /* inverse query */
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| 75 |
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| 76 | /*
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| 77 | Error codes
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| 78 | */
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| 79 | #define NOERROR 0 /* no error */
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| 80 | #define FORMERR 1 /* format error */
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| 81 | #define SERVFAIL 2 /* server failure */
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| 82 | #define NXDOMAIN 3 /* non existent domain */
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| 83 | #define NOTIMP 4 /* not implemented */
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| 84 | #define REFUSED 5 /* query refused */
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| 85 | /* non standard */
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| 86 | #define NOCHANGE 0xf /* update failed to change db */
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| 87 |
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| 88 | /* Valid types */
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| 89 |
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| 90 | #define T_A 1 /* host address */
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| 91 | #define T_NS 2 /* authoritative server */
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| 92 | #define T_MD 3 /* mail destination */
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| 93 | #define T_MF 4 /* mail forwarder */
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| 94 | #define T_CNAME 5 /* connonical name */
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| 95 | #define T_SOA 6 /* start of authority zone */
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| 96 | #define T_MB 7 /* mailbox domain name */
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| 97 | #define T_MG 8 /* mail group member */
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| 98 | #define T_MR 9 /* mail rename name */
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| 99 | #define T_NULL 10 /* null resource record */
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| 100 | #define T_WKS 11 /* well known service */
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| 101 | #define T_PTR 12 /* domain name pointer */
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| 102 | #define T_HINFO 13 /* host information */
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| 103 | #define T_MINFO 14 /* mailbox information */
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| 104 | #define T_MX 15 /* mail routing information */
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| 105 | #define T_TXT 16 /* text strings */
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| 106 | /* non standard */
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| 107 | #define T_UINFO 100 /* user (finger) information */
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| 108 | #define T_UID 101 /* user ID */
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| 109 | #define T_GID 102 /* group ID */
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| 110 | #define T_UNSPEC 103 /* Unspecified format (binary data) */
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| 111 | /* Query type values which do not appear in resource records */
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| 112 | #define T_AXFR 252 /* transfer zone of authority */
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| 113 | #define T_MAILB 253 /* transfer mailbox records */
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| 114 | #define T_MAILA 254 /* transfer mail agent records */
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| 115 | #define T_ANY 255 /* wildcard match */
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| 116 |
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| 117 | /* Valid classes */
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| 118 |
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| 119 | #define C_IN 1 /* the internet */
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| 120 | #define C_CHAOS 3 /* for chaos net (MIT) */
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| 121 | #define C_HS 4 /* for Hesiod name server at MIT */
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| 122 |
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| 123 | #define C_ANY 255 /* wildcard */
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| 124 |
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| 125 | #endif /* __SERVER__IP__GEN__NAEMSER_H__ */
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