include/net/gen/nameser.h

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