home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
OS/2 Arsenal
/
OS2 Arsenal v1.0 (Disc 2)(Arsenal Computer).ISO
/
os2_inet
/
progcsd.exe
/
NAMESER.H
< prev
next >
Wrap
Text File
|
1992-10-02
|
8KB
|
165 lines
/********************************************************copyrite.xmc***/
/* */
/* Licensed Materials - Property of IBM */
/* */
/* This module is "Restricted Materials of IBM": */
/* Program Number: 5798RXW */
/* Program Name: IBM TCP/IP Version 1.2 for OS/2 */
/* (C) Copyright IBM Corporation. 1990, 1991. */
/* */
/* See IBM Copyright Instructions. */
/* */
/********************************************************copyrite.xmc***/
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)nameser.h 5.20 (Berkeley) 10/7/88
*/
#ifndef __32BIT__
#define _Packed
#define _Seg16
#define _Far16
#define _Cdecl
#endif
/*
* 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 0 /* standard query */
#define IQUERY 1 /* inverse query */
#define CQUERYM 2 /* completion query (multiple) */
#define CQUERYU 3 /* completion query (unique) */
/* non standard */
#define UPDATEA 100 /* add resource record */
#define UPDATED 101 /* delete resource record */
#define UPDATEM 102 /* modify resource record */
#define ZONEINIT 103 /* initial zone transfer */
#define ZONEREF 104 /* incremental zone referesh */
/*
* Currently defined response 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 100 /* 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 */
/* non standard */
#define T_UINFO 100 /* user (finger) information */
#define T_UID 101 /* user ID */
#define T_GID 102 /* group ID */
/* 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 */
/* Query class values which do not appear in resource records */
#define C_ANY 255 /* wildcard match */
/*
* 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 {
u_short id; /* query identification number */
u_char rd:1; /* recursion desired */
u_char tc:1; /* truncated message */
u_char aa:1; /* authoritive answer */
u_char opcode:4; /* purpose of message */
u_char qr:1; /* response flag */
/* fields in fourth byte */
u_char rcode:4; /* response code */
u_char unused:2; /* unused bits */
u_char pr:1; /* primary server required (non standard) */
u_char ra:1; /* recursion available */
/* remaining bytes */
u_short qdcount; /* number of question entries */
u_short ancount; /* number of answer entries */
u_short nscount; /* number of authority entries */
u_short arcount; /* number of resource entries */
} HEADER;
/*
* Defines for handling compressed domain names
*/
#define INDIR_MASK 0xc0
/*
* Structure for passing resource records around.
*/
_Packed struct rrec {
short r_zone; /* zone number */
short r_class; /* class number */
short r_type; /* type number */
u_long r_ttl; /* time to live */
short r_size; /* size of data area */
char * _Seg16 r_data; /* pointer to data */
};
#if 0
extern u_short _Far16 _Cdecl getshort();
extern u_long _Far16 _Cdecl getlong();
#endif