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OS/2 Shareware BBS: 10 Tools
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detk45he.zip
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stack16
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arpa
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nameser.h
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1999-05-11
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219 lines
#ifndef __NAMESER_32H
#define __NAMESER_32H
/*
* 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
*/
/* Modification History: *****************************************************/
/* Date: By: Tag: Desc: */
/* 09.24.96 DRC DRC01 Added definition of _System for Borland Compiler */
/* 10.04.96 MRN F17505 Added prototypes for res_query, res_search and */
/* res_querydomain. */
/*****************************************************************************/
/* DRC01 - Borland fix */
#ifdef __BORLANDC__
#define _System _syscall
#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 {
unsigned short id; /* query identification number */
#ifdef OS2
unsigned int rd:1; /* recursion desired */
unsigned int tc:1; /* truncated message */
unsigned int aa:1; /* authoritive answer */
unsigned int opcode:4; /* purpose of message */
unsigned int qr:1; /* response flag */
/* fields in fourth byte */
unsigned int rcode:4; /* response code */
unsigned int unused:2; /* unused bits */
unsigned int pr:1; /* primary server required (non standard) */
unsigned int ra:1; /* recursion available */
#else
#if defined (sun) || defined (sel) || defined (pyr) || defined (is68k) \
|| defined (tahoe) || defined (ibm032) || defined (ibm370) \
|| defined (BIT_ZERO_ON_LEFT)
/* Bit zero on left: Gould and similar architectures */
/* fields in third byte */
unsigned char qr:1; /* response flag */
unsigned char opcode:4; /* purpose of message */
unsigned char aa:1; /* authoritive answer */
unsigned char tc:1; /* truncated message */
unsigned char rd:1; /* recursion desired */
/* fields in fourth byte */
unsigned char ra:1; /* recursion available */
unsigned char pr:1; /* primary server required (non standard) */
unsigned char unused:2; /* unused bits */
unsigned char rcode:4; /* response code */
#else
#if defined (vax) || defined (BIT_ZERO_ON_RIGHT)
/* Bit zero on right: VAX */
/* fields in third byte */
unsigned char rd:1; /* recursion desired */
unsigned char tc:1; /* truncated message */
unsigned char aa:1; /* authoritive answer */
unsigned char opcode:4; /* purpose of message */
unsigned char qr:1; /* response flag */
/* fields in fourth byte */
unsigned char rcode:4; /* response code */
unsigned char unused:2; /* unused bits */
unsigned char pr:1; /* primary server required (non standard) */
unsigned char ra:1; /* recursion available */
#else
/* you must determine what the correct bit order is for your compiler */
UNDEFINED_BIT_ORDER;
#endif
#endif
#endif
/* remaining bytes */
unsigned short qdcount; /* number of question entries */
unsigned short ancount; /* number of answer entries */
unsigned short nscount; /* number of authority entries */
unsigned short arcount; /* number of resource entries */
} HEADER;
/*
* Defines for handling compressed domain names
*/
#define INDIR_MASK 0xc0
/*
* Structure for passing resource records around.
*/
#pragma pack(4) /* force on doubleword boundary */
struct rrec {
short r_zone; /* zone number */
short r_class; /* class number */
short r_type; /* type number */
unsigned long r_ttl; /* time to live */
int r_size; /* size of data area */
char *r_data; /* pointer to data */
};
#pragma pack() /* reset to default packing */
int _System dn_expand(unsigned char *, unsigned char *, unsigned char *, unsigned char *, int);
int _System dn_comp(unsigned char *, unsigned char *, int, unsigned char **, unsigned char **);
int _System dn_find(unsigned char *, unsigned char *, unsigned char **, unsigned char **);
int _System dn_skipname(unsigned char *, unsigned char *);
unsigned short _System _getshort( unsigned char *);
unsigned long _System _getlong( unsigned char *);
void _System putshort( unsigned short , unsigned char *);
void _System putlong( unsigned long , unsigned char *);
int _System res_init(void);
int _System res_mkquery(int, char *, int, int, char *, int, struct rrec *, char *, int);
int _System res_send(char *, int, char *, int);
/* char * _System p_type(int); */
/* char * _System p_class(int); */
/* char * _System p_time(u_long); */
int _System res_query(char *, int, int, u_char *, int);
int _System res_search(char *, int, int, u_char *, int);
int _System res_querydomain(char *, char *, int, int, u_char *, int);
/* char * _System hostalias( char *); */
/* extern u_short getshort(); */
/* extern u_long getlong(); */
#endif /* __NAMESER_32H */