157 lines
5.2 KiB
C
157 lines
5.2 KiB
C
/******************************************************************
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*
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* SpiderTCP BIND
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*
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* Copyright 1990 Spider Systems Limited
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*
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* RESOLV.H
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*
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******************************************************************/
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/*
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* /usr/projects/tcp/SCCS.rel3/rel/src/include/0/s.resolv.h
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* @(#)resolv.h 5.3
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*
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* Last delta created 14:05:35 3/4/91
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* This file extracted 11:19:25 3/8/91
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*
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* Modifications:
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*
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* GSS 20 Jul 90 New File
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*/
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/*
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* Copyright (c) 1983, 1987, 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that: (1) source distributions retain this entire copyright
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* notice and comment, and (2) distributions including binaries display
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* the following acknowledgement: ``This product includes software
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* developed by the University of California, Berkeley and its contributors''
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* in the documentation or other materials provided with the distribution
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* and in all advertising materials mentioning features or use of this
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* software. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#)resolv.h 5.10 (Berkeley) 6/1/90
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*/
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#ifndef _RESOLV_INCLUDED
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#define _RESOLV_INCLUDED
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/*
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* Global defines and variables for resolver stub.
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*/
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#define MAXNS 8 /* max # name servers we'll track per list */
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#define MAXNSLIST 4 /* max # name servers lists we'll track */
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#define MAXDFLSRCH 3 /* # default domain levels to try */
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#define MAXDNSRCH 6 /* max # domains in search path */
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#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
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#define RES_TIMEOUT 5 /* min. seconds between retries */
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typedef struct _ADDR_LIST {
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u_long ServerCount;
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u_long Servers[MAXNS];
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} ADDR_LIST, FAR * LPADDR_LIST;
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struct state {
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long options; /* option flags - see below. */
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int retrans; /* retransmition time interval */
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u_short retry; /* number of times to retransmit */
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u_short id; /* current packet id */
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ADDR_LIST nslist[MAXNSLIST]; /* the server lists */
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char defdname[MAXDNAME]; /* default domain */
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char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
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};
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/*
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* Resolver options
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*/
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#define RES_INIT 0x0001 /* address initialized */
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#define RES_DEBUG 0x0002 /* print debug messages */
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#define RES_AAONLY 0x0004 /* authoritative answers only */
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#define RES_USEVC 0x0008 /* use virtual circuit */
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#define RES_PRIMARY 0x0010 /* query primary server only */
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#define RES_IGNTC 0x0020 /* ignore trucation errors */
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#define RES_RECURSE 0x0040 /* recursion desired */
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#define RES_DEFNAMES 0x0080 /* use default domain name */
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#define RES_STAYOPEN 0x0100 /* Keep TCP socket open */
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#define RES_DNSRCH 0x0200 /* search up local domain tree */
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#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
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//
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// Resolver function prototypes
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//
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int
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dn_expand(
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IN unsigned char *msg,
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IN unsigned char *eomorig,
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IN unsigned char *comp_dn,
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OUT unsigned char *exp_dn,
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IN int length
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);
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int
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dn_comp(
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IN unsigned char *exp_dn,
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OUT unsigned char *comp_dn,
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IN int length,
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IN unsigned char **dnptrs, OPTIONAL
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IN OUT unsigned char **lastdnptr OPTIONAL
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);
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int
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res_init(
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void
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);
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int
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res_send(
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IN char *buf,
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IN int buflen,
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OUT char *answer,
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IN int anslen
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);
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int
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res_query(
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IN char *name, /* domain name */
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IN int class, /* class of query */
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IN int type, /* type of query */
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OUT unsigned char *answer, /* buffer to put answer */
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IN int anslen /* size of answer buffer */
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);
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int
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res_search(
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IN char *name, /* domain name */
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IN int class, /* class of query */
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IN int type, /* type of query */
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OUT unsigned char *answer, /* buffer to put answer */
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IN int anslen /* size of answer */
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);
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int
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res_mkquery(
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IN int op, // opcode of query
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IN char *dname, // domain name
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IN int class, // class of query
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IN int type, // type of query
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IN char *data, OPTIONAL // resource record data
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IN int datalen, OPTIONAL // length of data
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IN struct rrec *newrr, OPTIONAL // new rr for modify or append
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OUT char *buf, // buffer to put query
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IN int buflen // size of buffer
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);
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#endif // _RESOLV_INCLUDED
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