108 lines
4 KiB
C
108 lines
4 KiB
C
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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 _NET__GEN__RESOLV_H
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#define _NET__GEN__RESOLV_H
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/*
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* Resolver configuration file.
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* Normally not present, but may contain the address of the
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* inital name server(s) to query and the domain search list.
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*/
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#ifndef _PATH_RESCONF
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#define _PATH_RESCONF "/etc/resolv.conf"
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#endif
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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 3 /* max # name servers 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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#define NAMESERVER_PORT 53
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struct state {
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int retrans; /* retransmition time interval */
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int retry; /* number of times to retransmit */
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long options; /* option flags - see below. */
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int nscount; /* number of name servers */
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ipaddr_t nsaddr_list[MAXNS]; /* address of name server */
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#define nsaddr nsaddr_list[0] /* for backward compatibility */
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u16_t nsport_list[MAXNS]; /* port of name server */
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u16_t id; /* current packet id */
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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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extern struct state _res;
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struct rrec;
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int res_init _ARGS(( void ));
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int res_mkquery _ARGS(( int op, const char *dname, int class, int type,
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const char *data, int datalen, const struct rrec *newrr,
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char *buf, int buflen ));
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int res_query _ARGS(( char *name, int class, int type, u8_t *answer,
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int anslen ));
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int res_querydomain _ARGS(( char *name, char *domain, int class, int type,
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u8_t *answer, int anslen ));
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int res_search _ARGS(( char *name, int class, int type, u8_t *answer,
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int anslen ));
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int res_send _ARGS(( const char *buf, int buflen, char *answer, int anslen ));
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void _res_close _ARGS(( void ));
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int dn_comp _ARGS(( const u8_t *exp_dn, u8_t *comp_dn, int length,
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u8_t **dnptrs, u8_t **lastdnptr ));
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int dn_expand _ARGS(( const u8_t *msg, const u8_t *eomorig,
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const u8_t *comp_dn, u8_t *exp_dn, int length ));
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int dn_skipname _ARGS(( const u8_t *comp_dn, const u8_t *eom ));
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char *__hostalias _ARGS(( const char *name ));
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u16_t _getshort _ARGS(( const u8_t *msgp ));
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u32_t _getlong _ARGS(( const u8_t *msgp ));
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void __putshort _ARGS(( U16_t s, u8_t *msgp ));
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void __putlong _ARGS(( u32_t l, u8_t *msgp ));
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void p_query _ARGS(( char *msg ));
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#endif /* _NET__GEN__RESOLV_H */
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