107 lines
4 KiB
C
107 lines
4 KiB
C
/*
|
|
* Copyright (c) 1983, 1987, 1989 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms are permitted
|
|
* provided that: (1) source distributions retain this entire copyright
|
|
* notice and comment, and (2) distributions including binaries display
|
|
* the following acknowledgement: ``This product includes software
|
|
* developed by the University of California, Berkeley and its contributors''
|
|
* in the documentation or other materials provided with the distribution
|
|
* and in all advertising materials mentioning features or use of this
|
|
* software. Neither the name of the University nor the names of its
|
|
* contributors may 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 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* @(#)resolv.h 5.10 (Berkeley) 6/1/90
|
|
*/
|
|
#ifndef _NET__GEN__RESOLV_H
|
|
#define _NET__GEN__RESOLV_H
|
|
|
|
/*
|
|
* Resolver configuration file.
|
|
* Normally not present, but may contain the address of the
|
|
* inital name server(s) to query and the domain search list.
|
|
*/
|
|
|
|
#ifndef _PATH_RESCONF
|
|
#define _PATH_RESCONF "/etc/resolv.conf"
|
|
#endif
|
|
|
|
/*
|
|
* Global defines and variables for resolver stub.
|
|
*/
|
|
#define MAXNS 3 /* max # name servers we'll track */
|
|
#define MAXDFLSRCH 3 /* # default domain levels to try */
|
|
#define MAXDNSRCH 6 /* max # domains in search path */
|
|
#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
|
|
|
|
#define RES_TIMEOUT 5 /* min. seconds between retries */
|
|
|
|
#define NAMESERVER_PORT 53
|
|
|
|
struct state {
|
|
int retrans; /* retransmition time interval */
|
|
int retry; /* number of times to retransmit */
|
|
long options; /* option flags - see below. */
|
|
int nscount; /* number of name servers */
|
|
ipaddr_t nsaddr_list[MAXNS]; /* address of name server */
|
|
#define nsaddr nsaddr_list[0] /* for backward compatibility */
|
|
u16_t nsport_list[MAXNS]; /* port of name server */
|
|
u16_t id; /* current packet id */
|
|
char defdname[MAXDNAME]; /* default domain */
|
|
char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
|
|
};
|
|
|
|
/*
|
|
* Resolver options
|
|
*/
|
|
#define RES_INIT 0x0001 /* address initialized */
|
|
#define RES_DEBUG 0x0002 /* print debug messages */
|
|
#define RES_AAONLY 0x0004 /* authoritative answers only */
|
|
#define RES_USEVC 0x0008 /* use virtual circuit */
|
|
#define RES_PRIMARY 0x0010 /* query primary server only */
|
|
#define RES_IGNTC 0x0020 /* ignore trucation errors */
|
|
#define RES_RECURSE 0x0040 /* recursion desired */
|
|
#define RES_DEFNAMES 0x0080 /* use default domain name */
|
|
#define RES_STAYOPEN 0x0100 /* Keep TCP socket open */
|
|
#define RES_DNSRCH 0x0200 /* search up local domain tree */
|
|
|
|
#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH )
|
|
|
|
extern struct state _res;
|
|
|
|
struct rrec;
|
|
|
|
int res_init _ARGS(( void ));
|
|
int res_mkquery _ARGS(( int op, const char *dname, int class, int type,
|
|
const char *data, int datalen, const struct rrec *newrr,
|
|
char *buf, int buflen ));
|
|
int res_query _ARGS(( char *name, int class, int type, u8_t *answer,
|
|
int anslen ));
|
|
int res_querydomain _ARGS(( char *name, char *domain, int class, int type,
|
|
u8_t *answer, int anslen ));
|
|
int res_search _ARGS(( char *name, int class, int type, u8_t *answer,
|
|
int anslen ));
|
|
int res_send _ARGS(( const char *buf, int buflen, char *answer, int anslen ));
|
|
void _res_close _ARGS(( void ));
|
|
|
|
int dn_comp _ARGS(( const u8_t *exp_dn, u8_t *comp_dn, int length,
|
|
u8_t **dnptrs, u8_t **lastdnptr ));
|
|
int dn_expand _ARGS(( const u8_t *msg, const u8_t *eomorig,
|
|
const u8_t *comp_dn, u8_t *exp_dn, int length ));
|
|
int dn_skipname _ARGS(( const u8_t *comp_dn, const u8_t *eom ));
|
|
|
|
char *__hostalias _ARGS(( const char *name ));
|
|
|
|
u16_t _getshort _ARGS(( const u8_t *msgp ));
|
|
u32_t _getlong _ARGS(( const u8_t *msgp ));
|
|
void __putshort _ARGS(( U16_t s, u8_t *msgp ));
|
|
void __putlong _ARGS(( u32_t l, u8_t *msgp ));
|
|
|
|
void p_query _ARGS(( char *msg ));
|
|
|
|
#endif /* _NET__GEN__RESOLV_H */
|