/* * 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 *//* * 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	53struct 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 ));