Use balloc to extend Ifile.

[unix-history] / usr / src / include / resolv.h

/*
 * Copyright (c) 1983, 1987, 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)resolv.h	5.15 (Berkeley) %G%
 */

#ifndef _RESOLV_H_
#define	_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 */

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 */
	struct	sockaddr_in nsaddr_list[MAXNS];	/* address of name server */
#define	nsaddr	nsaddr_list[0]		/* for backward compatibility */
	u_short	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;

#include <sys/cdefs.h>
#include <stdio.h>

/* Private routines shared between libc/net, named, nslookup and others. */
#define	dn_skipname	__dn_skipname
#define	fp_query	__fp_query
#define	hostalias	__hostalias
#define	putlong		__putlong
#define	putshort	__putshort
#define p_class		__p_class
#define p_time		__p_time
#define p_type		__p_type
__BEGIN_DECLS
int	 __dn_skipname __P((const u_char *, const u_char *));
void	 __fp_query __P((char *, FILE *));
char	*__hostalias __P((const char *));
void	 __putlong __P((u_long, u_char *));
void	 __putshort __P((u_short, u_char *));
char	*__p_class __P((int));
char	*__p_time __P((u_long));
char	*__p_type __P((int));

int	 dn_comp __P((const u_char *, u_char *, int, u_char **, u_char **));
int	 dn_expand __P((const u_char *, const u_char *, const u_char *,
		u_char *, int));
int	 res_init __P((void));
int	 res_mkquery __P((int, const char *, int, int, const char *, int,
		const struct rrec *, char *, int));
int	 res_send __P((const char *, int, char *, int));
__END_DECLS

#endif /* !_RESOLV_H_ */