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      1 /*
      2  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
      3  * Use is subject to license terms.
      4  */
      5 
      6 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
      7 /*	  All Rights Reserved  	*/
      8 
      9 /*
     10  * Copyright (c) 1983, 1987 Regents of the University of California.
     11  * All rights reserved.  The Berkeley software License Agreement
     12  * specifies the terms and conditions for redistribution.
     13  */
     14 
     15 /*
     16  * Global defines and variables for resolver stub.
     17  */
     18 
     19 #ifndef _RESOLV_H
     20 #define	_RESOLV_H
     21 
     22 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     23 
     24 #include <sys/types.h>
     25 #include <netinet/in.h>
     26 
     27 #ifdef __cplusplus
     28 extern "C" {
     29 #endif
     30 
     31 #define	ADDRSORT	1		/* enable the address-sorting option */
     32 #define	MAXADDR		10		/* max # addresses to sort by */
     33 
     34 #define	MAXDNAME	256
     35 #define	MAXNS		3		/* max # name servers we'll track */
     36 #define	MAXDNSRCH	3		/* max # default domain levels to try */
     37 #define	LOCALDOMAINPARTS 2		/* min levels in name that is "local" */
     38 
     39 #define	RES_TIMEOUT	6		/* seconds between retries */
     40 
     41 struct state {
     42 	int	retrans;		/* retransmition time interval */
     43 	int	retry;			/* number of times to retransmit */
     44 	int	options;		/* option flags - see below. */
     45 	int	nscount;		/* number of name servers */
     46 	struct	sockaddr_in nsaddr_list[MAXNS];	/* address of name server */
     47 #define	nsaddr	nsaddr_list[0]		/* for backward compatibility */
     48 	ushort_t id;			/* current packet id */
     49 	char	defdname[MAXDNAME];	/* default domain */
     50 	char	*dnsrch[MAXDNSRCH+1];	/* components of domain to search */
     51 	int	ascount;		/* number of addresses */
     52 	struct  in_addr sort_list[MAXADDR]; /* address sorting list */
     53 };
     54 
     55 /*
     56  * Resolver options
     57  */
     58 #define	RES_INIT	0x0001		/* address initialized */
     59 #define	RES_DEBUG	0x0002		/* print debug messages */
     60 #define	RES_AAONLY	0x0004		/* authoritative answers only */
     61 #define	RES_USEVC	0x0008		/* use virtual circuit */
     62 #define	RES_PRIMARY	0x0010		/* query primary server only */
     63 #define	RES_IGNTC	0x0020		/* ignore trucation errors */
     64 #define	RES_RECURSE	0x0040		/* recursion desired */
     65 #define	RES_DEFNAMES	0x0080		/* use default domain name */
     66 #define	RES_STAYOPEN	0x0100		/* Keep TCP socket open */
     67 #define	RES_DNSRCH	0x0200		/* search up local domain tree */
     68 
     69 #define	RES_DEFAULT	(RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
     70 
     71 extern struct state _res;
     72 extern char *p_cdname(), *p_rr(), *p_type(), *p_class();
     73 
     74 #ifdef	__cplusplus
     75 }
     76 #endif
     77 
     78 #endif /* _RESOLV_H */
     79 
     80