117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
/*
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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 _RESOLVE_H
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#define _RESOLVE_H
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#include <traditional.h>
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#include <sys/types.h>
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#include <netinet/in.h> /* struct sockaddr_in declaration */
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#include <arpa/nameser.h> /* MAXDNAME definition */
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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_ETC
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#define __PATH_ETC "/usr/etc/inet"
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#endif
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#ifndef _PATH_RESCONF
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#define _PATH_RESCONF __PATH_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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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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struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */
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#define nsaddr nsaddr_list[0] /* for backward compatibility */
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u_short 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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extern int h_errno;
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#ifdef __cplusplus
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extern "C" {
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#endif
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int res_query _ARGS ((const char *__dname, int __class, int __type,
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u_char *__answer, int __anslen));
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int res_search _ARGS ((const char *__dname, int __class, int __type,
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u_char *__answer, int __anslen));
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int res_mkquery _ARGS ((int __op, const char *__dname, int __class, int __type,
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char *__data, int __datalen, struct rrec *__newrr, char *__buf,
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int __buflen));
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int res_querydomain _ARGS ((const char *__name, const char *__domain,
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int __class, int __type, u_char *__answer, int __anslen));
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int res_send _ARGS ((const char *__msg, int __msglen, char *__answer,
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int __anslen));
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int res_init _ARGS ((void));
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int dn_comp _ARGS ((u_char *__exp_dn, u_char *__comp_dn, int __length,
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u_char **__dnptrs, u_char **__lastdnptr));
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int dn_expand _ARGS ((u_char *__msg, u_char *__eomorig, u_char *__comp_dn,
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u_char *__exp_dn, int __length));
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int dn_skipname _ARGS ((u_char *__comp_dn, u_char *__eom));
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void herror _ARGS((char *__s));
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RESOLVE_H */
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