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0094000 /*
0094001 * Copyright (c) 1983, 1987, 1989 The Regents of the University of California.
0094002 * All rights reserved.
0094003 *
0094004 * Redistribution and use in source and binary forms are permitted
0094005 * provided that: (1) source distributions retain this entire copyright
0094006 * notice and comment, and (2) distributions including binaries display
0094007 * the following acknowledgement: ``This product includes software
0094008 * developed by the University of California, Berkeley and its contributors''
0094009 * in the documentation or other materials provided with the distribution
0094010 * and in all advertising materials mentioning features or use of this
0094011 * software. Neither the name of the University nor the names of its
0094012 * contributors may be used to endorse or promote products derived
0094013 * from this software without specific prior written permission.
0094014 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
0094015 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
0094016 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
0094017 *
0094018 * @(#)resolv.h 5.10 (Berkeley) 6/1/90
0094019 */
0094020 #ifndef _NET__GEN__RESOLV_H
0094021 #define _NET__GEN__RESOLV_H
0094022
0094023 /*
0094024 * Resolver configuration file.
0094025 * Normally not present, but may contain the address of the
0094026 * inital name server(s) to query and the domain search list.
0094027 */
0094028
0094029 #ifndef _PATH_RESCONF
0094030 #define _PATH_RESCONF "/etc/resolv.conf"
0094031 #endif
0094032
0094033 /*
0094034 * Global defines and variables for resolver stub.
0094035 */
0094036 #define MAXNS 3 /* max # name servers we'll track */
0094037 #define MAXDFLSRCH 3 /* # default domain levels to try */
0094038 #define MAXDNSRCH 6 /* max # domains in search path */
0094039 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
0094040
0094041 #define RES_TIMEOUT 5 /* min. seconds between retries */
0094042
0094043 #define NAMESERVER_PORT 53
0094044
0094045 struct state {
0094046 int retrans; /* retransmition time interval */
0094047 int retry; /* number of times to retransmit */
0094048 long options; /* option flags - see below. */
0094049 int nscount; /* number of name servers */
0094050 ipaddr_t nsaddr_list[MAXNS]; /* address of name server */
0094051 #define nsaddr nsaddr_list[0] /* for backward compatibility */
0094052 u16_t nsport_list[MAXNS]; /* port of name server */
0094053 u16_t id; /* current packet id */
0094054 char defdname[MAXDNAME]; /* default domain */
0094055 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
0094056 };
0094057
0094058 /*
0094059 * Resolver options
0094060 */
0094061 #define RES_INIT 0x0001 /* address initialized */
0094062 #define RES_DEBUG 0x0002 /* print debug messages */
0094063 #define RES_AAONLY 0x0004 /* authoritative answers only */
0094064 #define RES_USEVC 0x0008 /* use virtual circuit */
0094065 #define RES_PRIMARY 0x0010 /* query primary server only */
0094066 #define RES_IGNTC 0x0020 /* ignore trucation errors */
0094067 #define RES_RECURSE 0x0040 /* recursion desired */
0094068 #define RES_DEFNAMES 0x0080 /* use default domain name */
0094069 #define RES_STAYOPEN 0x0100 /* Keep TCP socket open */
0094070 #define RES_DNSRCH 0x0200 /* search up local domain tree */
0094071
0094072 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH )
0094073
0094074 extern struct state _res;
0094075
0094076 struct rrec;
0094077
0094078 int res_init _ARGS(( void ));
0094079 int res_mkquery _ARGS(( int op, const char *dname, int class, int type,
0094080 const char *data, int datalen, const struct rrec *newrr,
0094081 char *buf, int buflen ));
0094082 int res_query _ARGS(( char *name, int class, int type, u8_t *answer,
0094083 int anslen ));
0094084 int res_querydomain _ARGS(( char *name, char *domain, int class, int type,
0094085 u8_t *answer, int anslen ));
0094086 int res_search _ARGS(( char *name, int class, int type, u8_t *answer,
0094087 int anslen ));
0094088 int res_send _ARGS(( const char *buf, int buflen, char *answer, int anslen ));
0094089 void _res_close _ARGS(( void ));
0094090
0094091 int dn_comp _ARGS(( const u8_t *exp_dn, u8_t *comp_dn, int length,
0094092 u8_t **dnptrs, u8_t **lastdnptr ));
0094093 int dn_expand _ARGS(( const u8_t *msg, const u8_t *eomorig,
0094094 const u8_t *comp_dn, u8_t *exp_dn, int length ));
0094095 int dn_skipname _ARGS(( const u8_t *comp_dn, const u8_t *eom ));
0094096
0094097 char *__hostalias _ARGS(( const char *name ));
0094098
0094099 u16_t _getshort _ARGS(( const u8_t *msgp ));
0094100 u32_t _getlong _ARGS(( const u8_t *msgp ));
0094101 void __putshort _ARGS(( U16_t s, u8_t *msgp ));
0094102 void __putlong _ARGS(( u32_t l, u8_t *msgp ));
0094103
0094104 void p_query _ARGS(( char *msg ));
0094105
0094106 #endif /* _NET__GEN__RESOLV_H */