| 1 | /*
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| 2 | * Copyright (c) 1983, 1987, 1989 The Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms are permitted
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| 6 | * provided that: (1) source distributions retain this entire copyright
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| 7 | * notice and comment, and (2) distributions including binaries display
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| 8 | * the following acknowledgement: ``This product includes software
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| 9 | * developed by the University of California, Berkeley and its contributors''
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| 10 | * in the documentation or other materials provided with the distribution
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| 11 | * and in all advertising materials mentioning features or use of this
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| 12 | * software. Neither the name of the University nor the names of its
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| 13 | * contributors may be used to endorse or promote products derived
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| 14 | * from this software without specific prior written permission.
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| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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| 17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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| 18 | *
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| 19 | * @(#)resolv.h 5.10 (Berkeley) 6/1/90
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| 20 | */
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| 21 | #ifndef _NET__GEN__RESOLV_H
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| 22 | #define _NET__GEN__RESOLV_H
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| 23 |
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| 24 | /*
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| 25 | * Resolver configuration file.
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| 26 | * Normally not present, but may contain the address of the
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| 27 | * inital name server(s) to query and the domain search list.
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| 28 | */
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| 29 |
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| 30 | #ifndef _PATH_RESCONF
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| 31 | #define _PATH_RESCONF "/etc/resolv.conf"
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| 32 | #endif
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| 33 |
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| 34 | /*
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| 35 | * Global defines and variables for resolver stub.
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| 36 | */
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| 37 | #define MAXNS 3 /* max # name servers we'll track */
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| 38 | #define MAXDFLSRCH 3 /* # default domain levels to try */
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| 39 | #define MAXDNSRCH 6 /* max # domains in search path */
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| 40 | #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
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| 41 |
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| 42 | #define RES_TIMEOUT 5 /* min. seconds between retries */
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| 43 |
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| 44 | #define NAMESERVER_PORT 53
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| 45 |
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| 46 | struct state {
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| 47 | int retrans; /* retransmition time interval */
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| 48 | int retry; /* number of times to retransmit */
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| 49 | long options; /* option flags - see below. */
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| 50 | int nscount; /* number of name servers */
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| 51 | ipaddr_t nsaddr_list[MAXNS]; /* address of name server */
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| 52 | #define nsaddr nsaddr_list[0] /* for backward compatibility */
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| 53 | u16_t nsport_list[MAXNS]; /* port of name server */
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| 54 | u16_t id; /* current packet id */
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| 55 | char defdname[MAXDNAME]; /* default domain */
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| 56 | char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
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| 57 | };
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| 58 |
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| 59 | /*
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| 60 | * Resolver options
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| 61 | */
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| 62 | #define RES_INIT 0x0001 /* address initialized */
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| 63 | #define RES_DEBUG 0x0002 /* print debug messages */
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| 64 | #define RES_AAONLY 0x0004 /* authoritative answers only */
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| 65 | #define RES_USEVC 0x0008 /* use virtual circuit */
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| 66 | #define RES_PRIMARY 0x0010 /* query primary server only */
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| 67 | #define RES_IGNTC 0x0020 /* ignore trucation errors */
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| 68 | #define RES_RECURSE 0x0040 /* recursion desired */
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| 69 | #define RES_DEFNAMES 0x0080 /* use default domain name */
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| 70 | #define RES_STAYOPEN 0x0100 /* Keep TCP socket open */
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| 71 | #define RES_DNSRCH 0x0200 /* search up local domain tree */
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| 72 |
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| 73 | #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH )
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| 74 |
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| 75 | extern struct state _res;
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| 76 |
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| 77 | struct rrec;
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| 78 |
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| 79 | int res_init _ARGS(( void ));
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| 80 | int res_mkquery _ARGS(( int op, const char *dname, int class, int type,
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| 81 | const char *data, int datalen, const struct rrec *newrr,
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| 82 | char *buf, int buflen ));
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| 83 | int res_query _ARGS(( char *name, int class, int type, u8_t *answer,
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| 84 | int anslen ));
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| 85 | int res_querydomain _ARGS(( char *name, char *domain, int class, int type,
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| 86 | u8_t *answer, int anslen ));
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| 87 | int res_search _ARGS(( char *name, int class, int type, u8_t *answer,
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| 88 | int anslen ));
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| 89 | int res_send _ARGS(( const char *buf, int buflen, char *answer, int anslen ));
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| 90 | void _res_close _ARGS(( void ));
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| 91 |
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| 92 | int dn_comp _ARGS(( const u8_t *exp_dn, u8_t *comp_dn, int length,
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| 93 | u8_t **dnptrs, u8_t **lastdnptr ));
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| 94 | int dn_expand _ARGS(( const u8_t *msg, const u8_t *eomorig,
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| 95 | const u8_t *comp_dn, u8_t *exp_dn, int length ));
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| 96 | int dn_skipname _ARGS(( const u8_t *comp_dn, const u8_t *eom ));
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| 97 |
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| 98 | char *__hostalias _ARGS(( const char *name ));
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| 99 |
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| 100 | u16_t _getshort _ARGS(( const u8_t *msgp ));
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| 101 | u32_t _getlong _ARGS(( const u8_t *msgp ));
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| 102 | void __putshort _ARGS(( U16_t s, u8_t *msgp ));
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| 103 | void __putlong _ARGS(( u32_t l, u8_t *msgp ));
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| 104 |
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| 105 | void p_query _ARGS(( char *msg ));
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| 106 |
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| 107 | #endif /* _NET__GEN__RESOLV_H */
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