| 1 | |
| 2 | /* |
| 3 | * Copyright (c) 1983, 1987 Regents of the University of California. |
| 4 | * All rights reserved. The Berkeley software License Agreement |
| 5 | * specifies the terms and conditions for redistribution. |
| 6 | * |
| 7 | * @(#)resolv.h 5.5 (Berkeley) %G% |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * Global defines and variables for resolver stub. |
| 12 | */ |
| 13 | |
| 14 | |
| 15 | #define MAXNS 3 /* max # name servers we'll track */ |
| 16 | #define MAXDNSRCH 3 /* max # default domain levels to try */ |
| 17 | #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ |
| 18 | |
| 19 | #define RES_TIMEOUT 4 /* seconds between retries */ |
| 20 | |
| 21 | struct state { |
| 22 | int retrans; /* retransmition time interval */ |
| 23 | int retry; /* number of times to retransmit */ |
| 24 | long options; /* option flags - see below. */ |
| 25 | int nscount; /* number of name servers */ |
| 26 | struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */ |
| 27 | #define nsaddr nsaddr_list[0] /* for backward compatibility */ |
| 28 | u_short id; /* current packet id */ |
| 29 | char defdname[MAXDNAME]; /* default domain */ |
| 30 | char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ |
| 31 | }; |
| 32 | |
| 33 | /* |
| 34 | * Resolver options |
| 35 | */ |
| 36 | #define RES_INIT 0x0001 /* address initialized */ |
| 37 | #define RES_DEBUG 0x0002 /* print debug messages */ |
| 38 | #define RES_AAONLY 0x0004 /* authoritative answers only */ |
| 39 | #define RES_USEVC 0x0008 /* use virtual circuit */ |
| 40 | #define RES_PRIMARY 0x0010 /* query primary server only */ |
| 41 | #define RES_IGNTC 0x0020 /* ignore trucation errors */ |
| 42 | #define RES_RECURSE 0x0040 /* recursion desired */ |
| 43 | #define RES_DEFNAMES 0x0080 /* use default domain name */ |
| 44 | #define RES_STAYOPEN 0x0100 /* Keep TCP socket open */ |
| 45 | #define RES_DNSRCH 0x0200 /* search up local domain tree */ |
| 46 | |
| 47 | #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) |
| 48 | |
| 49 | extern struct state _res; |
| 50 | extern char *p_cdname(), *p_rr(), *p_type(), *p_class(); |