usr/src/lib/libresolv/resolv.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * Portions of this source code were derived from Berkeley 4.3 BSD
  32  * under license from the Regents of the University of California.
  33  */
  34
  35 /*
  36  * Global defines and variables for resolver stub.
  37  */
  38
  39 #ifndef _RESOLV_H
  40 #define _RESOLV_H
  41
  42 #include <stdio.h>
  43
  44 #ifdef  __cplusplus
  45 extern "C" {
  46 #endif
  47
  48 /*
  49  * Resolver configuration file.
  50  * Normally not present, but may contain the address of the
  51  * inital name server(s) to query and the domain search list.
  52  */
  53
  54 #ifndef _PATH_RESCONF
  55 #define _PATH_RESCONF   "/etc/resolv.conf"
  56 #endif
  57
  58 #define ADDRSORT        1               /* enable the address-sorting option */
  59 #define MAXADDR         10              /* max # addresses to sort by */
  60
  61 #define MAXNS           3               /* max # name servers we'll track */
  62 #define MAXDFLSRCH      3               /* # default domain levels to try */
  63 #define MAXDNSRCH       6               /* max # default domain levels to try */
  64 #define LOCALDOMAINPARTS 2              /* min levels in name that is "local" */
  65
  66 #define RES_TIMEOUT     6               /* seconds between retries */
  67
  68 struct state {
  69         int     retrans;                /* retransmition time interval */
  70         int     retry;                  /* number of times to retransmit */
  71         long    options;                /* option flags - see below. */
  72         int     nscount;                /* number of name servers */
  73         struct  sockaddr_in nsaddr_list[MAXNS]; /* address of name server */
  74 #define nsaddr  nsaddr_list[0]          /* for backward compatibility */
  75         u_short id;                     /* current packet id */
  76         char    defdname[MAXDNAME];     /* default domain */
  77         char    *dnsrch[MAXDNSRCH+1];   /* components of domain to search */
  78         int     ascount;                /* number of addresses */
  79         struct  in_addr sort_list[MAXADDR]; /* address sorting list */
  80 };
  81
  82 /*
  83  * Resolver options
  84  */
  85 #define RES_INIT        0x0001          /* address initialized */
  86 #define RES_DEBUG       0x0002          /* print debug messages */
  87 #define RES_AAONLY      0x0004          /* authoritative answers only */
  88 #define RES_USEVC       0x0008          /* use virtual circuit */
  89 #define RES_PRIMARY     0x0010          /* query primary server only */
  90 #define RES_IGNTC       0x0020          /* ignore trucation errors */
  91 #define RES_RECURSE     0x0040          /* recursion desired */
  92 #define RES_DEFNAMES    0x0080          /* use default domain name */
  93 #define RES_STAYOPEN    0x0100          /* Keep TCP socket open */
  94 #define RES_DNSRCH      0x0200          /* search up local domain tree */
  95
  96 #define RES_DEFAULT     (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
  97
  98 extern struct state _res;
  99
 100 #ifdef __STDC__
 101 extern char *p_cdname(char *, char *, FILE *);
 102 extern char *p_rr(char *, char *, FILE *);
 103 extern char *p_type(int);
 104 extern char *p_class(int);
 105 extern char *p_time(unsigned long);
 106 #else
 107 extern char *p_cdname(), *p_rr(), *p_type(), *p_class(), *p_time();
 108 #endif  /* __STDC__ */
 109
 110 #ifdef  __cplusplus
 111 }
 112 #endif
 113
 114 #endif  /* _RESOLV_H */