source: trunk/src/emx/include/resolv.h@ 1971

Last change on this file since 1971 was 1739, checked in by bird, 21 years ago

Fixed TCPCALL.
  • Property cvs2svn:cvs-rev set to 1.6
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 12.9 KB
Line 
1/* resolv.h,v 1.5 2004/09/14 22:27:35 bird Exp */
2/** @file
3 * BSD
4 * @changed EM: For EMX by hv 1994,1996
5 * @changed bird: For IGCC.
6 */
7/*
8 * Copyright (c) 1983, 1987, 1989 The Regents of the University of California.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * from: @(#)resolv.h 5.15 (Berkeley) 4/3/91
40 * resolv.h,v 1.5 2004/09/14 22:27:35 bird Exp
41 */
42
43#ifndef _RESOLV_H_
44#define _RESOLV_H_
45
46
47#if defined (__cplusplus)
48extern "C" {
49#endif
50
51/* toolkit includes a bunch of headers */
52#ifndef TCPV40HDRS
53#include <sys/param.h>
54#include <types.h>
55#include <sys/cdefs.h>
56#include <stdio.h>
57
58
59/*
60 * Revision information. This is the release date in YYYYMMDD format.
61 * It can change every day so the right thing to do with it is use it
62 * in preprocessor commands such as "#if (__RES > 19931104)". Do not
63 * compare for equality; rather, use it to determine whether your resolver
64 * is new enough to contain a certain feature.
65 */
66
67#define __RES 19960801
68
69/*
70 * Resolver configuration file.
71 * Normally not present, but may contain the address of the
72 * inital name server(s) to query and the domain search list.
73 */
74
75#ifndef _PATH_RESCONF
76#define _PATH_RESCONF "/@unixroot/etc/resolv.conf"
77#endif
78#endif /* TCPV40HDRS */
79
80/*
81 * Global defines and variables for resolver stub.
82 */
83#define MAXNS 3 /* max # name servers we'll track */
84#define MAXDFLSRCH 3 /* # default domain levels to try */
85#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
86#define RES_TIMEOUT 4 /* min. seconds between retries */
87#ifdef TCPV40HDRS
88#define MAXDNSRCH 3 /* max # domains in search path */
89#else
90#define MAXDNSRCH 6 /* max # domains in search path */
91#define MAXRESOLVSORT 10 /* number of net to sort on */
92#define RES_MAXNDOTS 15 /* should reflect bit field size */
93#endif
94
95
96#ifdef TCPV40HDRS
97
98#pragma pack(4)
99struct state {
100 int retrans; /* retransmition time interval */
101 int retry; /* number of times to retransmit */
102 long options; /* option flags - see below. */
103 int nscount; /* number of name servers */
104 struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */
105#define nsaddr nsaddr_list[0] /* for backward compatibility */
106 u_short id; /* current packet id */
107 char defdname[MAXDNAME]; /* default domain */
108 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
109};
110#pragma pack()
111
112#else
113
114#pragma pack(4)
115struct __res_state {
116 int retrans; /* retransmition time interval */
117 int retry; /* number of times to retransmit */
118 u_long options; /* option flags - see below. */
119 int nscount; /* number of name servers */
120 struct sockaddr_in
121 nsaddr_list[MAXNS]; /* address of name server */
122#define nsaddr nsaddr_list[0] /* for backward compatibility */
123 u_short id; /* current message id */
124 char defdname[256]; /* default domain (deprecated) */
125 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
126 u_long pfcode; /* RES_PRF_ flags - see below. */
127 unsigned ndots:4; /* threshold for initial abs. query */
128 unsigned nsort:4; /* number of elements in sort_list[] */
129 char unused[3];
130 struct {
131 struct in_addr addr;
132 u_int32_t mask;
133 } sort_list[MAXRESOLVSORT];
134 char pad[72]; /* on an i386 this means 512b total */
135};
136#pragma pack()
137
138#endif
139
140/*
141 * Resolver options
142 */
143#define RES_INIT 0x0001 /* address initialized */
144#define RES_DEBUG 0x0002 /* print debug messages */
145#define RES_AAONLY 0x0004 /* authoritative answers only */
146#define RES_USEVC 0x0008 /* use virtual circuit */
147#define RES_PRIMARY 0x0010 /* query primary server only */
148#define RES_IGNTC 0x0020 /* ignore trucation errors */
149#define RES_RECURSE 0x0040 /* recursion desired */
150#define RES_DEFNAMES 0x0080 /* use default domain name */
151#define RES_STAYOPEN 0x0100 /* Keep TCP socket open */
152#define RES_DNSRCH 0x0200 /* search up local domain tree */
153#ifndef TCPV40HDRS
154#define RES_INSECURE1 0x00000400 /* type 1 security disabled */
155#define RES_INSECURE2 0x00000800 /* type 2 security disabled */
156#define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
157#define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */
158#endif
159
160#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
161
162
163
164#ifdef TCPV40HDRS
165
166extern struct state _res;
167
168#else /* !TCPV40HDRS: */
169
170/*
171 * Resolver "pfcode" values. Used by dig.
172 */
173#define RES_PRF_STATS 0x00000001
174/* 0x00000002 */
175#define RES_PRF_CLASS 0x00000004