| 1 | /* resolv.h,v 1.5 2004/09/14 22:27:35 bird Exp */
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| 2 | /** @file
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| 3 | * BSD
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| 4 | * @changed EM: For EMX by hv 1994,1996
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| 5 | * @changed bird: For IGCC.
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| 6 | */
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| 7 | /*
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| 8 | * Copyright (c) 1983, 1987, 1989 The Regents of the University of California.
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| 9 | * All rights reserved.
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| 10 | *
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| 11 | * Redistribution and use in source and binary forms, with or without
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| 12 | * modification, are permitted provided that the following conditions
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| 13 | * are met:
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| 14 | * 1. Redistributions of source code must retain the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer.
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| 16 | * 2. Redistributions in binary form must reproduce the above copyright
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| 17 | * notice, this list of conditions and the following disclaimer in the
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| 18 | * documentation and/or other materials provided with the distribution.
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| 19 | * 3. All advertising materials mentioning features or use of this software
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| 20 | * must display the following acknowledgement:
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| 21 | * This product includes software developed by the University of
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| 22 | * California, Berkeley and its contributors.
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| 23 | * 4. Neither the name of the University nor the names of its contributors
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| 24 | * may be used to endorse or promote products derived from this software
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| 25 | * without specific prior written permission.
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| 26 | *
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| 27 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 37 | * SUCH DAMAGE.
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| 38 | *
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| 39 | * from: @(#)resolv.h 5.15 (Berkeley) 4/3/91
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| 40 | * resolv.h,v 1.5 2004/09/14 22:27:35 bird Exp
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| 41 | */
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| 42 |
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| 43 | #ifndef _RESOLV_H_
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| 44 | #define _RESOLV_H_
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| 45 |
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| 46 |
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| 47 | #if defined (__cplusplus)
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| 48 | extern "C" {
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| 49 | #endif
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| 50 |
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| 51 | /* toolkit includes a bunch of headers */
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| 52 | #ifndef TCPV40HDRS
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| 53 | #include <sys/param.h>
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| 54 | #include <types.h>
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| 55 | #include <sys/cdefs.h>
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| 56 | #include <stdio.h>
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| 57 |
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| 58 |
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| 59 | /*
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| 60 | * Revision information. This is the release date in YYYYMMDD format.
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| 61 | * It can change every day so the right thing to do with it is use it
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| 62 | * in preprocessor commands such as "#if (__RES > 19931104)". Do not
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| 63 | * compare for equality; rather, use it to determine whether your resolver
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| 64 | * is new enough to contain a certain feature.
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| 65 | */
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| 66 |
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| 67 | #define __RES 19960801
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| 68 |
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| 69 | /*
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| 70 | * Resolver configuration file.
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| 71 | * Normally not present, but may contain the address of the
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| 72 | * inital name server(s) to query and the domain search list.
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| 73 | */
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| 74 |
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| 75 | #ifndef _PATH_RESCONF
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| 76 | #define _PATH_RESCONF "/@unixroot/etc/resolv.conf"
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| 77 | #endif
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| 78 | #endif /* TCPV40HDRS */
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| 79 |
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| 80 | /*
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| 81 | * Global defines and variables for resolver stub.
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| 82 | */
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| 83 | #define MAXNS 3 /* max # name servers we'll track */
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| 84 | #define MAXDFLSRCH 3 /* # default domain levels to try */
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| 85 | #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
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| 86 | #define RES_TIMEOUT 4 /* min. seconds between retries */
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| 87 | #ifdef TCPV40HDRS
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| 88 | #define MAXDNSRCH 3 /* max # domains in search path */
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| 89 | #else
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| 90 | #define MAXDNSRCH 6 /* max # domains in search path */
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| 91 | #define MAXRESOLVSORT 10 /* number of net to sort on */
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| 92 | #define RES_MAXNDOTS 15 /* should reflect bit field size */
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| 93 | #endif
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| 94 |
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| 95 |
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| 96 | #ifdef TCPV40HDRS
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| 97 |
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| 98 | #pragma pack(4)
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| 99 | struct state {
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| 100 | int retrans; /* retransmition time interval */
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| 101 | int retry; /* number of times to retransmit */
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| 102 | long options; /* option flags - see below. */
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| 103 | int nscount; /* number of name servers */
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| 104 | struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */
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| 105 | #define nsaddr nsaddr_list[0] /* for backward compatibility */
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| 106 | u_short id; /* current packet id */
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| 107 | char defdname[MAXDNAME]; /* default domain */
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| 108 | char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
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| 109 | };
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| 110 | #pragma pack()
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| 111 |
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| 112 | #else
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| 113 |
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| 114 | #pragma pack(4)
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| 115 | struct __res_state {
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| 116 | int retrans; /* retransmition time interval */
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| 117 | int retry; /* number of times to retransmit */
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| 118 | u_long options; /* option flags - see below. */
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| 119 | int nscount; /* number of name servers */
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| 120 | struct sockaddr_in
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| 121 | nsaddr_list[MAXNS]; /* address of name server */
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| 122 | #define nsaddr nsaddr_list[0] /* for backward compatibility */
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| 123 | u_short id; /* current message id */
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| 124 | char defdname[256]; /* default domain (deprecated) */
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| 125 | char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
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| 126 | u_long pfcode; /* RES_PRF_ flags - see below. */
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| 127 | unsigned ndots:4; /* threshold for initial abs. query */
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| 128 | unsigned nsort:4; /* number of elements in sort_list[] */
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| 129 | char unused[3];
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| 130 | struct {
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| 131 | struct in_addr addr;
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| 132 | u_int32_t mask;
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| 133 | } sort_list[MAXRESOLVSORT];
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| 134 | char pad[72]; /* on an i386 this means 512b total */
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| 135 | };
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| 136 | #pragma pack()
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| 137 |
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| 138 | #endif
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| 139 |
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| 140 | /*
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| 141 | * Resolver options
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| 142 | */
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| 143 | #define RES_INIT 0x0001 /* address initialized */
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| 144 | #define RES_DEBUG 0x0002 /* print debug messages */
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| 145 | #define RES_AAONLY 0x0004 /* authoritative answers only */
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| 146 | #define RES_USEVC 0x0008 /* use virtual circuit */
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| 147 | #define RES_PRIMARY 0x0010 /* query primary server only */
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| 148 | #define RES_IGNTC 0x0020 /* ignore trucation errors */
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| 149 | #define RES_RECURSE 0x0040 /* recursion desired */
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| 150 | #define RES_DEFNAMES 0x0080 /* use default domain name */
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| 151 | #define RES_STAYOPEN 0x0100 /* Keep TCP socket open */
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| 152 | #define RES_DNSRCH 0x0200 /* search up local domain tree */
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| 153 | #ifndef TCPV40HDRS
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| 154 | #define RES_INSECURE1 0x00000400 /* type 1 security disabled */
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| 155 | #define RES_INSECURE2 0x00000800 /* type 2 security disabled */
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| 156 | #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */
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| 157 | #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */
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| 158 | #endif
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| 159 |
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| 160 | #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
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| 161 |
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| 162 |
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| 163 |
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| 164 | #ifdef TCPV40HDRS
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| 165 |
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| 166 | extern struct state _res;
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| 167 |
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| 168 | #else /* !TCPV40HDRS: */
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| 169 |
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| 170 | /*
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| 171 | * Resolver "pfcode" values. Used by dig.
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| 172 | */
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| 173 | #define RES_PRF_STATS 0x00000001
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| 174 | /* 0x00000002 */
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| 175 | #define RES_PRF_CLASS 0x00000004
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| 176 | #define RES_PRF_CMD 0x00000008
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| 177 | #define RES_PRF_QUES 0x00000010
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| 178 | #define RES_PRF_ANS 0x00000020
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| 179 | #define RES_PRF_AUTH 0x00000040
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| 180 | #define RES_PRF_ADD 0x00000080
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| 181 | #define RES_PRF_HEAD1 0x00000100
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| 182 | #define RES_PRF_HEAD2 0x00000200
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| 183 | #define RES_PRF_TTLID 0x00000400
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| 184 | #define RES_PRF_HEADX 0x00000800
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| 185 | #define RES_PRF_QUERY 0x00001000
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| 186 | #define RES_PRF_REPLY 0x00002000
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| 187 | #define RES_PRF_INIT 0x00004000
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| 188 | /* 0x00008000 */
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| 189 |
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| 190 | /* hooks are still experimental as of 4.9.2 */
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| 191 | typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
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| 192 | res_sendhookact;
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| 193 |
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| 194 | #ifndef TCPCALL
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| 195 | #define TCPCALL _System
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| 196 | #endif
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| 197 |
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| 198 | typedef res_sendhookact (* TCPCALL res_send_qhook)(struct sockaddr_in * const *ns,
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| 199 | const u_char **query,
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| 200 | int *querylen,
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| 201 | u_char *ans,
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| 202 | int anssiz,
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| 203 | int *resplen);
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| 204 |
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| 205 | typedef res_sendhookact (* TCPCALL res_send_rhook)(const struct sockaddr_in *ns,
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| 206 | const u_char *query,
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| 207 | int querylen,
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| 208 | u_char *ans,
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| 209 | int anssiz,
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| 210 | int *resplen);
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| 211 |
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| 212 | #pragma pack(4)
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| 213 | struct res_sym {
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| 214 | int number; /* Identifying number, like T_MX */
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| 215 | char * name; /* Its symbolic name, like "MX" */
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| 216 | char * humanname; /* Its fun name, like "mail exchanger" */
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| 217 | };
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| 218 | #pragma pack()
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| 219 |
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| 220 | extern struct __res_state _ress[2];
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| 221 | extern const struct res_sym __p_class_syms[];
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| 222 | extern const struct res_sym __p_type_syms[];
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| 223 | #define _res (_ress[0])
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| 224 |
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| 225 | /* Private routines shared between libc/net, named, nslookup and others. */
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| 226 | #define res_hnok __res_hnok
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| 227 | #define res_ownok __res_ownok
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| 228 | #define res_mailok __res_mailok
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| 229 | #define res_dnok __res_dnok
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| 230 | #define sym_ston __sym_ston
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| 231 | #define sym_ntos __sym_ntos
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| 232 | #define sym_ntop __sym_ntop
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| 233 | #define b64_ntop __b64_ntop
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| 234 | #define b64_pton __b64_pton
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| 235 | #define loc_ntoa __loc_ntoa
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| 236 | #define loc_aton __loc_aton
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| 237 | #define dn_skipname __dn_skipname
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| 238 | #define fp_resstat __fp_resstat
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| 239 | #define fp_query __fp_query
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| 240 | #define fp_nquery __fp_nquery
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| 241 | #define hostalias __hostalias
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| 242 | #define putlong __putlong
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| 243 | #define putshort __putshort
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| 244 | #define p_class __p_class
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| 245 | #define p_time __p_time
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| 246 | #define p_type __p_type
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| 247 | #define p_query __p_query
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| 248 | #define p_cdnname __p_cdnname
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| 249 | #define p_cdname __p_cdname
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| 250 | #define p_fqnname __p_fqnname
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| 251 | #define p_fqname __p_fqname
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| 252 | #define p_rr __p_rr
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| 253 | #define p_option __p_option
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| 254 | #define p_secstodate __p_secstodate
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| 255 | #define dn_count_labels __dn_count_labels
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| 256 | #define dn_comp __dn_comp
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| 257 | #define dn_expand __dn_expand
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| 258 | #define res_init __res_init
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| 259 | #define res_randomid __res_randomid
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| 260 | #define res_query __res_query
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| 261 | #define res_search __res_search
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| 262 | #define res_querydomain __res_querydomain
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| 263 | #define res_mkquery __res_mkquery
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| 264 | #define res_send __res_send
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| 265 | #define res_isourserver __res_isourserver
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| 266 | #define res_nameinquery __res_nameinquery
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| 267 | #define res_queriesmatch __res_queriesmatch
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| 268 | #define res_close __res_close
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| 269 |
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| 270 | int TCPCALL res_hnok(const char *);
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| 271 | int TCPCALL res_ownok(const char *);
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| 272 | int TCPCALL res_mailok(const char *);
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| 273 | int TCPCALL res_dnok(const char *);
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| 274 | int TCPCALL sym_ston(const struct res_sym *, char *, int *);
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| 275 | const char * TCPCALL sym_ntos(const struct res_sym *, int, int *);
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| 276 | const char * TCPCALL sym_ntop(const struct res_sym *, int, int *);
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| 277 | int TCPCALL b64_ntop(u_char const *, size_t, char *, size_t);
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| 278 | int TCPCALL b64_pton(char const *, u_char *, size_t);
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| 279 | int TCPCALL loc_aton(const char *, u_char *);
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| 280 | const char * TCPCALL loc_ntoa(const u_char *, char *);
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| 281 | int TCPCALL dn_skipname(const u_char *, const u_char *);
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| 282 | void TCPCALL fp_resstat(struct __res_state *, int);
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| 283 | void TCPCALL fp_query(const u_char *, int);
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| 284 | void TCPCALL fp_nquery(const u_char *, int, int);
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| 285 | const char * TCPCALL hostalias(const char *);
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| 286 | void TCPCALL putlong(u_int32_t, u_char *);
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| 287 | void TCPCALL putshort(u_int16_t, u_char *);
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| 288 | const char * TCPCALL p_class(int);
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| 289 | const char * TCPCALL p_time(u_int32_t);
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| 290 | const char * TCPCALL p_type(int);
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| 291 | void TCPCALL p_query(const u_char *);
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| 292 | const u_char * TCPCALL p_cdnname(const u_char *, const u_char *, int, int);
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| 293 | const u_char * TCPCALL p_cdname(const u_char *, const u_char *, int);
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| 294 | const u_char * TCPCALL p_fqnname(const u_char *cp, const u_char *msg,
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| 295 | int, char *, int);
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| 296 | const u_char * TCPCALL p_fqname(const u_char *, const u_char *, int);
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| 297 | const u_char * TCPCALL p_rr(const u_char *, const u_char *, int);
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| 298 | const char * TCPCALL p_option(u_long option);
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| 299 | char * TCPCALL p_secstodate(u_long);
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| 300 | int TCPCALL dn_count_labels(char *);
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| 301 | int TCPCALL dn_comp(const char *, u_char *, int,
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| 302 | u_char **, u_char **);
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| 303 | int TCPCALL dn_expand(const u_char *, const u_char *, const u_char *,
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| 304 | char *, int);
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| 305 | int TCPCALL res_init(void);
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| 306 | u_int TCPCALL res_randomid(void);
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| 307 | int TCPCALL res_query(const char *, int, int, u_char *, int);
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| 308 | int TCPCALL res_search(const char *, int, int, u_char *, int);
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| 309 | int TCPCALL res_querydomain(const char *, const char *, int, int, u_char *, int);
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| 310 | int TCPCALL res_mkquery(int, const char *, int, int, const u_char *, int,
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| 311 | const u_char *, u_char *, int);
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| 312 | int TCPCALL res_send(const u_char *, int, u_char *, int);
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| 313 | int TCPCALL res_isourserver(const struct sockaddr_in *);
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| 314 | int TCPCALL res_nameinquery(const char *, int, int,
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| 315 | const u_char *, const u_char *);
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| 316 | int TCPCALL res_queriesmatch(const u_char *, const u_char *,
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| 317 | const u_char *, const u_char *);
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| 318 | void TCPCALL res_close(void);
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| 319 | int TCPCALL dn_find(u_char *exp_dn, u_char *msg,
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| 320 | u_char **dnptrs, u_char **lastdnptr);
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| 321 | #endif /* !TCPV40HDRS */
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| 322 |
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| 323 |
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| 324 | #if defined (__cplusplus)
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| 325 | }
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| 326 | #endif
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| 327 |
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| 328 | #endif /* !_RESOLV_H_ */
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