| 1 | /* |
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| 2 | * Copyright (c) 1983, 1987, 1989 |
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| 3 | * The Regents of the University of California. All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 3. Neither the name of the University nor the names of its contributors |
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| 14 | * may be used to endorse or promote products derived from this software |
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| 15 | * without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 27 | * SUCH DAMAGE. |
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| 28 | */ |
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| 29 | |
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| 30 | /* |
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| 31 | * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") |
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| 32 | * Portions Copyright (c) 1996-1999 by Internet Software Consortium. |
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| 33 | * |
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| 34 | * Permission to use, copy, modify, and distribute this software for any |
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| 35 | * purpose with or without fee is hereby granted, provided that the above |
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| 36 | * copyright notice and this permission notice appear in all copies. |
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| 37 | * |
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| 38 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
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| 39 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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| 40 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR |
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| 41 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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| 42 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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| 43 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
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| 44 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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| 45 | */ |
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| 46 | |
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| 47 | /*% |
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| 48 | * @(#)resolv.h 8.1 (Berkeley) 6/2/93 |
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| 49 | * $FreeBSD: release/9.0.0/include/resolv.h 203964 2010-02-16 19:39:50Z imp $ |
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| 50 | */ |
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| 51 | |
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| 52 | #ifndef _RESOLV_H_ |
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| 53 | #define _RESOLV_H_ |
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| 54 | |
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| 55 | #include <sys/param.h> |
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| 56 | #include <sys/types.h> |
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| 57 | #include <sys/cdefs.h> |
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| 58 | #include <stdio.h> |
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| 59 | #include <netinet/in.h> /* struct in_addr */ |
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| 60 | |
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| 61 | /*% |
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| 62 | * Revision information. This is the release date in YYYYMMDD format. |
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| 63 | * It can change every day so the right thing to do with it is use it |
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| 64 | * in preprocessor commands such as "#if (__RES > 19931104)". Do not |
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| 65 | * compare for equality; rather, use it to determine whether your resolver |
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| 66 | * is new enough to contain a certain feature. |
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| 67 | */ |
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| 68 | |
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| 69 | #define __RES 19960801 |
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| 70 | |
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| 71 | /*% |
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| 72 | * Resolver configuration file. |
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| 73 | * Normally not present, but may contain the address of the |
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| 74 | * initial name server(s) to query and the domain search list. |
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| 75 | */ |
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| 76 | |
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| 77 | #ifndef _PATH_RESCONF |
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| 78 | #define _PATH_RESCONF "/etc/resolv.conf" |
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| 79 | #endif |
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| 80 | |
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| 81 | typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } |
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| 82 | res_sendhookact; |
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| 83 | |
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| 84 | typedef res_sendhookact (*res_send_qhook)(struct sockaddr_in * const *ns, |
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| 85 | const u_char **query, |
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| 86 | int *querylen, |
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| 87 | u_char *ans, |
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| 88 | int anssiz, |
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| 89 | int *resplen); |
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| 90 | |
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| 91 | typedef res_sendhookact (*res_send_rhook)(const struct sockaddr_in *ns, |
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| 92 | const u_char *query, |
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| 93 | int querylen, |
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| 94 | u_char *ans, |
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| 95 | int anssiz, |
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| 96 | int *resplen); |
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| 97 | |
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| 98 | struct res_sym { |
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| 99 | int number; /*%< Identifying number, like T_MX */ |
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| 100 | const char * name; /*%< Its symbolic name, like "MX" */ |
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| 101 | const char * humanname; /*%< Its fun name, like "mail exchanger" */ |
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| 102 | }; |
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| 103 | |
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| 104 | /*% |
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| 105 | * Global defines and variables for resolver stub. |
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| 106 | */ |
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| 107 | #define MAXNS 3 /*%< max # name servers we'll track */ |
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| 108 | #define MAXDFLSRCH 3 /*%< # default domain levels to try */ |
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| 109 | #define MAXDNSRCH 6 /*%< max # domains in search path */ |
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| 110 | #define LOCALDOMAINPARTS 2 /*%< min levels in name that is "local" */ |
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| 111 | #define RES_TIMEOUT 5 /*%< min. seconds between retries */ |
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| 112 | #define MAXRESOLVSORT 10 /*%< number of net to sort on */ |
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| 113 | #define RES_MAXNDOTS 15 /*%< should reflect bit field size */ |
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| 114 | |
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| 115 | struct __res_state { |
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| 116 | int retrans; /*%< retransmission 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 *dnsrch[MAXDNSRCH+1]; /*%< components of domain to search */ |
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| 125 | char defdname[256]; /*%< default domain (deprecated) */ |
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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 | |
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| 137 | typedef struct __res_state *res_state; |
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| 138 | |
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| 139 | /*% |
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| 140 | * Resolver options (keep these in synch with res_debug.c, please) |
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| 141 | */ |
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| 142 | #define RES_INIT 0x00000001 /*%< address initialized */ |
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| 143 | #define RES_DEBUG 0x00000002 /*%< print debug messages */ |
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| 144 | #define RES_AAONLY 0x00000004 /*%< authoritative answers only (!IMPL)*/ |
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| 145 | #define RES_USEVC 0x00000008 /*%< use virtual circuit */ |
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| 146 | #define RES_PRIMARY 0x00000010 /*%< query primary server only (!IMPL) */ |
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| 147 | #define RES_IGNTC 0x00000020 /*%< ignore truncation errors */ |
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| 148 | #define RES_RECURSE 0x00000040 /*%< recursion desired */ |
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| 149 | #define RES_DEFNAMES 0x00000080 /*%< use default domain name */ |
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| 150 | #define RES_STAYOPEN 0x00000100 /*%< Keep TCP socket open */ |
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| 151 | #define RES_DNSRCH 0x00000200 /*%< search up local domain tree */ |
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| 152 | #define RES_INSECURE1 0x00000400 /*%< type 1 security disabled */ |
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| 153 | #define RES_INSECURE2 0x00000800 /*%< type 2 security disabled */ |
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| 154 | #define RES_NOALIASES 0x00001000 /*%< shuts off HOSTALIASES feature */ |
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| 155 | #define RES_USE_INET6 0x00002000 /*%< use/map IPv6 in gethostbyname() */ |
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| 156 | #define RES_NOTLDQUERY 0x00004000 /*%< Don't query TLD names */ |
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| 157 | |
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| 158 | #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | \ |
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| 159 | RES_DNSRCH) |
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| 160 | |
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| 161 | /*% |
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| 162 | * Resolver "pfcode" values. Used by dig. |
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| 163 | */ |
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| 164 | #define RES_PRF_STATS 0x00000001 |
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| 165 | #define RES_PRF_UPDATE 0x00000002 |
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| 166 | #define RES_PRF_CLASS 0x00000004 |
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| 167 | #define RES_PRF_CMD 0x00000008 |
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| 168 | #define RES_PRF_QUES 0x00000010 |
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| 169 | #define RES_PRF_ANS 0x00000020 |
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| 170 | #define RES_PRF_AUTH 0x00000040 |
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| 171 | #define RES_PRF_ADD 0x00000080 |
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| 172 | #define RES_PRF_HEAD1 0x00000100 |
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| 173 | #define RES_PRF_HEAD2 0x00000200 |
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| 174 | #define RES_PRF_TTLID 0x00000400 |
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| 175 | #define RES_PRF_HEADX 0x00000800 |
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| 176 | #define RES_PRF_QUERY 0x00001000 |
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| 177 | #define RES_PRF_REPLY 0x00002000 |
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| 178 | #define RES_PRF_INIT 0x00004000 |
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| 179 | /* 0x00008000 */ |
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| 180 | |
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| 181 | #define fp_nquery __fp_nquery |
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| 182 | #define fp_query __fp_query |
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| 183 | #define hostalias __hostalias |
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| 184 | #define p_query __p_query |
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| 185 | #define res_close __res_close |
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| 186 | #define res_init __res_init |
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| 187 | #define res_isourserver __res_isourserver |
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| 188 | #define res_mkquery __res_mkquery |
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| 189 | #define res_query __res_query |
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| 190 | #define res_querydomain __res_querydomain |
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| 191 | #define res_search __res_search |
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| 192 | #define res_send __res_send |
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| 193 | |
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| 194 | __BEGIN_DECLS |
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| 195 | void fp_nquery(const u_char *, int, FILE *); |
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| 196 | void fp_query(const u_char *, FILE *); |
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| 197 | const char * hostalias(const char *); |
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| 198 | void p_query(const u_char *); |
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| 199 | void res_close(void); |
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| 200 | int res_init(void); |
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| 201 | int res_isourserver(const struct sockaddr_in *); |
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| 202 | int res_mkquery(int, const char *, int, int, const u_char *, |
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| 203 | int, const u_char *, u_char *, int); |
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| 204 | int res_query(const char *, int, int, u_char *, int); |
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| 205 | int res_querydomain(const char *, const char *, int, int, |
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| 206 | u_char *, int); |
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| 207 | int res_search(const char *, int, int, u_char *, int); |
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| 208 | int res_send(const u_char *, int, u_char *, int); |
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| 209 | __END_DECLS |
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| 210 | |
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| 211 | extern struct __res_state _res; |
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| 212 | |
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| 213 | |
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| 214 | extern const struct res_sym __p_class_syms[]; |
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| 215 | extern const struct res_sym __p_type_syms[]; |
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| 216 | |
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| 217 | /* Private routines shared between libc/net, named, nslookup and others. */ |
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| 218 | #define b64_ntop __b64_ntop |
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| 219 | #define b64_pton __b64_pton |
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| 220 | #define dn_comp __dn_comp |
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| 221 | #define dn_count_labels __dn_count_labels |
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| 222 | #define dn_expand __dn_expand |
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| 223 | #define dn_skipname __dn_skipname |
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| 224 | #define fp_resstat __fp_resstat |
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| 225 | #define loc_aton __loc_aton |
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| 226 | #define loc_ntoa __loc_ntoa |
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| 227 | #define p_cdname __p_cdname |
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| 228 | #define p_cdnname __p_cdnname |
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| 229 | #define fp_resstat __fp_resstat |
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| 230 | #define p_class __p_class |
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| 231 | #define p_fqname __p_fqname |
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| 232 | #define p_fqnname __p_fqnname |
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| 233 | #define p_option __p_option |
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| 234 | #define p_secstodate __p_secstodate |
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| 235 | #define p_section __p_section |
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| 236 | #define p_time __p_time |
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| 237 | #define p_type __p_type |
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| 238 | #define putlong __putlong |
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| 239 | #define putshort __putshort |
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| 240 | #define res_dnok __res_dnok |
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| 241 | #define res_hnok __res_hnok |
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| 242 | #define res_mailok __res_mailok |
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| 243 | #define res_nameinquery __res_nameinquery |
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| 244 | #define res_ownok __res_ownok |
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| 245 | #define res_queriesmatch __res_queriesmatch |
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| 246 | #define res_randomid __res_randomid |
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| 247 | #define sym_ntop __sym_ntop |
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| 248 | #define sym_ntos __sym_ntos |
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| 249 | #define sym_ston __sym_ston |
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| 250 | #define res_send_setqhook __res_send_setqhook |
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| 251 | #define res_send_setrhook __res_send_setrhook |
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| 252 | #define res_mkupdate __res_mkupdate |
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| 253 | #define res_mkupdrec __res_mkupdrec |
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| 254 | #define res_freeupdrec __res_freeupdrec |
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| 255 | |
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| 256 | __BEGIN_DECLS |
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| 257 | int res_hnok(const char *); |
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| 258 | int res_ownok(const char *); |
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| 259 | int res_mailok(const char *); |
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| 260 | int res_dnok(const char *); |
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| 261 | int sym_ston(const struct res_sym *, const char *, int *); |
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| 262 | const char * sym_ntos(const struct res_sym *, int, int *); |
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| 263 | const char * sym_ntop(const struct res_sym *, int, int *); |
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| 264 | int b64_ntop(u_char const *, size_t, char *, size_t); |
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| 265 | int b64_pton(char const *, u_char *, size_t); |
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| 266 | int loc_aton(const char *, u_char *); |
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| 267 | const char * loc_ntoa(const u_char *, char *); |
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| 268 | int dn_skipname(const u_char *, const u_char *); |
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| 269 | void fp_resstat(struct __res_state *, FILE *); |
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| 270 | void putlong(u_int32_t, u_char *); |
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| 271 | void putshort(u_int16_t, u_char *); |
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| 272 | const char * p_class(int); |
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| 273 | const char * p_time(u_int32_t); |
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| 274 | const char * p_type(int); |
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| 275 | const u_char * p_cdnname(const u_char *, const u_char *, int, FILE *); |
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| 276 | const u_char * p_cdname(const u_char *, const u_char *, FILE *); |
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| 277 | const u_char * p_fqnname(const u_char *, const u_char *, int, char *, int); |
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| 278 | const u_char * p_fqname(const u_char *, const u_char *, FILE *); |
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| 279 | const char * p_option(u_long); |
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| 280 | char * p_secstodate(u_long); |
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| 281 | int dn_count_labels(const char *); |
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| 282 | int dn_comp(const char *, u_char *, int, u_char **, u_char **); |
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| 283 | int dn_expand(const u_char *, const u_char *, const u_char *, |
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| 284 | char *, int); |
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| 285 | u_int res_randomid(void); |
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| 286 | int res_nameinquery(const char *, int, int, const u_char *, |
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| 287 | const u_char *); |
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| 288 | int res_queriesmatch(const u_char *, const u_char *, |
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| 289 | const u_char *, const u_char *); |
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| 290 | const char * p_section(int, int); |
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| 291 | void res_send_setqhook(res_send_qhook); |
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| 292 | void res_send_setrhook(res_send_rhook); |
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| 293 | |
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| 294 | /* XXX The following depend on the ns_updrec typedef in arpa/nameser.h */ |
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| 295 | #ifdef _ARPA_NAMESER_H_ |
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| 296 | int res_update (ns_updrec *); |
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| 297 | int res_mkupdate (ns_updrec *, u_char *, int); |
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| 298 | ns_updrec * res_mkupdrec (int, const char *, u_int, u_int, u_long); |
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| 299 | void res_freeupdrec (ns_updrec *); |
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| 300 | #endif |
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| 301 | __END_DECLS |
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| 302 | |
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| 303 | #endif /* !_RESOLV_H_ */ |
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