1 | /*- |
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2 | * Copyright (c) 1983, 1987, 1989, 1993 |
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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. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | */ |
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33 | |
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34 | /* |
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35 | * Portions Copyright (c) 1996 by Internet Software Consortium. |
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36 | * |
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37 | * Permission to use, copy, modify, and distribute this software for any |
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38 | * purpose with or without fee is hereby granted, provided that the above |
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39 | * copyright notice and this permission notice appear in all copies. |
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40 | * |
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41 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS |
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42 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES |
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43 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE |
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44 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
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45 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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46 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
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47 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
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48 | * SOFTWARE. |
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49 | */ |
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50 | |
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51 | /* |
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52 | * @(#)resolv.h 8.1 (Berkeley) 6/2/93 |
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53 | * From Id: resolv.h,v 8.12 1998/04/28 19:36:46 halley Exp $ |
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54 | * $Id$ |
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55 | */ |
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56 | |
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57 | #ifndef _RESOLV_H_ |
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58 | #define _RESOLV_H_ |
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59 | |
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60 | #include <sys/param.h> |
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61 | #include <sys/types.h> |
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62 | #include <rtems/bsd/sys/cdefs.h> |
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63 | #include <stdio.h> |
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64 | |
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65 | /* |
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66 | * Revision information. This is the release date in YYYYMMDD format. |
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67 | * It can change every day so the right thing to do with it is use it |
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68 | * in preprocessor commands such as "#if (__RES > 19931104)". Do not |
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69 | * compare for equality; rather, use it to determine whether your resolver |
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70 | * is new enough to contain a certain feature. |
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71 | */ |
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72 | |
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73 | #define __RES 19960801 |
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74 | |
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75 | /* |
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76 | * This used to be defined in res_query.c, now it's in herror.c. It was |
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77 | * never extern'd by any *.h file before it was placed here. herror.c is |
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78 | * part of libresolv.a even though it might make more sense in libnetdb.a |
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79 | * or even libnet.a. |
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80 | */ |
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81 | |
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82 | extern int h_errno; |
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83 | |
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84 | /* |
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85 | * Resolver configuration file. |
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86 | * Normally not present, but may contain the address of the |
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87 | * initial name server(s) to query and the domain search list. |
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88 | */ |
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89 | |
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90 | #ifndef _PATH_RESCONF |
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91 | #define _PATH_RESCONF "/etc/resolv.conf" |
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92 | #endif |
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93 | |
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94 | /* |
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95 | * Global defines and variables for resolver stub. |
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96 | */ |
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97 | #define MAXNS 3 /* max # name servers we'll track */ |
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98 | #define MAXDFLSRCH 3 /* # default domain levels to try */ |
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99 | #define MAXDNSRCH 6 /* max # domains in search path */ |
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100 | #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ |
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101 | |
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102 | #define RES_TIMEOUT 5 /* min. seconds between retries */ |
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103 | #define MAXRESOLVSORT 10 /* number of net to sort on */ |
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104 | #define RES_MAXNDOTS 15 /* should reflect bit field size */ |
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105 | |
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106 | struct __res_state { |
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107 | int retrans; /* retransmission time interval */ |
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108 | int retry; /* number of times to retransmit */ |
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109 | u_long options; /* option flags - see below. */ |
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110 | int nscount; /* number of name servers */ |
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111 | struct sockaddr_in |
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112 | nsaddr_list[MAXNS]; /* address of name server */ |
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113 | #define nsaddr nsaddr_list[0] /* for backward compatibility */ |
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114 | u_short id; /* current message id */ |
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115 | char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ |
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116 | char defdname[256]; /* default domain (deprecated) */ |
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117 | u_long pfcode; /* RES_PRF_ flags - see below. */ |
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118 | unsigned ndots:4; /* threshold for initial abs. query */ |
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119 | unsigned nsort:4; /* number of elements in sort_list[] */ |
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120 | char unused[3]; |
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121 | struct { |
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122 | struct in_addr addr; |
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123 | u_int32_t mask; |
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124 | } sort_list[MAXRESOLVSORT]; |
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125 | char pad[72]; /* on an i386 this means 512b total */ |
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126 | }; |
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127 | |
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128 | /* |
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129 | * Resolver options (keep these in synch with res_debug.c, please) |
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130 | */ |
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131 | #define RES_INIT 0x00000001 /* address initialized */ |
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132 | #define RES_DEBUG 0x00000002 /* print debug messages */ |
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133 | #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ |
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134 | #define RES_USEVC 0x00000008 /* use virtual circuit */ |
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135 | #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ |
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136 | #define RES_IGNTC 0x00000020 /* ignore truncation errors */ |
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137 | #define RES_RECURSE 0x00000040 /* recursion desired */ |
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138 | #define RES_DEFNAMES 0x00000080 /* use default domain name */ |
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139 | #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ |
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140 | #define RES_DNSRCH 0x00000200 /* search up local domain tree */ |
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141 | #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ |
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142 | #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ |
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143 | #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ |
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144 | #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ |
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145 | #define RES_NOTLDQUERY 0x00004000 /* Don't query TLD names */ |
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146 | |
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147 | #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH) |
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148 | |
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149 | /* |
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150 | * Resolver "pfcode" values. Used by dig. |
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151 | */ |
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152 | #define RES_PRF_STATS 0x00000001 |
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153 | #define RES_PRF_UPDATE 0x00000002 |
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154 | #define RES_PRF_CLASS 0x00000004 |
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155 | #define RES_PRF_CMD 0x00000008 |
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156 | #define RES_PRF_QUES 0x00000010 |
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157 | #define RES_PRF_ANS 0x00000020 |
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158 | #define RES_PRF_AUTH 0x00000040 |
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159 | #define RES_PRF_ADD 0x00000080 |
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160 | #define RES_PRF_HEAD1 0x00000100 |
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161 | #define RES_PRF_HEAD2 0x00000200 |
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162 | #define RES_PRF_TTLID 0x00000400 |
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163 | #define RES_PRF_HEADX 0x00000800 |
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164 | #define RES_PRF_QUERY 0x00001000 |
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165 | #define RES_PRF_REPLY 0x00002000 |
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166 | #define RES_PRF_INIT 0x00004000 |
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167 | /* 0x00008000 */ |
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168 | |
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169 | typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } |
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170 | res_sendhookact; |
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171 | |
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172 | typedef res_sendhookact (*res_send_qhook)(struct sockaddr_in * const *ns, |
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173 | const u_char **query, |
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174 | int *querylen, |
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175 | u_char *ans, |
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176 | int anssiz, |
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177 | int *resplen); |
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178 | |
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179 | typedef res_sendhookact (*res_send_rhook)(const struct sockaddr_in *ns, |
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180 | const u_char *query, |
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181 | int querylen, |
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182 | u_char *ans, |
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183 | int anssiz, |
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184 | int *resplen); |
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185 | |
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186 | struct res_sym { |
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187 | int number; /* Identifying number, like T_MX */ |
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188 | char * name; /* Its symbolic name, like "MX" */ |
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189 | char * humanname; /* Its fun name, like "mail exchanger" */ |
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190 | }; |
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191 | |
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192 | extern struct __res_state _res; |
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193 | extern const struct res_sym __p_class_syms[]; |
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194 | extern const struct res_sym __p_type_syms[]; |
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195 | |
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196 | /* Private routines shared between libc/net, named, nslookup and others. */ |
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197 | #define res_hnok __res_hnok |
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198 | #define res_ownok __res_ownok |
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199 | #define res_mailok __res_mailok |
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200 | #define res_dnok __res_dnok |
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201 | #define sym_ston __sym_ston |
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202 | #define sym_ntos __sym_ntos |
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203 | #define sym_ntop __sym_ntop |
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204 | #define b64_ntop __b64_ntop |
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205 | #define b64_pton __b64_pton |
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206 | #define loc_ntoa __loc_ntoa |
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207 | #define loc_aton __loc_aton |
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208 | #define fp_resstat __fp_resstat |
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209 | #define p_query __p_query |
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210 | #define dn_skipname __dn_skipname |
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211 | #define fp_resstat __fp_resstat |
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212 | #define fp_query __fp_query |
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213 | #define fp_nquery __fp_nquery |
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214 | #define hostalias __hostalias |
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215 | #define putlong __putlong |
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216 | #define putshort __putshort |
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217 | #define p_class __p_class |
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218 | #define p_time __p_time |
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219 | #define p_type __p_type |
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220 | #define p_query __p_query |
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221 | #define p_cdnname __p_cdnname |
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222 | #define p_section __p_section |
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223 | #define p_cdname __p_cdname |
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224 | #define p_fqnname __p_fqnname |
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225 | #define p_fqname __p_fqname |
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226 | #define p_option __p_option |
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227 | #define p_secstodate __p_secstodate |
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228 | #define dn_count_labels __dn_count_labels |
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229 | #define dn_comp __dn_comp |
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230 | #define dn_expand __dn_expand |
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231 | #define res_init __res_init |
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232 | #define res_randomid __res_randomid |
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233 | #define res_query __res_query |
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234 | #define res_search __res_search |
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235 | #define res_querydomain __res_querydomain |
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236 | #define res_mkquery __res_mkquery |
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237 | #define res_send __res_send |
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238 | #define res_isourserver __res_isourserver |
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239 | #define res_nameinquery __res_nameinquery |
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240 | #define res_queriesmatch __res_queriesmatch |
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241 | #define res_close __res_close |
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242 | #define res_mkupdate __res_mkupdate |
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243 | #define res_mkupdrec __res_mkupdrec |
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244 | #define res_freeupdrec __res_freeupdrec |
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245 | |
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246 | __BEGIN_DECLS |
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247 | int res_hnok (const char *); |
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248 | int res_ownok (const char *); |
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249 | int res_mailok (const char *); |
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250 | int res_dnok (const char *); |
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251 | int sym_ston (const struct res_sym *, const char *, int *); |
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252 | const char * sym_ntos (const struct res_sym *, int, int *); |
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253 | const char * sym_ntop (const struct res_sym *, int, int *); |
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254 | int b64_ntop (u_char const *, size_t, char *, size_t); |
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255 | int b64_pton (char const *, u_char *, size_t); |
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256 | int loc_aton (const char *, u_char *); |
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257 | const char * loc_ntoa (const u_char *, char *); |
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258 | int dn_skipname (const u_char *, const u_char *); |
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259 | void fp_resstat (struct __res_state *, FILE *); |
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260 | void fp_query (const u_char *, FILE *); |
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261 | void fp_nquery (const u_char *, int, FILE *); |
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262 | const char * hostalias (const char *); |
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263 | void putlong (u_int32_t, u_char *); |
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264 | void putshort (u_int16_t, u_char *); |
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265 | const char * p_class (int); |
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266 | const char * p_time (u_int32_t); |
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267 | const char * p_type (int); |
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268 | void p_query (const u_char *); |
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269 | const u_char * p_cdnname (const u_char *, const u_char *, int, FILE *); |
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270 | const u_char * p_cdname (const u_char *, const u_char *, FILE *); |
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271 | const u_char * p_fqnname (const u_char *, const u_char *, |
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272 | int, char *, int); |
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273 | const u_char * p_fqname (const u_char *, const u_char *, FILE *); |
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274 | const char * p_option (u_long); |
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275 | char * p_secstodate (u_long); |
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276 | int dn_count_labels (const char *); |
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277 | int dn_comp (const char *, u_char *, int, |
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278 | u_char **, u_char **); |
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279 | int dn_expand (const u_char *, const u_char *, const u_char *, |
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280 | char *, int); |
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281 | int res_init (void); |
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282 | u_int res_randomid (void); |
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283 | int res_query (const char *, int, int, u_char *, int); |
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284 | int res_search (const char *, int, int, u_char *, int); |
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285 | int res_querydomain (const char *, const char *, int, int, |
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286 | u_char *, int); |
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287 | int res_mkquery (int, const char *, int, int, const u_char *, |
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288 | int, const u_char *, u_char *, int); |
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289 | int res_send (const u_char *, int, u_char *, int); |
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290 | int res_isourserver (const struct sockaddr_in *); |
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291 | int res_nameinquery (const char *, int, int, |
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292 | const u_char *, const u_char *); |
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293 | int res_queriesmatch (const u_char *, const u_char *, |
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294 | const u_char *, const u_char *); |
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295 | void res_close (void); |
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296 | const char * p_section (int, int); |
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297 | /* XXX The following depend on the ns_updrec typedef in arpa/nameser.h */ |
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298 | #ifdef _ARPA_NAMESER_H_ |
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299 | int res_update (ns_updrec *); |
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300 | int res_mkupdate (ns_updrec *, u_char *, int); |
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301 | ns_updrec * res_mkupdrec (int, const char *, u_int, u_int, u_long); |
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302 | void res_freeupdrec (ns_updrec *); |
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303 | #endif |
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304 | __END_DECLS |
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305 | |
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306 | #endif /* !_RESOLV_H_ */ |
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