1 | /*
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2 | * Copyright (c) 1995 - 2002 Kungliga Tekniska Högskolan
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3 | * (Royal Institute of Technology, Stockholm, Sweden).
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4 | * All rights reserved.
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5 | *
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6 | * Redistribution and use in source and binary forms, with or without
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7 | * modification, are permitted provided that the following conditions
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8 | * are met:
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9 | *
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10 | * 1. Redistributions of source code must retain the above copyright
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11 | * notice, this list of conditions and the following disclaimer.
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12 | *
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13 | * 2. Redistributions in binary form must reproduce the above copyright
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14 | * notice, this list of conditions and the following disclaimer in the
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15 | * documentation and/or other materials provided with the distribution.
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16 | *
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17 | * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 | /* $Id$ */
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35 |
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36 | #ifndef __RESOLVE_H__
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37 | #define __RESOLVE_H__
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38 |
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39 | #ifndef ROKEN_LIB_FUNCTION
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40 | #ifdef _WIN32
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41 | #define ROKEN_LIB_FUNCTION
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42 | #define ROKEN_LIB_CALL __cdecl
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43 | #else
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44 | #define ROKEN_LIB_FUNCTION
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45 | #define ROKEN_LIB_CALL
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46 | #endif
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47 | #endif
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48 |
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49 | enum {
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50 | rk_ns_c_in = 1
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51 | };
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52 |
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53 | enum {
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54 | rk_ns_t_invalid = 0, /* Cookie. */
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55 | rk_ns_t_a = 1, /* Host address. */
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56 | rk_ns_t_ns = 2, /* Authoritative server. */
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57 | rk_ns_t_md = 3, /* Mail destination. */
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58 | rk_ns_t_mf = 4, /* Mail forwarder. */
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59 | rk_ns_t_cname = 5, /* Canonical name. */
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60 | rk_ns_t_soa = 6, /* Start of authority zone. */
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61 | rk_ns_t_mb = 7, /* Mailbox domain name. */
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62 | rk_ns_t_mg = 8, /* Mail group member. */
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63 | rk_ns_t_mr = 9, /* Mail rename name. */
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64 | rk_ns_t_null = 10, /* Null resource record. */
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65 | rk_ns_t_wks = 11, /* Well known service. */
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66 | rk_ns_t_ptr = 12, /* Domain name pointer. */
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67 | rk_ns_t_hinfo = 13, /* Host information. */
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68 | rk_ns_t_minfo = 14, /* Mailbox information. */
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69 | rk_ns_t_mx = 15, /* Mail routing information. */
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70 | rk_ns_t_txt = 16, /* Text strings. */
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71 | rk_ns_t_rp = 17, /* Responsible person. */
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72 | rk_ns_t_afsdb = 18, /* AFS cell database. */
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73 | rk_ns_t_x25 = 19, /* X_25 calling address. */
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74 | rk_ns_t_isdn = 20, /* ISDN calling address. */
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75 | rk_ns_t_rt = 21, /* Router. */
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76 | rk_ns_t_nsap = 22, /* NSAP address. */
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77 | rk_ns_t_nsap_ptr = 23, /* Reverse NSAP lookup (deprecated). */
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78 | rk_ns_t_sig = 24, /* Security signature. */
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79 | rk_ns_t_key = 25, /* Security key. */
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80 | rk_ns_t_px = 26, /* X.400 mail mapping. */
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81 | rk_ns_t_gpos = 27, /* Geographical position (withdrawn). */
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82 | rk_ns_t_aaaa = 28, /* Ip6 Address. */
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83 | rk_ns_t_loc = 29, /* Location Information. */
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84 | rk_ns_t_nxt = 30, /* Next domain (security). */
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85 | rk_ns_t_eid = 31, /* Endpoint identifier. */
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86 | rk_ns_t_nimloc = 32, /* Nimrod Locator. */
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87 | rk_ns_t_srv = 33, /* Server Selection. */
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88 | rk_ns_t_atma = 34, /* ATM Address */
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89 | rk_ns_t_naptr = 35, /* Naming Authority PoinTeR */
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90 | rk_ns_t_kx = 36, /* Key Exchange */
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91 | rk_ns_t_cert = 37, /* Certification record */
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92 | rk_ns_t_a6 = 38, /* IPv6 address (deprecates AAAA) */
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93 | rk_ns_t_dname = 39, /* Non-terminal DNAME (for IPv6) */
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94 | rk_ns_t_sink = 40, /* Kitchen sink (experimentatl) */
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95 | rk_ns_t_opt = 41, /* EDNS0 option (meta-RR) */
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96 | rk_ns_t_apl = 42, /* Address prefix list (RFC 3123) */
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97 | rk_ns_t_ds = 43, /* Delegation Signer (RFC 3658) */
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98 | rk_ns_t_sshfp = 44, /* SSH fingerprint */
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99 | rk_ns_t_tkey = 249, /* Transaction key */
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100 | rk_ns_t_tsig = 250, /* Transaction signature. */
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101 | rk_ns_t_ixfr = 251, /* Incremental zone transfer. */
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102 | rk_ns_t_axfr = 252, /* Transfer zone of authority. */
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103 | rk_ns_t_mailb = 253, /* Transfer mailbox records. */
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104 | rk_ns_t_maila = 254, /* Transfer mail agent records. */
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105 | rk_ns_t_any = 255, /* Wildcard match. */
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106 | rk_ns_t_zxfr = 256, /* BIND-specific, nonstandard. */
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107 | rk_ns_t_max = 65536
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108 | };
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109 |
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110 | #ifndef MAXDNAME
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111 | #define MAXDNAME 1025
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112 | #endif
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113 |
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114 | #define mx_record rk_mx_record
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115 | #define srv_record rk_srv_record
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116 | #define key_record rk_key_record
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117 | #define sig_record rk_sig_record
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118 | #define cert_record rk_cert_record
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119 | #define sshfp_record rk_sshfp_record
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120 |
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121 | struct rk_dns_query{
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122 | char *domain;
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123 | unsigned type;
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124 | unsigned class;
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125 | };
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126 |
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127 | struct rk_mx_record{
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128 | unsigned preference;
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129 | char domain[1];
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130 | };
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131 |
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132 | struct rk_srv_record{
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133 | unsigned priority;
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134 | unsigned weight;
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135 | unsigned port;
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136 | char target[1];
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137 | };
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138 |
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139 | struct rk_key_record {
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140 | unsigned flags;
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141 | unsigned protocol;
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142 | unsigned algorithm;
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143 | size_t key_len;
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144 | u_char key_data[1];
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145 | };
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146 |
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147 | struct rk_sig_record {
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148 | unsigned type;
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149 | unsigned algorithm;
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150 | unsigned labels;
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151 | unsigned orig_ttl;
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152 | unsigned sig_expiration;
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153 | unsigned sig_inception;
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154 | unsigned key_tag;
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155 | char *signer;
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156 | size_t sig_len;
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157 | char sig_data[1]; /* also includes signer */
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158 | };
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159 |
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160 | struct rk_cert_record {
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161 | unsigned type;
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162 | unsigned tag;
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163 | unsigned algorithm;
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164 | size_t cert_len;
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165 | u_char cert_data[1];
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166 | };
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167 |
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168 | struct rk_sshfp_record {
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169 | unsigned algorithm;
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170 | unsigned type;
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171 | size_t sshfp_len;
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172 | u_char sshfp_data[1];
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173 | };
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174 |
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175 | struct rk_ds_record {
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176 | unsigned key_tag;
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177 | unsigned algorithm;
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178 | unsigned digest_type;
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179 | size_t digest_len;
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180 | u_char digest_data[1];
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181 | };
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182 |
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183 | struct rk_resource_record{
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184 | char *domain;
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185 | unsigned type;
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186 | unsigned class;
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187 | unsigned ttl;
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188 | unsigned size;
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189 | union {
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190 | void *data;
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191 | struct rk_mx_record *mx;
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192 | struct rk_mx_record *afsdb; /* mx and afsdb are identical */
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193 | struct rk_srv_record *srv;
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194 | struct in_addr *a;
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195 | char *txt;
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196 | struct rk_key_record *key;
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197 | struct rk_cert_record *cert;
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198 | struct rk_sig_record *sig;
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199 | struct rk_sshfp_record *sshfp;
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200 | struct rk_ds_record *ds;
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201 | }u;
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202 | struct rk_resource_record *next;
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203 | };
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204 |
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205 | #define rk_DNS_MAX_PACKET_SIZE 0xffff
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206 |
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207 | struct rk_dns_header {
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208 | unsigned id;
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209 | unsigned flags;
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210 | #define rk_DNS_HEADER_RESPONSE_FLAG 1
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211 | #define rk_DNS_HEADER_AUTHORITIVE_ANSWER 2
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212 | #define rk_DNS_HEADER_TRUNCATED_MESSAGE 4
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213 | #define rk_DNS_HEADER_RECURSION_DESIRED 8
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214 | #define rk_DNS_HEADER_RECURSION_AVAILABLE 16
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215 | #define rk_DNS_HEADER_AUTHENTIC_DATA 32
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216 | #define rk_DNS_HEADER_CHECKING_DISABLED 64
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217 | unsigned opcode;
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218 | unsigned response_code;
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219 | unsigned qdcount;
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220 | unsigned ancount;
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221 | unsigned nscount;
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222 | unsigned arcount;
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223 | };
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224 |
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225 | struct rk_dns_reply{
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226 | struct rk_dns_header h;
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227 | struct rk_dns_query q;
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228 | struct rk_resource_record *head;
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229 | };
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230 |
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231 |
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232 | #ifdef __cplusplus
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233 | extern "C" {
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234 | #endif
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235 |
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236 | ROKEN_LIB_FUNCTION struct rk_dns_reply* ROKEN_LIB_CALL
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237 | rk_dns_lookup(const char *, const char *);
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238 | ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
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239 | rk_dns_free_data(struct rk_dns_reply *);
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240 | ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
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241 | rk_dns_string_to_type(const char *name);
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242 | ROKEN_LIB_FUNCTION const char * ROKEN_LIB_CALL
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243 | rk_dns_type_to_string(int type);
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244 | ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
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245 | rk_dns_srv_order(struct rk_dns_reply*);
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246 |
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247 | #ifdef __cplusplus
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248 | }
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249 | #endif
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250 |
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251 | #endif /* __RESOLVE_H__ */
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