Sun, 14 Feb 2010 20:37:49 +0000
configmanager: Remove debugging code accidentally committed
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1 | -- Prosody IM |
615 | 2 | -- This file is included with Prosody IM. It has modifications, |
3 | -- which are hereby placed in the public domain. | |
337 | 4 | |
5 | -- public domain 20080404 lua@ztact.com | |
6 | ||
7 | ||
8 | -- todo: quick (default) header generation | |
9 | -- todo: nxdomain, error handling | |
10 | -- todo: cache results of encodeName | |
11 | ||
12 | ||
13 | -- reference: http://tools.ietf.org/html/rfc1035 | |
14 | -- reference: http://tools.ietf.org/html/rfc1876 (LOC) | |
15 | ||
16 | ||
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17 | local socket = require "socket"; |
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18 | local ztact = require "util.ztact"; |
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19 | local _, windows = pcall(require, "util.windows"); |
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20 | local is_windows = (_ and windows) or os.getenv("WINDIR"); |
337 | 21 | |
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22 | local coroutine, io, math, string, table = |
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23 | coroutine, io, math, string, table; |
337 | 24 | |
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25 | local ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack = |
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26 | ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack; |
337 | 27 | |
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28 | local get, set = ztact.get, ztact.set; |
337 | 29 | |
30 | ||
31 | -------------------------------------------------- module dns | |
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32 | module('dns') |
337 | 33 | local dns = _M; |
34 | ||
35 | ||
36 | -- dns type & class codes ------------------------------ dns type & class codes | |
37 | ||
38 | ||
39 | local append = table.insert | |
40 | ||
41 | ||
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42 | local function highbyte(i) -- - - - - - - - - - - - - - - - - - - highbyte |
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43 | return (i-(i%0x100))/0x100; |
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44 | end |
337 | 45 | |
46 | ||
47 | local function augment (t) -- - - - - - - - - - - - - - - - - - - - augment | |
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48 | local a = {}; |
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49 | for i,s in pairs(t) do |
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50 | a[i] = s; |
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51 | a[s] = s; |
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52 | a[string.lower(s)] = s; |
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53 | end |
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54 | return a; |
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55 | end |
337 | 56 | |
57 | ||
58 | local function encode (t) -- - - - - - - - - - - - - - - - - - - - - encode | |
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59 | local code = {}; |
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60 | for i,s in pairs(t) do |
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61 | local word = string.char(highbyte(i), i%0x100); |
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62 | code[i] = word; |
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63 | code[s] = word; |
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64 | code[string.lower(s)] = word; |
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65 | end |
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66 | return code; |
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67 | end |
337 | 68 | |
69 | ||
70 | dns.types = { | |
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71 | 'A', 'NS', 'MD', 'MF', 'CNAME', 'SOA', 'MB', 'MG', 'MR', 'NULL', 'WKS', |
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72 | 'PTR', 'HINFO', 'MINFO', 'MX', 'TXT', |
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73 | [ 28] = 'AAAA', [ 29] = 'LOC', [ 33] = 'SRV', |
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74 | [252] = 'AXFR', [253] = 'MAILB', [254] = 'MAILA', [255] = '*' }; |
337 | 75 | |
76 | ||
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77 | dns.classes = { 'IN', 'CS', 'CH', 'HS', [255] = '*' }; |
337 | 78 | |
79 | ||
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80 | dns.type = augment (dns.types); |
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81 | dns.class = augment (dns.classes); |
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82 | dns.typecode = encode (dns.types); |
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83 | dns.classcode = encode (dns.classes); |
337 | 84 | |
85 | ||
86 | ||
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87 | local function standardize(qname, qtype, qclass) -- - - - - - - standardize |
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88 | if string.byte(qname, -1) ~= 0x2E then qname = qname..'.'; end |
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89 | qname = string.lower(qname); |
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90 | return qname, dns.type[qtype or 'A'], dns.class[qclass or 'IN']; |
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91 | end |
337 | 92 | |
93 | ||
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94 | local function prune(rrs, time, soft) -- - - - - - - - - - - - - - - prune |
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95 | time = time or socket.gettime(); |
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96 | for i,rr in pairs(rrs) do |
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97 | if rr.tod then |
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98 | -- rr.tod = rr.tod - 50 -- accelerated decripitude |
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99 | rr.ttl = math.floor(rr.tod - time); |
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100 | if rr.ttl <= 0 then |
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101 | table.remove(rrs, i); |
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102 | return prune(rrs, time, soft); -- Re-iterate |
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103 | end |
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104 | elseif soft == 'soft' then -- What is this? I forget! |
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105 | assert(rr.ttl == 0); |
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106 | rrs[i] = nil; |
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107 | end |
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108 | end |
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109 | end |
337 | 110 | |
111 | ||
112 | -- metatables & co. ------------------------------------------ metatables & co. | |
113 | ||
114 | ||
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115 | local resolver = {}; |
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116 | resolver.__index = resolver; |
337 | 117 | |
118 | ||
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119 | local SRV_tostring; |
337 | 120 | |
121 | ||
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122 | local rr_metatable = {}; -- - - - - - - - - - - - - - - - - - - rr_metatable |
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123 | function rr_metatable.__tostring(rr) |
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124 | local s0 = string.format('%2s %-5s %6i %-28s', rr.class, rr.type, rr.ttl, rr.name); |
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125 | local s1 = ''; |
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126 | if rr.type == 'A' then |
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127 | s1 = ' '..rr.a; |
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128 | elseif rr.type == 'MX' then |
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129 | s1 = string.format(' %2i %s', rr.pref, rr.mx); |
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130 | elseif rr.type == 'CNAME' then |
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131 | s1 = ' '..rr.cname; |
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132 | elseif rr.type == 'LOC' then |
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133 | s1 = ' '..resolver.LOC_tostring(rr); |
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134 | elseif rr.type == 'NS' then |
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135 | s1 = ' '..rr.ns; |
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136 | elseif rr.type == 'SRV' then |
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137 | s1 = ' '..SRV_tostring(rr); |
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138 | elseif rr.type == 'TXT' then |
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139 | s1 = ' '..rr.txt; |
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140 | else |
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141 | s1 = ' <UNKNOWN RDATA TYPE>'; |
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142 | end |
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143 | return s0..s1; |
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144 | end |
337 | 145 | |
146 | ||
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147 | local rrs_metatable = {}; -- - - - - - - - - - - - - - - - - - rrs_metatable |
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148 | function rrs_metatable.__tostring(rrs) |
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149 | local t = {}; |
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150 | for i,rr in pairs(rrs) do |
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151 | append(t, tostring(rr)..'\n'); |
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152 | end |
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153 | return table.concat(t); |
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154 | end |
337 | 155 | |
156 | ||
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157 | local cache_metatable = {}; -- - - - - - - - - - - - - - - - cache_metatable |
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158 | function cache_metatable.__tostring(cache) |
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159 | local time = socket.gettime(); |
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160 | local t = {}; |
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161 | for class,types in pairs(cache) do |
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162 | for type,names in pairs(types) do |
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163 | for name,rrs in pairs(names) do |
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164 | prune(rrs, time); |
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165 | append(t, tostring(rrs)); |
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166 | end |
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167 | end |
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168 | end |
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169 | return table.concat(t); |
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170 | end |
337 | 171 | |
172 | ||
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173 | function resolver:new() -- - - - - - - - - - - - - - - - - - - - - resolver |
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174 | local r = { active = {}, cache = {}, unsorted = {} }; |
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175 | setmetatable(r, resolver); |
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176 | setmetatable(r.cache, cache_metatable); |
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177 | setmetatable(r.unsorted, { __mode = 'kv' }); |
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178 | return r; |
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179 | end |
337 | 180 | |
181 | ||
182 | -- packet layer -------------------------------------------------- packet layer | |
183 | ||
184 | ||
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185 | function dns.random(...) -- - - - - - - - - - - - - - - - - - - dns.random |
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186 | math.randomseed(10000*socket.gettime()); |
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187 | dns.random = math.random; |
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188 | return dns.random(...); |
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189 | end |
337 | 190 | |
191 | ||
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192 | local function encodeHeader(o) -- - - - - - - - - - - - - - - encodeHeader |
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193 | o = o or {}; |
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194 | o.id = o.id or dns.random(0, 0xffff); -- 16b (random) id |
337 | 195 | |
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196 | o.rd = o.rd or 1; -- 1b 1 recursion desired |
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197 | o.tc = o.tc or 0; -- 1b 1 truncated response |
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198 | o.aa = o.aa or 0; -- 1b 1 authoritative response |
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199 | o.opcode = o.opcode or 0; -- 4b 0 query |
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200 | -- 1 inverse query |
337 | 201 | -- 2 server status request |
202 | -- 3-15 reserved | |
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203 | o.qr = o.qr or 0; -- 1b 0 query, 1 response |
337 | 204 | |
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205 | o.rcode = o.rcode or 0; -- 4b 0 no error |
337 | 206 | -- 1 format error |
207 | -- 2 server failure | |
208 | -- 3 name error | |
209 | -- 4 not implemented | |
210 | -- 5 refused | |
211 | -- 6-15 reserved | |
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212 | o.z = o.z or 0; -- 3b 0 resvered |
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213 | o.ra = o.ra or 0; -- 1b 1 recursion available |
337 | 214 | |
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215 | o.qdcount = o.qdcount or 1; -- 16b number of question RRs |
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216 | o.ancount = o.ancount or 0; -- 16b number of answers RRs |
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217 | o.nscount = o.nscount or 0; -- 16b number of nameservers RRs |
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218 | o.arcount = o.arcount or 0; -- 16b number of additional RRs |
337 | 219 | |
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220 | -- string.char() rounds, so prevent roundup with -0.4999 |
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221 | local header = string.char( |
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222 | highbyte(o.id), o.id %0x100, |
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223 | o.rd + 2*o.tc + 4*o.aa + 8*o.opcode + 128*o.qr, |
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224 | o.rcode + 16*o.z + 128*o.ra, |
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225 | highbyte(o.qdcount), o.qdcount %0x100, |
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226 | highbyte(o.ancount), o.ancount %0x100, |
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227 | highbyte(o.nscount), o.nscount %0x100, |
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228 | highbyte(o.arcount), o.arcount %0x100 |
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229 | ); |
337 | 230 | |
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231 | return header, o.id; |
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232 | end |
337 | 233 | |
234 | ||
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235 | local function encodeName(name) -- - - - - - - - - - - - - - - - encodeName |
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236 | local t = {}; |
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237 | for part in string.gmatch(name, '[^.]+') do |
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238 | append(t, string.char(string.len(part))); |
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239 | append(t, part); |
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240 | end |
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241 | append(t, string.char(0)); |
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242 | return table.concat(t); |
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243 | end |
337 | 244 | |
245 | ||
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246 | local function encodeQuestion(qname, qtype, qclass) -- - - - encodeQuestion |
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247 | qname = encodeName(qname); |
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248 | qtype = dns.typecode[qtype or 'a']; |
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249 | qclass = dns.classcode[qclass or 'in']; |
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250 | return qname..qtype..qclass; |
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251 | end |
337 | 252 | |
253 | ||
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254 | function resolver:byte(len) -- - - - - - - - - - - - - - - - - - - - - byte |
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255 | len = len or 1; |
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256 | local offset = self.offset; |
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257 | local last = offset + len - 1; |
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258 | if last > #self.packet then |
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259 | error(string.format('out of bounds: %i>%i', last, #self.packet)); |
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260 | end |
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261 | self.offset = offset + len; |
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262 | return string.byte(self.packet, offset, last); |
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263 | end |
337 | 264 | |
265 | ||
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266 | function resolver:word() -- - - - - - - - - - - - - - - - - - - - - - word |
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267 | local b1, b2 = self:byte(2); |
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268 | return 0x100*b1 + b2; |
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269 | end |
337 | 270 | |
271 | ||
272 | function resolver:dword () -- - - - - - - - - - - - - - - - - - - - - dword | |
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273 | local b1, b2, b3, b4 = self:byte(4); |
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274 | --print('dword', b1, b2, b3, b4); |
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275 | return 0x1000000*b1 + 0x10000*b2 + 0x100*b3 + b4; |
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276 | end |
337 | 277 | |
278 | ||
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279 | function resolver:sub(len) -- - - - - - - - - - - - - - - - - - - - - - sub |
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280 | len = len or 1; |
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281 | local s = string.sub(self.packet, self.offset, self.offset + len - 1); |
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282 | self.offset = self.offset + len; |
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283 | return s; |
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284 | end |
337 | 285 | |
286 | ||
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287 | function resolver:header(force) -- - - - - - - - - - - - - - - - - - header |
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288 | local id = self:word(); |
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289 | --print(string.format(':header id %x', id)); |
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290 | if not self.active[id] and not force then return nil; end |
337 | 291 | |
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292 | local h = { id = id }; |
337 | 293 | |
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294 | local b1, b2 = self:byte(2); |
337 | 295 | |
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296 | h.rd = b1 %2; |
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297 | h.tc = b1 /2%2; |
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298 | h.aa = b1 /4%2; |
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299 | h.opcode = b1 /8%16; |
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300 | h.qr = b1 /128; |
337 | 301 | |
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302 | h.rcode = b2 %16; |
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303 | h.z = b2 /16%8; |
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304 | h.ra = b2 /128; |
337 | 305 | |
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306 | h.qdcount = self:word(); |
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307 | h.ancount = self:word(); |
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308 | h.nscount = self:word(); |
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309 | h.arcount = self:word(); |
337 | 310 | |
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311 | for k,v in pairs(h) do h[k] = v-v%1; end |
337 | 312 | |
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313 | return h; |
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314 | end |
337 | 315 | |
316 | ||
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317 | function resolver:name() -- - - - - - - - - - - - - - - - - - - - - - name |
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318 | local remember, pointers = nil, 0; |
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319 | local len = self:byte(); |
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320 | local n = {}; |
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321 | while len > 0 do |
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322 | if len >= 0xc0 then -- name is "compressed" |
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323 | pointers = pointers + 1; |
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324 | if pointers >= 20 then error('dns error: 20 pointers'); end; |
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325 | local offset = ((len-0xc0)*0x100) + self:byte(); |
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326 | remember = remember or self.offset; |
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327 | self.offset = offset + 1; -- +1 for lua |
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328 | else -- name is not compressed |
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329 | append(n, self:sub(len)..'.'); |
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330 | end |
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331 | len = self:byte(); |
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332 | end |
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333 | self.offset = remember or self.offset; |
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334 | return table.concat(n); |
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335 | end |
337 | 336 | |
337 | ||
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338 | function resolver:question() -- - - - - - - - - - - - - - - - - - question |
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339 | local q = {}; |
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340 | q.name = self:name(); |
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341 | q.type = dns.type[self:word()]; |
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342 | q.class = dns.class[self:word()]; |
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343 | return q; |
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344 | end |
337 | 345 | |
346 | ||
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347 | function resolver:A(rr) -- - - - - - - - - - - - - - - - - - - - - - - - A |
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348 | local b1, b2, b3, b4 = self:byte(4); |
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349 | rr.a = string.format('%i.%i.%i.%i', b1, b2, b3, b4); |
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350 | end |
337 | 351 | |
352 | ||
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353 | function resolver:CNAME(rr) -- - - - - - - - - - - - - - - - - - - - CNAME |
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354 | rr.cname = self:name(); |
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355 | end |
337 | 356 | |
357 | ||
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358 | function resolver:MX(rr) -- - - - - - - - - - - - - - - - - - - - - - - MX |
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359 | rr.pref = self:word(); |
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360 | rr.mx = self:name(); |
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361 | end |
337 | 362 | |
363 | ||
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364 | function resolver:LOC_nibble_power() -- - - - - - - - - - LOC_nibble_power |
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365 | local b = self:byte(); |
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366 | --print('nibbles', ((b-(b%0x10))/0x10), (b%0x10)); |
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367 | return ((b-(b%0x10))/0x10) * (10^(b%0x10)); |
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368 | end |
337 | 369 | |
370 | ||
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371 | function resolver:LOC(rr) -- - - - - - - - - - - - - - - - - - - - - - LOC |
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372 | rr.version = self:byte(); |
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373 | if rr.version == 0 then |
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374 | rr.loc = rr.loc or {}; |
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375 | rr.loc.size = self:LOC_nibble_power(); |
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376 | rr.loc.horiz_pre = self:LOC_nibble_power(); |
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377 | rr.loc.vert_pre = self:LOC_nibble_power(); |
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378 | rr.loc.latitude = self:dword(); |
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379 | rr.loc.longitude = self:dword(); |
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380 | rr.loc.altitude = self:dword(); |
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381 | end |
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382 | end |
337 | 383 | |
384 | ||
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385 | local function LOC_tostring_degrees(f, pos, neg) -- - - - - - - - - - - - - |
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386 | f = f - 0x80000000; |
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387 | if f < 0 then pos = neg; f = -f; end |
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388 | local deg, min, msec; |
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389 | msec = f%60000; |
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390 | f = (f-msec)/60000; |
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391 | min = f%60; |
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392 | deg = (f-min)/60; |
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393 | return string.format('%3d %2d %2.3f %s', deg, min, msec/1000, pos); |
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394 | end |
337 | 395 | |
396 | ||
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397 | function resolver.LOC_tostring(rr) -- - - - - - - - - - - - - LOC_tostring |
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398 | local t = {}; |
337 | 399 | |
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400 | --[[ |
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401 | for k,name in pairs { 'size', 'horiz_pre', 'vert_pre', 'latitude', 'longitude', 'altitude' } do |
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402 | append(t, string.format('%4s%-10s: %12.0f\n', '', name, rr.loc[name])); |
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403 | end |
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404 | --]] |
337 | 405 | |
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406 | append(t, string.format( |
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407 | '%s %s %.2fm %.2fm %.2fm %.2fm', |
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408 | LOC_tostring_degrees (rr.loc.latitude, 'N', 'S'), |
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409 | LOC_tostring_degrees (rr.loc.longitude, 'E', 'W'), |
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410 | (rr.loc.altitude - 10000000) / 100, |
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411 | rr.loc.size / 100, |
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412 | rr.loc.horiz_pre / 100, |
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413 | rr.loc.vert_pre / 100 |
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414 | )); |
337 | 415 | |
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416 | return table.concat(t); |
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417 | end |
337 | 418 | |
419 | ||
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420 | function resolver:NS(rr) -- - - - - - - - - - - - - - - - - - - - - - - NS |
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421 | rr.ns = self:name(); |
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422 | end |
337 | 423 | |
424 | ||
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425 | function resolver:SOA(rr) -- - - - - - - - - - - - - - - - - - - - - - SOA |
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426 | end |
337 | 427 | |
428 | ||
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429 | function resolver:SRV(rr) -- - - - - - - - - - - - - - - - - - - - - - SRV |
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430 | rr.srv = {}; |
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431 | rr.srv.priority = self:word(); |
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|
432 | rr.srv.weight = self:word(); |
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433 | rr.srv.port = self:word(); |
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|
434 | rr.srv.target = self:name(); |
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|
435 | end |
337 | 436 | |
437 | ||
2070
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|
438 | function SRV_tostring(rr) -- - - - - - - - - - - - - - - - - - SRV_tostring |
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|
439 | local s = rr.srv; |
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|
440 | return string.format( '%5d %5d %5d %s', s.priority, s.weight, s.port, s.target ); |
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441 | end |
337 | 442 | |
443 | ||
2070
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|
444 | function resolver:TXT(rr) -- - - - - - - - - - - - - - - - - - - - - - TXT |
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|
445 | rr.txt = self:sub (rr.rdlength); |
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446 | end |
337 | 447 | |
448 | ||
2070
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|
449 | function resolver:rr() -- - - - - - - - - - - - - - - - - - - - - - - - rr |
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|
450 | local rr = {}; |
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|
451 | setmetatable(rr, rr_metatable); |
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|
452 | rr.name = self:name(self); |
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|
453 | rr.type = dns.type[self:word()] or rr.type; |
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|
454 | rr.class = dns.class[self:word()] or rr.class; |
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|
455 | rr.ttl = 0x10000*self:word() + self:word(); |
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456 | rr.rdlength = self:word(); |
337 | 457 | |
2070
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|
458 | if rr.ttl <= 0 then |
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|
459 | rr.tod = self.time + 30; |
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460 | else |
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|
461 | rr.tod = self.time + rr.ttl; |
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462 | end |
337 | 463 | |
2070
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|
464 | local remember = self.offset; |
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|
465 | local rr_parser = self[dns.type[rr.type]]; |
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466 | if rr_parser then rr_parser(self, rr); end |
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|
467 | self.offset = remember; |
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|
468 | rr.rdata = self:sub(rr.rdlength); |
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|
469 | return rr; |
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|
470 | end |
337 | 471 | |
472 | ||
473 | function resolver:rrs (count) -- - - - - - - - - - - - - - - - - - - - - rrs | |
2070
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474 | local rrs = {}; |
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|
475 | for i = 1,count do append(rrs, self:rr()); end |
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|
476 | return rrs; |
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|
477 | end |
337 | 478 | |
479 | ||
2070
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|
480 | function resolver:decode(packet, force) -- - - - - - - - - - - - - - decode |
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|
481 | self.packet, self.offset = packet, 1; |
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|
482 | local header = self:header(force); |
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|
483 | if not header then return nil; end |
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|
484 | local response = { header = header }; |
337 | 485 | |
2070
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|
486 | response.question = {}; |
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|
487 | local offset = self.offset; |
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Waqas Hussain <waqas20@gmail.com>
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|
488 | for i = 1,response.header.qdcount do |
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Waqas Hussain <waqas20@gmail.com>
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|
489 | append(response.question, self:question()); |
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Waqas Hussain <waqas20@gmail.com>
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490 | end |
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|
491 | response.question.raw = string.sub(self.packet, offset, self.offset - 1); |
337 | 492 | |
2070
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493 | if not force then |
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|
494 | if not self.active[response.header.id] or not self.active[response.header.id][response.question.raw] then |
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|
495 | return nil; |
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|
496 | end |
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|
497 | end |
337 | 498 | |
2070
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diff
changeset
|
499 | response.answer = self:rrs(response.header.ancount); |
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|
500 | response.authority = self:rrs(response.header.nscount); |
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|
501 | response.additional = self:rrs(response.header.arcount); |
337 | 502 | |
2070
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diff
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|
503 | return response; |
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|
504 | end |
337 | 505 | |
506 | ||
507 | -- socket layer -------------------------------------------------- socket layer | |
508 | ||
509 | ||
2070
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diff
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|
510 | resolver.delays = { 1, 3 }; |
337 | 511 | |
512 | ||
2070
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|
513 | function resolver:addnameserver(address) -- - - - - - - - - - addnameserver |
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|
514 | self.server = self.server or {}; |
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parents:
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|
515 | append(self.server, address); |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
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|
516 | end |
337 | 517 | |
518 | ||
2070
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|
519 | function resolver:setnameserver(address) -- - - - - - - - - - setnameserver |
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parents:
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diff
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|
520 | self.server = {}; |
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parents:
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|
521 | self:addnameserver(address); |
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|
522 | end |
337 | 523 | |
524 | ||
2070
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diff
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|
525 | function resolver:adddefaultnameservers() -- - - - - adddefaultnameservers |
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diff
changeset
|
526 | if is_windows then |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
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|
527 | if windows then |
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Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
528 | for _, server in ipairs(windows.get_nameservers()) do |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
529 | self:addnameserver(server); |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
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|
530 | end |
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Waqas Hussain <waqas20@gmail.com>
parents:
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|
531 | end |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
532 | if not self.server or #self.server == 0 then |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
533 | -- TODO log warning about no nameservers, adding opendns servers as fallback |
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Waqas Hussain <waqas20@gmail.com>
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diff
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|
534 | self:addnameserver("208.67.222.222"); |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
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diff
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|
535 | self:addnameserver("208.67.220.220") ; |
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diff
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|
536 | end |
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parents:
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diff
changeset
|
537 | else -- posix |
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parents:
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diff
changeset
|
538 | local resolv_conf = io.open("/etc/resolv.conf"); |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
539 | if resolv_conf then |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
540 | for line in resolv_conf:lines() do |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
541 | local address = line:gsub("#.*$", ""):match('^%s*nameserver%s+(%d+%.%d+%.%d+%.%d+)%s*$'); |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
542 | if address then self:addnameserver(address) end |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
543 | end |
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Waqas Hussain <waqas20@gmail.com>
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|
544 | end |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
545 | if not self.server or #self.server == 0 then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
546 | -- TODO log warning about no nameservers, adding localhost as the default nameserver |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
547 | self:addnameserver("127.0.0.1"); |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
548 | end |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
549 | end |
399
93b6587d9afb
Added temporary fix for srv on windows: using opendns nameservers
Waqas Hussain <waqas20@gmail.com>
parents:
379
diff
changeset
|
550 | end |
337 | 551 | |
552 | ||
2070
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parents:
2068
diff
changeset
|
553 | function resolver:getsocket(servernum) -- - - - - - - - - - - - - getsocket |
72357b1c6d88
net.dns: Fixed indentation and coding style.
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changeset
|
554 | self.socket = self.socket or {}; |
72357b1c6d88
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parents:
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diff
changeset
|
555 | self.socketset = self.socketset or {}; |
337 | 556 | |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
557 | local sock = self.socket[servernum]; |
72357b1c6d88
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parents:
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diff
changeset
|
558 | if sock then return sock; end |
337 | 559 | |
2070
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
560 | sock = socket.udp(); |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
561 | if self.socket_wrapper then sock = self.socket_wrapper(sock, self); end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
562 | sock:settimeout(0); |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
563 | -- todo: attempt to use a random port, fallback to 0 |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
564 | sock:setsockname('*', 0); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
565 | sock:setpeername(self.server[servernum], 53); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
566 | self.socket[servernum] = sock; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
567 | self.socketset[sock] = servernum; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
568 | return sock; |
1786
4016d8bc30b8
net.dns: Multiple internal changes and API extensions to allow for more reliable DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
1523
diff
changeset
|
569 | end |
337 | 570 | |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
571 | function resolver:voidsocket(sock) |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
572 | if self.socket[sock] then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
573 | self.socketset[self.socket[sock]] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
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parents:
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diff
changeset
|
574 | self.socket[sock] = nil; |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
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|
575 | elseif self.socketset[sock] then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
576 | self.socket[self.socketset[sock]] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
577 | self.socketset[sock] = nil; |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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578 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
579 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
580 | |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
581 | function resolver:socket_wrapper_set(func) -- - - - - - - socket_wrapper_set |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
582 | self.socket_wrapper = func; |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
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|
583 | end |
337 | 584 | |
585 | ||
586 | function resolver:closeall () -- - - - - - - - - - - - - - - - - - closeall | |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
587 | for i,sock in ipairs(self.socket) do |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
588 | self.socket[i] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
589 | self.socketset[sock] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
590 | sock:close(); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
591 | end |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
592 | end |
337 | 593 | |
594 | ||
2070
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net.dns: Fixed indentation and coding style.
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parents:
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diff
changeset
|
595 | function resolver:remember(rr, type) -- - - - - - - - - - - - - - remember |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
596 | --print ('remember', type, rr.class, rr.type, rr.name) |
2856
70e6ea49aff3
net.dns: Normalize records before placing them in the cache, fixes issues with CNAME targets in CAPS (fixes #161)
Matthew Wild <mwild1@gmail.com>
parents:
2082
diff
changeset
|
597 | local qname, qtype, qclass = standardize(rr.name, rr.type, rr.class); |
337 | 598 | |
2070
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
599 | if type ~= '*' then |
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70e6ea49aff3
net.dns: Normalize records before placing them in the cache, fixes issues with CNAME targets in CAPS (fixes #161)
Matthew Wild <mwild1@gmail.com>
parents:
2082
diff
changeset
|
600 | type = qtype; |
70e6ea49aff3
net.dns: Normalize records before placing them in the cache, fixes issues with CNAME targets in CAPS (fixes #161)
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
601 | local all = get(self.cache, qclass, '*', qname); |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
602 | --print('remember all', all); |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
603 | if all then append(all, rr); end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
604 | end |
337 | 605 | |
2070
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parents:
2068
diff
changeset
|
606 | self.cache = self.cache or setmetatable({}, cache_metatable); |
2856
70e6ea49aff3
net.dns: Normalize records before placing them in the cache, fixes issues with CNAME targets in CAPS (fixes #161)
Matthew Wild <mwild1@gmail.com>
parents:
2082
diff
changeset
|
607 | local rrs = get(self.cache, qclass, type, qname) or |
70e6ea49aff3
net.dns: Normalize records before placing them in the cache, fixes issues with CNAME targets in CAPS (fixes #161)
Matthew Wild <mwild1@gmail.com>
parents:
2082
diff
changeset
|
608 | set(self.cache, qclass, type, qname, setmetatable({}, rrs_metatable)); |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
609 | append(rrs, rr); |
337 | 610 | |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
611 | if type == 'MX' then self.unsorted[rrs] = true; end |
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net.dns: Fixed indentation and coding style.
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612 | end |
337 | 613 | |
614 | ||
2070
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parents:
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diff
changeset
|
615 | local function comp_mx(a, b) -- - - - - - - - - - - - - - - - - - - comp_mx |
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Waqas Hussain <waqas20@gmail.com>
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changeset
|
616 | return (a.pref == b.pref) and (a.mx < b.mx) or (a.pref < b.pref); |
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parents:
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617 | end |
337 | 618 | |
619 | ||
620 | function resolver:peek (qname, qtype, qclass) -- - - - - - - - - - - - peek | |
2070
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parents:
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changeset
|
621 | qname, qtype, qclass = standardize(qname, qtype, qclass); |
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net.dns: Fixed indentation and coding style.
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changeset
|
622 | local rrs = get(self.cache, qclass, qtype, qname); |
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parents:
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|
623 | if not rrs then return nil; end |
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|
624 | if prune(rrs, socket.gettime()) and qtype == '*' or not next(rrs) then |
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changeset
|
625 | set(self.cache, qclass, qtype, qname, nil); |
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|
626 | return nil; |
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627 | end |
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diff
changeset
|
628 | if self.unsorted[rrs] then table.sort (rrs, comp_mx); end |
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parents:
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diff
changeset
|
629 | return rrs; |
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changeset
|
630 | end |
337 | 631 | |
632 | ||
2070
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changeset
|
633 | function resolver:purge(soft) -- - - - - - - - - - - - - - - - - - - purge |
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parents:
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diff
changeset
|
634 | if soft == 'soft' then |
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Waqas Hussain <waqas20@gmail.com>
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changeset
|
635 | self.time = socket.gettime(); |
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changeset
|
636 | for class,types in pairs(self.cache or {}) do |
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parents:
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changeset
|
637 | for type,names in pairs(types) do |
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Waqas Hussain <waqas20@gmail.com>
parents:
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changeset
|
638 | for name,rrs in pairs(names) do |
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parents:
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|
639 | prune(rrs, self.time, 'soft') |
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|
640 | end |
72357b1c6d88
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diff
changeset
|
641 | end |
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changeset
|
642 | end |
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parents:
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diff
changeset
|
643 | else self.cache = {}; end |
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Waqas Hussain <waqas20@gmail.com>
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|
644 | end |
337 | 645 | |
646 | ||
2070
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diff
changeset
|
647 | function resolver:query(qname, qtype, qclass) -- - - - - - - - - - -- query |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
648 | qname, qtype, qclass = standardize(qname, qtype, qclass) |
337 | 649 | |
2070
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parents:
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diff
changeset
|
650 | if not self.server then self:adddefaultnameservers(); end |
337 | 651 | |
2070
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Waqas Hussain <waqas20@gmail.com>
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changeset
|
652 | local question = encodeQuestion(qname, qtype, qclass); |
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diff
changeset
|
653 | local peek = self:peek (qname, qtype, qclass); |
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parents:
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|
654 | if peek then return peek; end |
337 | 655 | |
2070
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|
656 | local header, id = encodeHeader(); |
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Waqas Hussain <waqas20@gmail.com>
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changeset
|
657 | --print ('query id', id, qclass, qtype, qname) |
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|
658 | local o = { |
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Waqas Hussain <waqas20@gmail.com>
parents:
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|
659 | packet = header..question, |
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Waqas Hussain <waqas20@gmail.com>
parents:
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changeset
|
660 | server = self.best_server, |
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Waqas Hussain <waqas20@gmail.com>
parents:
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changeset
|
661 | delay = 1, |
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diff
changeset
|
662 | retry = socket.gettime() + self.delays[1] |
72357b1c6d88
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|
663 | }; |
337 | 664 | |
665 | -- remember the query | |
2070
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|
666 | self.active[id] = self.active[id] or {}; |
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|
667 | self.active[id][question] = o; |
337 | 668 | |
669 | -- remember which coroutine wants the answer | |
2070
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|
670 | local co = coroutine.running(); |
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|
671 | if co then |
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|
672 | set(self.wanted, qclass, qtype, qname, co, true); |
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|
673 | --set(self.yielded, co, qclass, qtype, qname, true); |
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|
674 | end |
1786
4016d8bc30b8
net.dns: Multiple internal changes and API extensions to allow for more reliable DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
675 | |
2070
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|
676 | self:getsocket (o.server):send (o.packet) |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
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|
677 | end |
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
678 | |
1786
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net.dns: Multiple internal changes and API extensions to allow for more reliable DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
679 | function resolver:servfail(sock) |
2070
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|
680 | -- Resend all queries for this server |
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|
681 | |
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changeset
|
682 | local num = self.socketset[sock] |
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|
683 | |
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|
684 | -- Socket is dead now |
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|
685 | self:voidsocket(sock); |
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diff
changeset
|
686 | |
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changeset
|
687 | -- Find all requests to the down server, and retry on the next server |
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|
688 | self.time = socket.gettime(); |
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|
689 | for id,queries in pairs(self.active) do |
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changeset
|
690 | for question,o in pairs(queries) do |
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|
691 | if o.server == num then -- This request was to the broken server |
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|
692 | o.server = o.server + 1 -- Use next server |
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diff
changeset
|
693 | if o.server > #self.server then |
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|
694 | o.server = 1; |
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|
695 | end |
337 | 696 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
697 | o.retries = (o.retries or 0) + 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
698 | if o.retries >= #self.server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
699 | --print('timeout'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
700 | queries[question] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
701 | else |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
702 | local _a = self:getsocket(o.server); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
703 | if _a then _a:send(o.packet); end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
704 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
705 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
706 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
707 | end |
1786
4016d8bc30b8
net.dns: Multiple internal changes and API extensions to allow for more reliable DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
1523
diff
changeset
|
708 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
709 | if num == self.best_server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
710 | self.best_server = self.best_server + 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
711 | if self.best_server > #self.server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
712 | -- Exhausted all servers, try first again |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
713 | self.best_server = 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
714 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
715 | end |
1786
4016d8bc30b8
net.dns: Multiple internal changes and API extensions to allow for more reliable DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
1523
diff
changeset
|
716 | end |
337 | 717 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
718 | function resolver:receive(rset) -- - - - - - - - - - - - - - - - - receive |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
719 | --print('receive'); print(self.socket); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
720 | self.time = socket.gettime(); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
721 | rset = rset or self.socket; |
337 | 722 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
723 | local response; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
724 | for i,sock in pairs(rset) do |
337 | 725 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
726 | if self.socketset[sock] then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
727 | local packet = sock:receive(); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
728 | if packet then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
729 | response = self:decode(packet); |
2081
b9bbb709d62e
net.dns: Be more strict about checking the DNS replies we receive
Matthew Wild <mwild1@gmail.com>
parents:
2070
diff
changeset
|
730 | if response and self.active[response.header.id] |
b9bbb709d62e
net.dns: Be more strict about checking the DNS replies we receive
Matthew Wild <mwild1@gmail.com>
parents:
2070
diff
changeset
|
731 | and self.active[response.header.id][response.question.raw] then |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
732 | --print('received response'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
733 | --self.print(response); |
337 | 734 | |
2082
1381b2071c2e
net.dns: Be more strict about the records we cache
Matthew Wild <mwild1@gmail.com>
parents:
2081
diff
changeset
|
735 | for j,rr in pairs(response.answer) do |
1381b2071c2e
net.dns: Be more strict about the records we cache
Matthew Wild <mwild1@gmail.com>
parents:
2081
diff
changeset
|
736 | if rr.name:sub(-#response.question[1].name, -1) == response.question[1].name then |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
737 | self:remember(rr, response.question[1].type) |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
738 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
739 | end |
337 | 740 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
741 | -- retire the query |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
742 | local queries = self.active[response.header.id]; |
2082
1381b2071c2e
net.dns: Be more strict about the records we cache
Matthew Wild <mwild1@gmail.com>
parents:
2081
diff
changeset
|
743 | queries[response.question.raw] = nil; |
1381b2071c2e
net.dns: Be more strict about the records we cache
Matthew Wild <mwild1@gmail.com>
parents:
2081
diff
changeset
|
744 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
745 | if not next(queries) then self.active[response.header.id] = nil; end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
746 | if not next(self.active) then self:closeall(); end |
337 | 747 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
748 | -- was the query on the wanted list? |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
749 | local q = response.question; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
750 | local cos = get(self.wanted, q.class, q.type, q.name); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
751 | if cos then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
752 | for co in pairs(cos) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
753 | set(self.yielded, co, q.class, q.type, q.name, nil); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
754 | if coroutine.status(co) == "suspended" then coroutine.resume(co); end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
755 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
756 | set(self.wanted, q.class, q.type, q.name, nil); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
757 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
758 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
759 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
760 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
761 | end |
337 | 762 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
763 | return response; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
764 | end |
337 | 765 | |
766 | ||
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
767 | function resolver:feed(sock, packet) |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
768 | --print('receive'); print(self.socket); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
769 | self.time = socket.gettime(); |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
770 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
771 | local response = self:decode(packet); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
772 | if response then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
773 | --print('received response'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
774 | --self.print(response); |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
775 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
776 | for i,section in pairs({ 'answer', 'authority', 'additional' }) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
777 | for j,rr in pairs(response[section]) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
778 | self:remember(rr, response.question[1].type); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
779 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
780 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
781 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
782 | -- retire the query |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
783 | local queries = self.active[response.header.id]; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
784 | if queries[response.question.raw] then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
785 | queries[response.question.raw] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
786 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
787 | if not next(queries) then self.active[response.header.id] = nil; end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
788 | if not next(self.active) then self:closeall(); end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
789 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
790 | -- was the query on the wanted list? |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
791 | local q = response.question[1]; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
792 | if q then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
793 | local cos = get(self.wanted, q.class, q.type, q.name); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
794 | if cos then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
795 | for co in pairs(cos) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
796 | set(self.yielded, co, q.class, q.type, q.name, nil); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
797 | if coroutine.status(co) == "suspended" then coroutine.resume(co); end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
798 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
799 | set(self.wanted, q.class, q.type, q.name, nil); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
800 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
801 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
802 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
803 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
804 | return response; |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
805 | end |
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
806 | |
1202
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
807 | function resolver:cancel(data) |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
808 | local cos = get(self.wanted, unpack(data, 1, 3)); |
1202
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
809 | if cos then |
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
810 | cos[data[4]] = nil; |
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
811 | end |
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
812 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
813 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
814 | function resolver:pulse() -- - - - - - - - - - - - - - - - - - - - - pulse |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
815 | --print(':pulse'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
816 | while self:receive() do end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
817 | if not next(self.active) then return nil; end |
337 | 818 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
819 | self.time = socket.gettime(); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
820 | for id,queries in pairs(self.active) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
821 | for question,o in pairs(queries) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
822 | if self.time >= o.retry then |
337 | 823 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
824 | o.server = o.server + 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
825 | if o.server > #self.server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
826 | o.server = 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
827 | o.delay = o.delay + 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
828 | end |
337 | 829 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
830 | if o.delay > #self.delays then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
831 | --print('timeout'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
832 | queries[question] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
833 | if not next(queries) then self.active[id] = nil; end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
834 | if not next(self.active) then return nil; end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
835 | else |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
836 | --print('retry', o.server, o.delay); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
837 | local _a = self.socket[o.server]; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
838 | if _a then _a:send(o.packet); end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
839 | o.retry = self.time + self.delays[o.delay]; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
840 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
841 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
842 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
843 | end |
337 | 844 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
845 | if next(self.active) then return true; end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
846 | return nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
847 | end |
337 | 848 | |
849 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
850 | function resolver:lookup(qname, qtype, qclass) -- - - - - - - - - - lookup |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
851 | self:query (qname, qtype, qclass) |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
852 | while self:pulse() do socket.select(self.socket, nil, 4); end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
853 | --print(self.cache); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
854 | return self:peek(qname, qtype, qclass); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
855 | end |
337 | 856 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
857 | function resolver:lookupex(handler, qname, qtype, qclass) -- - - - - - - - - - lookup |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
858 | return self:peek(qname, qtype, qclass) or self:query(qname, qtype, qclass); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
859 | end |
337 | 860 | |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
861 | |
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
862 | --print ---------------------------------------------------------------- print |
337 | 863 | |
864 | ||
865 | local hints = { -- - - - - - - - - - - - - - - - - - - - - - - - - - - hints | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
866 | qr = { [0]='query', 'response' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
867 | opcode = { [0]='query', 'inverse query', 'server status request' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
868 | aa = { [0]='non-authoritative', 'authoritative' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
869 | tc = { [0]='complete', 'truncated' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
870 | rd = { [0]='recursion not desired', 'recursion desired' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
871 | ra = { [0]='recursion not available', 'recursion available' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
872 | z = { [0]='(reserved)' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
873 | rcode = { [0]='no error', 'format error', 'server failure', 'name error', 'not implemented' }, |
337 | 874 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
875 | type = dns.type, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
876 | class = dns.class |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
877 | }; |
337 | 878 | |
879 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
880 | local function hint(p, s) -- - - - - - - - - - - - - - - - - - - - - - hint |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
881 | return (hints[s] and hints[s][p[s]]) or ''; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
882 | end |
337 | 883 | |
884 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
885 | function resolver.print(response) -- - - - - - - - - - - - - resolver.print |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
886 | for s,s in pairs { 'id', 'qr', 'opcode', 'aa', 'tc', 'rd', 'ra', 'z', |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
887 | 'rcode', 'qdcount', 'ancount', 'nscount', 'arcount' } do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
888 | print( string.format('%-30s', 'header.'..s), response.header[s], hint(response.header, s) ); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
889 | end |
337 | 890 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
891 | for i,question in ipairs(response.question) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
892 | print(string.format ('question[%i].name ', i), question.name); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
893 | print(string.format ('question[%i].type ', i), question.type); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
894 | print(string.format ('question[%i].class ', i), question.class); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
895 | end |
337 | 896 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
897 | local common = { name=1, type=1, class=1, ttl=1, rdlength=1, rdata=1 }; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
898 | local tmp; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
899 | for s,s in pairs({'answer', 'authority', 'additional'}) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
900 | for i,rr in pairs(response[s]) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
901 | for j,t in pairs({ 'name', 'type', 'class', 'ttl', 'rdlength' }) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
902 | tmp = string.format('%s[%i].%s', s, i, t); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
903 | print(string.format('%-30s', tmp), rr[t], hint(rr, t)); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
904 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
905 | for j,t in pairs(rr) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
906 | if not common[j] then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
907 | tmp = string.format('%s[%i].%s', s, i, j); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
908 | print(string.format('%-30s %s', tostring(tmp), tostring(t))); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
909 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
910 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
911 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
912 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
913 | end |
337 | 914 | |
915 | ||
916 | -- module api ------------------------------------------------------ module api | |
917 | ||
918 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
919 | local function resolve(func, ...) -- - - - - - - - - - - - - - resolver_get |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
920 | return func(dns._resolver, ...); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
921 | end |
337 | 922 | |
923 | ||
924 | function dns.resolver () -- - - - - - - - - - - - - - - - - - - - - resolver | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
925 | -- this function seems to be redundant with resolver.new () |
337 | 926 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
927 | local r = { active = {}, cache = {}, unsorted = {}, wanted = {}, yielded = {}, best_server = 1 }; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
928 | setmetatable (r, resolver); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
929 | setmetatable (r.cache, cache_metatable); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
930 | setmetatable (r.unsorted, { __mode = 'kv' }); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
931 | return r; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
932 | end |
337 | 933 | |
934 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
935 | function dns.lookup(...) -- - - - - - - - - - - - - - - - - - - - - lookup |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
936 | return resolve(resolver.lookup, ...); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
937 | end |
337 | 938 | |
939 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
940 | function dns.purge(...) -- - - - - - - - - - - - - - - - - - - - - - purge |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
941 | return resolve(resolver.purge, ...); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
942 | end |
337 | 943 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
944 | function dns.peek(...) -- - - - - - - - - - - - - - - - - - - - - - - peek |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
945 | return resolve(resolver.peek, ...); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
946 | end |
337 | 947 | |
948 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
949 | function dns.query(...) -- - - - - - - - - - - - - - - - - - - - - - query |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
950 | return resolve(resolver.query, ...); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
951 | end |
337 | 952 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
953 | function dns.feed(...) -- - - - - - - - - - - - - - - - - - - - - - feed |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
954 | return resolve(resolver.feed, ...); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
955 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
956 | |
1202
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
957 | function dns.cancel(...) -- - - - - - - - - - - - - - - - - - - - - - cancel |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
958 | return resolve(resolver.cancel, ...); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
959 | end |
337 | 960 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
961 | function dns:socket_wrapper_set(...) -- - - - - - - - - socket_wrapper_set |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
962 | return resolve(resolver.socket_wrapper_set, ...); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
963 | end |
337 | 964 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
965 | dns._resolver = dns.resolver(); |
337 | 966 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
967 | return dns; |