Mon, 05 Jul 2010 12:05:46 +0100
net.dns, net.adns: Update resolver:cancel() API so that a table doesn't need to be created for each cancellation internal to net.dns
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Remove version number from copyright headers
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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 timer = require "util.timer"; |
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20 | |
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21 | local _, windows = pcall(require, "util.windows"); |
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22 | local is_windows = (_ and windows) or os.getenv("WINDIR"); |
337 | 23 | |
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24 | local coroutine, io, math, string, table = |
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25 | coroutine, io, math, string, table; |
337 | 26 | |
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27 | local ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack = |
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28 | ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack; |
337 | 29 | |
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30 | local get, set = ztact.get, ztact.set; |
337 | 31 | |
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32 | local dns_timeout = 15; |
337 | 33 | |
34 | -------------------------------------------------- module dns | |
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35 | module('dns') |
337 | 36 | local dns = _M; |
37 | ||
38 | ||
39 | -- dns type & class codes ------------------------------ dns type & class codes | |
40 | ||
41 | ||
42 | local append = table.insert | |
43 | ||
44 | ||
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45 | local function highbyte(i) -- - - - - - - - - - - - - - - - - - - highbyte |
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46 | return (i-(i%0x100))/0x100; |
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47 | end |
337 | 48 | |
49 | ||
50 | local function augment (t) -- - - - - - - - - - - - - - - - - - - - augment | |
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51 | local a = {}; |
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52 | for i,s in pairs(t) do |
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53 | a[i] = s; |
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54 | a[s] = s; |
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55 | a[string.lower(s)] = s; |
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56 | end |
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57 | return a; |
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58 | end |
337 | 59 | |
60 | ||
61 | local function encode (t) -- - - - - - - - - - - - - - - - - - - - - encode | |
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62 | local code = {}; |
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63 | for i,s in pairs(t) do |
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64 | local word = string.char(highbyte(i), i%0x100); |
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65 | code[i] = word; |
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66 | code[s] = word; |
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67 | code[string.lower(s)] = word; |
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68 | end |
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69 | return code; |
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70 | end |
337 | 71 | |
72 | ||
73 | dns.types = { | |
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74 | 'A', 'NS', 'MD', 'MF', 'CNAME', 'SOA', 'MB', 'MG', 'MR', 'NULL', 'WKS', |
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75 | 'PTR', 'HINFO', 'MINFO', 'MX', 'TXT', |
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76 | [ 28] = 'AAAA', [ 29] = 'LOC', [ 33] = 'SRV', |
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77 | [252] = 'AXFR', [253] = 'MAILB', [254] = 'MAILA', [255] = '*' }; |
337 | 78 | |
79 | ||
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80 | dns.classes = { 'IN', 'CS', 'CH', 'HS', [255] = '*' }; |
337 | 81 | |
82 | ||
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83 | dns.type = augment (dns.types); |
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84 | dns.class = augment (dns.classes); |
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85 | dns.typecode = encode (dns.types); |
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86 | dns.classcode = encode (dns.classes); |
337 | 87 | |
88 | ||
89 | ||
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90 | local function standardize(qname, qtype, qclass) -- - - - - - - standardize |
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91 | if string.byte(qname, -1) ~= 0x2E then qname = qname..'.'; end |
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92 | qname = string.lower(qname); |
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93 | return qname, dns.type[qtype or 'A'], dns.class[qclass or 'IN']; |
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94 | end |
337 | 95 | |
96 | ||
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97 | local function prune(rrs, time, soft) -- - - - - - - - - - - - - - - prune |
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98 | time = time or socket.gettime(); |
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99 | for i,rr in pairs(rrs) do |
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100 | if rr.tod then |
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101 | -- rr.tod = rr.tod - 50 -- accelerated decripitude |
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102 | rr.ttl = math.floor(rr.tod - time); |
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103 | if rr.ttl <= 0 then |
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104 | table.remove(rrs, i); |
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105 | return prune(rrs, time, soft); -- Re-iterate |
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106 | end |
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107 | elseif soft == 'soft' then -- What is this? I forget! |
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108 | assert(rr.ttl == 0); |
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109 | rrs[i] = nil; |
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110 | end |
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111 | end |
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112 | end |
337 | 113 | |
114 | ||
115 | -- metatables & co. ------------------------------------------ metatables & co. | |
116 | ||
117 | ||
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118 | local resolver = {}; |
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119 | resolver.__index = resolver; |
337 | 120 | |
121 | ||
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122 | local SRV_tostring; |
337 | 123 | |
124 | ||
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125 | local rr_metatable = {}; -- - - - - - - - - - - - - - - - - - - rr_metatable |
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126 | function rr_metatable.__tostring(rr) |
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127 | local s0 = string.format('%2s %-5s %6i %-28s', rr.class, rr.type, rr.ttl, rr.name); |
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128 | local s1 = ''; |
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129 | if rr.type == 'A' then |
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130 | s1 = ' '..rr.a; |
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131 | elseif rr.type == 'MX' then |
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132 | s1 = string.format(' %2i %s', rr.pref, rr.mx); |
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133 | elseif rr.type == 'CNAME' then |
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134 | s1 = ' '..rr.cname; |
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135 | elseif rr.type == 'LOC' then |
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136 | s1 = ' '..resolver.LOC_tostring(rr); |
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137 | elseif rr.type == 'NS' then |
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138 | s1 = ' '..rr.ns; |
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139 | elseif rr.type == 'SRV' then |
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140 | s1 = ' '..SRV_tostring(rr); |
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141 | elseif rr.type == 'TXT' then |
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142 | s1 = ' '..rr.txt; |
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143 | else |
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144 | s1 = ' <UNKNOWN RDATA TYPE>'; |
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145 | end |
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146 | return s0..s1; |
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147 | end |
337 | 148 | |
149 | ||
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150 | local rrs_metatable = {}; -- - - - - - - - - - - - - - - - - - rrs_metatable |
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151 | function rrs_metatable.__tostring(rrs) |
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152 | local t = {}; |
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153 | for i,rr in pairs(rrs) do |
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154 | append(t, tostring(rr)..'\n'); |
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155 | end |
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156 | return table.concat(t); |
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157 | end |
337 | 158 | |
159 | ||
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160 | local cache_metatable = {}; -- - - - - - - - - - - - - - - - cache_metatable |
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161 | function cache_metatable.__tostring(cache) |
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162 | local time = socket.gettime(); |
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163 | local t = {}; |
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164 | for class,types in pairs(cache) do |
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165 | for type,names in pairs(types) do |
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166 | for name,rrs in pairs(names) do |
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167 | prune(rrs, time); |
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168 | append(t, tostring(rrs)); |
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169 | end |
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170 | end |
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171 | end |
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172 | return table.concat(t); |
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173 | end |
337 | 174 | |
175 | ||
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176 | function resolver:new() -- - - - - - - - - - - - - - - - - - - - - resolver |
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177 | local r = { active = {}, cache = {}, unsorted = {} }; |
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178 | setmetatable(r, resolver); |
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179 | setmetatable(r.cache, cache_metatable); |
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180 | setmetatable(r.unsorted, { __mode = 'kv' }); |
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181 | return r; |
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182 | end |
337 | 183 | |
184 | ||
185 | -- packet layer -------------------------------------------------- packet layer | |
186 | ||
187 | ||
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188 | function dns.random(...) -- - - - - - - - - - - - - - - - - - - dns.random |
2425
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189 | math.randomseed(math.floor(10000*socket.gettime())); |
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190 | dns.random = math.random; |
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191 | return dns.random(...); |
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192 | end |
337 | 193 | |
194 | ||
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195 | local function encodeHeader(o) -- - - - - - - - - - - - - - - encodeHeader |
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196 | o = o or {}; |
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197 | o.id = o.id or dns.random(0, 0xffff); -- 16b (random) id |
337 | 198 | |
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199 | o.rd = o.rd or 1; -- 1b 1 recursion desired |
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200 | o.tc = o.tc or 0; -- 1b 1 truncated response |
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201 | o.aa = o.aa or 0; -- 1b 1 authoritative response |
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202 | o.opcode = o.opcode or 0; -- 4b 0 query |
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203 | -- 1 inverse query |
337 | 204 | -- 2 server status request |
205 | -- 3-15 reserved | |
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206 | o.qr = o.qr or 0; -- 1b 0 query, 1 response |
337 | 207 | |
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208 | o.rcode = o.rcode or 0; -- 4b 0 no error |
337 | 209 | -- 1 format error |
210 | -- 2 server failure | |
211 | -- 3 name error | |
212 | -- 4 not implemented | |
213 | -- 5 refused | |
214 | -- 6-15 reserved | |
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215 | o.z = o.z or 0; -- 3b 0 resvered |
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216 | o.ra = o.ra or 0; -- 1b 1 recursion available |
337 | 217 | |
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218 | o.qdcount = o.qdcount or 1; -- 16b number of question RRs |
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219 | o.ancount = o.ancount or 0; -- 16b number of answers RRs |
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220 | o.nscount = o.nscount or 0; -- 16b number of nameservers RRs |
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221 | o.arcount = o.arcount or 0; -- 16b number of additional RRs |
337 | 222 | |
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223 | -- string.char() rounds, so prevent roundup with -0.4999 |
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224 | local header = string.char( |
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225 | highbyte(o.id), o.id %0x100, |
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226 | o.rd + 2*o.tc + 4*o.aa + 8*o.opcode + 128*o.qr, |
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227 | o.rcode + 16*o.z + 128*o.ra, |
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228 | highbyte(o.qdcount), o.qdcount %0x100, |
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229 | highbyte(o.ancount), o.ancount %0x100, |
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230 | highbyte(o.nscount), o.nscount %0x100, |
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231 | highbyte(o.arcount), o.arcount %0x100 |
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232 | ); |
337 | 233 | |
2070
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234 | return header, o.id; |
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235 | end |
337 | 236 | |
237 | ||
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238 | local function encodeName(name) -- - - - - - - - - - - - - - - - encodeName |
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239 | local t = {}; |
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240 | for part in string.gmatch(name, '[^.]+') do |
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241 | append(t, string.char(string.len(part))); |
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242 | append(t, part); |
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243 | end |
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244 | append(t, string.char(0)); |
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245 | return table.concat(t); |
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246 | end |
337 | 247 | |
248 | ||
2070
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249 | local function encodeQuestion(qname, qtype, qclass) -- - - - encodeQuestion |
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250 | qname = encodeName(qname); |
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251 | qtype = dns.typecode[qtype or 'a']; |
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252 | qclass = dns.classcode[qclass or 'in']; |
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253 | return qname..qtype..qclass; |
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254 | end |
337 | 255 | |
256 | ||
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257 | function resolver:byte(len) -- - - - - - - - - - - - - - - - - - - - - byte |
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258 | len = len or 1; |
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259 | local offset = self.offset; |
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260 | local last = offset + len - 1; |
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261 | if last > #self.packet then |
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262 | error(string.format('out of bounds: %i>%i', last, #self.packet)); |
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263 | end |
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264 | self.offset = offset + len; |
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265 | return string.byte(self.packet, offset, last); |
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266 | end |
337 | 267 | |
268 | ||
2070
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269 | function resolver:word() -- - - - - - - - - - - - - - - - - - - - - - word |
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270 | local b1, b2 = self:byte(2); |
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271 | return 0x100*b1 + b2; |
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272 | end |
337 | 273 | |
274 | ||
275 | function resolver:dword () -- - - - - - - - - - - - - - - - - - - - - dword | |
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276 | local b1, b2, b3, b4 = self:byte(4); |
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277 | --print('dword', b1, b2, b3, b4); |
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278 | return 0x1000000*b1 + 0x10000*b2 + 0x100*b3 + b4; |
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279 | end |
337 | 280 | |
281 | ||
2070
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282 | function resolver:sub(len) -- - - - - - - - - - - - - - - - - - - - - - sub |
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283 | len = len or 1; |
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284 | local s = string.sub(self.packet, self.offset, self.offset + len - 1); |
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285 | self.offset = self.offset + len; |
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286 | return s; |
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287 | end |
337 | 288 | |
289 | ||
2070
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290 | function resolver:header(force) -- - - - - - - - - - - - - - - - - - header |
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291 | local id = self:word(); |
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292 | --print(string.format(':header id %x', id)); |
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293 | if not self.active[id] and not force then return nil; end |
337 | 294 | |
2070
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295 | local h = { id = id }; |
337 | 296 | |
2070
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297 | local b1, b2 = self:byte(2); |
337 | 298 | |
2070
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299 | h.rd = b1 %2; |
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300 | h.tc = b1 /2%2; |
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301 | h.aa = b1 /4%2; |
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302 | h.opcode = b1 /8%16; |
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303 | h.qr = b1 /128; |
337 | 304 | |
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305 | h.rcode = b2 %16; |
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306 | h.z = b2 /16%8; |
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307 | h.ra = b2 /128; |
337 | 308 | |
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309 | h.qdcount = self:word(); |
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310 | h.ancount = self:word(); |
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311 | h.nscount = self:word(); |
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312 | h.arcount = self:word(); |
337 | 313 | |
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314 | for k,v in pairs(h) do h[k] = v-v%1; end |
337 | 315 | |
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316 | return h; |
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317 | end |
337 | 318 | |
319 | ||
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320 | function resolver:name() -- - - - - - - - - - - - - - - - - - - - - - name |
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321 | local remember, pointers = nil, 0; |
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322 | local len = self:byte(); |
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323 | local n = {}; |
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324 | while len > 0 do |
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325 | if len >= 0xc0 then -- name is "compressed" |
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326 | pointers = pointers + 1; |
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327 | if pointers >= 20 then error('dns error: 20 pointers'); end; |
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328 | local offset = ((len-0xc0)*0x100) + self:byte(); |
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329 | remember = remember or self.offset; |
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330 | self.offset = offset + 1; -- +1 for lua |
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331 | else -- name is not compressed |
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332 | append(n, self:sub(len)..'.'); |
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333 | end |
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334 | len = self:byte(); |
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335 | end |
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336 | self.offset = remember or self.offset; |
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337 | return table.concat(n); |
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338 | end |
337 | 339 | |
340 | ||
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341 | function resolver:question() -- - - - - - - - - - - - - - - - - - question |
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342 | local q = {}; |
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343 | q.name = self:name(); |
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344 | q.type = dns.type[self:word()]; |
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345 | q.class = dns.class[self:word()]; |
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346 | return q; |
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347 | end |
337 | 348 | |
349 | ||
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350 | function resolver:A(rr) -- - - - - - - - - - - - - - - - - - - - - - - - A |
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351 | local b1, b2, b3, b4 = self:byte(4); |
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352 | rr.a = string.format('%i.%i.%i.%i', b1, b2, b3, b4); |
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353 | end |
337 | 354 | |
355 | ||
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356 | function resolver:CNAME(rr) -- - - - - - - - - - - - - - - - - - - - CNAME |
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357 | rr.cname = self:name(); |
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358 | end |
337 | 359 | |
360 | ||
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361 | function resolver:MX(rr) -- - - - - - - - - - - - - - - - - - - - - - - MX |
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362 | rr.pref = self:word(); |
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363 | rr.mx = self:name(); |
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364 | end |
337 | 365 | |
366 | ||
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367 | function resolver:LOC_nibble_power() -- - - - - - - - - - LOC_nibble_power |
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368 | local b = self:byte(); |
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369 | --print('nibbles', ((b-(b%0x10))/0x10), (b%0x10)); |
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370 | return ((b-(b%0x10))/0x10) * (10^(b%0x10)); |
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371 | end |
337 | 372 | |
373 | ||
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374 | function resolver:LOC(rr) -- - - - - - - - - - - - - - - - - - - - - - LOC |
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375 | rr.version = self:byte(); |
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376 | if rr.version == 0 then |
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377 | rr.loc = rr.loc or {}; |
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378 | rr.loc.size = self:LOC_nibble_power(); |
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379 | rr.loc.horiz_pre = self:LOC_nibble_power(); |
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380 | rr.loc.vert_pre = self:LOC_nibble_power(); |
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381 | rr.loc.latitude = self:dword(); |
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382 | rr.loc.longitude = self:dword(); |
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383 | rr.loc.altitude = self:dword(); |
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384 | end |
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385 | end |
337 | 386 | |
387 | ||
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388 | local function LOC_tostring_degrees(f, pos, neg) -- - - - - - - - - - - - - |
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389 | f = f - 0x80000000; |
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390 | if f < 0 then pos = neg; f = -f; end |
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391 | local deg, min, msec; |
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392 | msec = f%60000; |
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393 | f = (f-msec)/60000; |
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394 | min = f%60; |
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395 | deg = (f-min)/60; |
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396 | return string.format('%3d %2d %2.3f %s', deg, min, msec/1000, pos); |
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397 | end |
337 | 398 | |
399 | ||
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400 | function resolver.LOC_tostring(rr) -- - - - - - - - - - - - - LOC_tostring |
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401 | local t = {}; |
337 | 402 | |
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403 | --[[ |
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404 | for k,name in pairs { 'size', 'horiz_pre', 'vert_pre', 'latitude', 'longitude', 'altitude' } do |
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405 | append(t, string.format('%4s%-10s: %12.0f\n', '', name, rr.loc[name])); |
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406 | end |
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407 | --]] |
337 | 408 | |
2070
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409 | append(t, string.format( |
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410 | '%s %s %.2fm %.2fm %.2fm %.2fm', |
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411 | LOC_tostring_degrees (rr.loc.latitude, 'N', 'S'), |
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412 | LOC_tostring_degrees (rr.loc.longitude, 'E', 'W'), |
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413 | (rr.loc.altitude - 10000000) / 100, |
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414 | rr.loc.size / 100, |
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415 | rr.loc.horiz_pre / 100, |
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416 | rr.loc.vert_pre / 100 |
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417 | )); |
337 | 418 | |
2070
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419 | return table.concat(t); |
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420 | end |
337 | 421 | |
422 | ||
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423 | function resolver:NS(rr) -- - - - - - - - - - - - - - - - - - - - - - - NS |
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424 | rr.ns = self:name(); |
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425 | end |
337 | 426 | |
427 | ||
2070
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428 | function resolver:SOA(rr) -- - - - - - - - - - - - - - - - - - - - - - SOA |
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429 | end |
337 | 430 | |
431 | ||
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|
432 | function resolver:SRV(rr) -- - - - - - - - - - - - - - - - - - - - - - SRV |
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|
433 | rr.srv = {}; |
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|
434 | rr.srv.priority = self:word(); |
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|
435 | rr.srv.weight = self:word(); |
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|
436 | rr.srv.port = self:word(); |
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|
437 | rr.srv.target = self:name(); |
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|
438 | end |
337 | 439 | |
440 | ||
2070
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|
441 | function SRV_tostring(rr) -- - - - - - - - - - - - - - - - - - SRV_tostring |
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|
442 | local s = rr.srv; |
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|
443 | return string.format( '%5d %5d %5d %s', s.priority, s.weight, s.port, s.target ); |
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444 | end |
337 | 445 | |
446 | ||
2070
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|
447 | function resolver:TXT(rr) -- - - - - - - - - - - - - - - - - - - - - - TXT |
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Waqas Hussain <waqas20@gmail.com>
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|
448 | rr.txt = self:sub (rr.rdlength); |
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|
449 | end |
337 | 450 | |
451 | ||
2070
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|
452 | function resolver:rr() -- - - - - - - - - - - - - - - - - - - - - - - - rr |
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|
453 | local rr = {}; |
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Waqas Hussain <waqas20@gmail.com>
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|
454 | setmetatable(rr, rr_metatable); |
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|
455 | rr.name = self:name(self); |
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Waqas Hussain <waqas20@gmail.com>
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|
456 | rr.type = dns.type[self:word()] or rr.type; |
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Waqas Hussain <waqas20@gmail.com>
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|
457 | rr.class = dns.class[self:word()] or rr.class; |
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Waqas Hussain <waqas20@gmail.com>
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|
458 | rr.ttl = 0x10000*self:word() + self:word(); |
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|
459 | rr.rdlength = self:word(); |
337 | 460 | |
2070
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|
461 | if rr.ttl <= 0 then |
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|
462 | rr.tod = self.time + 30; |
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|
463 | else |
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changeset
|
464 | rr.tod = self.time + rr.ttl; |
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465 | end |
337 | 466 | |
2070
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|
467 | local remember = self.offset; |
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|
468 | local rr_parser = self[dns.type[rr.type]]; |
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|
469 | if rr_parser then rr_parser(self, rr); end |
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|
470 | self.offset = remember; |
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|
471 | rr.rdata = self:sub(rr.rdlength); |
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472 | return rr; |
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|
473 | end |
337 | 474 | |
475 | ||
476 | function resolver:rrs (count) -- - - - - - - - - - - - - - - - - - - - - rrs | |
2070
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477 | local rrs = {}; |
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478 | for i = 1,count do append(rrs, self:rr()); end |
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479 | return rrs; |
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480 | end |
337 | 481 | |
482 | ||
2070
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changeset
|
483 | function resolver:decode(packet, force) -- - - - - - - - - - - - - - decode |
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|
484 | self.packet, self.offset = packet, 1; |
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|
485 | local header = self:header(force); |
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486 | if not header then return nil; end |
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|
487 | local response = { header = header }; |
337 | 488 | |
2070
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|
489 | response.question = {}; |
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|
490 | local offset = self.offset; |
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Waqas Hussain <waqas20@gmail.com>
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changeset
|
491 | for i = 1,response.header.qdcount do |
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Waqas Hussain <waqas20@gmail.com>
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|
492 | append(response.question, self:question()); |
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Waqas Hussain <waqas20@gmail.com>
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493 | end |
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|
494 | response.question.raw = string.sub(self.packet, offset, self.offset - 1); |
337 | 495 | |
2070
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|
496 | if not force then |
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diff
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|
497 | if not self.active[response.header.id] or not self.active[response.header.id][response.question.raw] then |
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|
498 | return nil; |
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Waqas Hussain <waqas20@gmail.com>
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|
499 | end |
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|
500 | end |
337 | 501 | |
2070
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diff
changeset
|
502 | response.answer = self:rrs(response.header.ancount); |
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Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
503 | response.authority = self:rrs(response.header.nscount); |
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Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
504 | response.additional = self:rrs(response.header.arcount); |
337 | 505 | |
2070
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diff
changeset
|
506 | return response; |
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|
507 | end |
337 | 508 | |
509 | ||
510 | -- socket layer -------------------------------------------------- socket layer | |
511 | ||
512 | ||
2070
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parents:
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diff
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|
513 | resolver.delays = { 1, 3 }; |
337 | 514 | |
515 | ||
2070
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changeset
|
516 | function resolver:addnameserver(address) -- - - - - - - - - - addnameserver |
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|
517 | self.server = self.server or {}; |
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|
518 | append(self.server, address); |
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|
519 | end |
337 | 520 | |
521 | ||
2070
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diff
changeset
|
522 | function resolver:setnameserver(address) -- - - - - - - - - - setnameserver |
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diff
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|
523 | self.server = {}; |
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diff
changeset
|
524 | self:addnameserver(address); |
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diff
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|
525 | end |
337 | 526 | |
527 | ||
2070
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diff
changeset
|
528 | function resolver:adddefaultnameservers() -- - - - - adddefaultnameservers |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
529 | if is_windows then |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
530 | if windows then |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
531 | for _, server in ipairs(windows.get_nameservers()) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
532 | self:addnameserver(server); |
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diff
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|
533 | end |
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Waqas Hussain <waqas20@gmail.com>
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|
534 | end |
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diff
changeset
|
535 | 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
|
536 | -- TODO log warning about no nameservers, adding opendns servers as fallback |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
537 | self:addnameserver("208.67.222.222"); |
2741
6c0a081cd766
net.dns: Trailing whitespace
Matthew Wild <mwild1@gmail.com>
parents:
2740
diff
changeset
|
538 | self:addnameserver("208.67.220.220"); |
2070
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diff
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|
539 | end |
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diff
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|
540 | else -- posix |
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Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
541 | local resolv_conf = io.open("/etc/resolv.conf"); |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
542 | if resolv_conf then |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
543 | for line in resolv_conf:lines() do |
2740
fcd30b72c50c
net.dns: More reliable parsing of resolv.conf - allow multiple nameserver IPs on one line (thanks dersd)
Matthew Wild <mwild1@gmail.com>
parents:
2620
diff
changeset
|
544 | line = line:gsub("#.*$", "") |
fcd30b72c50c
net.dns: More reliable parsing of resolv.conf - allow multiple nameserver IPs on one line (thanks dersd)
Matthew Wild <mwild1@gmail.com>
parents:
2620
diff
changeset
|
545 | :match('^%s*nameserver%s+(.*)%s*$'); |
fcd30b72c50c
net.dns: More reliable parsing of resolv.conf - allow multiple nameserver IPs on one line (thanks dersd)
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
546 | if line then |
fcd30b72c50c
net.dns: More reliable parsing of resolv.conf - allow multiple nameserver IPs on one line (thanks dersd)
Matthew Wild <mwild1@gmail.com>
parents:
2620
diff
changeset
|
547 | line:gsub("%f[%d.](%d+%.%d+%.%d+%.%d+)%f[^%d.]", function (address) |
fcd30b72c50c
net.dns: More reliable parsing of resolv.conf - allow multiple nameserver IPs on one line (thanks dersd)
Matthew Wild <mwild1@gmail.com>
parents:
2620
diff
changeset
|
548 | self:addnameserver(address) |
fcd30b72c50c
net.dns: More reliable parsing of resolv.conf - allow multiple nameserver IPs on one line (thanks dersd)
Matthew Wild <mwild1@gmail.com>
parents:
2620
diff
changeset
|
549 | end); |
fcd30b72c50c
net.dns: More reliable parsing of resolv.conf - allow multiple nameserver IPs on one line (thanks dersd)
Matthew Wild <mwild1@gmail.com>
parents:
2620
diff
changeset
|
550 | end |
2070
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parents:
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diff
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|
551 | end |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
552 | end |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
553 | 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
|
554 | -- TODO log warning about no nameservers, adding localhost as the default nameserver |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
555 | self:addnameserver("127.0.0.1"); |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
556 | end |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
557 | end |
399
93b6587d9afb
Added temporary fix for srv on windows: using opendns nameservers
Waqas Hussain <waqas20@gmail.com>
parents:
379
diff
changeset
|
558 | end |
337 | 559 | |
560 | ||
2070
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
561 | function resolver:getsocket(servernum) -- - - - - - - - - - - - - getsocket |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
562 | self.socket = self.socket or {}; |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
563 | self.socketset = self.socketset or {}; |
337 | 564 | |
2070
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net.dns: Fixed indentation and coding style.
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parents:
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diff
changeset
|
565 | local sock = self.socket[servernum]; |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
566 | if sock then return sock; end |
337 | 567 | |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
568 | sock = socket.udp(); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
569 | 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
|
570 | sock:settimeout(0); |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
571 | -- todo: attempt to use a random port, fallback to 0 |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
572 | sock:setsockname('*', 0); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
573 | sock:setpeername(self.server[servernum], 53); |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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changeset
|
574 | self.socket[servernum] = sock; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
575 | self.socketset[sock] = servernum; |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
576 | 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:
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diff
changeset
|
577 | end |
337 | 578 | |
2070
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net.dns: Fixed indentation and coding style.
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parents:
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diff
changeset
|
579 | function resolver:voidsocket(sock) |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
580 | 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
|
581 | self.socketset[self.socket[sock]] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
582 | self.socket[sock] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
583 | 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
|
584 | 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
|
585 | self.socketset[sock] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
586 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
587 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
588 | |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
589 | function resolver:socket_wrapper_set(func) -- - - - - - - socket_wrapper_set |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
590 | self.socket_wrapper = func; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
591 | end |
337 | 592 | |
593 | ||
594 | function resolver:closeall () -- - - - - - - - - - - - - - - - - - closeall | |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
595 | for i,sock in ipairs(self.socket) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
596 | self.socket[i] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
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parents:
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diff
changeset
|
597 | 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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diff
changeset
|
598 | sock:close(); |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
599 | end |
72357b1c6d88
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parents:
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diff
changeset
|
600 | end |
337 | 601 | |
602 | ||
2070
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net.dns: Fixed indentation and coding style.
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parents:
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diff
changeset
|
603 | function resolver:remember(rr, type) -- - - - - - - - - - - - - - remember |
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
604 | --print ('remember', type, rr.class, rr.type, rr.name) |
2620
481c6724818f
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:
2619
diff
changeset
|
605 | local qname, qtype, qclass = standardize(rr.name, rr.type, rr.class); |
337 | 606 | |
2070
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
607 | if type ~= '*' then |
2620
481c6724818f
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:
2619
diff
changeset
|
608 | type = qtype; |
481c6724818f
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:
2619
diff
changeset
|
609 | 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:
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diff
changeset
|
610 | --print('remember all', all); |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
611 | if all then append(all, rr); end |
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
612 | end |
337 | 613 | |
2070
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parents:
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changeset
|
614 | self.cache = self.cache or setmetatable({}, cache_metatable); |
2620
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Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
615 | local rrs = get(self.cache, qclass, type, qname) or |
481c6724818f
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parents:
2619
diff
changeset
|
616 | set(self.cache, qclass, type, qname, setmetatable({}, rrs_metatable)); |
2070
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parents:
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diff
changeset
|
617 | append(rrs, rr); |
337 | 618 | |
2070
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parents:
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changeset
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619 | if type == 'MX' then self.unsorted[rrs] = true; end |
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changeset
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620 | end |
337 | 621 | |
622 | ||
2070
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diff
changeset
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623 | local function comp_mx(a, b) -- - - - - - - - - - - - - - - - - - - comp_mx |
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624 | return (a.pref == b.pref) and (a.mx < b.mx) or (a.pref < b.pref); |
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625 | end |
337 | 626 | |
627 | ||
628 | function resolver:peek (qname, qtype, qclass) -- - - - - - - - - - - - peek | |
2070
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629 | qname, qtype, qclass = standardize(qname, qtype, qclass); |
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changeset
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630 | local rrs = get(self.cache, qclass, qtype, qname); |
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631 | if not rrs then return nil; end |
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632 | if prune(rrs, socket.gettime()) and qtype == '*' or not next(rrs) then |
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|
633 | set(self.cache, qclass, qtype, qname, nil); |
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634 | return nil; |
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635 | end |
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changeset
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636 | if self.unsorted[rrs] then table.sort (rrs, comp_mx); end |
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changeset
|
637 | return rrs; |
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changeset
|
638 | end |
337 | 639 | |
640 | ||
2070
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|
641 | function resolver:purge(soft) -- - - - - - - - - - - - - - - - - - - purge |
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diff
changeset
|
642 | if soft == 'soft' then |
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|
643 | self.time = socket.gettime(); |
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|
644 | for class,types in pairs(self.cache or {}) do |
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changeset
|
645 | for type,names in pairs(types) do |
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|
646 | for name,rrs in pairs(names) do |
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parents:
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changeset
|
647 | prune(rrs, self.time, 'soft') |
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Waqas Hussain <waqas20@gmail.com>
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648 | end |
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Waqas Hussain <waqas20@gmail.com>
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|
649 | end |
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Waqas Hussain <waqas20@gmail.com>
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|
650 | end |
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Waqas Hussain <waqas20@gmail.com>
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|
651 | else self.cache = {}; end |
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Waqas Hussain <waqas20@gmail.com>
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|
652 | end |
337 | 653 | |
654 | ||
2070
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parents:
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diff
changeset
|
655 | function resolver:query(qname, qtype, qclass) -- - - - - - - - - - -- query |
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
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|
656 | qname, qtype, qclass = standardize(qname, qtype, qclass) |
337 | 657 | |
2070
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parents:
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|
658 | if not self.server then self:adddefaultnameservers(); end |
337 | 659 | |
2070
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Waqas Hussain <waqas20@gmail.com>
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|
660 | local question = encodeQuestion(qname, qtype, qclass); |
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|
661 | local peek = self:peek (qname, qtype, qclass); |
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|
662 | if peek then return peek; end |
337 | 663 | |
2070
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|
664 | local header, id = encodeHeader(); |
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parents:
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diff
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|
665 | --print ('query id', id, qclass, qtype, qname) |
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parents:
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|
666 | local o = { |
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|
667 | packet = header..question, |
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parents:
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diff
changeset
|
668 | server = self.best_server, |
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|
669 | delay = 1, |
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parents:
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|
670 | retry = socket.gettime() + self.delays[1] |
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|
671 | }; |
337 | 672 | |
673 | -- remember the query | |
2070
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|
674 | self.active[id] = self.active[id] or {}; |
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Waqas Hussain <waqas20@gmail.com>
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changeset
|
675 | self.active[id][question] = o; |
337 | 676 | |
677 | -- remember which coroutine wants the answer | |
2070
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|
678 | local co = coroutine.running(); |
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|
679 | if co then |
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changeset
|
680 | set(self.wanted, qclass, qtype, qname, co, true); |
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parents:
2068
diff
changeset
|
681 | --set(self.yielded, co, qclass, qtype, qname, true); |
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682 | end |
1786
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parents:
1523
diff
changeset
|
683 | |
3324
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parents:
3057
diff
changeset
|
684 | local conn = self:getsocket(o.server) |
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|
685 | conn:send (o.packet) |
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diff
changeset
|
686 | |
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parents:
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687 | if timer then |
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parents:
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|
688 | local num_servers = #self.server; |
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|
689 | local i = 1; |
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parents:
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|
690 | timer.add_task(dns_timeout, function () |
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parents:
3057
diff
changeset
|
691 | if get(self.wanted, qclass, qtype, qname, co) then |
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|
692 | if i < num_servers then |
070c8ba71b76
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diff
changeset
|
693 | i = i + 1; |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
694 | self:servfail(conn); |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
695 | o.server = self.best_server; |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
696 | conn = self:getsocket(o.server); |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
697 | conn:send(o.packet); |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
698 | return dns_timeout; |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
699 | else |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
700 | -- Tried everything, failed |
3326
fb95015bc646
net.dns, net.adns: Update resolver:cancel() API so that a table doesn't need to be created for each cancellation internal to net.dns
Matthew Wild <mwild1@gmail.com>
parents:
3325
diff
changeset
|
701 | resolver:cancel(qclass, qtype, qname, co, true); |
3324
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
702 | end |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
703 | end |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
704 | end) |
070c8ba71b76
net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
Matthew Wild <mwild1@gmail.com>
parents:
3057
diff
changeset
|
705 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
706 | end |
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
707 | |
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 | function resolver:servfail(sock) |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
709 | -- Resend all queries for this server |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
710 | |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
711 | local num = self.socketset[sock] |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
712 | |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
713 | -- Socket is dead now |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
714 | self:voidsocket(sock); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
715 | |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
716 | -- Find all requests to the down server, and retry on the next server |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
717 | self.time = socket.gettime(); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
718 | 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
|
719 | for question,o in pairs(queries) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
720 | if o.server == num then -- This request was to the broken server |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
721 | o.server = o.server + 1 -- Use next server |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
722 | if o.server > #self.server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
723 | o.server = 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
724 | end |
337 | 725 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
726 | o.retries = (o.retries or 0) + 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
727 | if o.retries >= #self.server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
728 | --print('timeout'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
729 | queries[question] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
730 | else |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
731 | local _a = self:getsocket(o.server); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
732 | 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
|
733 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
734 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
735 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
736 | 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
|
737 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
738 | if num == self.best_server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
739 | self.best_server = self.best_server + 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
740 | if self.best_server > #self.server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
741 | -- Exhausted all servers, try first again |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
742 | self.best_server = 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
743 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
744 | 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
|
745 | end |
337 | 746 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
747 | function resolver:receive(rset) -- - - - - - - - - - - - - - - - - receive |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
748 | --print('receive'); print(self.socket); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
749 | self.time = socket.gettime(); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
750 | rset = rset or self.socket; |
337 | 751 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
752 | local response; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
753 | for i,sock in pairs(rset) do |
337 | 754 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
755 | if self.socketset[sock] then |
2619
04158baefa34
net.dns: Update for new socket API
Matthew Wild <mwild1@gmail.com>
parents:
2578
diff
changeset
|
756 | local packet = sock:receive(); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
757 | if packet then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
758 | response = self:decode(packet); |
2293
8c10f13c0c20
modulemanager, net.dns: Remove trailing whitespace
Matthew Wild <mwild1@gmail.com>
parents:
2082
diff
changeset
|
759 | if response and self.active[response.header.id] |
2081
b9bbb709d62e
net.dns: Be more strict about checking the DNS replies we receive
Matthew Wild <mwild1@gmail.com>
parents:
2070
diff
changeset
|
760 | 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
|
761 | --print('received response'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
762 | --self.print(response); |
337 | 763 | |
2082
1381b2071c2e
net.dns: Be more strict about the records we cache
Matthew Wild <mwild1@gmail.com>
parents:
2081
diff
changeset
|
764 | 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
|
765 | 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
|
766 | self:remember(rr, response.question[1].type) |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
767 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
768 | end |
337 | 769 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
770 | -- retire the query |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
771 | 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
|
772 | 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
|
773 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
774 | 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
|
775 | if not next(self.active) then self:closeall(); end |
337 | 776 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
777 | -- was the query on the wanted list? |
2301
8a01b0898679
net.dns: Fix for blocking dns lookups to find waiting coroutines correctly (not that we use this in Prosody...)
Matthew Wild <mwild1@gmail.com>
parents:
2300
diff
changeset
|
778 | local q = response.question[1]; |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
779 | 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
|
780 | if cos then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
781 | for co in pairs(cos) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
782 | 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
|
783 | 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
|
784 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
785 | 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
|
786 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
787 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
788 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
789 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
790 | end |
337 | 791 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
792 | return response; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
793 | end |
337 | 794 | |
795 | ||
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
796 | function resolver:feed(sock, packet) |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
797 | --print('receive'); print(self.socket); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
798 | 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
|
799 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
800 | local response = self:decode(packet); |
2300
e182b5029ef2
net.dns: Port some DNS fixes to the resolver:feed() function for net.adns to use
Matthew Wild <mwild1@gmail.com>
parents:
2293
diff
changeset
|
801 | if response and self.active[response.header.id] |
e182b5029ef2
net.dns: Port some DNS fixes to the resolver:feed() function for net.adns to use
Matthew Wild <mwild1@gmail.com>
parents:
2293
diff
changeset
|
802 | 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
|
803 | --print('received response'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
804 | --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
|
805 | |
2300
e182b5029ef2
net.dns: Port some DNS fixes to the resolver:feed() function for net.adns to use
Matthew Wild <mwild1@gmail.com>
parents:
2293
diff
changeset
|
806 | for j,rr in pairs(response.answer) do |
e182b5029ef2
net.dns: Port some DNS fixes to the resolver:feed() function for net.adns to use
Matthew Wild <mwild1@gmail.com>
parents:
2293
diff
changeset
|
807 | self:remember(rr, response.question[1].type); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
808 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
809 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
810 | -- retire the query |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
811 | local queries = self.active[response.header.id]; |
2300
e182b5029ef2
net.dns: Port some DNS fixes to the resolver:feed() function for net.adns to use
Matthew Wild <mwild1@gmail.com>
parents:
2293
diff
changeset
|
812 | queries[response.question.raw] = nil; |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
813 | 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
|
814 | 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
|
815 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
816 | -- was the query on the wanted list? |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
817 | local q = response.question[1]; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
818 | if q then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
819 | 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
|
820 | if cos then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
821 | for co in pairs(cos) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
822 | 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
|
823 | 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
|
824 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
825 | 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
|
826 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
827 | end |
2741
6c0a081cd766
net.dns: Trailing whitespace
Matthew Wild <mwild1@gmail.com>
parents:
2740
diff
changeset
|
828 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
829 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
830 | return response; |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
831 | end |
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
832 | |
3326
fb95015bc646
net.dns, net.adns: Update resolver:cancel() API so that a table doesn't need to be created for each cancellation internal to net.dns
Matthew Wild <mwild1@gmail.com>
parents:
3325
diff
changeset
|
833 | function resolver:cancel(qclass, qtype, qname, co, call_handler) |
fb95015bc646
net.dns, net.adns: Update resolver:cancel() API so that a table doesn't need to be created for each cancellation internal to net.dns
Matthew Wild <mwild1@gmail.com>
parents:
3325
diff
changeset
|
834 | local cos = get(self.wanted, qclass, qtype, qname); |
1202
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
835 | if cos then |
3325
b3117a1da834
net.dns, net.adns: Move coroutine-calling logic into resolver:cancel()
Matthew Wild <mwild1@gmail.com>
parents:
3324
diff
changeset
|
836 | if call_handler then |
3326
fb95015bc646
net.dns, net.adns: Update resolver:cancel() API so that a table doesn't need to be created for each cancellation internal to net.dns
Matthew Wild <mwild1@gmail.com>
parents:
3325
diff
changeset
|
837 | coroutine.resume(co); |
3325
b3117a1da834
net.dns, net.adns: Move coroutine-calling logic into resolver:cancel()
Matthew Wild <mwild1@gmail.com>
parents:
3324
diff
changeset
|
838 | end |
3326
fb95015bc646
net.dns, net.adns: Update resolver:cancel() API so that a table doesn't need to be created for each cancellation internal to net.dns
Matthew Wild <mwild1@gmail.com>
parents:
3325
diff
changeset
|
839 | cos[co] = nil; |
1202
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
840 | end |
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
894
diff
changeset
|
841 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
842 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
843 | function resolver:pulse() -- - - - - - - - - - - - - - - - - - - - - pulse |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
844 | --print(':pulse'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
845 | while self:receive() do end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
846 | if not next(self.active) then return nil; end |
337 | 847 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
848 | self.time = socket.gettime(); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
849 | 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
|
850 | for question,o in pairs(queries) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
851 | if self.time >= o.retry then |
337 | 852 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
853 | o.server = o.server + 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
854 | if o.server > #self.server then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
855 | o.server = 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
856 | o.delay = o.delay + 1; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
857 | end |
337 | 858 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
859 | if o.delay > #self.delays then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
860 | --print('timeout'); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
861 | queries[question] = nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
862 | 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
|
863 | 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
|
864 | else |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
865 | --print('retry', o.server, o.delay); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
866 | local _a = self.socket[o.server]; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
867 | 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
|
868 | 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
|
869 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
870 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
871 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
872 | end |
337 | 873 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
874 | 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
|
875 | return nil; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
876 | end |
337 | 877 | |
878 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
879 | function resolver:lookup(qname, qtype, qclass) -- - - - - - - - - - lookup |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
880 | self:query (qname, qtype, qclass) |
3049
e54774bd73a7
net/dns: Fix socket.select timeout.
Brian Cully <bjc@junctionnetworks.com>
parents:
2741
diff
changeset
|
881 | while self:pulse() do |
e54774bd73a7
net/dns: Fix socket.select timeout.
Brian Cully <bjc@junctionnetworks.com>
parents:
2741
diff
changeset
|
882 | local recvt = {} |
e54774bd73a7
net/dns: Fix socket.select timeout.
Brian Cully <bjc@junctionnetworks.com>
parents:
2741
diff
changeset
|
883 | for i, s in ipairs(self.socket) do |
3056
c585678b3ecb
net.dns: Fix dns.lookup from commit e54774bd73a7
Matthew Wild <mwild1@gmail.com>
parents:
3049
diff
changeset
|
884 | recvt[i] = s |
3049
e54774bd73a7
net/dns: Fix socket.select timeout.
Brian Cully <bjc@junctionnetworks.com>
parents:
2741
diff
changeset
|
885 | end |
e54774bd73a7
net/dns: Fix socket.select timeout.
Brian Cully <bjc@junctionnetworks.com>
parents:
2741
diff
changeset
|
886 | socket.select(recvt, nil, 4) |
e54774bd73a7
net/dns: Fix socket.select timeout.
Brian Cully <bjc@junctionnetworks.com>
parents:
2741
diff
changeset
|
887 | end |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
888 | --print(self.cache); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
889 | return self:peek(qname, qtype, qclass); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
890 | end |
337 | 891 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
892 | 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
|
893 | 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
|
894 | end |
337 | 895 | |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
896 | |
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
897 | --print ---------------------------------------------------------------- print |
337 | 898 | |
899 | ||
900 | local hints = { -- - - - - - - - - - - - - - - - - - - - - - - - - - - hints | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
901 | qr = { [0]='query', 'response' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
902 | 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
|
903 | aa = { [0]='non-authoritative', 'authoritative' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
904 | tc = { [0]='complete', 'truncated' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
905 | rd = { [0]='recursion not desired', 'recursion desired' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
906 | ra = { [0]='recursion not available', 'recursion available' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
907 | z = { [0]='(reserved)' }, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
908 | rcode = { [0]='no error', 'format error', 'server failure', 'name error', 'not implemented' }, |
337 | 909 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
910 | type = dns.type, |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
911 | class = dns.class |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
912 | }; |
337 | 913 | |
914 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
915 | local function hint(p, s) -- - - - - - - - - - - - - - - - - - - - - - hint |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
916 | 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
|
917 | end |
337 | 918 | |
919 | ||
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
920 | function resolver.print(response) -- - - - - - - - - - - - - resolver.print |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
921 | 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
|
922 | 'rcode', 'qdcount', 'ancount', 'nscount', 'arcount' } do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
923 | 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
|
924 | end |
337 | 925 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
926 | 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
|
927 | 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
|
928 | 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
|
929 | 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
|
930 | end |
337 | 931 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
932 | 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
|
933 | local tmp; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
934 | 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
|
935 | 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
|
936 | 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
|
937 | 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
|
938 | 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
|
939 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
940 | for j,t in pairs(rr) do |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
941 | if not common[j] then |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
942 | 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
|
943 | 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
|
944 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
945 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
946 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
947 | end |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
948 | end |
337 | 949 | |
950 | ||
951 | -- module api ------------------------------------------------------ module api | |
952 | ||
953 | ||
954 | function dns.resolver () -- - - - - - - - - - - - - - - - - - - - - resolver | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
955 | -- this function seems to be redundant with resolver.new () |
337 | 956 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
957 | 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
|
958 | setmetatable (r, resolver); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
959 | setmetatable (r.cache, cache_metatable); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
960 | setmetatable (r.unsorted, { __mode = 'kv' }); |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
961 | return r; |
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
962 | end |
337 | 963 | |
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
964 | local _resolver = dns.resolver(); |
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
965 | dns._resolver = _resolver; |
337 | 966 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
967 | function dns.lookup(...) -- - - - - - - - - - - - - - - - - - - - - lookup |
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
968 | return _resolver:lookup(...); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
969 | end |
337 | 970 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
971 | function dns.purge(...) -- - - - - - - - - - - - - - - - - - - - - - purge |
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
972 | return _resolver:purge(...); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
973 | end |
337 | 974 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
975 | function dns.peek(...) -- - - - - - - - - - - - - - - - - - - - - - - peek |
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
976 | return _resolver:peek(...); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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changeset
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977 | end |
337 | 978 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
979 | function dns.query(...) -- - - - - - - - - - - - - - - - - - - - - - query |
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
980 | return _resolver:query(...); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
981 | end |
337 | 982 | |
2575
8f4d69940132
net.dns: Fixed whitespace/indentation.
Waqas Hussain <waqas20@gmail.com>
parents:
2574
diff
changeset
|
983 | function dns.feed(...) -- - - - - - - - - - - - - - - - - - - - - - - feed |
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
984 | return _resolver:feed(...); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
985 | end |
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
986 | |
2575
8f4d69940132
net.dns: Fixed whitespace/indentation.
Waqas Hussain <waqas20@gmail.com>
parents:
2574
diff
changeset
|
987 | function dns.cancel(...) -- - - - - - - - - - - - - - - - - - - - - - cancel |
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
988 | return _resolver:cancel(...); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
989 | end |
337 | 990 | |
2578
61e5eff54415
net.dns, net.adns: Changed dns:socket_wrapper_set to dns.socket_wrapper_set for consistency.
Waqas Hussain <waqas20@gmail.com>
parents:
2575
diff
changeset
|
991 | function dns.socket_wrapper_set(...) -- - - - - - - - - socket_wrapper_set |
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
992 | return _resolver:socket_wrapper_set(...); |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
993 | end |
337 | 994 | |
2070
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
995 | return dns; |