Software / code / prosody
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net/dns.lua @ 6863:88d54bec26b7
net.dns: Unconditionally cache records found in answers
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Mon, 25 May 2015 23:16:11 +0100 |
| parent | 6645:4f934cf03bc9 |
| child | 6866:abff7543b79c |
| child | 7054:94d5e2f33a10 |
| rev | line source |
|---|---|
|
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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 | |
| 6 -- todo: quick (default) header generation | |
| 7 -- todo: nxdomain, error handling | |
| 8 -- todo: cache results of encodeName | |
| 9 | |
| 10 | |
| 11 -- reference: http://tools.ietf.org/html/rfc1035 | |
| 12 -- reference: http://tools.ietf.org/html/rfc1876 (LOC) | |
| 13 | |
| 14 | |
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15 local socket = require "socket"; |
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net.dns: Handle our own timeouts, including falling onto other servers in resolv.conf if necessary
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16 local timer = require "util.timer"; |
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17 |
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net.dns: Updated to use util.windows.get_nameservers for enumerating nameservers on Windows.
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18 local _, windows = pcall(require, "util.windows"); |
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19 local is_windows = (_ and windows) or os.getenv("WINDIR"); |
| 337 | 20 |
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21 local coroutine, io, math, string, table = |
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22 coroutine, io, math, string, table; |
| 337 | 23 |
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net.dns: Clean up tostring() of returned records, as a result PTR records can now be tostring()'d
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24 local ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack, select, type= |
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25 ipairs, next, pairs, print, setmetatable, tostring, assert, error, unpack, select, type; |
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net.dns: Removed dependency on util.ztact by moving ztact.get/set in.
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26 |
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27 local ztact = { -- public domain 20080404 lua@ztact.com |
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28 get = function(parent, ...) |
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29 local len = select('#', ...); |
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30 for i=1,len do |
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31 parent = parent[select(i, ...)]; |
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32 if parent == nil then break; end |
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33 end |
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34 return parent; |
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35 end; |
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36 set = function(parent, ...) |
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37 local len = select('#', ...); |
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38 local key, value = select(len-1, ...); |
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39 local cutpoint, cutkey; |
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40 |
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41 for i=1,len-2 do |
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42 local key = select (i, ...) |
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43 local child = parent[key] |
| 337 | 44 |
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45 if value == nil then |
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46 if child == nil then |
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47 return; |
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48 elseif next(child, next(child)) then |
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49 cutpoint = nil; cutkey = nil; |
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50 elseif cutpoint == nil then |
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51 cutpoint = parent; cutkey = key; |
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52 end |
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53 elseif child == nil then |
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54 child = {}; |
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55 parent[key] = child; |
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56 end |
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57 parent = child |
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58 end |
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59 |
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60 if value == nil and cutpoint then |
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61 cutpoint[cutkey] = nil; |
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62 else |
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63 parent[key] = value; |
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64 return value; |
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65 end |
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66 end; |
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67 }; |
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68 local get, set = ztact.get, ztact.set; |
| 337 | 69 |
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70 local default_timeout = 15; |
| 337 | 71 |
| 72 -------------------------------------------------- module dns | |
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73 module('dns') |
| 337 | 74 local dns = _M; |
| 75 | |
| 76 | |
| 77 -- dns type & class codes ------------------------------ dns type & class codes | |
| 78 | |
| 79 | |
| 80 local append = table.insert | |
| 81 | |
| 82 | |
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83 local function highbyte(i) -- - - - - - - - - - - - - - - - - - - highbyte |
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84 return (i-(i%0x100))/0x100; |
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85 end |
| 337 | 86 |
| 87 | |
| 88 local function augment (t) -- - - - - - - - - - - - - - - - - - - - augment | |
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89 local a = {}; |
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90 for i,s in pairs(t) do |
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91 a[i] = s; |
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92 a[s] = s; |
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93 a[string.lower(s)] = s; |
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94 end |
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95 return a; |
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96 end |
| 337 | 97 |
| 98 | |
| 99 local function encode (t) -- - - - - - - - - - - - - - - - - - - - - encode | |
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100 local code = {}; |
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101 for i,s in pairs(t) do |
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102 local word = string.char(highbyte(i), i%0x100); |
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103 code[i] = word; |
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104 code[s] = word; |
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105 code[string.lower(s)] = word; |
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106 end |
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107 return code; |
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108 end |
| 337 | 109 |
| 110 | |
| 111 dns.types = { | |
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112 'A', 'NS', 'MD', 'MF', 'CNAME', 'SOA', 'MB', 'MG', 'MR', 'NULL', 'WKS', |
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113 'PTR', 'HINFO', 'MINFO', 'MX', 'TXT', |
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114 [ 28] = 'AAAA', [ 29] = 'LOC', [ 33] = 'SRV', |
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115 [252] = 'AXFR', [253] = 'MAILB', [254] = 'MAILA', [255] = '*' }; |
| 337 | 116 |
| 117 | |
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118 dns.classes = { 'IN', 'CS', 'CH', 'HS', [255] = '*' }; |
| 337 | 119 |
| 120 | |
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121 dns.type = augment (dns.types); |
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122 dns.class = augment (dns.classes); |
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123 dns.typecode = encode (dns.types); |
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124 dns.classcode = encode (dns.classes); |
| 337 | 125 |
| 126 | |
| 127 | |
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128 local function standardize(qname, qtype, qclass) -- - - - - - - standardize |
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129 if string.byte(qname, -1) ~= 0x2E then qname = qname..'.'; end |
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130 qname = string.lower(qname); |
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131 return qname, dns.type[qtype or 'A'], dns.class[qclass or 'IN']; |
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132 end |
| 337 | 133 |
| 134 | |
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135 local function prune(rrs, time, soft) -- - - - - - - - - - - - - - - prune |
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136 time = time or socket.gettime(); |
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137 for i,rr in ipairs(rrs) do |
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138 if rr.tod then |
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139 -- rr.tod = rr.tod - 50 -- accelerated decripitude |
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140 rr.ttl = math.floor(rr.tod - time); |
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141 if rr.ttl <= 0 then |
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142 rrs[rr[rr.type:lower()]] = nil; |
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143 table.remove(rrs, i); |
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144 return prune(rrs, time, soft); -- Re-iterate |
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145 end |
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146 elseif soft == 'soft' then -- What is this? I forget! |
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147 assert(rr.ttl == 0); |
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148 rrs[rr[rr.type:lower()]] = nil; |
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149 table.remove(rrs, i); |
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150 end |
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151 end |
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152 end |
| 337 | 153 |
| 154 | |
| 155 -- metatables & co. ------------------------------------------ metatables & co. | |
| 156 | |
| 157 | |
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158 local resolver = {}; |
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159 resolver.__index = resolver; |
| 337 | 160 |
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161 resolver.timeout = default_timeout; |
| 337 | 162 |
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163 local function default_rr_tostring(rr) |
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164 local rr_val = rr.type and rr[rr.type:lower()]; |
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165 if type(rr_val) ~= "string" then |
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166 return "<UNKNOWN RDATA TYPE>"; |
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167 end |
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168 return rr_val; |
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169 end |
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170 |
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171 local special_tostrings = { |
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172 LOC = resolver.LOC_tostring; |
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173 MX = function (rr) |
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174 return string.format('%2i %s', rr.pref, rr.mx); |
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175 end; |
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176 SRV = function (rr) |
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177 local s = rr.srv; |
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178 return string.format('%5d %5d %5d %s', s.priority, s.weight, s.port, s.target); |
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179 end; |
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180 }; |
| 337 | 181 |
|
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182 local rr_metatable = {}; -- - - - - - - - - - - - - - - - - - - rr_metatable |
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183 function rr_metatable.__tostring(rr) |
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184 local rr_string = (special_tostrings[rr.type] or default_rr_tostring)(rr); |
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185 return string.format('%2s %-5s %6i %-28s %s', rr.class, rr.type, rr.ttl, rr.name, rr_string); |
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186 end |
| 337 | 187 |
| 188 | |
|
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189 local rrs_metatable = {}; -- - - - - - - - - - - - - - - - - - rrs_metatable |
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190 function rrs_metatable.__tostring(rrs) |
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191 local t = {}; |
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192 for i,rr in ipairs(rrs) do |
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193 append(t, tostring(rr)..'\n'); |
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194 end |
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195 return table.concat(t); |
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196 end |
| 337 | 197 |
| 198 | |
|
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199 local cache_metatable = {}; -- - - - - - - - - - - - - - - - cache_metatable |
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200 function cache_metatable.__tostring(cache) |
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201 local time = socket.gettime(); |
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202 local t = {}; |
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203 for class,types in pairs(cache) do |
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204 for type,names in pairs(types) do |
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205 for name,rrs in pairs(names) do |
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206 prune(rrs, time); |
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207 append(t, tostring(rrs)); |
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208 end |
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209 end |
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210 end |
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211 return table.concat(t); |
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212 end |
| 337 | 213 |
| 214 | |
|
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215 function resolver:new() -- - - - - - - - - - - - - - - - - - - - - resolver |
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216 local r = { active = {}, cache = {}, unsorted = {} }; |
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217 setmetatable(r, resolver); |
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218 setmetatable(r.cache, cache_metatable); |
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219 setmetatable(r.unsorted, { __mode = 'kv' }); |
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220 return r; |
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221 end |
| 337 | 222 |
| 223 | |
| 224 -- packet layer -------------------------------------------------- packet layer | |
| 225 | |
| 226 | |
|
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227 function dns.random(...) -- - - - - - - - - - - - - - - - - - - dns.random |
|
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Kim Alvefur <zash@zash.se>
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228 math.randomseed(math.floor(10000*socket.gettime()) % 0x80000000); |
|
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229 dns.random = math.random; |
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230 return dns.random(...); |
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231 end |
| 337 | 232 |
| 233 | |
|
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234 local function encodeHeader(o) -- - - - - - - - - - - - - - - encodeHeader |
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235 o = o or {}; |
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236 o.id = o.id or dns.random(0, 0xffff); -- 16b (random) id |
| 337 | 237 |
|
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238 o.rd = o.rd or 1; -- 1b 1 recursion desired |
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239 o.tc = o.tc or 0; -- 1b 1 truncated response |
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240 o.aa = o.aa or 0; -- 1b 1 authoritative response |
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241 o.opcode = o.opcode or 0; -- 4b 0 query |
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242 -- 1 inverse query |
| 337 | 243 -- 2 server status request |
| 244 -- 3-15 reserved | |
|
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245 o.qr = o.qr or 0; -- 1b 0 query, 1 response |
| 337 | 246 |
|
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247 o.rcode = o.rcode or 0; -- 4b 0 no error |
| 337 | 248 -- 1 format error |
| 249 -- 2 server failure | |
| 250 -- 3 name error | |
| 251 -- 4 not implemented | |
| 252 -- 5 refused | |
| 253 -- 6-15 reserved | |
|
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254 o.z = o.z or 0; -- 3b 0 resvered |
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255 o.ra = o.ra or 0; -- 1b 1 recursion available |
| 337 | 256 |
|
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257 o.qdcount = o.qdcount or 1; -- 16b number of question RRs |
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258 o.ancount = o.ancount or 0; -- 16b number of answers RRs |
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259 o.nscount = o.nscount or 0; -- 16b number of nameservers RRs |
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260 o.arcount = o.arcount or 0; -- 16b number of additional RRs |
| 337 | 261 |
|
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262 -- string.char() rounds, so prevent roundup with -0.4999 |
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263 local header = string.char( |
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264 highbyte(o.id), o.id %0x100, |
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265 o.rd + 2*o.tc + 4*o.aa + 8*o.opcode + 128*o.qr, |
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266 o.rcode + 16*o.z + 128*o.ra, |
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267 highbyte(o.qdcount), o.qdcount %0x100, |
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268 highbyte(o.ancount), o.ancount %0x100, |
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269 highbyte(o.nscount), o.nscount %0x100, |
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270 highbyte(o.arcount), o.arcount %0x100 |
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271 ); |
| 337 | 272 |
|
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273 return header, o.id; |
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274 end |
| 337 | 275 |
| 276 | |
|
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277 local function encodeName(name) -- - - - - - - - - - - - - - - - encodeName |
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278 local t = {}; |
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279 for part in string.gmatch(name, '[^.]+') do |
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280 append(t, string.char(string.len(part))); |
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281 append(t, part); |
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282 end |
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283 append(t, string.char(0)); |
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284 return table.concat(t); |
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285 end |
| 337 | 286 |
| 287 | |
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288 local function encodeQuestion(qname, qtype, qclass) -- - - - encodeQuestion |
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289 qname = encodeName(qname); |
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290 qtype = dns.typecode[qtype or 'a']; |
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291 qclass = dns.classcode[qclass or 'in']; |
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292 return qname..qtype..qclass; |
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293 end |
| 337 | 294 |
| 295 | |
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296 function resolver:byte(len) -- - - - - - - - - - - - - - - - - - - - - byte |
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297 len = len or 1; |
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298 local offset = self.offset; |
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299 local last = offset + len - 1; |
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300 if last > #self.packet then |
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301 error(string.format('out of bounds: %i>%i', last, #self.packet)); |
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302 end |
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303 self.offset = offset + len; |
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304 return string.byte(self.packet, offset, last); |
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305 end |
| 337 | 306 |
| 307 | |
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308 function resolver:word() -- - - - - - - - - - - - - - - - - - - - - - word |
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309 local b1, b2 = self:byte(2); |
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310 return 0x100*b1 + b2; |
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311 end |
| 337 | 312 |
| 313 | |
| 314 function resolver:dword () -- - - - - - - - - - - - - - - - - - - - - dword | |
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315 local b1, b2, b3, b4 = self:byte(4); |
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316 --print('dword', b1, b2, b3, b4); |
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317 return 0x1000000*b1 + 0x10000*b2 + 0x100*b3 + b4; |
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318 end |
| 337 | 319 |
| 320 | |
|
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321 function resolver:sub(len) -- - - - - - - - - - - - - - - - - - - - - - sub |
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322 len = len or 1; |
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323 local s = string.sub(self.packet, self.offset, self.offset + len - 1); |
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324 self.offset = self.offset + len; |
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325 return s; |
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326 end |
| 337 | 327 |
| 328 | |
|
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329 function resolver:header(force) -- - - - - - - - - - - - - - - - - - header |
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330 local id = self:word(); |
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331 --print(string.format(':header id %x', id)); |
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332 if not self.active[id] and not force then return nil; end |
| 337 | 333 |
|
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334 local h = { id = id }; |
| 337 | 335 |
|
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336 local b1, b2 = self:byte(2); |
| 337 | 337 |
|
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338 h.rd = b1 %2; |
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339 h.tc = b1 /2%2; |
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340 h.aa = b1 /4%2; |
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341 h.opcode = b1 /8%16; |
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342 h.qr = b1 /128; |
| 337 | 343 |
|
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344 h.rcode = b2 %16; |
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345 h.z = b2 /16%8; |
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346 h.ra = b2 /128; |
| 337 | 347 |
|
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348 h.qdcount = self:word(); |
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349 h.ancount = self:word(); |
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350 h.nscount = self:word(); |
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351 h.arcount = self:word(); |
| 337 | 352 |
|
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353 for k,v in pairs(h) do h[k] = v-v%1; end |
| 337 | 354 |
|
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355 return h; |
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356 end |
| 337 | 357 |
| 358 | |
|
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359 function resolver:name() -- - - - - - - - - - - - - - - - - - - - - - name |
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360 local remember, pointers = nil, 0; |
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361 local len = self:byte(); |
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362 local n = {}; |
|
4422
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s2smanager, net.dns: Fix handling for NXNAME and SRV target of "."
Florian Zeitz <florob@babelmonkeys.de>
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|
363 if len == 0 then return "." end -- Root label |
|
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364 while len > 0 do |
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365 if len >= 0xc0 then -- name is "compressed" |
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366 pointers = pointers + 1; |
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367 if pointers >= 20 then error('dns error: 20 pointers'); end; |
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368 local offset = ((len-0xc0)*0x100) + self:byte(); |
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369 remember = remember or self.offset; |
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370 self.offset = offset + 1; -- +1 for lua |
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371 else -- name is not compressed |
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372 append(n, self:sub(len)..'.'); |
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|
373 end |
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374 len = self:byte(); |
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375 end |
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376 self.offset = remember or self.offset; |
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377 return table.concat(n); |
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378 end |
| 337 | 379 |
| 380 | |
|
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381 function resolver:question() -- - - - - - - - - - - - - - - - - - question |
|
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382 local q = {}; |
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383 q.name = self:name(); |
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384 q.type = dns.type[self:word()]; |
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385 q.class = dns.class[self:word()]; |
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386 return q; |
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387 end |
| 337 | 388 |
| 389 | |
|
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390 function resolver:A(rr) -- - - - - - - - - - - - - - - - - - - - - - - - A |
|
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391 local b1, b2, b3, b4 = self:byte(4); |
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392 rr.a = string.format('%i.%i.%i.%i', b1, b2, b3, b4); |
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393 end |
| 337 | 394 |
|
4267
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|
395 function resolver:AAAA(rr) |
|
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396 local addr = {}; |
|
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|
397 for i = 1, rr.rdlength, 2 do |
|
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|
398 local b1, b2 = self:byte(2); |
|
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|
399 table.insert(addr, ("%02x%02x"):format(b1, b2)); |
|
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|
400 end |
| 4373 | 401 addr = table.concat(addr, ":"):gsub("%f[%x]0+(%x)","%1"); |
| 402 local zeros = {}; | |
| 403 for item in addr:gmatch(":[0:]+:") do | |
| 404 table.insert(zeros, item) | |
| 405 end | |
| 406 if #zeros == 0 then | |
| 407 rr.aaaa = addr; | |
| 408 return | |
| 409 elseif #zeros > 1 then | |
| 410 table.sort(zeros, function(a, b) return #a > #b end); | |
| 411 end | |
| 412 rr.aaaa = addr:gsub(zeros[1], "::", 1):gsub("^0::", "::"):gsub("::0$", "::"); | |
|
4267
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|
413 end |
| 337 | 414 |
|
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|
415 function resolver:CNAME(rr) -- - - - - - - - - - - - - - - - - - - - CNAME |
|
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416 rr.cname = self:name(); |
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417 end |
| 337 | 418 |
| 419 | |
|
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420 function resolver:MX(rr) -- - - - - - - - - - - - - - - - - - - - - - - MX |
|
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421 rr.pref = self:word(); |
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422 rr.mx = self:name(); |
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423 end |
| 337 | 424 |
| 425 | |
|
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426 function resolver:LOC_nibble_power() -- - - - - - - - - - LOC_nibble_power |
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427 local b = self:byte(); |
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428 --print('nibbles', ((b-(b%0x10))/0x10), (b%0x10)); |
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429 return ((b-(b%0x10))/0x10) * (10^(b%0x10)); |
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430 end |
| 337 | 431 |
| 432 | |
|
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433 function resolver:LOC(rr) -- - - - - - - - - - - - - - - - - - - - - - LOC |
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434 rr.version = self:byte(); |
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435 if rr.version == 0 then |
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436 rr.loc = rr.loc or {}; |
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437 rr.loc.size = self:LOC_nibble_power(); |
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438 rr.loc.horiz_pre = self:LOC_nibble_power(); |
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439 rr.loc.vert_pre = self:LOC_nibble_power(); |
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440 rr.loc.latitude = self:dword(); |
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441 rr.loc.longitude = self:dword(); |
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442 rr.loc.altitude = self:dword(); |
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443 end |
|
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444 end |
| 337 | 445 |
| 446 | |
|
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447 local function LOC_tostring_degrees(f, pos, neg) -- - - - - - - - - - - - - |
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448 f = f - 0x80000000; |
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449 if f < 0 then pos = neg; f = -f; end |
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450 local deg, min, msec; |
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451 msec = f%60000; |
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452 f = (f-msec)/60000; |
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453 min = f%60; |
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454 deg = (f-min)/60; |
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455 return string.format('%3d %2d %2.3f %s', deg, min, msec/1000, pos); |
|
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456 end |
| 337 | 457 |
| 458 | |
|
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|
459 function resolver.LOC_tostring(rr) -- - - - - - - - - - - - - LOC_tostring |
|
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460 local t = {}; |
| 337 | 461 |
|
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462 --[[ |
|
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463 for k,name in pairs { 'size', 'horiz_pre', 'vert_pre', 'latitude', 'longitude', 'altitude' } do |
|
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464 append(t, string.format('%4s%-10s: %12.0f\n', '', name, rr.loc[name])); |
|
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465 end |
|
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466 --]] |
| 337 | 467 |
|
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|
468 append(t, string.format( |
|
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469 '%s %s %.2fm %.2fm %.2fm %.2fm', |
|
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|
470 LOC_tostring_degrees (rr.loc.latitude, 'N', 'S'), |
|
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|
471 LOC_tostring_degrees (rr.loc.longitude, 'E', 'W'), |
|
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472 (rr.loc.altitude - 10000000) / 100, |
|
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|
473 rr.loc.size / 100, |
|
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|
474 rr.loc.horiz_pre / 100, |
|
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|
475 rr.loc.vert_pre / 100 |
|
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|
476 )); |
| 337 | 477 |
|
2069
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|
478 return table.concat(t); |
|
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|
479 end |
| 337 | 480 |
| 481 | |
|
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|
482 function resolver:NS(rr) -- - - - - - - - - - - - - - - - - - - - - - - NS |
|
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|
483 rr.ns = self:name(); |
|
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|
484 end |
| 337 | 485 |
| 486 | |
|
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|
487 function resolver:SOA(rr) -- - - - - - - - - - - - - - - - - - - - - - SOA |
|
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488 end |
| 337 | 489 |
| 490 | |
|
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|
491 function resolver:SRV(rr) -- - - - - - - - - - - - - - - - - - - - - - SRV |
|
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|
492 rr.srv = {}; |
|
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|
493 rr.srv.priority = self:word(); |
|
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494 rr.srv.weight = self:word(); |
|
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|
495 rr.srv.port = self:word(); |
|
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|
496 rr.srv.target = self:name(); |
|
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|
497 end |
| 337 | 498 |
|
3513
4cf5962747fc
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Matthew Wild <mwild1@gmail.com>
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3512
diff
changeset
|
499 function resolver:PTR(rr) |
|
4cf5962747fc
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Matthew Wild <mwild1@gmail.com>
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|
500 rr.ptr = self:name(); |
|
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|
501 end |
| 337 | 502 |
|
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|
503 function resolver:TXT(rr) -- - - - - - - - - - - - - - - - - - - - - - TXT |
| 4251 | 504 rr.txt = self:sub (self:byte()); |
|
2069
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|
505 end |
| 337 | 506 |
| 507 | |
|
2069
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|
508 function resolver:rr() -- - - - - - - - - - - - - - - - - - - - - - - - rr |
|
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|
509 local rr = {}; |
|
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|
510 setmetatable(rr, rr_metatable); |
|
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|
511 rr.name = self:name(self); |
|
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|
512 rr.type = dns.type[self:word()] or rr.type; |
|
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|
513 rr.class = dns.class[self:word()] or rr.class; |
|
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|
514 rr.ttl = 0x10000*self:word() + self:word(); |
|
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|
515 rr.rdlength = self:word(); |
| 337 | 516 |
|
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|
517 if rr.ttl <= 0 then |
|
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|
518 rr.tod = self.time + 30; |
|
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|
519 else |
|
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|
520 rr.tod = self.time + rr.ttl; |
|
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|
521 end |
| 337 | 522 |
|
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|
523 local remember = self.offset; |
|
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|
524 local rr_parser = self[dns.type[rr.type]]; |
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|
525 if rr_parser then rr_parser(self, rr); end |
|
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|
526 self.offset = remember; |
|
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|
527 rr.rdata = self:sub(rr.rdlength); |
|
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|
528 return rr; |
|
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529 end |
| 337 | 530 |
| 531 | |
| 532 function resolver:rrs (count) -- - - - - - - - - - - - - - - - - - - - - rrs | |
|
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|
533 local rrs = {}; |
|
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|
534 for i = 1,count do append(rrs, self:rr()); end |
|
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|
535 return rrs; |
|
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|
536 end |
| 337 | 537 |
| 538 | |
|
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changeset
|
539 function resolver:decode(packet, force) -- - - - - - - - - - - - - - decode |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
540 self.packet, self.offset = packet, 1; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
541 local header = self:header(force); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
542 if not header then return nil; end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
543 local response = { header = header }; |
| 337 | 544 |
|
2069
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
545 response.question = {}; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
546 local offset = self.offset; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
547 for i = 1,response.header.qdcount do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
548 append(response.question, self:question()); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
549 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
550 response.question.raw = string.sub(self.packet, offset, self.offset - 1); |
| 337 | 551 |
|
2069
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
552 if not force then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
553 if not self.active[response.header.id] or not self.active[response.header.id][response.question.raw] then |
|
5266
5c3a3ef6b769
net.dns: Clean up query list when a server is marked down
Matthew Wild <mwild1@gmail.com>
parents:
4422
diff
changeset
|
554 self.active[response.header.id] = nil; |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
555 return nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
556 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
557 end |
| 337 | 558 |
|
2069
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
559 response.answer = self:rrs(response.header.ancount); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
560 response.authority = self:rrs(response.header.nscount); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
561 response.additional = self:rrs(response.header.arcount); |
| 337 | 562 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
563 return response; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
564 end |
| 337 | 565 |
| 566 | |
| 567 -- socket layer -------------------------------------------------- socket layer | |
| 568 | |
| 569 | |
|
2069
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
570 resolver.delays = { 1, 3 }; |
| 337 | 571 |
| 572 | |
|
2069
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net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
573 function resolver:addnameserver(address) -- - - - - - - - - - addnameserver |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
574 self.server = self.server or {}; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
575 append(self.server, address); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
576 end |
| 337 | 577 |
| 578 | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
579 function resolver:setnameserver(address) -- - - - - - - - - - setnameserver |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
580 self.server = {}; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
581 self:addnameserver(address); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
582 end |
| 337 | 583 |
| 584 | |
|
2069
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
585 function resolver:adddefaultnameservers() -- - - - - adddefaultnameservers |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
586 if is_windows then |
|
3544
f2aca3e0fe3b
net.dns: Fixed a traceback when util/windows.dll is unavailable on windows.
Waqas Hussain <waqas20@gmail.com>
parents:
3540
diff
changeset
|
587 if windows and windows.get_nameservers then |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
588 for _, server in ipairs(windows.get_nameservers()) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
589 self:addnameserver(server); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
590 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
591 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
592 if not self.server or #self.server == 0 then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
593 -- TODO log warning about no nameservers, adding opendns servers as fallback |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
594 self:addnameserver("208.67.222.222"); |
|
2742
6c0a081cd766
net.dns: Trailing whitespace
Matthew Wild <mwild1@gmail.com>
parents:
2741
diff
changeset
|
595 self:addnameserver("208.67.220.220"); |
|
2069
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
596 end |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
597 else -- posix |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
598 local resolv_conf = io.open("/etc/resolv.conf"); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
599 if resolv_conf then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
600 for line in resolv_conf:lines() do |
|
2741
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
|
601 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
|
602 :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:
2620
diff
changeset
|
603 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
|
604 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
|
605 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
|
606 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
|
607 end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
608 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
609 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
610 if not self.server or #self.server == 0 then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
611 -- TODO log warning about no nameservers, adding localhost as the default nameserver |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
612 self:addnameserver("127.0.0.1"); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
613 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
614 end |
|
399
93b6587d9afb
Added temporary fix for srv on windows: using opendns nameservers
Waqas Hussain <waqas20@gmail.com>
parents:
379
diff
changeset
|
615 end |
| 337 | 616 |
| 617 | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
618 function resolver:getsocket(servernum) -- - - - - - - - - - - - - getsocket |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
619 self.socket = self.socket or {}; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
620 self.socketset = self.socketset or {}; |
| 337 | 621 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
622 local sock = self.socket[servernum]; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
623 if sock then return sock; end |
| 337 | 624 |
|
6509
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
625 local ok, err; |
|
3954
6e22b0cf3d72
net.dns: resolver:getsocket(): Return nil, err on failure
Matthew Wild <mwild1@gmail.com>
parents:
3747
diff
changeset
|
626 sock, err = socket.udp(); |
|
5730
411e9e7d8035
net.dns, net.adns: Make sure errors from net.server are propagated (thanks asterix)
Kim Alvefur <zash@zash.se>
parents:
5566
diff
changeset
|
627 if sock and self.socket_wrapper then sock, err = self.socket_wrapper(sock, self); end |
|
3954
6e22b0cf3d72
net.dns: resolver:getsocket(): Return nil, err on failure
Matthew Wild <mwild1@gmail.com>
parents:
3747
diff
changeset
|
628 if not sock then |
|
6e22b0cf3d72
net.dns: resolver:getsocket(): Return nil, err on failure
Matthew Wild <mwild1@gmail.com>
parents:
3747
diff
changeset
|
629 return nil, err; |
|
6e22b0cf3d72
net.dns: resolver:getsocket(): Return nil, err on failure
Matthew Wild <mwild1@gmail.com>
parents:
3747
diff
changeset
|
630 end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
631 sock:settimeout(0); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
632 -- todo: attempt to use a random port, fallback to 0 |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
633 self.socket[servernum] = sock; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
634 self.socketset[sock] = servernum; |
|
6509
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
635 -- set{sock,peer}name can fail, eg because of local routing table |
|
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
636 -- if so, try the next server |
|
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
637 ok, err = sock:setsockname('*', 0); |
|
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
638 if not ok then return self:servfail(sock, err); end |
|
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
639 ok, err = sock:setpeername(self.server[servernum], 53); |
|
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
640 if not ok then return self:servfail(sock, err); end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
641 return sock; |
|
1786
4016d8bc30b8
net.dns: Multiple internal changes and API extensions to allow for more reliable DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
1523
diff
changeset
|
642 end |
| 337 | 643 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
644 function resolver:voidsocket(sock) |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
645 if self.socket[sock] then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
646 self.socketset[self.socket[sock]] = nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
647 self.socket[sock] = nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
648 elseif self.socketset[sock] then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
649 self.socket[self.socketset[sock]] = nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
650 self.socketset[sock] = nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
651 end |
|
5267
a2080e5c4eda
net.dns: Close voided sockets, so they don't stay in net.server
Kim Alvefur <zash@zash.se>
parents:
5266
diff
changeset
|
652 sock:close(); |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
653 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
654 |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
655 function resolver:socket_wrapper_set(func) -- - - - - - - socket_wrapper_set |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
656 self.socket_wrapper = func; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
657 end |
| 337 | 658 |
| 659 | |
| 660 function resolver:closeall () -- - - - - - - - - - - - - - - - - - closeall | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
661 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
|
662 self.socket[i] = nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
663 self.socketset[sock] = nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
664 sock:close(); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
665 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
666 end |
| 337 | 667 |
| 668 | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
669 function resolver:remember(rr, type) -- - - - - - - - - - - - - - remember |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
670 --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
|
671 local qname, qtype, qclass = standardize(rr.name, rr.type, rr.class); |
| 337 | 672 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
673 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
|
674 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
|
675 local all = get(self.cache, qclass, '*', qname); |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
676 --print('remember all', all); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
677 if all then append(all, rr); end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
678 end |
| 337 | 679 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
680 self.cache = self.cache or setmetatable({}, cache_metatable); |
|
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
|
681 local rrs = get(self.cache, qclass, type, qname) or |
|
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
|
682 set(self.cache, qclass, type, qname, setmetatable({}, rrs_metatable)); |
|
6463
460584257cc9
net.dns: Avoid duplicate cache entries
Florian Zeitz <florob@babelmonkeys.de>
parents:
6310
diff
changeset
|
683 if not rrs[rr[qtype:lower()]] then |
|
460584257cc9
net.dns: Avoid duplicate cache entries
Florian Zeitz <florob@babelmonkeys.de>
parents:
6310
diff
changeset
|
684 rrs[rr[qtype:lower()]] = true; |
|
460584257cc9
net.dns: Avoid duplicate cache entries
Florian Zeitz <florob@babelmonkeys.de>
parents:
6310
diff
changeset
|
685 append(rrs, rr); |
|
460584257cc9
net.dns: Avoid duplicate cache entries
Florian Zeitz <florob@babelmonkeys.de>
parents:
6310
diff
changeset
|
686 end |
| 337 | 687 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
688 if type == 'MX' then self.unsorted[rrs] = true; end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
689 end |
| 337 | 690 |
| 691 | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
692 local function comp_mx(a, b) -- - - - - - - - - - - - - - - - - - - comp_mx |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
693 return (a.pref == b.pref) and (a.mx < b.mx) or (a.pref < b.pref); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
694 end |
| 337 | 695 |
| 696 | |
|
6631
45222bfb206f
net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s
Kim Alvefur <zash@zash.se>
parents:
6509
diff
changeset
|
697 function resolver:peek (qname, qtype, qclass, n) -- - - - - - - - - - - - peek |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
698 qname, qtype, qclass = standardize(qname, qtype, qclass); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
699 local rrs = get(self.cache, qclass, qtype, qname); |
|
6631
45222bfb206f
net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s
Kim Alvefur <zash@zash.se>
parents:
6509
diff
changeset
|
700 if not rrs then |
|
45222bfb206f
net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s
Kim Alvefur <zash@zash.se>
parents:
6509
diff
changeset
|
701 if n then if n <= 0 then return end else n = 3 end |
|
45222bfb206f
net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s
Kim Alvefur <zash@zash.se>
parents:
6509
diff
changeset
|
702 rrs = get(self.cache, qclass, "CNAME", qname); |
|
45222bfb206f
net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s
Kim Alvefur <zash@zash.se>
parents:
6509
diff
changeset
|
703 if not (rrs and rrs[1]) then return end |
|
45222bfb206f
net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s
Kim Alvefur <zash@zash.se>
parents:
6509
diff
changeset
|
704 return self:peek(rrs[1].cname, qtype, qclass, n - 1); |
|
45222bfb206f
net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s
Kim Alvefur <zash@zash.se>
parents:
6509
diff
changeset
|
705 end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
706 if prune(rrs, socket.gettime()) and qtype == '*' or not next(rrs) then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
707 set(self.cache, qclass, qtype, qname, nil); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
708 return nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
709 end |
|
6631
45222bfb206f
net.dns, mod_s2s: Add chasing of CNAMEs to net.dns and remove it from mod_s2s
Kim Alvefur <zash@zash.se>
parents:
6509
diff
changeset
|
710 if self.unsorted[rrs] then table.sort (rrs, comp_mx); self.unsorted[rrs] = nil; end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
711 return rrs; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
712 end |
| 337 | 713 |
| 714 | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
715 function resolver:purge(soft) -- - - - - - - - - - - - - - - - - - - purge |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
716 if soft == 'soft' then |
|
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 class,types in pairs(self.cache or {}) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
719 for type,names in pairs(types) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
720 for name,rrs in pairs(names) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
721 prune(rrs, self.time, 'soft') |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
722 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
723 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
724 end |
|
4400
ac651265766c
net.dns: Preserve metatable on manual cache purge
Matthew Wild <mwild1@gmail.com>
parents:
4373
diff
changeset
|
725 else self.cache = setmetatable({}, cache_metatable); end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
726 end |
| 337 | 727 |
| 728 | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
729 function resolver:query(qname, qtype, qclass) -- - - - - - - - - - -- query |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
730 qname, qtype, qclass = standardize(qname, qtype, qclass) |
| 337 | 731 |
|
6288
d122420542fb
net.dns: Fix duplicated cache insertions by limiting outstanding queries per name to one
Kim Alvefur <zash@zash.se>
parents:
5730
diff
changeset
|
732 local co = coroutine.running(); |
|
d122420542fb
net.dns: Fix duplicated cache insertions by limiting outstanding queries per name to one
Kim Alvefur <zash@zash.se>
parents:
5730
diff
changeset
|
733 local q = get(self.wanted, qclass, qtype, qname); |
|
d122420542fb
net.dns: Fix duplicated cache insertions by limiting outstanding queries per name to one
Kim Alvefur <zash@zash.se>
parents:
5730
diff
changeset
|
734 if co and q then |
|
d122420542fb
net.dns: Fix duplicated cache insertions by limiting outstanding queries per name to one
Kim Alvefur <zash@zash.se>
parents:
5730
diff
changeset
|
735 -- We are already waiting for a reply to an identical query. |
|
d122420542fb
net.dns: Fix duplicated cache insertions by limiting outstanding queries per name to one
Kim Alvefur <zash@zash.se>
parents:
5730
diff
changeset
|
736 set(self.wanted, qclass, qtype, qname, co, true); |
|
d122420542fb
net.dns: Fix duplicated cache insertions by limiting outstanding queries per name to one
Kim Alvefur <zash@zash.se>
parents:
5730
diff
changeset
|
737 return true; |
|
d122420542fb
net.dns: Fix duplicated cache insertions by limiting outstanding queries per name to one
Kim Alvefur <zash@zash.se>
parents:
5730
diff
changeset
|
738 end |
|
d122420542fb
net.dns: Fix duplicated cache insertions by limiting outstanding queries per name to one
Kim Alvefur <zash@zash.se>
parents:
5730
diff
changeset
|
739 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
740 if not self.server then self:adddefaultnameservers(); end |
| 337 | 741 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
742 local question = encodeQuestion(qname, qtype, qclass); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
743 local peek = self:peek (qname, qtype, qclass); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
744 if peek then return peek; end |
| 337 | 745 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
746 local header, id = encodeHeader(); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
747 --print ('query id', id, qclass, qtype, qname) |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
748 local o = { |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
749 packet = header..question, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
750 server = self.best_server, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
751 delay = 1, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
752 retry = socket.gettime() + self.delays[1] |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
753 }; |
| 337 | 754 |
|
3540
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
755 -- remember the query |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
756 self.active[id] = self.active[id] or {}; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
757 self.active[id][question] = o; |
| 337 | 758 |
|
3540
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
759 -- remember which coroutine wants the answer |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
760 if co then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
761 set(self.wanted, qclass, qtype, qname, co, true); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
762 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
|
763 |
|
3955
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
764 local conn, err = self:getsocket(o.server) |
|
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
765 if not conn then |
|
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
766 return nil, err; |
|
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
767 end |
|
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
|
768 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
|
769 |
|
3327
b447682f2a8d
net.dns: Make timeout configurable (default 15s)
Matthew Wild <mwild1@gmail.com>
parents:
3326
diff
changeset
|
770 if timer and self.timeout then |
|
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
|
771 local num_servers = #self.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
|
772 local i = 1; |
|
3327
b447682f2a8d
net.dns: Make timeout configurable (default 15s)
Matthew Wild <mwild1@gmail.com>
parents:
3326
diff
changeset
|
773 timer.add_task(self.timeout, function () |
|
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
|
774 if get(self.wanted, qclass, qtype, qname, co) then |
|
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
|
775 if i < num_servers then |
|
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
|
776 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
|
777 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
|
778 o.server = self.best_server; |
|
3955
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
779 conn, err = self:getsocket(o.server); |
|
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
780 if conn then |
|
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
781 conn:send(o.packet); |
|
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
782 return self.timeout; |
|
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
783 end |
|
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
|
784 end |
|
3955
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
785 -- Tried everything, failed |
|
6309
b6f76a52eb36
net.dns: Ensure all pending requests get notified of a timeout when looking up a record (fix for d122420542fb)
Matthew Wild <mwild1@gmail.com>
parents:
6288
diff
changeset
|
786 self:cancel(qclass, qtype, qname); |
|
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
|
787 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
|
788 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
|
789 end |
|
3955
a096700d23d9
net.dns: resolver:query(): Handle getsocket() failures, and return true on success
Matthew Wild <mwild1@gmail.com>
parents:
3954
diff
changeset
|
790 return true; |
|
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
791 end |
|
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
792 |
|
6509
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
793 function resolver:servfail(sock, err) |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
794 -- Resend all queries for this server |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
795 |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
796 local num = self.socketset[sock] |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
797 |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
798 -- Socket is dead now |
|
6508
4a28b8320d7f
net.dns: Return new socket from servfail
Kim Alvefur <zash@zash.se>
parents:
6463
diff
changeset
|
799 sock = self:voidsocket(sock); |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
800 |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
801 -- 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
|
802 self.time = socket.gettime(); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
803 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
|
804 for question,o in pairs(queries) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
805 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
|
806 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
|
807 if o.server > #self.server then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
808 o.server = 1; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
809 end |
| 337 | 810 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
811 o.retries = (o.retries or 0) + 1; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
812 if o.retries >= #self.server then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
813 --print('timeout'); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
814 queries[question] = nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
815 else |
|
6509
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
816 sock, err = self:getsocket(o.server); |
|
6508
4a28b8320d7f
net.dns: Return new socket from servfail
Kim Alvefur <zash@zash.se>
parents:
6463
diff
changeset
|
817 if sock then sock:send(o.packet); end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
818 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
819 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
820 end |
|
5266
5c3a3ef6b769
net.dns: Clean up query list when a server is marked down
Matthew Wild <mwild1@gmail.com>
parents:
4422
diff
changeset
|
821 if next(queries) == nil then |
|
5c3a3ef6b769
net.dns: Clean up query list when a server is marked down
Matthew Wild <mwild1@gmail.com>
parents:
4422
diff
changeset
|
822 self.active[id] = nil; |
|
5c3a3ef6b769
net.dns: Clean up query list when a server is marked down
Matthew Wild <mwild1@gmail.com>
parents:
4422
diff
changeset
|
823 end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
824 end |
|
3540
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
825 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
826 if num == self.best_server then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
827 self.best_server = self.best_server + 1; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
828 if self.best_server > #self.server then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
829 -- Exhausted all servers, try first again |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
830 self.best_server = 1; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
831 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
832 end |
|
6509
7cb69eba3e95
net.dns: Try next server if peer name can not be set (thanks wirehack7)
Kim Alvefur <zash@zash.se>
parents:
6508
diff
changeset
|
833 return sock, err; |
|
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
|
834 end |
| 337 | 835 |
|
3327
b447682f2a8d
net.dns: Make timeout configurable (default 15s)
Matthew Wild <mwild1@gmail.com>
parents:
3326
diff
changeset
|
836 function resolver:settimeout(seconds) |
|
b447682f2a8d
net.dns: Make timeout configurable (default 15s)
Matthew Wild <mwild1@gmail.com>
parents:
3326
diff
changeset
|
837 self.timeout = seconds; |
|
b447682f2a8d
net.dns: Make timeout configurable (default 15s)
Matthew Wild <mwild1@gmail.com>
parents:
3326
diff
changeset
|
838 end |
|
b447682f2a8d
net.dns: Make timeout configurable (default 15s)
Matthew Wild <mwild1@gmail.com>
parents:
3326
diff
changeset
|
839 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
840 function resolver:receive(rset) -- - - - - - - - - - - - - - - - - receive |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
841 --print('receive'); print(self.socket); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
842 self.time = socket.gettime(); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
843 rset = rset or self.socket; |
| 337 | 844 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
845 local response; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
846 for i,sock in pairs(rset) do |
| 337 | 847 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
848 if self.socketset[sock] then |
|
2619
04158baefa34
net.dns: Update for new socket API
Matthew Wild <mwild1@gmail.com>
parents:
2578
diff
changeset
|
849 local packet = sock:receive(); |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
850 if packet then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
851 response = self:decode(packet); |
|
2278
8c10f13c0c20
modulemanager, net.dns: Remove trailing whitespace
Matthew Wild <mwild1@gmail.com>
parents:
2082
diff
changeset
|
852 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:
2069
diff
changeset
|
853 and self.active[response.header.id][response.question.raw] then |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
854 --print('received response'); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
855 --self.print(response); |
| 337 | 856 |
|
2082
1381b2071c2e
net.dns: Be more strict about the records we cache
Matthew Wild <mwild1@gmail.com>
parents:
2081
diff
changeset
|
857 for j,rr in pairs(response.answer) do |
|
6863
88d54bec26b7
net.dns: Unconditionally cache records found in answers
Matthew Wild <mwild1@gmail.com>
parents:
6645
diff
changeset
|
858 self:remember(rr, response.question[1].type) |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
859 end |
| 337 | 860 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
861 -- retire the query |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
862 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
|
863 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
|
864 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
865 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
|
866 if not next(self.active) then self:closeall(); end |
| 337 | 867 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
868 -- 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
|
869 local q = response.question[1]; |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
870 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
|
871 if cos then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
872 for co in pairs(cos) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
873 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
|
874 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
875 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
|
876 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
877 end |
|
5266
5c3a3ef6b769
net.dns: Clean up query list when a server is marked down
Matthew Wild <mwild1@gmail.com>
parents:
4422
diff
changeset
|
878 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
879 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
880 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
881 end |
| 337 | 882 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
883 return response; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
884 end |
| 337 | 885 |
| 886 | |
|
3512
e344b00f2cc9
net.dns: Add 'force' parameter to resolver:feed() to force decoding a packet even if it doesn't match an outstanding request
Matthew Wild <mwild1@gmail.com>
parents:
3360
diff
changeset
|
887 function resolver:feed(sock, packet, force) |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
888 --print('receive'); print(self.socket); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
889 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
|
890 |
|
3512
e344b00f2cc9
net.dns: Add 'force' parameter to resolver:feed() to force decoding a packet even if it doesn't match an outstanding request
Matthew Wild <mwild1@gmail.com>
parents:
3360
diff
changeset
|
891 local response = self:decode(packet, force); |
|
2300
e182b5029ef2
net.dns: Port some DNS fixes to the resolver:feed() function for net.adns to use
Matthew Wild <mwild1@gmail.com>
parents:
2278
diff
changeset
|
892 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:
2278
diff
changeset
|
893 and self.active[response.header.id][response.question.raw] then |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
894 --print('received response'); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
895 --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
|
896 |
|
2300
e182b5029ef2
net.dns: Port some DNS fixes to the resolver:feed() function for net.adns to use
Matthew Wild <mwild1@gmail.com>
parents:
2278
diff
changeset
|
897 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:
2278
diff
changeset
|
898 self:remember(rr, response.question[1].type); |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
899 end |
|
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
900 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
901 -- retire the query |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
902 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:
2278
diff
changeset
|
903 queries[response.question.raw] = nil; |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
904 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
|
905 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
|
906 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
907 -- was the query on the wanted list? |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
908 local q = response.question[1]; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
909 if q then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
910 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
|
911 if cos then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
912 for co in pairs(cos) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
913 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
|
914 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
915 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
|
916 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
917 end |
|
2742
6c0a081cd766
net.dns: Trailing whitespace
Matthew Wild <mwild1@gmail.com>
parents:
2741
diff
changeset
|
918 end |
|
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
919 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
920 return response; |
|
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
921 end |
|
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
922 |
|
6309
b6f76a52eb36
net.dns: Ensure all pending requests get notified of a timeout when looking up a record (fix for d122420542fb)
Matthew Wild <mwild1@gmail.com>
parents:
6288
diff
changeset
|
923 function resolver:cancel(qclass, qtype, qname) |
|
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
|
924 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:
896
diff
changeset
|
925 if cos then |
|
6309
b6f76a52eb36
net.dns: Ensure all pending requests get notified of a timeout when looking up a record (fix for d122420542fb)
Matthew Wild <mwild1@gmail.com>
parents:
6288
diff
changeset
|
926 for co in pairs(cos) do |
|
b6f76a52eb36
net.dns: Ensure all pending requests get notified of a timeout when looking up a record (fix for d122420542fb)
Matthew Wild <mwild1@gmail.com>
parents:
6288
diff
changeset
|
927 if coroutine.status(co) == "suspended" then coroutine.resume(co); end |
|
3325
b3117a1da834
net.dns, net.adns: Move coroutine-calling logic into resolver:cancel()
Matthew Wild <mwild1@gmail.com>
parents:
3324
diff
changeset
|
928 end |
|
6309
b6f76a52eb36
net.dns: Ensure all pending requests get notified of a timeout when looking up a record (fix for d122420542fb)
Matthew Wild <mwild1@gmail.com>
parents:
6288
diff
changeset
|
929 set(self.wanted, qclass, qtype, qname, nil); |
|
1202
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
896
diff
changeset
|
930 end |
|
e69fafc14491
net.dns: Add support for cancelling a coroutine-based request
Matthew Wild <mwild1@gmail.com>
parents:
896
diff
changeset
|
931 end |
|
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
932 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
933 function resolver:pulse() -- - - - - - - - - - - - - - - - - - - - - pulse |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
934 --print(':pulse'); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
935 while self:receive() do end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
936 if not next(self.active) then return nil; end |
| 337 | 937 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
938 self.time = socket.gettime(); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
939 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
|
940 for question,o in pairs(queries) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
941 if self.time >= o.retry then |
| 337 | 942 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
943 o.server = o.server + 1; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
944 if o.server > #self.server then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
945 o.server = 1; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
946 o.delay = o.delay + 1; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
947 end |
| 337 | 948 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
949 if o.delay > #self.delays then |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
950 --print('timeout'); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
951 queries[question] = nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
952 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
|
953 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
|
954 else |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
955 --print('retry', o.server, o.delay); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
956 local _a = self.socket[o.server]; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
957 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
|
958 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
|
959 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
960 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
961 end |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
962 end |
| 337 | 963 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
964 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
|
965 return nil; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
966 end |
| 337 | 967 |
| 968 | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
969 function resolver:lookup(qname, qtype, qclass) -- - - - - - - - - - lookup |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
970 self:query (qname, qtype, qclass) |
|
3049
e54774bd73a7
net/dns: Fix socket.select timeout.
Brian Cully <bjc@junctionnetworks.com>
parents:
2742
diff
changeset
|
971 while self:pulse() do |
|
3540
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
972 local recvt = {} |
|
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
973 for i, s in ipairs(self.socket) do |
|
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
974 recvt[i] = s |
|
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
975 end |
|
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
976 socket.select(recvt, nil, 4) |
|
bc139431830b
Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents:
3513
diff
changeset
|
977 end |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
978 --print(self.cache); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
979 return self:peek(qname, qtype, qclass); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
980 end |
| 337 | 981 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
982 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
|
983 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
|
984 end |
| 337 | 985 |
|
3746
9719316c854e
net.dns: Add resolver:tohostname() and dns.tohostname()
Matthew Wild <mwild1@gmail.com>
parents:
3719
diff
changeset
|
986 function resolver:tohostname(ip) |
|
9719316c854e
net.dns: Add resolver:tohostname() and dns.tohostname()
Matthew Wild <mwild1@gmail.com>
parents:
3719
diff
changeset
|
987 return dns.lookup(ip:gsub("(%d+)%.(%d+)%.(%d+)%.(%d+)", "%4.%3.%2.%1.in-addr.arpa."), "PTR"); |
|
9719316c854e
net.dns: Add resolver:tohostname() and dns.tohostname()
Matthew Wild <mwild1@gmail.com>
parents:
3719
diff
changeset
|
988 end |
|
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
989 |
|
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
990 --print ---------------------------------------------------------------- print |
| 337 | 991 |
| 992 | |
| 993 local hints = { -- - - - - - - - - - - - - - - - - - - - - - - - - - - hints | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
994 qr = { [0]='query', 'response' }, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
995 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
|
996 aa = { [0]='non-authoritative', 'authoritative' }, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
997 tc = { [0]='complete', 'truncated' }, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
998 rd = { [0]='recursion not desired', 'recursion desired' }, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
999 ra = { [0]='recursion not available', 'recursion available' }, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1000 z = { [0]='(reserved)' }, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1001 rcode = { [0]='no error', 'format error', 'server failure', 'name error', 'not implemented' }, |
| 337 | 1002 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1003 type = dns.type, |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1004 class = dns.class |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1005 }; |
| 337 | 1006 |
| 1007 | |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1008 local function hint(p, s) -- - - - - - - - - - - - - - - - - - - - - - hint |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1009 return (hints[s] and hints[s][p[s]]) or ''; |
|
72357b1c6d88
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parents:
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changeset
|
1010 end |
| 337 | 1011 |
| 1012 | |
|
2069
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diff
changeset
|
1013 function resolver.print(response) -- - - - - - - - - - - - - resolver.print |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1014 for s,s in pairs { 'id', 'qr', 'opcode', 'aa', 'tc', 'rd', 'ra', 'z', |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1015 'rcode', 'qdcount', 'ancount', 'nscount', 'arcount' } do |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1016 print( string.format('%-30s', 'header.'..s), response.header[s], hint(response.header, s) ); |
|
72357b1c6d88
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changeset
|
1017 end |
| 337 | 1018 |
|
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changeset
|
1019 for i,question in ipairs(response.question) do |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1020 print(string.format ('question[%i].name ', i), question.name); |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
1021 print(string.format ('question[%i].type ', i), question.type); |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1022 print(string.format ('question[%i].class ', i), question.class); |
|
72357b1c6d88
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changeset
|
1023 end |
| 337 | 1024 |
|
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Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
1025 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:
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diff
changeset
|
1026 local tmp; |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1027 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
|
1028 for i,rr in pairs(response[s]) do |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1029 for j,t in pairs({ 'name', 'type', 'class', 'ttl', 'rdlength' }) do |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1030 tmp = string.format('%s[%i].%s', s, i, t); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1031 print(string.format('%-30s', tmp), rr[t], hint(rr, t)); |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1032 end |
|
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parents:
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changeset
|
1033 for j,t in pairs(rr) do |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1034 if not common[j] then |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1035 tmp = string.format('%s[%i].%s', s, i, j); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
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parents:
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changeset
|
1036 print(string.format('%-30s %s', tostring(tmp), tostring(t))); |
|
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parents:
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changeset
|
1037 end |
|
72357b1c6d88
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parents:
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changeset
|
1038 end |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1039 end |
|
72357b1c6d88
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changeset
|
1040 end |
|
72357b1c6d88
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diff
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|
1041 end |
| 337 | 1042 |
| 1043 | |
| 1044 -- module api ------------------------------------------------------ module api | |
| 1045 | |
| 1046 | |
| 1047 function dns.resolver () -- - - - - - - - - - - - - - - - - - - - - resolver | |
|
2069
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1048 -- this function seems to be redundant with resolver.new () |
| 337 | 1049 |
|
6310
d232bb1bbe1e
net.dns: Remove unused obsolete code
Matthew Wild <mwild1@gmail.com>
parents:
6309
diff
changeset
|
1050 local r = { active = {}, cache = {}, unsorted = {}, wanted = {}, best_server = 1 }; |
|
2069
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1051 setmetatable (r, resolver); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1052 setmetatable (r.cache, cache_metatable); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1053 setmetatable (r.unsorted, { __mode = 'kv' }); |
|
72357b1c6d88
net.dns: Fixed indentation and coding style.
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parents:
2068
diff
changeset
|
1054 return r; |
|
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1055 end |
| 337 | 1056 |
|
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
1057 local _resolver = dns.resolver(); |
|
60493186fef6
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diff
changeset
|
1058 dns._resolver = _resolver; |
| 337 | 1059 |
|
2069
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parents:
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diff
changeset
|
1060 function dns.lookup(...) -- - - - - - - - - - - - - - - - - - - - - lookup |
|
2573
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1061 return _resolver:lookup(...); |
|
2069
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parents:
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diff
changeset
|
1062 end |
| 337 | 1063 |
|
3746
9719316c854e
net.dns: Add resolver:tohostname() and dns.tohostname()
Matthew Wild <mwild1@gmail.com>
parents:
3719
diff
changeset
|
1064 function dns.tohostname(...) |
|
9719316c854e
net.dns: Add resolver:tohostname() and dns.tohostname()
Matthew Wild <mwild1@gmail.com>
parents:
3719
diff
changeset
|
1065 return _resolver:tohostname(...); |
|
9719316c854e
net.dns: Add resolver:tohostname() and dns.tohostname()
Matthew Wild <mwild1@gmail.com>
parents:
3719
diff
changeset
|
1066 end |
|
9719316c854e
net.dns: Add resolver:tohostname() and dns.tohostname()
Matthew Wild <mwild1@gmail.com>
parents:
3719
diff
changeset
|
1067 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1068 function dns.purge(...) -- - - - - - - - - - - - - - - - - - - - - - purge |
|
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
1069 return _resolver:purge(...); |
|
2069
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parents:
2068
diff
changeset
|
1070 end |
| 337 | 1071 |
|
2069
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Waqas Hussain <waqas20@gmail.com>
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diff
changeset
|
1072 function dns.peek(...) -- - - - - - - - - - - - - - - - - - - - - - - peek |
|
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
1073 return _resolver:peek(...); |
|
2069
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net.dns: Fixed indentation and coding style.
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parents:
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diff
changeset
|
1074 end |
| 337 | 1075 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
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parents:
2068
diff
changeset
|
1076 function dns.query(...) -- - - - - - - - - - - - - - - - - - - - - - query |
|
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
1077 return _resolver:query(...); |
|
2069
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Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
1078 end |
| 337 | 1079 |
|
2575
8f4d69940132
net.dns: Fixed whitespace/indentation.
Waqas Hussain <waqas20@gmail.com>
parents:
2574
diff
changeset
|
1080 function dns.feed(...) -- - - - - - - - - - - - - - - - - - - - - - - feed |
|
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
1081 return _resolver:feed(...); |
|
2069
72357b1c6d88
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Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1082 end |
|
869
09019c452709
net.dns: Add methods necessary for allowing non-blocking DNS lookups
Matthew Wild <mwild1@gmail.com>
parents:
759
diff
changeset
|
1083 |
|
2575
8f4d69940132
net.dns: Fixed whitespace/indentation.
Waqas Hussain <waqas20@gmail.com>
parents:
2574
diff
changeset
|
1084 function dns.cancel(...) -- - - - - - - - - - - - - - - - - - - - - - cancel |
|
2573
60493186fef6
net.dns: Removed some useless indirection to improve readability.
Waqas Hussain <waqas20@gmail.com>
parents:
2425
diff
changeset
|
1085 return _resolver:cancel(...); |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1086 end |
| 337 | 1087 |
|
3328
5ac4fbbfb74d
net.dns: Add dns.settimeout() to set the timeout for the default resolver
Matthew Wild <mwild1@gmail.com>
parents:
3327
diff
changeset
|
1088 function dns.settimeout(...) |
|
5ac4fbbfb74d
net.dns: Add dns.settimeout() to set the timeout for the default resolver
Matthew Wild <mwild1@gmail.com>
parents:
3327
diff
changeset
|
1089 return _resolver:settimeout(...); |
|
5ac4fbbfb74d
net.dns: Add dns.settimeout() to set the timeout for the default resolver
Matthew Wild <mwild1@gmail.com>
parents:
3327
diff
changeset
|
1090 end |
|
5ac4fbbfb74d
net.dns: Add dns.settimeout() to set the timeout for the default resolver
Matthew Wild <mwild1@gmail.com>
parents:
3327
diff
changeset
|
1091 |
|
5566
74ae3e7e8779
net.dns: Add nicer API to cached records
Kim Alvefur <zash@zash.se>
parents:
5340
diff
changeset
|
1092 function dns.cache() |
|
74ae3e7e8779
net.dns: Add nicer API to cached records
Kim Alvefur <zash@zash.se>
parents:
5340
diff
changeset
|
1093 return _resolver.cache; |
|
74ae3e7e8779
net.dns: Add nicer API to cached records
Kim Alvefur <zash@zash.se>
parents:
5340
diff
changeset
|
1094 end |
|
74ae3e7e8779
net.dns: Add nicer API to cached records
Kim Alvefur <zash@zash.se>
parents:
5340
diff
changeset
|
1095 |
|
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
|
1096 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
|
1097 return _resolver:socket_wrapper_set(...); |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1098 end |
| 337 | 1099 |
|
2069
72357b1c6d88
net.dns: Fixed indentation and coding style.
Waqas Hussain <waqas20@gmail.com>
parents:
2068
diff
changeset
|
1100 return dns; |
