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mod_proxy65/mod_proxy65.lua @ 68:0df3e4d1f1a3
mod_proxy65: Reviewed and re-factored the code, added proxy_address to specify the address which the proxy advertises for clients to connect to
author | Matthew Wild <mwild1@gmail.com> |
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date | Sat, 31 Oct 2009 00:41:47 +0000 |
parent | 66:b86ae5e21a56 |
child | 69:87dfd34dceb2 |
rev | line source |
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1 -- Copyright (C) 2009 Thilo Cestonaro |
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2 -- |
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3 -- This project is MIT/X11 licensed. Please see the |
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4 -- COPYING file in the source package for more information. |
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5 -- |
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6 |
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7 if module:get_host_type() ~= "component" then |
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8 error("proxy65 should be loaded as a component, please see http://prosody.im/doc/components", 0); |
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9 end |
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10 |
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11 |
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12 local jid_split = require "util.jid".split; |
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13 local st = require "util.stanza"; |
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14 local component_register = require "core.componentmanager".register_component; |
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15 local component_deregister = require "core.componentmanager".deregister_component; |
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16 local configmanager = require "core.configmanager"; |
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17 local config_get = require "core.configmanager".get; |
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18 local connlisteners_register = require "net.connlisteners".register; |
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19 local connlisteners_start = require "net.connlisteners".start; |
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20 local connlisteners_deregister = require "net.connlisteners".deregister; |
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21 local adns, dns = require "net.adns", require "net.dns"; |
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22 local add_task = require "util.timer".add_task; |
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23 local max_dns_depth = config.get("*", "core", "dns_max_depth") or 3; |
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24 local dns_timeout = config.get("*", "core", "dns_timeout") or 60; |
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25 local sha1 = require "util.hashes".sha1; |
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26 |
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27 local replies_cache = {}; |
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28 local host = module:get_host(); |
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29 local name = "SOCKS5 Bytestreams Service"; |
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30 local sessions, transfers, component = {}, {}, nil; |
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31 |
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32 local proxy_port = config_get(host, "core", "proxy65_port") or 5000; |
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33 local proxy_interface = config_get(host, "core", "proxy65_interface") or "*"; |
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34 local proxy_address = config_get(host, "core", "proxy65_address") or (proxy_interface ~= "*" and proxy_interface) or module.host; |
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35 |
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36 local connlistener = { |
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37 registered = false, default_port = proxy_port, |
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38 default_interface = proxy_interface, default_mode = "*a" |
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39 }; |
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40 |
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41 local function bin2hex(bin) |
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42 return bin:gsub(".", function (c) return ("%02x"):format(c:byte()); end) |
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43 end |
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44 |
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45 function new_session(conn) |
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46 local w = function(s) conn.write(s:gsub("\n", "\r\n")); end; |
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47 local session = { conn = conn; |
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48 send = function (t) w(tostring(t)); end; |
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49 disconnect = function () conn.close(); end; |
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50 }; |
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51 return session; |
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52 end |
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53 |
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54 function connlistener.listener(conn, data) |
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55 local session = sessions[conn]; |
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56 |
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57 if session == nil and data ~= nil and data:sub(1):byte() == 0x05 and data:len() > 2 then |
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58 local nmethods = data:sub(2):byte(); |
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59 local methods = data:sub(3); |
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60 local supported = false; |
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61 for i=1, nmethods, 1 do |
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62 if(methods:sub(i):byte() == 0x00) then -- 0x00 == method: NO AUTH |
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63 supported = true; |
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64 break; |
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65 end |
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66 end |
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67 if(supported) then |
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68 module:log("debug", "new session found ... ") |
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69 session = new_session(conn); |
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70 sessions[conn] = session; |
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71 session.send(string.char(5, 0)); |
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72 end |
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73 return; |
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74 end |
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75 if session ~= nil then |
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76 if session.sha ~= nil and transfers[session.sha] ~= nil then |
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77 local sha = session.sha; |
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78 if transfers[sha].activated == true and transfers[sha].initiator == conn and transfers[sha].target ~= nil then |
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79 transfers[sha].target.write(data); |
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80 return; |
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81 end |
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82 end |
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83 if data ~= nil and data:len() == 0x2F and -- 40 == length of SHA1 HASH, and 7 other bytes => 47 => 0x2F |
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84 data:sub(1):byte() == 0x05 and -- SOCKS5 has 5 in first byte |
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85 data:sub(2):byte() == 0x01 and -- CMD must be 1 |
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86 data:sub(3):byte() == 0x00 and -- RSV must be 0 |
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87 data:sub(4):byte() == 0x03 and -- ATYP must be 3 |
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88 data:sub(5):byte() == 40 and -- SHA1 HASH length must be 64 (0x40) |
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89 data:sub(-2):byte() == 0x00 and -- PORT must be 0, size 2 byte |
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90 data:sub(-1):byte() == 0x00 |
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91 then |
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92 local sha = data:sub(6, 45); -- second param is not count! it's the ending index (included!) |
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93 if transfers[sha] == nil then |
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94 transfers[sha] = {}; |
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95 transfers[sha].activated = false; |
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96 transfers[sha].target = conn; |
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97 session.sha = sha; |
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98 module:log("debug", "target connected ... "); |
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99 elseif transfers[sha].target ~= nil then |
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100 transfers[sha].initiator = conn; |
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101 session.sha = sha; |
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102 module:log("debug", "initiator connected ... "); |
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103 end |
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104 session.send(string.char(5, 0, 0, 3, sha:len()) .. sha .. string.char(0, 0)); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte) |
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105 end |
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106 end |
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107 end |
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108 |
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109 function connlistener.disconnect(conn, err) |
68
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110 if sessions[conn] then |
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111 -- Clean up any session-related stuff here |
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112 sessions[conn] = nil; |
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113 end |
65
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114 end |
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115 |
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116 local function get_disco_info(stanza) |
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117 local reply = replies_cache.disco_info; |
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118 if reply == nil then |
68
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119 reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#info") |
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120 :tag("identity", {category='proxy', type='bytestreams', name=name}):up() |
65
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121 :tag("feature", {var="http://jabber.org/protocol/bytestreams"}); |
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122 replies_cache.disco_info = reply; |
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123 end |
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124 |
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125 reply.attr.id = stanza.attr.id; |
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126 reply.attr.to = stanza.attr.from; |
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127 return reply; |
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128 end |
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129 |
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130 local function get_disco_items(stanza) |
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131 local reply = replies_cache.disco_items; |
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132 if reply == nil then |
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133 reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#items"); |
65
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134 replies_cache.disco_info = reply; |
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135 end |
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136 |
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137 reply.attr.id = stanza.attr.id; |
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138 reply.attr.to = stanza.attr.from; |
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139 return reply; |
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140 end |
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141 |
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142 local function get_stream_host(stanza) |
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143 local reply = replies_cache.stream_host; |
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144 local sid = stanza.tags[1].attr.sid; |
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145 if reply == nil then |
68
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|
146 reply = st.iq({type="result", from=host}) |
65
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147 :query("http://jabber.org/protocol/bytestreams") |
68
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148 :tag("streamhost", {jid=host, host=proxy_address, port=proxy_port}); -- TODO get the correct data |
65
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|
149 replies_cache.stream_host = reply; |
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150 end |
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|
151 |
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152 reply.attr.id = stanza.attr.id; |
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|
153 reply.attr.to = stanza.attr.from; |
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|
154 reply.tags[1].attr.sid = sid; |
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155 return reply; |
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|
156 end |
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|
157 |
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|
158 module.unload = function() |
68
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159 component_deregister(host); |
65
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|
160 connlisteners_deregister("proxy65"); |
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|
161 end |
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|
162 |
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|
163 local function set_activation(stanza) |
68
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164 local from, to, sid, reply = nil; |
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165 from = stanza.attr.from; |
65
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|
166 if stanza.tags[1] ~= nil and tostring(stanza.tags[1].name) == "query" then |
a35eb0764ac6
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|
167 if stanza.tags[1].attr ~= nil then |
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|
168 sid = stanza.tags[1].attr.sid; |
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|
169 end |
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|
170 if stanza.tags[1].tags[1] ~= nil and tostring(stanza.tags[1].tags[1].name) == "activate" then |
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|
171 to = stanza.tags[1].tags[1][1]; |
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|
172 end |
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173 end |
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|
174 if from ~= nil and to ~= nil and sid ~= nil then |
68
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|
175 reply = st.iq({type="result", from=host}); |
65
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176 reply.attr.id = stanza.attr.id; |
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|
177 end |
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178 return reply, from, to, sid; |
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179 end |
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180 |
68
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|
181 function handle_to_domain(origin, stanza) |
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|
182 local to_node, to_host, to_resource = jid_split(stanza.attr.to); |
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183 if to_node == nil then |
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|
184 local type = stanza.attr.type; |
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185 if type == "error" or type == "result" then return; end |
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|
186 if stanza.name == "iq" and type == "get" then |
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|
187 local xmlns = stanza.tags[1].attr.xmlns |
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diff
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|
188 if xmlns == "http://jabber.org/protocol/disco#info" then |
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|
189 origin.send(get_disco_info(stanza)); |
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|
190 return true; |
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diff
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|
191 elseif xmlns == "http://jabber.org/protocol/disco#items" then |
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diff
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|
192 origin.send(get_disco_items(stanza)); |
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|
193 return true; |
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diff
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|
194 elseif xmlns == "http://jabber.org/protocol/bytestreams" then |
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|
195 origin.send(get_stream_host(stanza)); |
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|
196 return true; |
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197 end |
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|
198 elseif stanza.name == "iq" and type == "set" then |
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|
199 local reply, from, to, sid = set_activation(stanza); |
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|
200 if reply ~= nil and from ~= nil and to ~= nil and sid ~= nil then |
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diff
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|
201 local sha = sha1(sid .. from .. to, true); |
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diff
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|
202 if transfers[sha] == nil then |
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diff
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|
203 module:log("error", "transfers[sha]: nil"); |
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66
diff
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|
204 elseif(transfers[sha] ~= nil and transfers[sha].initiator ~= nil and transfers[sha].target ~= nil) then |
0df3e4d1f1a3
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diff
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|
205 origin.send(reply); |
0df3e4d1f1a3
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66
diff
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|
206 transfers[sha].activated = true; |
64
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|
207 end |
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|
208 end |
68
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209 end |
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210 end |
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211 return; |
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212 end |
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213 |
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214 if not connlisteners_register('proxy65', connlistener) then |
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215 error("mod_proxy65: Could not establish a connection listener. Check your configuration please."); |
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216 end |
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217 |
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218 connlisteners_start('proxy65'); |
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219 component = component_register(host, handle_to_domain); |