Mercurial > prosody-modules

annotate mod_proxy65/mod_proxy65.lua @ 69:87dfd34dceb2

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mod_proxy65: removed unneeded var and session stuff
author Thilo Cestonaro <thilo@cestona.ro>
date Sat, 31 Oct 2009 09:26:38 +0100
parents 0df3e4d1f1a3
children d3afb1403aa7
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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 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 connlistener.listener(conn, data)
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46 local session = sessions[conn] or { alreadySeen = false, sha = nil };
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47
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48 if session.alreadySeen == false and data ~= nil and data:sub(1):byte() == 0x05 and data:len() > 2 then
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49 local nmethods = data:sub(2):byte();
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50 local methods = data:sub(3);
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51 local supported = false;
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52 for i=1, nmethods, 1 do
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53 if(methods:sub(i):byte() == 0x00) then -- 0x00 == method: NO AUTH
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54 supported = true;
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55 break;
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56 end
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57 end
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58 if(supported) then
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59 module:log("debug", "new session found ... ")
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60 session.alreadySeen = true;
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61 sessions[conn] = session;
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62 conn.write(string.char(5, 0));
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63 end
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64 return;
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65 end
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66 if session.alreadySeen == true then
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67 if session.sha ~= nil and transfers[session.sha] ~= nil then
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68 local sha = session.sha;
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69 if transfers[sha].activated == true and transfers[sha].initiator == conn and transfers[sha].target ~= nil then
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70 transfers[sha].target.write(data);
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71 return;
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72 end
65
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73 end
66
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74 if data ~= nil and data:len() == 0x2F and -- 40 == length of SHA1 HASH, and 7 other bytes => 47 => 0x2F
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75 data:sub(1):byte() == 0x05 and -- SOCKS5 has 5 in first byte
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76 data:sub(2):byte() == 0x01 and -- CMD must be 1
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77 data:sub(3):byte() == 0x00 and -- RSV must be 0
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78 data:sub(4):byte() == 0x03 and -- ATYP must be 3
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79 data:sub(5):byte() == 40 and -- SHA1 HASH length must be 64 (0x40)
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80 data:sub(-2):byte() == 0x00 and -- PORT must be 0, size 2 byte
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81 data:sub(-1):byte() == 0x00
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82 then
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83 local sha = data:sub(6, 45); -- second param is not count! it's the ending index (included!)
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84 if transfers[sha] == nil then
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85 transfers[sha] = {};
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86 transfers[sha].activated = false;
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87 transfers[sha].target = conn;
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88 session.sha = sha;
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89 module:log("debug", "target connected ... ");
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90 elseif transfers[sha].target ~= nil then
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91 transfers[sha].initiator = conn;
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92 session.sha = sha;
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93 module:log("debug", "initiator connected ... ");
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94 end
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95 conn.write(string.char(5, 0, 0, 3, sha:len()) .. sha .. string.char(0, 0)); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte)
66
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96 end
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97 end
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98 end
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99
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100 function connlistener.disconnect(conn, err)
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101 if sessions[conn] then
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102 -- Clean up any session-related stuff here
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103 sessions[conn] = nil;
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104 end
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105 end
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106
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107 local function get_disco_info(stanza)
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108 local reply = replies_cache.disco_info;
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109 if reply == nil then
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110 reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#info")
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111 :tag("identity", {category='proxy', type='bytestreams', name=name}):up()
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112 :tag("feature", {var="http://jabber.org/protocol/bytestreams"});
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113 replies_cache.disco_info = reply;
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114 end
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115
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116 reply.attr.id = stanza.attr.id;
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117 reply.attr.to = stanza.attr.from;
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118 return reply;
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119 end
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120
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121 local function get_disco_items(stanza)
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122 local reply = replies_cache.disco_items;
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123 if reply == nil then
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124 reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#items");
65
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125 replies_cache.disco_info = reply;
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126 end
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127
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128 reply.attr.id = stanza.attr.id;
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129 reply.attr.to = stanza.attr.from;
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130 return reply;
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131 end
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132
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133 local function get_stream_host(stanza)
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134 local reply = replies_cache.stream_host;
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135 local sid = stanza.tags[1].attr.sid;
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136 if reply == nil then
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137 reply = st.iq({type="result", from=host})
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138 :query("http://jabber.org/protocol/bytestreams")
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139 :tag("streamhost", {jid=host, host=proxy_address, port=proxy_port}); -- TODO get the correct data
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140 replies_cache.stream_host = reply;
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141 end
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142
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143 reply.attr.id = stanza.attr.id;
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144 reply.attr.to = stanza.attr.from;
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145 reply.tags[1].attr.sid = sid;
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146 return reply;
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147 end
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148
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149 module.unload = function()
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150 component_deregister(host);
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151 connlisteners_deregister("proxy65");
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152 end
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153
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154 local function set_activation(stanza)
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155 local from, to, sid, reply = nil;
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156 from = stanza.attr.from;
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157 if stanza.tags[1] ~= nil and tostring(stanza.tags[1].name) == "query" then
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158 if stanza.tags[1].attr ~= nil then
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159 sid = stanza.tags[1].attr.sid;
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160 end
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161 if stanza.tags[1].tags[1] ~= nil and tostring(stanza.tags[1].tags[1].name) == "activate" then
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162 to = stanza.tags[1].tags[1][1];
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163 end
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164 end
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165 if from ~= nil and to ~= nil and sid ~= nil then
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166 reply = st.iq({type="result", from=host});
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167 reply.attr.id = stanza.attr.id;
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168 end
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169 return reply, from, to, sid;
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170 end
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171
68
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172 function handle_to_domain(origin, stanza)
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173 local to_node, to_host, to_resource = jid_split(stanza.attr.to);
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174 if to_node == nil then
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175 local type = stanza.attr.type;
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176 if type == "error" or type == "result" then return; end
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177 if stanza.name == "iq" and type == "get" then
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178 local xmlns = stanza.tags[1].attr.xmlns
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179 if xmlns == "http://jabber.org/protocol/disco#info" then
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180 origin.send(get_disco_info(stanza));
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181 return true;
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182 elseif xmlns == "http://jabber.org/protocol/disco#items" then
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183 origin.send(get_disco_items(stanza));
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184 return true;
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185 elseif xmlns == "http://jabber.org/protocol/bytestreams" then
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186 origin.send(get_stream_host(stanza));
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187 return true;
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188 end
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189 elseif stanza.name == "iq" and type == "set" then
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diff changeset
190 local reply, from, to, sid = set_activation(stanza);
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diff changeset
191 if reply ~= nil and from ~= nil and to ~= nil and sid ~= nil then
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
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diff changeset
192 local sha = sha1(sid .. from .. to, true);
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diff changeset
193 if transfers[sha] == nil then
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
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194 module:log("error", "transfers[sha]: nil");
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diff changeset
195 elseif(transfers[sha] ~= nil and transfers[sha].initiator ~= nil and transfers[sha].target ~= nil) then
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diff changeset
196 origin.send(reply);
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diff changeset
197 transfers[sha].activated = true;
64
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parents:
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198 end
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parents:
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199 end
68
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parents: 66
diff changeset
200 end
64
853c3c7e9936 mod_proxy65: remove the proxy65 folder
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parents:
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201 end
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
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parents: 66
diff changeset
202 return;
64
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parents:
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203 end
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parents:
diff changeset
204
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
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parents: 66
diff changeset
205 if not connlisteners_register('proxy65', connlistener) then
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
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parents: 66
diff changeset
206 error("mod_proxy65: Could not establish a connection listener. Check your configuration please.");
64
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parents:
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207 end
853c3c7e9936 mod_proxy65: remove the proxy65 folder
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parents:
diff changeset
208
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
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parents: 66
diff changeset
209 connlisteners_start('proxy65');
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
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parents: 66
diff changeset
210 component = component_register(host, handle_to_domain);