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annotate mod_proxy65/mod_proxy65.lua @ 73:adb9d1b879c2

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mod_proxy65: changed the listener name to be unique on a per component basis and display a good error description when connlistener register fails
author Thilo Cestonaro <thilo@cestona.ro>
date Sat, 31 Oct 2009 20:53:52 +0100
parents 2bf6c7c590a1
children d70813f7d90a
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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 local jid_split = require "util.jid".split;
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12 local st = require "util.stanza";
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13 local componentmanager = require "core.componentmanager";
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14 local config_get = require "core.configmanager".get;
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15 local connlisteners = require "net.connlisteners";
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16 local adns, dns = require "net.adns", require "net.dns";
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17 local add_task = require "util.timer".add_task;
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18 local max_dns_depth = config.get("*", "core", "dns_max_depth") or 3;
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19 local dns_timeout = config.get("*", "core", "dns_timeout") or 60;
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20 local sha1 = require "util.hashes".sha1;
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21
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22 local host, name = module:get_host(), "SOCKS5 Bytestreams Service";
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23 local sessions, transfers, component, replies_cache = {}, {}, nil, {};
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24
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25 local proxy_port = config_get(host, "core", "proxy65_port") or 5000;
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26 local proxy_interface = config_get(host, "core", "proxy65_interface") or "*";
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27 local proxy_address = config_get(host, "core", "proxy65_address") or (proxy_interface ~= "*" and proxy_interface) or module.host;
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28
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29 local connlistener = { default_port = proxy_port,
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30 default_interface = proxy_interface,
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31 default_mode = "*a" };
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32
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33 function connlistener.listener(conn, data)
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34 local session = sessions[conn] or {};
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35
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36 if session.setup == false and data ~= nil and data:sub(1):byte() == 0x05 and data:len() > 2 then
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37 local nmethods = data:sub(2):byte();
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38 local methods = data:sub(3);
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39 local supported = false;
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40 for i=1, nmethods, 1 do
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41 if(methods:sub(i):byte() == 0x00) then -- 0x00 == method: NO AUTH
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42 supported = true;
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43 break;
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44 end
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45 end
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46 if(supported) then
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47 module:log("debug", "new session found ... ")
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48 session.setup = true;
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49 sessions[conn] = session;
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50 conn.write(string.char(5, 0));
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51 end
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52 return;
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53 end
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54 if session.setup then
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55 if session.sha ~= nil and transfers[session.sha] ~= nil then
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56 local sha = session.sha;
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57 if transfers[sha].activated == true and transfers[sha].initiator == conn and transfers[sha].target ~= nil then
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58 transfers[sha].target.write(data);
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59 return;
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60 end
65
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61 end
66
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62 if data ~= nil and data:len() == 0x2F and -- 40 == length of SHA1 HASH, and 7 other bytes => 47 => 0x2F
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63 data:sub(1):byte() == 0x05 and -- SOCKS5 has 5 in first byte
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64 data:sub(2):byte() == 0x01 and -- CMD must be 1
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65 data:sub(3):byte() == 0x00 and -- RSV must be 0
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66 data:sub(4):byte() == 0x03 and -- ATYP must be 3
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67 data:sub(5):byte() == 40 and -- SHA1 HASH length must be 64 (0x40)
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68 data:sub(-2):byte() == 0x00 and -- PORT must be 0, size 2 byte
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69 data:sub(-1):byte() == 0x00
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70 then
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71 local sha = data:sub(6, 45); -- second param is not count! it's the ending index (included!)
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72 if transfers[sha] == nil then
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73 transfers[sha] = {};
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74 transfers[sha].activated = false;
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75 transfers[sha].target = conn;
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76 session.sha = sha;
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77 module:log("debug", "target connected ... ");
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78 elseif transfers[sha].target ~= nil then
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79 transfers[sha].initiator = conn;
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80 session.sha = sha;
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81 module:log("debug", "initiator connected ... ");
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82 end
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83 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)
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84 end
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85 end
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86 end
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87
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88 function connlistener.disconnect(conn, err)
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89 if sessions[conn] then
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90 -- Clean up any session-related stuff here
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91 sessions[conn] = nil;
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92 end
65
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93 end
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94
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95 local function get_disco_info(stanza)
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96 local reply = replies_cache.disco_info;
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97 if reply == nil then
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98 reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#info")
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99 :tag("identity", {category='proxy', type='bytestreams', name=name}):up()
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100 :tag("feature", {var="http://jabber.org/protocol/bytestreams"});
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101 replies_cache.disco_info = reply;
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102 end
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103
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104 reply.attr.id = stanza.attr.id;
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105 reply.attr.to = stanza.attr.from;
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106 return reply;
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107 end
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108
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109 local function get_disco_items(stanza)
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110 local reply = replies_cache.disco_items;
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111 if reply == nil then
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112 reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#items");
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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_stream_host(stanza)
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122 local reply = replies_cache.stream_host;
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123 local sid = stanza.tags[1].attr.sid;
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124 if reply == nil then
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125 reply = st.iq({type="result", from=host})
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126 :query("http://jabber.org/protocol/bytestreams")
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127 :tag("streamhost", {jid=host, host=proxy_address, port=proxy_port}); -- TODO get the correct data
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128 replies_cache.stream_host = reply;
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129 end
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130
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131 reply.attr.id = stanza.attr.id;
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132 reply.attr.to = stanza.attr.from;
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133 reply.tags[1].attr.sid = sid;
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134 return reply;
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135 end
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136
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137 module.unload = function()
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138 componentmanager.deregister_component(host);
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139 connlisteners.deregister("proxy65");
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140 end
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141
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142 local function set_activation(stanza)
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143 local from, to, sid, reply = nil;
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144 from = stanza.attr.from;
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145 if stanza.tags[1] ~= nil and tostring(stanza.tags[1].name) == "query" then
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146 if stanza.tags[1].attr ~= nil then
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147 sid = stanza.tags[1].attr.sid;
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148 end
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149 if stanza.tags[1].tags[1] ~= nil and tostring(stanza.tags[1].tags[1].name) == "activate" then
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150 to = stanza.tags[1].tags[1][1];
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151 end
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152 end
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153 if from ~= nil and to ~= nil and sid ~= nil then
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154 reply = st.iq({type="result", from=host});
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155 reply.attr.id = stanza.attr.id;
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156 end
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157 return reply, from, to, sid;
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158 end
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159
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160 function handle_to_domain(origin, stanza)
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161 local to_node, to_host, to_resource = jid_split(stanza.attr.to);
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162 if to_node == nil then
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163 local type = stanza.attr.type;
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164 if type == "error" or type == "result" then return; end
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165 if stanza.name == "iq" and type == "get" then
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166 local xmlns = stanza.tags[1].attr.xmlns
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167 if xmlns == "http://jabber.org/protocol/disco#info" then
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168 origin.send(get_disco_info(stanza));
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169 return true;
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170 elseif xmlns == "http://jabber.org/protocol/disco#items" then
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171 origin.send(get_disco_items(stanza));
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172 return true;
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173 elseif xmlns == "http://jabber.org/protocol/bytestreams" then
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174 origin.send(get_stream_host(stanza));
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175 return true;
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176 end
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177 elseif stanza.name == "iq" and type == "set" then
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178 local reply, from, to, sid = set_activation(stanza);
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179 if reply ~= nil and from ~= nil and to ~= nil and sid ~= nil then
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180 local sha = sha1(sid .. from .. to, true);
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181 if transfers[sha] == nil then
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182 module:log("error", "transfers[sha]: nil");
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183 elseif(transfers[sha] ~= nil and transfers[sha].initiator ~= nil and transfers[sha].target ~= nil) then
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diff changeset
184 origin.send(reply);
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diff changeset
185 transfers[sha].activated = true;
64
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186 end
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187 end
68
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188 end
64
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189 end
68
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190 return;
64
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191 end
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parents:
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192
73
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diff changeset
193 if not connlisteners.register(module.host .. ':proxy65', connlistener) then
68
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194 error("mod_proxy65: Could not establish a connection listener. Check your configuration please.");
73
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195 error(" one possible cause for this would be that two proxy65 components share the same port.");
64
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parents:
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196 end
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parents:
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197
70
d3afb1403aa7 mod_proxy65: Remove unused bin2hex function, and compact more code. Finally down <200 lines :)
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diff changeset
198 connlisteners.start('proxy65');
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diff changeset
199 component = componentmanager.register_component(host, handle_to_domain);