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plugins/mod_proxy65.lua @ 2153:08b643dc00df
Merge with trunk
author | Matthew Wild <mwild1@gmail.com> |
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date | Mon, 23 Nov 2009 16:30:34 +0000 |
parent | 2138:8bb1a2d82896 |
child | 2244:730038d3e9e3 |
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 * to restart the proxy in the console: e.g. |
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8 module:unload("proxy65"); |
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9 > server.removeserver(<proxy65_port>); |
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10 module:load("proxy65", <proxy65_jid>); |
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11 ]]-- |
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12 |
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13 if module:get_host_type() ~= "component" then |
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14 error("proxy65 should be loaded as a component, please see http://prosody.im/doc/components", 0); |
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15 end |
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16 |
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17 local jid_split = require "util.jid".split; |
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18 local st = require "util.stanza"; |
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19 local componentmanager = require "core.componentmanager"; |
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20 local config_get = require "core.configmanager".get; |
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21 local connlisteners = require "net.connlisteners"; |
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22 local sha1 = require "util.hashes".sha1; |
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23 |
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24 local host, name = module:get_host(), "SOCKS5 Bytestreams Service"; |
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25 local sessions, transfers, component, replies_cache = {}, {}, nil, {}; |
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26 |
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27 local proxy_port = config_get(host, "core", "proxy65_port") or 5000; |
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28 local proxy_interface = config_get(host, "core", "proxy65_interface") or "*"; |
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29 local proxy_address = config_get(host, "core", "proxy65_address") or (proxy_interface ~= "*" and proxy_interface) or host; |
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30 local proxy_acl = config_get(host, "core", "proxy65_acl"); |
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31 |
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32 local connlistener = { default_port = proxy_port, default_interface = proxy_interface, default_mode = "*a" }; |
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33 |
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34 function connlistener.listener(conn, data) |
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35 local session = sessions[conn] or {}; |
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36 |
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37 if session.setup == nil and data ~= nil and data:sub(1):byte() == 0x05 and data:len() > 2 then |
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38 local nmethods = data:sub(2):byte(); |
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39 local methods = data:sub(3); |
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40 local supported = false; |
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41 for i=1, nmethods, 1 do |
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42 if(methods:sub(i):byte() == 0x00) then -- 0x00 == method: NO AUTH |
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43 supported = true; |
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44 break; |
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45 end |
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46 end |
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47 if(supported) then |
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48 module:log("debug", "new session found ... ") |
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49 session.setup = true; |
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50 sessions[conn] = session; |
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51 conn:write(string.char(5, 0)); |
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52 end |
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53 return; |
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54 end |
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55 if session.setup then |
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56 if session.sha ~= nil and transfers[session.sha] ~= nil then |
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57 local sha = session.sha; |
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58 if transfers[sha].activated == true and transfers[sha].initiator == conn and transfers[sha].target ~= nil then |
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59 transfers[sha].target:write(data); |
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60 return; |
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61 end |
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62 end |
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63 if data ~= nil and data:len() == 0x2F and -- 40 == length of SHA1 HASH, and 7 other bytes => 47 => 0x2F |
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64 data:sub(1):byte() == 0x05 and -- SOCKS5 has 5 in first byte |
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65 data:sub(2):byte() == 0x01 and -- CMD must be 1 |
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66 data:sub(3):byte() == 0x00 and -- RSV must be 0 |
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67 data:sub(4):byte() == 0x03 and -- ATYP must be 3 |
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68 data:sub(5):byte() == 40 and -- SHA1 HASH length must be 40 (0x28) |
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69 data:sub(-2):byte() == 0x00 and -- PORT must be 0, size 2 byte |
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70 data:sub(-1):byte() == 0x00 |
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71 then |
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72 local sha = data:sub(6, 45); -- second param is not count! it's the ending index (included!) |
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73 if transfers[sha] == nil then |
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74 transfers[sha] = {}; |
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75 transfers[sha].activated = false; |
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76 transfers[sha].target = conn; |
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77 session.sha = sha; |
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78 module:log("debug", "target connected ... "); |
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79 elseif transfers[sha].target ~= nil then |
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80 transfers[sha].initiator = conn; |
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81 session.sha = sha; |
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82 module:log("debug", "initiator connected ... "); |
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83 end |
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84 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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85 else |
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86 log:module("warn", "Neither data transfer nor initial connect of a participator of a transfer.") |
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87 conn.close(); |
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88 end |
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89 else |
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90 if data ~= nil then |
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91 module:log("warn", "unknown connection with no authentication data -> closing it"); |
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92 conn.close(); |
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93 end |
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94 end |
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95 end |
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96 |
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97 function connlistener.disconnect(conn, err) |
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98 local session = sessions[conn]; |
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99 if session then |
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100 if session.sha and transfers[session.sha] then |
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101 local initiator, target = transfers[session.sha].initiator, transfers[session.sha].target; |
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102 if initiator == conn and target ~= nil then |
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103 target.close(); |
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104 elseif target == conn and initiator ~= nil then |
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105 initiator.close(); |
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106 end |
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107 transfers[session.sha] = nil; |
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108 end |
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109 -- Clean up any session-related stuff here |
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110 sessions[conn] = nil; |
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111 end |
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112 end |
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113 |
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114 local function get_disco_info(stanza) |
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115 local reply = replies_cache.disco_info; |
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116 if reply == nil then |
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117 reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#info") |
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118 :tag("identity", {category='proxy', type='bytestreams', name=name}):up() |
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119 :tag("feature", {var="http://jabber.org/protocol/bytestreams"}); |
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120 replies_cache.disco_info = reply; |
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121 end |
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122 |
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123 reply.attr.id = stanza.attr.id; |
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124 reply.attr.to = stanza.attr.from; |
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125 return reply; |
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|
126 end |
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127 |
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parents:
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128 local function get_disco_items(stanza) |
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129 local reply = replies_cache.disco_items; |
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130 if reply == nil then |
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131 reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#items"); |
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132 replies_cache.disco_items = reply; |
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|
133 end |
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134 |
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135 reply.attr.id = stanza.attr.id; |
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136 reply.attr.to = stanza.attr.from; |
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137 return reply; |
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|
138 end |
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139 |
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140 local function _jid_join(node, host, resource) |
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141 local ret = host; |
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142 if ret then |
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143 if node then |
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144 ret = node .. "@" .. ret; |
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145 end |
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|
146 if resource then |
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147 ret = ret .. "/" .. resource; |
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148 end |
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149 end |
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150 return ret; |
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151 end |
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|
152 |
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153 local function get_stream_host(origin, stanza) |
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154 local reply = replies_cache.stream_host; |
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155 local err_reply = replies_cache.stream_host_err; |
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156 local sid = stanza.tags[1].attr.sid; |
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157 local allow = false; |
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158 local jid_node, jid_host, jid_resource = jid_split(stanza.attr.from); |
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159 |
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160 if stanza.attr.from == nil then |
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161 jid_node = origin.username; |
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162 jid_host = origin.host; |
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163 jid_resource = origin.resource; |
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164 end |
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165 |
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|
166 if proxy_acl and #proxy_acl > 0 then |
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167 if host ~= nil then -- at least a domain is needed. |
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parents:
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|
168 for _, acl in ipairs(proxy_acl) do |
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169 local acl_node, acl_host, acl_resource = jid_split(acl); |
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170 if ((acl_node ~= nil and acl_node == jid_node) or acl_node == nil) and |
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171 ((acl_host ~= nil and acl_host == jid_host) or acl_host == nil) and |
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parents:
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|
172 ((acl_resource ~= nil and acl_resource == jid_resource) or acl_resource == nil) then |
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parents:
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|
173 allow = true; |
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|
174 end |
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|
175 end |
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Matthew Wild <mwild1@gmail.com>
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|
176 end |
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Matthew Wild <mwild1@gmail.com>
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|
177 else |
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Matthew Wild <mwild1@gmail.com>
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|
178 allow = true; |
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|
179 end |
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Matthew Wild <mwild1@gmail.com>
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|
180 if allow == true then |
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Matthew Wild <mwild1@gmail.com>
parents:
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181 if reply == nil then |
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182 reply = st.iq({type="result", from=host}) |
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183 :query("http://jabber.org/protocol/bytestreams") |
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184 :tag("streamhost", {jid=host, host=proxy_address, port=proxy_port}); |
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185 replies_cache.stream_host = reply; |
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|
186 end |
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187 else |
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parents:
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|
188 module:log("warn", "Denying use of proxy for %s", tostring(_jid_join(jid_node, jid_host, jid_resource))); |
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Matthew Wild <mwild1@gmail.com>
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189 if err_reply == nil then |
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parents:
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190 err_reply = st.iq({type="error", from=host}) |
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parents:
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|
191 :query("http://jabber.org/protocol/bytestreams") |
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|
192 :tag("error", {code='403', type='auth'}) |
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193 :tag("forbidden", {xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'}); |
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Matthew Wild <mwild1@gmail.com>
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194 replies_cache.stream_host_err = err_reply; |
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|
195 end |
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196 reply = err_reply; |
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197 end |
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|
198 reply.attr.id = stanza.attr.id; |
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199 reply.attr.to = stanza.attr.from; |
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200 reply.tags[1].attr.sid = sid; |
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|
201 return reply; |
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|
202 end |
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|
203 |
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Matthew Wild <mwild1@gmail.com>
parents:
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|
204 module.unload = function() |
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Matthew Wild <mwild1@gmail.com>
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|
205 componentmanager.deregister_component(host); |
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Matthew Wild <mwild1@gmail.com>
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|
206 connlisteners.deregister(module.host .. ':proxy65'); |
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parents:
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|
207 end |
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|
208 |
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Matthew Wild <mwild1@gmail.com>
parents:
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|
209 local function set_activation(stanza) |
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Matthew Wild <mwild1@gmail.com>
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|
210 local from, to, sid, reply = nil; |
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parents:
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|
211 from = stanza.attr.from; |
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parents:
diff
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|
212 if stanza.tags[1] ~= nil and tostring(stanza.tags[1].name) == "query" then |
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Matthew Wild <mwild1@gmail.com>
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|
213 if stanza.tags[1].attr ~= nil then |
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Matthew Wild <mwild1@gmail.com>
parents:
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|
214 sid = stanza.tags[1].attr.sid; |
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parents:
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|
215 end |
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diff
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|
216 if stanza.tags[1].tags[1] ~= nil and tostring(stanza.tags[1].tags[1].name) == "activate" then |
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Matthew Wild <mwild1@gmail.com>
parents:
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|
217 to = stanza.tags[1].tags[1][1]; |
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parents:
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|
218 end |
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Matthew Wild <mwild1@gmail.com>
parents:
diff
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|
219 end |
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Matthew Wild <mwild1@gmail.com>
parents:
diff
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|
220 if from ~= nil and to ~= nil and sid ~= nil then |
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Matthew Wild <mwild1@gmail.com>
parents:
diff
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|
221 reply = st.iq({type="result", from=host, to=from}); |
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|
222 reply.attr.id = stanza.attr.id; |
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|
223 end |
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parents:
diff
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|
224 return reply, from, to, sid; |
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Matthew Wild <mwild1@gmail.com>
parents:
diff
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|
225 end |
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parents:
diff
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|
226 |
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Matthew Wild <mwild1@gmail.com>
parents:
diff
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|
227 function handle_to_domain(origin, stanza) |
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Matthew Wild <mwild1@gmail.com>
parents:
diff
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|
228 local to_node, to_host, to_resource = jid_split(stanza.attr.to); |
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Matthew Wild <mwild1@gmail.com>
parents:
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229 if to_node == nil then |
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230 local type = stanza.attr.type; |
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231 if type == "error" or type == "result" then return; end |
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232 if stanza.name == "iq" and type == "get" then |
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233 local xmlns = stanza.tags[1].attr.xmlns |
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234 if xmlns == "http://jabber.org/protocol/disco#info" then |
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235 origin.send(get_disco_info(stanza)); |
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236 return true; |
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237 elseif xmlns == "http://jabber.org/protocol/disco#items" then |
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238 origin.send(get_disco_items(stanza)); |
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239 return true; |
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240 elseif xmlns == "http://jabber.org/protocol/bytestreams" then |
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241 origin.send(get_stream_host(origin, stanza)); |
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242 return true; |
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243 end |
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244 elseif stanza.name == "iq" and type == "set" then |
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245 local reply, from, to, sid = set_activation(stanza); |
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246 if reply ~= nil and from ~= nil and to ~= nil and sid ~= nil then |
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247 local sha = sha1(sid .. from .. to, true); |
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248 if transfers[sha] == nil then |
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249 module:log("error", "transfers[sha]: nil"); |
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250 elseif(transfers[sha] ~= nil and transfers[sha].initiator ~= nil and transfers[sha].target ~= nil) then |
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251 origin.send(reply); |
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252 transfers[sha].activated = true; |
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253 end |
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254 else |
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255 module:log("error", "activation failed: sid: %s, initiator: %s, target: %s", tostring(sid), tostring(from), tostring(to)); |
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256 end |
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257 end |
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258 end |
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259 return; |
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260 end |
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261 |
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262 if not connlisteners.register(module.host .. ':proxy65', connlistener) then |
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263 error("mod_proxy65: Could not establish a connection listener. Check your configuration please."); |
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264 error(" one possible cause for this would be that two proxy65 components share the same port."); |
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265 end |
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266 |
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267 connlisteners.start(module.host .. ':proxy65'); |
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268 component = componentmanager.register_component(host, handle_to_domain); |