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plugins/mod_component.lua @ 969:9ab6934fb1ff
mod_debug: Run on a different port, and use a different listener to mod_console
author | Matthew Wild <mwild1@gmail.com> |
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date | Wed, 08 Apr 2009 21:14:48 +0100 |
parent | 959:e3db909065f2 |
child | 979:d0fd49c4339c |
rev | line source |
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902
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1 -- Prosody IM v0.4 |
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2 -- Copyright (C) 2008-2009 Matthew Wild |
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3 -- Copyright (C) 2008-2009 Waqas Hussain |
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4 -- |
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5 -- This project is MIT/X11 licensed. Please see the |
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6 -- COPYING file in the source package for more information. |
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7 -- |
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8 |
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9 if module:get_host_type() ~= "component" then |
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10 error("Don't load mod_component manually, it should be for a component, please see http://prosody.im/doc/components", 0); |
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11 end |
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12 |
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13 local t_concat = table.concat; |
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14 |
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15 local connlisteners = require "net.connlisteners"; |
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16 local cm_register_component = require "core.componentmanager".register_component; |
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17 local uuid_gen = require "util.uuid".generate; |
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18 local sha1 = require "util.hashes".sha1; |
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19 local st = stanza; |
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20 local init_xmlhandlers = require "core.xmlhandlers"; |
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21 |
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22 local sessions = {}; |
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23 |
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24 local log = module._log; |
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25 |
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26 local component_listener = { default_port = 5347; default_mode = "*a"; default_interface = config.get("*", "core", "component_interface") or "127.0.0.1" }; |
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27 |
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28 local xmlns_component = 'jabber:component:accept'; |
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29 |
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30 --- Callbacks/data for xmlhandlers to handle streams for us --- |
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31 |
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32 local stream_callbacks = { stream_tag = "http://etherx.jabber.org/streams|stream", default_ns = xmlns_component }; |
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33 |
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34 function stream_callbacks.error(session, error, data, data2) |
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35 log("warn", "Error processing component stream: "..tostring(error)); |
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36 if error == "no-stream" then |
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37 session:close("invalid-namespace"); |
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38 elseif error == "xml-parse-error" and data == "unexpected-element-close" then |
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39 session.log("debug", "Unexpected close of '%s' tag", data2); |
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40 session:close("xml-not-well-formed"); |
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41 else |
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42 session.log("debug", "External component %s XML parse error: %s", tostring(session.host), tostring(error)); |
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43 print(data, debug.traceback()) |
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44 session:close("xml-not-well-formed"); |
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45 end |
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46 end |
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47 |
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48 function stream_callbacks.streamopened(session, attr) |
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49 if config.get(attr.to, "core", "component_module") ~= "component" then |
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50 -- Trying to act as a component domain which |
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51 -- hasn't been configured |
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52 session:close{ condition = "host-unknown", text = tostring(attr.to).." does not match any configured external components" }; |
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53 return; |
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54 end |
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55 |
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56 -- Store the original host (this is used for config, etc.) |
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57 session.user = attr.to; |
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58 -- Set the host for future reference |
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59 session.host = config.get(attr.to, "core", "component_address") or attr.to; |
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60 -- Note that we don't create the internal component |
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61 -- until after the external component auths successfully |
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62 |
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63 session.streamid = uuid_gen(); |
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64 session.notopen = nil; |
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65 |
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66 session.send(st.stanza("stream:stream", { xmlns=xmlns_component, |
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67 ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.host }):top_tag()); |
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68 |
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69 end |
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70 |
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71 function stream_callbacks.streamclosed(session) |
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72 session.send("</stream:stream>"); |
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73 session.notopen = true; |
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74 end |
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75 |
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76 local core_process_stanza = core_process_stanza; |
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77 |
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78 function stream_callbacks.handlestanza(session, stanza) |
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79 -- Namespaces are icky. |
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80 log("warn", "Handing stanza with name %s", stanza.name); |
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81 if stanza.name ~= "handshake" then |
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82 return core_process_stanza(session, stanza); |
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83 else |
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84 handle_component_auth(session, stanza); |
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85 end |
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86 end |
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87 |
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88 --- Handle authentication attempts by components |
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89 function handle_component_auth(session, stanza) |
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90 if (not session.host) or #stanza.tags > 0 then |
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91 session:close("not-authorized"); |
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92 return; |
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93 end |
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94 |
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95 local secret = config.get(session.user, "core", "component_secret"); |
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96 if not secret then |
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97 log("warn", "Component attempted to identify as %s, but component_password is not set", session.user); |
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98 session:close("not-authorized"); |
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99 return; |
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100 end |
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101 |
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102 local supplied_token = t_concat(stanza); |
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103 local calculated_token = sha1(session.streamid..secret, true); |
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104 if supplied_token:lower() ~= calculated_token:lower() then |
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105 session:close{ condition = "not-authorized", text = "Given token does not match calculated token" }; |
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106 return; |
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107 end |
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108 |
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109 |
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110 -- Authenticated now |
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111 |
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112 -- If component not already created for this host, create one now |
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113 if not hosts[session.host].connected then |
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114 local send = session.send; |
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115 session.component_session = cm_register_component(session.host, function (_, data) return send(data); end); |
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116 hosts[session.host].connected = true; |
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117 else |
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118 log("error", "Multiple components bound to the same address, first one wins (TODO: Implement stanza distribution)"); |
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119 end |
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120 |
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121 -- Signal successful authentication |
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122 session.send(st.stanza("handshake")); |
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123 end |
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124 |
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125 module:add_handler("component", "handshake", xmlns_component, handle_component_auth); |
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126 |
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127 --- Closing a component connection |
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128 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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129 local function session_close(session, reason) |
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130 local log = session.log or log; |
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131 if session.conn then |
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132 if reason then |
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133 if type(reason) == "string" then -- assume stream error |
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134 log("info", "Disconnecting component, <stream:error> is: %s", reason); |
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135 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); |
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136 elseif type(reason) == "table" then |
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137 if reason.condition then |
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138 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); |
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139 if reason.text then |
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140 stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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141 end |
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142 if reason.extra then |
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143 stanza:add_child(reason.extra); |
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144 end |
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145 log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza)); |
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146 session.send(stanza); |
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147 elseif reason.name then -- a stanza |
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148 log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason)); |
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149 session.send(reason); |
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150 end |
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151 end |
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152 end |
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153 session.send("</stream:stream>"); |
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154 session.conn.close(); |
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155 component_listener.disconnect(session.conn, "stream error"); |
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156 end |
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157 end |
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158 |
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159 --- Component connlistener |
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160 function component_listener.listener(conn, data) |
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161 local session = sessions[conn]; |
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162 if not session then |
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163 local _send = conn.write; |
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164 session = { type = "component", conn = conn, send = function (data) return _send(tostring(data)); end }; |
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165 sessions[conn] = session; |
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166 |
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167 -- Logging functions -- |
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168 |
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169 local conn_name = "xep114-"..tostring(conn):match("[a-f0-9]+$"); |
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170 session.log = logger.init(conn_name); |
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171 session.close = session_close; |
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172 |
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173 session.log("info", "Incoming XEP-0114 connection"); |
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174 |
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175 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|"); |
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176 session.parser = parser; |
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177 |
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178 session.notopen = true; |
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179 |
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180 function session.data(conn, data) |
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181 local ok, err = parser:parse(data); |
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182 if ok then return; end |
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183 session:close("xml-not-well-formed"); |
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184 end |
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185 |
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186 session.dispatch_stanza = stream_callbacks.handlestanza; |
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187 |
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188 end |
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189 if data then |
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190 session.data(conn, data); |
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191 end |
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192 end |
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193 |
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194 function component_listener.disconnect(conn, err) |
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195 local session = sessions[conn]; |
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196 if session then |
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197 (session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err)); |
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198 if session.host then |
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199 if session.component then |
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200 deregister_component(session.host); |
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201 end |
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202 end |
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203 sessions[conn] = nil; |
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204 session = nil; |
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205 collectgarbage("collect"); |
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206 end |
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207 end |
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208 |
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209 connlisteners.register('component', component_listener); |
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210 |
910
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211 module:add_event_hook("server-started", |
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212 function () |
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213 if net_activate_ports then |
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214 net_activate_ports("component_ports", "component", {5437}, "tcp"); |
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215 else |
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216 error("No net_activate_ports: Using an incompatible version of Prosody?"); |
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217 end |
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218 end); |