Tue, 21 Apr 2009 03:37:49 +0100
core.loggingmanager: A new manager (yay!) to manage log output
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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 cm_deregister_component = require "core.componentmanager".deregister_component; |
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18 | local uuid_gen = require "util.uuid".generate; |
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19 | local sha1 = require "util.hashes".sha1; |
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20 | local st = stanza; |
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21 | local init_xmlhandlers = require "core.xmlhandlers"; |
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22 | |
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23 | local sessions = {}; |
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24 | |
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25 | local log = module._log; |
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26 | |
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27 | 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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28 | |
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29 | local xmlns_component = 'jabber:component:accept'; |
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30 | |
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31 | --- Callbacks/data for xmlhandlers to handle streams for us --- |
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32 | |
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33 | local stream_callbacks = { stream_tag = "http://etherx.jabber.org/streams|stream", default_ns = xmlns_component }; |
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34 | |
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35 | function stream_callbacks.error(session, error, data, data2) |
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36 | log("warn", "Error processing component stream: "..tostring(error)); |
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37 | if error == "no-stream" then |
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38 | session:close("invalid-namespace"); |
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39 | elseif error == "xml-parse-error" and data == "unexpected-element-close" then |
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40 | session.log("debug", "Unexpected close of '%s' tag", data2); |
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41 | session:close("xml-not-well-formed"); |
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42 | else |
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43 | session.log("debug", "External component %s XML parse error: %s", tostring(session.host), tostring(error)); |
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44 | print(data, debug.traceback()) |
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45 | session:close("xml-not-well-formed"); |
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46 | end |
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47 | end |
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48 | |
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49 | function stream_callbacks.streamopened(session, attr) |
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50 | if config.get(attr.to, "core", "component_module") ~= "component" then |
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51 | -- Trying to act as a component domain which |
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52 | -- hasn't been configured |
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53 | session:close{ condition = "host-unknown", text = tostring(attr.to).." does not match any configured external components" }; |
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54 | return; |
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55 | end |
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56 | |
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57 | -- Store the original host (this is used for config, etc.) |
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58 | session.user = attr.to; |
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59 | -- Set the host for future reference |
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60 | session.host = config.get(attr.to, "core", "component_address") or attr.to; |
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61 | -- Note that we don't create the internal component |
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62 | -- until after the external component auths successfully |
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63 | |
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64 | session.streamid = uuid_gen(); |
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65 | session.notopen = nil; |
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66 | |
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67 | session.send(st.stanza("stream:stream", { xmlns=xmlns_component, |
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68 | ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.host }):top_tag()); |
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69 | |
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70 | end |
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71 | |
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72 | function stream_callbacks.streamclosed(session) |
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73 | session.send("</stream:stream>"); |
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74 | session.notopen = true; |
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75 | end |
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76 | |
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77 | local core_process_stanza = core_process_stanza; |
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78 | |
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79 | function stream_callbacks.handlestanza(session, stanza) |
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80 | -- Namespaces are icky. |
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81 | log("warn", "Handing stanza with name %s", stanza.name); |
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82 | if stanza.name ~= "handshake" then |
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83 | return core_process_stanza(session, stanza); |
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84 | else |
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85 | handle_component_auth(session, stanza); |
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86 | end |
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87 | end |
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88 | |
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89 | --- Handle authentication attempts by components |
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90 | function handle_component_auth(session, stanza) |
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91 | if (not session.host) or #stanza.tags > 0 then |
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92 | session:close("not-authorized"); |
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93 | return; |
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94 | end |
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95 | |
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96 | local secret = config.get(session.user, "core", "component_secret"); |
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97 | if not secret then |
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98 | log("warn", "Component attempted to identify as %s, but component_password is not set", session.user); |
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99 | session:close("not-authorized"); |
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100 | return; |
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101 | end |
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102 | |
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103 | local supplied_token = t_concat(stanza); |
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104 | local calculated_token = sha1(session.streamid..secret, true); |
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105 | if supplied_token:lower() ~= calculated_token:lower() then |
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106 | session:close{ condition = "not-authorized", text = "Given token does not match calculated token" }; |
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107 | return; |
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108 | end |
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109 | |
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110 | |
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111 | -- Authenticated now |
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112 | |
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113 | -- If component not already created for this host, create one now |
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114 | if not hosts[session.host].connected then |
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115 | local send = session.send; |
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116 | session.component_session = cm_register_component(session.host, function (_, data) return send(data); end); |
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117 | hosts[session.host].connected = true; |
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118 | else |
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119 | log("error", "Multiple components bound to the same address, first one wins (TODO: Implement stanza distribution)"); |
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120 | end |
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121 | |
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122 | -- Signal successful authentication |
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123 | session.send(st.stanza("handshake")); |
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124 | end |
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125 | |
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126 | module:add_handler("component", "handshake", xmlns_component, handle_component_auth); |
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127 | |
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128 | --- Closing a component connection |
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129 | local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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130 | local function session_close(session, reason) |
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131 | local log = session.log or log; |
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132 | if session.conn then |
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133 | if reason then |
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134 | if type(reason) == "string" then -- assume stream error |
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135 | log("info", "Disconnecting component, <stream:error> is: %s", reason); |
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136 | session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); |
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137 | elseif type(reason) == "table" then |
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138 | if reason.condition then |
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139 | local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); |
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140 | if reason.text then |
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141 | stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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142 | end |
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143 | if reason.extra then |
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144 | stanza:add_child(reason.extra); |
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145 | end |
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146 | log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza)); |
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147 | session.send(stanza); |
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148 | elseif reason.name then -- a stanza |
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149 | log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason)); |
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150 | session.send(reason); |
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151 | end |
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152 | end |
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153 | end |
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154 | session.send("</stream:stream>"); |
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155 | session.conn.close(); |
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156 | component_listener.disconnect(session.conn, "stream error"); |
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157 | end |
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158 | end |
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159 | |
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160 | --- Component connlistener |
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161 | function component_listener.listener(conn, data) |
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162 | local session = sessions[conn]; |
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163 | if not session then |
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164 | local _send = conn.write; |
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165 | session = { type = "component", conn = conn, send = function (data) return _send(tostring(data)); end }; |
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166 | sessions[conn] = session; |
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167 | |
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168 | -- Logging functions -- |
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169 | |
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170 | local conn_name = "xep114-"..tostring(conn):match("[a-f0-9]+$"); |
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171 | session.log = logger.init(conn_name); |
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172 | session.close = session_close; |
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173 | |
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174 | session.log("info", "Incoming XEP-0114 connection"); |
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175 | |
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176 | local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|"); |
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177 | session.parser = parser; |
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178 | |
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179 | session.notopen = true; |
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180 | |
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181 | function session.data(conn, data) |
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182 | local ok, err = parser:parse(data); |
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183 | if ok then return; end |
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184 | session:close("xml-not-well-formed"); |
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185 | end |
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186 | |
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187 | session.dispatch_stanza = stream_callbacks.handlestanza; |
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188 | |
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189 | end |
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190 | if data then |
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191 | session.data(conn, data); |
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192 | end |
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193 | end |
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194 | |
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195 | function component_listener.disconnect(conn, err) |
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196 | local session = sessions[conn]; |
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197 | if session then |
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198 | (session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err)); |
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199 | if session.host then |
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200 | log("debug", "deregistering component"); |
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201 | cm_deregister_component(session.host); |
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202 | hosts[session.host].connected = nil; |
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203 | end |
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204 | sessions[conn] = nil; |
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205 | session = nil; |
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206 | collectgarbage("collect"); |
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207 | end |
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208 | end |
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209 | |
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210 | connlisteners.register('component', component_listener); |
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211 | |
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212 | module:add_event_hook("server-started", |
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213 | function () |
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214 | if net_activate_ports then |
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215 | net_activate_ports("component", "component", {5437}, "tcp"); |
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216 | else |
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217 | error("No net_activate_ports: Using an incompatible version of Prosody?"); |
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218 | end |
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219 | end); |