prosody
f56670ce64de
net/xmppcomponent_listener.lua

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net/xmppcomponent_listener.lua @ 1959:f56670ce64de

util.helpers: Add get_upvalue(function, name) helper
author Matthew Wild <mwild1@gmail.com>
date Fri, 16 Oct 2009 22:03:32 +0100
parent 1635:33d087466767
child 2077:e33658f6052c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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841d61be198f Remove version number from copyright headers
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1 -- Prosody IM
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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
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10 local hosts = _G.hosts;
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11
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12 local t_concat = table.concat;
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13
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14 local lxp = require "lxp";
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15 local logger = require "util.logger";
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16 local config = require "core.configmanager";
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17 local connlisteners = require "net.connlisteners";
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18 local cm_register_component = require "core.componentmanager".register_component;
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19 local cm_deregister_component = require "core.componentmanager".deregister_component;
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20 local uuid_gen = require "util.uuid".generate;
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21 local sha1 = require "util.hashes".sha1;
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22 local st = require "util.stanza";
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23 local init_xmlhandlers = require "core.xmlhandlers";
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24
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25 local sessions = {};
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26
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27 local log = logger.init("componentlistener");
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28
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29 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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30
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31 local xmlns_component = 'jabber:component:accept';
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32
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33 --- Callbacks/data for xmlhandlers to handle streams for us ---
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34
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35 local stream_callbacks = { stream_tag = "http://etherx.jabber.org/streams|stream", default_ns = xmlns_component };
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36
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37 function stream_callbacks.error(session, error, data, data2)
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38 log("warn", "Error processing component stream: "..tostring(error));
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39 if error == "no-stream" then
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40 session:close("invalid-namespace");
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41 elseif error == "xml-parse-error" and data == "unexpected-element-close" then
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42 session.log("warn", "Unexpected close of '%s' tag", data2);
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43 session:close("xml-not-well-formed");
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44 else
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45 session.log("warn", "External component %s XML parse error: %s", tostring(session.host), tostring(error));
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46 session:close("xml-not-well-formed");
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47 end
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48 end
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49
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50 function stream_callbacks.streamopened(session, attr)
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51 if config.get(attr.to, "core", "component_module") ~= "component" then
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52 -- Trying to act as a component domain which
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53 -- hasn't been configured
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54 session:close{ condition = "host-unknown", text = tostring(attr.to).." does not match any configured external components" };
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55 return;
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56 end
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57
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58 -- Store the original host (this is used for config, etc.)
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59 session.user = attr.to;
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60 -- Set the host for future reference
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61 session.host = config.get(attr.to, "core", "component_address") or attr.to;
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62 -- Note that we don't create the internal component
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63 -- until after the external component auths successfully
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64
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65 session.streamid = uuid_gen();
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66 session.notopen = nil;
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67
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68 session.send(st.stanza("stream:stream", { xmlns=xmlns_component,
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69 ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.host }):top_tag());
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70
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71 end
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72
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73 function stream_callbacks.streamclosed(session)
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74 session.send("</stream:stream>");
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75 session.notopen = true;
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76 end
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77
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78 local core_process_stanza = core_process_stanza;
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79
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80 function stream_callbacks.handlestanza(session, stanza)
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81 -- Namespaces are icky.
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82 if not stanza.attr.xmlns and stanza.name == "handshake" then
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83 stanza.attr.xmlns = xmlns_component;
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84 end
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85 return core_process_stanza(session, stanza);
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86 end
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87
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88 --- Closing a component connection
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89 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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90 local default_stream_attr = { ["xmlns:stream"] = stream_callbacks.stream_tag:gsub("%|[^|]+$", ""), xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
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91 local function session_close(session, reason)
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92 local log = session.log or log;
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93 if session.conn then
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94 if session.notopen then
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95 session.send("<?xml version='1.0'?>");
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96 session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
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97 end
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98 if reason then
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99 if type(reason) == "string" then -- assume stream error
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100 log("info", "Disconnecting component, <stream:error> is: %s", reason);
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101 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
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102 elseif type(reason) == "table" then
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103 if reason.condition then
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104 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
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105 if reason.text then
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106 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
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107 end
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108 if reason.extra then
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109 stanza:add_child(reason.extra);
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110 end
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111 log("info", "Disconnecting component, <stream:error> is: %s", tostring(stanza));
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112 session.send(stanza);
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113 elseif reason.name then -- a stanza
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114 log("info", "Disconnecting component, <stream:error> is: %s", tostring(reason));
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115 session.send(reason);
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116 end
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117 end
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118 end
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119 session.send("</stream:stream>");
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120 session.conn.close();
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121 component_listener.disconnect(session.conn, "stream error");
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122 end
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123 end
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124
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125 --- Component connlistener
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126 function component_listener.listener(conn, data)
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127 local session = sessions[conn];
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128 if not session then
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129 local _send = conn.write;
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130 session = { type = "component", conn = conn, send = function (data) return _send(tostring(data)); end };
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131 sessions[conn] = session;
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132
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133 -- Logging functions --
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134
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135 local conn_name = "jcp"..tostring(conn):match("[a-f0-9]+$");
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136 session.log = logger.init(conn_name);
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137 session.close = session_close;
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138
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139 session.log("info", "Incoming Jabber component connection");
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140
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141 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
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142 session.parser = parser;
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143
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144 session.notopen = true;
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145
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146 function session.data(conn, data)
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147 local ok, err = parser:parse(data);
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148 if ok then return; end
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149 session:close("xml-not-well-formed");
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150 end
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151
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152 session.dispatch_stanza = stream_callbacks.handlestanza;
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153
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154 end
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155 if data then
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156 session.data(conn, data);
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157 end
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158 end
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159
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160 function component_listener.disconnect(conn, err)
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161 local session = sessions[conn];
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162 if session then
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163 (session.log or log)("info", "component disconnected: %s (%s)", tostring(session.host), tostring(err));
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164 if session.host then
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165 log("debug", "Deregistering component");
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166 cm_deregister_component(session.host);
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167 hosts[session.host].connected = nil;
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168 end
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169 sessions[conn] = nil;
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170 for k in pairs(session) do session[k] = nil; end
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171 session = nil;
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172 collectgarbage("collect");
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173 end
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174 end
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175
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176 connlisteners.register('xmppcomponent', component_listener);