Thu, 02 Dec 2010 22:55:42 +0500
net.server_select: Made some globals local.
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1 | -- Prosody IM |
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2 | -- Copyright (C) 2008-2010 Matthew Wild |
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3 | -- Copyright (C) 2008-2010 Waqas Hussain |
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4 | -- |
758 | 5 | -- This project is MIT/X11 licensed. Please see the |
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 | |
148 | 10 | |
11 | local logger = require "logger"; | |
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12 | local log = logger.init("xmppserver_listener"); |
148 | 13 | local lxp = require "lxp" |
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14 | local new_xmpp_stream = require "util.xmppstream".new; |
148 | 15 | local s2s_new_incoming = require "core.s2smanager".new_incoming; |
16 | local s2s_streamopened = require "core.s2smanager".streamopened; | |
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17 | local s2s_streamclosed = require "core.s2smanager".streamclosed; |
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18 | local s2s_destroy_session = require "core.s2smanager".destroy_session; |
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19 | local s2s_attempt_connect = require "core.s2smanager".attempt_connection; |
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20 | local stream_callbacks = { default_ns = "jabber:server", |
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21 | streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza }; |
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22 | |
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23 | local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams"; |
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24 | |
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25 | function stream_callbacks.error(session, error, data) |
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26 | if error == "no-stream" then |
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27 | session:close("invalid-namespace"); |
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28 | elseif error == "parse-error" then |
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29 | session.log("debug", "Server-to-server XML parse error: %s", tostring(error)); |
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30 | session:close("not-well-formed"); |
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31 | elseif error == "stream-error" then |
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32 | local condition, text = "undefined-condition"; |
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33 | for child in data:children() do |
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34 | if child.attr.xmlns == xmlns_xmpp_streams then |
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35 | if child.name ~= "text" then |
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36 | condition = child.name; |
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37 | else |
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38 | text = child:get_text(); |
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39 | end |
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40 | if condition ~= "undefined-condition" and text then |
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41 | break; |
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42 | end |
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43 | end |
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44 | end |
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45 | text = condition .. (text and (" ("..text..")") or ""); |
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46 | session.log("info", "Session closed by remote with error: %s", text); |
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47 | session:close(nil, text); |
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48 | end |
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49 | end |
331 | 50 | |
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51 | local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), debug.traceback()); end |
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52 | function stream_callbacks.handlestanza(session, stanza) |
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53 | if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client |
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54 | stanza.attr.xmlns = nil; |
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55 | end |
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56 | stanza = session.filter("stanzas/in", stanza); |
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57 | if stanza then |
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58 | return xpcall(function () return core_process_stanza(session, stanza) end, handleerr); |
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59 | end |
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60 | end |
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61 | |
148 | 62 | local connlisteners_register = require "net.connlisteners".register; |
63 | ||
64 | local t_insert = table.insert; | |
65 | local t_concat = table.concat; | |
66 | local t_concatall = function (t, sep) local tt = {}; for _, s in ipairs(t) do t_insert(tt, tostring(s)); end return t_concat(tt, sep); end | |
67 | local m_random = math.random; | |
68 | local format = string.format; | |
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69 | local sessionmanager = require "core.sessionmanager"; |
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70 | local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; |
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71 | local st = require "util.stanza"; |
148 | 72 | |
73 | local sessions = {}; | |
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74 | local xmppserver = { default_port = 5269, default_mode = "*a" }; |
148 | 75 | |
76 | -- These are session methods -- | |
77 | ||
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78 | local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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79 | local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" }; |
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80 | local function session_close(session, reason, remote_reason) |
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81 | local log = session.log or log; |
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82 | if session.conn then |
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83 | if session.notopen then |
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84 | session.sends2s("<?xml version='1.0'?>"); |
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85 | session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag()); |
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86 | end |
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87 | if reason then |
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88 | if type(reason) == "string" then -- assume stream error |
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89 | log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason); |
331 | 90 | session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); |
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91 | elseif type(reason) == "table" then |
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92 | if reason.condition then |
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93 | local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); |
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94 | if reason.text then |
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95 | stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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96 | end |
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97 | if reason.extra then |
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98 | stanza:add_child(reason.extra); |
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99 | end |
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100 | log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza)); |
331 | 101 | session.sends2s(stanza); |
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102 | elseif reason.name then -- a stanza |
331 | 103 | log("info", "Disconnecting %s->%s[%s], <stream:error> is: %s", session.from_host or "(unknown host)", session.to_host or "(unknown host)", session.type, tostring(reason)); |
104 | session.sends2s(reason); | |
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105 | end |
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106 | end |
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107 | end |
331 | 108 | session.sends2s("</stream:stream>"); |
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109 | if session.notopen or not session.conn:close() then |
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110 | session.conn:close(true); -- Force FIXME: timer? |
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111 | end |
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112 | session.conn:close(); |
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113 | xmppserver.ondisconnect(session.conn, remote_reason or (reason and (reason.text or reason.condition)) or reason or "stream closed"); |
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114 | end |
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115 | end |
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116 | |
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117 | |
148 | 118 | -- End of session methods -- |
119 | ||
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120 | local function initialize_session(session) |
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121 | local stream = new_xmpp_stream(session, stream_callbacks); |
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122 | session.stream = stream; |
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123 | |
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124 | session.notopen = true; |
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125 | |
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126 | function session.reset_stream() |
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127 | session.notopen = true; |
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128 | session.stream:reset(); |
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129 | end |
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130 | |
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131 | local filter = session.filter; |
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132 | function session.data(data) |
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133 | data = filter("bytes/in", data); |
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134 | if data then |
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135 | local ok, err = stream:feed(data); |
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136 | if ok then return; end |
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137 | (session.log or log)("warn", "Received invalid XML: %s", data); |
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138 | (session.log or log)("warn", "Problem was: %s", err); |
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139 | session:close("not-well-formed"); |
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140 | end |
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141 | end |
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142 | |
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143 | session.close = session_close; |
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144 | local handlestanza = stream_callbacks.handlestanza; |
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145 | function session.dispatch_stanza(session, stanza) |
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146 | return handlestanza(session, stanza); |
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147 | end |
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148 | end |
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149 | |
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150 | function xmppserver.onconnect(conn) |
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151 | if not sessions[conn] then -- May be an existing outgoing session |
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152 | local session = s2s_new_incoming(conn); |
148 | 153 | sessions[conn] = session; |
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154 | |
148 | 155 | -- Logging functions -- |
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156 | local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$"); |
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157 | session.log = logger.init(conn_name); |
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158 | |
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159 | session.log("info", "Incoming s2s connection"); |
148 | 160 | |
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161 | initialize_session(session); |
148 | 162 | end |
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163 | end |
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164 | |
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165 | function xmppserver.onincoming(conn, data) |
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166 | local session = sessions[conn]; |
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167 | if session then |
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168 | session.data(data); |
148 | 169 | end |
170 | end | |
171 | ||
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172 | function xmppserver.onstatus(conn, status) |
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173 | if status == "ssl-handshake-complete" then |
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174 | local session = sessions[conn]; |
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175 | if session and session.direction == "outgoing" then |
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176 | local format, to_host, from_host = string.format, session.to_host, session.from_host; |
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177 | session.log("debug", "Sending stream header..."); |
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178 | session.sends2s(format([[<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' from='%s' to='%s' version='1.0'>]], from_host, to_host)); |
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179 | end |
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180 | end |
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181 | end |
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182 | |
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183 | function xmppserver.ondisconnect(conn, err) |
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184 | local session = sessions[conn]; |
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185 | if session then |
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186 | if err and err ~= "closed" and session.srv_hosts then |
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187 | (session.log or log)("debug", "s2s connection attempt failed: %s", err); |
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188 | if s2s_attempt_connect(session, err) then |
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189 | (session.log or log)("debug", "...so we're going to try another target"); |
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190 | return; -- Session lives for now |
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191 | end |
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192 | end |
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193 | (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err or "closed")); |
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194 | s2s_destroy_session(session, err); |
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195 | sessions[conn] = nil; |
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196 | session = nil; |
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197 | end |
148 | 198 | end |
199 | ||
200 | function xmppserver.register_outgoing(conn, session) | |
201 | session.direction = "outgoing"; | |
202 | sessions[conn] = session; | |
203 | ||
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204 | initialize_session(session); |
148 | 205 | end |
206 | ||
207 | connlisteners_register("xmppserver", xmppserver); | |
208 | ||
209 | ||
210 | -- We need to perform some initialisation when a connection is created | |
211 | -- We also need to perform that same initialisation at other points (SASL, TLS, ...) | |
212 | ||
213 | -- ...and we need to handle data | |
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214 | -- ...and record all sessions associated with connections |