prosody
1e82c9b9db11
net/xmppserver_listener.lua

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net/xmppserver_listener.lua @ 3907:1e82c9b9db11

prosody.cfg.lua.dist: Add note about external gateways
author Matthew Wild <mwild1@gmail.com>
date Tue, 21 Dec 2010 01:47:49 +0000
parent 3755:0865524c741d
child 4421:971a66627f7a
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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 --
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b1885732e979 GPL->MIT!
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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 tostring = tostring;
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11 local type = type;
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12 local xpcall = xpcall;
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13 local s_format = string.format;
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14 local traceback = debug.traceback;
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15
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16 local logger = require "logger";
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17 local log = logger.init("xmppserver_listener");
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18 local st = require "util.stanza";
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19 local connlisteners_register = require "net.connlisteners".register;
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20 local new_xmpp_stream = require "util.xmppstream".new;
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21 local s2s_new_incoming = require "core.s2smanager".new_incoming;
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22 local s2s_streamopened = require "core.s2smanager".streamopened;
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23 local s2s_streamclosed = require "core.s2smanager".streamclosed;
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24 local s2s_destroy_session = require "core.s2smanager".destroy_session;
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25 local s2s_attempt_connect = require "core.s2smanager".attempt_connection;
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26 local stream_callbacks = { default_ns = "jabber:server",
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27 streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza };
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29 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
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30
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31 function stream_callbacks.error(session, error, data)
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32 if error == "no-stream" then
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33 session:close("invalid-namespace");
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34 elseif error == "parse-error" then
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35 session.log("debug", "Server-to-server XML parse error: %s", tostring(error));
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36 session:close("not-well-formed");
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37 elseif error == "stream-error" then
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38 local condition, text = "undefined-condition";
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39 for child in data:children() do
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40 if child.attr.xmlns == xmlns_xmpp_streams then
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41 if child.name ~= "text" then
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42 condition = child.name;
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43 else
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44 text = child:get_text();
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45 end
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46 if condition ~= "undefined-condition" and text then
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47 break;
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48 end
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49 end
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50 end
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51 text = condition .. (text and (" ("..text..")") or "");
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52 session.log("info", "Session closed by remote with error: %s", text);
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53 session:close(nil, text);
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54 end
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55 end
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56
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57 local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), traceback()); end
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58 function stream_callbacks.handlestanza(session, stanza)
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59 if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client
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60 stanza.attr.xmlns = nil;
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61 end
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62 stanza = session.filter("stanzas/in", stanza);
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63 if stanza then
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64 return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
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65 end
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66 end
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67
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68 local sessions = {};
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69 local xmppserver = { default_port = 5269, default_mode = "*a" };
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70
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71 -- These are session methods --
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72
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73 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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74 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
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75 local function session_close(session, reason, remote_reason)
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76 local log = session.log or log;
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77 if session.conn then
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78 if session.notopen then
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79 session.sends2s("<?xml version='1.0'?>");
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80 session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
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81 end
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82 if reason then
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83 if type(reason) == "string" then -- assume stream error
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84 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason);
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85 session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
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86 elseif type(reason) == "table" then
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87 if reason.condition then
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88 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
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89 if reason.text then
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90 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
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91 end
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92 if reason.extra then
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93 stanza:add_child(reason.extra);
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94 end
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95 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza));
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96 session.sends2s(stanza);
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97 elseif reason.name then -- a stanza
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98 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));
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99 session.sends2s(reason);
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100 end
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101 end
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102 end
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103 session.sends2s("</stream:stream>");
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104 if session.notopen or not session.conn:close() then
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105 session.conn:close(true); -- Force FIXME: timer?
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106 end
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107 session.conn:close();
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108 xmppserver.ondisconnect(session.conn, remote_reason or (reason and (reason.text or reason.condition)) or reason or "stream closed");
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109 end
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110 end
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111
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112
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113 -- End of session methods --
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114
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115 local function initialize_session(session)
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116 local stream = new_xmpp_stream(session, stream_callbacks);
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117 session.stream = stream;
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118
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119 session.notopen = true;
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120
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121 function session.reset_stream()
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122 session.notopen = true;
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123 session.stream:reset();
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124 end
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125
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126 local filter = session.filter;
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127 function session.data(data)
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128 data = filter("bytes/in", data);
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129 if data then
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130 local ok, err = stream:feed(data);
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131 if ok then return; end
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132 (session.log or log)("warn", "Received invalid XML: %s", data);
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133 (session.log or log)("warn", "Problem was: %s", err);
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134 session:close("not-well-formed");
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135 end
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136 end
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137
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138 session.close = session_close;
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139 local handlestanza = stream_callbacks.handlestanza;
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140 function session.dispatch_stanza(session, stanza)
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141 return handlestanza(session, stanza);
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142 end
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143 end
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144
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145 function xmppserver.onconnect(conn)
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146 if not sessions[conn] then -- May be an existing outgoing session
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147 local session = s2s_new_incoming(conn);
148
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148 sessions[conn] = session;
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149
148
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150 -- Logging functions --
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151 local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$");
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152 session.log = logger.init(conn_name);
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153
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154 session.log("info", "Incoming s2s connection");
148
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155
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156 initialize_session(session);
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157 end
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158 end
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159
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160 function xmppserver.onincoming(conn, data)
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161 local session = sessions[conn];
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162 if session then
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163 session.data(data);
148
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164 end
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165 end
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166
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167 function xmppserver.onstatus(conn, status)
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168 if status == "ssl-handshake-complete" then
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169 local session = sessions[conn];
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170 if session and session.direction == "outgoing" then
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171 local to_host, from_host = session.to_host, session.from_host;
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172 session.log("debug", "Sending stream header...");
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173 session.sends2s(s_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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174 end
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175 end
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176 end
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177
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178 function xmppserver.ondisconnect(conn, err)
163
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179 local session = sessions[conn];
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180 if session then
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181 if err and err ~= "closed" and session.srv_hosts then
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182 (session.log or log)("debug", "s2s connection attempt failed: %s", err);
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183 if s2s_attempt_connect(session, err) then
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184 (session.log or log)("debug", "...so we're going to try another target");
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185 return; -- Session lives for now
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186 end
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187 end
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188 (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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189 s2s_destroy_session(session, err);
163
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190 sessions[conn] = nil;
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191 session = nil;
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192 end
148
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193 end
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194
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195 function xmppserver.register_outgoing(conn, session)
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196 session.direction = "outgoing";
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197 sessions[conn] = session;
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198
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199 initialize_session(session);
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200 end
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201
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202 connlisteners_register("xmppserver", xmppserver);
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203
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204
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205 -- We need to perform some initialisation when a connection is created
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206 -- We also need to perform that same initialisation at other points (SASL, TLS, ...)
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207
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208 -- ...and we need to handle data
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209 -- ...and record all sessions associated with connections