prosody
1488fd9d3fa5
net/xmppserver_listener.lua

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net/xmppserver_listener.lua @ 3874:1488fd9d3fa5

net.xmppserver_listener: Removed unused variables and imports.
author Waqas Hussain <waqas20@gmail.com>
date Wed, 15 Dec 2010 03:53:44 +0500
parent 3873:9bc569083226
child 3755:0865524c741d
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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 lxp = require "lxp"
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19 local st = require "util.stanza";
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20 local connlisteners_register = require "net.connlisteners".register;
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21 local new_xmpp_stream = require "util.xmppstream".new;
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22 local s2s_new_incoming = require "core.s2smanager".new_incoming;
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23 local s2s_streamopened = require "core.s2smanager".streamopened;
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24 local s2s_streamclosed = require "core.s2smanager".streamclosed;
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25 local s2s_destroy_session = require "core.s2smanager".destroy_session;
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26 local s2s_attempt_connect = require "core.s2smanager".attempt_connection;
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27 local stream_callbacks = { default_ns = "jabber:server",
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28 streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza };
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30 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
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31
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32 function stream_callbacks.error(session, error, data)
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33 if error == "no-stream" then
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34 session:close("invalid-namespace");
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35 elseif error == "parse-error" then
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36 session.log("debug", "Server-to-server XML parse error: %s", tostring(error));
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37 session:close("not-well-formed");
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38 elseif error == "stream-error" then
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39 local condition, text = "undefined-condition";
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40 for child in data:children() do
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41 if child.attr.xmlns == xmlns_xmpp_streams then
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42 if child.name ~= "text" then
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43 condition = child.name;
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44 else
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45 text = child:get_text();
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46 end
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47 if condition ~= "undefined-condition" and text then
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48 break;
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49 end
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50 end
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51 end
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52 text = condition .. (text and (" ("..text..")") or "");
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53 session.log("info", "Session closed by remote with error: %s", text);
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54 session:close(nil, text);
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55 end
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56 end
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57
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58 local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), traceback()); end
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59 function stream_callbacks.handlestanza(session, stanza)
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60 if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client
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61 stanza.attr.xmlns = nil;
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62 end
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63 stanza = session.filter("stanzas/in", stanza);
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64 if stanza then
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65 return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
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66 end
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67 end
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68
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69 local sessions = {};
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70 local xmppserver = { default_port = 5269, default_mode = "*a" };
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71
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72 -- These are session methods --
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73
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74 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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75 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
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76 local function session_close(session, reason, remote_reason)
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77 local log = session.log or log;
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78 if session.conn then
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79 if session.notopen then
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80 session.sends2s("<?xml version='1.0'?>");
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81 session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
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82 end
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83 if reason then
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84 if type(reason) == "string" then -- assume stream error
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85 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason);
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86 session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
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87 elseif type(reason) == "table" then
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88 if reason.condition then
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89 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
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90 if reason.text then
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91 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
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92 end
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93 if reason.extra then
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94 stanza:add_child(reason.extra);
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95 end
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96 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza));
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97 session.sends2s(stanza);
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98 elseif reason.name then -- a stanza
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99 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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100 session.sends2s(reason);
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101 end
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102 end
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103 end
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104 session.sends2s("</stream:stream>");
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105 if session.notopen or not session.conn:close() then
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106 session.conn:close(true); -- Force FIXME: timer?
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107 end
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108 session.conn:close();
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109 xmppserver.ondisconnect(session.conn, remote_reason or (reason and (reason.text or reason.condition)) or reason or "stream closed");
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110 end
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111 end
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112
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113
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114 -- End of session methods --
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115
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116 local function initialize_session(session)
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117 local stream = new_xmpp_stream(session, stream_callbacks);
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118 session.stream = stream;
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119
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120 session.notopen = true;
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121
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122 function session.reset_stream()
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123 session.notopen = true;
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124 session.stream:reset();
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125 end
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126
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127 local filter = session.filter;
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128 function session.data(data)
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129 data = filter("bytes/in", data);
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130 if data then
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131 local ok, err = stream:feed(data);
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132 if ok then return; end
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133 (session.log or log)("warn", "Received invalid XML: %s", data);
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134 (session.log or log)("warn", "Problem was: %s", err);
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135 session:close("not-well-formed");
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136 end
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137 end
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138
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139 session.close = session_close;
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140 local handlestanza = stream_callbacks.handlestanza;
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141 function session.dispatch_stanza(session, stanza)
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142 return handlestanza(session, stanza);
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143 end
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144 end
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145
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146 function xmppserver.onconnect(conn)
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147 if not sessions[conn] then -- May be an existing outgoing session
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148 local session = s2s_new_incoming(conn);
148
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149 sessions[conn] = session;
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150
148
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151 -- Logging functions --
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152 local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$");
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153 session.log = logger.init(conn_name);
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154
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155 session.log("info", "Incoming s2s connection");
148
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156
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157 initialize_session(session);
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158 end
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159 end
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160
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161 function xmppserver.onincoming(conn, data)
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162 local session = sessions[conn];
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163 if session then
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164 session.data(data);
148
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165 end
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166 end
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167
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168 function xmppserver.onstatus(conn, status)
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169 if status == "ssl-handshake-complete" then
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170 local session = sessions[conn];
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171 if session and session.direction == "outgoing" then
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172 local to_host, from_host = session.to_host, session.from_host;
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173 session.log("debug", "Sending stream header...");
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174 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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175 end
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176 end
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177 end
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178
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179 function xmppserver.ondisconnect(conn, err)
163
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180 local session = sessions[conn];
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181 if session then
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182 if err and err ~= "closed" and session.srv_hosts then
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183 (session.log or log)("debug", "s2s connection attempt failed: %s", err);
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184 if s2s_attempt_connect(session, err) then
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185 (session.log or log)("debug", "...so we're going to try another target");
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186 return; -- Session lives for now
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187 end
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188 end
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189 (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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190 s2s_destroy_session(session, err);
163
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191 sessions[conn] = nil;
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192 session = nil;
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193 end
148
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194 end
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195
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196 function xmppserver.register_outgoing(conn, session)
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197 session.direction = "outgoing";
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198 sessions[conn] = session;
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199
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200 initialize_session(session);
148
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201 end
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202
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203 connlisteners_register("xmppserver", xmppserver);
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204
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205
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206 -- We need to perform some initialisation when a connection is created
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207 -- We also need to perform that same initialisation at other points (SASL, TLS, ...)
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208
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209 -- ...and we need to handle data
226
ba4711c4e8d2 Committing code to get nicer tracebacks for errors, also we no longer consider such errors fatal (probably a bad thing, I know...)
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210 -- ...and record all sessions associated with connections