Software / code / prosody
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net/xmppserver_listener.lua @ 2740:2442c54cf9ec
net.server_select: Fix for traceback when a read returns an error and no data (thanks dersd)
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Fri, 05 Mar 2010 16:45:46 +0000 |
| parent | 2560:56063f825199 |
| child | 2745:5cedad1bcb28 |
| rev | line source |
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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 -- |
| 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" |
| 14 local init_xmlhandlers = require "core.xmlhandlers" | |
| 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("xml-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(a, b) |
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53 xpcall(function () core_process_stanza(a, b) end, handleerr); |
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54 end |
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55 |
| 148 | 56 local connlisteners_register = require "net.connlisteners".register; |
| 57 | |
| 58 local t_insert = table.insert; | |
| 59 local t_concat = table.concat; | |
| 60 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 | |
| 61 local m_random = math.random; | |
| 62 local format = string.format; | |
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63 local sessionmanager = require "core.sessionmanager"; |
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64 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; |
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65 local st = require "util.stanza"; |
| 148 | 66 |
| 67 local sessions = {}; | |
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68 local xmppserver = { default_port = 5269, default_mode = "*a" }; |
| 148 | 69 |
| 70 -- These are session methods -- | |
| 71 | |
| 72 local function session_reset_stream(session) | |
| 73 -- Reset stream | |
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74 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "\1"); |
| 148 | 75 session.parser = parser; |
| 76 | |
| 77 session.notopen = true; | |
| 78 | |
| 79 function session.data(conn, data) | |
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80 local ok, err = parser:parse(data); |
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81 if ok then return; end |
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82 (session.log or log)("warn", "Received invalid XML: %s", data); |
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83 (session.log or log)("warn", "Problem was: %s", err); |
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84 session:close("xml-not-well-formed"); |
| 148 | 85 end |
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86 |
| 148 | 87 return true; |
| 88 end | |
| 89 | |
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90 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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91 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" }; |
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92 local function session_close(session, reason, remote_reason) |
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93 local log = session.log or log; |
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94 if session.conn then |
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95 if session.notopen then |
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96 session.sends2s("<?xml version='1.0'?>"); |
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97 session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag()); |
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98 end |
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99 if reason then |
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100 if type(reason) == "string" then -- assume stream error |
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101 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason); |
| 331 | 102 session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); |
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103 elseif type(reason) == "table" then |
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104 if reason.condition then |
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105 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); |
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106 if reason.text then |
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107 stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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108 end |
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109 if reason.extra then |
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110 stanza:add_child(reason.extra); |
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111 end |
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112 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza)); |
| 331 | 113 session.sends2s(stanza); |
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114 elseif reason.name then -- a stanza |
| 331 | 115 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)); |
| 116 session.sends2s(reason); | |
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117 end |
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118 end |
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119 end |
| 331 | 120 session.sends2s("</stream:stream>"); |
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121 if session.notopen or not session.conn:close() then |
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122 session.conn:close(true); -- Force FIXME: timer? |
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123 end |
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124 session.conn:close(); |
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125 xmppserver.ondisconnect(session.conn, remote_reason or (reason and (reason.text or reason.condition)) or reason or "stream closed"); |
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126 end |
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127 end |
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128 |
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129 |
| 148 | 130 -- End of session methods -- |
| 131 | |
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132 function xmppserver.onincoming(conn, data) |
| 148 | 133 local session = sessions[conn]; |
| 134 if not session then | |
| 135 session = s2s_new_incoming(conn); | |
| 136 sessions[conn] = session; | |
| 137 | |
| 138 -- Logging functions -- | |
| 139 | |
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140 |
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141 local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$"); |
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142 session.log = logger.init(conn_name); |
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143 |
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144 session.log("info", "Incoming s2s connection"); |
| 148 | 145 |
| 146 session.reset_stream = session_reset_stream; | |
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147 session.close = session_close; |
| 148 | 148 |
| 149 session_reset_stream(session); -- Initialise, ready for use | |
| 150 | |
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151 session.dispatch_stanza = stream_callbacks.handlestanza; |
| 148 | 152 end |
| 153 if data then | |
| 154 session.data(conn, data); | |
| 155 end | |
| 156 end | |
| 157 | |
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158 function xmppserver.onstatus(conn, status) |
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159 if status == "ssl-handshake-complete" then |
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160 local session = sessions[conn]; |
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161 if session and session.direction == "outgoing" then |
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162 local format, to_host, from_host = string.format, session.to_host, session.from_host; |
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163 session.log("debug", "Sending stream header..."); |
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164 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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165 end |
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166 end |
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167 end |
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168 |
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169 function xmppserver.ondisconnect(conn, err) |
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163
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170 local session = sessions[conn]; |
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171 if session then |
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172 if err and err ~= "closed" and session.srv_hosts then |
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173 (session.log or log)("debug", "s2s connection attempt failed: %s", err); |
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174 if s2s_attempt_connect(session, err) then |
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175 (session.log or log)("debug", "...so we're going to try another target"); |
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176 return; -- Session lives for now |
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177 end |
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178 end |
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179 (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err)); |
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180 s2s_destroy_session(session, err); |
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181 sessions[conn] = nil; |
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182 session = nil; |
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183 end |
| 148 | 184 end |
| 185 | |
| 186 function xmppserver.register_outgoing(conn, session) | |
| 187 session.direction = "outgoing"; | |
| 188 sessions[conn] = session; | |
| 189 | |
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190 session.reset_stream = session_reset_stream; |
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191 session.close = session_close; |
| 148 | 192 session_reset_stream(session); -- Initialise, ready for use |
| 193 | |
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194 --local function handleerr(err) print("Traceback:", err, debug.traceback()); end |
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195 --session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end |
| 148 | 196 end |
| 197 | |
| 198 connlisteners_register("xmppserver", xmppserver); | |
| 199 | |
| 200 | |
| 201 -- We need to perform some initialisation when a connection is created | |
| 202 -- We also need to perform that same initialisation at other points (SASL, TLS, ...) | |
| 203 | |
| 204 -- ...and we need to handle data | |
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205 -- ...and record all sessions associated with connections |
