Annotate

net/xmppserver_listener.lua @ 1626:7f17d0d00fbb

Fixed: Self-references could be added to rosters via presence subscriptions
author Waqas Hussain <waqas20@gmail.com>
date Mon, 03 Aug 2009 21:48:51 +0500
parent 1617:c6e175a0d83b
child 1618:ba2a92230b77
child 1951:632039101699
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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
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11 local logger = require "logger";
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12 local log = logger.init("xmppserver_listener");
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13 local lxp = require "lxp"
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14 local init_xmlhandlers = require "core.xmlhandlers"
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15 local s2s_new_incoming = require "core.s2smanager".new_incoming;
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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 = { stream_tag = "http://etherx.jabber.org/streams|stream",
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21 default_ns = "jabber:server",
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22 streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza };
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23
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24 function stream_callbacks.error(session, error, data)
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25 if error == "no-stream" then
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26 session:close("invalid-namespace");
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27 else
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28 session.log("debug", "Server-to-server XML parse error: %s", tostring(error));
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29 session:close("xml-not-well-formed");
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30 end
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31 end
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32
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33 local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), debug.traceback()); end
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34 function stream_callbacks.handlestanza(a, b)
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35 xpcall(function () core_process_stanza(a, b) end, handleerr);
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36 end
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37
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38 local connlisteners_register = require "net.connlisteners".register;
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39
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40 local t_insert = table.insert;
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41 local t_concat = table.concat;
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42 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
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43 local m_random = math.random;
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44 local format = string.format;
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45 local sessionmanager = require "core.sessionmanager";
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46 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
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47 local st = require "util.stanza";
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48
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49 local sessions = {};
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50 local xmppserver = { default_port = 5269, default_mode = "*a" };
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51
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52 -- These are session methods --
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53
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54 local function session_reset_stream(session)
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55 -- Reset stream
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56 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
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57 session.parser = parser;
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58
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59 session.notopen = true;
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60
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61 function session.data(conn, data)
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62 local ok, err = parser:parse(data);
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63 if ok then return; end
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64 session:close("xml-not-well-formed");
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65 end
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66
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67 return true;
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68 end
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69
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70
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71 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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72 local default_stream_attr = { ["xmlns:stream"] = stream_callbacks.stream_tag:gsub("%|[^|]+$", ""), xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
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73 local function session_close(session, reason)
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74 local log = session.log or log;
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75 if session.conn then
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76 if session.notopen then
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77 session.sends2s("<?xml version='1.0'?>");
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78 session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
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79 end
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80 if reason then
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81 if type(reason) == "string" then -- assume stream error
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82 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason);
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83 session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
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84 elseif type(reason) == "table" then
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85 if reason.condition then
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86 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
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87 if reason.text then
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88 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
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89 end
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90 if reason.extra then
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91 stanza:add_child(reason.extra);
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92 end
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93 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza));
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94 session.sends2s(stanza);
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95 elseif reason.name then -- a stanza
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96 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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97 session.sends2s(reason);
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98 end
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99 end
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100 end
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101 session.sends2s("</stream:stream>");
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102 session.conn.close();
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103 xmppserver.disconnect(session.conn, "stream error");
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104 end
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105 end
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106
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107
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108 -- End of session methods --
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109
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110 function xmppserver.listener(conn, data)
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111 local session = sessions[conn];
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112 if not session then
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113 session = s2s_new_incoming(conn);
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114 sessions[conn] = session;
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115
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116 -- Logging functions --
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117
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118
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119 local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$");
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120 session.log = logger.init(conn_name);
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121
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122 session.log("info", "Incoming s2s connection");
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123
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124 session.reset_stream = session_reset_stream;
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125 session.close = session_close;
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126
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127 session_reset_stream(session); -- Initialise, ready for use
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128
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129 session.dispatch_stanza = stream_callbacks.handlestanza;
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130 end
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131 if data then
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132 session.data(conn, data);
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133 end
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134 end
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135
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136 function xmppserver.disconnect(conn, err)
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137 local session = sessions[conn];
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138 if session then
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139 if err and err ~= "closed" and session.srv_hosts then
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140 (session.log or log)("debug", "s2s connection closed unexpectedly");
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141 if s2s_attempt_connect(session, err) then
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142 (session.log or log)("debug", "...so we're going to try again");
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143 return; -- Session lives for now
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144 end
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145 end
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146 (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err));
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147 s2s_destroy_session(session);
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148 sessions[conn] = nil;
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149 session = nil;
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150 collectgarbage("collect");
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151 end
148
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152 end
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153
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154 function xmppserver.register_outgoing(conn, session)
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155 session.direction = "outgoing";
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156 sessions[conn] = session;
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157
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158 session.reset_stream = session_reset_stream;
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159 session.close = session_close;
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160 session_reset_stream(session); -- Initialise, ready for use
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161
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162 --local function handleerr(err) print("Traceback:", err, debug.traceback()); end
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163 --session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end
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164 end
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165
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166 connlisteners_register("xmppserver", xmppserver);
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167
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168
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169 -- We need to perform some initialisation when a connection is created
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170 -- We also need to perform that same initialisation at other points (SASL, TLS, ...)
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171
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172 -- ...and we need to handle data
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173 -- ...and record all sessions associated with connections