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plugins/mod_c2s.lua @ 5877:615a0774e4cc
util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Wed, 30 Oct 2013 17:44:42 -0400 |
parent | 5859:e327f2d4e09f |
child | 6005:98b768a41c9d |
rev | line source |
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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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Remove all trailing whitespace
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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 module:set_global(); |
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10 |
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11 local add_task = require "util.timer".add_task; |
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12 local new_xmpp_stream = require "util.xmppstream".new; |
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13 local nameprep = require "util.encodings".stringprep.nameprep; |
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14 local sessionmanager = require "core.sessionmanager"; |
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15 local st = require "util.stanza"; |
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16 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; |
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17 local uuid_generate = require "util.uuid".generate; |
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18 local runner = require "util.async".runner; |
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19 |
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20 local xpcall, tostring, type = xpcall, tostring, type; |
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21 local t_insert, t_remove = table.insert, table.remove; |
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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 local log = module._log; |
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26 |
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27 local c2s_timeout = module:get_option_number("c2s_timeout"); |
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28 local stream_close_timeout = module:get_option_number("c2s_close_timeout", 5); |
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29 local opt_keepalives = module:get_option_boolean("c2s_tcp_keepalives", module:get_option_boolean("tcp_keepalives", true)); |
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30 |
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31 local sessions = module:shared("sessions"); |
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mod_admin_adhoc, mod_admin_telnet, mod_bosh, mod_c2s, mod_component, mod_pep, mod_presence, mod_roster, mod_s2s: Import core_post_stanza from the global prosody table.
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32 local core_process_stanza = prosody.core_process_stanza; |
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33 local hosts = prosody.hosts; |
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34 |
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35 local stream_callbacks = { default_ns = "jabber:client" }; |
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36 local listener = {}; |
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37 local runner_callbacks = {}; |
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38 |
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39 --- Stream events handlers |
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40 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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41 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" }; |
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42 |
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43 function stream_callbacks.streamopened(session, attr) |
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44 local send = session.send; |
4551 | 45 session.host = nameprep(attr.to); |
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46 if not session.host then |
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47 session:close{ condition = "improper-addressing", |
4551 | 48 text = "A valid 'to' attribute is required on stream headers" }; |
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49 return; |
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50 end |
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51 session.version = tonumber(attr.version) or 0; |
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52 session.streamid = uuid_generate(); |
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53 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host); |
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54 |
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55 if not hosts[session.host] or not hosts[session.host].modules.c2s then |
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56 -- We don't serve this host... |
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57 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)}; |
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58 return; |
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59 end |
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60 |
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61 send("<?xml version='1.0'?>"..st.stanza("stream:stream", { |
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62 xmlns = 'jabber:client', ["xmlns:stream"] = 'http://etherx.jabber.org/streams'; |
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63 id = session.streamid, from = session.host, version = '1.0', ["xml:lang"] = 'en' }):top_tag()); |
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64 |
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65 (session.log or log)("debug", "Sent reply <stream:stream> to client"); |
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66 session.notopen = nil; |
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67 |
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68 -- If session.secure is *false* (not nil) then it means we /were/ encrypting |
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69 -- since we now have a new stream header, session is secured |
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70 if session.secure == false then |
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71 session.secure = true; |
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72 session.encrypted = true; |
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73 |
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74 local sock = session.conn:socket(); |
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75 if sock.info then |
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76 local info = sock:info(); |
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77 (session.log or log)("info", "Stream encrypted (%s with %s)", info.protocol, info.cipher); |
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78 session.compressed = info.compression; |
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79 else |
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80 (session.log or log)("info", "Stream encrypted"); |
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81 session.compressed = sock.compression and sock:compression(); --COMPAT mw/luasec-hg |
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82 end |
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83 end |
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84 |
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85 local features = st.stanza("stream:features"); |
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86 hosts[session.host].events.fire_event("stream-features", { origin = session, features = features }); |
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87 send(features); |
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88 end |
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89 |
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90 function stream_callbacks.streamclosed(session) |
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91 session.log("debug", "Received </stream:stream>"); |
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92 session:close(false); |
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93 end |
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94 |
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95 function stream_callbacks.error(session, error, data) |
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96 if error == "no-stream" then |
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97 session.log("debug", "Invalid opening stream header"); |
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98 session:close("invalid-namespace"); |
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99 elseif error == "parse-error" then |
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100 (session.log or log)("debug", "Client XML parse error: %s", tostring(data)); |
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101 session:close("not-well-formed"); |
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102 elseif error == "stream-error" then |
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103 local condition, text = "undefined-condition"; |
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104 for child in data:children() do |
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105 if child.attr.xmlns == xmlns_xmpp_streams then |
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106 if child.name ~= "text" then |
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107 condition = child.name; |
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108 else |
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109 text = child:get_text(); |
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110 end |
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111 if condition ~= "undefined-condition" and text then |
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112 break; |
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113 end |
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114 end |
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115 end |
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116 text = condition .. (text and (" ("..text..")") or ""); |
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117 session.log("info", "Session closed by remote with error: %s", text); |
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118 session:close(nil, text); |
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119 end |
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120 end |
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121 |
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122 function stream_callbacks.handlestanza(session, stanza) |
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123 stanza = session.filter("stanzas/in", stanza); |
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124 session.thread:run(stanza); |
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125 end |
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126 |
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127 --- Session methods |
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128 local function session_close(session, reason) |
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129 local log = session.log or log; |
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130 if session.conn then |
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131 if session.notopen then |
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132 session.send("<?xml version='1.0'?>"); |
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133 session.send(st.stanza("stream:stream", default_stream_attr):top_tag()); |
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134 end |
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135 if reason then -- nil == no err, initiated by us, false == initiated by client |
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136 local stream_error = st.stanza("stream:error"); |
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137 if type(reason) == "string" then -- assume stream error |
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138 stream_error:tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }); |
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139 elseif type(reason) == "table" then |
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140 if reason.condition then |
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141 stream_error:tag(reason.condition, stream_xmlns_attr):up(); |
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142 if reason.text then |
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143 stream_error:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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144 end |
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145 if reason.extra then |
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146 stream_error:add_child(reason.extra); |
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147 end |
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148 elseif reason.name then -- a stanza |
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149 stream_error = reason; |
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150 end |
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151 end |
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152 stream_error = tostring(stream_error); |
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153 log("debug", "Disconnecting client, <stream:error> is: %s", stream_error); |
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154 session.send(stream_error); |
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155 end |
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156 |
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157 session.send("</stream:stream>"); |
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158 function session.send() return false; end |
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159 |
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160 local reason = (reason and (reason.name or reason.text or reason.condition)) or reason; |
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161 session.log("debug", "c2s stream for %s closed: %s", session.full_jid or ("<"..session.ip..">"), reason or "session closed"); |
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162 |
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163 -- Authenticated incoming stream may still be sending us stanzas, so wait for </stream:stream> from remote |
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164 local conn = session.conn; |
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165 if reason == nil and not session.notopen and session.type == "c2s" then |
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166 -- Grace time to process data from authenticated cleanly-closed stream |
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167 add_task(stream_close_timeout, function () |
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168 if not session.destroyed then |
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169 session.log("warn", "Failed to receive a stream close response, closing connection anyway..."); |
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170 sm_destroy_session(session, reason); |
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171 conn:close(); |
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172 end |
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173 end); |
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174 else |
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175 sm_destroy_session(session, reason); |
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176 conn:close(); |
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177 end |
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178 end |
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179 end |
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180 |
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181 module:hook_global("user-deleted", function(event) |
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182 local username, host = event.username, event.host; |
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183 local user = hosts[host].sessions[username]; |
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184 if user and user.sessions then |
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185 for jid, session in pairs(user.sessions) do |
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186 session:close{ condition = "not-authorized", text = "Account deleted" }; |
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187 end |
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188 end |
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189 end, 200); |
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190 |
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191 function runner_callbacks:ready() |
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192 self.data.conn:resume(); |
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193 end |
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194 |
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195 function runner_callbacks:waiting() |
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196 self.data.conn:pause(); |
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197 end |
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198 |
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199 function runner_callbacks:error(err) |
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200 (self.data.log or log)("error", "Traceback[c2s]: %s", err); |
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201 end |
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202 |
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203 --- Port listener |
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204 function listener.onconnect(conn) |
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205 local session = sm_new_session(conn); |
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206 sessions[conn] = session; |
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207 |
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208 session.log("info", "Client connected"); |
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209 |
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210 -- Client is using legacy SSL (otherwise mod_tls sets this flag) |
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211 if conn:ssl() then |
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212 session.secure = true; |
5859
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213 session.encrypted = true; |
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214 |
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215 -- Check if TLS compression is used |
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216 local sock = conn:socket(); |
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217 if sock.info then |
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218 session.compressed = sock:info"compression"; |
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219 elseif sock.compression then |
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220 session.compressed = sock:compression(); --COMPAT mw/luasec-hg |
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221 end |
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222 end |
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223 |
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224 if opt_keepalives then |
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225 conn:setoption("keepalive", opt_keepalives); |
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226 end |
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227 |
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228 session.close = session_close; |
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229 |
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230 local stream = new_xmpp_stream(session, stream_callbacks); |
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231 session.stream = stream; |
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232 session.notopen = true; |
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233 |
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234 function session.reset_stream() |
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235 session.notopen = true; |
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236 session.stream:reset(); |
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237 end |
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238 |
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239 session.thread = runner(function (stanza) |
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240 core_process_stanza(session, stanza); |
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|
241 end, runner_callbacks, session); |
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242 |
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|
243 local filter = session.filter; |
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244 function session.data(data) |
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245 -- Parse the data, which will store stanzas in session.pending_stanzas |
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246 if data then |
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247 data = filter("bytes/in", data); |
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248 if data then |
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249 local ok, err = stream:feed(data); |
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250 if not ok then |
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251 log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_")); |
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252 session:close("not-well-formed"); |
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253 end |
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254 end |
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255 end |
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256 end |
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257 |
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258 if c2s_timeout then |
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259 add_task(c2s_timeout, function () |
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260 if session.type == "c2s_unauthed" then |
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261 session:close("connection-timeout"); |
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262 end |
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263 end); |
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264 end |
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265 |
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266 session.dispatch_stanza = stream_callbacks.handlestanza; |
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267 end |
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268 |
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269 function listener.onincoming(conn, data) |
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270 local session = sessions[conn]; |
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271 if session then |
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272 session.data(data); |
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273 end |
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274 end |
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275 |
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276 function listener.ondisconnect(conn, err) |
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277 local session = sessions[conn]; |
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278 if session then |
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279 (session.log or log)("info", "Client disconnected: %s", err or "connection closed"); |
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280 sm_destroy_session(session, err); |
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281 sessions[conn] = nil; |
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282 end |
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283 end |
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284 |
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285 function listener.onreadtimeout(conn) |
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286 local session = sessions[conn]; |
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287 if session then |
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288 return (hosts[session.host] or prosody).events.fire_event("c2s-read-timeout", { session = session }); |
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289 end |
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290 end |
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291 |
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292 local function keepalive(event) |
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293 return event.session.send(' '); |
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294 end |
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295 |
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296 function listener.associate_session(conn, session) |
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297 sessions[conn] = session; |
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298 end |
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299 |
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300 function module.add_host(module) |
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301 module:hook("c2s-read-timeout", keepalive, -1); |
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302 end |
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303 |
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304 module:hook("c2s-read-timeout", keepalive, -1); |
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305 |
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306 module:hook("server-stopping", function(event) |
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307 local reason = event.reason; |
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308 for _, session in pairs(sessions) do |
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309 session:close{ condition = "system-shutdown", text = reason }; |
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310 end |
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311 end, 1000); |
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312 |
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313 |
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314 |
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315 module:provides("net", { |
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316 name = "c2s"; |
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317 listener = listener; |
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318 default_port = 5222; |
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319 encryption = "starttls"; |
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320 multiplex = { |
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321 pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:client%1.*>"; |
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322 }; |
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323 }); |
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324 |
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325 module:provides("net", { |
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326 name = "legacy_ssl"; |
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327 listener = listener; |
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328 encryption = "ssl"; |
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329 multiplex = { |
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330 pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:client%1.*>"; |
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331 }; |
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332 }); |
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333 |
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334 |