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net/xmppserver_listener.lua @ 2081:b9bbb709d62e
net.dns: Be more strict about checking the DNS replies we receive
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Wed, 18 Nov 2009 01:05:38 +0000 |
| parent | 2077:e33658f6052c |
| child | 2129:fcdcdf00787c |
| child | 2779:87b66be6d514 |
| child | 2816:59dfb99831ae |
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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 = { stream_tag = "http://etherx.jabber.org/streams\1stream", |
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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 |
| 331 | 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 |
| 148 | 38 local connlisteners_register = require "net.connlisteners".register; |
| 39 | |
| 40 local t_insert = table.insert; | |
| 41 local t_concat = table.concat; | |
| 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 | |
| 43 local m_random = math.random; | |
| 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"; |
| 148 | 48 |
| 49 local sessions = {}; | |
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50 local xmppserver = { default_port = 5269, default_mode = "*a" }; |
| 148 | 51 |
| 52 -- These are session methods -- | |
| 53 | |
| 54 local function session_reset_stream(session) | |
| 55 -- Reset stream | |
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56 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "\1"); |
| 148 | 57 session.parser = parser; |
| 58 | |
| 59 session.notopen = true; | |
| 60 | |
| 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.log or log)("warn", "Received invalid XML: %s", data); |
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65 (session.log or log)("warn", "Problem was: %s", err); |
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66 session:close("xml-not-well-formed"); |
| 148 | 67 end |
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68 |
| 148 | 69 return true; |
| 70 end | |
| 71 | |
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72 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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73 local default_stream_attr = { ["xmlns:stream"] = stream_callbacks.stream_tag:match("[^\1]*"), xmlns = stream_callbacks.default_ns, version = "1.0", id = "" }; |
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74 local function session_close(session, reason) |
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75 local log = session.log or log; |
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76 if session.conn then |
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77 if session.notopen then |
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78 session.sends2s("<?xml version='1.0'?>"); |
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79 session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag()); |
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80 end |
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81 if reason then |
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82 if type(reason) == "string" then -- assume stream error |
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83 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason); |
| 331 | 84 session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); |
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85 elseif type(reason) == "table" then |
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86 if reason.condition then |
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87 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); |
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88 if reason.text then |
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89 stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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90 end |
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91 if reason.extra then |
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92 stanza:add_child(reason.extra); |
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93 end |
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94 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza)); |
| 331 | 95 session.sends2s(stanza); |
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96 elseif reason.name then -- a stanza |
| 331 | 97 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)); |
| 98 session.sends2s(reason); | |
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99 end |
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100 end |
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101 end |
| 331 | 102 session.sends2s("</stream:stream>"); |
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103 if session.notopen or not session.conn.close() then |
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104 session.conn.close(true); -- Force FIXME: timer? |
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105 end |
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106 session.conn.close(); |
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107 xmppserver.disconnect(session.conn, "stream error"); |
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108 end |
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109 end |
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110 |
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111 |
| 148 | 112 -- End of session methods -- |
| 113 | |
| 114 function xmppserver.listener(conn, data) | |
| 115 local session = sessions[conn]; | |
| 116 if not session then | |
| 117 session = s2s_new_incoming(conn); | |
| 118 sessions[conn] = session; | |
| 119 | |
| 120 -- Logging functions -- | |
| 121 | |
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122 |
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123 local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$"); |
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124 session.log = logger.init(conn_name); |
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125 |
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126 session.log("info", "Incoming s2s connection"); |
| 148 | 127 |
| 128 session.reset_stream = session_reset_stream; | |
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129 session.close = session_close; |
| 148 | 130 |
| 131 session_reset_stream(session); -- Initialise, ready for use | |
| 132 | |
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133 session.dispatch_stanza = stream_callbacks.handlestanza; |
| 148 | 134 end |
| 135 if data then | |
| 136 session.data(conn, data); | |
| 137 end | |
| 138 end | |
| 139 | |
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140 function xmppserver.status(conn, status) |
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141 if status == "ssl-handshake-complete" then |
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142 local session = sessions[conn]; |
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143 if session and session.direction == "outgoing" then |
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144 local format, to_host, from_host = string.format, session.to_host, session.from_host; |
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145 session.log("debug", "Sending stream header..."); |
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146 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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147 end |
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148 end |
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149 end |
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150 |
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151 function xmppserver.disconnect(conn, err) |
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152 local session = sessions[conn]; |
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153 if session then |
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154 if err and err ~= "closed" and session.srv_hosts then |
| 974 | 155 (session.log or log)("debug", "s2s connection closed unexpectedly"); |
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156 if s2s_attempt_connect(session, err) then |
| 974 | 157 (session.log or log)("debug", "...so we're going to try again"); |
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158 return; -- Session lives for now |
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159 end |
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160 end |
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161 (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err)); |
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162 s2s_destroy_session(session); |
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163 sessions[conn] = nil; |
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164 session = nil; |
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165 collectgarbage("collect"); |
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166 end |
| 148 | 167 end |
| 168 | |
| 169 function xmppserver.register_outgoing(conn, session) | |
| 170 session.direction = "outgoing"; | |
| 171 sessions[conn] = session; | |
| 172 | |
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173 session.reset_stream = session_reset_stream; |
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174 session.close = session_close; |
| 148 | 175 session_reset_stream(session); -- Initialise, ready for use |
| 176 | |
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177 --local function handleerr(err) print("Traceback:", err, debug.traceback()); end |
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178 --session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end |
| 148 | 179 end |
| 180 | |
| 181 connlisteners_register("xmppserver", xmppserver); | |
| 182 | |
| 183 | |
| 184 -- We need to perform some initialisation when a connection is created | |
| 185 -- We also need to perform that same initialisation at other points (SASL, TLS, ...) | |
| 186 | |
| 187 -- ...and we need to handle data | |
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188 -- ...and record all sessions associated with connections |
