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core/s2smanager.lua @ 250:9f66ede8deeb
Added error replies for unhandled stanzas
| author | Waqas Hussain <waqas20@gmail.com> |
|---|---|
| date | Thu, 13 Nov 2008 19:14:31 +0500 |
| parent | 233:23585c323daa |
| child | 241:021ccf988f3b |
| rev | line source |
|---|---|
| 148 | 1 |
| 2 local hosts = hosts; | |
| 3 local sessions = sessions; | |
| 4 local socket = require "socket"; | |
| 5 local format = string.format; | |
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6 local t_insert = table.insert; |
| 148 | 7 local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber |
| 8 = tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; | |
| 9 | |
| 10 local connlisteners_get = require "net.connlisteners".get; | |
| 11 local wraptlsclient = require "net.server".wraptlsclient; | |
| 12 local modulemanager = require "core.modulemanager"; | |
| 13 | |
| 14 local uuid_gen = require "util.uuid".generate; | |
| 15 | |
| 16 local logger_init = require "util.logger".init; | |
| 17 | |
| 18 local log = logger_init("s2smanager"); | |
| 19 | |
| 20 local md5_hash = require "util.hashes".md5; | |
| 21 | |
| 22 local dialback_secret = "This is very secret!!! Ha!"; | |
| 23 | |
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24 local srvmap = { ["gmail.com"] = "talk.google.com", ["identi.ca"] = "longlance.controlezvous.ca", ["cdr.se"] = "jabber.cdr.se" }; |
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25 |
| 148 | 26 module "s2smanager" |
| 27 | |
| 28 function connect_host(from_host, to_host) | |
| 29 end | |
| 30 | |
| 31 function send_to_host(from_host, to_host, data) | |
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32 local host = hosts[to_host]; |
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33 if host then |
| 148 | 34 -- Write to connection |
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35 if host.type == "s2sout_unauthed" and not host.notopen and not host.dialback_key then |
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36 log("debug", "trying to send over unauthed s2sout to "..to_host..", authing it now..."); |
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37 initiate_dialback(host); |
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38 if not host.sendq then host.sendq = { data }; |
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39 else t_insert(host.sendq, data); end |
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40 else |
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41 log("debug", "going to send stanza to "..to_host.." from "..from_host); |
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42 -- FIXME |
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43 if hosts[to_host].from_host ~= from_host then log("error", "WARNING! This might, possibly, be a bug, but it might not..."); end |
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44 hosts[to_host].sends2s(data); |
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45 log("debug", "stanza sent over "..hosts[to_host].type); |
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46 end |
| 148 | 47 else |
| 48 log("debug", "opening a new outgoing connection for this stanza"); | |
| 49 local host_session = new_outgoing(from_host, to_host); | |
| 50 -- Store in buffer | |
| 51 host_session.sendq = { data }; | |
| 52 end | |
| 53 end | |
| 54 | |
| 55 function disconnect_host(host) | |
| 56 | |
| 57 end | |
| 58 | |
| 59 local open_sessions = 0; | |
| 60 | |
| 61 function new_incoming(conn) | |
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62 local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming" }; |
| 148 | 63 if true then |
| 64 session.trace = newproxy(true); | |
| 65 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end; | |
| 66 end | |
| 67 open_sessions = open_sessions + 1; | |
| 68 local w = conn.write; | |
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69 session.sends2s = function (t) w(tostring(t)); end |
| 148 | 70 return session; |
| 71 end | |
| 72 | |
| 73 function new_outgoing(from_host, to_host) | |
| 74 local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; | |
| 75 hosts[to_host] = host_session; | |
| 76 local cl = connlisteners_get("xmppserver"); | |
| 77 | |
| 78 local conn, handler = socket.tcp() | |
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79 |
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80 |
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81 -- Register this outgoing connection so that xmppserver_listener knows about it |
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82 -- otherwise it will assume it is a new incoming connection |
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83 cl.register_outgoing(conn, host_session); |
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84 |
| 148 | 85 --FIXME: Below parameters (ports/ip) are incorrect (use SRV) |
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86 to_host = srvmap[to_host] or to_host; |
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87 conn:settimeout(0.1); |
| 148 | 88 conn:connect(to_host, 5269); |
| 89 conn = wraptlsclient(cl, conn, to_host, 5269, 0, 1, hosts[from_host].ssl_ctx ); | |
| 90 host_session.conn = conn; | |
| 91 | |
| 92 do | |
| 93 local conn_name = "s2sout"..tostring(conn):match("[a-f0-9]*$"); | |
| 94 host_session.log = logger_init(conn_name); | |
| 95 end | |
| 96 | |
| 97 local w = conn.write; | |
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98 host_session.sends2s = function (t) w(tostring(t)); end |
| 148 | 99 |
| 100 conn.write(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)); | |
| 101 | |
| 102 return host_session; | |
| 103 end | |
| 104 | |
| 105 function streamopened(session, attr) | |
| 106 session.log("debug", "s2s stream opened"); | |
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107 local send = session.sends2s; |
| 148 | 108 |
| 109 session.version = tonumber(attr.version) or 0; | |
| 110 if session.version >= 1.0 and not (attr.to and attr.from) then | |
| 111 print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); | |
| 112 --error(session.to_host.." failed to specify 'to' or 'from' hostname as per RFC"); | |
| 113 log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); | |
| 114 end | |
| 115 | |
| 116 if session.direction == "incoming" then | |
| 117 -- Send a reply stream header | |
| 118 | |
| 119 for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end | |
| 120 | |
| 121 session.to_host = attr.to; | |
| 122 session.from_host = attr.from; | |
| 123 | |
| 124 session.streamid = uuid_gen(); | |
| 125 print(session, session.from_host, "incoming s2s stream opened"); | |
| 126 send("<?xml version='1.0'?>"); | |
| 127 send(format("<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s'>", session.streamid, session.to_host)); | |
| 128 elseif session.direction == "outgoing" then | |
| 129 -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
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130 if not attr.id then error("stream response did not give us a streamid!!!"); end |
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131 session.streamid = attr.id; |
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132 |
| 148 | 133 if not session.dialback_verifying then |
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134 initiate_dialback(session); |
| 148 | 135 else |
| 136 mark_connected(session); | |
| 137 end | |
| 138 end | |
| 139 --[[ | |
| 140 local features = {}; | |
| 141 modulemanager.fire_event("stream-features-s2s", session, features); | |
| 142 | |
| 143 send("<stream:features>"); | |
| 144 | |
| 145 for _, feature in ipairs(features) do | |
| 146 send(tostring(feature)); | |
| 147 end | |
| 148 | |
| 149 send("</stream:features>");]] | |
| 150 log("info", "s2s stream opened successfully"); | |
| 151 session.notopen = nil; | |
| 152 end | |
| 153 | |
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154 function initiate_dialback(session) |
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155 -- generate dialback key |
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156 session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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157 session.sends2s(format("<db:result from='%s' to='%s'>%s</db:result>", session.from_host, session.to_host, session.dialback_key)); |
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158 session.log("info", "sent dialback key on outgoing s2s stream"); |
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159 end |
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160 |
| 148 | 161 function generate_dialback(id, to, from) |
| 162 return md5_hash(id..to..from..dialback_secret); -- FIXME: See XEP-185 and XEP-220 | |
| 163 end | |
| 164 | |
| 165 function verify_dialback(id, to, from, key) | |
| 166 return key == generate_dialback(id, to, from); | |
| 167 end | |
| 168 | |
| 169 function make_authenticated(session) | |
| 170 if session.type == "s2sout_unauthed" then | |
| 171 session.type = "s2sout"; | |
| 172 elseif session.type == "s2sin_unauthed" then | |
| 173 session.type = "s2sin"; | |
| 174 else | |
| 175 return false; | |
| 176 end | |
| 177 session.log("info", "connection is now authenticated"); | |
| 178 | |
| 179 mark_connected(session); | |
| 180 | |
| 181 return true; | |
| 182 end | |
| 183 | |
| 184 function mark_connected(session) | |
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185 local sendq, send = session.sendq, session.sends2s; |
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186 |
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187 local from, to = session.from_host, session.to_host; |
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188 |
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189 session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); |
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190 |
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191 local send_to_host = send_to_host; |
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192 function session.send(data) send_to_host(to, from, data); end |
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193 |
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194 |
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195 if session.direction == "outgoing" then |
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196 if sendq then |
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197 session.log("debug", "sending queued stanzas across new outgoing connection to "..session.to_host); |
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198 for i, data in ipairs(sendq) do |
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199 send(data); |
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200 sendq[i] = nil; |
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201 end |
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202 session.sendq = nil; |
| 148 | 203 end |
| 204 end | |
| 205 end | |
| 206 | |
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207 function destroy_session(session) |
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208 (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
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209 if session.direction == "outgoing" then |
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210 hosts[session.to_host] = nil; |
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211 end |
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212 session.conn = nil; |
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213 session.disconnect = nil; |
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214 for k in pairs(session) do |
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215 if k ~= "trace" then |
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216 session[k] = nil; |
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217 end |
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218 end |
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219 end |
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220 |
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Just committing this warning, because I want to know if the problem really affects us
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221 return _M; |
