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core/s2smanager.lua @ 257:762274c98040
I knew it ;) Fix sending error replies over s2s (though we shouldn't be error'ing on stream:features anyway)
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Fri, 14 Nov 2008 02:33:20 +0000 |
| parent | 256:c14ddd0912a2 |
| child | 258:a93ccd84db83 |
| 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; |
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7 local get_traceback = debug.traceback; |
| 148 | 8 local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber |
| 9 = tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; | |
| 10 | |
| 11 local connlisteners_get = require "net.connlisteners".get; | |
| 12 local wraptlsclient = require "net.server".wraptlsclient; | |
| 13 local modulemanager = require "core.modulemanager"; | |
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14 local st = require "stanza"; |
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15 local stanza = st.stanza; |
| 148 | 16 |
| 17 local uuid_gen = require "util.uuid".generate; | |
| 18 | |
| 19 local logger_init = require "util.logger".init; | |
| 20 | |
| 21 local log = logger_init("s2smanager"); | |
| 22 | |
| 23 local md5_hash = require "util.hashes".md5; | |
| 24 | |
| 25 local dialback_secret = "This is very secret!!! Ha!"; | |
| 26 | |
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27 local srvmap = { ["gmail.com"] = "talk.google.com", ["identi.ca"] = "longlance.controlezvous.ca", ["cdr.se"] = "jabber.cdr.se" }; |
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28 |
| 148 | 29 module "s2smanager" |
| 30 | |
| 31 function connect_host(from_host, to_host) | |
| 32 end | |
| 33 | |
| 34 function send_to_host(from_host, to_host, data) | |
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35 local host = hosts[to_host]; |
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36 if host then |
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37 -- We have a connection to this host already |
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38 if host.type == "s2sout_unauthed" then |
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39 host.log("debug", "trying to send over unauthed s2sout to "..to_host..", authing it now..."); |
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40 if not host.notopen and not host.dialback_key then |
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41 host.log("debug", "dialback had not been initiated"); |
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42 initiate_dialback(host); |
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43 end |
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44 |
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45 -- Queue stanza until we are able to send it |
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46 if host.sendq then t_insert(host.sendq, data); |
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47 else host.sendq = { data }; end |
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48 elseif host.type == "local" or host.type == "component" then |
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49 log("error", "Trying to send a stanza to ourselves??") |
| 256 | 50 log("error", "Traceback: %s", get_traceback()); |
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51 log("error", "Stanza: %s", data); |
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52 else |
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53 (host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host); |
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54 -- FIXME |
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55 if hosts[to_host].from_host ~= from_host then |
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56 log("error", "WARNING! This might, possibly, be a bug, but it might not..."); |
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57 log("error", "We are going to send from %s instead of %s", hosts[to_host].from_host, from_host); |
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58 end |
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59 hosts[to_host].sends2s(data); |
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60 host.log("debug", "stanza sent over "..hosts[to_host].type); |
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61 end |
| 148 | 62 else |
| 63 log("debug", "opening a new outgoing connection for this stanza"); | |
| 64 local host_session = new_outgoing(from_host, to_host); | |
| 65 -- Store in buffer | |
| 66 host_session.sendq = { data }; | |
| 67 end | |
| 68 end | |
| 69 | |
| 70 function disconnect_host(host) | |
| 71 | |
| 72 end | |
| 73 | |
| 74 local open_sessions = 0; | |
| 75 | |
| 76 function new_incoming(conn) | |
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77 local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming" }; |
| 148 | 78 if true then |
| 79 session.trace = newproxy(true); | |
| 80 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end; | |
| 81 end | |
| 82 open_sessions = open_sessions + 1; | |
| 83 local w = conn.write; | |
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84 session.sends2s = function (t) w(tostring(t)); end |
| 148 | 85 return session; |
| 86 end | |
| 87 | |
| 88 function new_outgoing(from_host, to_host) | |
| 89 local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; | |
| 90 hosts[to_host] = host_session; | |
| 91 local cl = connlisteners_get("xmppserver"); | |
| 92 | |
| 93 local conn, handler = socket.tcp() | |
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94 |
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95 --FIXME: Below parameters (ports/ip) are incorrect (use SRV) |
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96 to_host = srvmap[to_host] or to_host; |
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97 |
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98 conn:settimeout(0); |
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99 local success, err = conn:connect(to_host, 5269); |
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100 if not success then |
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101 log("warn", "s2s connect() failed: %s", err); |
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102 end |
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103 |
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104 conn = wraptlsclient(cl, conn, to_host, 5269, 0, 1, hosts[from_host].ssl_ctx ); |
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105 host_session.conn = conn; |
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106 |
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107 -- Register this outgoing connection so that xmppserver_listener knows about it |
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108 -- otherwise it will assume it is a new incoming connection |
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109 cl.register_outgoing(conn, host_session); |
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110 |
| 148 | 111 do |
| 112 local conn_name = "s2sout"..tostring(conn):match("[a-f0-9]*$"); | |
| 113 host_session.log = logger_init(conn_name); | |
| 114 end | |
| 115 | |
| 116 local w = conn.write; | |
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117 host_session.sends2s = function (t) w(tostring(t)); end |
| 148 | 118 |
| 119 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)); | |
| 120 | |
| 121 return host_session; | |
| 122 end | |
| 123 | |
| 124 function streamopened(session, attr) | |
| 125 session.log("debug", "s2s stream opened"); | |
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126 local send = session.sends2s; |
| 148 | 127 |
| 128 session.version = tonumber(attr.version) or 0; | |
| 129 if session.version >= 1.0 and not (attr.to and attr.from) then | |
| 130 print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); | |
| 131 --error(session.to_host.." failed to specify 'to' or 'from' hostname as per RFC"); | |
| 132 log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); | |
| 133 end | |
| 134 | |
| 135 if session.direction == "incoming" then | |
| 136 -- Send a reply stream header | |
| 137 | |
| 138 for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end | |
| 139 | |
| 140 session.to_host = attr.to; | |
| 141 session.from_host = attr.from; | |
| 142 | |
| 143 session.streamid = uuid_gen(); | |
| 144 print(session, session.from_host, "incoming s2s stream opened"); | |
| 145 send("<?xml version='1.0'?>"); | |
| 252 | 146 send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host }):top_tag()); |
| 148 | 147 elseif session.direction == "outgoing" then |
| 148 -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
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149 if not attr.id then error("stream response did not give us a streamid!!!"); end |
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150 session.streamid = attr.id; |
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151 |
| 148 | 152 if not session.dialback_verifying then |
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153 initiate_dialback(session); |
| 148 | 154 else |
| 155 mark_connected(session); | |
| 156 end | |
| 157 end | |
| 158 --[[ | |
| 159 local features = {}; | |
| 160 modulemanager.fire_event("stream-features-s2s", session, features); | |
| 161 | |
| 162 send("<stream:features>"); | |
| 163 | |
| 164 for _, feature in ipairs(features) do | |
| 165 send(tostring(feature)); | |
| 166 end | |
| 167 | |
| 168 send("</stream:features>");]] | |
| 169 log("info", "s2s stream opened successfully"); | |
| 170 session.notopen = nil; | |
| 171 end | |
| 172 | |
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173 function initiate_dialback(session) |
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174 -- generate dialback key |
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175 session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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176 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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177 session.log("info", "sent dialback key on outgoing s2s stream"); |
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178 end |
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179 |
| 148 | 180 function generate_dialback(id, to, from) |
| 181 return md5_hash(id..to..from..dialback_secret); -- FIXME: See XEP-185 and XEP-220 | |
| 182 end | |
| 183 | |
| 184 function verify_dialback(id, to, from, key) | |
| 185 return key == generate_dialback(id, to, from); | |
| 186 end | |
| 187 | |
| 188 function make_authenticated(session) | |
| 189 if session.type == "s2sout_unauthed" then | |
| 190 session.type = "s2sout"; | |
| 191 elseif session.type == "s2sin_unauthed" then | |
| 192 session.type = "s2sin"; | |
| 193 else | |
| 194 return false; | |
| 195 end | |
| 196 session.log("info", "connection is now authenticated"); | |
| 197 | |
| 198 mark_connected(session); | |
| 199 | |
| 200 return true; | |
| 201 end | |
| 202 | |
| 203 function mark_connected(session) | |
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204 local sendq, send = session.sendq, session.sends2s; |
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205 |
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206 local from, to = session.from_host, session.to_host; |
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207 |
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208 session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); |
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209 |
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210 local send_to_host = send_to_host; |
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211 function session.send(data) send_to_host(to, from, data); end |
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212 |
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213 |
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214 if session.direction == "outgoing" then |
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215 if sendq then |
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216 session.log("debug", "sending queued stanzas across new outgoing connection to "..session.to_host); |
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217 for i, data in ipairs(sendq) do |
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218 send(data); |
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219 sendq[i] = nil; |
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220 end |
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221 session.sendq = nil; |
| 148 | 222 end |
| 223 end | |
| 224 end | |
| 225 | |
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226 function destroy_session(session) |
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227 (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
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228 if session.direction == "outgoing" then |
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229 hosts[session.to_host] = nil; |
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230 end |
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231 session.conn = nil; |
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232 session.disconnect = nil; |
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233 for k in pairs(session) do |
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234 if k ~= "trace" then |
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235 session[k] = nil; |
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236 end |
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237 end |
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238 end |
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239 |
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240 return _M; |
