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core/s2smanager.lua @ 337:4a1dd1c2c219
We have SRV resolving \o/
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Tue, 18 Nov 2008 22:41:04 +0000 |
| parent | 333:8d15b073fdbe |
| child | 343:cae2178b5623 |
| rev | line source |
|---|---|
| 148 | 1 |
| 2 local hosts = hosts; | |
| 3 local sessions = sessions; | |
| 4 local socket = require "socket"; | |
| 5 local format = string.format; | |
| 337 | 6 local t_insert, t_sort = table.insert, table.sort; |
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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 | |
| 337 | 27 local dns = require "net.dns"; |
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28 |
| 148 | 29 module "s2smanager" |
| 30 | |
| 337 | 31 local function compare_srv_priorities(a,b) return a.priority < b.priority or a.weight < b.weight; end |
| 32 | |
| 148 | 33 function send_to_host(from_host, to_host, data) |
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34 if data.name then data = tostring(data); end |
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35 local host = hosts[from_host].s2sout[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 |
| 337 | 39 (host.log or 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", tostring(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 host.from_host ~= from_host then |
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56 log("error", "WARNING! This might, possibly, be a bug, but it might not..."); |
| 331 | 57 log("error", "We are going to send from %s instead of %s", tostring(host.from_host), tostring(from_host)); |
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58 end |
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59 host.sends2s(data); |
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60 host.log("debug", "stanza sent over "..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 local open_sessions = 0; | |
| 71 | |
| 72 function new_incoming(conn) | |
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73 local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming" }; |
| 148 | 74 if true then |
| 75 session.trace = newproxy(true); | |
| 76 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end; | |
| 77 end | |
| 78 open_sessions = open_sessions + 1; | |
| 79 local w = conn.write; | |
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80 session.sends2s = function (t) w(tostring(t)); end |
| 148 | 81 return session; |
| 82 end | |
| 83 | |
| 84 function new_outgoing(from_host, to_host) | |
| 85 local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; | |
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86 hosts[from_host].s2sout[to_host] = host_session; |
| 148 | 87 local cl = connlisteners_get("xmppserver"); |
| 88 | |
| 89 local conn, handler = socket.tcp() | |
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90 |
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91 --FIXME: Below parameters (ports/ip) are incorrect (use SRV) |
| 337 | 92 |
| 93 local connect_host, connect_port = to_host, 5269; | |
| 94 | |
| 95 local answer = dns.lookup("_xmpp-server._tcp."..to_host..".", "SRV"); | |
| 96 | |
| 97 if answer then | |
| 98 log("debug", to_host.." has SRV records, handling..."); | |
| 99 local srv_hosts = {}; | |
| 100 host_session.srv_hosts = srv_hosts; | |
| 101 for _, record in ipairs(answer) do | |
| 102 t_insert(srv_hosts, record.srv); | |
| 103 end | |
| 104 t_sort(srv_hosts, compare_srv_priorities); | |
| 105 | |
| 106 local srv_choice = srv_hosts[1]; | |
| 107 if srv_choice then | |
| 108 log("debug", "Best record found"); | |
| 109 connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; | |
| 110 log("debug", "Best record found, will connect to %s:%d", connect_host, connect_port); | |
| 111 end | |
| 112 end | |
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113 |
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114 conn:settimeout(0); |
| 337 | 115 local success, err = conn:connect(connect_host, connect_port); |
| 116 if not success and err ~= "timeout" then | |
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117 log("warn", "s2s connect() failed: %s", err); |
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118 end |
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119 |
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120 conn = wraptlsclient(cl, conn, to_host, 5269, 0, 1, hosts[from_host].ssl_ctx ); |
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121 host_session.conn = conn; |
| 259 | 122 |
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123 -- Register this outgoing connection so that xmppserver_listener knows about it |
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124 -- otherwise it will assume it is a new incoming connection |
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125 cl.register_outgoing(conn, host_session); |
| 259 | 126 |
| 148 | 127 do |
| 128 local conn_name = "s2sout"..tostring(conn):match("[a-f0-9]*$"); | |
| 129 host_session.log = logger_init(conn_name); | |
| 130 end | |
| 131 | |
| 132 local w = conn.write; | |
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133 host_session.sends2s = function (t) w(tostring(t)); end |
| 148 | 134 |
| 135 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)); | |
| 136 | |
| 137 return host_session; | |
| 138 end | |
| 139 | |
| 140 function streamopened(session, attr) | |
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141 local send = session.sends2s; |
| 148 | 142 |
| 143 session.version = tonumber(attr.version) or 0; | |
| 144 if session.version >= 1.0 and not (attr.to and attr.from) then | |
| 145 print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); | |
| 146 --error(session.to_host.." failed to specify 'to' or 'from' hostname as per RFC"); | |
| 147 log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); | |
| 148 end | |
| 149 | |
| 150 if session.direction == "incoming" then | |
| 151 -- Send a reply stream header | |
| 152 | |
| 153 for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end | |
| 154 | |
| 155 session.to_host = attr.to; | |
| 156 session.from_host = attr.from; | |
| 157 | |
| 158 session.streamid = uuid_gen(); | |
| 159 print(session, session.from_host, "incoming s2s stream opened"); | |
| 160 send("<?xml version='1.0'?>"); | |
| 252 | 161 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()); |
| 331 | 162 if session.to_host and not hosts[session.to_host] then |
| 163 -- Attempting to connect to a host we don't serve | |
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164 session:close("host-unknown"); |
| 331 | 165 return; |
| 166 end | |
| 148 | 167 elseif session.direction == "outgoing" then |
| 168 -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
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169 if not attr.id then error("stream response did not give us a streamid!!!"); end |
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170 session.streamid = attr.id; |
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171 |
| 148 | 172 if not session.dialback_verifying then |
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173 initiate_dialback(session); |
| 148 | 174 else |
| 175 mark_connected(session); | |
| 176 end | |
| 177 end | |
| 178 --[[ | |
| 179 local features = {}; | |
| 180 modulemanager.fire_event("stream-features-s2s", session, features); | |
| 181 | |
| 182 send("<stream:features>"); | |
| 183 | |
| 184 for _, feature in ipairs(features) do | |
| 185 send(tostring(feature)); | |
| 186 end | |
| 187 | |
| 188 send("</stream:features>");]] | |
| 259 | 189 |
| 148 | 190 session.notopen = nil; |
| 191 end | |
| 192 | |
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193 function initiate_dialback(session) |
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194 -- generate dialback key |
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195 session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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196 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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197 session.log("info", "sent dialback key on outgoing s2s stream"); |
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198 end |
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199 |
| 148 | 200 function generate_dialback(id, to, from) |
| 201 return md5_hash(id..to..from..dialback_secret); -- FIXME: See XEP-185 and XEP-220 | |
| 202 end | |
| 203 | |
| 204 function verify_dialback(id, to, from, key) | |
| 205 return key == generate_dialback(id, to, from); | |
| 206 end | |
| 207 | |
| 208 function make_authenticated(session) | |
| 209 if session.type == "s2sout_unauthed" then | |
| 210 session.type = "s2sout"; | |
| 211 elseif session.type == "s2sin_unauthed" then | |
| 212 session.type = "s2sin"; | |
| 213 else | |
| 214 return false; | |
| 215 end | |
| 216 session.log("info", "connection is now authenticated"); | |
| 217 | |
| 218 mark_connected(session); | |
| 219 | |
| 220 return true; | |
| 221 end | |
| 222 | |
| 223 function mark_connected(session) | |
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224 local sendq, send = session.sendq, session.sends2s; |
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225 |
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226 local from, to = session.from_host, session.to_host; |
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227 |
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228 session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); |
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229 |
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230 local send_to_host = send_to_host; |
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231 function session.send(data) send_to_host(to, from, data); end |
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232 |
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233 |
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234 if session.direction == "outgoing" then |
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235 if sendq then |
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Log how many queued stanzas we send
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236 session.log("debug", "sending "..#sendq.." queued stanzas across new outgoing connection to "..session.to_host); |
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237 for i, data in ipairs(sendq) do |
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238 send(data); |
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239 sendq[i] = nil; |
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240 end |
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241 session.sendq = nil; |
| 148 | 242 end |
| 243 end | |
| 244 end | |
| 245 | |
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246 function destroy_session(session) |
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247 (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
| 331 | 248 |
| 249 -- FIXME: Flush sendq here/report errors to originators | |
| 250 | |
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251 if session.direction == "outgoing" then |
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Now outgoing s2s sessions are associated with their from_host, fixes #15
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252 hosts[session.from_host].s2sout[session.to_host] = nil; |
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253 end |
| 331 | 254 |
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255 for k in pairs(session) do |
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256 if k ~= "trace" then |
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257 session[k] = nil; |
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258 end |
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259 end |
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260 end |
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261 |
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Just committing this warning, because I want to know if the problem really affects us
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262 return _M; |
