Thu, 13 Nov 2008 03:48:20 +0000
Change sending reply stream header to use top_tag()
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 |
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34 | -- We have a connection to this host already |
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35 | if host.type == "s2sout_unauthed" then |
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36 | host.log("debug", "trying to send over unauthed s2sout to "..to_host..", authing it now..."); |
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37 | if not host.notopen and not host.dialback_key then |
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38 | host.log("debug", "dialback had not been initiated"); |
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39 | initiate_dialback(host); |
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40 | end |
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41 | |
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42 | -- Queue stanza until we are able to send it |
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43 | if host.sendq then t_insert(host.sendq, data); |
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44 | else host.sendq = { data }; end |
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45 | else |
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46 | host.log("debug", "going to send stanza to "..to_host.." from "..from_host); |
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47 | -- FIXME |
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48 | 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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49 | hosts[to_host].sends2s(data); |
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50 | host.log("debug", "stanza sent over "..hosts[to_host].type); |
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51 | end |
148 | 52 | else |
53 | log("debug", "opening a new outgoing connection for this stanza"); | |
54 | local host_session = new_outgoing(from_host, to_host); | |
55 | -- Store in buffer | |
56 | host_session.sendq = { data }; | |
57 | end | |
58 | end | |
59 | ||
60 | function disconnect_host(host) | |
61 | ||
62 | end | |
63 | ||
64 | local open_sessions = 0; | |
65 | ||
66 | function new_incoming(conn) | |
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67 | local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming" }; |
148 | 68 | if true then |
69 | session.trace = newproxy(true); | |
70 | getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end; | |
71 | end | |
72 | open_sessions = open_sessions + 1; | |
73 | local w = conn.write; | |
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74 | session.sends2s = function (t) w(tostring(t)); end |
148 | 75 | return session; |
76 | end | |
77 | ||
78 | function new_outgoing(from_host, to_host) | |
79 | local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; | |
80 | hosts[to_host] = host_session; | |
81 | local cl = connlisteners_get("xmppserver"); | |
82 | ||
83 | local conn, handler = socket.tcp() | |
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84 | |
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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 | |
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88 | conn:settimeout(0); |
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89 | local success, err = conn:connect(to_host, 5269); |
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90 | if not success then |
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91 | log("warn", "s2s connect() failed: %s", err); |
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92 | end |
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93 | |
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94 | conn = wraptlsclient(cl, conn, to_host, 5269, 0, 1, hosts[from_host].ssl_ctx ); |
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95 | host_session.conn = conn; |
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96 | |
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97 | -- Register this outgoing connection so that xmppserver_listener knows about it |
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98 | -- otherwise it will assume it is a new incoming connection |
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99 | cl.register_outgoing(conn, host_session); |
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100 | |
148 | 101 | do |
102 | local conn_name = "s2sout"..tostring(conn):match("[a-f0-9]*$"); | |
103 | host_session.log = logger_init(conn_name); | |
104 | end | |
105 | ||
106 | local w = conn.write; | |
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107 | host_session.sends2s = function (t) w(tostring(t)); end |
148 | 108 | |
109 | 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)); | |
110 | ||
111 | return host_session; | |
112 | end | |
113 | ||
114 | function streamopened(session, attr) | |
115 | session.log("debug", "s2s stream opened"); | |
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116 | local send = session.sends2s; |
148 | 117 | |
118 | session.version = tonumber(attr.version) or 0; | |
119 | if session.version >= 1.0 and not (attr.to and attr.from) then | |
120 | print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); | |
121 | --error(session.to_host.." failed to specify 'to' or 'from' hostname as per RFC"); | |
122 | log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); | |
123 | end | |
124 | ||
125 | if session.direction == "incoming" then | |
126 | -- Send a reply stream header | |
127 | ||
128 | for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end | |
129 | ||
130 | session.to_host = attr.to; | |
131 | session.from_host = attr.from; | |
132 | ||
133 | session.streamid = uuid_gen(); | |
134 | print(session, session.from_host, "incoming s2s stream opened"); | |
135 | send("<?xml version='1.0'?>"); | |
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136 | 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 })); |
148 | 137 | elseif session.direction == "outgoing" then |
138 | -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
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139 | if not attr.id then error("stream response did not give us a streamid!!!"); end |
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140 | session.streamid = attr.id; |
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141 | |
148 | 142 | if not session.dialback_verifying then |
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143 | initiate_dialback(session); |
148 | 144 | else |
145 | mark_connected(session); | |
146 | end | |
147 | end | |
148 | --[[ | |
149 | local features = {}; | |
150 | modulemanager.fire_event("stream-features-s2s", session, features); | |
151 | ||
152 | send("<stream:features>"); | |
153 | ||
154 | for _, feature in ipairs(features) do | |
155 | send(tostring(feature)); | |
156 | end | |
157 | ||
158 | send("</stream:features>");]] | |
159 | log("info", "s2s stream opened successfully"); | |
160 | session.notopen = nil; | |
161 | end | |
162 | ||
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163 | function initiate_dialback(session) |
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164 | -- generate dialback key |
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165 | session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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166 | 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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167 | session.log("info", "sent dialback key on outgoing s2s stream"); |
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168 | end |
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169 | |
148 | 170 | function generate_dialback(id, to, from) |
171 | return md5_hash(id..to..from..dialback_secret); -- FIXME: See XEP-185 and XEP-220 | |
172 | end | |
173 | ||
174 | function verify_dialback(id, to, from, key) | |
175 | return key == generate_dialback(id, to, from); | |
176 | end | |
177 | ||
178 | function make_authenticated(session) | |
179 | if session.type == "s2sout_unauthed" then | |
180 | session.type = "s2sout"; | |
181 | elseif session.type == "s2sin_unauthed" then | |
182 | session.type = "s2sin"; | |
183 | else | |
184 | return false; | |
185 | end | |
186 | session.log("info", "connection is now authenticated"); | |
187 | ||
188 | mark_connected(session); | |
189 | ||
190 | return true; | |
191 | end | |
192 | ||
193 | function mark_connected(session) | |
186
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194 | local sendq, send = session.sendq, session.sends2s; |
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195 | |
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196 | local from, to = session.from_host, session.to_host; |
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197 | |
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198 | session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); |
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199 | |
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200 | local send_to_host = send_to_host; |
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201 | function session.send(data) send_to_host(to, from, data); end |
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202 | |
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203 | |
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204 | if session.direction == "outgoing" then |
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205 | if sendq then |
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206 | session.log("debug", "sending queued stanzas across new outgoing connection to "..session.to_host); |
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207 | for i, data in ipairs(sendq) do |
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208 | send(data); |
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209 | sendq[i] = nil; |
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210 | end |
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211 | session.sendq = nil; |
148 | 212 | end |
213 | end | |
214 | end | |
215 | ||
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216 | function destroy_session(session) |
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217 | (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
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218 | if session.direction == "outgoing" then |
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219 | hosts[session.to_host] = nil; |
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220 | end |
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221 | session.conn = nil; |
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222 | session.disconnect = nil; |
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223 | for k in pairs(session) do |
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224 | if k ~= "trace" then |
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225 | session[k] = nil; |
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226 | end |
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227 | end |
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228 | end |
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229 | |
225
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230 | return _M; |