Fri, 24 Oct 2008 07:27:36 +0100
s2s works! \o/ \o/
148 | 1 | |
2 | local hosts = hosts; | |
3 | local sessions = sessions; | |
4 | local socket = require "socket"; | |
5 | local format = string.format; | |
6 | local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber | |
7 | = tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; | |
8 | ||
9 | local connlisteners_get = require "net.connlisteners".get; | |
10 | local wraptlsclient = require "net.server".wraptlsclient; | |
11 | local modulemanager = require "core.modulemanager"; | |
12 | ||
13 | local uuid_gen = require "util.uuid".generate; | |
14 | ||
15 | local logger_init = require "util.logger".init; | |
16 | ||
17 | local log = logger_init("s2smanager"); | |
18 | ||
19 | local md5_hash = require "util.hashes".md5; | |
20 | ||
21 | local dialback_secret = "This is very secret!!! Ha!"; | |
22 | ||
23 | module "s2smanager" | |
24 | ||
25 | function connect_host(from_host, to_host) | |
26 | end | |
27 | ||
28 | function send_to_host(from_host, to_host, data) | |
29 | if hosts[to_host] then | |
30 | -- Write to connection | |
31 | hosts[to_host].send(data); | |
32 | log("debug", "stanza sent over s2s"); | |
33 | else | |
34 | log("debug", "opening a new outgoing connection for this stanza"); | |
35 | local host_session = new_outgoing(from_host, to_host); | |
36 | -- Store in buffer | |
37 | host_session.sendq = { data }; | |
38 | end | |
39 | end | |
40 | ||
41 | function disconnect_host(host) | |
42 | ||
43 | end | |
44 | ||
45 | local open_sessions = 0; | |
46 | ||
47 | function new_incoming(conn) | |
48 | local session = { conn = conn, priority = 0, type = "s2sin_unauthed", direction = "incoming" }; | |
49 | if true then | |
50 | session.trace = newproxy(true); | |
51 | getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end; | |
52 | end | |
53 | open_sessions = open_sessions + 1; | |
54 | local w = conn.write; | |
55 | session.send = function (t) w(tostring(t)); end | |
56 | return session; | |
57 | end | |
58 | ||
59 | function new_outgoing(from_host, to_host) | |
60 | local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; | |
61 | hosts[to_host] = host_session; | |
62 | ||
63 | local cl = connlisteners_get("xmppserver"); | |
64 | ||
65 | local conn, handler = socket.tcp() | |
66 | --FIXME: Below parameters (ports/ip) are incorrect (use SRV) | |
67 | conn:connect(to_host, 5269); | |
68 | conn = wraptlsclient(cl, conn, to_host, 5269, 0, 1, hosts[from_host].ssl_ctx ); | |
69 | host_session.conn = conn; | |
70 | ||
71 | -- Register this outgoing connection so that xmppserver_listener knows about it | |
72 | -- otherwise it will assume it is a new incoming connection | |
73 | cl.register_outgoing(conn, host_session); | |
74 | ||
75 | do | |
76 | local conn_name = "s2sout"..tostring(conn):match("[a-f0-9]*$"); | |
77 | host_session.log = logger_init(conn_name); | |
78 | end | |
79 | ||
80 | local w = conn.write; | |
81 | host_session.send = function (t) w(tostring(t)); end | |
82 | ||
83 | 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)); | |
84 | ||
85 | return host_session; | |
86 | end | |
87 | ||
88 | function streamopened(session, attr) | |
89 | session.log("debug", "s2s stream opened"); | |
90 | local send = session.send; | |
91 | ||
92 | session.version = tonumber(attr.version) or 0; | |
93 | if session.version >= 1.0 and not (attr.to and attr.from) then | |
94 | print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); | |
95 | --error(session.to_host.." failed to specify 'to' or 'from' hostname as per RFC"); | |
96 | log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); | |
97 | end | |
98 | ||
99 | if session.direction == "incoming" then | |
100 | -- Send a reply stream header | |
101 | ||
102 | for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end | |
103 | ||
104 | session.to_host = attr.to; | |
105 | session.from_host = attr.from; | |
106 | ||
107 | session.streamid = uuid_gen(); | |
108 | print(session, session.from_host, "incoming s2s stream opened"); | |
109 | send("<?xml version='1.0'?>"); | |
110 | 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)); | |
111 | if session.from_host then | |
112 | -- Need to perform dialback to check identity | |
113 | print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); | |
114 | print("Need to do dialback here you know!!"); | |
115 | end | |
116 | elseif session.direction == "outgoing" then | |
117 | -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
118 | if not session.dialback_verifying then | |
119 | -- generate dialback key | |
120 | if not attr.id then error("stream response did not give us a streamid!!!"); end | |
121 | session.streamid = attr.id; | |
122 | session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); | |
123 | session.send(format("<db:result from='%s' to='%s'>%s</db:result>", session.from_host, session.to_host, session.dialback_key)); | |
124 | session.log("info", "sent dialback key on outgoing s2s stream"); | |
125 | else | |
126 | mark_connected(session); | |
127 | end | |
128 | end | |
129 | --[[ | |
130 | local features = {}; | |
131 | modulemanager.fire_event("stream-features-s2s", session, features); | |
132 | ||
133 | send("<stream:features>"); | |
134 | ||
135 | for _, feature in ipairs(features) do | |
136 | send(tostring(feature)); | |
137 | end | |
138 | ||
139 | send("</stream:features>");]] | |
140 | log("info", "s2s stream opened successfully"); | |
141 | session.notopen = nil; | |
142 | end | |
143 | ||
144 | function generate_dialback(id, to, from) | |
145 | return md5_hash(id..to..from..dialback_secret); -- FIXME: See XEP-185 and XEP-220 | |
146 | end | |
147 | ||
148 | function verify_dialback(id, to, from, key) | |
149 | return key == generate_dialback(id, to, from); | |
150 | end | |
151 | ||
152 | function make_authenticated(session) | |
153 | if session.type == "s2sout_unauthed" then | |
154 | session.type = "s2sout"; | |
155 | elseif session.type == "s2sin_unauthed" then | |
156 | session.type = "s2sin"; | |
157 | else | |
158 | return false; | |
159 | end | |
160 | session.log("info", "connection is now authenticated"); | |
161 | ||
162 | mark_connected(session); | |
163 | ||
164 | return true; | |
165 | end | |
166 | ||
167 | function mark_connected(session) | |
168 | local sendq, send = session.sendq, session.send; | |
169 | if sendq then | |
170 | session.log("debug", "sending queued stanzas across new connection"); | |
171 | for _, data in ipairs(sendq) do | |
172 | session.log("debug", "sending: %s", tostring(data)); | |
173 | send(data); | |
174 | end | |
175 | end | |
176 | end | |
177 | ||
178 | return _M; |