prosody-modules
a6d215c73c47
mod_component_roundrobin/mod_component_roundrobin.lua

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mod_component_roundrobin/mod_component_roundrobin.lua @ 406:a6d215c73c47

mod_component_roundrobin: Initial commit.
author Waqas Hussain <waqas20@gmail.com>
date Sun, 28 Aug 2011 21:41:46 +0500
child 1252:08e50d742392
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405:fe4fdba21a23 406:a6d215c73c47
1 -- Prosody IM
2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
4 --
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
7 --
8
9 if module:get_host_type() ~= "component" then
10 error("Don't load mod_component manually, it should be for a component, please see http://prosody.im/doc/components", 0);
11 end
12
13 local hosts = _G.hosts;
14
15 local t_concat = table.concat;
16
17 local sha1 = require "util.hashes".sha1;
18 local st = require "util.stanza";
19
20 local log = module._log;
21
22 local sessions = {};
23
24 local function on_destroy(session, err)
25 if sessions[session] then
26 sessions[session] = nil;
27 session.on_destroy = nil;
28 end
29 end
30
31 local last_session;
32 local function handle_stanza(event)
33 local stanza = event.stanza;
34 if next(sessions) then
35 stanza.attr.xmlns = nil;
36 last_session = next(sessions, last_session) or next(sessions);
37 last_session.send(stanza);
38 else
39 log("warn", "Component not connected, bouncing error for: %s", stanza:top_tag());
40 if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
41 event.origin.send(st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable"));
42 end
43 end
44 return true;
45 end
46
47 module:hook("iq/bare", handle_stanza, -1);
48 module:hook("message/bare", handle_stanza, -1);
49 module:hook("presence/bare", handle_stanza, -1);
50 module:hook("iq/full", handle_stanza, -1);
51 module:hook("message/full", handle_stanza, -1);
52 module:hook("presence/full", handle_stanza, -1);
53 module:hook("iq/host", handle_stanza, -1);
54 module:hook("message/host", handle_stanza, -1);
55 module:hook("presence/host", handle_stanza, -1);
56
57 --- Handle authentication attempts by components
58 function handle_component_auth(event)
59 local session, stanza = event.origin, event.stanza;
60
61 if session.type ~= "component" then return; end
62 if sessions[session] then return; end
63
64 if (not session.host) or #stanza.tags > 0 then
65 (session.log or log)("warn", "Invalid component handshake for host: %s", session.host);
66 session:close("not-authorized");
67 return true;
68 end
69
70 local secret = module:get_option("component_secret");
71 if not secret then
72 (session.log or log)("warn", "Component attempted to identify as %s, but component_secret is not set", session.host);
73 session:close("not-authorized");
74 return true;
75 end
76
77 local supplied_token = t_concat(stanza);
78 local calculated_token = sha1(session.streamid..secret, true);
79 if supplied_token:lower() ~= calculated_token:lower() then
80 log("info", "Component authentication failed for %s", session.host);
81 session:close{ condition = "not-authorized", text = "Given token does not match calculated token" };
82 return true;
83 end
84
85 -- Add session to sessions table
86 sessions[session] = true;
87 session.on_destroy = on_destroy;
88 session.component_validate_from = module:get_option_boolean("validate_from_addresses", true);
89 log("info", "Component successfully authenticated: %s", session.host);
90 session.send(st.stanza("handshake"));
91
92 return true;
93 end
94
95 module:hook("stanza/jabber:component:accept:handshake", handle_component_auth);