prosody-modules
a2b0174b5c48
mod_muc_limits/mod_muc_limits.lua

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mod_muc_limits/mod_muc_limits.lua @ 554:a2b0174b5c48

mod_muc_limits: New module to impose overall rate-limits on a MUC (not on individual users)
author Matthew Wild <mwild1@gmail.com>
date Sun, 15 Jan 2012 01:08:15 +0000
child 555:2356ad05fdb6
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553:7310ceb7564f 554:a2b0174b5c48
1
2 local st = require "util.stanza";
3 local new_throttle = require "util.throttle".create;
4
5 local period = math.max(module:get_option_number("muc_event_rate", 0.5), 0);
6 local burst = math.max(module:get_option_number("muc_burst_factor", 6), 1);
7
8 local function handle_stanza(event)
9 local origin, stanza = event.origin, event.stanza;
10 local dest_room, dest_host, dest_nick = jid.split(stanza.attr.to);
11 local room = hosts[module.host].modules.muc.rooms[dest_room.."@"..dest_host];
12 if not room then return; end
13 local from_jid = stanza.attr.from;
14 local occupant = room._occupants[room._jid_nick[from_jid]];
15 if occupant and occupant.affiliation then
16 module:log("debug", "Skipping stanza from affiliated user...");
17 return;
18 end
19 local throttle = room.throttle;
20 if not room.throttle then
21 throttle = new_throttle(period*burst, burst);
22 room.throttle = throttle;
23 end
24 if not throttle:poll(1) then
25 module:log("warn", "Dropping stanza for %s@%s from %s, over rate limit", dest_room, dest_host, from_jid);
26 origin.send(st.error_reply(stanza, "wait", "policy-violation", "The room is currently overactive, please try again later"));
27 return true;
28 end
29 end
30
31 module:hook("message/bare", handle_stanza, 10);
32 module:hook("message/full", handle_stanza, 10);
33 module:hook("presence/bare", handle_stanza, 10);
34 module:hook("presence/full", handle_stanza, 10);