Mercurial > prosody-modules

annotate mod_muc_limits/mod_muc_limits.lua @ 2608:362ca94192ee

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mod_smacks: Add resumed session to event "smacks-hibernation-end" Older versions of this event only have the "intermediate" session in event.session (the one used to resume the existing session), but not the resumed one. This adds event.resumed which contains the resumed one alongside to event.session.
author tmolitor <thilo@eightysoft.de>
date Sat, 11 Mar 2017 01:37:28 +0100
parents 163967467308
children a81456a13797
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0b41122b19f9 mod_muc_limits: Abort loading on non-MUC hosts (thanks Ge0rG)
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1
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2 local mod_muc = module:depends"muc";
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3 local rooms = rawget(mod_muc, "rooms"); -- Old MUC API
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4 if not rooms then
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5 rooms = module:shared"muc/rooms"; -- New MUC API
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6 end
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7
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8 local jid_split, jid_bare = require "util.jid".split, require "util.jid".bare;
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9 local st = require "util.stanza";
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10 local new_throttle = require "util.throttle".create;
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11 local t_insert, t_concat = table.insert, table.concat;
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13 local xmlns_muc = "http://jabber.org/protocol/muc";
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15 local period = math.max(module:get_option_number("muc_event_rate", 0.5), 0);
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16 local burst = math.max(module:get_option_number("muc_burst_factor", 6), 1);
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17
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18 local max_nick_length = module:get_option_number("muc_max_nick_length", 23); -- Default chosen through scientific methods
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19 local dropped_count = 0;
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20 local dropped_jids;
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22 local function log_dropped()
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23 module:log("warn", "Dropped %d stanzas from %d JIDs: %s", dropped_count, #dropped_jids, t_concat(dropped_jids, ", "));
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24 dropped_count = 0;
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25 dropped_jids = nil;
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26 end
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27
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28 local function handle_stanza(event)
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29 local origin, stanza = event.origin, event.stanza;
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30 if stanza.name == "presence" and stanza.attr.type == "unavailable" then -- Don't limit room leaving
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31 return;
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32 end
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33 local dest_room, dest_host, dest_nick = jid_split(stanza.attr.to);
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34 local room = rooms[dest_room.."@"..dest_host];
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35 if not room then return; end
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36 local from_jid = stanza.attr.from;
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37 local occupant = room._occupants[room._jid_nick[from_jid]];
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38 if (occupant and occupant.affiliation) or (not(occupant) and room._affiliations[jid_bare(from_jid)]) then
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39 module:log("debug", "Skipping stanza from affiliated user...");
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40 return;
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41 elseif dest_nick and max_nick_length and stanza.name == "presence" and not room._occupants[stanza.attr.to] and #dest_nick > max_nick_length then
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42 module:log("debug", "Forbidding long (%d bytes) nick in %s", #dest_nick, dest_room)
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43 origin.send(st.error_reply(stanza, "modify", "policy-violation", "Your nick name is too long, please use a shorter one")
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44 :up():tag("x", { xmlns = xmlns_muc }));
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45 return true;
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46 end
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47 local throttle = room.throttle;
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48 if not room.throttle then
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49 throttle = new_throttle(period*burst, burst);
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50 room.throttle = throttle;
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51 end
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52 if not throttle:poll(1) then
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53 module:log("debug", "Dropping stanza for %s@%s from %s, over rate limit", dest_room, dest_host, from_jid);
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54 if not dropped_jids then
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55 dropped_jids = { [from_jid] = true, from_jid };
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56 module:add_timer(5, log_dropped);
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57 elseif not dropped_jids[from_jid] then
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58 dropped_jids[from_jid] = true;
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59 t_insert(dropped_jids, from_jid);
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60 end
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61 dropped_count = dropped_count + 1;
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62 if stanza.attr.type == "error" then -- We don't want to bounce errors
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63 return true;
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64 end
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65 local reply = st.error_reply(stanza, "wait", "policy-violation", "The room is currently overactive, please try again later");
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66 local body = stanza:get_child_text("body");
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67 if body then
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68 reply:up():tag("body"):text(body):up();
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69 end
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70 local x = stanza:get_child("x", xmlns_muc);
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71 if x then
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72 reply:add_child(st.clone(x));
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73 end
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74 origin.send(reply);
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75 return true;
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76 end
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77 end
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78
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79 function module.unload()
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80 for room_jid, room in pairs(rooms) do
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81 room.throttle = nil;
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82 end
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83 end
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84
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85 module:hook("message/bare", handle_stanza, 501);
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86 module:hook("message/full", handle_stanza, 501);
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87 module:hook("presence/bare", handle_stanza, 501);
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88 module:hook("presence/full", handle_stanza, 501);