Mercurial > prosody-modules

annotate mod_muc_limits/mod_muc_limits.lua @ 4730:1da4b815d2fe

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mod_cloud_notify: Identify (and immediately push) urgent stanzas, e.g. calls This covers the following things: - A session that appears online, but has a broken TCP connection - Clients such as Siskin and Snikket iOS that require a push for calls to work It allows the stanza to be pushed immediately instead of waiting for the session to hibernate or an ack to timeout. It shouldn't break any existing cases.
author Matthew Wild <mwild1@gmail.com>
date Wed, 27 Oct 2021 19:12:03 +0100
parents 2b10e51d85a6
children 731ba9400c10
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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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163967467308 mod_muc_limits: Update to work with both the new and the old MUC API
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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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5 local jid_split, jid_bare = require "util.jid".split, require "util.jid".bare;
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6 local st = require "util.stanza";
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7 local new_throttle = require "util.throttle".create;
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8 local t_insert, t_concat = table.insert, table.concat;
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10 local xmlns_muc = "http://jabber.org/protocol/muc";
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11
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12 local period = math.max(module:get_option_number("muc_event_rate", 0.5), 0);
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13 local burst = math.max(module:get_option_number("muc_burst_factor", 6), 1);
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14
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a44e755f7579 mod_muc_limits: Add muc_max_nick_length option, defaulting to 23 (bytes)
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15 local max_nick_length = module:get_option_number("muc_max_nick_length", 23); -- Default chosen through scientific methods
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16 local join_only = module:get_option_boolean("muc_limit_joins_only", false);
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17 local dropped_count = 0;
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18 local dropped_jids;
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19
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20 local function log_dropped()
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21 module:log("warn", "Dropped %d stanzas from %d JIDs: %s", dropped_count, #dropped_jids, t_concat(dropped_jids, ", "));
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22 dropped_count = 0;
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23 dropped_jids = nil;
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24 end
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26 local function handle_stanza(event)
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27 local origin, stanza = event.origin, event.stanza;
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2356ad05fdb6 mod_muc_limits: Don't limit room leaving
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28 if stanza.name == "presence" and stanza.attr.type == "unavailable" then -- Don't limit room leaving
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29 return;
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30 end
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31 local dest_room, dest_host, dest_nick = jid_split(stanza.attr.to);
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32 local room = event.room or rooms[dest_room.."@"..dest_host];
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33 if not room then return; end
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34 local from_jid = stanza.attr.from;
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35 if room:get_affiliation(jid_bare(from_jid)) then
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36 module:log("debug", "Skipping stanza from affiliated user...");
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37 return;
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38 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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39 module:log("debug", "Forbidding long (%d bytes) nick in %s", #dest_nick, dest_room)
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40 origin.send(st.error_reply(stanza, "modify", "policy-violation", "Your nick name is too long, please use a shorter one")
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41 :up():tag("x", { xmlns = xmlns_muc }));
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42 return true;
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43 end
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44 local throttle = room.throttle;
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45 if not room.throttle then
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46 throttle = new_throttle(period*burst, burst);
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47 room.throttle = throttle;
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48 end
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5c3f3f5a4377 Backed out parts of changeset a81456a13797
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49 if not throttle:poll(1) then
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50 module:log("debug", "Dropping stanza for %s@%s from %s, over rate limit", dest_room, dest_host, from_jid);
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51 if not dropped_jids then
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52 dropped_jids = { [from_jid] = true, from_jid };
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53 module:add_timer(5, log_dropped);
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54 elseif not dropped_jids[from_jid] then
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55 dropped_jids[from_jid] = true;
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56 t_insert(dropped_jids, from_jid);
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57 end
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58 dropped_count = dropped_count + 1;
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59 if stanza.attr.type == "error" then -- We don't want to bounce errors
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60 return true;
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61 end
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62 local reply = st.error_reply(stanza, "wait", "policy-violation", "The room is currently overactive, please try again later");
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63 local body = stanza:get_child_text("body");
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64 if body then
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65 reply:up():tag("body"):text(body):up();
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66 end
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67 local x = stanza:get_child("x", xmlns_muc);
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68 if x then
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69 reply:add_child(st.clone(x));
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70 end
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71 origin.send(reply);
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72 return true;
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73 end
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74 end
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75
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76 if rooms then
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77 function module.unload()
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78 for room_jid, room in pairs(rooms) do --luacheck: ignore 213/room_jid
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79 room.throttle = nil;
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80 end
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81 end
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82
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83 module:hook("presence/full", handle_stanza, 501);
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84 if not join_only then
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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 end
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89 else
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90 module:hook("muc-occupant-pre-join", handle_stanza);
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91 if not join_only then
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92 module:hook("muc-occupant-pre-change", handle_stanza);
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93 module:hook("muc-occupant-groupchat", handle_stanza);
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94 end
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95 end