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annotate mod_muc_restrict_rooms/mod_muc_restrict_rooms.lua @ 5234:f6c71d9d6dc0

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mod_firewall: README: Clarify docs about some of the stanza processing actions
author Matthew Wild <mwild1@gmail.com>
date Sat, 11 Mar 2023 18:29:38 +0000
parents 79adec50b24d
children
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1 local st = require "util.stanza";
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2 local jid = require "util.jid";
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3 local nodeprep = require "util.encodings".stringprep.nodeprep;
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4
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5 local rooms = module:shared "muc/rooms";
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6 if not rooms then
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7 module:log("error", "This module only works on MUC components!");
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8 return;
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9 end
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11 local restrict_patterns = module:get_option("muc_restrict_matching", {});
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12 local restrict_excepts = module:get_option_set("muc_restrict_exceptions", {});
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13 local restrict_allow_admins = module:get_option_boolean("muc_restrict_allow_admins", false);
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15 local function is_restricted(room, who)
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16 -- If admins can join prohibited rooms, we allow them to
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17 if restrict_allow_admins and usermanager.is_admin(who, module.host) then
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18 module:log("debug", "Admins are allowed to enter restricted rooms (%s on %s)", who, room)
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19 return nil;
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20 end
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21
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22 -- Don't evaluate exceptions
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23 if restrict_excepts:contains(room) then
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24 module:log("debug", "Room %s is amongst restriction exceptions", room())
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25 return nil;
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26 end
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28 -- Evaluate regexps of restricted patterns
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29 for pattern,reason in pairs(restrict_patterns) do
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30 if room:match(pattern) then
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31 module:log("debug", "Room %s is restricted by pattern %s, user %s is not allowed to join (%s)", room, pattern, who, reason)
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32 return reason;
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33 end
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34 end
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35
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36 return nil
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37 end
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39 module:hook("presence/full", function(event)
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40 local stanza = event.stanza;
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41
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42 if stanza.name == "presence" and stanza.attr.type == "unavailable" then -- Leaving events get discarded
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43 return;
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44 end
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46 -- Get the room
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47 local room = jid.split(stanza.attr.to);
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48 if not room then return; end
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49
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50 -- Get who has tried to join it
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51 local who = jid.bare(stanza.attr.from)
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52
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53 -- Checking whether room is restricted
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54 local check_restricted = is_restricted(room, who)
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55 if check_restricted ~= nil then
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56 event.allowed = false;
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57 event.stanza.attr.type = 'error';
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58 return event.origin.send(st.error_reply(event.stanza, "cancel", "forbidden", "You're not allowed to enter this room: " .. check_restricted));
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59 end
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60 end, 10);