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annotate mod_muc_access_control/mod_muc_access_control.lua @ 2007:dc1299ca0185

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mod_block_outgoing: Make blocked stanza types configurable, and default to blocking messages only
author Matthew Wild <mwild1@gmail.com>
date Wed, 13 Jan 2016 23:04:55 +0000
parents 050cd7b6fa96
children f54c80404ad3
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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 unprepped_access_lists = module:get_option("muc_access_lists", {});
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6 local access_lists = {};
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7
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8 -- Make sure all input is prepped
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9 for unprepped_room_name, unprepped_list in pairs(unprepped_access_lists) do
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10 local prepped_room_name = nodeprep(unprepped_room_name);
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11 if not prepped_room_name then
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12 module:log("error", "Invalid room name: %s", unprepped_room_name);
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13 else
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14 local prepped_list = {};
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15 for _, unprepped_jid in ipairs(unprepped_list) do
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16 local prepped_jid = jid.prep(jid);
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17 if not prepped_jid then
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18 module:log("error", "Invalid JID: %s", unprepped_jid);
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19 else
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20 table.insert(prepped_list, jid.pep(jid));
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21 end
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22 end
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23 end
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24 end
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25
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26 local function is_restricted(room, who)
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27 local allowed = access_lists[room];
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28
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29 if allowed == nil or allowed[who] or allowed[select(2, jid.split(who))] then
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30 return nil;
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31 end
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32
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33 return "forbidden";
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34 end
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35
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36 module:hook("presence/full", function(event)
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37 local stanza = event.stanza;
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38
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39 if stanza.name == "presence" and stanza.attr.type == "unavailable" then -- Leaving events get discarded
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40 return;
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41 end
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42
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43 -- Get the room
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44 local room = jid.split(stanza.attr.to);
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45 if not room then return; end
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46
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47 -- Get who has tried to join it
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48 local who = jid.bare(stanza.attr.from)
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49
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50 -- Checking whether room is restricted
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51 local check_restricted = is_restricted(room, who)
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52 if check_restricted ~= nil then
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53 event.allowed = false;
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54 event.stanza.attr.type = 'error';
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55 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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56 end
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57 end, 10);