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annotate mod_admin_blocklist/mod_admin_blocklist.lua @ 5173:460f78654864

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mod_muc_rtbl: also filter messages This was a bit tricky because we don't want to run the JIDs through SHA256 on each message. Took a while to come up with this simple plan of just caching the SHA256 of the JIDs on the occupants. This will leave some dirt in the occupants after unloading the module, but that should be ok; once they cycle the room, the hashes will be gone. This is direly needed, otherwise, there is a tight race between the moderation activities and the actors joining the room.
author Jonas Schäfer <jonas@wielicki.name>
date Tue, 21 Feb 2023 21:37:27 +0100
parents 96e83b4a93f7
children
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1 -- mod_admin_blocklist
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2 --
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3 -- If a local admin has blocked a domain, don't allow s2s to that domain
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4 --
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5 -- Copyright (C) 2015-2022 Kim Alvefur
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6 --
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7 -- This file is MIT/X11 licensed.
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8 --
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10 module:depends("blocklist");
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12 local st = require"util.stanza";
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13 local jid_split = require"util.jid".split;
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15 local usermanager = require "core.usermanager";
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17 local admins;
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18 if usermanager.get_jids_with_role then
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19 local set = require "util.set";
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20 local include_roles = module:get_option_set("admin_blocklist_roles", { "prosody:operator"; "prosody:admin" });
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21
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22 admins = set.new();
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23 for role in include_roles do
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24 admins:include(set.new(usermanager.get_jids_with_role(role, module.host)));
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25 end
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26 else -- COMPAT w/pre-0.12
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27 admins = module:get_option_inherited_set("admins", {});
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28 end
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29 admins = admins /
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30 function (admin) -- Filter out non-local admins
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31 local user, host = jid_split(admin);
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32 if host == module.host then return user; end
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33 end
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35 local blocklists = module:open_store("blocklist");
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37 local function is_blocked(host)
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38 for admin in admins do
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39 local blocklist = blocklists:get(admin);
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40 if blocklist and blocklist[host] then
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41 return true;
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42 end
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43 end
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44 end
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46 module:hook("route/remote", function (event)
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47 local origin, stanza = event.origin, event.stanza;
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48 if is_blocked(event.to_host) then
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49 if origin and stanza then
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50 origin.send(st.error_reply(stanza, "cancel", "not-allowed", "Communication with this domain is not allowed"));
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51 return true;
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52 end
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53 return false;
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54 end
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55 end, -9);
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58 module:hook("s2s-stream-features", function (event)
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59 local session = event.origin;
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60 if is_blocked(session.from_host) then
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61 session:close("policy-violation");
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62 return false;
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63 end
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64 end, 1000);
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65
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66 module:hook("stanza/http://etherx.jabber.org/streams:features", function (event)
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67 local session = event.origin;
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68 if is_blocked(session.to_host) then
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69 session:close("policy-violation");
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70 return true;
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71 end
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72 end, 1000);
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73