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annotate mod_restrict_federation/mod_restrict_federation.lua @ 6398:9c9889ad4302

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mod_unsubscriber: Add MUC support This catches XEP-0045 Join stanzas and replies with an error telling the prospective participant that the supposed MUC is gone. The user or their client can then take action to remove any bookmark or at least disable autojoin.
author Kim Alvefur <zash@zash.se>
date Sat, 07 Feb 2026 12:25:52 +0100
parents ba2c344e1bdd
children 981c14bb8975
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1 local jid_node = require "prosody.util.jid".node;
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2 local st = require "prosody.util.stanza";
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3
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4 local get_user_role = require "prosody.core.usermanager".get_user_role;
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5
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6 function check_outgoing_stanza(event)
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7 local origin, stanza = event.origin, event.stanza;
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8
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9 if not origin or origin.type ~= "c2s" then
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10 -- We only filter user-originated traffic, so
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11 -- pass this through.
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12 return;
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13 end
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14
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15 if module:may("xmpp:federate", event) then
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16 -- Pass through
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17 return;
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18 end
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19
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20 -- Block
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21 module:log("debug", "Forbidding outgoing %s stanza from <%s> to <%s>", stanza.name, stanza.attr.from, stanza.attr.to);
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22 local err_reply = st.error_reply(event.stanza, "auth", "policy-violation", "Communication with remote domains is not permitted");
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23 origin.send(err_reply);
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24 return true;
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25 end
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26
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27 function check_incoming_stanza(event)
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28 local origin, stanza = event.origin, event.stanza;
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29
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30 if origin.type ~= "s2sin" then
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31 -- We only filter incoming traffic from remote domains
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32 -- Pass through
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33 return;
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34 end
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35
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36 local recipient_username = jid_node(stanza.attr.to);
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37 if not recipient_username then
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38 return;
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39 end
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40
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41 local recipient_role, role_err = get_user_role(recipient_username, module.host);
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42 if not recipient_role then
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43 module:log("warn", "Unable to determine recipient role: %s", role_err);
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44 -- No idea what the role is, we'll pass it through
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45 return;
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46 end
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47
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48 if recipient_role:may("xmpp:federate") then
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49 -- Allowed, pass through
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50 return;
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51 end
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52
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53 -- Block
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54 module:log("debug", "Forbidding incoming %s stanza from <%s> to <%s>", stanza.name, stanza.attr.from, stanza.attr.to);
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55 local err_reply = st.error_reply(event.stanza, "cancel", "service-unavailable");
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56 origin.send(err_reply);
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57 return true;
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58 end
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59
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60 module:hook("message/bare", check_incoming_stanza, 500);
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61 module:hook("message/full", check_incoming_stanza, 500);
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62 module:hook("presence/bare", check_incoming_stanza, 500);
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63 module:hook("presence/full", check_incoming_stanza, 500);
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64 module:hook("iq/bare", check_incoming_stanza, 500);
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65 module:hook("iq/full", check_incoming_stanza, 500);
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66
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67 module:hook("route/remote", check_outgoing_stanza, 500);