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annotate mod_admin_blocklist/mod_admin_blocklist.lua @ 2313:5d05139d0555

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mod_admin_blocklist: Do block check only when a stanza is about to trigger a new outgoing s2s connection
author Kim Alvefur <zash@zash.se>
date Sat, 01 Oct 2016 00:59:15 +0200
parents c2d43b568178
children 683d1ad16b56
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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 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 admins = module:get_option_inherited_set("admins", {}) /
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16 function (admin) -- Filter out non-local admins
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17 local user, host = jid_split(admin);
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18 if host == module.host then return user; end
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19 end
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21 local blocklists = module:open_store("blocklist");
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23 local function is_blocked(host)
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24 for admin in admins do
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25 local blocklist = blocklists:get(admin);
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26 if blocklist and blocklist[host] then
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27 return true;
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28 end
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29 end
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30 end
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32 module:hook("route/remote", function (event)
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33 local origin, stanza = event.origin, event.stanza;
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34 if is_blocked(event.to_host) then
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35 if origin and stanza then
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36 origin.send(st.error_reply(stanza, "cancel", "not-allowed", "Communication with this domain is not allowed"));
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37 return true;
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38 end
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39 return false;
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40 end
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41 end, -9);
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44 module:hook("s2s-stream-features", function (event)
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45 local session = event.origin;
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46 if is_blocked(session.from_host) then
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47 session:close("policy-violation");
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48 return false;
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49 end
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50 end, 1000);
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52 module:hook("stanza/http://etherx.jabber.org/streams:features", function (event)
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53 local session = event.origin;
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54 if is_blocked(session.to_host) then
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55 session:close("policy-violation");
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56 return true;
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57 end
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58 end, 1000);
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