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annotate mod_isolate_host/mod_isolate_host.lua @ 4887:806f7c8d830b

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mod_ping_muc: Remove 'kick' status code The intent is "you fell off", not "you were kicked out", however older clients may not recognise the 333 code, but that will have to be an acceptable loss.
author Kim Alvefur <zash@zash.se>
date Mon, 07 Feb 2022 16:52:19 +0100
parents 8e19b943c2cd
children bc75fc9400ae
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1011
9466efd10af9 mod_isolate_host: Prevent communication between hosts, even internal ones
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1 local jid = require "util.jid";
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2 local jid_bare, jid_split = jid.bare, jid.split;
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3 local is_admin = require "core.usermanager".is_admin;
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4 local set = require "util.set";
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5 local st = require "util.stanza";
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6
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7 local stanza_types = set.new{"message", "presence", "iq"};
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8 local jid_types = set.new{"bare", "full", "host"};
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9
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10 local except_domains = module:get_option_inherited_set("isolate_except_domains", {});
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11 local except_users = module:get_option_inherited_set("isolate_except_users", {});
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12
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13 function check_stanza(event)
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14 local origin, stanza = event.origin, event.stanza;
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15 if origin.no_host_isolation then return; end
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16 local to_user, to_host = jid_split(event.stanza.attr.to);
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17 if to_host and to_host ~= origin.host and not except_domains:contains(to_host) then
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18 if to_host:match("^[^.]+%.(.+)$") == origin.host then -- Permit subdomains
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19 except_domains:add(to_host);
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20 return;
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21 end
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22 module:log("warn", "Forbidding stanza from %s to %s", stanza.attr.from or origin.full_jid, stanza.attr.to);
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23 origin.send(st.error_reply(stanza, "auth", "forbidden", "Communication with "..to_host.." is not available"));
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24 return true;
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25 end
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26 end
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27
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28 for stanza_type in stanza_types do
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29 for jid_type in jid_types do
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parents: 1011
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30 module:hook("pre-"..stanza_type.."/"..jid_type, check_stanza, 1);
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31 end
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32 end
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33
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34 function check_user_isolated(event)
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35 local session = event.session;
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36 local bare_jid = jid_bare(session.full_jid);
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37 if is_admin(bare_jid, module.host) or except_users:contains(bare_jid) then
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38 session.no_host_isolation = true;
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39 end
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40 module:log("debug", "%s is %sisolated", session.full_jid or "[?]", session.no_host_isolation and "" or "not ");
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41 end
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42
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43 module:hook("resource-bind", check_user_isolated);