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annotate mod_isolate_host/mod_isolate_host.lua @ 5009:459a4001c1d9

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mod_restrict_xmpp: XMPP-layer access control using Prosody's permissions API
author Matthew Wild <mwild1@gmail.com>
date Mon, 22 Aug 2022 20:03:23 +0100
parents bc75fc9400ae
children 16db0a6e868c
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1 local jid = require "util.jid";
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2 local jid_bare, jid_host = jid.bare, jid.host;
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3 local set = require "util.set";
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4 local st = require "util.stanza";
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5
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6 local stanza_types = set.new{"message", "presence", "iq"};
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7 local jid_types = set.new{"bare", "full", "host"};
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8
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9 local except_domains = module:get_option_inherited_set("isolate_except_domains", {});
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10 local except_users = module:get_option_inherited_set("isolate_except_users", {});
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11
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12 if not module.may then
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13 module:depends("compat_roles");
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14 end
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15
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16 function check_stanza(event)
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17 local origin, stanza = event.origin, event.stanza;
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18 if origin.no_host_isolation then return; end
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19 local to_host = jid_host(event.stanza.attr.to);
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20 if to_host and to_host ~= origin.host and not except_domains:contains(to_host) then
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21 if to_host:match("^[^.]+%.(.+)$") == origin.host then -- Permit subdomains
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22 except_domains:add(to_host);
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23 return;
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24 end
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25 module:log("warn", "Forbidding stanza from %s to %s", stanza.attr.from or origin.full_jid, stanza.attr.to);
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26 origin.send(st.error_reply(stanza, "auth", "forbidden", "Communication with "..to_host.." is not available"));
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27 return true;
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28 end
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29 end
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30
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31 for stanza_type in stanza_types do
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32 for jid_type in jid_types do
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33 module:hook("pre-"..stanza_type.."/"..jid_type, check_stanza, 1);
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34 end
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35 end
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36
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37 module:default_permission("prosody:admin", "xmpp:federate");
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38
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39 function check_user_isolated(event)
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40 local session = event.session;
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41 local bare_jid = jid_bare(session.full_jid);
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42 if module:may("xmpp:federate") or except_users:contains(bare_jid) then
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43 session.no_host_isolation = true;
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44 end
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45 module:log("debug", "%s is %sisolated", session.full_jid or "[?]", session.no_host_isolation and "" or "not ");
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46 end
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47
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48 module:hook("resource-bind", check_user_isolated);