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annotate mod_srvinjection/mod_srvinjection.lua @ 5536:96dec7681af8

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mod_firewall: Update user marks to store instantly via map store The original approach was to keep marks in memory only, and persist them at shutdown. That saves I/O, at the cost of potentially losing marks on an unclean shutdown. This change persists marks instantly, which may have some performance overhead but should be more "correct". It also splits the marking/unmarking into an event which may be watched or even fired by other modules.
author Matthew Wild <mwild1@gmail.com>
date Thu, 08 Jun 2023 16:20:42 +0100
parents 47fb4f36dacd
children
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2 module:set_global();
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4 local adns = require "net.adns";
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6 local map_config = module:get_option("srvinjection") or {};
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7 local map = module:shared "s2s_map"
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9 for host, mapping in pairs(map_config) do
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10 if type(mapping) == "table" and type(mapping[1]) == "string" and (type(mapping[2]) == "number") then
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11 local connecthost, connectport = mapping[1], mapping[2] or 5269;
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12 map[host] = {{
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13 srv = {
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14 target = connecthost..".";
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15 port = connectport;
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16 priority = 1;
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17 weight = 0;
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18 };
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19 }};
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20 else
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21 module:log("warn", "Ignoring invalid SRV injection for host '%s'", host);
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22 map[host] = nil;
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23 end
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24 end
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26 local original_lookup = adns.lookup;
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27 function adns.lookup(handler, qname, qtype, qclass)
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28 if qtype == "SRV" then
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29 local host = qname:match("^_xmpp%-server%._tcp%.(.*)%.$");
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30 local mapping = map[host] or map["*"];
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31 if mapping then
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32 handler(mapping);
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33 return;
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34 end
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35 elseif qtype == "A" then
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36 if (qname == "localhost." or qname == "127.0.0.1.") then
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37 handler({{ a = "127.0.0.1" }});
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38 return;
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39 end
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40 local ip = qname:match("^(%d+.%d+.%d+.%d+).$");
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41 if ip then
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42 handler({{ a = ip }});
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43 return;
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44 end
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45 end
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46 return original_lookup(handler, qname, qtype, qclass);
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47 end
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49 function module.unload()
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50 adns.lookup = original_lookup;
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51 end