annotate mod_bind2/mod_bind2.lua @ 4877:adc6241e5d16

mod_measure_process: Report the enforced limit The soft limit is what the kernel actually enforces, while the hard limit is is how far you can change the soft limit without privileges. Unless the process dynamically adjusts the soft limit, knowing the hard limit is not as useful as knowing the soft limit. Reporting the soft limit and the number of in-use FDs allows placing alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author Kim Alvefur <zash@zash.se>
date Tue, 18 Jan 2022 18:55:20 +0100
parents 1539ae696613
children
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1 local mm = require "core.modulemanager";
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2 local sm = require "core.sessionmanager";
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3
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4 local xmlns_sasl2 --[[<const>]] = "urn:xmpp:sasl:1";
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5 local xmlns_bind2 --[[<const>]] = "urn:xmpp:bind2:0";
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6 local xmlns_carbons --[[<const>]] = "urn:xmpp:carbons:2";
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7
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8 module:depends("sasl2");
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9 module:depends("carbons");
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10
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11 module:hook("stream-features", function(event)
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12 local origin, features = event.origin, event.features;
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13 if origin.type ~= "c2s_unauthed" then return end
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14 features:tag("bind", xmlns_bind2):up();
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15 end);
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16
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17 module:hook_tag(xmlns_sasl2, "authenticate", function (session, auth)
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18 session.bind2 = auth:get_child("bind", xmlns_bind2);
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19 end, 1);
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20
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21 module:hook("sasl2/c2s/success", function (event)
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22 local session = event.session;
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23 if not session.bind2 then return end
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24
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25 -- When it receives a bind 2.0 on an authenticated not-yet-bound session, the
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26 -- server MUST:
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27
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28 -- Clear the offline messages for this user, if any, without sending them (as
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29 -- they will be provided by MAM).
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30 if mm.is_loaded(module.host, "offline") then -- luacheck: ignore 542
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31 -- TODO
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32 end
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33
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34 -- Perform resource binding to a random resource (see 6120)
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35 if not sm.bind_resource(session, nil) then
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36 -- FIXME How should this be handled even?
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37 session:close("reset");
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38 return true;
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39 end
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40
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41 -- Work out which contacts have unread messages in the user's MAM archive,
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42 -- how many, and what the id of the last read message is
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43 -- XXX How do we know what the last read message was?
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44 -- TODO archive:summary(session.username, { after = ??? });
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45
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46 -- Get the id of the newest stanza in the user's MAM archive
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47 -- TODO archive:find(session.username, { reverse = true, limit = 1 });
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48
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49 -- Silently enable carbons for this session
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50 session.carbons = xmlns_carbons;
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51
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52 -- After processing the bind stanza, as above, the server MUST respond with
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53 -- an element of type 'bound' in the namespace 'urn:xmpp:bind2:0', as in the
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54 -- below example
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55 event.success:tag("bound", xmlns_bind2):text_tag("jid", session.full_jid):up();
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56
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57 session.bind2 = nil;
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58 end);