annotate mod_poke_strangers/mod_poke_strangers.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 0aa8aa6cdb1b
children 1e28f32257d6
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1 local st = require"util.stanza";
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2 local jid_split = require "util.jid".split;
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3 local jid_bare = require "util.jid".bare;
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4 local is_contact_subscribed = require "core.rostermanager".is_contact_subscribed;
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5 local uuid_generate = require "util.uuid".generate;
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6 local set = require "util.set";
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7
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8 local recently_queried = set.new();
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10 local version_id = uuid_generate();
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11 local disco_id = uuid_generate();
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12
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13 module:hook("iq-result/host/" .. version_id, function (event)
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14 module:log("info", "Stranger " .. event.stanza.attr.from .. " version: " .. tostring(event.stanza));
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15 return true;
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16 end);
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18 module:hook("iq-result/host/" .. disco_id, function (event)
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19 module:log("info", "Stranger " .. event.stanza.attr.from .. " disco: " .. tostring(event.stanza));
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20 return true;
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21 end);
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23 function check_subscribed(event)
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24 local stanza = event.stanza;
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25 local local_user_jid = stanza.attr.to;
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26 local to_user, to_host, to_resource = jid_split(local_user_jid);
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27 local stranger_jid = stanza.attr.from;
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28
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29 if recently_queried:contains(stranger_jid) then
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30 module:log("debug", "Not re-poking " .. stranger_jid);
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31 return nil;
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32 end
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34 local from_jid = jid_bare(stranger_jid);
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36 if to_user and not is_contact_subscribed(to_user, to_host, from_jid) then
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37 if to_resource and stanza.attr.type == "groupchat" then
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38 return nil;
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39 end
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41 recently_queried:add(stranger_jid);
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43 module:send(st.iq({ type = "get", to = stranger_jid, from = to_host, id = version_id }):query("jabber:iq:version"));
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45 module:send(st.iq({ type = "get", to = stranger_jid, from = to_host, id = disco_id }):query("http://jabber.org/protocol/disco#info"));
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46 end
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47
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48 return nil;
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49 end
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51 module:hook("message/bare", check_subscribed, 225);
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52 module:hook("message/full", check_subscribed, 225);
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53 -- Not hooking iqs, as that could turn into infinite loops!