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annotate mod_extdisco/mod_extdisco.lua @ 4877:adc6241e5d16

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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 7811ba467525
children
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1 local st = require "util.stanza";
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2
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3 local services = module:get_option("external_services");
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4
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5 local xmlns_extdisco_1 = "urn:xmpp:extdisco:1";
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6 local xmlns_extdisco_2 = "urn:xmpp:extdisco:2";
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8 module:add_feature(xmlns_extdisco_1);
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9 module:add_feature(xmlns_extdisco_2);
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11 local function handle_services(event)
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12 local origin, stanza = event.origin, event.stanza;
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13 local service = stanza.tags[1];
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14 local service_type = service.attr.type;
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15 local reply = st.reply(stanza):tag("services", { xmlns = service.attr.xmlns });
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16 for host, service_info in pairs(services) do
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17 if not(service_type) or service_info.type == service_type then
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18 reply:tag("service", {
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19 host = host;
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20 port = service_info.port;
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21 transport = service_info.transport;
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22 type = service_info.type;
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23 username = service_info.username;
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24 password = service_info.password;
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25 }):up();
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26 end
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27 end
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28 origin.send(reply);
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29 return true;
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30 end
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31 module:hook("iq-get/host/"..xmlns_extdisco_1..":services", handle_services);
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32 module:hook("iq-get/host/"..xmlns_extdisco_2..":services", handle_services);
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34 local function handle_credentials(event)
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35 local origin, stanza = event.origin, event.stanza;
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36 local credentials = stanza.tags[1];
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37 local host = credentials.attr.host;
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38 if not host then
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39 origin.send(st.error_reply(stanza, "cancel", "bad-request", "No host specified"));
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40 return true;
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41 end
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42 local service_info = services[host];
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43 if not service_info then
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44 origin.send(st.error_reply(stanza, "cancel", "item-not-found", "No such service known"));
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45 return true;
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46 end
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47 local reply = st.reply(stanza)
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48 :tag("credentials", { xmlns = credentials.attr.xmlns })
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49 :tag("service", {
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50 host = host;
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51 username = service_info.username;
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52 password = service_info.password;
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53 }):up();
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54 origin.send(reply);
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55 return true;
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56 end
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57 module:hook("iq-get/host/"..xmlns_extdisco_1..":credentials", handle_credentials);
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58 module:hook("iq-get/host/"..xmlns_extdisco_2..":credentials", handle_credentials);