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annotate mod_s2s_keepalive/mod_s2s_keepalive.lua @ 4247:1f93fa24611d

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mod_rest: Use promise based HTTP client API Doesn't really simplify anything much.
author Kim Alvefur <zash@zash.se>
date Sun, 15 Nov 2020 15:33:56 +0100
parents 93a980ac1816
children edde5905744a
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1 local st = require "util.stanza";
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2 local watchdog = require "util.watchdog";
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3 local dt = require "util.datetime";
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5 local keepalive_servers = module:get_option_set("keepalive_servers");
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6 local keepalive_interval = module:get_option_number("keepalive_interval", 60);
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7 local keepalive_timeout = module:get_option_number("keepalive_timeout", 593);
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9 local host = module.host;
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10 local s2sout = prosody.hosts[host].s2sout;
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12 local function send_pings()
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13 local ping_hosts = {};
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14
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15 for remote_domain, session in pairs(s2sout) do
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16 if session.type ~= "s2sout_unauthed"
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17 and (not(keepalive_servers) or keepalive_servers:contains(remote_domain)) then
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18 session.sends2s(st.iq({ to = remote_domain, type = "get", from = host, id = "keepalive:"..dt.datetime()})
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19 :tag("ping", { xmlns = "urn:xmpp:ping" })
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20 );
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21 end
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22 end
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24 for session in pairs(prosody.incoming_s2s) do
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25 if session.type ~= "s2sin_unauthed"
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26 and session.to_host == host
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27 and (not(keepalive_servers) or keepalive_servers:contains(session.from_host)) then
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28 if not s2sout[session.from_host] then ping_hosts[session.from_host] = true; end
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29 session.sends2s " ";
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30 -- If the connection is dead, this should make it time out.
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31 end
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32 end
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33
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34 -- ping remotes we only have s2sin from
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35 for remote_domain in pairs(ping_hosts) do
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36 module:send(st.iq({ to = remote_domain, type = "get", from = host, id = "keepalive:"..dt.datetime() })
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37 :tag("ping", { xmlns = "urn:xmpp:ping" })
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38 );
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39 end
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40
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41 return keepalive_interval;
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42 end
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43
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44 module:hook("s2sin-established", function (event)
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45 local session = event.session;
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46 if session.watchdog_keepalive then return end -- in case mod_bidi fires this twice
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47 if keepalive_servers and not keepalive_servers:contains(session.from_host) then return end
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48 session.watchdog_keepalive = watchdog.new(keepalive_timeout, function ()
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49 session.log("info", "Keepalive ping timed out, closing connection");
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50 session:close("connection-timeout");
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51 end);
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52 end);
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53
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54 module:hook("s2sout-established", function (event)
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55 local session = event.session;
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56 if session.watchdog_keepalive then return end -- in case mod_bidi fires this twice
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57 if keepalive_servers and not keepalive_servers:contains(session.from_host) then return end
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58 session.watchdog_keepalive = watchdog.new(keepalive_timeout, function ()
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59 session.log("info", "Keepalive ping timed out, closing connection");
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60 session:close("connection-timeout");
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61 end);
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62 end);
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63
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64 module:hook("iq/host", function (event)
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65 local stanza = event.stanza;
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66 if stanza.attr.type ~= "result" and stanza.attr.type == "error" then
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67 return -- not a reply iq stanza
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68 end
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69 if not (stanza.attr.id and stanza.attr.id:sub(1, #"keepalive:") == "keepalive:") then
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70 return -- not a reply to this module
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71 end
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72
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73 local origin = event.origin;
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74 if origin.dummy then return end -- Probably a sendq bounce
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75 if origin.watchdog_keepalive then
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76 origin.log("debug", "Resetting keepalive watchdog")
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77 origin.watchdog_keepalive:reset();
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78 end
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79 if s2sout[origin.from_host] and s2sout[origin.from_host].watchdog_keepalive then
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80 s2sout[origin.from_host].watchdog_keepalive:reset();
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81 end
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82 return true;
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83 end);
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84
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85 module:add_timer(keepalive_interval, send_pings);