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annotate mod_s2s_keepalive/mod_s2s_keepalive.lua @ 3974:f14c862598a9

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mod_muc_rai: New module to implement Room Activity Indicators
author Matthew Wild <mwild1@gmail.com>
date Wed, 15 Apr 2020 21:19:45 +0100
parents 580862decd77
children c4002aae4ad3
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1 local st = require "util.stanza";
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2 local watchdog = require "util.watchdog";
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4 local keepalive_servers = module:get_option_set("keepalive_servers");
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5 local keepalive_interval = module:get_option_number("keepalive_interval", 60);
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6 local keepalive_timeout = module:get_option_number("keepalive_timeout", 593);
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8 local host = module.host;
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9 local s2sout = prosody.hosts[host].s2sout;
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11 local function send_pings()
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12 local ping_hosts = {};
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13
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14 for remote_domain, session in pairs(s2sout) do
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15 if session.type ~= "s2sout_unauthed"
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16 and (not(keepalive_servers) or keepalive_servers:contains(remote_domain)) then
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17 session.sends2s(st.iq({ to = remote_domain, type = "get", from = host, id = "keepalive" })
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18 :tag("ping", { xmlns = "urn:xmpp:ping" })
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19 );
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20 end
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21 end
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22
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23 for session in pairs(prosody.incoming_s2s) do
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24 if session.type ~= "s2sin_unauthed"
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25 and session.to_host == host
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26 and (not(keepalive_servers) or keepalive_servers:contains(session.from_host)) then
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27 if not s2sout[session.from_host] then ping_hosts[session.from_host] = true; end
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28 session.sends2s " ";
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29 -- If the connection is dead, this should make it time out.
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30 end
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31 end
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32
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33 -- ping remotes we only have s2sin from
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34 for remote_domain in pairs(ping_hosts) do
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35 module:send(st.iq({ to = remote_domain, type = "get", from = host, id = "keepalive" })
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36 :tag("ping", { xmlns = "urn:xmpp:ping" })
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37 );
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38 end
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39
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40 return keepalive_interval;
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41 end
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42
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43 module:hook("s2sin-established", function (event)
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44 local session = event.session;
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45 if session.watchdog_keepalive then return end -- in case mod_bidi fires this twice
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46 if keepalive_servers and not keepalive_servers:contains(session.from_host) then return end
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47 session.watchdog_keepalive = watchdog.new(keepalive_timeout, function ()
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48 session.log("info", "Keepalive ping timed out, closing connection");
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49 session:close("connection-timeout");
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50 end);
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51 end);
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52
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53 module:hook("s2sout-established", function (event)
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54 local session = event.session;
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55 if session.watchdog_keepalive then return end -- in case mod_bidi fires this twice
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56 if keepalive_servers and not keepalive_servers:contains(session.from_host) then return end
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57 session.watchdog_keepalive = watchdog.new(keepalive_timeout, function ()
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58 session.log("info", "Keepalive ping timed out, closing connection");
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59 session:close("connection-timeout");
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60 end);
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61 end);
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62
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63 module:hook("iq-result/host/keepalive", function (event)
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64 local origin = event.origin;
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65 if origin.watchdog_keepalive then
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66 origin.watchdog_keepalive:reset();
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67 end
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68 if s2sout[origin.from_host] and s2sout[origin.from_host].watchdog_keepalive then
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69 s2sout[origin.from_host].watchdog_keepalive:reset();
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70 end
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71 return true;
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72 end);
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73
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74 module:hook("iq-error/host/keepalive", function (event)
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75 local origin = event.origin;
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76 if origin.dummy then return end -- Probably a sendq bounce
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77
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78 if origin.type == "s2sin" or origin.type == "s2sout" then
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79 -- An error from the remote means connectivity is ok,
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80 -- so treat it the same as a result
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81 return module:fire_event("iq-result/host/keepalive", event);
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82 end
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83 end);
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84
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85 module:add_timer(keepalive_interval, send_pings);