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annotate mod_s2s_idle_timeout/mod_s2s_idle_timeout.lua @ 5243:d5dc8edb2695

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mod_http_oauth2: Use more compact IDs UUIDs are nice but so verbose! The reduction in entropy for the nonce should be fine since the timestamp is also counts towards this, and it changes every second (modulo clock shenanigans), so the chances of someone managing to get the same client_secret by registering with the same information at the same time as another entity should be negligible.
author Kim Alvefur <zash@zash.se>
date Sat, 11 Mar 2023 22:46:27 +0100
parents 4e235e565693
children
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1 local now = os.time;
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2
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3 local s2smanager = require "core.s2smanager";
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4 local timer = require "util.timer";
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6 local s2s_sessions = setmetatable({}, { __mode = "kv" });
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8 local idle_timeout = module:get_option("s2s_idle_timeout") or 300;
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9 local check_interval = math.ceil(idle_timeout * 0.75);
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11 local function install_checks(session)
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12 if not session.last_received_time then
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13 session.last_received_time = now();
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14 if session.direction == "incoming" then
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15 local _data = session.data;
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16 function session.data(conn, data)
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17 session.last_received_time = now();
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18 return _data(conn, data);
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19 end
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20 else
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21 local _sends2s = session.sends2s;
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22 function session.sends2s(data)
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23 session.last_received_time = now();
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24 return _sends2s(data);
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25 end
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26 end
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27 s2s_sessions[session] = true;
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28 end
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29 end
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30
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31 module:hook("s2s-authenticated", function (event)
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32 install_checks(event.session);
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33 end);
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35 function check_idle_sessions(time)
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36 time = time or now();
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37 for session in pairs(s2s_sessions) do
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38 local last_received_time = session.last_received_time;
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39 if last_received_time and time - last_received_time > idle_timeout then
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40 module:log("debug", "Closing idle connection %s->%s",
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41 session.from_host or "(unknown)", session.to_host or "(unknown)");
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42 session:close(); -- Close-on-idle isn't an error
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43 s2s_sessions[session] = nil;
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44 end
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45 end
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46 return check_interval;
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47 end
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48 timer.add_task(check_interval, check_idle_sessions);
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50 function module.save()
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51 return { s2s_sessions = s2s_sessions };
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52 end
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54 function module.restore(data)
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55 s2s_sessions = setmetatable(data.s2s_sessions or {}, { __mode = "kv" });
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56 end