+
−local st = require "util.stanza";
+
−local watchdog = require "util.watchdog";
+
−local dt = require "util.datetime";
+
−
+
−local keepalive_servers = module:get_option_set("keepalive_servers");
+
−local keepalive_interval = module:get_option_number("keepalive_interval", 60);
+
−local keepalive_timeout = module:get_option_number("keepalive_timeout", 593);
+
−
+
−local host = module.host;
+
−local s2sout = prosody.hosts[host].s2sout;
+
−
+
−local function send_pings()
+
−	local ping_hosts = {};
+
−
+
−	for remote_domain, session in pairs(s2sout) do
+
−		if session.type ~= "s2sout_unauthed"
+
−		and (not(keepalive_servers) or keepalive_servers:contains(remote_domain)) then
+
−			session.sends2s(st.iq({ to = remote_domain, type = "get", from = host, id = "keepalive:"..dt.datetime()})
+
−				:tag("ping", { xmlns = "urn:xmpp:ping" })
+
−			);
+
−		end
+
−	end
+
−
+
−	for session in pairs(prosody.incoming_s2s) do
+
−		if session.type ~= "s2sin_unauthed"
+
−		and not session.notopen
+
−		and session.to_host == host
+
−		and (not(keepalive_servers) or keepalive_servers:contains(session.from_host)) then
+
−			if not s2sout[session.from_host] then ping_hosts[session.from_host] = true; end
+
−			session.sends2s " ";
+
−			-- If the connection is dead, this should make it time out.
+
−		end
+
−	end
+
−
+
−	-- ping remotes we only have s2sin from
+
−	for remote_domain in pairs(ping_hosts) do
+
−		module:send(st.iq({ to = remote_domain, type = "get", from = host, id = "keepalive:"..dt.datetime() })
+
−			:tag("ping", { xmlns = "urn:xmpp:ping" })
+
−		);
+
−	end
+
−
+
−	return keepalive_interval;
+
−end
+
−
+
−module:hook("s2sin-established", function (event)
+
−	local session = event.session;
+
−	if session.watchdog_keepalive then return end -- in case mod_bidi fires this twice
+
−	if keepalive_servers and not keepalive_servers:contains(session.from_host) then return end
+
−	session.watchdog_keepalive = watchdog.new(keepalive_timeout, function ()
+
−		session.log("info", "Keepalive ping timed out, closing connection");
+
−		session:close("connection-timeout");
+
−	end);
+
−end);
+
−
+
−module:hook("s2sout-established", function (event)
+
−	local session = event.session;
+
−	if session.watchdog_keepalive then return end -- in case mod_bidi fires this twice
+
−	if keepalive_servers and not keepalive_servers:contains(session.from_host) then return end
+
−	session.watchdog_keepalive = watchdog.new(keepalive_timeout, function ()
+
−		session.log("info", "Keepalive ping timed out, closing connection");
+
−		session:close("connection-timeout");
+
−	end);
+
−end);
+
−
+
−module:hook("iq/host", function (event)
+
−	local stanza = event.stanza;
+
−	if stanza.attr.type ~= "result" and stanza.attr.type ~= "error" then
+
−		return -- not a reply iq stanza
+
−	end
+
−	if not (stanza.attr.id and stanza.attr.id:sub(1, #"keepalive:") == "keepalive:") then
+
−		return -- not a reply to this module
+
−	end
+
−	if stanza.attr.type == "error" then
+
−		local err = stanza:get_child("error");
+
−		local err_by = err and err.attr.by;
+
−		if err_by and prosody.hosts[err_by] then
+
−			return -- error produced by the local host
+
−		end
+
−	end
+
−
+
−	local origin = event.origin;
+
−	if origin.dummy then return end -- Probably a sendq bounce
+
−	if origin.watchdog_keepalive then
+
−		origin.log("debug", "Resetting keepalive watchdog")
+
−		origin.watchdog_keepalive:reset();
+
−	end
+
−	if s2sout[origin.from_host] and s2sout[origin.from_host].watchdog_keepalive then
+
−		s2sout[origin.from_host].watchdog_keepalive:reset();
+
−	end
+
−	return true;
+
−end);
+
−
+
−module:add_timer(keepalive_interval, send_pings);