1390 	return module:context(localhost):send_iq(iq, nil, timeout):next(function (pong)

  1390 	local print = self.session.print;

  1391 	local function onchange(what)

  1392 		return function(event)

  1393 			local s2s_session = event.session;

  1394 			if (s2s_session.from_host == localhost and s2s_session.to_host == remotehost)

  1395 				or (s2s_session.to_host == localhost and s2s_session.from_host == remotehost) then

  1396 				local dir = available_columns.dir.mapper(s2s_session.direction, s2s_session);

  1397 				print(("Session %s (%s%s%s) %s (%gs)"):format(s2s_session.id, localhost, dir, remotehost, what,

  1398 					time.now() - time_start));

  1399 			end

  1400 		end

  1401 	end

  1402 	local oncreated = onchange("created");

  1403 	local onauthenticated = onchange("authenticated");

  1404 	local onestablished = onchange("established");

  1405 	local ondestroyed = onchange("destroyed");

  1406 	module:hook("s2s-created", oncreated, 1);

  1407 	module:context(localhost):hook("s2s-authenticated", onauthenticated, 1);

  1408 	module:hook("s2sout-established", onestablished, 1);

  1409 	module:hook("s2sin-established", onestablished, 1);

  1410 	module:hook("s2s-destroyed", ondestroyed, 1);

  1411 	return module:context(localhost):send_iq(iq, nil, timeout):finally(function()

  1412 		module:unhook("s2s-created", oncreated);

  1413 		module:context(localhost):unhook("s2s-authenticated", onauthenticated);

  1414 		module:unhook("s2sout-established", onestablished);

  1415 		module:unhook("s2sin-established", onestablished);

  1416 		module:unhook("s2s-destroyed", ondestroyed);

  1417 	end):next(function(pong)