513 lines
19 KiB
Python
513 lines
19 KiB
Python
# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: t -*-
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# vi: set ft=python sts=4 ts=4 sw=4 noet :
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# This file is part of Fail2Ban.
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#
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# Fail2Ban is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# Fail2Ban is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Fail2Ban; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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# Author: Daniel Black
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#
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__author__ = "Daniel Black"
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__copyright__ = "Copyright (c) 2013 Daniel Black"
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__license__ = "GPL"
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import time
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import os
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import tempfile
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from ..server.ticket import FailTicket
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from ..server.utils import Utils
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from .dummyjail import DummyJail
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from .utils import LogCaptureTestCase, with_alt_time, with_tmpdir, MyTime
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TEST_FILES_DIR = os.path.join(os.path.dirname(__file__), "files")
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class ExecuteActions(LogCaptureTestCase):
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def setUp(self):
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"""Call before every test case."""
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super(ExecuteActions, self).setUp()
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self.__jail = DummyJail()
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self.__actions = self.__jail.actions
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def tearDown(self):
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super(ExecuteActions, self).tearDown()
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def defaultAction(self, o={}):
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self.__actions.add('ip')
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act = self.__actions['ip']
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act.actionstart = 'echo ip start'+o.get('start', '')
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act.actionban = 'echo ip ban <ip>'+o.get('ban', '')
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act.actionunban = 'echo ip unban <ip>'+o.get('unban', '')
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act.actioncheck = 'echo ip check'+o.get('check', '')
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act.actionflush = 'echo ip flush'+o.get('flush', '')
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act.actionstop = 'echo ip stop'+o.get('stop', '')
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return act
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def testActionsAddDuplicateName(self):
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self.__actions.add('test')
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self.assertRaises(ValueError, self.__actions.add, 'test')
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def testActionsManipulation(self):
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self.__actions.add('test')
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self.assertTrue(self.__actions['test'])
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self.assertIn('test', self.__actions)
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self.assertNotIn('nonexistent action', self.__actions)
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self.__actions.add('test1')
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del self.__actions['test']
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del self.__actions['test1']
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self.assertNotIn('test', self.__actions)
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self.assertEqual(len(self.__actions), 0)
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self.__actions.setBanTime(127)
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self.assertEqual(self.__actions.getBanTime(),127)
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self.assertRaises(ValueError, self.__actions.removeBannedIP, '127.0.0.1')
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def testAddBannedIP(self):
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self.assertEqual(self.__actions.addBannedIP('192.0.2.1'), 1)
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self.assertLogged('Ban 192.0.2.1')
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self.pruneLog()
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self.assertEqual(self.__actions.addBannedIP(['192.0.2.1', '192.0.2.2', '192.0.2.3']), 2)
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self.assertLogged('192.0.2.1 already banned')
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self.assertNotLogged('Ban 192.0.2.1')
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self.assertLogged('Ban 192.0.2.2')
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self.assertLogged('Ban 192.0.2.3')
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def testActionsOutput(self):
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self.defaultAction()
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self.__actions.start()
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self.assertLogged("stdout: %r" % 'ip start', wait=True)
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self.__actions.stop()
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self.__actions.join()
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self.assertLogged("stdout: %r" % 'ip flush', "stdout: %r" % 'ip stop')
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self.assertEqual(self.__actions.status(),[("Currently banned", 0 ),
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("Total banned", 0 ), ("Banned IP list", [] )])
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self.assertEqual(self.__actions.status('short'),[("Currently banned", 0 ),
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("Total banned", 0 )])
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def testAddActionPython(self):
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self.__actions.add(
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"Action", os.path.join(TEST_FILES_DIR, "action.d/action.py"),
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{'opt1': 'value'})
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self.assertLogged("TestAction initialised")
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self.__actions.start()
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self.assertTrue( Utils.wait_for(lambda: self._is_logged("TestAction action start"), 3) )
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self.__actions.stop()
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self.__actions.join()
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self.assertLogged("TestAction action stop")
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self.assertRaises(IOError,
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self.__actions.add, "Action3", "/does/not/exist.py", {})
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# With optional argument
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self.__actions.add(
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"Action4", os.path.join(TEST_FILES_DIR, "action.d/action.py"),
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{'opt1': 'value', 'opt2': 'value2'})
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# With too many arguments
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self.assertRaises(
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TypeError, self.__actions.add, "Action5",
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os.path.join(TEST_FILES_DIR, "action.d/action.py"),
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{'opt1': 'value', 'opt2': 'value2', 'opt3': 'value3'})
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# Missing required argument
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self.assertRaises(
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TypeError, self.__actions.add, "Action5",
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os.path.join(TEST_FILES_DIR, "action.d/action.py"), {})
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def testAddPythonActionNOK(self):
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self.assertRaises(RuntimeError, self.__actions.add,
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"Action", os.path.join(TEST_FILES_DIR,
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"action.d/action_noAction.py"),
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{})
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self.assertRaises(RuntimeError, self.__actions.add,
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"Action", os.path.join(TEST_FILES_DIR,
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"action.d/action_nomethod.py"),
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{})
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self.__actions.add(
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"Action", os.path.join(TEST_FILES_DIR,
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"action.d/action_errors.py"),
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{})
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self.__actions.start()
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self.assertTrue( Utils.wait_for(lambda: self._is_logged("Failed to start"), 3) )
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self.__actions.stop()
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self.__actions.join()
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self.assertLogged("Failed to stop")
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def testBanActionsAInfo(self):
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# Action which deletes IP address from aInfo
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self.__actions.add(
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"action1",
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os.path.join(TEST_FILES_DIR, "action.d/action_modifyainfo.py"),
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{})
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self.__actions.add(
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"action2",
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os.path.join(TEST_FILES_DIR, "action.d/action_modifyainfo.py"),
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{})
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self.__jail.putFailTicket(FailTicket("1.2.3.4"))
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self.__actions._Actions__checkBan()
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# Will fail if modification of aInfo from first action propagates
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# to second action, as both delete same key
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self.assertNotLogged("Failed to execute ban")
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self.assertLogged("action1 ban deleted aInfo IP")
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self.assertLogged("action2 ban deleted aInfo IP")
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self.__actions._Actions__flushBan()
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# Will fail if modification of aInfo from first action propagates
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# to second action, as both delete same key
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self.assertNotLogged("Failed to execute unban")
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self.assertLogged("action1 unban deleted aInfo IP")
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self.assertLogged("action2 unban deleted aInfo IP")
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@with_alt_time
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def testUnbanOnBusyBanBombing(self):
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# check unban happens in-between of "ban bombing" despite lower precedence,
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# if it is not work, we'll not see "Unbanned 30" (rather "Unbanned 50")
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# because then all the unbans occur earliest at flushing (after stop)
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# each 3rd ban we should see an unban check (and up to 5 tickets gets unbanned):
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self.__actions.banPrecedence = 3
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self.__actions.unbanMaxCount = 5
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self.__actions.setBanTime(100)
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self.__actions.start()
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MyTime.setTime(0); # avoid "expired bantime" (in 0.11)
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i = 0
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while i < 20:
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ip = "192.0.2.%d" % i
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self.__jail.putFailTicket(FailTicket(ip, 0))
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i += 1
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# wait for last ban (all 20 tickets gets banned):
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self.assertLogged(' / 20,', wait=True)
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MyTime.setTime(200); # unban time for 20 tickets reached
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while i < 50:
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ip = "192.0.2.%d" % i
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self.__jail.putFailTicket(FailTicket(ip, 200))
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i += 1
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# wait for last ban (all 50 tickets gets banned):
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self.assertLogged(' / 50,', wait=True)
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self.__actions.stop()
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self.__actions.join()
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self.assertLogged('Unbanned 30, 0 ticket(s)')
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self.assertNotLogged('Unbanned 50, 0 ticket(s)')
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def testActionsConsistencyCheck(self):
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act = self.defaultAction({'check':' <family>', 'flush':' <family>'})
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# flush for inet6 is intentionally "broken" here - test no unhandled except and invariant check:
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act['actionflush?family=inet6'] = act.actionflush + '; exit 1'
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act.actionstart_on_demand = True
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# force errors via check in ban/unban:
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act.actionban = "<actioncheck> ; " + act.actionban
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act.actionunban = "<actioncheck> ; " + act.actionunban
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self.__actions.start()
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self.assertNotLogged("stdout: %r" % 'ip start')
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self.assertEqual(self.__actions.addBannedIP('192.0.2.1'), 1)
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self.assertEqual(self.__actions.addBannedIP('2001:db8::1'), 1)
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self.assertLogged('Ban 192.0.2.1', 'Ban 2001:db8::1',
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"stdout: %r" % 'ip start',
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"stdout: %r" % 'ip ban 192.0.2.1',
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"stdout: %r" % 'ip ban 2001:db8::1',
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all=True, wait=True)
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# check should fail (so cause stop/start):
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self.pruneLog('[test-phase 1a] simulate inconsistent irreparable env by unban')
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act['actioncheck?family=inet6'] = act.actioncheck + '; exit 1'
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self.__actions.removeBannedIP('2001:db8::1')
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self.assertLogged('Invariant check failed. Unban is impossible.',
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wait=True)
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self.pruneLog('[test-phase 1b] simulate inconsistent irreparable env by flush')
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self.__actions._Actions__flushBan()
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self.assertLogged(
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"stdout: %r" % 'ip flush inet4',
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"stdout: %r" % 'ip flush inet6',
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'Failed to flush bans',
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'No flush occurred, do consistency check',
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'Invariant check failed. Trying to restore a sane environment',
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"stdout: %r" % 'ip stop', # same for both families
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'Failed to flush bans',
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all=True, wait=True)
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# check succeeds:
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self.pruneLog('[test-phase 2] consistent env')
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act['actioncheck?family=inet6'] = act.actioncheck
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self.assertEqual(self.__actions.addBannedIP('2001:db8::1'), 1)
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self.assertLogged('Ban 2001:db8::1',
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"stdout: %r" % 'ip start', # same for both families
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"stdout: %r" % 'ip ban 2001:db8::1',
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all=True, wait=True)
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self.assertNotLogged("stdout: %r" % 'ip check inet4',
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all=True)
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self.pruneLog('[test-phase 3] failed flush in consistent env')
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self.__actions._Actions__flushBan()
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self.assertLogged('Failed to flush bans',
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'No flush occurred, do consistency check',
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"stdout: %r" % 'ip flush inet6',
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"stdout: %r" % 'ip check inet6',
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all=True, wait=True)
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self.assertNotLogged(
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"stdout: %r" % 'ip flush inet4',
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"stdout: %r" % 'ip stop',
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"stdout: %r" % 'ip start',
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'Unable to restore environment',
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all=True)
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# stop, flush succeeds:
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self.pruneLog('[test-phase end] flush successful')
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act['actionflush?family=inet6'] = act.actionflush
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self.__actions.stop()
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self.__actions.join()
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self.assertLogged(
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"stdout: %r" % 'ip flush inet6',
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"stdout: %r" % 'ip stop', # same for both families
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'action ip terminated',
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all=True, wait=True)
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# no flush for inet4 (already successfully flushed):
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self.assertNotLogged("ERROR",
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"stdout: %r" % 'ip flush inet4',
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'Unban tickets each individually',
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all=True)
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def testActionsConsistencyCheckDiffFam(self):
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# same as testActionsConsistencyCheck, but different start/stop commands for both families and repair on unban
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act = self.defaultAction({'start':' <family>', 'check':' <family>', 'flush':' <family>', 'stop':' <family>'})
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# flush for inet6 is intentionally "broken" here - test no unhandled except and invariant check:
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act['actionflush?family=inet6'] = act.actionflush + '; exit 1'
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act.actionstart_on_demand = True
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act.actionrepair_on_unban = True
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# force errors via check in ban/unban:
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act.actionban = "<actioncheck> ; " + act.actionban
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act.actionunban = "<actioncheck> ; " + act.actionunban
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self.__actions.start()
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self.assertNotLogged("stdout: %r" % 'ip start')
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self.assertEqual(self.__actions.addBannedIP('192.0.2.1'), 1)
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self.assertEqual(self.__actions.addBannedIP('2001:db8::1'), 1)
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self.assertLogged('Ban 192.0.2.1', 'Ban 2001:db8::1',
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"stdout: %r" % 'ip start inet4',
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"stdout: %r" % 'ip ban 192.0.2.1',
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"stdout: %r" % 'ip start inet6',
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"stdout: %r" % 'ip ban 2001:db8::1',
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all=True, wait=True)
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# check should fail (so cause stop/start):
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act['actioncheck?family=inet6'] = act.actioncheck + '; exit 1'
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self.pruneLog('[test-phase 1a] simulate inconsistent irreparable env by unban')
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self.__actions.removeBannedIP('2001:db8::1')
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self.assertLogged('Invariant check failed. Trying to restore a sane environment',
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"stdout: %r" % 'ip stop inet6',
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all=True, wait=True)
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self.assertNotLogged(
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"stdout: %r" % 'ip start inet6', # start on demand (not on repair)
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"stdout: %r" % 'ip stop inet4', # family inet4 is not affected
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"stdout: %r" % 'ip start inet4',
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all=True)
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self.pruneLog('[test-phase 1b] simulate inconsistent irreparable env by ban')
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self.assertEqual(self.__actions.addBannedIP('2001:db8::1'), 1)
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self.assertLogged('Invariant check failed. Trying to restore a sane environment',
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"stdout: %r" % 'ip stop inet6',
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"stdout: %r" % 'ip start inet6',
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"stdout: %r" % 'ip check inet6',
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'Unable to restore environment',
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'Failed to execute ban',
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all=True, wait=True)
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self.assertNotLogged(
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"stdout: %r" % 'ip stop inet4', # family inet4 is not affected
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"stdout: %r" % 'ip start inet4',
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all=True)
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act['actioncheck?family=inet6'] = act.actioncheck
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self.assertEqual(self.__actions.addBannedIP('2001:db8::2'), 1)
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act['actioncheck?family=inet6'] = act.actioncheck + '; exit 1'
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self.pruneLog('[test-phase 1c] simulate inconsistent irreparable env by flush')
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self.__actions._Actions__flushBan()
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self.assertLogged(
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"stdout: %r" % 'ip flush inet4',
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"stdout: %r" % 'ip flush inet6',
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'Failed to flush bans',
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'No flush occurred, do consistency check',
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'Invariant check failed. Trying to restore a sane environment',
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"stdout: %r" % 'ip stop inet6',
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'Failed to flush bans in jail',
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all=True, wait=True)
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# start/stop should be called for inet6 only:
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self.assertNotLogged(
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"stdout: %r" % 'ip stop inet4',
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all=True)
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# check succeeds:
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self.pruneLog('[test-phase 2] consistent env')
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act['actioncheck?family=inet6'] = act.actioncheck
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self.assertEqual(self.__actions.addBannedIP('2001:db8::1'), 1)
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self.assertLogged('Ban 2001:db8::1',
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"stdout: %r" % 'ip start inet6',
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"stdout: %r" % 'ip ban 2001:db8::1',
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all=True, wait=True)
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self.assertNotLogged(
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"stdout: %r" % 'ip check inet4',
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"stdout: %r" % 'ip start inet4',
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all=True)
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self.pruneLog('[test-phase 3] failed flush in consistent env')
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act['actioncheck?family=inet6'] = act.actioncheck
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self.__actions._Actions__flushBan()
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self.assertLogged('Failed to flush bans',
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'No flush occurred, do consistency check',
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"stdout: %r" % 'ip flush inet6',
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"stdout: %r" % 'ip check inet6',
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all=True, wait=True)
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self.assertNotLogged(
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"stdout: %r" % 'ip flush inet4',
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"stdout: %r" % 'ip stop inet4',
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"stdout: %r" % 'ip start inet4',
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"stdout: %r" % 'ip stop inet6',
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"stdout: %r" % 'ip start inet6',
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all=True)
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# stop, flush succeeds:
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self.pruneLog('[test-phase end] flush successful')
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act['actionflush?family=inet6'] = act.actionflush
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self.__actions.stop()
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self.__actions.join()
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self.assertLogged(
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"stdout: %r" % 'ip flush inet6',
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"stdout: %r" % 'ip stop inet4',
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"stdout: %r" % 'ip stop inet6',
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'action ip terminated',
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all=True, wait=True)
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# no flush for inet4 (already successfully flushed):
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self.assertNotLogged("ERROR",
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"stdout: %r" % 'ip flush inet4',
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'Unban tickets each individually',
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all=True)
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@with_alt_time
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@with_tmpdir
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def testActionsRebanBrokenAfterRepair(self, tmp):
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act = self.defaultAction({
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'start':' <family>; touch "<FN>"',
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'check':' <family>; test -f "<FN>"',
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'flush':' <family>; echo -n "" > "<FN>"',
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'stop': ' <family>; rm -f "<FN>"',
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'ban': ' <family>; echo "<ip> <family>" >> "<FN>"',
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})
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act['FN'] = tmp+'/<family>'
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act.actionstart_on_demand = True
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act.actionrepair = 'echo ip repair <family>; touch "<FN>"'
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act.actionreban = 'echo ip reban <ip> <family>; echo "<ip> <family> -- rebanned" >> "<FN>"'
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self.pruneLog('[test-phase 0] initial ban')
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self.assertEqual(self.__actions.addBannedIP(['192.0.2.1', '2001:db8::1']), 2)
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self.assertLogged('Ban 192.0.2.1', 'Ban 2001:db8::1',
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"stdout: %r" % 'ip start inet4',
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"stdout: %r" % 'ip ban 192.0.2.1 inet4',
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"stdout: %r" % 'ip start inet6',
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"stdout: %r" % 'ip ban 2001:db8::1 inet6',
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all=True)
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self.pruneLog('[test-phase 1] check ban')
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self.dumpFile(tmp+'/inet4')
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self.assertLogged('192.0.2.1 inet4')
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self.assertNotLogged('2001:db8::1 inet6')
|
|
self.pruneLog()
|
|
self.dumpFile(tmp+'/inet6')
|
|
self.assertLogged('2001:db8::1 inet6')
|
|
self.assertNotLogged('192.0.2.1 inet4')
|
|
|
|
# simulate 3 seconds past:
|
|
MyTime.setTime(MyTime.time() + 4)
|
|
# already banned produces events:
|
|
self.pruneLog('[test-phase 2] check already banned')
|
|
self.assertEqual(self.__actions.addBannedIP(['192.0.2.1', '2001:db8::1', '2001:db8::2']), 1)
|
|
self.assertLogged(
|
|
'192.0.2.1 already banned', '2001:db8::1 already banned', 'Ban 2001:db8::2',
|
|
"stdout: %r" % 'ip check inet4', # both checks occurred
|
|
"stdout: %r" % 'ip check inet6',
|
|
all=True)
|
|
self.dumpFile(tmp+'/inet4')
|
|
self.dumpFile(tmp+'/inet6')
|
|
# no reban should occur:
|
|
self.assertNotLogged('Reban 192.0.2.1', 'Reban 2001:db8::1',
|
|
"stdout: %r" % 'ip ban 192.0.2.1 inet4',
|
|
"stdout: %r" % 'ip reban 192.0.2.1 inet4',
|
|
"stdout: %r" % 'ip ban 2001:db8::1 inet6',
|
|
"stdout: %r" % 'ip reban 2001:db8::1 inet6',
|
|
'192.0.2.1 inet4 -- repaired',
|
|
'2001:db8::1 inet6 -- repaired',
|
|
all=True)
|
|
|
|
# simulate 3 seconds past:
|
|
MyTime.setTime(MyTime.time() + 4)
|
|
# break env (remove both files, so check would fail):
|
|
os.remove(tmp+'/inet4')
|
|
os.remove(tmp+'/inet6')
|
|
# test again already banned (it shall cause reban now):
|
|
self.pruneLog('[test-phase 3a] check reban after sane env repaired')
|
|
self.assertEqual(self.__actions.addBannedIP(['192.0.2.1', '2001:db8::1']), 2)
|
|
self.assertLogged(
|
|
"Invariant check failed. Trying to restore a sane environment",
|
|
"stdout: %r" % 'ip repair inet4', # both repairs occurred
|
|
"stdout: %r" % 'ip repair inet6',
|
|
"Reban 192.0.2.1, action 'ip'", "Reban 2001:db8::1, action 'ip'", # both rebans also
|
|
"stdout: %r" % 'ip reban 192.0.2.1 inet4',
|
|
"stdout: %r" % 'ip reban 2001:db8::1 inet6',
|
|
all=True)
|
|
|
|
# now last IP (2001:db8::2) - no repair, but still old epoch of ticket, so it gets rebanned:
|
|
self.pruneLog('[test-phase 3a] check reban by epoch mismatch (without repair)')
|
|
self.assertEqual(self.__actions.addBannedIP('2001:db8::2'), 1)
|
|
self.assertLogged(
|
|
"Reban 2001:db8::2, action 'ip'",
|
|
"stdout: %r" % 'ip reban 2001:db8::2 inet6',
|
|
all=True)
|
|
self.assertNotLogged(
|
|
"Invariant check failed. Trying to restore a sane environment",
|
|
"stdout: %r" % 'ip repair inet4', # both repairs occurred
|
|
"stdout: %r" % 'ip repair inet6',
|
|
"Reban 192.0.2.1, action 'ip'", "Reban 2001:db8::1, action 'ip'", # both rebans also
|
|
"stdout: %r" % 'ip reban 192.0.2.1 inet4',
|
|
"stdout: %r" % 'ip reban 2001:db8::1 inet6',
|
|
all=True)
|
|
|
|
# and bans present in files:
|
|
self.pruneLog('[test-phase 4] check reban')
|
|
self.dumpFile(tmp+'/inet4')
|
|
self.assertLogged('192.0.2.1 inet4 -- rebanned')
|
|
self.assertNotLogged('2001:db8::1 inet6 -- rebanned')
|
|
self.pruneLog()
|
|
self.dumpFile(tmp+'/inet6')
|
|
self.assertLogged(
|
|
'2001:db8::1 inet6 -- rebanned',
|
|
'2001:db8::2 inet6 -- rebanned', all=True)
|
|
self.assertNotLogged('192.0.2.1 inet4 -- rebanned')
|
|
|
|
# coverage - intended error in reban (no unhandled exception, message logged):
|
|
act.actionreban = ''
|
|
act.actionban = 'exit 1'
|
|
self.assertEqual(self.__actions._Actions__reBan(FailTicket("192.0.2.1", 0)), 0)
|
|
self.assertLogged(
|
|
'Failed to execute reban',
|
|
'Error banning 192.0.2.1', all=True)
|