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153 lines
4.4 KiB
153 lines
4.4 KiB
# 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: Cyril Jaquier
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__author__ = "Cyril Jaquier, Lee Clemens, Yaroslav Halchenko"
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__copyright__ = "Copyright (c) 2004 Cyril Jaquier, 2011-2012 Lee Clemens, 2012 Yaroslav Halchenko"
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__license__ = "GPL"
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import Queue, logging
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from actions import Actions
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# Gets the instance of the logger.
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logSys = logging.getLogger("fail2ban.jail")
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class Jail:
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#Known backends. Each backend should have corresponding __initBackend method
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_BACKENDS = ('pyinotify', 'gamin', 'polling')
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def __init__(self, name, backend = "auto"):
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self.__name = name
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self.__queue = Queue.Queue()
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self.__filter = None
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logSys.info("Creating new jail '%s'" % self.__name)
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self._setBackend(backend)
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def __repr__(self):
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return "%s(%r)" % (self.__class__.__name__, self.__name)
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def _setBackend(self, backend):
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backend = backend.lower() # to assure consistent matching
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backends = self._BACKENDS
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if backend != 'auto':
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# we have got strict specification of the backend to use
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if not (backend in self._BACKENDS):
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logSys.error("Unknown backend %s. Must be among %s or 'auto'"
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% (backend, backends))
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raise ValueError("Unknown backend %s. Must be among %s or 'auto'"
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% (backend, backends))
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# so explore starting from it till the 'end'
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backends = backends[backends.index(backend):]
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for b in backends:
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initmethod = getattr(self, '_init%s' % b.capitalize())
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try:
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initmethod()
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if backend != 'auto' and b != backend:
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logSys.warning("Could only initiated %r backend whenever "
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"%r was requested" % (b, backend))
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else:
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logSys.info("Initiated %r backend" % b)
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self.__action = Actions(self)
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return # we are done
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except ImportError, e:
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logSys.debug(
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"Backend %r failed to initialize due to %s" % (b, e))
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# log error since runtime error message isn't printed, INVALID COMMAND
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logSys.error(
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"Failed to initialize any backend for Jail %r" % self.__name)
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raise RuntimeError(
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"Failed to initialize any backend for Jail %r" % self.__name)
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def _initPolling(self):
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logSys.info("Jail '%s' uses poller" % self.__name)
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from filterpoll import FilterPoll
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self.__filter = FilterPoll(self)
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def _initGamin(self):
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# Try to import gamin
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import gamin
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logSys.info("Jail '%s' uses Gamin" % self.__name)
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from filtergamin import FilterGamin
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self.__filter = FilterGamin(self)
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def _initPyinotify(self):
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# Try to import pyinotify
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import pyinotify
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logSys.info("Jail '%s' uses pyinotify" % self.__name)
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from filterpyinotify import FilterPyinotify
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self.__filter = FilterPyinotify(self)
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def setName(self, name):
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self.__name = name
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def getName(self):
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return self.__name
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def getFilter(self):
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return self.__filter
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def getAction(self):
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return self.__action
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def putFailTicket(self, ticket):
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self.__queue.put(ticket)
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def getFailTicket(self):
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try:
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return self.__queue.get(False)
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except Queue.Empty:
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return False
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def start(self):
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self.__filter.start()
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self.__action.start()
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logSys.info("Jail '%s' started" % self.__name)
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def stop(self):
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self.__filter.stop()
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self.__action.stop()
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self.__filter.join()
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self.__action.join()
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logSys.info("Jail '%s' stopped" % self.__name)
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def isAlive(self):
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isAlive0 = self.__filter.isAlive()
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isAlive1 = self.__action.isAlive()
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return isAlive0 or isAlive1
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def setIdle(self, value):
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self.__filter.setIdle(value)
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self.__action.setIdle(value)
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def getIdle(self):
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return self.__filter.getIdle() or self.__action.getIdle()
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def getStatus(self):
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fStatus = self.__filter.status()
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aStatus = self.__action.status()
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ret = [("filter", fStatus),
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("action", aStatus)]
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return ret
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