108 lines
2.7 KiB
Python
108 lines
2.7 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__ = "Cyril Jaquier, Yaroslav Halchenko"
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__copyright__ = "Copyright (c) 2004 Cyril Jaquier, 2013- Yaroslav Halchenko"
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__license__ = "GPL"
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from threading import Lock
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try:
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from collections.abc import Mapping
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except ImportError:
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from collections import Mapping
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from ..exceptions import DuplicateJailException, UnknownJailException
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from .jail import Jail
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class Jails(Mapping):
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"""Handles the jails.
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This class handles the jails. Creation, deletion or access to a jail
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must be done through this class. This class is thread-safe which is
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not the case of the jail itself, including filter and actions. This
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class is based on Mapping type, and the `add` method must be used to
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add additional jails.
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"""
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def __init__(self):
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self.__lock = Lock()
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self._jails = dict()
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def add(self, name, backend, db=None):
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"""Adds a jail.
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Adds a new jail if not already present which should use the
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given backend.
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Parameters
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----------
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name : str
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The name of the jail.
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backend : str
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The backend to use.
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db : Fail2BanDb
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Fail2Ban's persistent database instance.
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Raises
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------
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DuplicateJailException
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If jail name is already present.
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"""
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with self.__lock:
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if name in self._jails:
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raise DuplicateJailException(name)
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else:
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self._jails[name] = Jail(name, backend, db)
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def exists(self, name):
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return name in self._jails
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def __getitem__(self, name):
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try:
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self.__lock.acquire()
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return self._jails[name]
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except KeyError:
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raise UnknownJailException(name)
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finally:
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self.__lock.release()
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def __delitem__(self, name):
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try:
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self.__lock.acquire()
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del self._jails[name]
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except KeyError:
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raise UnknownJailException(name)
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finally:
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self.__lock.release()
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def __len__(self):
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try:
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self.__lock.acquire()
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return len(self._jails)
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finally:
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self.__lock.release()
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def __iter__(self):
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try:
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self.__lock.acquire()
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return iter(self._jails)
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finally:
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self.__lock.release()
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