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# This file is part of Fail2Ban.
#
# Fail2Ban is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Fail2Ban is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Fail2Ban; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# Author: Cyril Jaquier
#
# $Revision: 454 $
__author__ = "Cyril Jaquier"
__version__ = "$Revision: 454 $"
__date__ = "$Date: 2006-11-12 11:54:19 +0100 (Sun, 12 Nov 2006) $"
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
__license__ = "GPL"
from banticket import BanTicket
from threading import Lock
from mytime import MyTime
import logging
# Gets the instance of the logger.
logSys = logging.getLogger("fail2ban.action")
##
# Banning Manager.
#
# Manage the banned IP addresses. Convert FailTicket to BanTicket.
# This class is mainly used by the Action class.
class BanManager:
##
# Constructor.
#
# Initialize members with default values.
def __init__(self):
## Mutex used to protect the ban list.
self.__lock = Lock()
## The ban list.
self.__banList = list()
## The amount of time an IP address gets banned.
self.__banTime = 600
## Total number of banned IP address
self.__banTotal = 0
##
# Set the ban time.
#
# Set the amount of time an IP address get banned.
# @param value the time
def setBanTime(self, value):
self.__lock.acquire()
self.__banTime = int(value)
self.__lock.release()
##
# Get the ban time.
#
# Get the amount of time an IP address get banned.
# @return the time
def getBanTime(self):
try:
self.__lock.acquire()
return self.__banTime
finally:
self.__lock.release()
##
# Set the total number of banned address.
#
# @param value total number
def setBanTotal(self, value):
self.__lock.acquire()
self.__banTotal = value
self.__lock.release()
##
# Get the total number of banned address.
#
# @return the total number
def getBanTotal(self):
try:
self.__lock.acquire()
return self.__banTotal
finally:
self.__lock.release()
##
# Create a ban ticket.
#
# Create a BanTicket from a FailTicket. The timestamp of the BanTicket
# is the current time. This is a static method.
# @param ticket the FailTicket
# @return a BanTicket
@staticmethod
def createBanTicket(ticket):
ip = ticket.getIP()
#lastTime = ticket.getTime()
lastTime = MyTime.time()
banTicket = BanTicket(ip, lastTime)
banTicket.setAttempt(ticket.getAttempt())
return banTicket
##
# Add a ban ticket.
#
# Add a BanTicket instance into the ban list.
# @param ticket the ticket
# @return True if the IP address is not in the ban list
def addBanTicket(self, ticket):
try:
self.__lock.acquire()
if not self.__inBanList(ticket):
self.__banList.append(ticket)
self.__banTotal += 1
return True
return False
finally:
self.__lock.release()
##
# Get the size of the ban list.
#
# @return the size
def size(self):
try:
self.__lock.acquire()
return len(self.__banList)
finally:
self.__lock.release()
##
# Check if a ticket is in the list.
#
# Check if a BanTicket with a given IP address is already in the
# ban list.
# @param ticket the ticket
# @return True if a ticket already exists
def __inBanList(self, ticket):
for i in self.__banList:
if ticket.getIP() == i.getIP():
return True
return False
##
# Get the list of IP address to unban.
#
# Return a list of BanTicket which need to be unbanned.
# @param time the time
# @return the list of ticket to unban
def unBanList(self, time):
try:
self.__lock.acquire()
# Permanent banning
if self.__banTime < 0:
return list()
# Gets the list of ticket to remove.
unBanList = [ticket for ticket in self.__banList
if ticket.getTime() < time - self.__banTime]
# Removes tickets.
self.__banList = [ticket for ticket in self.__banList
if ticket not in unBanList]
return unBanList
finally:
self.__lock.release()
##
# Flush the ban list.
#
# Get the ban list and initialize it with an empty one.
# @return the complete ban list
def flushBanList(self):
try:
self.__lock.acquire()
uBList = self.__banList
self.__banList = list()
return uBList
finally:
self.__lock.release()
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