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/
usr/
share/
fail2ban/
server/
- drwxr-xr-x
|
Viewing file:  actions.py (5.38 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
# 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: 567 $
__author__ = "Cyril Jaquier"
__version__ = "$Revision: 567 $"
__date__ = "$Date: 2007-03-26 23:17:31 +0200 (Mon, 26 Mar 2007) $"
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
__license__ = "GPL"
from banmanager import BanManager
from jailthread import JailThread
from action import Action
from mytime import MyTime
import time, logging
# Gets the instance of the logger.
logSys = logging.getLogger("fail2ban.actions")
##
# Execute commands.
#
# This class reads the failures from the Jail queue and decide if an
# action has to be taken. A BanManager take care of the banned IP
# addresses.
class Actions(JailThread):
##
# Constructor.
#
# Initialize the filter object with default values.
# @param jail the jail object
def __init__(self, jail):
JailThread.__init__(self)
## The jail which contains this action.
self.jail = jail
self.__actions = list()
## The ban manager.
self.__banManager = BanManager()
##
# Adds an action.
#
# @param name The action name
def addAction(self, name):
action = Action(name)
self.__actions.append(action)
##
# Removes an action.
#
# @param name The action name
def delAction(self, name):
for action in self.__actions:
if action.getName() == name:
self.__actions.remove(action)
break
##
# Returns an action.
#
# Raises a KeyError exception if the action does not exist.
#
# @param name the action name
# @return the action
def getAction(self, name):
for action in self.__actions:
if action.getName() == name:
return action
raise KeyError
##
# Returns the last defined action.
#
# @return The last defined action.
def getLastAction(self):
action = self.__actions.pop()
self.__actions.append(action)
return action
##
# Set the ban time.
#
# @param value the time
def setBanTime(self, value):
self.__banManager.setBanTime(value)
logSys.info("Set banTime = %s" % value)
##
# Get the ban time.
#
# @return the time
def getBanTime(self):
return self.__banManager.getBanTime()
##
# Main loop.
#
# This function is the main loop of the thread. It checks the Jail
# queue and executes commands when an IP address is banned.
# @return True when the thread exits nicely
def run(self):
self.setActive(True)
for action in self.__actions:
action.execActionStart()
while self._isActive():
if not self.getIdle():
#logSys.debug(self.jail.getName() + ": action")
ret = self.__checkBan()
if not ret:
self.__checkUnBan()
time.sleep(self.getSleepTime())
else:
time.sleep(self.getSleepTime())
self.__flushBan()
for action in self.__actions:
action.execActionStop()
logSys.debug(self.jail.getName() + ": action terminated")
return True
##
# Check for IP address to ban.
#
# Look in the Jail queue for FailTicket. If a ticket is available,
# it executes the "ban" command and add a ticket to the BanManager.
# @return True if an IP address get banned
def __checkBan(self):
ticket = self.jail.getFailTicket()
if ticket != False:
aInfo = dict()
bTicket = BanManager.createBanTicket(ticket)
aInfo["ip"] = bTicket.getIP()
aInfo["failures"] = bTicket.getAttempt()
aInfo["time"] = bTicket.getTime()
if self.__banManager.addBanTicket(bTicket):
logSys.warn("[%s] Ban %s" % (self.jail.getName(), aInfo["ip"]))
for action in self.__actions:
action.execActionBan(aInfo)
return True
else:
logSys.warn("[%s] %s already banned" % (self.jail.getName(),
aInfo["ip"]))
return False
##
# Check for IP address to unban.
#
# Unban IP address which are outdated.
def __checkUnBan(self):
for ticket in self.__banManager.unBanList(MyTime.time()):
self.__unBan(ticket)
##
# Flush the ban list.
#
# Unban all IP address which are still in the banning list.
def __flushBan(self):
logSys.debug("Flush ban list")
for ticket in self.__banManager.flushBanList():
self.__unBan(ticket)
##
# Unbans host corresponding to the ticket.
#
# Executes the actions in order to unban the host given in the
# ticket.
def __unBan(self, ticket):
aInfo = dict()
aInfo["ip"] = ticket.getIP()
aInfo["failures"] = ticket.getAttempt()
aInfo["time"] = ticket.getTime()
logSys.warn("[%s] Unban %s" % (self.jail.getName(), aInfo["ip"]))
for action in self.__actions:
action.execActionUnban(aInfo)
##
# Get the status of the filter.
#
# Get some informations about the filter state such as the total
# number of failures.
# @return a list with tuple
def status(self):
ret = [("Currently banned", self.__banManager.size()),
("Total banned", self.__banManager.getBanTotal()),
("IP list", self.__banManager.getBanList())]
return ret
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