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123 lines
3.2 KiB
123 lines
3.2 KiB
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# Author: Cyril Jaquier
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#
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# $Revision$
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__author__ = "Cyril Jaquier"
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__version__ = "$Revision$"
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__date__ = "$Date$"
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__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
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__license__ = "GPL"
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import time, os, log4py, re
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from utils.process import executeCmd
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# Gets the instance of log4py.
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logSys = log4py.Logger().get_instance()
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class Firewall:
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""" Manages the ban list and executes the command that ban
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the IP.
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"""
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banList = dict()
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def __init__(self, banRule, unBanRule, banTime):
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self.banRule = banRule
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self.unBanRule = unBanRule
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self.banTime = banTime
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def addBanIP(self, aInfo, debug):
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""" Bans an IP.
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"""
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ip = aInfo["ip"]
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if not self.inBanList(ip):
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crtTime = time.time()
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logSys.warn("Ban " + ip)
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self.banList[ip] = crtTime
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aInfo["bantime"] = crtTime
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executeCmd(self.banIP(aInfo), debug)
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else:
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logSys.error(ip+" already in ban list")
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def delBanIP(self, aInfo, debug):
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""" Unban an IP.
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"""
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ip = aInfo["ip"]
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if self.inBanList(ip):
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logSys.warn("Unban "+ip)
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del self.banList[ip]
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executeCmd(self.unBanIP(aInfo), debug)
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else:
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logSys.error(ip+" not in ban list")
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def inBanList(self, ip):
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""" Checks if IP is in ban list.
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"""
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return self.banList.has_key(ip)
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def checkForUnBan(self, debug):
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""" Check for IP to remove from ban list.
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"""
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banListTemp = self.banList.copy()
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for element in banListTemp.iteritems():
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btime = element[1]
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if btime < time.time()-self.banTime:
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aInfo = {"ip": element[0],
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"bantime": btime,
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"unbantime": time.time()}
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self.delBanIP(aInfo, debug)
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def flushBanList(self, debug):
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""" Flushes the ban list and of course the firewall rules.
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Called when fail2ban exits.
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"""
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banListTemp = self.banList.copy()
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for element in banListTemp.iteritems():
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aInfo = {"ip": element[0],
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"bantime": element[1],
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"unbantime": time.time()}
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self.delBanIP(aInfo, debug)
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def banIP(self, aInfo):
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""" Returns query to ban IP.
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"""
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query = self.replaceTag(self.banRule, aInfo)
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return query
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def unBanIP(self, aInfo):
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""" Returns query to unban IP.
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"""
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query = self.replaceTag(self.unBanRule, aInfo)
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return query
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def replaceTag(self, query, aInfo):
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""" Replace tags in query
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"""
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string = query
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for tag in aInfo:
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string = string.replace('<'+tag+'>', `aInfo[tag]`)
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return string
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def viewBanList(self):
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""" Prints the ban list on screen. Usefull for debugging.
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"""
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for element in self.banList.iteritems():
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print element
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