# 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
# 
# $Revision$

__author__ = "Cyril Jaquier"
__version__ = "$Revision$"
__date__ = "$Date$"
__copyright__ = "Copyright (c) 2004 Cyril Jaquier"
__license__ = "GPL"

import time, re

class Parser:
    """ This class is the main log parser class. It should be inherited
        by all the service specific classes.
    """
    
    def getLogMatch(self, pattern, line):
        """ Returns a match if pattern is found in line.
        """
        return re.search(pattern, line)
        
    def getLogIPv4(self, line):
        """ Returns IP if one is found in line. Match IPv4 string.
        """
        matchIP = re.search("(?:\d{1,3}\.){3}\d{1,3}", line)
        if matchIP:
            return matchIP.group()
        else:
            return None
        
    def getLogIP(self, line):
        """ Returns IP if one is found in line.
        """
        return self.getLogIPv4(line)
    
    def getLogTimeStandard(self, line):
        """ Returns the log time of line using a standard log format.
            
            Format: Oct 14 11:47:08
        """
        date = list(time.strptime(line[0:15], "%b %d %H:%M:%S"))
        date[0] = time.gmtime()[0]
        unixTime = time.mktime(date)
        return unixTime
        
    def getLogTime(self, line):
        """ Returns the log time of line.
        """
        return self.getLogTimeStandard(line)