#!/usr/bin/env python

# Copyright (c) 2008, Net Easy, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of Net Easy, Inc. nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY Net Easy, Inc. ''AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL Net Easy, Inc. BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# requires logcheck from ports

import re, os
from sys import argv

logfile = "/var/log/daemon"

class checker(object):
    def __init__(self):
        self.tarpit_count = 0
        self.tarpit_total = 0

    def __repr__(self):
        return "tarpit.value %s" % (self.tarpit_average())

    def tarpit_average(self):
        if self.tarpit_count > 0:
            return "%.1f" % (self.tarpit_total / self.tarpit_count)
        else:
            return 0

    def process_line(self, line):
        if re.search(' disconnected after ', line):
            self.tarpit_count += 1
            tarpit_time = re.sub('^.*after ','',re.sub(' second.*$','',line))
            self.tarpit_total += int(tarpit_time)

    def process_lines(self, file):
        for line in os.popen('logtail %s %s.tp.offset' % (file, file)).readlines():
            self.process_line(line)

if __name__ == "__main__":
    if len(argv) > 1 and argv[1] == 'config':
        print """graph_title spamd delay
graph_vlabel Average delay.
graph_category Mail
graph_info Average time spammers delayed by spamd
tarpit.label Average tarpit delay"""

    else:
        processor = checker()
        processor.process_lines(logfile)
        print processor

