#!/usr/bin/python
#
# Copyright 2011 Google Inc. All Rights Reserved
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

"""Command line interface to aclcheck library."""

__author__ = 'watson@google.com (Tony Watson)'

from optparse import OptionParser
import sys
from lib import aclcheck
from lib import policy
from lib import naming


def main():
  usage = "usage: %prog [options] arg"
  _parser = OptionParser(usage)
  _parser.add_option('--definitions-directory', dest='definitions',
                     help='definitions directory', default='./def')
  _parser.add_option('-p', '--policy-file', dest='pol',
                     help='policy file', default='./policies/sample.pol')
  _parser.add_option('-d', '--destination', dest='dst',
                     help='destination IP', default='200.1.1.1')
  _parser.add_option('-s' ,'--source', dest='src',
                     help='source IP', default='any')
  _parser.add_option('--proto', '--protocol', dest='proto',
                     help='Protocol (tcp, udp, icmp, etc.)', default='tcp')
  _parser.add_option('--dport', '--destination-port', dest='dport',
                     help='destination port', default='80')
  _parser.add_option('--sport', '--source-port', dest='sport',
                     help='source port', default='1025')
  (FLAGS, args) = _parser.parse_args()
  #if FLAGS.help:
  #  print _parser.format_help()

  defs = naming.Naming(FLAGS.definitions)
  policy_obj = policy.ParsePolicy(open(FLAGS.pol).read(), defs)
  check = aclcheck.AclCheck(policy_obj, src=FLAGS.src, dst=FLAGS.dst,
                            sport=FLAGS.sport, dport=FLAGS.dport,
                            proto=FLAGS.proto)
  print str(check)

if __name__ == '__main__':
  main()