#!/usr/bin/python2.7

# Copyright (c) 2016, Oracle and/or its affiliates. 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.

import os
from subprocess import CalledProcessError, check_call
import sys

import smf_include

from neutron.agent.solaris import packetfilter


def start():
    # verify paths are valid
    for f in sys.argv[2:4]:
        if not os.path.exists(f) or not os.access(f, os.R_OK):
            print '%s does not exist or is not readable' % f
            return smf_include.SMF_EXIT_ERR_CONFIG

    # Cleanup any security groups related PF rules
    pf = packetfilter.PacketFilter('_auto/neutron:ovs:agent')
    pf.remove_anchor_recursively()    

    cmd = "/usr/bin/pfexec /usr/lib/neutron/neutron-openvswitch-agent " \
        "--config-file %s --config-file %s" % tuple(sys.argv[2:4])
    smf_include.smf_subprocess(cmd)


def stop():
    try:
        # first kill the SMF contract
        check_call(["/usr/bin/pkill", "-c", sys.argv[2]])
    except CalledProcessError as err:
        print "failed to kill the SMF contract: %s" % err
        return smf_include.SMF_EXIT_ERR_FATAL

    # We need to remove the PF rules added under _auto/neutron:ovs:agent
    # anchor.
    pf = packetfilter.PacketFilter('_auto/neutron:ovs:agent')
    pf.remove_anchor_recursively()
    return smf_include.SMF_EXIT_OK


if __name__ == "__main__":
    os.putenv("LC_ALL", "C")
    smf_include.smf_main()