# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright (c) 2014, 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.

#

# @author: Girish Moodalbail, Oracle, Inc.

#

"""Implements ipfilter and ipnat rules using Solaris utilities."""

from quantum.agent.solaris import net_lib

class IpfiltersManager(object):

    """Wrapper for Solaris IPF commands -- ipf(1m), ipnat(1m),

    and ippool(1m)."""

    def __init__(self):

        self.ipv4 = {'filter': [], 'nat': []}

        self.ipv6 = {'filter': [], 'nat': []}

    def add_ippool(self, number, ip_cidrs):

        ippool = net_lib.IppoolCommand(number)

        if ip_cidrs:

            ippool.add_pool_nodes(ip_cidrs)

        else:

            ippool.add_pool()

    def remove_ippool(self, number, ip_cidrs):

        ippool = net_lib.IppoolCommand(number)

        if ip_cidrs:

            ippool.remove_pool_nodes(ip_cidrs)

        else:

            ippool.remove_pool()

    def add_nat_rules(self, rules, version='4'):

        # Solaris doesn't support IPv6 NAT rules

        assert version == '4'

        ipnat = net_lib.IpnatCommand()

        ipnat.add_rules(rules)

        # we successfully added the nat rules, update the local copy

        for rule in rules:

            self.ipv4['nat'].append(rule)

    def remove_nat_rules(self, rules, version='4'):

        # Solaris doesn't support IPv6 NAT rules

        assert version == '4'

        ipnat = net_lib.IpnatCommand()

        ipnat.remove_rules(rules)

        # we successfully removed the nat rules, update the local copy

        for rule in rules:

            self.ipv4['nat'].remove(rule)

    def add_ipf_rules(self, rules, version='4'):

        ipf = net_lib.IpfilterCommand()

        ipf.add_rules(rules, version)

        version_rules = (self.ipv4['filter'] if version == '4' else

                         self.ipv6['filter'])

        for rule in rules:

            version_rules.append(rule)

    def remove_ipf_rules(self, rules, version='4'):

        ipf = net_lib.IpfilterCommand()

        ipf.remove_rules(rules, version)

        version_rules = (self.ipv4['filter'] if version == '4' else

                         self.ipv6['filter'])

        for rule in rules:

            version_rules.remove(rule)