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#!/usr/bin/env python3
#
# Copyright (C) 2019-2020 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

import os
import unittest
import vyos.config
import vyos.configsession

from netifaces import ifaddresses, AF_INET, AF_INET6
from vyos.validate import is_intf_addr_assigned, is_ipv6_link_local
from vyos.interfaces import list_interfaces_of_type

class BasicInterfaceTest:
    class BaseTest(unittest.TestCase):
        def setUp(self):
            self.session = vyos.configsession.ConfigSession(os.getpid())
            env = self.session.get_session_env()
            self.config = vyos.config.Config(session_env=env)
            self._test_addr = ['192.0.2.1/25', '2001:db8:1::ffff/64']

        def tearDown(self):
            self.session.delete(self._base_path)
            self.session.commit()

        def test_add_address(self):
            """ Check if address can be added to interface """

            # Add address
            for intf in self._interfaces:
                for addr in self._test_addr:
                    self.session.set(self._base_path + [intf, 'address', addr])
                self.session.commit()

            # Validate address
            for intf in self._interfaces:
                for af in AF_INET, AF_INET6:
                    for addr in ifaddresses(intf)[af]:
                        # checking link local addresses makes no sense
                        if is_ipv6_link_local(addr['addr']):
                            continue

                        self.assertTrue(is_intf_addr_assigned(intf, addr['addr']))


class BondInterfaceTest(BasicInterfaceTest.BaseTest):
    def setUp(self):
         super().setUp()
         self._base_path = ['interfaces', 'bonding']
         self._interfaces = ['bond0']

    def test_add_remove_member(self):
        members = []
        # we need to filter out VLAN interfaces identified by a dot (.)
        # in their name - just in case!
        for tmp in list_interfaces_of_type("ethernet"):
            if not '.' in tmp:
                members.append(tmp)

        for intf in self._interfaces:
            for member in members:
                # We can not enslave an interface when there is an address
                # assigned - take care here - or find them dynamically if a user
                # runs vyos-smoketest on his production device?
                self.session.set(self._base_path + [intf, 'member', 'interface', member])

        self.session.commit()

        for intf in self._interfaces:
            self.session.delete(self._base_path + [intf, 'member'])

        self.session.commit()


class BridgeInterfaceTest(BasicInterfaceTest.BaseTest):
    def setUp(self):
        super().setUp()
        self._base_path = ['interfaces', 'bridge']
        self._interfaces = ['br0']

    def test_add_remove_member(self):
        members = list_interfaces_of_type("ethernet")

        for intf in self._interfaces:
            cost = 1000
            priority = 10

            self.session.set(self._base_path + [intf, 'stp'])
            for member in members:
                self.session.set(self._base_path + [intf, 'member', 'interface', member])
                self.session.set(self._base_path + [intf, 'member', 'interface', member, 'cost', str(cost)])
                self.session.set(self._base_path + [intf, 'member', 'interface', member, 'priority', str(priority)])
                cost += 1
                priority += 1
        self.session.commit()

        for intf in self._interfaces:
            self.session.delete(self._base_path + [intf, 'member'])
        self.session.commit()


if __name__ == '__main__':
    unittest.main()