#!/usr/bin/env python3

# SPDX-License-Identifier: LGPL-2.1+

# ~~~

#   runtest.sh of /CoreOS/iproute/Sanity/ip-tuntap-sanity-test

#   Description: Test basic ip tuntap funcionality

#

#   Author: Susant Sahani <susant@redhat.com>

#   Copyright (c) 2018 Red Hat, Inc.

# ~~~

import errno

import os

import sys

import time

import unittest

import subprocess

import signal

import shutil

def setUpModule():

    if shutil.which('ip') is None:

        raise OSError(errno.ENOENT, 'ip not found')

class IPLinkUtilities():

    def link_exists(self, link):

        self.assertTrue(os.path.exists(os.path.join('/sys/class/net', link)))

class IPTuntapTests(unittest.TestCase, IPLinkUtilities):

    def test_add_tap(self):

        subprocess.check_output(['ip', 'tuntap', 'add', 'name', 'tap-test', 'mode', 'tap'])

        self.link_exists('tap-test')

        output=subprocess.check_output(['ip', 'tuntap', 'show', 'dev', 'tap-test']).rstrip().decode('utf-8')

        self.assertRegex(output, "tap-test: tap")

        subprocess.check_output(['ip', 'link', 'del', 'tap-test'])

    def test_add_tun(self):

        subprocess.check_output(['ip', 'tuntap', 'add', 'name', 'tun-test', 'mode', 'tun'])

        self.link_exists('tun-test')

        output=subprocess.check_output(['ip', 'tuntap', 'show', 'dev', 'tun-test']).rstrip().decode('utf-8')

        self.assertRegex(output, "tun-test: tun")

        subprocess.check_output(['ip', 'link', 'del', 'tun-test'])

    def test_add_tun_user_group(self):

        subprocess.check_output(['ip', 'tuntap', 'add', 'name', 'tun-test', 'mode', 'tun', 'user', 'root', 'group', 'root'])

        self.link_exists('tun-test')

        output=subprocess.check_output(['ip', 'tuntap', 'show', 'dev', 'tun-test']).rstrip().decode('utf-8')

        self.assertRegex(output, "tun-test: tun")

        self.assertRegex(output, "user 0 group 0")

        subprocess.check_output(['ip', 'link', 'del', 'tun-test'])

if __name__ == '__main__':

    unittest.main(testRunner=unittest.TextTestRunner(stream=sys.stdout,

                                                     verbosity=2))