1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.net;
18
19import android.net.NetworkUtils;
20import android.test.suitebuilder.annotation.SmallTest;
21
22import java.net.Inet4Address;
23import java.net.InetAddress;
24
25import junit.framework.TestCase;
26
27public class NetworkUtilsTest extends TestCase {
28
29    private InetAddress Address(String addr) {
30        return InetAddress.parseNumericAddress(addr);
31    }
32
33    private Inet4Address IPv4Address(String addr) {
34        return (Inet4Address) Address(addr);
35    }
36
37    @SmallTest
38    public void testGetImplicitNetmask() {
39        assertEquals(8, NetworkUtils.getImplicitNetmask(IPv4Address("4.2.2.2")));
40        assertEquals(8, NetworkUtils.getImplicitNetmask(IPv4Address("10.5.6.7")));
41        assertEquals(16, NetworkUtils.getImplicitNetmask(IPv4Address("173.194.72.105")));
42        assertEquals(16, NetworkUtils.getImplicitNetmask(IPv4Address("172.23.68.145")));
43        assertEquals(24, NetworkUtils.getImplicitNetmask(IPv4Address("192.0.2.1")));
44        assertEquals(24, NetworkUtils.getImplicitNetmask(IPv4Address("192.168.5.1")));
45        assertEquals(32, NetworkUtils.getImplicitNetmask(IPv4Address("224.0.0.1")));
46        assertEquals(32, NetworkUtils.getImplicitNetmask(IPv4Address("255.6.7.8")));
47    }
48
49    private void assertInvalidNetworkMask(Inet4Address addr) {
50        try {
51            NetworkUtils.netmaskToPrefixLength(addr);
52            fail("Invalid netmask " + addr.getHostAddress() + " did not cause exception");
53        } catch (IllegalArgumentException expected) {
54        }
55    }
56
57    @SmallTest
58    public void testNetmaskToPrefixLength() {
59        assertEquals(0, NetworkUtils.netmaskToPrefixLength(IPv4Address("0.0.0.0")));
60        assertEquals(9, NetworkUtils.netmaskToPrefixLength(IPv4Address("255.128.0.0")));
61        assertEquals(17, NetworkUtils.netmaskToPrefixLength(IPv4Address("255.255.128.0")));
62        assertEquals(23, NetworkUtils.netmaskToPrefixLength(IPv4Address("255.255.254.0")));
63        assertEquals(31, NetworkUtils.netmaskToPrefixLength(IPv4Address("255.255.255.254")));
64        assertEquals(32, NetworkUtils.netmaskToPrefixLength(IPv4Address("255.255.255.255")));
65
66        assertInvalidNetworkMask(IPv4Address("0.0.0.1"));
67        assertInvalidNetworkMask(IPv4Address("255.255.255.253"));
68        assertInvalidNetworkMask(IPv4Address("255.255.0.255"));
69    }
70}
71