summaryrefslogtreecommitdiff
path: root/common/tests/unit/src/com/android/net/module/util/IpUtilsTest.java
diff options
context:
space:
mode:
Diffstat (limited to 'common/tests/unit/src/com/android/net/module/util/IpUtilsTest.java')
-rw-r--r--common/tests/unit/src/com/android/net/module/util/IpUtilsTest.java225
1 files changed, 0 insertions, 225 deletions
diff --git a/common/tests/unit/src/com/android/net/module/util/IpUtilsTest.java b/common/tests/unit/src/com/android/net/module/util/IpUtilsTest.java
deleted file mode 100644
index d57023ca..00000000
--- a/common/tests/unit/src/com/android/net/module/util/IpUtilsTest.java
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * 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.
- */
-
-package com.android.net.module.util;
-
-import static com.android.net.module.util.NetworkStackConstants.ICMP_CHECKSUM_OFFSET;
-import static com.android.net.module.util.NetworkStackConstants.IPV4_CHECKSUM_OFFSET;
-
-import static org.junit.Assert.assertEquals;
-
-import androidx.test.filters.SmallTest;
-import androidx.test.runner.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import java.nio.ByteBuffer;
-
-@RunWith(AndroidJUnit4.class)
-@SmallTest
-public class IpUtilsTest {
-
- private static final int IPV4_HEADER_LENGTH = 20;
- private static final int IPV6_HEADER_LENGTH = 40;
- private static final int TCP_HEADER_LENGTH = 20;
- private static final int UDP_HEADER_LENGTH = 8;
- private static final int TCP_CHECKSUM_OFFSET = 16;
- private static final int UDP_CHECKSUM_OFFSET = 6;
-
- private int getUnsignedByte(ByteBuffer buf, int offset) {
- return buf.get(offset) & 0xff;
- }
-
- private int getChecksum(ByteBuffer buf, int offset) {
- return getUnsignedByte(buf, offset) * 256 + getUnsignedByte(buf, offset + 1);
- }
-
- private void assertChecksumEquals(int expected, short actual) {
- assertEquals(Integer.toHexString(expected), Integer.toHexString(actual & 0xffff));
- }
-
- // Generate test packets using Python code like this::
- //
- // from scapy import all as scapy
- //
- // def JavaPacketDefinition(bytes):
- // out = " ByteBuffer packet = ByteBuffer.wrap(new byte[] {\n "
- // for i in xrange(len(bytes)):
- // out += "(byte) 0x%02x" % ord(bytes[i])
- // if i < len(bytes) - 1:
- // if i % 4 == 3:
- // out += ",\n "
- // else:
- // out += ", "
- // out += "\n });"
- // return out
- //
- // packet = (scapy.IPv6(src="2001:db8::1", dst="2001:db8::2") /
- // scapy.UDP(sport=12345, dport=7) /
- // "hello")
- // print JavaPacketDefinition(str(packet))
-
- @Test
- public void testEmptyAndZeroBufferChecksum() throws Exception {
- ByteBuffer packet = ByteBuffer.wrap(new byte[] { (byte) 0x00, (byte) 0x00, });
- // the following should *not* return 0xFFFF
- assertEquals(0, IpUtils.checksum(packet, 0, 0, 0));
- assertEquals(0, IpUtils.checksum(packet, 0, 0, 1));
- assertEquals(0, IpUtils.checksum(packet, 0, 0, 2));
- assertEquals(0, IpUtils.checksum(packet, 0, 1, 2));
- assertEquals(0, IpUtils.checksum(packet, 0xFFFF, 0, 0));
- assertEquals(0, IpUtils.checksum(packet, 0xFFFF, 0, 1));
- assertEquals(0, IpUtils.checksum(packet, 0xFFFF, 0, 2));
- assertEquals(0, IpUtils.checksum(packet, 0xFFFF, 1, 2));
- }
-
- @Test
- public void testIpv6TcpChecksum() throws Exception {
- // packet = (scapy.IPv6(src="2001:db8::1", dst="2001:db8::2", tc=0x80) /
- // scapy.TCP(sport=12345, dport=7,
- // seq=1692871236, ack=128376451, flags=16,
- // window=32768) /
- // "hello, world")
- ByteBuffer packet = ByteBuffer.wrap(new byte[] {
- (byte) 0x68, (byte) 0x00, (byte) 0x00, (byte) 0x00,
- (byte) 0x00, (byte) 0x20, (byte) 0x06, (byte) 0x40,
- (byte) 0x20, (byte) 0x01, (byte) 0x0d, (byte) 0xb8,
- (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
- (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
- (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x01,
- (byte) 0x20, (byte) 0x01, (byte) 0x0d, (byte) 0xb8,
- (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
- (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
- (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x02,
- (byte) 0x30, (byte) 0x39, (byte) 0x00, (byte) 0x07,
- (byte) 0x64, (byte) 0xe7, (byte) 0x2a, (byte) 0x44,
- (byte) 0x07, (byte) 0xa6, (byte) 0xde, (byte) 0x83,
- (byte) 0x50, (byte) 0x10, (byte) 0x80, (byte) 0x00,
- (byte) 0xee, (byte) 0x71, (byte) 0x00, (byte) 0x00,
- (byte) 0x68, (byte) 0x65, (byte) 0x6c, (byte) 0x6c,
- (byte) 0x6f, (byte) 0x2c, (byte) 0x20, (byte) 0x77,
- (byte) 0x6f, (byte) 0x72, (byte) 0x6c, (byte) 0x64
- });
-
- // Check that a valid packet has checksum 0.
- int transportLen = packet.limit() - IPV6_HEADER_LENGTH;
- assertEquals(0, IpUtils.tcpChecksum(packet, 0, IPV6_HEADER_LENGTH, transportLen));
-
- // Check that we can calculate the checksum from scratch.
- int sumOffset = IPV6_HEADER_LENGTH + TCP_CHECKSUM_OFFSET;
- int sum = getUnsignedByte(packet, sumOffset) * 256 + getUnsignedByte(packet, sumOffset + 1);
- assertEquals(0xee71, sum);
-
- packet.put(sumOffset, (byte) 0);
- packet.put(sumOffset + 1, (byte) 0);
- assertChecksumEquals(sum, IpUtils.tcpChecksum(packet, 0, IPV6_HEADER_LENGTH, transportLen));
-
- // Check that writing the checksum back into the packet results in a valid packet.
- packet.putShort(
- sumOffset,
- IpUtils.tcpChecksum(packet, 0, IPV6_HEADER_LENGTH, transportLen));
- assertEquals(0, IpUtils.tcpChecksum(packet, 0, IPV6_HEADER_LENGTH, transportLen));
- }
-
- @Test
- public void testIpv4UdpChecksum() {
- // packet = (scapy.IP(src="192.0.2.1", dst="192.0.2.2", tos=0x40) /
- // scapy.UDP(sport=32012, dport=4500) /
- // "\xff")
- ByteBuffer packet = ByteBuffer.wrap(new byte[] {
- (byte) 0x45, (byte) 0x40, (byte) 0x00, (byte) 0x1d,
- (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x00,
- (byte) 0x40, (byte) 0x11, (byte) 0xf6, (byte) 0x8b,
- (byte) 0xc0, (byte) 0x00, (byte) 0x02, (byte) 0x01,
- (byte) 0xc0, (byte) 0x00, (byte) 0x02, (byte) 0x02,
- (byte) 0x7d, (byte) 0x0c, (byte) 0x11, (byte) 0x94,
- (byte) 0x00, (byte) 0x09, (byte) 0xee, (byte) 0x36,
- (byte) 0xff
- });
-
- // Check that a valid packet has IP checksum 0 and UDP checksum 0xffff (0 is not a valid
- // UDP checksum, so the udpChecksum rewrites 0 to 0xffff).
- assertEquals(0, IpUtils.ipChecksum(packet, 0));
- assertEquals((short) 0xffff, IpUtils.udpChecksum(packet, 0, IPV4_HEADER_LENGTH));
-
- // Check that we can calculate the checksums from scratch.
- final int ipSumOffset = IPV4_CHECKSUM_OFFSET;
- final int ipSum = getChecksum(packet, ipSumOffset);
- assertEquals(0xf68b, ipSum);
-
- packet.put(ipSumOffset, (byte) 0);
- packet.put(ipSumOffset + 1, (byte) 0);
- assertChecksumEquals(ipSum, IpUtils.ipChecksum(packet, 0));
-
- final int udpSumOffset = IPV4_HEADER_LENGTH + UDP_CHECKSUM_OFFSET;
- final int udpSum = getChecksum(packet, udpSumOffset);
- assertEquals(0xee36, udpSum);
-
- packet.put(udpSumOffset, (byte) 0);
- packet.put(udpSumOffset + 1, (byte) 0);
- assertChecksumEquals(udpSum, IpUtils.udpChecksum(packet, 0, IPV4_HEADER_LENGTH));
-
- // Check that writing the checksums back into the packet results in a valid packet.
- packet.putShort(ipSumOffset, IpUtils.ipChecksum(packet, 0));
- packet.putShort(udpSumOffset, IpUtils.udpChecksum(packet, 0, IPV4_HEADER_LENGTH));
- assertEquals(0, IpUtils.ipChecksum(packet, 0));
- assertEquals((short) 0xffff, IpUtils.udpChecksum(packet, 0, IPV4_HEADER_LENGTH));
- }
-
- @Test
- public void testIpv4IcmpChecksum() throws Exception {
- // packet = (scapy.IP(src="192.0.2.1", dst="192.0.2.2", tos=0x40) /
- // scapy.ICMP(type=0x8, id=0x1234, seq=0x5678) /
- // "hello, world")
- ByteBuffer packet = ByteBuffer.wrap(new byte[] {
- /* IPv4 */
- (byte) 0x45, (byte) 0x40, (byte) 0x00, (byte) 0x28,
- (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x00,
- (byte) 0x40, (byte) 0x01, (byte) 0xf6, (byte) 0x90,
- (byte) 0xc0, (byte) 0x00, (byte) 0x02, (byte) 0x01,
- (byte) 0xc0, (byte) 0x00, (byte) 0x02, (byte) 0x02,
- /* ICMP */
- (byte) 0x08, /* type: echo-request */
- (byte) 0x00, /* code: 0 */
- (byte) 0x4f, (byte) 0x07, /* chksum: 0x4f07 */
- (byte) 0x12, (byte) 0x34, /* id: 0x1234 */
- (byte) 0x56, (byte) 0x78, /* seq: 0x5678 */
- (byte) 0x68, (byte) 0x65, (byte) 0x6c, (byte) 0x6c, /* data: hello, world */
- (byte) 0x6f, (byte) 0x2c, (byte) 0x20, (byte) 0x77,
- (byte) 0x6f, (byte) 0x72, (byte) 0x6c, (byte) 0x64
- });
-
- // Check that a valid packet has checksum 0.
- int transportLen = packet.limit() - IPV4_HEADER_LENGTH;
- assertEquals(0, IpUtils.icmpChecksum(packet, IPV4_HEADER_LENGTH, transportLen));
-
- // Check that we can calculate the checksum from scratch.
- int sumOffset = IPV4_HEADER_LENGTH + ICMP_CHECKSUM_OFFSET;
- int sum = getUnsignedByte(packet, sumOffset) * 256 + getUnsignedByte(packet, sumOffset + 1);
- assertEquals(0x4f07, sum);
-
- packet.put(sumOffset, (byte) 0);
- packet.put(sumOffset + 1, (byte) 0);
- assertChecksumEquals(sum, IpUtils.icmpChecksum(packet, IPV4_HEADER_LENGTH, transportLen));
-
- // Check that writing the checksum back into the packet results in a valid packet.
- packet.putShort(
- sumOffset,
- IpUtils.icmpChecksum(packet, IPV4_HEADER_LENGTH, transportLen));
- assertEquals(0, IpUtils.icmpChecksum(packet, IPV4_HEADER_LENGTH, transportLen));
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-25 01:12:07 +0000