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Merge "Move IpUtils to frameworks/libs/net" am: e842db3548

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Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1440234

Change-Id: Ibd41a02a9a185667a7fe332213ef692c4d8bf515
This commit is contained in:
Remi NGUYEN VAN
2020-10-09 00:30:36 +00:00
committed by Automerger Merge Worker
parent 98e157c405 e842db3548
commit 62e99304d6
9 changed files with 8 additions and 324 deletions
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1
Android.bp
View File

@@ -769,7 +769,6 @@ filegroup {
name: "framework-services-net-module-wifi-shared-srcs",
srcs: [
"core/java/android/net/DhcpResults.java",
"core/java/android/net/util/IpUtils.java",
"core/java/android/util/LocalLog.java",
],
}

3
core/java/android/net/KeepalivePacketData.java
View File

@@ -22,9 +22,10 @@ import static android.net.InvalidPacketException.ERROR_INVALID_PORT;
import android.annotation.IntRange;
import android.annotation.NonNull;
import android.annotation.SystemApi;
import android.net.util.IpUtils;
import android.util.Log;
import com.android.net.module.util.IpUtils;
import java.net.InetAddress;
/**

3
core/java/android/net/NattKeepalivePacketData.java
View File

@@ -22,11 +22,12 @@ import static android.net.InvalidPacketException.ERROR_INVALID_PORT;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.SystemApi;
import android.net.util.IpUtils;
import android.os.Parcel;
import android.os.Parcelable;
import android.system.OsConstants;
import com.android.net.module.util.IpUtils;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.nio.ByteBuffer;

151
core/java/android/net/util/IpUtils.java
View File

@@ -1,151 +0,0 @@
/*
* Copyright (C) 2015 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 android.net.util;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.nio.BufferOverflowException;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.nio.ShortBuffer;
import static android.system.OsConstants.IPPROTO_TCP;
import static android.system.OsConstants.IPPROTO_UDP;
/**
* @hide
*/
public class IpUtils {
/**
* Converts a signed short value to an unsigned int value. Needed
* because Java does not have unsigned types.
*/
private static int intAbs(short v) {
return v & 0xFFFF;
}
/**
* Performs an IP checksum (used in IP header and across UDP
* payload) on the specified portion of a ByteBuffer. The seed
* allows the checksum to commence with a specified value.
*/
private static int checksum(ByteBuffer buf, int seed, int start, int end) {
int sum = seed;
final int bufPosition = buf.position();
// set position of original ByteBuffer, so that the ShortBuffer
// will be correctly initialized
buf.position(start);
ShortBuffer shortBuf = buf.asShortBuffer();
// re-set ByteBuffer position
buf.position(bufPosition);
final int numShorts = (end - start) / 2;
for (int i = 0; i < numShorts; i++) {
sum += intAbs(shortBuf.get(i));
}
start += numShorts * 2;
// see if a singleton byte remains
if (end != start) {
short b = buf.get(start);
// make it unsigned
if (b < 0) {
b += 256;
}
sum += b * 256;
}
sum = ((sum >> 16) & 0xFFFF) + (sum & 0xFFFF);
sum = ((sum + ((sum >> 16) & 0xFFFF)) & 0xFFFF);
int negated = ~sum;
return intAbs((short) negated);
}
private static int pseudoChecksumIPv4(
ByteBuffer buf, int headerOffset, int protocol, int transportLen) {
int partial = protocol + transportLen;
partial += intAbs(buf.getShort(headerOffset + 12));
partial += intAbs(buf.getShort(headerOffset + 14));
partial += intAbs(buf.getShort(headerOffset + 16));
partial += intAbs(buf.getShort(headerOffset + 18));
return partial;
}
private static int pseudoChecksumIPv6(
ByteBuffer buf, int headerOffset, int protocol, int transportLen) {
int partial = protocol + transportLen;
for (int offset = 8; offset < 40; offset += 2) {
partial += intAbs(buf.getShort(headerOffset + offset));
}
return partial;
}
private static byte ipversion(ByteBuffer buf, int headerOffset) {
return (byte) ((buf.get(headerOffset) & (byte) 0xf0) >> 4);
}
public static short ipChecksum(ByteBuffer buf, int headerOffset) {
byte ihl = (byte) (buf.get(headerOffset) & 0x0f);
return (short) checksum(buf, 0, headerOffset, headerOffset + ihl * 4);
}
private static short transportChecksum(ByteBuffer buf, int protocol,
int ipOffset, int transportOffset, int transportLen) {
if (transportLen < 0) {
throw new IllegalArgumentException("Transport length < 0: " + transportLen);
}
int sum;
byte ver = ipversion(buf, ipOffset);
if (ver == 4) {
sum = pseudoChecksumIPv4(buf, ipOffset, protocol, transportLen);
} else if (ver == 6) {
sum = pseudoChecksumIPv6(buf, ipOffset, protocol, transportLen);
} else {
throw new UnsupportedOperationException("Checksum must be IPv4 or IPv6");
}
sum = checksum(buf, sum, transportOffset, transportOffset + transportLen);
if (protocol == IPPROTO_UDP && sum == 0) {
sum = (short) 0xffff;
}
return (short) sum;
}
public static short udpChecksum(ByteBuffer buf, int ipOffset, int transportOffset) {
int transportLen = intAbs(buf.getShort(transportOffset + 4));
return transportChecksum(buf, IPPROTO_UDP, ipOffset, transportOffset, transportLen);
}
public static short tcpChecksum(ByteBuffer buf, int ipOffset, int transportOffset,
int transportLen) {
return transportChecksum(buf, IPPROTO_TCP, ipOffset, transportOffset, transportLen);
}
public static String addressAndPortToString(InetAddress address, int port) {
return String.format(
(address instanceof Inet6Address) ? "[%s]:%d" : "%s:%d",
address.getHostAddress(), port);
}
public static boolean isValidUdpOrTcpPort(int port) {
return port > 0 && port < 65536;
}
}

2
packages/Tethering/tests/privileged/src/android/net/ip/DadProxyTest.java
View File

@@ -33,7 +33,6 @@ import android.net.MacAddress;
import android.net.TestNetworkInterface;
import android.net.TestNetworkManager;
import android.net.util.InterfaceParams;
import android.net.util.IpUtils;
import android.net.util.TetheringUtils;
import android.os.Handler;
import android.os.HandlerThread;
@@ -46,6 +45,7 @@ import androidx.test.InstrumentationRegistry;
import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;
import com.android.net.module.util.IpUtils;
import com.android.testutils.TapPacketReader;
import org.junit.After;

2
services/core/java/com/android/server/connectivity/KeepaliveTracker.java
View File

@@ -47,7 +47,6 @@ import android.net.NetworkAgent;
import android.net.NetworkUtils;
import android.net.SocketKeepalive.InvalidSocketException;
import android.net.TcpKeepalivePacketData;
import android.net.util.IpUtils;
import android.net.util.KeepaliveUtils;
import android.os.Binder;
import android.os.Handler;
@@ -63,6 +62,7 @@ import android.util.Pair;
import com.android.internal.R;
import com.android.internal.util.HexDump;
import com.android.internal.util.IndentingPrintWriter;
import com.android.net.module.util.IpUtils;
import java.io.FileDescriptor;
import java.net.InetAddress;

3
services/net/java/android/net/TcpKeepalivePacketData.java
View File

@@ -19,11 +19,12 @@ import static android.net.SocketKeepalive.ERROR_INVALID_IP_ADDRESS;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.net.util.IpUtils;
import android.os.Parcel;
import android.os.Parcelable;
import android.system.OsConstants;
import com.android.net.module.util.IpUtils;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;

166
tests/net/java/android/net/util/IpUtilsTest.java
View File

@@ -1,166 +0,0 @@
/*
* Copyright (C) 2015 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 android.net.util;
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 IP_CHECKSUM_OFFSET = 10;
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 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 = IP_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));
}
}

1
wifi/jarjar-rules.txt
View File

@@ -70,7 +70,6 @@ rule android.net.util.NetworkConstants* com.android.wifi.x.@0
rule android.net.util.InterfaceParams* com.android.wifi.x.@0
rule android.net.util.SharedLog* com.android.wifi.x.@0
rule android.net.util.NetUtils* com.android.wifi.x.@0
rule android.net.util.IpUtils* com.android.wifi.x.@0
rule androidx.annotation.** com.android.wifi.x.@0