Merge changes I2cea553a,Id8d3dcf6,I19e68e88,I35598935,Idd7dc369, ... (e01b4ce6) · Commits · e / os / android_frameworks_base

core/java/android/net/NetworkUtils.java

+37 −3

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@ import android.util.Log;
		import android.util.Pair;

		import java.io.FileDescriptor;
		import java.io.IOException;
		import java.math.BigInteger;
		import java.net.Inet4Address;
		import java.net.Inet6Address;
		@@ -130,6 +131,17 @@ public class NetworkUtils {
		*/
		public native static boolean queryUserAccess(int uid, int netId);

		/**
		* Add an entry into the ARP cache.
		*/
		public static void addArpEntry(Inet4Address ipv4Addr, MacAddress ethAddr, String ifname,
		FileDescriptor fd) throws IOException {
		addArpEntry(ethAddr.toByteArray(), ipv4Addr.getAddress(), ifname, fd);
		}

		private static native void addArpEntry(byte[] ethAddr, byte[] netAddr, String ifname,
		FileDescriptor fd) throws IOException;

		/**
		* @see #intToInet4AddressHTL(int)
		* @deprecated Use either {@link #intToInet4AddressHTH(int)}
		@@ -149,7 +161,7 @@ public class NetworkUtils {
		* @param hostAddress an int coding for an IPv4 address, where higher-order int byte is
		* lower-order IPv4 address byte
		*/
		public static InetAddress intToInet4AddressHTL(int hostAddress) {
		public static Inet4Address intToInet4AddressHTL(int hostAddress) {
		return intToInet4AddressHTH(Integer.reverseBytes(hostAddress));
		}

		@@ -157,14 +169,14 @@ public class NetworkUtils {
		* Convert a IPv4 address from an integer to an InetAddress (0x01020304 -> 1.2.3.4)
		* @param hostAddress an int coding for an IPv4 address
		*/
		public static InetAddress intToInet4AddressHTH(int hostAddress) {
		public static Inet4Address intToInet4AddressHTH(int hostAddress) {
		byte[] addressBytes = { (byte) (0xff & (hostAddress >> 24)),
		(byte) (0xff & (hostAddress >> 16)),
		(byte) (0xff & (hostAddress >> 8)),
		(byte) (0xff & hostAddress) };

		try {
		return InetAddress.getByAddress(addressBytes);
		return (Inet4Address) InetAddress.getByAddress(addressBytes);
		} catch (UnknownHostException e) {
		throw new AssertionError();
		}
		@@ -396,6 +408,28 @@ public class NetworkUtils {
		return new Pair<InetAddress, Integer>(address, prefixLength);
		}

		/**
		* Get a prefix mask as Inet4Address for a given prefix length.
		*
		* <p>For example 20 -> 255.255.240.0
		*/
		public static Inet4Address getPrefixMaskAsInet4Address(int prefixLength)
		throws IllegalArgumentException {
		return intToInet4AddressHTH(prefixLengthToV4NetmaskIntHTH(prefixLength));
		}

		/**
		* Get the broadcast address for a given prefix.
		*
		* <p>For example 192.168.0.1/24 -> 192.168.0.255
		*/
		public static Inet4Address getBroadcastAddress(Inet4Address addr, int prefixLength)
		throws IllegalArgumentException {
		final int intBroadcastAddr = inet4AddressToIntHTH(addr)
		\| ~prefixLengthToV4NetmaskIntHTH(prefixLength);
		return intToInet4AddressHTH(intBroadcastAddr);
		}

		/**
		* Check if IP address type is consistent between two InetAddress.
		* @return true if both are the same type. False otherwise.

core/jni/android_net_NetUtils.cpp

+50 −0

Original line number	Diff line number	Diff line
		@@ -323,6 +323,55 @@ static jboolean android_net_utils_queryUserAccess(JNIEnv *env, jobject thiz, jin
		return (jboolean) !queryUserAccess(uid, netId);
		}

		static bool checkLenAndCopy(JNIEnv* env, const jbyteArray& addr, int len, void* dst)
		{
		if (env->GetArrayLength(addr) != len) {
		return false;
		}
		env->GetByteArrayRegion(addr, 0, len, reinterpret_cast<jbyte*>(dst));
		return true;
		}

		static void android_net_utils_addArpEntry(JNIEnv *env, jobject thiz, jbyteArray ethAddr,
		jbyteArray ipv4Addr, jstring ifname, jobject javaFd)
		{
		struct arpreq req = {};
		struct sockaddr_in& netAddrStruct = reinterpret_cast<sockaddr_in>(&req.arp_pa);
		struct sockaddr& ethAddrStruct = req.arp_ha;

		ethAddrStruct.sa_family = ARPHRD_ETHER;
		if (!checkLenAndCopy(env, ethAddr, ETH_ALEN, ethAddrStruct.sa_data)) {
		jniThrowException(env, "java/io/IOException", "Invalid ethAddr length");
		return;
		}

		netAddrStruct.sin_family = AF_INET;
		if (!checkLenAndCopy(env, ipv4Addr, sizeof(in_addr), &netAddrStruct.sin_addr)) {
		jniThrowException(env, "java/io/IOException", "Invalid ipv4Addr length");
		return;
		}

		int ifLen = env->GetStringLength(ifname);
		// IFNAMSIZ includes the terminating NULL character
		if (ifLen >= IFNAMSIZ) {
		jniThrowException(env, "java/io/IOException", "ifname too long");
		return;
		}
		env->GetStringUTFRegion(ifname, 0, ifLen, req.arp_dev);

		req.arp_flags = ATF_COM; // Completed entry (ha valid)
		int fd = jniGetFDFromFileDescriptor(env, javaFd);
		if (fd < 0) {
		jniThrowExceptionFmt(env, "java/io/IOException", "Invalid file descriptor");
		return;
		}
		// See also: man 7 arp
		if (ioctl(fd, SIOCSARP, &req)) {
		jniThrowExceptionFmt(env, "java/io/IOException", "ioctl error: %s", strerror(errno));
		return;
		}
		}


		// ----------------------------------------------------------------------------

		@@ -337,6 +386,7 @@ static const JNINativeMethod gNetworkUtilMethods[] = {
		{ "bindSocketToNetwork", "(II)I", (void*) android_net_utils_bindSocketToNetwork },
		{ "protectFromVpn", "(I)Z", (void*)android_net_utils_protectFromVpn },
		{ "queryUserAccess", "(II)Z", (void*)android_net_utils_queryUserAccess },
		{ "addArpEntry", "([B[BLjava/lang/String;Ljava/io/FileDescriptor;)V", (void*) android_net_utils_addArpEntry },
		{ "attachDhcpFilter", "(Ljava/io/FileDescriptor;)V", (void*) android_net_utils_attachDhcpFilter },
		{ "attachRaFilter", "(Ljava/io/FileDescriptor;I)V", (void*) android_net_utils_attachRaFilter },
		{ "attachControlPacketFilter", "(Ljava/io/FileDescriptor;I)V", (void*) android_net_utils_attachControlPacketFilter },

services/net/java/android/net/dhcp/DhcpDiscoverPacket.java

+11 −4

Original line number	Diff line number	Diff line
		@@ -23,11 +23,18 @@ import java.nio.ByteBuffer;
		* This class implements the DHCP-DISCOVER packet.
		*/
		class DhcpDiscoverPacket extends DhcpPacket {
		/**
		* The IP address of the client which sent this packet.
		*/
		final Inet4Address mSrcIp;

		/**
		* Generates a DISCOVER packet with the specified parameters.
		*/
		DhcpDiscoverPacket(int transId, short secs, byte[] clientMac, boolean broadcast) {
		super(transId, secs, INADDR_ANY, INADDR_ANY, INADDR_ANY, INADDR_ANY, clientMac, broadcast);
		DhcpDiscoverPacket(int transId, short secs, Inet4Address relayIp, byte[] clientMac,
		boolean broadcast, Inet4Address srcIp) {
		super(transId, secs, INADDR_ANY, INADDR_ANY, INADDR_ANY, relayIp, clientMac, broadcast);
		mSrcIp = srcIp;
		}

		public String toString() {
		@@ -41,8 +48,8 @@ class DhcpDiscoverPacket extends DhcpPacket {
		*/
		public ByteBuffer buildPacket(int encap, short destUdp, short srcUdp) {
		ByteBuffer result = ByteBuffer.allocate(MAX_LENGTH);
		fillInPacket(encap, INADDR_BROADCAST, INADDR_ANY, destUdp,
		srcUdp, result, DHCP_BOOTREQUEST, mBroadcast);
		fillInPacket(encap, INADDR_BROADCAST, mSrcIp, destUdp, srcUdp, result, DHCP_BOOTREQUEST,
		mBroadcast);
		result.flip();
		return result;
		}

services/net/java/android/net/dhcp/DhcpLease.java

0 → 100644

+138 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2018 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.dhcp;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.net.MacAddress;
		import android.os.SystemClock;
		import android.text.TextUtils;

		import com.android.internal.util.HexDump;

		import java.net.Inet4Address;
		import java.util.Arrays;
		import java.util.Objects;

		/**
		* An IPv4 address assignment done through DHCPv4.
		* @hide
		*/
		public class DhcpLease {
		public static final long EXPIRATION_NEVER = Long.MAX_VALUE;
		public static final String HOSTNAME_NONE = null;

		@Nullable
		private final byte[] mClientId;
		@NonNull
		private final MacAddress mHwAddr;
		@NonNull
		private final Inet4Address mNetAddr;
		/**
		* Expiration time for the lease, to compare with {@link SystemClock#elapsedRealtime()}.
		*/
		private final long mExpTime;
		@Nullable
		private final String mHostname;

		public DhcpLease(@Nullable byte[] clientId, @NonNull MacAddress hwAddr,
		@NonNull Inet4Address netAddr, long expTime, @Nullable String hostname) {
		mClientId = (clientId == null ? null : Arrays.copyOf(clientId, clientId.length));
		mHwAddr = hwAddr;
		mNetAddr = netAddr;
		mExpTime = expTime;
		mHostname = hostname;
		}

		@Nullable
		public byte[] getClientId() {
		if (mClientId == null) {
		return null;
		}
		return Arrays.copyOf(mClientId, mClientId.length);
		}

		@NonNull
		public MacAddress getHwAddr() {
		return mHwAddr;
		}

		@Nullable
		public String getHostname() {
		return mHostname;
		}

		@NonNull
		public Inet4Address getNetAddr() {
		return mNetAddr;
		}

		public long getExpTime() {
		return mExpTime;
		}

		/**
		* Push back the expiration time of this lease. If the provided time is sooner than the original
		* expiration time, the lease time will not be updated.
		*
		* <p>The lease hostname is updated with the provided one if set.
		* @return A {@link DhcpLease} with expiration time set to max(expTime, currentExpTime)
		*/
		public DhcpLease renewedLease(long expTime, @Nullable String hostname) {
		return new DhcpLease(mClientId, mHwAddr, mNetAddr, Math.max(expTime, mExpTime),
		(hostname == null ? mHostname : hostname));
		}

		public boolean matchesClient(@Nullable byte[] clientId, @NonNull MacAddress hwAddr) {
		if (mClientId != null) {
		return Arrays.equals(mClientId, clientId);
		} else {
		return clientId == null && mHwAddr.equals(hwAddr);
		}
		}

		@Override
		public boolean equals(Object obj) {
		if (!(obj instanceof DhcpLease)) {
		return false;
		}
		final DhcpLease other = (DhcpLease)obj;
		return Arrays.equals(mClientId, other.mClientId)
		&& mHwAddr.equals(other.mHwAddr)
		&& mNetAddr.equals(other.mNetAddr)
		&& mExpTime == other.mExpTime
		&& TextUtils.equals(mHostname, other.mHostname);
		}

		@Override
		public int hashCode() {
		return Objects.hash(mClientId, mHwAddr, mNetAddr, mHostname, mExpTime);
		}

		static String clientIdToString(byte[] bytes) {
		if (bytes == null) {
		return "null";
		}
		return HexDump.toHexString(bytes);
		}

		@Override
		public String toString() {
		return String.format("clientId: %s, hwAddr: %s, netAddr: %s, expTime: %d, hostname: %s",
		clientIdToString(mClientId), mHwAddr.toString(), mNetAddr, mExpTime, mHostname);
		}
		}

services/net/java/android/net/dhcp/DhcpLeaseRepository.java

0 → 100644

+538 −0

File added.

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