Move module sources to packages/Connectivity
Files that are planned to be part of the connectivity module are grouped
in packages/Connectivity, so they can be built separately and moved in
one operation with their history into packages/modules/Connectivity.
This places the files in the existing framework-connectivity-sources
filegroup instead of the current framework-core-sources filegroup. Both
are used the same way in framework-non-updatable-sources.
Bug: 171540887
Test: m
Change-Id: I62d9d91574ace6f5c4624035d190260c3126b91e
diff --git a/framework/src/android/net/NattKeepalivePacketData.java b/framework/src/android/net/NattKeepalivePacketData.java
new file mode 100644
index 0000000..c4f8fc2
--- /dev/null
+++ b/framework/src/android/net/NattKeepalivePacketData.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2019 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;
+
+import static android.net.InvalidPacketException.ERROR_INVALID_IP_ADDRESS;
+import static android.net.InvalidPacketException.ERROR_INVALID_PORT;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+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;
+import java.nio.ByteOrder;
+import java.util.Objects;
+
+/** @hide */
+@SystemApi
+public final class NattKeepalivePacketData extends KeepalivePacketData implements Parcelable {
+ private static final int IPV4_HEADER_LENGTH = 20;
+ private static final int UDP_HEADER_LENGTH = 8;
+
+ // This should only be constructed via static factory methods, such as
+ // nattKeepalivePacket
+ public NattKeepalivePacketData(@NonNull InetAddress srcAddress, int srcPort,
+ @NonNull InetAddress dstAddress, int dstPort, @NonNull byte[] data) throws
+ InvalidPacketException {
+ super(srcAddress, srcPort, dstAddress, dstPort, data);
+ }
+
+ /**
+ * Factory method to create Nat-T keepalive packet structure.
+ * @hide
+ */
+ public static NattKeepalivePacketData nattKeepalivePacket(
+ InetAddress srcAddress, int srcPort, InetAddress dstAddress, int dstPort)
+ throws InvalidPacketException {
+
+ if (!(srcAddress instanceof Inet4Address) || !(dstAddress instanceof Inet4Address)) {
+ throw new InvalidPacketException(ERROR_INVALID_IP_ADDRESS);
+ }
+
+ if (dstPort != NattSocketKeepalive.NATT_PORT) {
+ throw new InvalidPacketException(ERROR_INVALID_PORT);
+ }
+
+ int length = IPV4_HEADER_LENGTH + UDP_HEADER_LENGTH + 1;
+ ByteBuffer buf = ByteBuffer.allocate(length);
+ buf.order(ByteOrder.BIG_ENDIAN);
+ buf.putShort((short) 0x4500); // IP version and TOS
+ buf.putShort((short) length);
+ buf.putInt(0); // ID, flags, offset
+ buf.put((byte) 64); // TTL
+ buf.put((byte) OsConstants.IPPROTO_UDP);
+ int ipChecksumOffset = buf.position();
+ buf.putShort((short) 0); // IP checksum
+ buf.put(srcAddress.getAddress());
+ buf.put(dstAddress.getAddress());
+ buf.putShort((short) srcPort);
+ buf.putShort((short) dstPort);
+ buf.putShort((short) (length - 20)); // UDP length
+ int udpChecksumOffset = buf.position();
+ buf.putShort((short) 0); // UDP checksum
+ buf.put((byte) 0xff); // NAT-T keepalive
+ buf.putShort(ipChecksumOffset, IpUtils.ipChecksum(buf, 0));
+ buf.putShort(udpChecksumOffset, IpUtils.udpChecksum(buf, 0, IPV4_HEADER_LENGTH));
+
+ return new NattKeepalivePacketData(srcAddress, srcPort, dstAddress, dstPort, buf.array());
+ }
+
+ /** Parcelable Implementation */
+ public int describeContents() {
+ return 0;
+ }
+
+ /** Write to parcel */
+ public void writeToParcel(@NonNull Parcel out, int flags) {
+ out.writeString(getSrcAddress().getHostAddress());
+ out.writeString(getDstAddress().getHostAddress());
+ out.writeInt(getSrcPort());
+ out.writeInt(getDstPort());
+ }
+
+ /** Parcelable Creator */
+ public static final @NonNull Parcelable.Creator<NattKeepalivePacketData> CREATOR =
+ new Parcelable.Creator<NattKeepalivePacketData>() {
+ public NattKeepalivePacketData createFromParcel(Parcel in) {
+ final InetAddress srcAddress =
+ InetAddresses.parseNumericAddress(in.readString());
+ final InetAddress dstAddress =
+ InetAddresses.parseNumericAddress(in.readString());
+ final int srcPort = in.readInt();
+ final int dstPort = in.readInt();
+ try {
+ return NattKeepalivePacketData.nattKeepalivePacket(srcAddress, srcPort,
+ dstAddress, dstPort);
+ } catch (InvalidPacketException e) {
+ throw new IllegalArgumentException(
+ "Invalid NAT-T keepalive data: " + e.getError());
+ }
+ }
+
+ public NattKeepalivePacketData[] newArray(int size) {
+ return new NattKeepalivePacketData[size];
+ }
+ };
+
+ @Override
+ public boolean equals(@Nullable final Object o) {
+ if (!(o instanceof NattKeepalivePacketData)) return false;
+ final NattKeepalivePacketData other = (NattKeepalivePacketData) o;
+ final InetAddress srcAddress = getSrcAddress();
+ final InetAddress dstAddress = getDstAddress();
+ return srcAddress.equals(other.getSrcAddress())
+ && dstAddress.equals(other.getDstAddress())
+ && getSrcPort() == other.getSrcPort()
+ && getDstPort() == other.getDstPort();
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(getSrcAddress(), getDstAddress(), getSrcPort(), getDstPort());
+ }
+}