| /* |
| * 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; |
| |
| import static android.net.InvalidPacketException.ERROR_INVALID_IP_ADDRESS; |
| import static android.net.InvalidPacketException.ERROR_INVALID_PORT; |
| |
| import android.annotation.NonNull; |
| import android.annotation.SystemApi; |
| import android.net.util.IpUtils; |
| import android.util.Log; |
| |
| import java.net.InetAddress; |
| |
| /** |
| * Represents the actual packets that are sent by the |
| * {@link android.net.SocketKeepalive} API. |
| * @hide |
| */ |
| @SystemApi |
| public class KeepalivePacketData { |
| private static final String TAG = "KeepalivePacketData"; |
| |
| /** Source IP address */ |
| @NonNull |
| public final InetAddress srcAddress; |
| |
| /** Destination IP address */ |
| @NonNull |
| public final InetAddress dstAddress; |
| |
| /** Source port */ |
| public final int srcPort; |
| |
| /** Destination port */ |
| public final int dstPort; |
| |
| /** Packet data. A raw byte string of packet data, not including the link-layer header. */ |
| private final byte[] mPacket; |
| |
| // Note: If you add new fields, please modify the parcelling code in the child classes. |
| |
| |
| // This should only be constructed via static factory methods, such as |
| // nattKeepalivePacket. |
| /** |
| * A holding class for data necessary to build a keepalive packet. |
| */ |
| protected KeepalivePacketData(@NonNull InetAddress srcAddress, int srcPort, |
| @NonNull InetAddress dstAddress, int dstPort, |
| @NonNull byte[] data) throws InvalidPacketException { |
| this.srcAddress = srcAddress; |
| this.dstAddress = dstAddress; |
| this.srcPort = srcPort; |
| this.dstPort = dstPort; |
| this.mPacket = data; |
| |
| // Check we have two IP addresses of the same family. |
| if (srcAddress == null || dstAddress == null || !srcAddress.getClass().getName() |
| .equals(dstAddress.getClass().getName())) { |
| Log.e(TAG, "Invalid or mismatched InetAddresses in KeepalivePacketData"); |
| throw new InvalidPacketException(ERROR_INVALID_IP_ADDRESS); |
| } |
| |
| // Check the ports. |
| if (!IpUtils.isValidUdpOrTcpPort(srcPort) || !IpUtils.isValidUdpOrTcpPort(dstPort)) { |
| Log.e(TAG, "Invalid ports in KeepalivePacketData"); |
| throw new InvalidPacketException(ERROR_INVALID_PORT); |
| } |
| } |
| |
| @NonNull |
| public byte[] getPacket() { |
| return mPacket.clone(); |
| } |
| |
| } |