| /* |
| * Copyright (C) 2010 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 android.os.Parcel; |
| import android.os.Parcelable; |
| |
| import java.net.InetAddress; |
| import java.net.InterfaceAddress; |
| import java.net.UnknownHostException; |
| |
| /** |
| * Identifies an address of a network link |
| * @hide |
| */ |
| public class LinkAddress implements Parcelable { |
| /** |
| * IPv4 or IPv6 address. |
| */ |
| private final InetAddress address; |
| |
| /** |
| * Network prefix |
| */ |
| private final int prefix; |
| |
| public LinkAddress(InetAddress address, InetAddress mask) { |
| this.address = address; |
| this.prefix = computeprefix(mask); |
| } |
| |
| public LinkAddress(InetAddress address, int prefix) { |
| this.address = address; |
| this.prefix = prefix; |
| } |
| |
| public LinkAddress(InterfaceAddress interfaceAddress) { |
| this.address = interfaceAddress.getAddress(); |
| this.prefix = interfaceAddress.getNetworkPrefixLength(); |
| } |
| |
| private static int computeprefix(InetAddress mask) { |
| int count = 0; |
| for (byte b : mask.getAddress()) { |
| for (int i = 0; i < 8; ++i) { |
| if ((b & (1 << i)) != 0) { |
| ++count; |
| } |
| } |
| } |
| return count; |
| } |
| |
| @Override |
| public String toString() { |
| return (address == null ? "" : (address.getHostAddress() + "/" + prefix)); |
| } |
| |
| /** |
| * Compares this {@code LinkAddress} instance against the specified address |
| * in {@code obj}. Two addresses are equal if their InetAddress and prefix |
| * are equal |
| * |
| * @param obj the object to be tested for equality. |
| * @return {@code true} if both objects are equal, {@code false} otherwise. |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof LinkAddress)) { |
| return false; |
| } |
| LinkAddress linkAddress = (LinkAddress) obj; |
| return this.address.equals(linkAddress.address) && |
| this.prefix == linkAddress.prefix; |
| } |
| |
| /** |
| * Returns the InetAddress for this address. |
| */ |
| public InetAddress getAddress() { |
| return address; |
| } |
| |
| /** |
| * Get network prefix length |
| */ |
| public int getNetworkPrefix() { |
| return prefix; |
| } |
| |
| /** |
| * Implement the Parcelable interface |
| * @hide |
| */ |
| public int describeContents() { |
| return 0; |
| } |
| |
| /** |
| * Implement the Parcelable interface. |
| * @hide |
| */ |
| public void writeToParcel(Parcel dest, int flags) { |
| if (address != null) { |
| dest.writeByte((byte)1); |
| dest.writeByteArray(address.getAddress()); |
| dest.writeInt(prefix); |
| } else { |
| dest.writeByte((byte)0); |
| } |
| } |
| |
| /** |
| * Implement the Parcelable interface. |
| * @hide |
| */ |
| public static final Creator<LinkAddress> CREATOR = |
| new Creator<LinkAddress>() { |
| public LinkAddress createFromParcel(Parcel in) { |
| InetAddress address = null; |
| int prefix = 0; |
| if (in.readByte() == 1) { |
| try { |
| address = InetAddress.getByAddress(in.createByteArray()); |
| prefix = in.readInt(); |
| } catch (UnknownHostException e) { } |
| } |
| return new LinkAddress(address, prefix); |
| } |
| |
| public LinkAddress[] newArray(int size) { |
| return new LinkAddress[size]; |
| } |
| }; |
| } |