| /* |
| * 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.Inet4Address; |
| 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 InetAddress address; |
| |
| /** |
| * Network prefix length |
| */ |
| private int prefixLength; |
| |
| private void init(InetAddress address, int prefixLength) { |
| if (address == null || prefixLength < 0 || |
| ((address instanceof Inet4Address) && prefixLength > 32) || |
| (prefixLength > 128)) { |
| throw new IllegalArgumentException("Bad LinkAddress params " + address + |
| "/" + prefixLength); |
| } |
| this.address = address; |
| this.prefixLength = prefixLength; |
| } |
| |
| public LinkAddress(InetAddress address, int prefixLength) { |
| init(address, prefixLength); |
| } |
| |
| public LinkAddress(InterfaceAddress interfaceAddress) { |
| init(interfaceAddress.getAddress(), |
| interfaceAddress.getNetworkPrefixLength()); |
| } |
| |
| /** |
| * Constructs a new {@code LinkAddress} from a string such as "192.0.2.5/24" or |
| * "2001:db8::1/64". |
| * @param string The string to parse. |
| */ |
| public LinkAddress(String address) { |
| InetAddress inetAddress = null; |
| int prefixLength = -1; |
| try { |
| String [] pieces = address.split("/", 2); |
| prefixLength = Integer.parseInt(pieces[1]); |
| inetAddress = InetAddress.parseNumericAddress(pieces[0]); |
| } catch (NullPointerException e) { // Null string. |
| } catch (ArrayIndexOutOfBoundsException e) { // No prefix length. |
| } catch (NumberFormatException e) { // Non-numeric prefix. |
| } catch (IllegalArgumentException e) { // Invalid IP address. |
| } |
| |
| if (inetAddress == null || prefixLength == -1) { |
| throw new IllegalArgumentException("Bad LinkAddress params " + address); |
| } |
| |
| init(inetAddress, prefixLength); |
| } |
| |
| @Override |
| public String toString() { |
| return (address == null ? "" : (address.getHostAddress() + "/" + prefixLength)); |
| } |
| |
| /** |
| * Compares this {@code LinkAddress} instance against the specified address |
| * in {@code obj}. Two addresses are equal if their InetAddress and prefixLength |
| * 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.prefixLength == linkAddress.prefixLength; |
| } |
| |
| @Override |
| /* |
| * generate hashcode based on significant fields |
| */ |
| public int hashCode() { |
| return ((null == address) ? 0 : address.hashCode()) + prefixLength; |
| } |
| |
| /** |
| * Returns the InetAddress for this address. |
| */ |
| public InetAddress getAddress() { |
| return address; |
| } |
| |
| /** |
| * Get network prefix length |
| */ |
| public int getNetworkPrefixLength() { |
| return prefixLength; |
| } |
| |
| /** |
| * 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(prefixLength); |
| } 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 prefixLength = 0; |
| if (in.readByte() == 1) { |
| try { |
| address = InetAddress.getByAddress(in.createByteArray()); |
| prefixLength = in.readInt(); |
| } catch (UnknownHostException e) { } |
| } |
| return new LinkAddress(address, prefixLength); |
| } |
| |
| public LinkAddress[] newArray(int size) { |
| return new LinkAddress[size]; |
| } |
| }; |
| } |