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/*
* 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 final InetAddress address;
/**
* Network prefix length
*/
private final int prefixLength;
public LinkAddress(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(InterfaceAddress interfaceAddress) {
this.address = interfaceAddress.getAddress();
this.prefixLength = interfaceAddress.getNetworkPrefixLength();
}
@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];
}
};
}
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