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author | Irfan Sheriff <isheriff@google.com> | 2010-10-01 16:08:28 -0700 |
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committer | Irfan Sheriff <isheriff@google.com> | 2010-10-06 11:04:05 -0700 |
commit | ed5d7d17c9e9837ce7a6a10698cce9f6e4101acd (patch) | |
tree | f92135dd4aea005231596dc69a813a88eb1ebf63 /core/java/android/net/LinkAddress.java | |
parent | 32e60fbea7888dcc4cb9612f27674888bb56f9c3 (diff) | |
download | frameworks_base-ed5d7d17c9e9837ce7a6a10698cce9f6e4101acd.zip frameworks_base-ed5d7d17c9e9837ce7a6a10698cce9f6e4101acd.tar.gz frameworks_base-ed5d7d17c9e9837ce7a6a10698cce9f6e4101acd.tar.bz2 |
Add LinkAddress
LinkAddress stores IP address + prefix for a network link
Change-Id: Id3e74e9d0a62121d097ebdc9be064eeea257ba1f
Diffstat (limited to 'core/java/android/net/LinkAddress.java')
-rw-r--r-- | core/java/android/net/LinkAddress.java | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/core/java/android/net/LinkAddress.java b/core/java/android/net/LinkAddress.java new file mode 100644 index 0000000..cb302da --- /dev/null +++ b/core/java/android/net/LinkAddress.java @@ -0,0 +1,149 @@ +/* + * 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]; + } + }; +} |