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/*
* Copyright (C) 2008 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 com.google.android.collect.Sets;
import java.util.HashSet;
/**
* Configuration details for a network interface.
*
* @hide
*/
public class InterfaceConfiguration implements Parcelable {
private String mHwAddr;
private LinkAddress mAddr;
private HashSet<String> mFlags = Sets.newHashSet();
private static final String FLAG_UP = "up";
private static final String FLAG_DOWN = "down";
@Override
public String toString() {
final StringBuilder builder = new StringBuilder();
builder.append("mHwAddr=").append(mHwAddr);
builder.append(" mAddr=").append(String.valueOf(mAddr));
builder.append(" mFlags=").append(getFlags());
return builder.toString();
}
public Iterable<String> getFlags() {
return mFlags;
}
public boolean hasFlag(String flag) {
validateFlag(flag);
return mFlags.contains(flag);
}
public void clearFlag(String flag) {
validateFlag(flag);
mFlags.remove(flag);
}
public void setFlag(String flag) {
validateFlag(flag);
mFlags.add(flag);
}
/**
* Set flags to mark interface as up.
*/
public void setInterfaceUp() {
mFlags.remove(FLAG_DOWN);
mFlags.add(FLAG_UP);
}
/**
* Set flags to mark interface as down.
*/
public void setInterfaceDown() {
mFlags.remove(FLAG_UP);
mFlags.add(FLAG_DOWN);
}
/**
* Set flags so that no changes will be made to the up/down status.
*/
public void ignoreInterfaceUpDownStatus() {
mFlags.remove(FLAG_UP);
mFlags.remove(FLAG_DOWN);
}
public LinkAddress getLinkAddress() {
return mAddr;
}
public void setLinkAddress(LinkAddress addr) {
mAddr = addr;
}
public String getHardwareAddress() {
return mHwAddr;
}
public void setHardwareAddress(String hwAddr) {
mHwAddr = hwAddr;
}
/**
* This function determines if the interface is up and has a valid IP
* configuration (IP address has a non zero octet).
*
* Note: It is supposed to be quick and hence should not initiate
* any network activity
*/
public boolean isActive() {
try {
if (isUp()) {
for (byte b : mAddr.getAddress().getAddress()) {
if (b != 0) return true;
}
}
} catch (NullPointerException e) {
return false;
}
return false;
}
public boolean isUp() {
return hasFlag(FLAG_UP);
}
/** {@inheritDoc} */
public int describeContents() {
return 0;
}
/** {@inheritDoc} */
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(mHwAddr);
if (mAddr != null) {
dest.writeByte((byte)1);
dest.writeParcelable(mAddr, flags);
} else {
dest.writeByte((byte)0);
}
dest.writeInt(mFlags.size());
for (String flag : mFlags) {
dest.writeString(flag);
}
}
public static final Creator<InterfaceConfiguration> CREATOR = new Creator<
InterfaceConfiguration>() {
public InterfaceConfiguration createFromParcel(Parcel in) {
InterfaceConfiguration info = new InterfaceConfiguration();
info.mHwAddr = in.readString();
if (in.readByte() == 1) {
info.mAddr = in.readParcelable(null);
}
final int size = in.readInt();
for (int i = 0; i < size; i++) {
info.mFlags.add(in.readString());
}
return info;
}
public InterfaceConfiguration[] newArray(int size) {
return new InterfaceConfiguration[size];
}
};
private static void validateFlag(String flag) {
if (flag.indexOf(' ') >= 0) {
throw new IllegalArgumentException("flag contains space: " + flag);
}
}
}
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