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/*
* Copyright (C) 2017 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 android.util.Log;
import java.net.InetAddress;
import java.net.UnknownHostException;
/** @hide */
public final class IpSecConfig implements Parcelable {
private static final String TAG = "IpSecConfig";
//MODE_TRANSPORT or MODE_TUNNEL
int mode;
// For tunnel mode
InetAddress localAddress;
InetAddress remoteAddress;
// Limit selection by network interface
Network network;
public static class Flow {
// Minimum requirements for identifying a transform
// SPI identifying the IPsec flow in packet processing
// and a remote IP address
int spiResourceId;
// Encryption Algorithm
IpSecAlgorithm encryption;
// Authentication Algorithm
IpSecAlgorithm authentication;
}
Flow[] flow = new Flow[] {new Flow(), new Flow()};
// For tunnel mode IPv4 UDP Encapsulation
// IpSecTransform#ENCAP_ESP_*, such as ENCAP_ESP_OVER_UDP_IKE
int encapType;
int encapLocalPortResourceId;
int encapRemotePort;
// An interval, in seconds between the NattKeepalive packets
int nattKeepaliveInterval;
// Transport or Tunnel
public int getMode() {
return mode;
}
public InetAddress getLocalAddress() {
return localAddress;
}
public int getSpiResourceId(int direction) {
return flow[direction].spiResourceId;
}
public InetAddress getRemoteAddress() {
return remoteAddress;
}
public IpSecAlgorithm getEncryption(int direction) {
return flow[direction].encryption;
}
public IpSecAlgorithm getAuthentication(int direction) {
return flow[direction].authentication;
}
public Network getNetwork() {
return network;
}
public int getEncapType() {
return encapType;
}
public int getEncapLocalResourceId() {
return encapLocalPortResourceId;
}
public int getEncapRemotePort() {
return encapRemotePort;
}
public int getNattKeepaliveInterval() {
return nattKeepaliveInterval;
}
// Parcelable Methods
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel out, int flags) {
// TODO: Use a byte array or other better method for storing IPs that can also include scope
out.writeString((localAddress != null) ? localAddress.getHostAddress() : null);
// TODO: Use a byte array or other better method for storing IPs that can also include scope
out.writeString((remoteAddress != null) ? remoteAddress.getHostAddress() : null);
out.writeParcelable(network, flags);
out.writeInt(flow[IpSecTransform.DIRECTION_IN].spiResourceId);
out.writeParcelable(flow[IpSecTransform.DIRECTION_IN].encryption, flags);
out.writeParcelable(flow[IpSecTransform.DIRECTION_IN].authentication, flags);
out.writeInt(flow[IpSecTransform.DIRECTION_OUT].spiResourceId);
out.writeParcelable(flow[IpSecTransform.DIRECTION_OUT].encryption, flags);
out.writeParcelable(flow[IpSecTransform.DIRECTION_OUT].authentication, flags);
out.writeInt(encapType);
out.writeInt(encapLocalPortResourceId);
out.writeInt(encapRemotePort);
}
// Package Private: Used by the IpSecTransform.Builder;
// there should be no public constructor for this object
IpSecConfig() {}
private static InetAddress readInetAddressFromParcel(Parcel in) {
String addrString = in.readString();
if (addrString == null) {
return null;
}
try {
return InetAddress.getByName(addrString);
} catch (UnknownHostException e) {
Log.wtf(TAG, "Invalid IpAddress " + addrString);
return null;
}
}
private IpSecConfig(Parcel in) {
localAddress = readInetAddressFromParcel(in);
remoteAddress = readInetAddressFromParcel(in);
network = (Network) in.readParcelable(Network.class.getClassLoader());
flow[IpSecTransform.DIRECTION_IN].spiResourceId = in.readInt();
flow[IpSecTransform.DIRECTION_IN].encryption =
(IpSecAlgorithm) in.readParcelable(IpSecAlgorithm.class.getClassLoader());
flow[IpSecTransform.DIRECTION_IN].authentication =
(IpSecAlgorithm) in.readParcelable(IpSecAlgorithm.class.getClassLoader());
flow[IpSecTransform.DIRECTION_OUT].spiResourceId = in.readInt();
flow[IpSecTransform.DIRECTION_OUT].encryption =
(IpSecAlgorithm) in.readParcelable(IpSecAlgorithm.class.getClassLoader());
flow[IpSecTransform.DIRECTION_OUT].authentication =
(IpSecAlgorithm) in.readParcelable(IpSecAlgorithm.class.getClassLoader());
encapType = in.readInt();
encapLocalPortResourceId = in.readInt();
encapRemotePort = in.readInt();
}
public static final Parcelable.Creator<IpSecConfig> CREATOR =
new Parcelable.Creator<IpSecConfig>() {
public IpSecConfig createFromParcel(Parcel in) {
return new IpSecConfig(in);
}
public IpSecConfig[] newArray(int size) {
return new IpSecConfig[size];
}
};
}
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