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/*
* Copyright (C) 2020 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.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.SystemApi;
import android.os.Parcel;
import android.os.Parcelable;
import java.net.InetAddress;
import java.util.Objects;
/**
* Represents the actual tcp keep alive packets which will be used for hardware offload.
* @hide
*/
@SystemApi
public final class TcpKeepalivePacketData extends KeepalivePacketData implements Parcelable {
private static final String TAG = "TcpKeepalivePacketData";
/**
* TCP sequence number.
* @hide
*/
public final int tcpSeq;
/**
* TCP ACK number.
* @hide
*/
public final int tcpAck;
/**
* TCP RCV window.
* @hide
*/
public final int tcpWindow;
/** TCP RCV window scale.
* @hide
*/
public final int tcpWindowScale;
/**
* IP TOS.
* @hide
*/
public final int ipTos;
/**
* IP TTL.
* @hide
*/
public final int ipTtl;
public TcpKeepalivePacketData(@NonNull final InetAddress srcAddress, int srcPort,
@NonNull final InetAddress dstAddress, int dstPort, @NonNull final byte[] data,
int tcpSeq, int tcpAck, int tcpWindow, int tcpWindowScale, int ipTos, int ipTtl)
throws InvalidPacketException {
super(srcAddress, srcPort, dstAddress, dstPort, data);
this.tcpSeq = tcpSeq;
this.tcpAck = tcpAck;
this.tcpWindow = tcpWindow;
this.tcpWindowScale = tcpWindowScale;
this.ipTos = ipTos;
this.ipTtl = ipTtl;
}
/**
* Get the TCP sequence number.
*
* See https://tools.ietf.org/html/rfc793#page-15.
*/
public int getTcpSeq() {
return tcpSeq;
}
/**
* Get the TCP ACK number.
*
* See https://tools.ietf.org/html/rfc793#page-15.
*/
public int getTcpAck() {
return tcpAck;
}
/**
* Get the TCP RCV window.
*
* See https://tools.ietf.org/html/rfc793#page-15.
*/
public int getTcpWindow() {
return tcpWindow;
}
/**
* Get the TCP RCV window scale.
*
* See https://tools.ietf.org/html/rfc793#page-15.
*/
public int getTcpWindowScale() {
return tcpWindowScale;
}
/**
* Get the IP type of service.
*/
public int getIpTos() {
return ipTos;
}
/**
* Get the IP TTL.
*/
public int getIpTtl() {
return ipTtl;
}
@Override
public boolean equals(@Nullable final Object o) {
if (!(o instanceof TcpKeepalivePacketData)) return false;
final TcpKeepalivePacketData other = (TcpKeepalivePacketData) o;
final InetAddress srcAddress = getSrcAddress();
final InetAddress dstAddress = getDstAddress();
return srcAddress.equals(other.getSrcAddress())
&& dstAddress.equals(other.getDstAddress())
&& getSrcPort() == other.getSrcPort()
&& getDstPort() == other.getDstPort()
&& this.tcpAck == other.tcpAck
&& this.tcpSeq == other.tcpSeq
&& this.tcpWindow == other.tcpWindow
&& this.tcpWindowScale == other.tcpWindowScale
&& this.ipTos == other.ipTos
&& this.ipTtl == other.ipTtl;
}
@Override
public int hashCode() {
return Objects.hash(getSrcAddress(), getDstAddress(), getSrcPort(), getDstPort(),
tcpAck, tcpSeq, tcpWindow, tcpWindowScale, ipTos, ipTtl);
}
/**
* Parcelable Implementation.
* Note that this object implements parcelable (and needs to keep doing this as it inherits
* from a class that does), but should usually be parceled as a stable parcelable using
* the toStableParcelable() and fromStableParcelable() methods.
*/
@Override
public int describeContents() {
return 0;
}
/** Write to parcel. */
@Override
public void writeToParcel(@NonNull Parcel out, int flags) {
out.writeString(getSrcAddress().getHostAddress());
out.writeString(getDstAddress().getHostAddress());
out.writeInt(getSrcPort());
out.writeInt(getDstPort());
out.writeByteArray(getPacket());
out.writeInt(tcpSeq);
out.writeInt(tcpAck);
out.writeInt(tcpWindow);
out.writeInt(tcpWindowScale);
out.writeInt(ipTos);
out.writeInt(ipTtl);
}
private static TcpKeepalivePacketData readFromParcel(Parcel in) throws InvalidPacketException {
InetAddress srcAddress = InetAddresses.parseNumericAddress(in.readString());
InetAddress dstAddress = InetAddresses.parseNumericAddress(in.readString());
int srcPort = in.readInt();
int dstPort = in.readInt();
byte[] packet = in.createByteArray();
int tcpSeq = in.readInt();
int tcpAck = in.readInt();
int tcpWnd = in.readInt();
int tcpWndScale = in.readInt();
int ipTos = in.readInt();
int ipTtl = in.readInt();
return new TcpKeepalivePacketData(srcAddress, srcPort, dstAddress, dstPort, packet, tcpSeq,
tcpAck, tcpWnd, tcpWndScale, ipTos, ipTtl);
}
/** Parcelable Creator. */
public static final @NonNull Parcelable.Creator<TcpKeepalivePacketData> CREATOR =
new Parcelable.Creator<TcpKeepalivePacketData>() {
public TcpKeepalivePacketData createFromParcel(Parcel in) {
try {
return readFromParcel(in);
} catch (InvalidPacketException e) {
throw new IllegalArgumentException(
"Invalid TCP keepalive data: " + e.getError());
}
}
public TcpKeepalivePacketData[] newArray(int size) {
return new TcpKeepalivePacketData[size];
}
};
@Override
public String toString() {
return "saddr: " + getSrcAddress()
+ " daddr: " + getDstAddress()
+ " sport: " + getSrcPort()
+ " dport: " + getDstPort()
+ " seq: " + tcpSeq
+ " ack: " + tcpAck
+ " window: " + tcpWindow
+ " windowScale: " + tcpWindowScale
+ " tos: " + ipTos
+ " ttl: " + ipTtl;
}
}
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