| /* |
| * Copyright (C) 2019 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 com.android.ike.ikev2.message; |
| |
| import com.android.ike.ikev2.exceptions.IkeException; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * IkeTsPayload represents an Traffic Selector Initiator Payload or an Traffic Selector Responder |
| * Payload. |
| * |
| * <p>Traffic Selector Initiator Payload and Traffic Selector Responder Payload have same format but |
| * different payload types. They describe the address ranges and port ranges of Child SA initiator |
| * and Child SA responder. |
| * |
| * @see <a href="https://tools.ietf.org/html/rfc7296#section-3.13">RFC 7296, Internet Key Exchange |
| * Protocol Version 2 (IKEv2)</a> |
| */ |
| public final class IkeTsPayload extends IkePayload { |
| // Length of reserved field in octets. |
| private static final int TS_HEADER_RESERVED_LEN = 3; |
| |
| /** Number of Traffic Selectors */ |
| public final int numTs; |
| |
| IkeTsPayload(boolean critical, byte[] payloadBody, boolean isInitiator) throws IkeException { |
| super((isInitiator ? PAYLOAD_TYPE_TS_INITIATOR : PAYLOAD_TYPE_TS_RESPONDER), critical); |
| |
| ByteBuffer inputBuffer = ByteBuffer.wrap(payloadBody); |
| numTs = Byte.toUnsignedInt(inputBuffer.get()); |
| // Skip RESERVED byte |
| inputBuffer.get(new byte[TS_HEADER_RESERVED_LEN]); |
| |
| // TODO: Decode Traffic Selectors. |
| } |
| |
| /** |
| * Encode Traffic Selector Payload to ByteBuffer. |
| * |
| * @param nextPayload type of payload that follows this payload. |
| * @param byteBuffer destination ByteBuffer that stores encoded payload. |
| */ |
| @Override |
| protected void encodeToByteBuffer(@PayloadType int nextPayload, ByteBuffer byteBuffer) { |
| throw new UnsupportedOperationException( |
| "It is not supported to encode a " + getTypeString()); |
| //TODO: Implement it. |
| } |
| |
| /** |
| * Get entire payload length. |
| * |
| * @return entire payload length. |
| */ |
| @Override |
| protected int getPayloadLength() { |
| throw new UnsupportedOperationException( |
| "It is not supported to get payload length of " + getTypeString()); |
| //TODO: Implement it. |
| } |
| |
| /** |
| * Return the payload type as a String. |
| * |
| * @return the payload type as a String. |
| */ |
| @Override |
| public String getTypeString() { |
| switch (payloadType) { |
| case PAYLOAD_TYPE_ID_INITIATOR: |
| return "Traffic Selector Initiator Payload"; |
| case PAYLOAD_TYPE_ID_RESPONDER: |
| return "Traffic Selector Responder Payload"; |
| default: |
| // Won't reach here. |
| throw new IllegalArgumentException( |
| "Invalid Payload Type for Traffic Selector Payload."); |
| } |
| } |
| } |