Jian Li | 1270aea | 2016-09-15 13:32:24 +0900 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
Jian Li | 1270aea | 2016-09-15 13:32:24 +0900 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onlab.packet; |
| 17 | |
| 18 | import java.nio.ByteBuffer; |
| 19 | |
| 20 | /** |
| 21 | * Implements IP packet format. |
| 22 | */ |
| 23 | public abstract class IP extends BasePacket { |
| 24 | |
| 25 | /** |
| 26 | * Gets IP version number. |
| 27 | * |
| 28 | * @return IP version number |
| 29 | */ |
| 30 | public abstract byte getVersion(); |
| 31 | |
| 32 | /** |
| 33 | * Sets IP version number. |
| 34 | * |
| 35 | * @param version the version to set |
| 36 | * @return IP class |
| 37 | */ |
| 38 | public abstract IP setVersion(final byte version); |
| 39 | |
| 40 | /** |
| 41 | * Deserializer function for IP packets. |
| 42 | * |
| 43 | * @return deserializer function |
| 44 | */ |
| 45 | public static Deserializer<? extends IP> deserializer() { |
| 46 | return (data, offset, length) -> { |
| 47 | final ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| 48 | byte version = (byte) (bb.get() >> 4 & 0xf); |
| 49 | |
| 50 | switch (version) { |
| 51 | case 4: |
| 52 | return IPv4.deserializer().deserialize(data, offset, length); |
| 53 | case 6: |
| 54 | return IPv6.deserializer().deserialize(data, offset, length); |
| 55 | default: |
| 56 | throw new DeserializationException("Invalid IP version"); |
| 57 | } |
| 58 | }; |
| 59 | } |
| 60 | } |