| /* |
| * Copyright 2015-present Open Networking Laboratory |
| * |
| * 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. |
| */ |
| |
| /** |
| * @author b00295750 |
| * |
| */ |
| package org.onosproject.pcepio.types; |
| |
| import java.util.Objects; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.pcepio.protocol.PcepVersion; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Provides IPv4 Sub Object. |
| */ |
| public class IPv4SubObject implements PcepValueType { |
| |
| /*Reference : RFC 4874:3.1.1 |
| * 0 1 2 3 |
| 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |L| Type | Length | IPv4 address (4 bytes) | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | IPv4 address (continued) | Prefix Length | Resvd | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| */ |
| protected static final Logger log = LoggerFactory.getLogger(IPv4SubObject.class); |
| |
| public static final byte TYPE = 0x01; |
| public static final byte LENGTH = 8; |
| public static final byte VALUE_LENGTH = 6; |
| public static final byte OBJ_LENGTH = 8; |
| public static final byte LBIT = 0; |
| public static final int SHIFT_LBIT_POSITION = 7; |
| private int ipAddress; |
| private byte prefixLen; |
| private byte resvd; |
| |
| /** |
| * Constructor to initialize ipv4 address. |
| * |
| * @param ipAddr ipv4 address |
| */ |
| public IPv4SubObject(int ipAddr) { |
| this.ipAddress = ipAddr; |
| } |
| |
| /** |
| * constructor to initialize ipAddress, prefixLen and resvd. |
| * |
| * @param ipAddress ipv4 address |
| * @param prefixLen prefix length |
| * @param resvd reserved flags value |
| */ |
| public IPv4SubObject(int ipAddress, byte prefixLen, byte resvd) { |
| this.ipAddress = ipAddress; |
| this.prefixLen = prefixLen; |
| this.resvd = resvd; |
| } |
| |
| /** |
| * Returns a new instance of IPv4SubObject. |
| * |
| * @param ipAddress ipv4 address |
| * @param prefixLen prefix length |
| * @param resvd reserved flags value |
| * @return object of IPv4SubObject |
| */ |
| public static IPv4SubObject of(int ipAddress, byte prefixLen, byte resvd) { |
| return new IPv4SubObject(ipAddress, prefixLen, resvd); |
| } |
| |
| /** |
| * Returns prefixLen of IPv4 IP address. |
| * |
| * @return byte value of rawValue |
| */ |
| public byte getPrefixLen() { |
| return prefixLen; |
| } |
| |
| /** |
| * Returns value of IPv4 IP address. |
| * |
| * @return int value of ipv4 address |
| */ |
| public int getIpAddress() { |
| return ipAddress; |
| } |
| |
| @Override |
| public PcepVersion getVersion() { |
| return PcepVersion.PCEP_1; |
| } |
| |
| @Override |
| public short getType() { |
| return TYPE; |
| } |
| |
| @Override |
| public short getLength() { |
| return LENGTH; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(ipAddress, prefixLen, resvd); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof IPv4SubObject) { |
| IPv4SubObject other = (IPv4SubObject) obj; |
| return Objects.equals(this.ipAddress, other.ipAddress) && Objects.equals(this.prefixLen, other.prefixLen) |
| && Objects.equals(this.resvd, other.resvd); |
| } |
| return false; |
| } |
| |
| /** |
| * Reads the channel buffer and returns object of IPv4SubObject. |
| * |
| * @param c type of channel buffer |
| * @return object of IPv4SubObject |
| */ |
| public static PcepValueType read(ChannelBuffer c) { |
| int ipAddess = c.readInt(); |
| byte prefixLen = c.readByte(); |
| byte resvd = c.readByte(); |
| return new IPv4SubObject(ipAddess, prefixLen, resvd); |
| } |
| |
| @Override |
| public int write(ChannelBuffer c) { |
| int iLenStartIndex = c.writerIndex(); |
| byte bValue = LBIT; |
| bValue = (byte) (bValue << SHIFT_LBIT_POSITION); |
| bValue = (byte) (bValue | TYPE); |
| c.writeByte(bValue); |
| c.writeByte(OBJ_LENGTH); |
| c.writeInt(ipAddress); |
| c.writeByte(prefixLen); |
| c.writeByte(resvd); |
| |
| return c.writerIndex() - iLenStartIndex; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("Type", TYPE) |
| .add("Length", LENGTH) |
| .add("IPv4Address", ipAddress) |
| .add("PrefixLength", prefixLen) |
| .toString(); |
| } |
| } |