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/*
* Copyright 2015 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();
}
}
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