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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.
*/
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;
import com.google.common.base.MoreObjects.ToStringHelper;
/**
* NexthopIPv6addressTlv provides Ipv6 address of next hop.
*/
public class NexthopIPv6addressTlv implements PcepValueType {
/*
Reference: draft-zhao-pce-pcep-extension-for-pce-controller-01.
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type=TBD | Length = 20 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
// nexthop IPv6 address (16 bytes) //
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
NEXTHOP-IPV6-ADDRESS TLV:
*/
protected static final Logger log = LoggerFactory.getLogger(NexthopIPv6addressTlv.class);
public static final short TYPE = 100; //to be defined
//Length is header + value
public static final short LENGTH = 20;
public static final short VALUE_LENGTH = 16;
private static final byte[] NONE_VAL = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
public static final NexthopIPv6addressTlv NONE = new NexthopIPv6addressTlv(NONE_VAL);
private static final byte[] NO_MASK_VAL = {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF };
public static final NexthopIPv6addressTlv NO_MASK = new NexthopIPv6addressTlv(NO_MASK_VAL);
public static final NexthopIPv6addressTlv FULL_MASK = NONE;
private final byte[] rawValue;
/**
* Constructor to initialize IP address for next hop IPv6 address tlv.
*
* @param rawValue value of Next hop ipAddress
*/
public NexthopIPv6addressTlv(byte[] rawValue) {
log.debug("NexthopIPv6addressTlv");
this.rawValue = rawValue;
}
/**
* Creates next hop IPv6 address tlv.
*
* @param raw value of Next hop ipAddress
* @return object of NexthopIPv6addressTlv
*/
//logic to be checked
public static NexthopIPv6addressTlv of(final byte[] raw) {
//check NONE_VAL
boolean bFoundNONE = true;
//value starts from 3rd byte.
for (int i = 5; i < 20; ++i) {
if (NONE_VAL[i] != raw[i]) {
bFoundNONE = false;
}
}
if (bFoundNONE) {
return NONE;
}
//check NO_MASK_VAL
boolean bFoundNoMask = true;
//value starts from 3rd byte.
for (int i = 5; i < 20; ++i) {
if (0xFF != raw[i]) {
bFoundNoMask = false;
}
}
if (bFoundNoMask) {
return NO_MASK;
}
return new NexthopIPv6addressTlv(raw);
}
/**
* Returns next hop IPv6 address.
*
* @return next hop IPv6 address
*/
public byte[] getBytes() {
return rawValue;
}
@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(rawValue);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof NexthopIPv6addressTlv) {
NexthopIPv6addressTlv other = (NexthopIPv6addressTlv) obj;
return Objects.equals(this.rawValue, other.rawValue);
}
return false;
}
@Override
public int write(ChannelBuffer c) {
int iStartIndex = c.writerIndex();
c.writeShort(TYPE);
c.writeShort(LENGTH);
c.writeBytes(rawValue);
return c.writerIndex() - iStartIndex;
}
/**
* Reads the channel buffer and returns object of NexthopIPv6addressTlv.
*
* @param c type of channel buffer
* @return object of NexthopIPv6addressTlv
*/
public static NexthopIPv6addressTlv read(ChannelBuffer c) {
byte[] yTemp = new byte[20];
c.readBytes(yTemp, 0, 20);
return NexthopIPv6addressTlv.of(yTemp);
}
@Override
public String toString() {
ToStringHelper toStrHelper = MoreObjects.toStringHelper(getClass());
toStrHelper.add("Type", TYPE);
toStrHelper.add("Length", LENGTH);
StringBuffer result = new StringBuffer();
for (byte b : rawValue) {
result.append(String.format("%02X ", b));
}
toStrHelper.add("IpAddress", result);
return toStrHelper.toString();
}
}
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