/* | |
* 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.Iterator; | |
import java.util.LinkedList; | |
import java.util.ListIterator; | |
import java.util.Objects; | |
import org.jboss.netty.buffer.ChannelBuffer; | |
import org.onosproject.pcepio.exceptions.PcepParseException; | |
import org.onosproject.pcepio.protocol.PcepVersion; | |
import org.slf4j.Logger; | |
import org.slf4j.LoggerFactory; | |
import com.google.common.base.MoreObjects; | |
/** | |
* Provides TE Link Descriptors TLV. | |
*/ | |
public class TELinkDescriptorsTLV implements PcepValueType { | |
/* | |
* Reference: PCEP Extension for Transporting TE Data draft-dhodylee-pce-pcep-te-data-extn-02 | |
* 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=[TBD14] | Length | | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| | | |
// Link Descriptor Sub-TLVs (variable) // | |
| | | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
*/ | |
protected static final Logger log = LoggerFactory.getLogger(TELinkDescriptorsTLV.class); | |
public static final short TYPE = 1070; //TODD:change this TBD14 | |
public short hLength; | |
public static final int TLV_HEADER_LENGTH = 4; | |
// LinkDescriptors Sub-TLVs (variable) | |
private LinkedList<PcepValueType> llLinkDescriptorsSubTLVs; | |
/** | |
* Constructor to initialize llLinkDescriptorsSubTLVs. | |
* | |
* @param llLinkDescriptorsSubTLVs of PcepValueType | |
*/ | |
public TELinkDescriptorsTLV(LinkedList<PcepValueType> llLinkDescriptorsSubTLVs) { | |
this.llLinkDescriptorsSubTLVs = llLinkDescriptorsSubTLVs; | |
} | |
/** | |
* Returns object of TELinkDescriptorsTLV. | |
* | |
* @param llLinkDescriptorsSubTLVs of PcepValueType | |
* @return object of TELinkDescriptorsTLV | |
*/ | |
public static TELinkDescriptorsTLV of(final LinkedList<PcepValueType> llLinkDescriptorsSubTLVs) { | |
return new TELinkDescriptorsTLV(llLinkDescriptorsSubTLVs); | |
} | |
/** | |
* Returns linked list of Link Attribute of Sub TLV. | |
* | |
* @return llLinkDescriptorsSubTLVs linked list of Link Attribute of Sub TLV | |
*/ | |
public LinkedList<PcepValueType> getllLinkDescriptorsSubTLVs() { | |
return llLinkDescriptorsSubTLVs; | |
} | |
@Override | |
public PcepVersion getVersion() { | |
return PcepVersion.PCEP_1; | |
} | |
@Override | |
public short getType() { | |
return TYPE; | |
} | |
@Override | |
public short getLength() { | |
return hLength; | |
} | |
@Override | |
public int hashCode() { | |
return Objects.hash(llLinkDescriptorsSubTLVs.hashCode()); | |
} | |
@Override | |
public boolean equals(Object obj) { | |
if (this == obj) { | |
return true; | |
} | |
/* | |
* Here we have a list of Tlv so to compare each sub tlv between the object | |
* we have to take a list iterator so one by one we can get each sub tlv object | |
* and can compare them. | |
* it may be possible that the size of 2 lists is not equal so we have to first check | |
* the size, if both are same then we should check for the subtlv objects otherwise | |
* we should return false. | |
*/ | |
if (obj instanceof TELinkDescriptorsTLV) { | |
int countObjSubTlv = 0; | |
int countOtherSubTlv = 0; | |
boolean isCommonSubTlv = true; | |
TELinkDescriptorsTLV other = (TELinkDescriptorsTLV) obj; | |
Iterator<PcepValueType> objListIterator = ((TELinkDescriptorsTLV) obj).llLinkDescriptorsSubTLVs.iterator(); | |
countObjSubTlv = ((TELinkDescriptorsTLV) obj).llLinkDescriptorsSubTLVs.size(); | |
countOtherSubTlv = other.llLinkDescriptorsSubTLVs.size(); | |
if (countObjSubTlv != countOtherSubTlv) { | |
return false; | |
} else { | |
while (objListIterator.hasNext() && isCommonSubTlv) { | |
PcepValueType subTlv = objListIterator.next(); | |
isCommonSubTlv = Objects.equals(llLinkDescriptorsSubTLVs.contains(subTlv), | |
other.llLinkDescriptorsSubTLVs.contains(subTlv)); | |
} | |
return isCommonSubTlv; | |
} | |
} | |
return false; | |
} | |
@Override | |
public int write(ChannelBuffer c) { | |
int tlvStartIndex = c.writerIndex(); | |
c.writeShort(TYPE); | |
int tlvLenIndex = c.writerIndex(); | |
hLength = 0; | |
c.writeShort(hLength); | |
ListIterator<PcepValueType> listIterator = llLinkDescriptorsSubTLVs.listIterator(); | |
while (listIterator.hasNext()) { | |
PcepValueType tlv = listIterator.next(); | |
tlv.write(c); | |
// need to take care of padding | |
int pad = tlv.getLength() % 4; | |
if (0 != pad) { | |
pad = 4 - pad; | |
for (int i = 0; i < pad; ++i) { | |
c.writeByte((byte) 0); | |
} | |
} | |
} | |
hLength = (short) (c.writerIndex() - tlvStartIndex); | |
c.setShort(tlvLenIndex, hLength); | |
return c.writerIndex() - tlvStartIndex; | |
} | |
/** | |
* Reads channel buffer and returns object of TELinkDescriptorsTLV. | |
* | |
* @param c input channel buffer | |
* @param length length | |
* @return object of TELinkDescriptorsTLV | |
* @throws PcepParseException if mandatory fields are missing | |
*/ | |
public static PcepValueType read(ChannelBuffer c, short length) throws PcepParseException { | |
// Node Descriptor Sub-TLVs (variable) | |
LinkedList<PcepValueType> llLinkDescriptorsSubTLVs = new LinkedList<PcepValueType>(); | |
ChannelBuffer tempCb = c.readBytes(length - TLV_HEADER_LENGTH); | |
while (TLV_HEADER_LENGTH <= tempCb.readableBytes()) { | |
PcepValueType tlv; | |
short hType = tempCb.readShort(); | |
int iValue = 0; | |
short hLength = tempCb.readShort(); | |
log.debug("sub Tlv Length" + hLength); | |
switch (hType) { | |
case LinkLocalRemoteIdentifiersTlv.TYPE: | |
tlv = LinkLocalRemoteIdentifiersTlv.read(tempCb); | |
break; | |
case IPv4InterfaceAddressTlv.TYPE: | |
iValue = tempCb.readInt(); | |
tlv = new IPv4InterfaceAddressTlv(iValue); | |
break; | |
case IPv4NeighborAddressTlv.TYPE: | |
iValue = tempCb.readInt(); | |
tlv = new IPv4NeighborAddressTlv(iValue); | |
break; | |
case IPv6InterfaceAddressTlv.TYPE: | |
byte[] ipv6Value = new byte[IPv6InterfaceAddressTlv.VALUE_LENGTH]; | |
tempCb.readBytes(ipv6Value, 0, IPv6InterfaceAddressTlv.VALUE_LENGTH); | |
tlv = new IPv6InterfaceAddressTlv(ipv6Value); | |
break; | |
case IPv6NeighborAddressTlv.TYPE: | |
byte[] ipv6NeighborAdd = new byte[IPv6NeighborAddressTlv.VALUE_LENGTH]; | |
tempCb.readBytes(ipv6NeighborAdd, 0, IPv6NeighborAddressTlv.VALUE_LENGTH); | |
tlv = new IPv6NeighborAddressTlv(ipv6NeighborAdd); | |
break; | |
default: | |
throw new PcepParseException("Unsupported Sub TLV type:" + hType); | |
} | |
// Check for the padding | |
int pad = hLength % 4; | |
if (0 < pad) { | |
pad = 4 - pad; | |
if (pad <= tempCb.readableBytes()) { | |
tempCb.skipBytes(pad); | |
} | |
} | |
llLinkDescriptorsSubTLVs.add(tlv); | |
} | |
if (0 < tempCb.readableBytes()) { | |
throw new PcepParseException("Sub Tlv parsing error. Extra bytes received."); | |
} | |
return new TELinkDescriptorsTLV(llLinkDescriptorsSubTLVs); | |
} | |
@Override | |
public String toString() { | |
return MoreObjects.toStringHelper(getClass()).add("Type", TYPE).add("Length", hLength) | |
.add("LinkDescriptorsSubTLVs", llLinkDescriptorsSubTLVs).toString(); | |
} | |
} |