| /* |
| * Copyright 2016-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. |
| */ |
| package org.onosproject.pcepio.types; |
| |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| 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 LinkDescriptorsTlv implements PcepValueType { |
| |
| /* |
| * Reference: draft-dhodylee-pce-pcep-ls-01, section 9.2.6. |
| * 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(LinkDescriptorsTlv.class); |
| |
| public static final short TYPE = (short) 65284; |
| public short hLength; |
| |
| public static final int TLV_HEADER_LENGTH = 4; |
| |
| // LinkDescriptors Sub-TLVs (variable) |
| private List<PcepValueType> llLinkDescriptorsSubTLVs; |
| |
| /** |
| * Constructor to initialize llLinkDescriptorsSubTLVs. |
| * |
| * @param llLinkDescriptorsSubTLVs of PcepValueType |
| */ |
| public LinkDescriptorsTlv(List<PcepValueType> llLinkDescriptorsSubTLVs) { |
| this.llLinkDescriptorsSubTLVs = llLinkDescriptorsSubTLVs; |
| } |
| |
| /** |
| * Returns object of LinkDescriptorsTlv. |
| * |
| * @param llLinkDescriptorsSubTLVs of PcepValueType |
| * @return object of LinkDescriptorsTlv |
| */ |
| public static LinkDescriptorsTlv of(final List<PcepValueType> llLinkDescriptorsSubTLVs) { |
| return new LinkDescriptorsTlv(llLinkDescriptorsSubTLVs); |
| } |
| |
| /** |
| * Returns linked list of Link Attribute of Sub TLV. |
| * |
| * @return llLinkDescriptorsSubTLVs linked list of Link Attribute of Sub TLV |
| */ |
| public List<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 LinkDescriptorsTlv) { |
| int countObjSubTlv = 0; |
| int countOtherSubTlv = 0; |
| boolean isCommonSubTlv = true; |
| LinkDescriptorsTlv other = (LinkDescriptorsTlv) obj; |
| Iterator<PcepValueType> objListIterator = ((LinkDescriptorsTlv) obj).llLinkDescriptorsSubTLVs.iterator(); |
| countObjSubTlv = ((LinkDescriptorsTlv) 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 - TLV_HEADER_LENGTH)); |
| |
| return c.writerIndex() - tlvStartIndex; |
| } |
| |
| /** |
| * Reads channel buffer and returns object of LinkDescriptorsTlv. |
| * |
| * @param c input channel buffer |
| * @param length length |
| * @return object of LinkDescriptorsTlv |
| * @throws PcepParseException if mandatory fields are missing |
| */ |
| public static PcepValueType read(ChannelBuffer c, short length) throws PcepParseException { |
| |
| // Node Descriptor Sub-TLVs (variable) |
| List<PcepValueType> llLinkDescriptorsSubTLVs = new LinkedList<>(); |
| |
| ChannelBuffer tempCb = c.readBytes(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 LinkLocalRemoteIdentifiersSubTlv.TYPE: |
| tlv = LinkLocalRemoteIdentifiersSubTlv.read(tempCb); |
| break; |
| case IPv4InterfaceAddressSubTlv.TYPE: |
| iValue = tempCb.readInt(); |
| tlv = new IPv4InterfaceAddressSubTlv(iValue); |
| break; |
| case IPv4NeighborAddressSubTlv.TYPE: |
| iValue = tempCb.readInt(); |
| tlv = new IPv4NeighborAddressSubTlv(iValue); |
| break; |
| case IPv6InterfaceAddressSubTlv.TYPE: |
| byte[] ipv6Value = new byte[IPv6InterfaceAddressSubTlv.VALUE_LENGTH]; |
| tempCb.readBytes(ipv6Value, 0, IPv6InterfaceAddressSubTlv.VALUE_LENGTH); |
| tlv = new IPv6InterfaceAddressSubTlv(ipv6Value); |
| break; |
| case IPv6NeighborAddressSubTlv.TYPE: |
| byte[] ipv6NeighborAdd = new byte[IPv6NeighborAddressSubTlv.VALUE_LENGTH]; |
| tempCb.readBytes(ipv6NeighborAdd, 0, IPv6NeighborAddressSubTlv.VALUE_LENGTH); |
| tlv = new IPv6NeighborAddressSubTlv(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 LinkDescriptorsTlv(llLinkDescriptorsSubTLVs); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("Type", TYPE) |
| .add("Length", hLength) |
| .add("LinkDescriptorsSubTLVs", llLinkDescriptorsSubTLVs) |
| .toString(); |
| } |
| } |