diff options
Diffstat (limited to 'framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/TELinkDescriptorsTlv.java')
| -rw-r--r-- | framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/TELinkDescriptorsTlv.java | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/TELinkDescriptorsTlv.java b/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/TELinkDescriptorsTlv.java new file mode 100644 index 00000000..b974cf82 --- /dev/null +++ b/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/types/TELinkDescriptorsTlv.java @@ -0,0 +1,251 @@ +/* + * 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 - TLV_HEADER_LENGTH)); + + 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<>(); + + 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 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(); + } +} |