| /* |
| * 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.bgpio.protocol.linkstate; |
| |
| 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.bgpio.exceptions.BgpParseException; |
| import org.onosproject.bgpio.types.AreaIDTlv; |
| import org.onosproject.bgpio.types.AutonomousSystemTlv; |
| import org.onosproject.bgpio.types.BgpErrorType; |
| import org.onosproject.bgpio.types.BgpLSIdentifierTlv; |
| import org.onosproject.bgpio.types.BgpValueType; |
| import org.onosproject.bgpio.types.IsIsNonPseudonode; |
| import org.onosproject.bgpio.types.IsIsPseudonode; |
| import org.onosproject.bgpio.types.OSPFNonPseudonode; |
| import org.onosproject.bgpio.types.OSPFPseudonode; |
| import org.onosproject.bgpio.util.UnSupportedAttribute; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Provides Local and Remote NodeDescriptors which contains Node Descriptor Sub-TLVs. |
| */ |
| public class NodeDescriptors { |
| |
| /* |
| *Reference :draft-ietf-idr-ls-distribution-11 |
| 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 | Length | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | | |
| // Node Descriptor Sub-TLVs (variable) // |
| | | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| |
| Figure : Local or Remote Node Descriptors TLV format |
| */ |
| |
| private static final Logger log = LoggerFactory.getLogger(NodeDescriptors.class); |
| |
| public static final short LOCAL_NODE_DES_TYPE = 256; |
| public static final short REMOTE_NODE_DES_TYPE = 257; |
| public static final short IGP_ROUTERID_TYPE = 515; |
| public static final short IS_IS_LEVEL_1_PROTOCOL_ID = 1; |
| public static final short IS_IS_LEVEL_2_PROTOCOL_ID = 2; |
| public static final short OSPF_V2_PROTOCOL_ID = 3; |
| public static final short OSPF_V3_PROTOCOL_ID = 6; |
| public static final int TYPE_AND_LEN = 4; |
| public static final int ISISNONPSEUDONODE_LEN = 6; |
| public static final int ISISPSEUDONODE_LEN = 7; |
| public static final int OSPFNONPSEUDONODE_LEN = 4; |
| public static final int OSPFPSEUDONODE_LEN = 8; |
| private List<BgpValueType> subTlvs; |
| private short deslength; |
| private short desType; |
| |
| /** |
| * Resets parameters. |
| */ |
| public NodeDescriptors() { |
| this.subTlvs = null; |
| this.deslength = 0; |
| this.desType = 0; |
| } |
| |
| /** |
| * Constructor to initialize parameters. |
| * |
| * @param subTlvs list of subTlvs |
| * @param deslength Descriptors length |
| * @param desType local node descriptor or remote node descriptor type |
| */ |
| public NodeDescriptors(List<BgpValueType> subTlvs, short deslength, short desType) { |
| this.subTlvs = subTlvs; |
| this.deslength = deslength; |
| this.desType = desType; |
| } |
| |
| /** |
| * Returns list of subTlvs. |
| * |
| * @return subTlvs list of subTlvs |
| */ |
| public List<BgpValueType> getSubTlvs() { |
| return subTlvs; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(subTlvs.hashCode()); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| |
| if (obj instanceof NodeDescriptors) { |
| int countObjSubTlv = 0; |
| int countOtherSubTlv = 0; |
| boolean isCommonSubTlv = true; |
| NodeDescriptors other = (NodeDescriptors) obj; |
| Iterator<BgpValueType> objListIterator = other.subTlvs.iterator(); |
| countOtherSubTlv = other.subTlvs.size(); |
| countObjSubTlv = subTlvs.size(); |
| if (countObjSubTlv != countOtherSubTlv) { |
| return false; |
| } else { |
| while (objListIterator.hasNext() && isCommonSubTlv) { |
| BgpValueType subTlv = objListIterator.next(); |
| if (subTlvs.contains(subTlv) && other.subTlvs.contains(subTlv)) { |
| isCommonSubTlv = Objects.equals(subTlvs.get(subTlvs.indexOf(subTlv)), |
| other.subTlvs.get(other.subTlvs.indexOf(subTlv))); |
| } else { |
| isCommonSubTlv = false; |
| } |
| } |
| return isCommonSubTlv; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Reads node descriptors Sub-TLVs. |
| * |
| * @param cb ChannelBuffer |
| * @param desLength node descriptor length |
| * @param desType local node descriptor or remote node descriptor type |
| * @param protocolId protocol ID |
| * @return object of NodeDescriptors |
| * @throws BgpParseException while parsing node descriptors |
| */ |
| public static NodeDescriptors read(ChannelBuffer cb, short desLength, short desType, byte protocolId) |
| throws BgpParseException { |
| log.debug("Read NodeDescriptor"); |
| List<BgpValueType> subTlvs = new LinkedList<>(); |
| BgpValueType tlv = null; |
| |
| while (cb.readableBytes() > 0) { |
| ChannelBuffer tempBuf = cb.copy(); |
| short type = cb.readShort(); |
| short length = cb.readShort(); |
| if (cb.readableBytes() < length) { |
| throw new BgpParseException(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.OPTIONAL_ATTRIBUTE_ERROR, |
| tempBuf.readBytes(cb.readableBytes() + TYPE_AND_LEN)); |
| } |
| ChannelBuffer tempCb = cb.readBytes(length); |
| switch (type) { |
| case AutonomousSystemTlv.TYPE: |
| tlv = AutonomousSystemTlv.read(tempCb); |
| break; |
| case BgpLSIdentifierTlv.TYPE: |
| tlv = BgpLSIdentifierTlv.read(tempCb); |
| break; |
| case AreaIDTlv.TYPE: |
| tlv = AreaIDTlv.read(tempCb); |
| break; |
| case IGP_ROUTERID_TYPE: |
| if (protocolId == IS_IS_LEVEL_1_PROTOCOL_ID || protocolId == IS_IS_LEVEL_2_PROTOCOL_ID) { |
| boolean isNonPseudoNode = true; |
| if ((length == ISISPSEUDONODE_LEN) && (tempCb.getByte(ISISPSEUDONODE_LEN - 1) != 0)) { |
| isNonPseudoNode = false; |
| } |
| if (isNonPseudoNode) { |
| tlv = IsIsNonPseudonode.read(tempCb); |
| } else { |
| tlv = IsIsPseudonode.read(tempCb); |
| } |
| } else if (protocolId == OSPF_V2_PROTOCOL_ID || protocolId == OSPF_V3_PROTOCOL_ID) { |
| if (length == OSPFNONPSEUDONODE_LEN) { |
| tlv = OSPFNonPseudonode.read(tempCb); |
| } else if (length == OSPFPSEUDONODE_LEN) { |
| tlv = OSPFPseudonode.read(tempCb); |
| } |
| } |
| break; |
| default: |
| UnSupportedAttribute.skipBytes(tempCb, length); |
| } |
| subTlvs.add(tlv); |
| } |
| return new NodeDescriptors(subTlvs, desLength, desType); |
| } |
| |
| /** |
| * Returns node descriptors length. |
| * |
| * @return node descriptors length |
| */ |
| public short getLength() { |
| return this.deslength; |
| } |
| |
| /** |
| * Returns node descriptors type. |
| * |
| * @return node descriptors type |
| */ |
| public short getType() { |
| return this.desType; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("desType", desType) |
| .add("deslength", deslength) |
| .add("subTlvs", subTlvs) |
| .toString(); |
| } |
| |
| /** |
| * Compares this and o object. |
| * |
| * @param o object to be compared with this object |
| * @return which object is greater |
| */ |
| public int compareTo(Object o) { |
| if (this.equals(o)) { |
| return 0; |
| } |
| ListIterator<BgpValueType> listIterator = subTlvs.listIterator(); |
| int countOtherSubTlv = ((NodeDescriptors) o).subTlvs.size(); |
| int countObjSubTlv = subTlvs.size(); |
| boolean tlvFound = false; |
| if (countOtherSubTlv != countObjSubTlv) { |
| if (countOtherSubTlv > countObjSubTlv) { |
| return 1; |
| } else { |
| return -1; |
| } |
| } else { |
| while (listIterator.hasNext()) { |
| BgpValueType tlv1 = listIterator.next(); |
| log.debug("NodeDescriptor compare subtlv's"); |
| for (BgpValueType tlv : ((NodeDescriptors) o).subTlvs) { |
| if (tlv.getType() == tlv1.getType()) { |
| int result = subTlvs.get(subTlvs.indexOf(tlv1)).compareTo( |
| ((NodeDescriptors) o).subTlvs.get(((NodeDescriptors) o).subTlvs.indexOf(tlv))); |
| if (result != 0) { |
| return result; |
| } |
| tlvFound = true; |
| break; |
| } |
| } |
| if (!tlvFound) { |
| return 1; |
| } |
| } |
| } |
| return 0; |
| } |
| } |