| /* |
| * 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.ospf.protocol.lsa.types; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.base.Objects; |
| import com.google.common.primitives.Bytes; |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.ospf.controller.OspfLsaType; |
| import org.onosproject.ospf.exceptions.OspfErrorType; |
| import org.onosproject.ospf.exceptions.OspfParseException; |
| import org.onosproject.ospf.protocol.lsa.OpaqueLsaHeader; |
| import org.onosproject.ospf.protocol.lsa.TlvHeader; |
| import org.onosproject.ospf.protocol.lsa.tlvtypes.LinkTlv; |
| import org.onosproject.ospf.protocol.lsa.tlvtypes.OpaqueTopLevelTlvTypes; |
| import org.onosproject.ospf.protocol.lsa.tlvtypes.RouterTlv; |
| import org.onosproject.ospf.protocol.util.OspfParameters; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Representation of an Opaque LSA of type area local (10). |
| */ |
| public class OpaqueLsa10 extends OpaqueLsaHeader { |
| /* |
| 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 |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | LS age | Options | 9, 10 or 11 | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Opaque Type | Opaque ID | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Advertising Router | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | LS Sequence Number | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | LS checksum | Length | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | | |
| + + |
| | Opaque Information | |
| + + |
| | ... | |
| |
| Opaque LSA format |
| REFERENCE : RFC 5250 |
| */ |
| private List<TopLevelTlv> topLevelValues = new ArrayList<>(); |
| private byte[] opaqueInfo = null; |
| |
| /** |
| * Creates an instance of Opaque type 10 LSA. |
| * |
| * @param lsaHeader LSA header instance |
| */ |
| public OpaqueLsa10(OpaqueLsaHeader lsaHeader) { |
| populateHeader(lsaHeader); |
| } |
| |
| /** |
| * Returns the list of top level TLVs. |
| * |
| * @return list of top level TLVs |
| */ |
| public List<TopLevelTlv> topLevelValues() { |
| return topLevelValues; |
| } |
| |
| /** |
| * Adds TLV value. |
| * |
| * @param value TLV value |
| */ |
| public void addValue(TopLevelTlv value) { |
| topLevelValues.add(value); |
| } |
| |
| /** |
| * Reads from channel buffer and populate instance. |
| * |
| * @param channelBuffer channelBuffer instance |
| * @throws OspfParseException might throws exception while parsing buffer |
| */ |
| public void readFrom(ChannelBuffer channelBuffer) throws OspfParseException { |
| |
| try { |
| if (this.opaqueId() == OspfParameters.TRAFFIC_ENGINEERING) { |
| while (channelBuffer.readableBytes() > 0) { |
| TlvHeader tlvHeader = new TlvHeader(); |
| tlvHeader.setTlvType(channelBuffer.readUnsignedShort()); |
| tlvHeader.setTlvLength(channelBuffer.readUnsignedShort()); |
| if (tlvHeader.tlvType() == OpaqueTopLevelTlvTypes.ROUTER.value()) { |
| RouterTlv routerTlv = new RouterTlv(tlvHeader); |
| routerTlv.readFrom(channelBuffer.readBytes(tlvHeader.tlvLength())); |
| this.addValue(routerTlv); |
| } else if (tlvHeader.tlvType() == OpaqueTopLevelTlvTypes.LINK.value()) { |
| LinkTlv linkTlv = new LinkTlv(tlvHeader); |
| linkTlv.readFrom(channelBuffer.readBytes(tlvHeader.tlvLength())); |
| this.addValue(linkTlv); |
| } |
| } |
| } else { |
| int length = channelBuffer.readableBytes(); |
| opaqueInfo = new byte[length]; |
| channelBuffer.readBytes(opaqueInfo, 0, length); |
| } |
| |
| } catch (Exception e) { |
| log.debug("Error::OpaqueLsa10:: {}", e.getMessage()); |
| throw new OspfParseException(OspfErrorType.OSPF_MESSAGE_ERROR, |
| OspfErrorType.BAD_MESSAGE); |
| } |
| } |
| |
| /** |
| * Returns instance as bytes. |
| * |
| * @return instance as bytes |
| * @throws Exception might throws exception while parsing packet |
| */ |
| public byte[] asBytes() throws Exception { |
| |
| byte[] lsaMessage = null; |
| byte[] lsaHeader = getOpaqueLsaHeaderAsByteArray(); |
| byte[] lsaBody = getLsaBodyAsByteArray(); |
| lsaMessage = Bytes.concat(lsaHeader, lsaBody); |
| return lsaMessage; |
| |
| } |
| |
| /** |
| * Gets the LSA body as byte array. |
| * |
| * @return the lsa body as byte array |
| * @throws Exception might throws exception while parsing packet |
| */ |
| public byte[] getLsaBodyAsByteArray() throws Exception { |
| List<Byte> bodyLst = new ArrayList<>(); |
| if (this.opaqueId() == 1) { |
| for (TopLevelTlv tlv : this.topLevelValues) { |
| //Check the sub type of lsa and build bytes accordingly |
| if (tlv instanceof RouterTlv) { |
| RouterTlv routerTlv = (RouterTlv) tlv; |
| bodyLst.addAll(Bytes.asList(routerTlv.asBytes())); |
| } else if (tlv instanceof LinkTlv) { |
| LinkTlv linkTlv = (LinkTlv) tlv; |
| bodyLst.addAll(Bytes.asList(linkTlv.asBytes())); |
| } |
| } |
| } else { |
| return opaqueInfo; |
| } |
| |
| return Bytes.toArray(bodyLst); |
| } |
| |
| @Override |
| public OspfLsaType getOspfLsaType() { |
| return OspfLsaType.AREA_LOCAL_OPAQUE_LSA; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .omitNullValues() |
| .add("topLevelValues", topLevelValues) |
| .add("opaqueInfo", opaqueInfo) |
| .toString(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| OpaqueLsa10 that = (OpaqueLsa10) o; |
| return Objects.equal(topLevelValues, that.topLevelValues) && |
| Arrays.equals(opaqueInfo, that.opaqueInfo); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(opaqueInfo, topLevelValues); |
| } |
| } |