| /* |
| * 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.exceptions.OspfErrorType; |
| import org.onosproject.ospf.exceptions.OspfParseException; |
| import org.onosproject.ospf.protocol.lsa.LsaHeader; |
| import org.onosproject.ospf.protocol.lsa.subtypes.OspfLsaLink; |
| import org.onosproject.ospf.protocol.util.OspfUtil; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.net.InetAddress; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Representation of a Router LSA, and the fields and methods to access them. |
| */ |
| public class RouterLsa extends LsaHeader { |
| /* |
| 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 | 1 | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Link State ID | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Advertising Router | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | LS sequence number | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | LS checksum | length | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | 0 |V|E|B| 0 | # links | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Link ID | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Link Data | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Type | # TOS | metric | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | ... | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | TOS | 0 | TOS metric | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Link ID | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Link Data | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | ... | |
| */ |
| private static final Logger log = |
| LoggerFactory.getLogger(RouterLsa.class); |
| private boolean isVirtualEndPoint; |
| private boolean isAsBoundaryRouter; |
| private boolean isAreaBorderRouter; |
| private int noLink; |
| private List<OspfLsaLink> routerLinks = new ArrayList<>(); |
| |
| /** |
| * Creates an instance of Router LSA. |
| */ |
| public RouterLsa() { |
| } |
| |
| /** |
| * Creates an instance of Router LSA. |
| * |
| * @param lsaHeader lsa header instance |
| */ |
| public RouterLsa(LsaHeader lsaHeader) { |
| populateHeader(lsaHeader); |
| } |
| |
| /** |
| * Sets virtual endpoint or not. |
| * |
| * @param isVirtualEndPoint true or false |
| */ |
| public void setVirtualEndPoint(boolean isVirtualEndPoint) { |
| this.isVirtualEndPoint = isVirtualEndPoint; |
| } |
| |
| /** |
| * Sets if it is an AS boundary router or not. |
| * |
| * @param isAsBoundaryRouter true if AS boundary router else false |
| */ |
| public void setAsBoundaryRouter(boolean isAsBoundaryRouter) { |
| this.isAsBoundaryRouter = isAsBoundaryRouter; |
| } |
| |
| /** |
| * Sets whether it is an ABR or not. |
| * |
| * @param isAreaBorderRouter true if ABR else false |
| */ |
| public void setAreaBorderRouter(boolean isAreaBorderRouter) { |
| this.isAreaBorderRouter = isAreaBorderRouter; |
| } |
| |
| /** |
| * Gets number of links. |
| * |
| * @return number of links |
| */ |
| public int noLink() { |
| return noLink; |
| } |
| |
| /** |
| * Sets number of links. |
| * |
| * @param noLink number of links |
| */ |
| public void setNoLink(int noLink) { |
| this.noLink = noLink; |
| } |
| |
| |
| /** |
| * Adds router link. |
| * |
| * @param lsaLink LSA link |
| */ |
| public void addRouterLink(OspfLsaLink lsaLink) { |
| if (!this.routerLinks.contains(lsaLink)) { |
| this.routerLinks.add(lsaLink); |
| } |
| } |
| |
| /** |
| * Gets router link. |
| * |
| * @return routerLinks LSA link list |
| */ |
| public List<OspfLsaLink> routerLink() { |
| return this.routerLinks; |
| } |
| |
| /** |
| * Reads from channel buffer and populate this. |
| * |
| * @param channelBuffer channelBuffer instance. |
| * @throws OspfParseException might throws exception while parsing buffer |
| */ |
| public void readFrom(ChannelBuffer channelBuffer) throws OspfParseException { |
| |
| try { |
| int veb = channelBuffer.readByte(); |
| int unUsed = channelBuffer.readByte(); |
| //Convert the byte to veb bits |
| String strVeb = Integer.toBinaryString(veb); |
| if (strVeb.length() == 3) { |
| this.setVirtualEndPoint((Integer.parseInt(Character.toString(strVeb.charAt(0))) == 1) ? true : false); |
| this.setAsBoundaryRouter((Integer.parseInt(Character.toString(strVeb.charAt(1))) == 1) ? true : false); |
| this.setAreaBorderRouter((Integer.parseInt(Character.toString(strVeb.charAt(2))) == 1) ? true : false); |
| } else if (strVeb.length() == 2) { |
| this.setVirtualEndPoint(false); |
| this.setAsBoundaryRouter((Integer.parseInt(Character.toString(strVeb.charAt(0))) == 1) ? true : false); |
| this.setAreaBorderRouter((Integer.parseInt(Character.toString(strVeb.charAt(1))) == 1) ? true : false); |
| } else if (strVeb.length() == 1) { |
| this.setVirtualEndPoint(false); |
| this.setAsBoundaryRouter(false); |
| this.setAreaBorderRouter((Integer.parseInt(Character.toString(strVeb.charAt(0))) == 1) ? true : false); |
| } |
| this.setNoLink(channelBuffer.readUnsignedShort()); |
| while (channelBuffer.readableBytes() >= OspfUtil.TWELVE_BYTES) { |
| OspfLsaLink ospfLsaLink = new OspfLsaLink(); |
| |
| byte[] tempByteArray = new byte[OspfUtil.FOUR_BYTES]; |
| channelBuffer.readBytes(tempByteArray, 0, OspfUtil.FOUR_BYTES); |
| ospfLsaLink.setLinkId(InetAddress.getByAddress(tempByteArray).getHostName()); |
| tempByteArray = new byte[OspfUtil.FOUR_BYTES]; |
| channelBuffer.readBytes(tempByteArray, 0, OspfUtil.FOUR_BYTES); |
| ospfLsaLink.setLinkData(InetAddress.getByAddress(tempByteArray).getHostName()); |
| ospfLsaLink.setLinkType(channelBuffer.readByte()); |
| ospfLsaLink.setTos(channelBuffer.readByte()); |
| ospfLsaLink.setMetric(channelBuffer.readUnsignedShort()); |
| //add the link |
| this.addRouterLink(ospfLsaLink); |
| } |
| } catch (Exception e) { |
| log.debug("Error::RouterLsa:: {}", e.getMessage()); |
| throw new OspfParseException(OspfErrorType.OSPF_MESSAGE_ERROR, OspfErrorType.BAD_MESSAGE); |
| } |
| } |
| |
| /** |
| * Returns instance as bytes. |
| * |
| * @return instance as bytes |
| * @throws OspfParseException might throws exception while parsing packet |
| */ |
| public byte[] asBytes() throws OspfParseException { |
| byte[] lsaMessage = null; |
| |
| byte[] lsaHeader = getLsaHeaderAsByteArray(); |
| byte[] lsaBody = getLsaBodyAsByteArray(); |
| lsaMessage = Bytes.concat(lsaHeader, lsaBody); |
| |
| return lsaMessage; |
| } |
| |
| /** |
| * Gets the LSA body as bytes. |
| * |
| * @return LSA body as bytes |
| */ |
| public byte[] getLsaBodyAsByteArray() { |
| List<Byte> bodyLst = new ArrayList<>(); |
| |
| try { |
| int isVirtualEndPointVal = this.isVirtualEndPoint ? 1 : 0; |
| int isASBoundaryRouterVal = this.isAsBoundaryRouter ? 1 : 0; |
| int isAreaBorderRouterVal = this.isAreaBorderRouter ? 1 : 0; |
| |
| StringBuilder sb = new StringBuilder(); |
| sb.append(Integer.toBinaryString(isVirtualEndPointVal)); |
| sb.append(Integer.toBinaryString(isASBoundaryRouterVal)); |
| sb.append(Integer.toBinaryString(isAreaBorderRouterVal)); |
| |
| //added VEB |
| bodyLst.add((byte) Integer.parseInt(sb.toString(), 2)); |
| //second byte is 0. |
| bodyLst.add((byte) 0); |
| //Number of links |
| bodyLst.addAll(Bytes.asList(OspfUtil.convertToTwoBytes(this.noLink()))); |
| |
| //add each link details |
| for (OspfLsaLink lsaLink : routerLinks) { |
| bodyLst.addAll(Bytes.asList(InetAddress.getByName(lsaLink.linkId()).getAddress())); |
| bodyLst.addAll(Bytes.asList(InetAddress.getByName(lsaLink.linkData()).getAddress())); |
| bodyLst.add((byte) lsaLink.linkType()); |
| bodyLst.add((byte) lsaLink.tos()); |
| bodyLst.addAll(Bytes.asList(OspfUtil.convertToTwoBytes(lsaLink.metric()))); |
| } |
| } catch (Exception e) { |
| log.debug("Error::getLsrBodyAsByteArray {}", e.getMessage()); |
| return Bytes.toArray(bodyLst); |
| } |
| |
| return Bytes.toArray(bodyLst); |
| } |
| |
| /** |
| * Increment the link by 1. |
| */ |
| public void incrementLinkNo() { |
| this.noLink++; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .omitNullValues() |
| .add("isVirtualEndPoint", isVirtualEndPoint) |
| .add("isAsBoundaryRouter", isAsBoundaryRouter) |
| .add("isAreaBorderRouter", isAreaBorderRouter) |
| .add("noLink", noLink) |
| .add("routerLinks", routerLinks) |
| .toString(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| RouterLsa that = (RouterLsa) o; |
| return Objects.equal(isVirtualEndPoint, that.isVirtualEndPoint) && |
| Objects.equal(isAsBoundaryRouter, that.isAsBoundaryRouter) && |
| Objects.equal(isAreaBorderRouter, that.isAreaBorderRouter) && |
| Objects.equal(noLink, that.noLink) && |
| Objects.equal(routerLinks, that.routerLinks); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(isVirtualEndPoint, isAsBoundaryRouter, isAreaBorderRouter, |
| noLink, routerLinks); |
| } |
| } |