| /* |
| * 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.isis.io.isispacket.tlv; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.primitives.Bytes; |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.isis.io.isispacket.tlv.subtlv.SubTlvFinder; |
| import org.onosproject.isis.io.isispacket.tlv.subtlv.SubTlvToBytes; |
| import org.onosproject.isis.io.isispacket.tlv.subtlv.SubTlvType; |
| import org.onosproject.isis.io.isispacket.tlv.subtlv.TrafficEngineeringSubTlv; |
| import org.onosproject.isis.io.util.IsisUtil; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Representation of IP extended reachability TLV. |
| */ |
| public class IpExtendedReachabilityTlv extends TlvHeader implements IsisTlv { |
| |
| private boolean down; |
| private boolean subTlvPresence; |
| private int prefixLength; |
| private int metric; |
| private byte subTlvLength; |
| private String prefix; |
| private List<TrafficEngineeringSubTlv> trafEnginSubTlv = new ArrayList<>(); |
| |
| /** |
| * Creates an instance of IP external reachability TLV. |
| * |
| * @param tlvHeader TLV header |
| */ |
| public IpExtendedReachabilityTlv(TlvHeader tlvHeader) { |
| this.setTlvType(tlvHeader.tlvType()); |
| this.setTlvLength(tlvHeader.tlvLength()); |
| } |
| |
| /** |
| * Returns list of traffic engineering sub tlvs. |
| * |
| * @return trafEnginSubTlv |
| */ |
| public List<TrafficEngineeringSubTlv> teTlvs() { |
| return this.trafEnginSubTlv; |
| } |
| |
| /** |
| * Returns the prefix of IP external reachability TLV. |
| * |
| * @return prefix |
| */ |
| public String prefix() { |
| return prefix; |
| } |
| |
| /** |
| * Sets the prefix of IP external reachability TLV. |
| * |
| * @param prefix prefix |
| */ |
| public void setPrefix(String prefix) { |
| this.prefix = prefix; |
| } |
| |
| /** |
| * Returns if down true else false of IP external reachability TLV. |
| * |
| * @return if down true else false |
| */ |
| public boolean isDown() { |
| return down; |
| } |
| |
| /** |
| * Sets if down true else false of IP external reachability TLV. |
| * |
| * @param upOrDown if down true else false |
| */ |
| public void setDown(boolean upOrDown) { |
| this.down = upOrDown; |
| } |
| |
| /** |
| * Returns true if sub TLV present else false of IP external reachability TLV. |
| * |
| * @return true if present else false |
| */ |
| public boolean isSubTlvPresence() { |
| return subTlvPresence; |
| } |
| |
| /** |
| * Sets true if sub TLV present else false of IP external reachability TLV. |
| * |
| * @param subTlvPresence true if present else false |
| */ |
| public void setSubTlvPresence(boolean subTlvPresence) { |
| this.subTlvPresence = subTlvPresence; |
| } |
| |
| /** |
| * Sets the prefix length of IP external reachability TLV. |
| * |
| * @return prefix length |
| */ |
| public int prefixLength() { |
| return prefixLength; |
| } |
| |
| /** |
| * Returns the prefix length of IP external reachability TLV. |
| * |
| * @param prefixLength the prefix length of IP external reachability TLV |
| */ |
| public void setPrefixLength(int prefixLength) { |
| this.prefixLength = prefixLength; |
| } |
| |
| /** |
| * Adds the traffic engineering sub TLV to IP external reachability TLV. |
| * |
| * @param trafEnginSubTlv traffic engineering sub TLV |
| */ |
| public void addSubTlv(TrafficEngineeringSubTlv trafEnginSubTlv) { |
| this.trafEnginSubTlv.add(trafEnginSubTlv); |
| } |
| |
| /** |
| * Returns the sub TLV length of IP external reachability TLV. |
| * |
| * @return sub TLV length |
| */ |
| public byte subTlvLength() { |
| return subTlvLength; |
| } |
| |
| /** |
| * Sets the sub TLV length for IP external reachability TLV. |
| * |
| * @param subTlvLength sub TLV length |
| */ |
| public void setSubTlvLength(byte subTlvLength) { |
| this.subTlvLength = subTlvLength; |
| } |
| |
| /** |
| * Returns metric of IP external reachability TLV. |
| * |
| * @return metric |
| */ |
| public int metric() { |
| return metric; |
| } |
| |
| /** |
| * Sets default metric for IP external reachability TLV. |
| * |
| * @param metric default metric |
| */ |
| public void setMetric(int metric) { |
| this.metric = metric; |
| } |
| |
| @Override |
| public void readFrom(ChannelBuffer channelBuffer) { |
| this.setMetric(channelBuffer.readInt()); |
| int controlInfo = channelBuffer.readByte(); |
| byte[] tempByteArray = null; |
| |
| String string = IsisUtil.toEightBitBinary(Integer.toBinaryString(controlInfo)); |
| if (string.charAt(0) == '0') { |
| this.setDown(false); |
| } |
| if (string.charAt(1) == '1') { |
| this.setSubTlvPresence(true); |
| } |
| this.setPrefixLength(Integer.parseInt(string.substring(2, string.length()), 2)); |
| if (this.prefixLength >= 0 && this.prefixLength <= 8) { |
| channelBuffer.readByte(); |
| } else if (this.prefixLength >= 8 && this.prefixLength <= 16) { |
| tempByteArray = new byte[IsisUtil.TWO_BYTES]; |
| channelBuffer.readBytes(tempByteArray, 0, IsisUtil.TWO_BYTES); |
| this.setPrefix(IsisUtil.prefixConversion(tempByteArray)); |
| } else if (this.prefixLength >= 17 && this.prefixLength <= 24) { |
| tempByteArray = new byte[IsisUtil.THREE_BYTES]; |
| channelBuffer.readBytes(tempByteArray, 0, IsisUtil.THREE_BYTES); |
| this.setPrefix(IsisUtil.prefixConversion(tempByteArray)); |
| } else if (this.prefixLength >= 24 && this.prefixLength <= 32) { |
| tempByteArray = new byte[IsisUtil.FOUR_BYTES]; |
| channelBuffer.readBytes(tempByteArray, 0, IsisUtil.FOUR_BYTES); |
| this.setPrefix(IsisUtil.prefixConversion(tempByteArray)); |
| } |
| if (this.isSubTlvPresence()) { |
| this.setSubTlvLength(channelBuffer.readByte()); |
| while (channelBuffer.readableBytes() > 0) { |
| TlvHeader tlvHeader = new TlvHeader(); |
| tlvHeader.setTlvType(channelBuffer.readByte()); |
| tlvHeader.setTlvLength(channelBuffer.readByte()); |
| SubTlvType tlvValue = SubTlvType.get(tlvHeader.tlvType()); |
| if (tlvValue != null) { |
| TrafficEngineeringSubTlv subTlv = |
| SubTlvFinder.findSubTlv(tlvHeader, channelBuffer.readBytes(tlvHeader.tlvLength())); |
| if (subTlv != null) { |
| this.addSubTlv(subTlv); |
| } |
| } else { |
| channelBuffer.readBytes(tlvHeader.tlvLength()); |
| } |
| } |
| } |
| } |
| |
| |
| @Override |
| public byte[] asBytes() { |
| byte[] bytes = null; |
| byte[] tlvHeader = tlvHeaderAsByteArray(); |
| byte[] tlvBody = tlvBodyAsBytes(); |
| tlvHeader[1] = (byte) tlvBody.length; |
| bytes = Bytes.concat(tlvHeader, tlvBody); |
| |
| return bytes; |
| } |
| |
| /** |
| * Returns TLV body of IP external reachability TLV. |
| * |
| * @return byteArray TLV body of IP external reachability TLV. |
| */ |
| private byte[] tlvBodyAsBytes() { |
| List<Byte> bodyLst = new ArrayList<>(); |
| bodyLst.addAll(Bytes.asList(IsisUtil.convertToFourBytes(this.metric()))); |
| String controlInfo = ""; |
| if (this.isDown()) { |
| controlInfo = controlInfo + "1"; |
| } else { |
| controlInfo = controlInfo + "0"; |
| } |
| if (this.isSubTlvPresence()) { |
| controlInfo = controlInfo + "1"; |
| } else { |
| controlInfo = controlInfo + "0"; |
| } |
| String prefixLength = IsisUtil.toEightBitBinary(Integer.toBinaryString(this.prefixLength())); |
| controlInfo = controlInfo + prefixLength.substring(2, prefixLength.length()); |
| bodyLst.add(Byte.parseByte(controlInfo, 2)); |
| if (this.isSubTlvPresence()) { |
| bodyLst.add(this.subTlvLength()); |
| for (TrafficEngineeringSubTlv trafficEngineeringSubTlv : this.trafEnginSubTlv) { |
| bodyLst.addAll(SubTlvToBytes.tlvToBytes(trafficEngineeringSubTlv)); |
| } |
| } |
| bodyLst.addAll(Bytes.asList(IsisUtil.prefixToBytes(this.prefix()))); |
| |
| return Bytes.toArray(bodyLst); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .omitNullValues() |
| .add("down", down) |
| .add("subTlvPresence", subTlvPresence) |
| .add("prefixLength", prefixLength) |
| .add("metric", metric) |
| .add("subTlvLength", subTlvLength) |
| .add("prefix", prefix) |
| .add("trafEnginSubTlv", trafEnginSubTlv) |
| .toString(); |
| } |
| } |