| /* |
| * Copyright 2016-present Open Networking Foundation |
| * |
| * 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.Objects; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.pcepio.protocol.PcepVersion; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Provides SR PCE Capability Tlv. |
| */ |
| public class SrPceCapabilityTlv implements PcepValueType { |
| |
| /* |
| * |
| reference : draft-ietf-pce-segment-routing-06, section 5.1.1 |
| |
| 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=TBD | Length=4 | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| | Reserved | Flags | MSD | |
| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| fig: SR-PCE-CAPABILITY TLV format |
| */ |
| private static final Logger log = LoggerFactory.getLogger(SrPceCapabilityTlv.class); |
| |
| public static final short TYPE = 26; |
| public static final short LENGTH = 4; |
| |
| private final byte msd; |
| |
| /** |
| * Constructor to initialize its parameter. |
| * |
| * @param msd maximum SID depth |
| */ |
| public SrPceCapabilityTlv(byte msd) { |
| this.msd = msd; |
| } |
| |
| /** |
| * Obtains newly created SrPceCapabilityTlv object. |
| * |
| * @param msd maximum SID depth |
| * @return object of SrPceCapabilityTlv |
| */ |
| public static SrPceCapabilityTlv of(final byte msd) { |
| return new SrPceCapabilityTlv(msd); |
| } |
| |
| /** |
| * Obtains msd. |
| * |
| * @return msd |
| */ |
| public byte msd() { |
| return msd; |
| } |
| |
| @Override |
| public PcepVersion getVersion() { |
| return PcepVersion.PCEP_1; |
| } |
| |
| @Override |
| public short getType() { |
| return TYPE; |
| } |
| |
| @Override |
| public short getLength() { |
| return LENGTH; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(msd); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof SrPceCapabilityTlv) { |
| SrPceCapabilityTlv other = (SrPceCapabilityTlv) obj; |
| return Objects.equals(msd, other.msd); |
| } |
| return false; |
| } |
| |
| @Override |
| public int write(ChannelBuffer c) { |
| int iLenStartIndex = c.writerIndex(); |
| c.writeShort(TYPE); |
| c.writeShort(LENGTH); |
| c.writeInt(msd); |
| return c.writerIndex() - iLenStartIndex; |
| } |
| |
| /** |
| * Reads the channel buffer and returns object of SrPceCapabilityTlv. |
| * |
| * @param cb channel buffer |
| * @return object of Gmpls-Capability-Tlv |
| */ |
| public static SrPceCapabilityTlv read(ChannelBuffer cb) { |
| //read reserved bits |
| cb.readShort(); |
| //read flags |
| cb.readByte(); |
| return SrPceCapabilityTlv.of(cb.readByte()); |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("Type", TYPE) |
| .add("Length", LENGTH) |
| .add("msd", msd) |
| .toString(); |
| } |
| } |