| /* |
| * Copyright 2017-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.onlab.packet; |
| |
| import org.slf4j.Logger; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| import java.util.Objects; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Default DHCP option. |
| */ |
| public class RIPngEntry extends BasePacket { |
| public static final int OPT_CODE_LEN = 1; |
| public static final int ENTRY_LEN = 20; |
| public static final byte INFINITY_METRIC = 16; |
| public static final int NEXTHOP_METRIC = 255; // actually it is 0xFF |
| |
| private final Logger log = getLogger(getClass()); |
| protected byte[] prefix; // 16 bytes |
| protected short routeTag; |
| protected int prefixLen; |
| protected int metric; |
| |
| @Override |
| public byte[] serialize() { |
| ByteBuffer byteBuffer; |
| byteBuffer = ByteBuffer.allocate(ENTRY_LEN); |
| byteBuffer.put(prefix); |
| byteBuffer.putShort(routeTag); |
| byteBuffer.put((byte) prefixLen); |
| byteBuffer.put((byte) metric); |
| return byteBuffer.array(); |
| } |
| |
| /** |
| * Deserializer function for RIPng entry. |
| * |
| * @return deserializer function |
| */ |
| public static Deserializer<RIPngEntry> deserializer() { |
| return (data, offset, length) -> { |
| RIPngEntry ripngEntry = new RIPngEntry(); |
| |
| checkNotNull(data); |
| |
| if (offset < 0 || length < 0 || |
| length > data.length || offset >= data.length || |
| offset + length > data.length) { |
| throw new DeserializationException("Illegal offset or length"); |
| } |
| ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| if (bb.remaining() < ENTRY_LEN) { |
| throw new DeserializationException( |
| "Buffer underflow while reading RIPng entry"); |
| } |
| ripngEntry.prefix = new byte[IpAddress.INET6_BYTE_LENGTH]; |
| bb.get(ripngEntry.prefix); |
| ripngEntry.routeTag = bb.getShort(); |
| ripngEntry.prefixLen = 0xFF & bb.get(); |
| ripngEntry.metric = 0xFF & bb.get(); |
| return ripngEntry; |
| }; |
| } |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#hashCode() |
| */ |
| @Override |
| public int hashCode() { |
| return Objects.hash(super.hashCode(), metric, prefixLen, Arrays.hashCode(prefix), routeTag); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#equals(java.lang.Object) |
| */ |
| @Override |
| public boolean equals(final Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (!(obj instanceof RIPngEntry)) { |
| return false; |
| } |
| final RIPngEntry that = (RIPngEntry) obj; |
| |
| return super.equals(that) && |
| Objects.equals(metric, that.metric) && |
| Objects.equals(prefixLen, that.prefixLen) && |
| Arrays.equals(prefix, that.prefix) && |
| Objects.equals(routeTag, that.routeTag); |
| } |
| /** |
| * @return the IPv6 prefix |
| */ |
| public byte[] getPrefix() { |
| return this.prefix; |
| } |
| |
| /** |
| * @param prefix the IPv6 prefix to set |
| * @return this |
| */ |
| public RIPngEntry setPrefix(final byte[] prefix) { |
| this.prefix = prefix; |
| return this; |
| } |
| |
| /** |
| * @return the route tag |
| */ |
| public short getRouteTag() { |
| return this.routeTag; |
| } |
| |
| /** |
| * @param routetag the route tag to set |
| * @return this |
| */ |
| public RIPngEntry setRouteTag(final short routetag) { |
| this.routeTag = routetag; |
| return this; |
| } |
| |
| /** |
| * @return the prefix length |
| */ |
| public int getPrefixLen() { |
| return this.prefixLen; |
| } |
| |
| /** |
| * @param prefixlen the prefix length to set |
| * @return this |
| */ |
| public RIPngEntry setPrefixLen(final int prefixlen) { |
| this.prefixLen = prefixlen; |
| return this; |
| } |
| |
| /** |
| * @return the metric |
| */ |
| public int getMetric() { |
| return this.metric; |
| } |
| |
| /** |
| * @param metric the route metric to set |
| * @return this |
| */ |
| public RIPngEntry setMetric(final int metric) { |
| this.metric = metric; |
| return this; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see java.lang.Object#toString() |
| */ |
| @Override |
| public String toString() { |
| return "RIPngEntry [prefix=" + Arrays.toString(this.prefix) + ", route tag=" + this.routeTag |
| + ", prefix length=" + this.prefixLen |
| + ", metric = " + this.metric + "]"; |
| } |
| } |