ONOS-508: Implement IPv6, ICMP6 and NeighborAdvertisement class

Create ICMP6 class, which is mostly like ICMP

Change-Id: I11d7abec4a8f1fd202e5dfb0a500f621773c2c3a

Create IPv6 class, which is mostly like IPv4

Change-Id: I7a301a0f94263df5d6d30f73050332ec7acfe611

Register handler class of IPv6 to Ethernet

Change-Id: Iccdef1680664520f9d66360a289809710982ce54

Fix FIXED_HEADER_LENGTH

Change-Id: Iff4fb22638416595f2865ff46b682a0579ba33d5

Fix payloadLength

Change-Id: I8dea4dd52f0bb5926fbff0d9e74fdd19404cabff

Add unittest for serialize

Change-Id: If194aa2530ce517a33b36b97b8478b0a4c463954

Add unittest for deserialize. Fix assertArrayEquals. Refine test structure.

Change-Id: I94f2a348b2be2f5907d8bac6b9029b37eb31456d

Payload length should be handled during serializing/deserializing procedure

Change-Id: Ib079bf939a01a38356c824ed972793293ed8ca1e

Add unittest for comparator

Change-Id: I937dd9330d7c23a81ecd8434ac0fcf7345cc5c00

Fix typo. Fix checkstyle error

Change-Id: I2fe1af81c65416b0fddaa0fb9ae206b87b889628

Add implementation and unittest for NeighborAdvertisement

Change-Id: I7610462a5712f9fee5be0416c08e1de302e0780d

Register handler class of NeighborAdvertisement to ICMP6

Change-Id: I3a7a9cf044cfdcd8908579942c159c2f0aad198d

@@ -49,6 +49,7 @@ public class Ethernet extends BasePacket {
         Ethernet.ETHER_TYPE_CLASS_MAP.put(Ethernet.TYPE_ARP, ARP.class);
         Ethernet.ETHER_TYPE_CLASS_MAP.put(Ethernet.TYPE_RARP, ARP.class);
         Ethernet.ETHER_TYPE_CLASS_MAP.put(Ethernet.TYPE_IPV4, IPv4.class);
+        Ethernet.ETHER_TYPE_CLASS_MAP.put(Ethernet.TYPE_IPV6, IPv6.class);
         Ethernet.ETHER_TYPE_CLASS_MAP.put(Ethernet.TYPE_LLDP, LLDP.class);
         Ethernet.ETHER_TYPE_CLASS_MAP.put(Ethernet.TYPE_BSN, LLDP.class);
     }

+/*
+ * Copyright 2014 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.onlab.packet;
+
+import java.nio.ByteBuffer;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Implements ICMPv6 packet format.
+ *
+ */
+public class ICMP6 extends BasePacket {
+    public static final byte HEADER_LENGTH = 4; // bytes
+
+    public static final byte ROUTER_SOLICITATION = (byte) 0x85;
+    public static final byte ROUTER_ADVERTISEMENT = (byte) 0x86;
+    public static final byte NEIGHBOR_SOLICITATION = (byte) 0x87;
+    public static final byte NEIGHBOR_ADVERTISEMENT = (byte) 0x88;
+    public static final Map<Byte, Class<? extends IPacket>> PROTOCOL_CLASS_MAP =
+            new HashMap<>();
+
+    static {
+        ICMP6.PROTOCOL_CLASS_MAP.put(ICMP6.NEIGHBOR_ADVERTISEMENT, NeighborAdvertisement.class);
+    }
+
+    protected byte icmpType;
+    protected byte icmpCode;
+    protected short checksum;
+
+    /**
+     * @return the icmpType
+     */
+    public byte getIcmpType() {
+        return this.icmpType;
+    }
+
+    /**
+     * @param icmpType
+     *            to set
+     * @return this
+     */
+    public ICMP6 setIcmpType(final byte icmpType) {
+        this.icmpType = icmpType;
+        return this;
+    }
+
+    /**
+     * @return the icmp code
+     */
+    public byte getIcmpCode() {
+        return this.icmpCode;
+    }
+
+    /**
+     * @param icmpCode
+     *            code to set
+     * @return this
+     */
+    public ICMP6 setIcmpCode(final byte icmpCode) {
+        this.icmpCode = icmpCode;
+        return this;
+    }
+
+    /**
+     * @return the checksum
+     */
+    public short getChecksum() {
+        return this.checksum;
+    }
+
+    /**
+     * @param checksum
+     *            the checksum to set
+     * @return this
+     */
+    public ICMP6 setChecksum(final short checksum) {
+        this.checksum = checksum;
+        return this;
+    }
+
+    /**
+     * Serializes the packet. Will compute and set the following fields if they
+     * are set to specific values at the time serialize is called: -checksum : 0
+     * -length : 0
+     */
+    @Override
+    public byte[] serialize() {
+        byte[] payloadData = null;
+        if (this.payload != null) {
+            this.payload.setParent(this);
+            payloadData = this.payload.serialize();
+        }
+
+        int payloadLength = payloadData == null ? 0 : (short) payloadData.length;
+
+        final byte[] data = new byte[HEADER_LENGTH + payloadLength];
+        final ByteBuffer bb = ByteBuffer.wrap(data);
+
+        bb.put(this.icmpType);
+        bb.put(this.icmpCode);
+        bb.putShort(this.checksum);
+        if (payloadData != null) {
+            bb.put(payloadData);
+        }
+
+        if (this.parent != null && this.parent instanceof IPv6) {
+            ((IPv6) this.parent).setNextHeader(IPv6.PROTOCOL_ICMP6);
+        }
+
+        // compute checksum if needed
+        if (this.checksum == 0) {
+            bb.rewind();
+            int accumulation = 0;
+
+            for (int i = 0; i < data.length / 2; ++i) {
+                accumulation += 0xffff & bb.getShort();
+            }
+            // pad to an even number of shorts
+            if (data.length % 2 > 0) {
+                accumulation += (bb.get() & 0xff) << 8;
+            }
+
+            accumulation = (accumulation >> 16 & 0xffff)
+                    + (accumulation & 0xffff);
+            this.checksum = (short) (~accumulation & 0xffff);
+            bb.putShort(2, this.checksum);
+        }
+        return data;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#hashCode()
+     */
+    @Override
+    public int hashCode() {
+        final int prime = 5807;
+        int result = super.hashCode();
+        result = prime * result + this.icmpType;
+        result = prime * result + this.icmpCode;
+        result = prime * result + this.checksum;
+        return result;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!super.equals(obj)) {
+            return false;
+        }
+        if (!(obj instanceof ICMP6)) {
+            return false;
+        }
+        final ICMP6 other = (ICMP6) obj;
+        if (this.icmpType != other.icmpType) {
+            return false;
+        }
+        if (this.icmpCode != other.icmpCode) {
+            return false;
+        }
+        if (this.checksum != other.checksum) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public IPacket deserialize(final byte[] data, final int offset,
+                               final int length) {
+        final ByteBuffer bb = ByteBuffer.wrap(data, offset, length);
+        this.icmpType = bb.get();
+        this.icmpCode = bb.get();
+        this.checksum = bb.getShort();
+
+        IPacket payload;
+        if (ICMP6.PROTOCOL_CLASS_MAP.containsKey(this.icmpType)) {
+            final Class<? extends IPacket> clazz = ICMP6.PROTOCOL_CLASS_MAP
+                    .get(this.icmpType);
+            try {
+                payload = clazz.newInstance();
+            } catch (final Exception e) {
+                throw new RuntimeException(
+                        "Error parsing payload for ICMP6 packet", e);
+            }
+        } else {
+            payload = new Data();
+        }
+        this.payload = payload.deserialize(data, bb.position(),
+                bb.limit() - bb.position());
+        this.payload.setParent(this);
+
+        return this;
+    }
+}

+/*
+ * Copyright 2014 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.onlab.packet;
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ *
+ */
+public class IPv6 extends BasePacket {
+    public static final byte FIXED_HEADER_LENGTH = 40; // bytes
+
+    // TODO: Implement extension header.
+    public static final byte PROTOCOL_TCP = 0x6;
+    public static final byte PROTOCOL_UDP = 0x11;
+    public static final byte PROTOCOL_ICMP6 = 0x3A;
+    public static final Map<Byte, Class<? extends IPacket>> PROTOCOL_CLASS_MAP =
+            new HashMap<>();
+
+    static {
+        IPv6.PROTOCOL_CLASS_MAP.put(IPv6.PROTOCOL_ICMP6, ICMP6.class);
+        IPv6.PROTOCOL_CLASS_MAP.put(IPv6.PROTOCOL_TCP, TCP.class);
+        IPv6.PROTOCOL_CLASS_MAP.put(IPv6.PROTOCOL_UDP, UDP.class);
+    }
+
+    protected byte version;
+    protected byte diffServ;
+    protected int flowLabel;
+    protected short payloadLength;
+    protected byte nextHeader;
+    protected byte hopLimit;
+    protected byte[] sourceAddress = new byte[Ip6Address.BYTE_LENGTH];
+    protected byte[] destinationAddress = new byte[Ip6Address.BYTE_LENGTH];
+
+    /**
+     * Default constructor that sets the version to 4.
+     */
+    public IPv6() {
+        super();
+        this.version = 6;
+    }
+
+    /**
+     * @return the version
+     */
+    public byte getVersion() {
+        return this.version;
+    }
+
+    /**
+     * @param version
+     *            the version to set
+     * @return this
+     */
+    public IPv6 setVersion(final byte version) {
+        this.version = version;
+        return this;
+    }
+
+    /**
+     * @return the diffServ
+     */
+    public byte getDiffServ() {
+        return this.diffServ;
+    }
+
+    /**
+     * @param diffServ
+     *            the diffServ to set
+     * @return this
+     */
+    public IPv6 setDiffServ(final byte diffServ) {
+        this.diffServ = diffServ;
+        return this;
+    }
+
+    /**
+     * @return the flowLabel
+     */
+    public int getFlowLabel() {
+        return this.flowLabel;
+    }
+
+    /**
+     * @param flowLabel
+     *            the flowLabel to set
+     * @return this
+     */
+    public IPv6 setFlowLabel(final int flowLabel) {
+        this.flowLabel = flowLabel;
+        return this;
+    }
+
+    /**
+     * @return the nextHeader
+     */
+    public byte getNextHeader() {
+        return this.nextHeader;
+    }
+
+    /**
+     * @param nextHeader
+     *            the nextHeader to set
+     * @return this
+     */
+    public IPv6 setNextHeader(final byte nextHeader) {
+        this.nextHeader = nextHeader;
+        return this;
+    }
+
+    /**
+     * @return the hopLimit
+     */
+    public byte getHopLimit() {
+        return this.hopLimit;
+    }
+
+    /**
+     * @param hopLimit
+     *            the hopLimit to set
+     * @return this
+     */
+    public IPv6 setHopLimit(final byte hopLimit) {
+        this.hopLimit = hopLimit;
+        return this;
+    }
+
+    /**
+     * @return the sourceAddress
+     */
+    public byte[] getSourceAddress() {
+        return this.sourceAddress;
+    }
+
+    /**
+     * @param sourceAddress
+     *            the sourceAddress to set
+     * @return this
+     */
+    public IPv6 setSourceAddress(final byte[] sourceAddress) {
+        this.sourceAddress = Arrays.copyOfRange(sourceAddress, 0, Ip6Address.BYTE_LENGTH);
+        return this;
+    }
+
+    /**
+     * @return the destinationAddress
+     */
+    public byte[] getDestinationAddress() {
+        return this.destinationAddress;
+    }
+
+    /**
+     * @param destinationAddress
+     *            the destinationAddress to set
+     * @return this
+     */
+    public IPv6 setDestinationAddress(final byte[] destinationAddress) {
+        this.destinationAddress = Arrays.copyOfRange(destinationAddress, 0, Ip6Address.BYTE_LENGTH);
+        return this;
+    }
+
+    @Override
+    public byte[] serialize() {
+        byte[] payloadData = null;
+        if (this.payload != null) {
+            this.payload.setParent(this);
+            payloadData = this.payload.serialize();
+        }
+
+        this.payloadLength = payloadData == null ? 0 : (short) payloadData.length;
+
+        final byte[] data = new byte[FIXED_HEADER_LENGTH + payloadLength];
+        final ByteBuffer bb = ByteBuffer.wrap(data);
+
+        bb.putInt((this.version & 0xf) << 28 | (this.diffServ & 0xff) << 20 | this.flowLabel & 0xfffff);
+        bb.putShort(this.payloadLength);
+        bb.put(this.nextHeader);
+        bb.put(this.hopLimit);
+        bb.put(this.sourceAddress, 0, Ip6Address.BYTE_LENGTH);
+        bb.put(this.destinationAddress, 0, Ip6Address.BYTE_LENGTH);
+
+        if (payloadData != null) {
+            bb.put(payloadData);
+        }
+
+        return data;
+    }
+
+    @Override
+    public IPacket deserialize(final byte[] data, final int offset,
+                               final int length) {
+        final ByteBuffer bb = ByteBuffer.wrap(data, offset, length);
+        int iscratch;
+
+        iscratch = bb.getInt();
+        this.version = (byte) (iscratch >> 28 & 0xf);
+        this.diffServ = (byte) (iscratch >> 20 & 0xff);
+        this.flowLabel = iscratch & 0xfffff;
+        this.payloadLength = bb.getShort();
+        this.nextHeader = bb.get();
+        this.hopLimit = bb.get();
+        bb.get(this.sourceAddress, 0, Ip6Address.BYTE_LENGTH);
+        bb.get(this.destinationAddress, 0, Ip6Address.BYTE_LENGTH);
+
+        IPacket payload;
+        if (IPv6.PROTOCOL_CLASS_MAP.containsKey(this.nextHeader)) {
+            final Class<? extends IPacket> clazz = IPv6.PROTOCOL_CLASS_MAP
+                    .get(this.nextHeader);
+            try {
+                payload = clazz.newInstance();
+            } catch (final Exception e) {
+                throw new RuntimeException(
+                        "Error parsing payload for IPv6 packet", e);
+            }
+        } else {
+            payload = new Data();
+        }
+        this.payload = payload.deserialize(data, bb.position(),
+                bb.limit() - bb.position());
+        this.payload.setParent(this);
+
+        return this;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#hashCode()
+     */
+    @Override
+    public int hashCode() {
+        final int prime = 2521;
+        int result = super.hashCode();
+        ByteBuffer bb;
+        bb = ByteBuffer.wrap(this.destinationAddress);
+        for (int i = 0; i < 4; i++) {
+            result = prime * result + bb.getInt();
+        }
+        result = prime * result + this.diffServ;
+        result = prime * result + this.flowLabel;
+        result = prime * result + this.hopLimit;
+        result = prime * result + this.nextHeader;
+        result = prime * result + this.payloadLength;
+        bb = ByteBuffer.wrap(this.sourceAddress);
+        for (int i = 0; i < 4; i++) {
+            result = prime * result + bb.getInt();
+        }
+        result = prime * result + this.version;
+        return result;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!super.equals(obj)) {
+            return false;
+        }
+        if (!(obj instanceof IPv6)) {
+            return false;
+        }
+        final IPv6 other = (IPv6) obj;
+        if (!Arrays.equals(this.destinationAddress, other.destinationAddress)) {
+            return false;
+        }
+        if (this.diffServ != other.diffServ) {
+            return false;
+        }
+        if (this.flowLabel != other.flowLabel) {
+            return false;
+        }
+        if (this.hopLimit != other.hopLimit) {
+            return false;
+        }
+        if (this.nextHeader != other.nextHeader) {
+            return false;
+        }
+        if (this.payloadLength != other.payloadLength) {
+            return false;
+        }
+        if (!Arrays.equals(this.sourceAddress, other.sourceAddress)) {
+            return false;
+        }
+        return true;
+    }
+}

+/*
+ * Copyright 2014 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.onlab.packet;
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+/**
+ * Implements ICMPv6 Neighbor Solicitation packet format.
+ */
+public class NeighborAdvertisement extends BasePacket {
+    public static final byte HEADER_LENGTH = 20; // bytes
+
+    protected byte routerFlag;
+    protected byte solicitedFlag;
+    protected byte overrideFlag;
+    protected byte[] targetAddress = new byte[Ip6Address.BYTE_LENGTH];
+
+    /**
+     *
+     * @return true if router flag is set
+     */
+    public byte getRouterFlag() {
+        return this.routerFlag;
+    }
+
+    /**
+     * @param routerFlag
+     *            the routerFlag to set
+     * @return this
+     */
+    public NeighborAdvertisement setRouterFlag(final byte routerFlag) {
+        this.routerFlag = routerFlag;
+        return this;
+    }
+
+    /**
+     *
+     * @return true if solicited flag is set
+     */
+    public byte getSolicitedFlag() {
+        return this.solicitedFlag;
+    }
+
+    /**
+     * @param solicitedFlag
+     *            the routerFlag to set
+     * @return this
+     */
+    public NeighborAdvertisement setSolicitedFlag(final byte solicitedFlag) {
+        this.solicitedFlag = solicitedFlag;
+        return this;
+    }
+
+    /**
+     *
+     * @return true if override flag is set
+     */
+    public byte getOverrideFlag() {
+        return this.overrideFlag;
+    }
+
+    /**
+     * @param overrideFlag
+     *            the routerFlag to set
+     * @return this
+     */
+    public NeighborAdvertisement setOverrideFlag(final byte overrideFlag) {
+        this.overrideFlag = overrideFlag;
+        return this;
+    }
+
+    /**
+     *
+     * @return the target IPv6 address
+     */
+    public byte[] getTargetAddress() {
+        return this.targetAddress;
+    }
+
+    /**
+     * @param targetAddress
+     *            the sourceAddress to set
+     * @return this
+     */
+    public NeighborAdvertisement setTargetAddress(final byte[] targetAddress) {
+        this.targetAddress = Arrays.copyOfRange(targetAddress, 0, Ip6Address.BYTE_LENGTH);
+        return this;
+    }
+
+    /**
+     * Serializes the packet. Will compute and set the following fields if they
+     * are set to specific values at the time serialize is called: -routerFlag : 0
+     * -solicitedFlag : 0 -overrideFlag : 0
+     */
+    @Override
+    public byte[] serialize() {
+        byte[] payloadData = null;
+        if (this.payload != null) {
+            this.payload.setParent(this);
+            payloadData = this.payload.serialize();
+        }
+
+        int payloadLength = payloadData == null ? 0 : (short) payloadData.length;
+
+        final byte[] data = new byte[HEADER_LENGTH + payloadLength];
+        final ByteBuffer bb = ByteBuffer.wrap(data);
+
+        bb.putInt((this.routerFlag & 0x1) << 31 | (this.solicitedFlag & 0x1) << 30 | (this.overrideFlag & 0x1) << 29);
+        bb.put(this.targetAddress, 0, Ip6Address.BYTE_LENGTH);
+        if (payloadData != null) {
+            bb.put(payloadData);
+        }
+
+        return data;
+    }
+
+    @Override
+    public IPacket deserialize(byte[] data, int offset, int length) {
+        final ByteBuffer bb = ByteBuffer.wrap(data, offset, length);
+        int iscratch;
+
+        iscratch = bb.getInt();
+        this.routerFlag = (byte) (iscratch >> 31 & 0x1);
+        this.solicitedFlag = (byte) (iscratch >> 30 & 0x1);
+        this.overrideFlag = (byte) (iscratch >> 29 & 0x1);
+        bb.get(this.targetAddress, 0, Ip6Address.BYTE_LENGTH);
+
+        this.payload = new Data();
+        this.payload = this.payload.deserialize(data, bb.position(), bb.limit()
+                - bb.position());
+        this.payload.setParent(this);
+
+        return this;
+    }
+
+    /*
+ * (non-Javadoc)
+ *
+ * @see java.lang.Object#hashCode()
+ */
+    @Override
+    public int hashCode() {
+        final int prime = 5807;
+        int result = super.hashCode();
+        ByteBuffer bb;
+        result = prime * result + this.routerFlag;
+        result = prime * result + this.solicitedFlag;
+        result = prime * result + this.overrideFlag;
+        bb = ByteBuffer.wrap(this.targetAddress);
+        for (int i = 0; i < 4; i++) {
+            result = prime * result + bb.getInt();
+        }
+        return result;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!super.equals(obj)) {
+            return false;
+        }
+        if (!(obj instanceof NeighborAdvertisement)) {
+            return false;
+        }
+        final NeighborAdvertisement other = (NeighborAdvertisement) obj;
+        if (this.routerFlag != other.routerFlag) {
+            return false;
+        }
+        if (this.solicitedFlag != other.solicitedFlag) {
+            return false;
+        }
+        if (this.overrideFlag != other.overrideFlag) {
+            return false;
+        }
+        if (!Arrays.equals(this.targetAddress, other.targetAddress)) {
+            return false;
+        }
+        return true;
+    }
+}

+/*
+ * Copyright 2014 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.onlab.packet;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertFalse;
+
+/**
+ * Tests for class {@link IPv6}.
+ */
+public class IPv6Test {
+    private static final byte[] SOURCE_ADDRESS = {
+            (byte) 0x20, (byte) 0x01, (byte) 0x0f, (byte) 0x18, (byte) 0x01, (byte) 0x13, (byte) 0x02, (byte) 0x15,
+            (byte) 0xca, (byte) 0x2a, (byte) 0x14, (byte) 0xff, (byte) 0xfe, (byte) 0x35, (byte) 0x26, (byte) 0xce
+    };
+    private static final byte[] DESTINATION_ADDRESS = {
+            (byte) 0x20, (byte) 0x01, (byte) 0x0f, (byte) 0x18, (byte) 0x01, (byte) 0x13, (byte) 0x02, (byte) 0x15,
+            (byte) 0xe6, (byte) 0xce, (byte) 0x8f, (byte) 0xff, (byte) 0xfe, (byte) 0x54, (byte) 0x37, (byte) 0xc8
+    };
+    private static Data data;
+    private static UDP udp;
+    private static byte[] bytePacket;
+
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        data = new Data();
+        data.setData("testSerialize".getBytes());
+        udp = new UDP();
+        udp.setPayload(data);
+
+        byte[] bytePayload = udp.serialize();
+        byte[] byteHeader = {
+                (byte) 0x69, (byte) 0x31, (byte) 0x35, (byte) 0x79,
+                (byte) (bytePayload.length >> 8 & 0xff), (byte) (bytePayload.length & 0xff),
+                (byte) 0x11, (byte) 0x20,
+                (byte) 0x20, (byte) 0x01, (byte) 0x0f, (byte) 0x18, (byte) 0x01, (byte) 0x13, (byte) 0x02, (byte) 0x15,
+                (byte) 0xca, (byte) 0x2a, (byte) 0x14, (byte) 0xff, (byte) 0xfe, (byte) 0x35, (byte) 0x26, (byte) 0xce,
+                (byte) 0x20, (byte) 0x01, (byte) 0x0f, (byte) 0x18, (byte) 0x01, (byte) 0x13, (byte) 0x02, (byte) 0x15,
+                (byte) 0xe6, (byte) 0xce, (byte) 0x8f, (byte) 0xff, (byte) 0xfe, (byte) 0x54, (byte) 0x37, (byte) 0xc8,
+        };
+        bytePacket = new byte[byteHeader.length + bytePayload.length];
+        System.arraycopy(byteHeader, 0, bytePacket, 0, byteHeader.length);
+        System.arraycopy(bytePayload, 0, bytePacket, byteHeader.length, bytePayload.length);
+    }
+
+    /**
+     * Tests serialize and setters.
+     */
+    @Test
+    public void testSerialize() {
+        IPv6 ipv6 = new IPv6();
+        ipv6.setPayload(udp);
+        ipv6.setVersion((byte) 6);
+        ipv6.setDiffServ((byte) 0x93);
+        ipv6.setFlowLabel(0x13579);
+        ipv6.setNextHeader(IPv6.PROTOCOL_UDP);
+        ipv6.setHopLimit((byte) 32);
+        ipv6.setSourceAddress(SOURCE_ADDRESS);
+        ipv6.setDestinationAddress(DESTINATION_ADDRESS);
+
+        assertArrayEquals(ipv6.serialize(), bytePacket);
+    }
+
+    /**
+     * Tests deserialize and getters.
+     */
+    @Test
+    public void testDeserialize() {
+        IPv6 ipv6 = new IPv6();
+        ipv6.deserialize(bytePacket, 0, bytePacket.length);
+
+        assertThat(ipv6.getVersion(), is((byte) 6));
+        assertThat(ipv6.getDiffServ(), is((byte) 0x93));
+        assertThat(ipv6.getFlowLabel(), is(0x13579));
+        assertThat(ipv6.getNextHeader(), is(IPv6.PROTOCOL_UDP));
+        assertThat(ipv6.getHopLimit(), is((byte) 32));
+        assertArrayEquals(ipv6.getSourceAddress(), SOURCE_ADDRESS);
+        assertArrayEquals(ipv6.getDestinationAddress(), DESTINATION_ADDRESS);
+    }
+
+    /**
+     * Tests comparator.
+     */
+    @Test
+    public void testEqual() {
+        IPv6 packet1 = new IPv6();
+        packet1.setPayload(udp);
+        packet1.setVersion((byte) 6);
+        packet1.setDiffServ((byte) 0x93);
+        packet1.setFlowLabel(0x13579);
+        packet1.setNextHeader(IPv6.PROTOCOL_UDP);
+        packet1.setHopLimit((byte) 32);
+        packet1.setSourceAddress(SOURCE_ADDRESS);
+        packet1.setDestinationAddress(DESTINATION_ADDRESS);
+
+        IPv6 packet2 = new IPv6();
+        packet2.setPayload(udp);
+        packet2.setVersion((byte) 6);
+        packet2.setDiffServ((byte) 0x93);
+        packet2.setFlowLabel(0x13579);
+        packet2.setNextHeader(IPv6.PROTOCOL_UDP);
+        packet2.setHopLimit((byte) 32);
+        packet2.setSourceAddress(DESTINATION_ADDRESS);
+        packet2.setDestinationAddress(SOURCE_ADDRESS);
+
+        assertTrue(packet1.equals(packet1));
+        assertFalse(packet1.equals(packet2));
+    }
+}

+/*
+ * Copyright 2014 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.onlab.packet;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.*;
+
+/**
+ * Tests for class {@link NeighborAdvertisement}.
+ */
+public class NeighborAdvertisementTest {
+    private static final byte[] TARGET_ADDRESS = {
+            (byte) 0x20, (byte) 0x01, (byte) 0x0f, (byte) 0x18, (byte) 0x01, (byte) 0x13, (byte) 0x02, (byte) 0x15,
+            (byte) 0xca, (byte) 0x2a, (byte) 0x14, (byte) 0xff, (byte) 0xfe, (byte) 0x35, (byte) 0x26, (byte) 0xce
+    };
+    private static Data data;
+    private static byte[] bytePacket;
+
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        data = new Data();
+        data.setData("".getBytes());
+
+        byte[] bytePayload = data.serialize();
+        byte[] byteHeader = {
+                (byte) 0xe0, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+                (byte) 0x20, (byte) 0x01, (byte) 0x0f, (byte) 0x18, (byte) 0x01, (byte) 0x13, (byte) 0x02, (byte) 0x15,
+                (byte) 0xca, (byte) 0x2a, (byte) 0x14, (byte) 0xff, (byte) 0xfe, (byte) 0x35, (byte) 0x26, (byte) 0xce
+        };
+        bytePacket = new byte[byteHeader.length + bytePayload.length];
+        System.arraycopy(byteHeader, 0, bytePacket, 0, byteHeader.length);
+        System.arraycopy(bytePayload, 0, bytePacket, byteHeader.length, bytePayload.length);
+    }
+
+    /**
+     * Tests serialize and setters.
+     */
+    @Test
+    public void testSerialize() {
+        NeighborAdvertisement na = new NeighborAdvertisement();
+        na.setRouterFlag((byte) 1);
+        na.setSolicitedFlag((byte) 1);
+        na.setOverrideFlag((byte) 1);
+        na.setTargetAddress(TARGET_ADDRESS);
+
+        assertArrayEquals(na.serialize(), bytePacket);
+    }
+
+    /**
+     * Tests deserialize and getters.
+     */
+    @Test
+    public void testDeserialize() {
+        NeighborAdvertisement na = new NeighborAdvertisement();
+        na.deserialize(bytePacket, 0, bytePacket.length);
+
+        assertThat(na.getRouterFlag(), is((byte) 1));
+        assertThat(na.getSolicitedFlag(), is((byte) 1));
+        assertThat(na.getOverrideFlag(), is((byte) 1));
+        assertArrayEquals(na.getTargetAddress(), TARGET_ADDRESS);
+    }
+
+    /**
+     * Tests comparator.
+     */
+    @Test
+    public void testEqual() {
+        NeighborAdvertisement na1 = new NeighborAdvertisement();
+        na1.setRouterFlag((byte) 1);
+        na1.setSolicitedFlag((byte) 1);
+        na1.setOverrideFlag((byte) 1);
+        na1.setTargetAddress(TARGET_ADDRESS);
+
+        NeighborAdvertisement na2 = new NeighborAdvertisement();
+        na2.setRouterFlag((byte) 1);
+        na2.setSolicitedFlag((byte) 1);
+        na2.setOverrideFlag((byte) 0);
+        na2.setTargetAddress(TARGET_ADDRESS);
+
+        assertTrue(na1.equals(na1));
+        assertFalse(na1.equals(na2));
+    }
+}