Refactor org.onlab.packet.{TCP,UDP,ICMP6}

- ONOS-1012: Fix TCP checksum when using IPv6
- ONOS-1013: Fix UDP checksum when using IPv6
- ONOS-1593: Remove get/setTcpChecksum
- Remove unnecessary parameter of getUrgentPointer() in TCP
- Complete javadoc for TCP
- Add unit test for {TCP,UDP,ICMP6}

Change-Id: Iad5eeb35812ede6764a9a9a4a57b9837e5ea5dd6

 /*
- * Copyright 2014 Open Networking Laboratory
+ * Copyright 2014-2015 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.
@@ -34,6 +34,8 @@ import java.util.Map;
 public class ICMP6 extends BasePacket {
     public static final byte HEADER_LENGTH = 4; // bytes
 
+    public static final byte ECHO_REQUEST = (byte) 0x80;
+    public static final byte ECHO_REPLY = (byte) 0x81;
     public static final byte ROUTER_SOLICITATION = (byte) 0x85;
     public static final byte ROUTER_ADVERTISEMENT = (byte) 0x86;
     public static final byte NEIGHBOR_SOLICITATION = (byte) 0x87;
@@ -149,8 +151,8 @@ public class ICMP6 extends BasePacket {
             }
         }
         if (ipv6Parent != null) {
-            bbChecksum.put(((IPv6) ipv6Parent).getSourceAddress());
-            bbChecksum.put(((IPv6) ipv6Parent).getDestinationAddress());
+            bbChecksum.put(ipv6Parent.getSourceAddress());
+            bbChecksum.put(ipv6Parent.getDestinationAddress());
         } else {
             // NOTE: IPv6 source and destination addresses unknown. Use zeroes.
             bbChecksum.put(ZERO_ADDRESS);

 /*
- * Copyright 2014 Open Networking Laboratory
+ * Copyright 2014-2015 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.
@@ -21,7 +21,7 @@ package org.onlab.packet;
 import java.nio.ByteBuffer;
 
 /**
- *
+ * Implements TCP packet format.
  */
 
 public class TCP extends BasePacket {
@@ -37,15 +37,18 @@ public class TCP extends BasePacket {
     protected byte[] options;
 
     /**
-     * @return the sourcePort
+     * Gets TCP source port.
+     *
+     * @return TCP source port
      */
     public short getSourcePort() {
         return this.sourcePort;
     }
 
     /**
-     * @param sourcePort
-     *            the sourcePort to set
+     * Sets TCP source port.
+     *
+     * @param sourcePort the sourcePort to set
      * @return this
      */
     public TCP setSourcePort(final short sourcePort) {
@@ -54,6 +57,8 @@ public class TCP extends BasePacket {
     }
 
     /**
+     * Gets TCP destination port.
+     *
      * @return the destinationPort
      */
     public short getDestinationPort() {
@@ -61,8 +66,9 @@ public class TCP extends BasePacket {
     }
 
     /**
-     * @param destinationPort
-     *            the destinationPort to set
+     * Sets TCP destination port.
+     *
+     * @param destinationPort the destinationPort to set
      * @return this
      */
     public TCP setDestinationPort(final short destinationPort) {
@@ -71,98 +77,169 @@ public class TCP extends BasePacket {
     }
 
     /**
+     * Gets checksum.
+     *
      * @return the checksum
      */
     public short getChecksum() {
         return this.checksum;
     }
 
+    /**
+     * Sets checksum.
+     *
+     * @param checksum the checksum to set
+     * @return this
+     */
+    public TCP setChecksum(final short checksum) {
+        this.checksum = checksum;
+        return this;
+    }
+
+    /**
+     * Gets sequence number.
+     *
+     * @return the sequence number
+     */
     public int getSequence() {
         return this.sequence;
     }
 
+    /**
+     * Sets sequence number.
+     *
+     * @param seq the sequence number to set
+     * @return this
+     */
     public TCP setSequence(final int seq) {
         this.sequence = seq;
         return this;
     }
 
+    /**
+     * Gets acknowledge number.
+     *
+     * @return the acknowledge number
+     */
     public int getAcknowledge() {
         return this.acknowledge;
     }
 
+    /**
+     * Sets acknowledge number.
+     *
+     * @param ack the acknowledge number to set
+     * @return this
+     */
     public TCP setAcknowledge(final int ack) {
         this.acknowledge = ack;
         return this;
     }
 
+    /**
+     * Gets offset.
+     *
+     * @return the offset
+     */
     public byte getDataOffset() {
         return this.dataOffset;
     }
 
+    /**
+     * Sets offset.
+     *
+     * @param offset the offset to set
+     * @return this
+     */
     public TCP setDataOffset(final byte offset) {
         this.dataOffset = offset;
         return this;
     }
 
+    /**
+     * Gets TCP flags.
+     *
+     * @return the TCP flags
+     */
     public short getFlags() {
         return this.flags;
     }
 
+    /**
+     * Sets TCP flags.
+     *
+     * @param flags the TCP flags to set
+     * @return this
+     */
     public TCP setFlags(final short flags) {
         this.flags = flags;
         return this;
     }
 
+    /**
+     * Gets TCP window size.
+     *
+     * @return the TCP window size
+     */
     public short getWindowSize() {
         return this.windowSize;
     }
 
+    /**
+     * Sets TCP window size.
+     *
+     * @param windowSize the TCP window size to set
+     * @return this
+     */
     public TCP setWindowSize(final short windowSize) {
         this.windowSize = windowSize;
         return this;
     }
 
-    public short getTcpChecksum() {
-        return this.checksum;
-    }
-
-    public TCP setTcpChecksum(final short checksum) {
-        this.checksum = checksum;
-        return this;
-    }
-
     @Override
     public void resetChecksum() {
         this.checksum = 0;
         super.resetChecksum();
     }
 
-    public short getUrgentPointer(final short urgentPointer) {
+    /**
+     * Gets urgent pointer.
+     *
+     * @return the urgent pointer
+     */
+    public short getUrgentPointer() {
         return this.urgentPointer;
     }
 
+    /**
+     * Sets urgent pointer.
+     *
+     * @param urgentPointer the urgent pointer to set
+     * @return this
+     */
     public TCP setUrgentPointer(final short urgentPointer) {
         this.urgentPointer = urgentPointer;
         return this;
     }
 
+    /**
+     * Gets TCP options.
+     *
+     * @return the TCP options
+     */
     public byte[] getOptions() {
         return this.options;
     }
 
-    public TCP setOptions(final byte[] options) {
-        this.options = options;
-        this.dataOffset = (byte) (20 + options.length + 3 >> 2);
-        return this;
-    }
-
     /**
-     * @param checksum
-     *            the checksum to set
+     * Sets TCP options.
+     *
+     * @param options the options to set
      * @return this
      */
-    public TCP setChecksum(final short checksum) {
-        this.checksum = checksum;
+    public TCP setOptions(final byte[] options) {
+        this.options = options;
+        this.dataOffset = (byte) (20 + options.length + 3 >> 2);
         return this;
     }
 
@@ -218,7 +295,8 @@ public class TCP extends BasePacket {
             int accumulation = 0;
 
             // compute pseudo header mac
-            if (this.parent != null && this.parent instanceof IPv4) {
+            if (this.parent != null) {
+                if (this.parent instanceof IPv4) {
                     final IPv4 ipv4 = (IPv4) this.parent;
                     accumulation += (ipv4.getSourceAddress() >> 16 & 0xffff)
                             + (ipv4.getSourceAddress() & 0xffff);
@@ -226,6 +304,23 @@ public class TCP extends BasePacket {
                             + (ipv4.getDestinationAddress() & 0xffff);
                     accumulation += ipv4.getProtocol() & 0xff;
                     accumulation += length & 0xffff;
+                } else if (this.parent instanceof IPv6) {
+                    final IPv6 ipv6 = (IPv6) this.parent;
+                    final int bbLength =
+                            Ip6Address.BYTE_LENGTH * 2 // IPv6 src, dst
+                                    + 2  // nextHeader (with padding)
+                                    + 4; // length
+                    final ByteBuffer bbChecksum = ByteBuffer.allocate(bbLength);
+                    bbChecksum.put(ipv6.getSourceAddress());
+                    bbChecksum.put(ipv6.getDestinationAddress());
+                    bbChecksum.put((byte) 0); // padding
+                    bbChecksum.put(ipv6.getNextHeader());
+                    bbChecksum.putInt(length);
+                    bbChecksum.rewind();
+                    for (int i = 0; i < bbLength / 2; ++i) {
+                        accumulation += 0xffff & bbChecksum.getShort();
+                    }
+                }
             }
 
             for (int i = 0; i < length / 2; ++i) {

 /*
- * Copyright 2014 Open Networking Laboratory
+ * Copyright 2014-2015 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.
@@ -148,14 +148,32 @@ public class UDP extends BasePacket {
             int accumulation = 0;
 
             // compute pseudo header mac
-            if (this.parent != null && this.parent instanceof IPv4) {
+            if (this.parent != null) {
+                if (this.parent instanceof IPv4) {
                     final IPv4 ipv4 = (IPv4) this.parent;
                     accumulation += (ipv4.getSourceAddress() >> 16 & 0xffff)
                             + (ipv4.getSourceAddress() & 0xffff);
                     accumulation += (ipv4.getDestinationAddress() >> 16 & 0xffff)
                             + (ipv4.getDestinationAddress() & 0xffff);
                     accumulation += ipv4.getProtocol() & 0xff;
-                accumulation += this.length & 0xffff;
+                    accumulation += length & 0xffff;
+                } else if (this.parent instanceof IPv6) {
+                    final IPv6 ipv6 = (IPv6) this.parent;
+                    final int bbLength =
+                            Ip6Address.BYTE_LENGTH * 2 // IPv6 src, dst
+                                    + 2  // nextHeader (with padding)
+                                    + 4; // length
+                    final ByteBuffer bbChecksum = ByteBuffer.allocate(bbLength);
+                    bbChecksum.put(ipv6.getSourceAddress());
+                    bbChecksum.put(ipv6.getDestinationAddress());
+                    bbChecksum.put((byte) 0); // padding
+                    bbChecksum.put(ipv6.getNextHeader());
+                    bbChecksum.putInt(length);
+                    bbChecksum.rewind();
+                    for (int i = 0; i < bbLength / 2; ++i) {
+                        accumulation += 0xffff & bbChecksum.getShort();
+                    }
+                }
             }
 
             for (int i = 0; i < this.length / 2; ++i) {

+/*
+ * Copyright 2014-2015 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.assertArrayEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for class {@link ICMP6}.
+ */
+public class ICMP6Test {
+    private static final byte[] IPV6_SOURCE_ADDRESS = {
+            (byte) 0xfe, (byte) 0x80, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x01
+    };
+    private static final byte[] IPV6_DESTINATION_ADDRESS = {
+            (byte) 0xfe, (byte) 0x80, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x02
+    };
+
+    private static IPv6 ipv6 = new IPv6();
+    private static byte[] bytePacket = {
+            ICMP6.ECHO_REQUEST,       // type
+            (byte) 0x00,              // code
+            (byte) 0x82, (byte) 0xbc, // checksum
+    };
+
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        ipv6.setSourceAddress(IPV6_SOURCE_ADDRESS);
+        ipv6.setDestinationAddress(IPV6_DESTINATION_ADDRESS);
+        ipv6.setNextHeader(IPv6.PROTOCOL_ICMP6);
+    }
+
+    /**
+     * Tests serialize and setters.
+     */
+    @Test
+    public void testSerialize() {
+        ICMP6 icmp6 = new ICMP6();
+        icmp6.setIcmpType(ICMP6.ECHO_REQUEST);
+        icmp6.setIcmpCode((byte) 0);
+        icmp6.setParent(ipv6);
+
+        assertArrayEquals(bytePacket, icmp6.serialize());
+    }
+
+    /**
+     * Tests deserialize and getters.
+     */
+    @Test
+    public void testDeserialize() {
+        ICMP6 icmp6 = new ICMP6();
+        icmp6.deserialize(bytePacket, 0, bytePacket.length);
+
+        assertThat(icmp6.getIcmpType(), is(ICMP6.ECHO_REQUEST));
+        assertThat(icmp6.getIcmpCode(), is((byte) 0x00));
+        assertThat(icmp6.getChecksum(), is((short) 0x82bc));
+    }
+
+    /**
+     * Tests comparator.
+     */
+    @Test
+    public void testEqual() {
+        ICMP6 icmp61 = new ICMP6();
+        icmp61.setIcmpType(ICMP6.ECHO_REQUEST);
+        icmp61.setIcmpCode((byte) 0);
+        icmp61.setChecksum((short) 0);
+
+        ICMP6 icmp62 = new ICMP6();
+        icmp62.setIcmpType(ICMP6.ECHO_REPLY);
+        icmp62.setIcmpCode((byte) 0);
+        icmp62.setChecksum((short) 0);
+
+        assertTrue(icmp61.equals(icmp61));
+        assertFalse(icmp61.equals(icmp62));
+    }
+}

+/*
+ * Copyright 2014-2015 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.assertArrayEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for class {@link TCP}.
+ */
+public class TCPTest {
+    private static final byte[] IPV4_SOURCE_ADDRESS = {
+            (byte) 192, (byte) 168, (byte) 1, (byte) 1
+    };
+    private static final byte[] IPV4_DESTINATION_ADDRESS = {
+            (byte) 192, (byte) 168, (byte) 1, (byte) 2
+    };
+    private static final byte[] IPV6_SOURCE_ADDRESS = {
+            (byte) 0xfe, (byte) 0x80, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x01
+    };
+    private static final byte[] IPV6_DESTINATION_ADDRESS = {
+            (byte) 0xfe, (byte) 0x80, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x02
+    };
+
+    private static IPv4 ipv4 = new IPv4();
+    private static IPv6 ipv6 = new IPv6();
+    private static byte[] bytePacketTCP4 = {
+            (byte) 0x00, (byte) 0x50, (byte) 0x00, (byte) 0x60, // src,dst port
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x10, // seq
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x20, // ack
+            (byte) 0x50, (byte) 0x02, // offset,flag
+            (byte) 0x10, (byte) 0x00, // window
+            (byte) 0x1b, (byte) 0xae, // checksum
+            (byte) 0x00, (byte) 0x01  // urgent
+    };
+    private static byte[] bytePacketTCP6 = {
+            (byte) 0x00, (byte) 0x50, (byte) 0x00, (byte) 0x60, // src,dst port
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x10, // seq
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x20, // ack
+            (byte) 0x50, (byte) 0x02, // offset,flag
+            (byte) 0x10, (byte) 0x00, // window
+            (byte) 0xa1, (byte) 0xfd, // checksum
+            (byte) 0x00, (byte) 0x01  // urgent
+    };
+
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        ipv4.setSourceAddress(IPv4.toIPv4Address(IPV4_SOURCE_ADDRESS));
+        ipv4.setDestinationAddress(IPv4.toIPv4Address(IPV4_DESTINATION_ADDRESS));
+        ipv4.setProtocol(IPv4.PROTOCOL_TCP);
+
+        ipv6.setSourceAddress(IPV6_SOURCE_ADDRESS);
+        ipv6.setDestinationAddress(IPV6_DESTINATION_ADDRESS);
+        ipv6.setNextHeader(IPv6.PROTOCOL_TCP);
+    }
+
+    /**
+     * Tests serialize and setters.
+     */
+    @Test
+    public void testSerialize() {
+        TCP tcp = new TCP();
+        tcp.setSourcePort((short) 0x50);
+        tcp.setDestinationPort((short) 0x60);
+        tcp.setSequence(0x10);
+        tcp.setAcknowledge(0x20);
+        tcp.setDataOffset((byte) 0x5);
+        tcp.setFlags((short) 0x2);
+        tcp.setWindowSize((short) 0x1000);
+        tcp.setUrgentPointer((short) 0x1);
+
+        tcp.setParent(ipv4);
+        assertArrayEquals(bytePacketTCP4, tcp.serialize());
+        tcp.resetChecksum();
+        tcp.setParent(ipv6);
+        assertArrayEquals(bytePacketTCP6, tcp.serialize());
+    }
+
+    /**
+     * Tests deserialize and getters.
+     */
+    @Test
+    public void testDeserialize() {
+        TCP tcp = new TCP();
+        tcp.deserialize(bytePacketTCP4, 0, bytePacketTCP4.length);
+
+        assertThat(tcp.getSourcePort(), is((short) 0x50));
+        assertThat(tcp.getDestinationPort(), is((short) 0x60));
+        assertThat(tcp.getSequence(), is(0x10));
+        assertThat(tcp.getAcknowledge(), is(0x20));
+        assertThat(tcp.getDataOffset(), is((byte) 0x5));
+        assertThat(tcp.getFlags(), is((short) 0x2));
+        assertThat(tcp.getWindowSize(), is((short) 0x1000));
+        assertThat(tcp.getUrgentPointer(), is((short) 0x1));
+        assertThat(tcp.getChecksum(), is((short) 0x1bae));
+    }
+
+    /**
+     * Tests comparator.
+     */
+    @Test
+    public void testEqual() {
+        TCP tcp1 = new TCP();
+        tcp1.setSourcePort((short) 0x50);
+        tcp1.setDestinationPort((short) 0x60);
+        tcp1.setSequence(0x10);
+        tcp1.setAcknowledge(0x20);
+        tcp1.setDataOffset((byte) 0x5);
+        tcp1.setFlags((short) 0x2);
+        tcp1.setWindowSize((short) 0x1000);
+        tcp1.setUrgentPointer((short) 0x1);
+
+        TCP tcp2 = new TCP();
+        tcp2.setSourcePort((short) 0x70);
+        tcp2.setDestinationPort((short) 0x60);
+        tcp2.setSequence(0x10);
+        tcp2.setAcknowledge(0x20);
+        tcp2.setDataOffset((byte) 0x5);
+        tcp2.setFlags((short) 0x2);
+        tcp2.setWindowSize((short) 0x1000);
+        tcp2.setUrgentPointer((short) 0x1);
+
+        assertTrue(tcp1.equals(tcp1));
+        assertFalse(tcp1.equals(tcp2));
+    }
+}

+/*
+ * Copyright 2014-2015 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.assertArrayEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for class {@link UDP}.
+ */
+public class UDPTest {
+    private static final byte[] IPV4_SOURCE_ADDRESS = {
+            (byte) 192, (byte) 168, (byte) 1, (byte) 1
+    };
+    private static final byte[] IPV4_DESTINATION_ADDRESS = {
+            (byte) 192, (byte) 168, (byte) 1, (byte) 2
+    };
+    private static final byte[] IPV6_SOURCE_ADDRESS = {
+            (byte) 0xfe, (byte) 0x80, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x01
+    };
+    private static final byte[] IPV6_DESTINATION_ADDRESS = {
+            (byte) 0xfe, (byte) 0x80, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
+            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x02
+    };
+
+    private static IPv4 ipv4 = new IPv4();
+    private static IPv6 ipv6 = new IPv6();
+    private static byte[] bytePacketUDP4 = {
+            (byte) 0x00, (byte) 0x50, // src port
+            (byte) 0x00, (byte) 0x60, // dst port
+            (byte) 0x00, (byte) 0x08, // length
+            (byte) 0x7b, (byte) 0xda, // checksum
+    };
+    private static byte[] bytePacketUDP6 = {
+            (byte) 0x00, (byte) 0x50, // src port
+            (byte) 0x00, (byte) 0x60, // dst port
+            (byte) 0x00, (byte) 0x08, // length
+            (byte) 0x02, (byte) 0x2a, // checksum
+    };
+
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        ipv4.setSourceAddress(IPv4.toIPv4Address(IPV4_SOURCE_ADDRESS));
+        ipv4.setDestinationAddress(IPv4.toIPv4Address(IPV4_DESTINATION_ADDRESS));
+        ipv4.setProtocol(IPv4.PROTOCOL_UDP);
+
+        ipv6.setSourceAddress(IPV6_SOURCE_ADDRESS);
+        ipv6.setDestinationAddress(IPV6_DESTINATION_ADDRESS);
+        ipv6.setNextHeader(IPv6.PROTOCOL_UDP);
+    }
+
+    /**
+     * Tests serialize and setters.
+     */
+    @Test
+    public void testSerialize() {
+        UDP udp = new UDP();
+        udp.setSourcePort((short) 0x50);
+        udp.setDestinationPort((short) 0x60);
+
+        udp.setParent(ipv4);
+        assertArrayEquals(bytePacketUDP4, udp.serialize());
+        udp.resetChecksum();
+        udp.setParent(ipv6);
+        assertArrayEquals(bytePacketUDP6, udp.serialize());
+    }
+
+    /**
+     * Tests deserialize and getters.
+     */
+    @Test
+    public void testDeserialize() {
+        UDP udp = new UDP();
+        udp.deserialize(bytePacketUDP4, 0, bytePacketUDP4.length);
+
+        assertThat(udp.getSourcePort(), is((short) 0x50));
+        assertThat(udp.getDestinationPort(), is((short) 0x60));
+        assertThat(udp.getLength(), is((short) 8));
+        assertThat(udp.getChecksum(), is((short) 0x7bda));
+    }
+
+    /**
+     * Tests comparator.
+     */
+    @Test
+    public void testEqual() {
+        UDP udp1 = new UDP();
+        udp1.setSourcePort((short) 0x50);
+        udp1.setDestinationPort((short) 0x60);
+
+        UDP udp2 = new UDP();
+        udp2.setSourcePort((short) 0x70);
+        udp2.setDestinationPort((short) 0x60);
+
+        assertTrue(udp1.equals(udp1));
+        assertFalse(udp1.equals(udp2));
+    }
+}