2 * Copyright (c) 2013 Pantheon Technologies s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.openflowjava.protocol.impl.util;
11 import io.netty.buffer.ByteBuf;
12 import io.netty.buffer.UnpooledByteBufAllocator;
14 import java.lang.reflect.InvocationTargetException;
15 import java.lang.reflect.Method;
17 import org.junit.Assert;
18 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
19 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
20 import org.opendaylight.openflowjava.util.ByteBufUtils;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.OfHeader;
22 import org.opendaylight.yangtools.yang.binding.DataContainer;
23 import org.opendaylight.yangtools.yang.binding.DataObject;
26 * @author michal.polkorab
29 public abstract class BufferHelper {
34 public static final Long DEFAULT_XID = 0x01020304L;
35 private static final byte[] XID = new byte[] { 0x01, 0x02, 0x03, 0x04 };
39 * @return ByteBuf filled with OpenFlow protocol message without first 4
42 public static ByteBuf buildBuffer(byte[] payload) {
43 ByteBuf bb = UnpooledByteBufAllocator.DEFAULT.buffer();
45 bb.writeBytes(payload);
50 * @param payload String in hex format
51 * @return ByteBuf filled with OpenFlow protocol message without first 4
54 public static ByteBuf buildBuffer(String payload) {
55 return buildBuffer(ByteBufUtils.hexStringToBytes(payload));
59 * @return ByteBuf filled with OpenFlow protocol header message without first 4
62 public static ByteBuf buildBuffer() {
63 ByteBuf bb = UnpooledByteBufAllocator.DEFAULT.buffer();
65 bb.writeBytes(new byte[0]);
70 * Use version 1.3 for encoded message
71 * @param input ByteBuf to be checked for correct OpenFlow Protocol header
72 * @param msgType type of received message
73 * @param length expected length of message in header
75 public static void checkHeaderV13(ByteBuf input, byte msgType, int length) {
76 checkHeader(input, msgType, length, (short) EncodeConstants.OF13_VERSION_ID);
80 * Use version 1.0 for encoded message
81 * @param input ByteBuf to be checked for correct OpenFlow Protocol header
82 * @param msgType type of received message
83 * @param length expected length of message in header
85 public static void checkHeaderV10(ByteBuf input, byte msgType, int length) {
86 checkHeader(input, msgType, length, (short) EncodeConstants.OF10_VERSION_ID);
89 private static void checkHeader(ByteBuf input, byte msgType, int length, Short version) {
90 Assert.assertEquals("Wrong version", version, Short.valueOf(input.readByte()));
91 Assert.assertEquals("Wrong type", msgType, input.readByte());
92 Assert.assertEquals("Wrong length", length, input.readUnsignedShort());
93 Assert.assertEquals("Wrong Xid", DEFAULT_XID, Long.valueOf(input.readUnsignedInt()));
98 * @param ofHeader OpenFlow protocol header
100 public static void checkHeaderV13(OfHeader ofHeader) {
101 checkHeader(ofHeader, (short) EncodeConstants.OF13_VERSION_ID);
105 * @param ofHeader OpenFlow protocol header
107 public static void checkHeaderV10(OfHeader ofHeader) {
108 checkHeader(ofHeader, (short) EncodeConstants.OF10_VERSION_ID);
112 * Check version and xid of OFP header.
113 * @param ofHeader OpenFlow protocol header
114 * @param version OpenFlow protocol version
116 public static void checkHeader(OfHeader ofHeader, Short version) {
117 Assert.assertEquals("Wrong version", version, ofHeader.getVersion());
118 Assert.assertEquals("Wrong Xid", DEFAULT_XID, ofHeader.getXid());
123 * @param version wire protocol number used
124 * @throws NoSuchMethodException
125 * @throws SecurityException
126 * @throws IllegalAccessException
127 * @throws IllegalArgumentException
128 * @throws InvocationTargetException
130 public static void setupHeader(Object builder, int version) throws NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
131 Method m = builder.getClass().getMethod("setVersion", Short.class);
132 m.invoke(builder, (short) version);
133 Method m2 = builder.getClass().getMethod("setXid", Long.class);
134 m2.invoke(builder, BufferHelper.DEFAULT_XID);
139 * @param decoder decoder instance
140 * @param bb data input buffer
141 * @return message decoded pojo
143 public static <E extends DataContainer> E deserialize(OFDeserializer<E> decoder, ByteBuf bb) {
144 return decoder.deserialize(bb);