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.deserialization.factories;
11 import static org.opendaylight.yangtools.yang.common.netty.ByteBufUtils.readUint32;
13 import io.netty.buffer.ByteBuf;
14 import java.util.ArrayList;
15 import java.util.List;
16 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
17 import org.opendaylight.openflowjava.protocol.api.util.EncodeConstants;
18 import org.opendaylight.openflowjava.protocol.impl.util.VersionAssignableFactory;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.HelloElementType;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessage;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessageBuilder;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.hello.Elements;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.hello.ElementsBuilder;
26 * Translates Hello messages. OF protocol versions: 1.3, 1.4, 1.5.
28 * @author michal.polkorab
29 * @author timotej.kubas
31 public class HelloMessageFactory extends VersionAssignableFactory implements OFDeserializer<HelloMessage> {
33 private static final byte HELLO_ELEMENT_HEADER_SIZE = 4;
36 public HelloMessage deserialize(ByteBuf rawMessage) {
37 HelloMessageBuilder builder = new HelloMessageBuilder();
38 builder.setVersion(getVersion());
39 builder.setXid(readUint32(rawMessage));
40 if (rawMessage.readableBytes() > 0) {
41 builder.setElements(readElement(rawMessage));
43 return builder.build();
46 private static List<Elements> readElement(ByteBuf input) {
47 List<Elements> elementsList = new ArrayList<>();
48 while (input.readableBytes() > 0) {
49 ElementsBuilder elementsBuilder = new ElementsBuilder();
50 int type = input.readUnsignedShort();
51 int elementLength = input.readUnsignedShort();
52 if (type == HelloElementType.VERSIONBITMAP.getIntValue()) {
53 elementsBuilder.setType(HelloElementType.forValue(type));
54 int[] versionBitmap = new int[(elementLength - HELLO_ELEMENT_HEADER_SIZE) / 4];
55 for (int i = 0; i < versionBitmap.length; i++) {
56 versionBitmap[i] = (int) input.readUnsignedInt();
58 elementsBuilder.setVersionBitmap(readVersionBitmap(versionBitmap));
59 int paddingRemainder = elementLength % EncodeConstants.PADDING;
60 if (paddingRemainder != 0) {
61 input.readBytes(EncodeConstants.PADDING - paddingRemainder);
66 elementsList.add(elementsBuilder.build());
71 private static List<Boolean> readVersionBitmap(int[] input) {
72 List<Boolean> versionBitmapList = new ArrayList<>();
73 for (int mask : input) {
74 for (int j = 0; j < Integer.SIZE; j++) {
75 versionBitmapList.add((mask & 1 << j) != 0);
78 return versionBitmapList;