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