1 /* Copyright (C)2013 Pantheon Technologies, s.r.o. All rights reserved. */
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2 package org.opendaylight.openflowjava.protocol.impl.deserialization.factories;
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4 import java.util.ArrayList;
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5 import java.util.List;
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7 import io.netty.buffer.ByteBuf;
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9 import org.opendaylight.openflowjava.protocol.impl.deserialization.OFDeserializer;
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10 import org.opendaylight.openflowjava.protocol.impl.serialization.factories.EncodeConstants;
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11 import org.opendaylight.openflowjava.protocol.impl.serialization.factories.HelloInputMessageFactory;
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12 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.HelloElementType;
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13 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessage;
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14 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessageBuilder;
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15 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.hello.Elements;
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16 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.hello.ElementsBuilder;
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19 * @author michal.polkorab
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22 public class HelloMessageFactory implements OFDeserializer<HelloMessage> {
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24 private static HelloMessageFactory instance;
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26 private HelloMessageFactory() {
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27 // do nothing, just singleton
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31 * @return singleton factory
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33 public static synchronized HelloMessageFactory getInstance() {
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34 if (instance == null) {
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35 instance = new HelloMessageFactory();
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41 public HelloMessage bufferToMessage(ByteBuf rawMessage, short version) {
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42 HelloMessageBuilder builder = new HelloMessageBuilder();
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43 builder.setVersion(version);
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44 builder.setXid(rawMessage.readUnsignedInt());
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45 if (rawMessage.readableBytes() > 0) {
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46 builder.setElements(readElement(rawMessage));
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48 return builder.build();
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51 private static List<Elements> readElement(ByteBuf input) {
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52 List<Elements> elementsList = new ArrayList<>();
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53 while (input.readableBytes() > 0) {
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54 ElementsBuilder elementsBuilder = new ElementsBuilder();
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55 int type = input.readUnsignedShort();
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56 int elementLength = input.readUnsignedShort();
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57 if (type == HelloElementType.VERSIONBITMAP.getIntValue()) {
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58 elementsBuilder.setType(HelloElementType.forValue(type));
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59 int[] versionBitmap = new int[(elementLength - HelloInputMessageFactory.HELLO_ELEMENT_HEADER_SIZE) / 4];
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60 for (int i = 0; i < versionBitmap.length; i++) {
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61 versionBitmap[i] = (int) input.readUnsignedInt();
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63 elementsBuilder.setVersionBitmap(readVersionBitmap(versionBitmap));
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64 int paddingRemainder = elementLength % EncodeConstants.PADDING;
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65 if (paddingRemainder != 0) {
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66 input.readBytes(EncodeConstants.PADDING - paddingRemainder);
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69 elementsList.add(elementsBuilder.build());
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71 return elementsList;
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74 private static List<Boolean> readVersionBitmap(int[] input){
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75 List<Boolean> versionBitmapList = new ArrayList<>();
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76 for (int i = 0; i < input.length; i++) {
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77 int mask = input[i];
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78 for (int j = 0; j < Integer.SIZE; j++) {
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79 versionBitmapList.add((mask & (1<<j)) != 0);
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82 return versionBitmapList;
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