org.opendaylight.lispflowmapping.lisp.serializer.MapNotifySerializer Maven / Gradle / Ivy
/*
* Copyright (c) 2014 Contextream, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.lispflowmapping.lisp.serializer;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.lang3.BooleanUtils;
import org.opendaylight.lispflowmapping.lisp.serializer.exception.LispSerializationException;
import org.opendaylight.lispflowmapping.lisp.util.ByteUtil;
import org.opendaylight.lispflowmapping.lisp.util.NumberUtil;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MapNotify;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.MessageType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.SiteId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.XtrId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.mapnotifymessage.MapNotifyBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.mapping._record.container.MappingRecordBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.mapping._record.list.MappingRecordItem;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.mapping._record.list.MappingRecordItemBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.mapping._record.list.MappingRecordItemKey;
/**
* This class deals with serializing map notify from the java object to udp.
*/
public final class MapNotifySerializer {
private static final MapNotifySerializer INSTANCE = new MapNotifySerializer();
// Private constructor prevents instantiation from other classes
private MapNotifySerializer() {
}
public static MapNotifySerializer getInstance() {
return INSTANCE;
}
public ByteBuffer serialize(MapNotify mapNotify) {
int size = Length.HEADER_SIZE;
if (mapNotify.getAuthenticationData() != null) {
size += mapNotify.getAuthenticationData().length;
}
if (mapNotify.getXtrSiteIdPresent() != null && mapNotify.getXtrSiteIdPresent()) {
size += org.opendaylight.lispflowmapping.lisp.serializer.MapRegisterSerializer.Length.XTRID_SIZE
+ org.opendaylight.lispflowmapping.lisp.serializer.MapRegisterSerializer.Length.SITEID_SIZE;
}
for (MappingRecordItem mappingRecord : mapNotify.getMappingRecordItem()) {
size += MappingRecordSerializer.getInstance().getSerializationSize(mappingRecord.getMappingRecord());
}
ByteBuffer replyBuffer = ByteBuffer.allocate(size);
replyBuffer.put((byte) ((byte) (MessageType.MapNotify.getIntValue() << 4)
| ByteUtil.boolToBit(BooleanUtils.isTrue(mapNotify.getXtrSiteIdPresent()), Flags.XTRSITEID)));
replyBuffer.position(replyBuffer.position() + Length.RES);
replyBuffer.put(ByteUtil.boolToBit(BooleanUtils.isTrue(mapNotify.getMergeEnabled()), Flags.MERGE_ENABLED));
if (mapNotify.getMappingRecordItem() != null) {
replyBuffer.put((byte) mapNotify.getMappingRecordItem().size());
} else {
replyBuffer.put((byte) 0);
}
replyBuffer.putLong(NumberUtil.asLong(mapNotify.getNonce()));
replyBuffer.putShort(NumberUtil.asShort(mapNotify.getKeyId()));
if (mapNotify.getAuthenticationData() != null) {
replyBuffer.putShort((short) mapNotify.getAuthenticationData().length);
replyBuffer.put(mapNotify.getAuthenticationData());
} else {
replyBuffer.putShort((short) 0);
}
if (mapNotify.getMappingRecordItem() != null) {
for (MappingRecordItem mappingRecord : mapNotify.getMappingRecordItem()) {
MappingRecordSerializer.getInstance().serialize(replyBuffer, mappingRecord.getMappingRecord());
}
}
if (mapNotify.getXtrSiteIdPresent() != null && mapNotify.getXtrSiteIdPresent()) {
replyBuffer.put(mapNotify.getXtrId().getValue());
replyBuffer.put(mapNotify.getSiteId().getValue());
}
replyBuffer.clear();
return replyBuffer;
}
@SuppressWarnings("checkstyle:IllegalCatch")
public MapNotify deserialize(ByteBuffer notifyBuffer) {
try {
final byte typeAndFlags = notifyBuffer.get();
final int type = typeAndFlags >> 4;
if (MessageType.forValue(type) != MessageType.MapNotify) {
throw new LispSerializationException("Expected Map-Notify packet (type 4), but was type " + type);
}
MapNotifyBuilder builder = new MapNotifyBuilder();
builder.setMappingRecordItem(new ArrayList());
boolean xtrSiteIdPresent = ByteUtil.extractBit(typeAndFlags, Flags.XTRSITEID);
builder.setXtrSiteIdPresent(xtrSiteIdPresent);
notifyBuffer.position(notifyBuffer.position() + Length.RES);
builder.setMergeEnabled(ByteUtil.extractBit(notifyBuffer.get(), Flags.MERGE_ENABLED));
final byte recordCount = (byte) ByteUtil.getUnsignedByte(notifyBuffer);
builder.setNonce(notifyBuffer.getLong());
builder.setKeyId(notifyBuffer.getShort());
short authenticationLength = notifyBuffer.getShort();
byte[] authenticationData = new byte[authenticationLength];
notifyBuffer.get(authenticationData);
builder.setAuthenticationData(authenticationData);
if (xtrSiteIdPresent) {
List mrbs = new ArrayList<>();
for (int i = 0; i < recordCount; i++) {
mrbs.add(MappingRecordSerializer.getInstance().deserializeToBuilder(notifyBuffer));
}
byte[] xtrIdBuf = new byte[MapRegisterSerializer.Length.XTRID_SIZE];
notifyBuffer.get(xtrIdBuf);
XtrId xtrId = new XtrId(xtrIdBuf);
byte[] siteIdBuf = new byte[MapRegisterSerializer.Length.SITEID_SIZE];
notifyBuffer.get(siteIdBuf);
SiteId siteId = new SiteId(siteIdBuf);
builder.setXtrId(xtrId);
builder.setSiteId(siteId);
int idx = 0;
for (MappingRecordBuilder mrb : mrbs) {
mrb.setXtrId(xtrId);
mrb.setSiteId(siteId);
builder.getMappingRecordItem().add(new MappingRecordItemBuilder()
.withKey(new MappingRecordItemKey(Integer.toString(idx)))
.setMappingRecord(mrb.build()).build());
idx++;
}
} else {
for (int i = 0; i < recordCount; i++) {
builder.getMappingRecordItem().add(new MappingRecordItemBuilder()
.withKey(new MappingRecordItemKey(Integer.toString(i)))
.setMappingRecord(MappingRecordSerializer.getInstance().deserialize(notifyBuffer))
.build());
}
}
notifyBuffer.limit(notifyBuffer.position());
return builder.build();
} catch (RuntimeException re) {
throw new LispSerializationException("Couldn't deserialize Map-Notify (len="
+ notifyBuffer.capacity() + ")", re);
}
}
private interface Flags {
byte XTRSITEID = 0x08;
byte MERGE_ENABLED = 0x04;
}
private interface Length {
int HEADER_SIZE = 16;
int RES = 1;
}
}