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PCE IETF Stateful model plugin
/*
* Copyright (c) 2013 Cisco Systems, 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.protocol.pcep.ietf.stateful;
import static com.google.common.base.Preconditions.checkArgument;
import com.google.common.primitives.UnsignedBytes;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import java.util.List;
import org.opendaylight.protocol.pcep.PCEPDeserializerException;
import org.opendaylight.protocol.pcep.spi.AbstractObjectWithTlvsParser;
import org.opendaylight.protocol.pcep.spi.ObjectUtil;
import org.opendaylight.protocol.pcep.spi.TlvRegistry;
import org.opendaylight.protocol.pcep.spi.VendorInformationTlvRegistry;
import org.opendaylight.protocol.util.BitArray;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.OperationalStatus;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.PlspId;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.error.code.tlv.LspErrorCode;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.identifiers.tlv.LspIdentifiers;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.object.Lsp;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.object.LspBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.object.lsp.Tlvs;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.lsp.object.lsp.TlvsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.path.binding.tlv.PathBinding;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.rsvp.error.spec.tlv.RsvpErrorSpec;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.ietf.stateful.rev200720.symbolic.path.name.tlv.SymbolicPathName;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Object;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.ObjectHeader;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Tlv;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.vendor.information.tlvs.VendorInformationTlv;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.vs.tlv.VsTlv;
import org.opendaylight.yangtools.yang.common.Uint32;
/**
* Parser for {@link Lsp}.
*/
public class StatefulLspObjectParser extends AbstractObjectWithTlvsParser {
private static final int CLASS = 32;
private static final int TYPE = 1;
/*
* 12b extended to 16b so first 4b are restricted (belongs to LSP ID)
*/
protected static final int DELEGATE = 11;
protected static final int SYNC = 10;
protected static final int REMOVE = 9;
protected static final int ADMINISTRATIVE = 8;
protected static final int OPERATIONAL = 5;
protected static final int FOUR_BITS_SHIFT = 4;
protected static final int FLAGS_SIZE = 12;
public StatefulLspObjectParser(final TlvRegistry tlvReg, final VendorInformationTlvRegistry viTlvReg) {
super(tlvReg, viTlvReg, CLASS, TYPE);
}
@Override
public Lsp parseObject(final ObjectHeader header, final ByteBuf bytes) throws PCEPDeserializerException {
checkArgument(bytes != null && bytes.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
final LspBuilder builder = new LspBuilder()
.setIgnore(header.getIgnore())
.setProcessingRule(header.getProcessingRule());
final int[] plspIdRaw
= new int[] { bytes.readUnsignedByte(), bytes.readUnsignedByte(), bytes.getUnsignedByte(2), };
builder.setPlspId(new PlspId(Uint32.valueOf(plspIdRaw[0] << FLAGS_SIZE | plspIdRaw[1] << FOUR_BITS_SHIFT
| plspIdRaw[2] >> FOUR_BITS_SHIFT)));
parseFlags(builder, bytes);
final TlvsBuilder b = new TlvsBuilder();
parseTlvs(b, bytes.slice());
builder.setTlvs(b.build());
return builder.build();
}
protected void parseFlags(final LspBuilder builder, final ByteBuf bytes) {
final BitArray flags = BitArray.valueOf(bytes, FLAGS_SIZE);
builder.setDelegate(flags.get(DELEGATE));
builder.setSync(flags.get(SYNC));
builder.setRemove(flags.get(REMOVE));
builder.setAdministrative(flags.get(ADMINISTRATIVE));
short oper = 0;
oper |= flags.get(OPERATIONAL + 2) ? 1 : 0;
oper |= (flags.get(OPERATIONAL + 1) ? 1 : 0) << 1;
oper |= (flags.get(OPERATIONAL) ? 1 : 0) << 2;
builder.setOperational(OperationalStatus.forValue(oper));
}
@Override
public void addTlv(final TlvsBuilder builder, final Tlv tlv) {
if (tlv instanceof LspErrorCode) {
builder.setLspErrorCode((LspErrorCode) tlv);
} else if (tlv instanceof LspIdentifiers) {
builder.setLspIdentifiers((LspIdentifiers) tlv);
} else if (tlv instanceof RsvpErrorSpec) {
builder.setRsvpErrorSpec((RsvpErrorSpec) tlv);
} else if (tlv instanceof SymbolicPathName) {
builder.setSymbolicPathName((SymbolicPathName) tlv);
} else if (tlv instanceof VsTlv) {
builder.setVsTlv((VsTlv) tlv);
} else if (tlv instanceof PathBinding) {
builder.setPathBinding((PathBinding) tlv);
}
}
@Override
public void serializeObject(final Object object, final ByteBuf buffer) {
checkArgument(object instanceof Lsp, "Wrong instance of PCEPObject. Passed %s . Needed LspObject.",
object.getClass());
final Lsp specObj = (Lsp) object;
final ByteBuf body = Unpooled.buffer();
final PlspId plspId = specObj.getPlspId();
checkArgument(plspId != null, "PLSP-ID not present");
body.writeMedium(plspId.getValue().intValue() << FOUR_BITS_SHIFT);
final BitArray flags = serializeFlags(specObj);
byte op = 0;
if (specObj.getOperational() != null) {
op = UnsignedBytes.checkedCast(specObj.getOperational().getIntValue());
op = (byte) (op << FOUR_BITS_SHIFT);
}
final byte[] res = flags.array();
res[res.length - 1] = (byte) (res[res.length - 1] | op);
body.writeByte(res[res.length - 1]);
serializeTlvs(specObj.getTlvs(), body);
ObjectUtil.formatSubobject(TYPE, CLASS, object.getProcessingRule(), object.getIgnore(), body, buffer);
}
protected BitArray serializeFlags(final Lsp specObj) {
final BitArray flags = new BitArray(FLAGS_SIZE);
flags.set(DELEGATE, specObj.getDelegate());
flags.set(REMOVE, specObj.getRemove());
flags.set(SYNC, specObj.getSync());
flags.set(ADMINISTRATIVE, specObj.getAdministrative());
return flags;
}
public void serializeTlvs(final Tlvs tlvs, final ByteBuf body) {
if (tlvs == null) {
return;
}
if (tlvs.getLspErrorCode() != null) {
serializeTlv(tlvs.getLspErrorCode(), body);
}
if (tlvs.getLspIdentifiers() != null) {
serializeTlv(tlvs.getLspIdentifiers(), body);
}
if (tlvs.getRsvpErrorSpec() != null) {
serializeTlv(tlvs.getRsvpErrorSpec(), body);
}
if (tlvs.getSymbolicPathName() != null) {
serializeTlv(tlvs.getSymbolicPathName(), body);
}
if (tlvs.getVsTlv() != null) {
serializeTlv(tlvs.getVsTlv(), body);
}
serializeVendorInformationTlvs(tlvs.getVendorInformationTlv(), body);
if (tlvs.getPathBinding() != null) {
serializeTlv(tlvs.getPathBinding(), body);
}
}
@Override
protected final void addVendorInformationTlvs(final TlvsBuilder builder, final List tlvs) {
if (!tlvs.isEmpty()) {
builder.setVendorInformationTlv(tlvs);
}
}
}