org.opendaylight.protocol.bgp.flowspec.FSPortHandler Maven / Gradle / Ivy
/*
* Copyright (c) 2015 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.bgp.flowspec;
import static java.util.Objects.requireNonNull;
import com.google.common.base.Preconditions;
import io.netty.buffer.ByteBuf;
import java.util.ArrayList;
import java.util.List;
import org.opendaylight.protocol.bgp.flowspec.handlers.AbstractOperandParser;
import org.opendaylight.protocol.bgp.flowspec.handlers.FlowspecTypeParser;
import org.opendaylight.protocol.bgp.flowspec.handlers.FlowspecTypeSerializer;
import org.opendaylight.protocol.bgp.flowspec.handlers.NumericOneByteOperandParser;
import org.opendaylight.protocol.bgp.flowspec.handlers.NumericTwoByteOperandParser;
import org.opendaylight.protocol.util.ByteArray;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.NumericOperand;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.flowspec.FlowspecType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.flowspec.flowspec.type.PortCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.flowspec.flowspec.type.PortCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.flowspec.flowspec.type.port._case.Ports;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.flowspec.flowspec.type.port._case.PortsBuilder;
import org.opendaylight.yangtools.yang.common.Uint16;
public final class FSPortHandler implements FlowspecTypeParser, FlowspecTypeSerializer {
public static final int PORT_VALUE = 4;
@Override
public void serializeType(final FlowspecType fsType, final ByteBuf output) {
Preconditions.checkArgument(fsType instanceof PortCase, "PortCase class is mandatory!");
output.writeByte(PORT_VALUE);
NumericTwoByteOperandParser.INSTANCE.serialize(((PortCase) fsType).getPorts(), output);
}
@Override
public FlowspecType parseType(final ByteBuf buffer) {
requireNonNull(buffer, "input buffer is null, missing data to parse.");
return new PortCaseBuilder().setPorts(parsePort(buffer)).build();
}
private static List parsePort(final ByteBuf nlri) {
final List ports = new ArrayList<>();
boolean end = false;
// we can do this as all fields will be rewritten in the cycle
final PortsBuilder builder = new PortsBuilder();
while (!end) {
final byte b = nlri.readByte();
final NumericOperand op = NumericOneByteOperandParser.INSTANCE.parse(b);
builder.setOp(op);
final short length = AbstractOperandParser.parseLength(b);
builder.setValue(Uint16.valueOf(ByteArray.bytesToInt(ByteArray.readBytes(nlri, length))));
end = op.getEndOfList();
ports.add(builder.build());
}
return ports;
}
}