org.opendaylight.protocol.bgp.flowspec.FSIcmpCodeHandler 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.FlowspecTypeParser;
import org.opendaylight.protocol.bgp.flowspec.handlers.FlowspecTypeSerializer;
import org.opendaylight.protocol.bgp.flowspec.handlers.NumericOneByteOperandParser;
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.IcmpCodeCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.flowspec.flowspec.type.IcmpCodeCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.flowspec.flowspec.type.icmp.code._case.Codes;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.flowspec.flowspec.type.icmp.code._case.CodesBuilder;
import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
public final class FSIcmpCodeHandler implements FlowspecTypeParser, FlowspecTypeSerializer {
public static final int ICMP_CODE_VALUE = 8;
@Override
public void serializeType(final FlowspecType fsType, final ByteBuf output) {
Preconditions.checkArgument(fsType instanceof IcmpCodeCase, "IcmpCodeCase class is mandatory!");
output.writeByte(ICMP_CODE_VALUE);
NumericOneByteOperandParser.INSTANCE.serialize(((IcmpCodeCase) fsType).getCodes(), output);
}
@Override
public FlowspecType parseType(final ByteBuf buffer) {
requireNonNull(buffer, "input buffer is null, missing data to parse.");
return new IcmpCodeCaseBuilder().setCodes(parseIcmpCode(buffer)).build();
}
private static List parseIcmpCode(final ByteBuf nlri) {
final List codes = new ArrayList<>();
boolean end = false;
// we can do this as all fields will be rewritten in the cycle
final CodesBuilder builder = new CodesBuilder();
while (!end) {
final byte b = nlri.readByte();
final NumericOperand op = NumericOneByteOperandParser.INSTANCE.parse(b);
builder.setOp(op);
builder.setValue(ByteBufUtils.readUint8(nlri));
end = op.getEndOfList();
codes.add(builder.build());
}
return codes;
}
}