org.opendaylight.protocol.bgp.flowspec.FSIpv6NextHeaderHandler 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 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.group.ipv6.flowspec.flowspec.type.NextHeaderCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.group.ipv6.flowspec.flowspec.type.NextHeaderCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.group.ipv6.flowspec.flowspec.type.next.header._case.NextHeaders;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.group.ipv6.flowspec.flowspec.type.next.header._case.NextHeadersBuilder;
import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
public final class FSIpv6NextHeaderHandler implements FlowspecTypeParser, FlowspecTypeSerializer {
public static final int NEXT_HEADER_VALUE = 3;
@Override
public void serializeType(final FlowspecType value, final ByteBuf output) {
Preconditions.checkArgument(value instanceof NextHeaderCase, "NextHeaderCase class is mandatory!");
output.writeByte(NEXT_HEADER_VALUE);
NumericOneByteOperandParser.INSTANCE.serialize(((NextHeaderCase) value).getNextHeaders(), output);
}
@Override
public FlowspecType parseType(final ByteBuf buffer) {
if (buffer == null) {
return null;
}
return new NextHeaderCaseBuilder().setNextHeaders(parseNextHeader(buffer)).build();
}
private static List parseNextHeader(final ByteBuf nlri) {
final List headers = new ArrayList<>();
boolean end = false;
// we can do this as all fields will be rewritten in the cycle
final NextHeadersBuilder builder = new NextHeadersBuilder();
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();
headers.add(builder.build());
}
return headers;
}
}