org.opendaylight.protocol.bgp.flowspec.FSIpProtocolHandler 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.group.ipv4.flowspec.flowspec.type.ProtocolIpCase;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.group.ipv4.flowspec.flowspec.type.ProtocolIpCaseBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.group.ipv4.flowspec.flowspec.type.protocol.ip._case.ProtocolIps;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev200120.flowspec.destination.group.ipv4.flowspec.flowspec.type.protocol.ip._case.ProtocolIpsBuilder;
import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;
public final class FSIpProtocolHandler implements FlowspecTypeParser, FlowspecTypeSerializer {
public static final int IP_PROTOCOL_VALUE = 3;
@Override
public void serializeType(final FlowspecType fsType, final ByteBuf output) {
Preconditions.checkArgument(fsType instanceof ProtocolIpCase, "ProtocolIpCase class is mandatory!");
output.writeByte(IP_PROTOCOL_VALUE);
NumericOneByteOperandParser.INSTANCE.serialize(((ProtocolIpCase) fsType).getProtocolIps(), output);
}
@Override
public FlowspecType parseType(final ByteBuf buffer) {
requireNonNull(buffer, "input buffer is null, missing data to parse.");
return new ProtocolIpCaseBuilder().setProtocolIps(parseProtocolIp(buffer)).build();
}
private static List parseProtocolIp(final ByteBuf nlri) {
final List ips = new ArrayList<>();
boolean end = false;
// we can do this as all fields will be rewritten in the cycle
final ProtocolIpsBuilder builder = new ProtocolIpsBuilder();
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();
ips.add(builder.build());
}
return ips;
}
}