2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.protocol.bgp.flowspec;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.Preconditions;
13 import io.netty.buffer.ByteBuf;
14 import java.util.ArrayList;
15 import java.util.List;
16 import org.opendaylight.protocol.bgp.flowspec.handlers.FlowspecTypeParser;
17 import org.opendaylight.protocol.bgp.flowspec.handlers.FlowspecTypeSerializer;
18 import org.opendaylight.protocol.bgp.flowspec.handlers.NumericOneByteOperandParser;
19 import org.opendaylight.protocol.bgp.flowspec.handlers.Util;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.NumericOperand;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.FlowspecType;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.flowspec.type.DscpCase;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.flowspec.type.DscpCaseBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.flowspec.type.dscp._case.Dscps;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.flowspec.type.dscp._case.DscpsBuilder;
27 public final class FSDscpHandler implements FlowspecTypeParser, FlowspecTypeSerializer {
28 public static final int DSCP_VALUE = 11;
31 public void serializeType(FlowspecType fsType, ByteBuf output) {
32 Preconditions.checkArgument(fsType instanceof DscpCase, "DscpCase class is mandatory!");
33 output.writeByte(DSCP_VALUE);
34 serializeDscps(((DscpCase) fsType).getDscps(), output);
38 public FlowspecType parseType(ByteBuf buffer) {
39 requireNonNull(buffer, "input buffer is null, missing data to parse.");
40 return new DscpCaseBuilder().setDscps(parseDscps(buffer)).build();
43 private static final void serializeDscps(final List<Dscps> dscps, final ByteBuf nlriByteBuf) {
44 for (final Dscps dscp : dscps) {
45 NumericOneByteOperandParser.INSTANCE.serialize(dscp.getOp(), 1, nlriByteBuf);
46 Util.writeShortest(dscp.getValue().getValue(), nlriByteBuf);
50 private static List<Dscps> parseDscps(final ByteBuf nlri) {
51 final List<Dscps> dscps = new ArrayList<>();
53 // we can do this as all fields will be rewritten in the cycle
54 final DscpsBuilder builder = new DscpsBuilder();
56 final byte b = nlri.readByte();
57 // RFC does not specify operator
58 final NumericOperand op = NumericOneByteOperandParser.INSTANCE.parse(b);
60 builder.setValue(new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.Dscp(nlri.readUnsignedByte()));
61 end = op.isEndOfList();
62 dscps.add(builder.build());