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 com.google.common.base.Preconditions;
11 import io.netty.buffer.ByteBuf;
12 import java.util.ArrayList;
13 import java.util.List;
14 import org.opendaylight.protocol.bgp.flowspec.handlers.FlowspecTypeParser;
15 import org.opendaylight.protocol.bgp.flowspec.handlers.FlowspecTypeSerializer;
16 import org.opendaylight.protocol.bgp.flowspec.handlers.NumericOneByteOperandParser;
17 import org.opendaylight.protocol.bgp.flowspec.handlers.Util;
18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.NumericOperand;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.FlowspecType;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.flowspec.type.DscpCase;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.flowspec.type.DscpCaseBuilder;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.flowspec.type.dscp._case.Dscps;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.flowspec.destination.flowspec.flowspec.type.dscp._case.DscpsBuilder;
25 public final class FSDscpHandler implements FlowspecTypeParser, FlowspecTypeSerializer {
26 public static final int DSCP_VALUE = 11;
29 public void serializeType(FlowspecType fsType, ByteBuf output) {
30 Preconditions.checkArgument(fsType instanceof DscpCase, "DscpCase class is mandatory!");
31 output.writeByte(DSCP_VALUE);
32 serializeDscps(((DscpCase) fsType).getDscps(), output);
36 public FlowspecType parseType(ByteBuf buffer) {
37 Preconditions.checkNotNull(buffer, "input buffer is null, missing data to parse.");
38 return new DscpCaseBuilder().setDscps(parseDscps(buffer)).build();
41 private static final void serializeDscps(final List<Dscps> dscps, final ByteBuf nlriByteBuf) {
42 for (final Dscps dscp : dscps) {
43 NumericOneByteOperandParser.INSTANCE.serialize(dscp.getOp(), 1, nlriByteBuf);
44 Util.writeShortest(dscp.getValue().getValue(), nlriByteBuf);
48 private static List<Dscps> parseDscps(final ByteBuf nlri) {
49 final List<Dscps> dscps = new ArrayList<>();
51 // we can do this as all fields will be rewritten in the cycle
52 final DscpsBuilder builder = new DscpsBuilder();
54 final byte b = nlri.readByte();
55 // RFC does not specify operator
56 final NumericOperand op = NumericOneByteOperandParser.INSTANCE.parse(b);
58 builder.setValue(new org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.flowspec.rev150807.Dscp(nlri.readUnsignedByte()));
59 end = op.isEndOfList();
60 dscps.add(builder.build());