2 * Copyright (c) 2016 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.parser.impl.message.open;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.base.Preconditions;
13 import io.netty.buffer.ByteBuf;
14 import io.netty.buffer.Unpooled;
15 import java.util.ArrayList;
16 import java.util.List;
17 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
18 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
19 import org.opendaylight.protocol.bgp.parser.spi.AddressFamilyRegistry;
20 import org.opendaylight.protocol.bgp.parser.spi.CapabilityParser;
21 import org.opendaylight.protocol.bgp.parser.spi.CapabilitySerializer;
22 import org.opendaylight.protocol.bgp.parser.spi.CapabilityUtil;
23 import org.opendaylight.protocol.bgp.parser.spi.SubsequentAddressFamilyRegistry;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.bgp.parameters.optional.capabilities.CParameters;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.bgp.parameters.optional.capabilities.CParametersBuilder;
26 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.CParameters1;
27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.CParameters1Builder;
28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.SendReceive;
29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.mp.capabilities.AddPathCapability;
30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.mp.capabilities.AddPathCapabilityBuilder;
31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.mp.capabilities.add.path.capability.AddressFamilies;
32 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.mp.capabilities.add.path.capability.AddressFamiliesBuilder;
33 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
36 public class AddPathCapabilityHandler implements CapabilityParser, CapabilitySerializer {
38 public static final int CODE = 69;
39 private static final int TRIPLET_BYTE_SIZE = 4;
41 private final AddressFamilyRegistry afiReg;
42 private final SubsequentAddressFamilyRegistry safiReg;
44 public AddPathCapabilityHandler(final AddressFamilyRegistry afiReg, final SubsequentAddressFamilyRegistry safiReg) {
45 this.afiReg = requireNonNull(afiReg);
46 this.safiReg = requireNonNull(safiReg);
50 public void serializeCapability(final CParameters capability, final ByteBuf byteAggregator) {
51 if ( (capability.getAugmentation(CParameters1.class) == null)
52 || (capability.getAugmentation(CParameters1.class).getAddPathCapability() == null) ) {
55 final AddPathCapability addPathCap = capability.getAugmentation(CParameters1.class).getAddPathCapability();
57 final List<AddressFamilies> families = addPathCap.getAddressFamilies();
58 if (families != null) {
59 final ByteBuf capBuffer = Unpooled.buffer(families.size() * TRIPLET_BYTE_SIZE);
60 for (final AddressFamilies addressFamily : families) {
61 final Class<? extends AddressFamily> afi = addressFamily.getAfi();
62 final Integer afival = this.afiReg.numberForClass(afi);
63 Preconditions.checkArgument(afival != null, "Unhandled address family " + afi);
64 capBuffer.writeShort(afival);
66 final Class<? extends SubsequentAddressFamily> safi = addressFamily.getSafi();
67 final Integer safival = this.safiReg.numberForClass(safi);
68 Preconditions.checkArgument(safival != null, "Unhandled subsequent address family " + safi);
69 capBuffer.writeByte(safival);
71 final SendReceive sendReceive = addressFamily.getSendReceive();
72 Preconditions.checkArgument(sendReceive != null, "Unhandled Send/Receive value");
73 capBuffer.writeByte(sendReceive.getIntValue());
76 CapabilityUtil.formatCapability(CODE, capBuffer, byteAggregator);
81 public CParameters parseCapability(final ByteBuf buffer) throws BGPDocumentedException, BGPParsingException {
82 final List<AddressFamilies> families = new ArrayList<>();
83 while (buffer.isReadable()) {
84 final int afiVal = buffer.readUnsignedShort();
85 final Class<? extends AddressFamily> afi = this.afiReg.classForFamily(afiVal);
87 throw new BGPParsingException("Address Family Identifier: '" + afiVal + "' not supported.");
89 final int safiVal = buffer.readUnsignedByte();
90 final Class<? extends SubsequentAddressFamily> safi = this.safiReg.classForFamily(safiVal);
92 throw new BGPParsingException("Subsequent Address Family Identifier: '" + safiVal + "' not supported.");
94 final SendReceive sendReceive = SendReceive.forValue(buffer.readUnsignedByte());
95 if (sendReceive != null) {
96 families.add(new AddressFamiliesBuilder().setAfi(afi).setSafi(safi).setSendReceive(sendReceive).build());
99 return new CParametersBuilder().addAugmentation(CParameters1.class,new CParameters1Builder().setAddPathCapability(
100 new AddPathCapabilityBuilder().setAddressFamilies(families).build()).build()).build();