2 * Copyright (c) 2013 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 com.google.common.base.Preconditions;
11 import io.netty.buffer.ByteBuf;
12 import io.netty.buffer.Unpooled;
13 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
14 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
15 import org.opendaylight.protocol.bgp.parser.spi.AddressFamilyRegistry;
16 import org.opendaylight.protocol.bgp.parser.spi.CapabilityParser;
17 import org.opendaylight.protocol.bgp.parser.spi.CapabilitySerializer;
18 import org.opendaylight.protocol.bgp.parser.spi.CapabilityUtil;
19 import org.opendaylight.protocol.bgp.parser.spi.SubsequentAddressFamilyRegistry;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.bgp.parameters.optional.capabilities.CParameters;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.optional.capabilities.c.parameters.MultiprotocolCase;
22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.optional.capabilities.c.parameters.MultiprotocolCaseBuilder;
23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.optional.capabilities.c.parameters.multiprotocol._case.MultiprotocolCapabilityBuilder;
24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
27 public final class MultiProtocolCapabilityHandler implements CapabilityParser, CapabilitySerializer {
28 public static final int CODE = 1;
30 private final AddressFamilyRegistry afiReg;
31 private final SubsequentAddressFamilyRegistry safiReg;
33 private static final int RESERVED = 1;
35 public MultiProtocolCapabilityHandler(final AddressFamilyRegistry afiReg, final SubsequentAddressFamilyRegistry safiReg) {
36 this.afiReg = Preconditions.checkNotNull(afiReg);
37 this.safiReg = Preconditions.checkNotNull(safiReg);
41 public MultiprotocolCase parseCapability(final ByteBuf buffer) throws BGPDocumentedException, BGPParsingException {
42 final int afiVal = buffer.readUnsignedShort();
43 final Class<? extends AddressFamily> afi = this.afiReg.classForFamily(afiVal);
45 throw new BGPParsingException("Address Family Identifier: '" + afiVal + "' not supported.");
48 buffer.skipBytes(RESERVED);
49 final int safiVal = buffer.readUnsignedByte();
50 final Class<? extends SubsequentAddressFamily> safi = this.safiReg.classForFamily(safiVal);
52 throw new BGPParsingException("Subsequent Address Family Identifier: '" + safiVal + "' not supported.");
54 return new MultiprotocolCaseBuilder().setMultiprotocolCapability(
55 new MultiprotocolCapabilityBuilder().setAfi(afi).setSafi(safi).build()).build();
59 public void serializeCapability(final CParameters capability, final ByteBuf byteAggregator) {
60 Preconditions.checkArgument(capability instanceof MultiprotocolCase);
61 final MultiprotocolCase mp = (MultiprotocolCase) capability;
62 final ByteBuf capBuffer = Unpooled.buffer();
63 final Class<? extends AddressFamily> afi = mp.getMultiprotocolCapability().getAfi();
64 final Integer afival = this.afiReg.numberForClass(afi);
65 Preconditions.checkArgument(afival != null, "Unhandled address family " + afi);
66 capBuffer.writeShort(afival);
68 final Class<? extends SubsequentAddressFamily> safi = mp.getMultiprotocolCapability().getSafi();
69 final Integer safival = this.safiReg.numberForClass(safi);
70 Preconditions.checkArgument(safival != null, "Unhandled subsequent address family " + safi);
71 capBuffer.writeZero(RESERVED);
72 capBuffer.writeByte(safival);
74 CapabilityUtil.formatCapability(CODE, capBuffer, byteAggregator);