org.opendaylight.protocol.bgp.parser.spi.MultiprotocolCapabilitiesUtil.java Source code

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Here is the source code for org.opendaylight.protocol.bgp.parser.spi.MultiprotocolCapabilitiesUtil.java

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/*
 * Copyright (c) 2016 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.parser.spi;

import com.google.common.base.Preconditions;
import io.netty.buffer.ByteBuf;
import java.util.Optional;
import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.bgp.parameters.optional.capabilities.CParameters;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.message.bgp.parameters.optional.capabilities.CParametersBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.BgpTableType;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.CParameters1;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.CParameters1Builder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.mp.capabilities.RouteRefreshCapabilityBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public final class MultiprotocolCapabilitiesUtil {

    private static final Logger LOG = LoggerFactory.getLogger(MultiprotocolCapabilitiesUtil.class);

    public static final CParameters RR_CAPABILITY = new CParametersBuilder()
            .addAugmentation(CParameters1.class, new CParameters1Builder()
                    .setRouteRefreshCapability(new RouteRefreshCapabilityBuilder().build()).build())
            .build();

    private static final int RESERVED = 1;

    private MultiprotocolCapabilitiesUtil() {
        throw new UnsupportedOperationException();
    }

    public static void serializeMPAfiSafi(final AddressFamilyRegistry afiReg,
            final SubsequentAddressFamilyRegistry safiReg, final Class<? extends AddressFamily> afi,
            final Class<? extends SubsequentAddressFamily> safi, final ByteBuf capBuffer) {
        final Integer afival = afiReg.numberForClass(afi);
        Preconditions.checkArgument(afival != null, "Unhandled address family " + afi);
        capBuffer.writeShort(afival);

        capBuffer.writeZero(RESERVED);

        final Integer safival = safiReg.numberForClass(safi);
        Preconditions.checkArgument(safival != null, "Unhandled subsequent address family " + safi);
        capBuffer.writeByte(safival);
    }

    public static Optional<BgpTableType> parseMPAfiSafi(final ByteBuf buffer, final AddressFamilyRegistry afiReg,
            final SubsequentAddressFamilyRegistry safiReg) {
        final int afiVal = buffer.readUnsignedShort();
        final Class<? extends AddressFamily> afi = afiReg.classForFamily(afiVal);
        if (afi == null) {
            LOG.info("Unsupported AFI {} parsed.", afiVal);
            return Optional.empty();
        }
        // skip reserved
        buffer.skipBytes(RESERVED);
        final int safiVal = buffer.readUnsignedByte();
        final Class<? extends SubsequentAddressFamily> safi = safiReg.classForFamily(safiVal);
        if (safi == null) {
            LOG.info("Unsupported SAFI {} parsed.", safiVal);
            return Optional.empty();
        }
        return Optional.of(new BgpTableTypeImpl(afi, safi));
    }
}