bgp/parser-impl/src/main/java/org/opendaylight/protocol/bgp/parser/impl/message/open/MultiProtocolCapabilityHandler.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.protocol.bgp.parser.impl.message.open;
   9
  10 import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
  11 import org.opendaylight.protocol.bgp.parser.BGPParsingException;
  12 import org.opendaylight.protocol.bgp.parser.impl.ParserUtil;
  13 import org.opendaylight.protocol.bgp.parser.spi.CapabilityParser;
  14 import org.opendaylight.protocol.bgp.parser.spi.CapabilitySerializer;
  15 import org.opendaylight.protocol.bgp.parser.spi.CapabilityUtil;
  16 import org.opendaylight.protocol.util.ByteArray;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130918.open.bgp.parameters.CParameters;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130918.open.bgp.parameters.c.parameters.CMultiprotocol;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130918.open.bgp.parameters.c.parameters.CMultiprotocolBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130918.open.bgp.parameters.c.parameters.c.multiprotocol.MultiprotocolCapabilityBuilder;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
  23
  24 import com.google.common.primitives.UnsignedBytes;
  25
  26 final class MultiProtocolCapabilityHandler implements CapabilityParser, CapabilitySerializer {
  27         static final int CODE = 1;
  28
  29         private static final int AFI_SIZE = 2; // bytes
  30         private static final int SAFI_SIZE = 1; // bytes
  31
  32         @Override
  33         public CMultiprotocol parseCapability(final byte[] bytes) throws BGPDocumentedException, BGPParsingException {
  34                 final Class<? extends AddressFamily> afi = ParserUtil.afiForValue(ByteArray.bytesToInt(ByteArray.subByte(bytes, 0, AFI_SIZE)));
  35                 if (afi == null) {
  36                         throw new BGPParsingException("Address Family Identifier: '" + ByteArray.bytesToInt(ByteArray.subByte(bytes, 0, AFI_SIZE))
  37                                         + "' not supported.");
  38                 }
  39                 final Class<? extends SubsequentAddressFamily> safi = ParserUtil.safiForValue(ByteArray.bytesToInt(ByteArray.subByte(bytes,
  40                                 AFI_SIZE + 1, SAFI_SIZE)));
  41                 if (safi == null) {
  42                         throw new BGPParsingException("Subsequent Address Family Identifier: '"
  43                                         + ByteArray.bytesToInt(ByteArray.subByte(bytes, AFI_SIZE + 1, SAFI_SIZE)) + "' not supported.");
  44                 }
  45
  46                 return new CMultiprotocolBuilder().setMultiprotocolCapability(
  47                                 new MultiprotocolCapabilityBuilder().setAfi(afi).setSafi(safi).build()).build();
  48         }
  49
  50         @Override
  51         public byte[] serializeCapability(final CParameters capability) {
  52                 final CMultiprotocol mp = (CMultiprotocol) capability;
  53
  54                 final int afival = ParserUtil.valueForAfi(mp.getMultiprotocolCapability().getAfi());
  55                 final int safival = ParserUtil.valueForSafi(mp.getMultiprotocolCapability().getSafi());
  56
  57                 return CapabilityUtil.formatCapability(CODE, new byte[] {
  58                                 UnsignedBytes.checkedCast(afival / 256),
  59                                 UnsignedBytes.checkedCast(afival % 256),
  60                                 0,
  61                                 UnsignedBytes.checkedCast(safival)
  62                 });
  63         }
  64 }