openflow-protocol-impl/src/main/java/org/opendaylight/openflowjava/protocol/impl/util/OF10MatchSerializer.java

   1 /*
   2  * Copyright (c) 2013 Pantheon Technologies s.r.o. 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
   9 package org.opendaylight.openflowjava.protocol.impl.util;
  10
  11 import io.netty.buffer.ByteBuf;
  12 import org.opendaylight.openflowjava.protocol.api.extensibility.OFSerializer;
  13 import org.opendaylight.openflowjava.util.ByteBufUtils;
  14 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IetfInetUtil;
  15 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.IetfYangUtil;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.FlowWildcardsV10;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.v10.grouping.MatchV10;
  18
  19 /**
  20  * Serializes ofp_match (OpenFlow v1.0) structure
  21  * @author michal.polkorab
  22  */
  23 public class OF10MatchSerializer implements OFSerializer<MatchV10> {
  24
  25     private static final byte PADDING_IN_MATCH = 1;
  26     private static final byte PADDING_IN_MATCH_2 = 2;
  27     private static final byte NW_SRC_SHIFT = 8;
  28     private static final byte NW_DST_SHIFT = 14;
  29
  30     /**
  31      * Serializes ofp_match (OpenFlow v1.0)
  32      * @param outBuffer output ByteBuf
  33      * @param match match to be serialized
  34      */
  35     @Override
  36     public void serialize(final MatchV10 match, final ByteBuf outBuffer) {
  37         outBuffer.writeInt(encodeWildcards(match.getWildcards(), match.getNwSrcMask(), match.getNwDstMask()));
  38         outBuffer.writeShort(match.getInPort());
  39         outBuffer.writeBytes(IetfYangUtil.INSTANCE.bytesFor(match.getDlSrc()));
  40         outBuffer.writeBytes(IetfYangUtil.INSTANCE.bytesFor(match.getDlDst()));
  41         outBuffer.writeShort(match.getDlVlan());
  42         outBuffer.writeByte(match.getDlVlanPcp());
  43         outBuffer.writeZero(PADDING_IN_MATCH);
  44         outBuffer.writeShort(match.getDlType());
  45         outBuffer.writeByte(match.getNwTos());
  46         outBuffer.writeByte(match.getNwProto());
  47         outBuffer.writeZero(PADDING_IN_MATCH_2);
  48         outBuffer.writeBytes(IetfInetUtil.INSTANCE.ipv4AddressBytes(match.getNwSrc()));
  49         outBuffer.writeBytes(IetfInetUtil.INSTANCE.ipv4AddressBytes(match.getNwDst()));
  50         outBuffer.writeShort(match.getTpSrc());
  51         outBuffer.writeShort(match.getTpDst());
  52     }
  53
  54     private static int encodeWildcards(final FlowWildcardsV10 wildcards, final short srcMask, final short dstMask) {
  55         int bitmask = ByteBufUtils.fillBitMask(0,
  56                 wildcards.isINPORT(),
  57                 wildcards.isDLVLAN(),
  58                 wildcards.isDLSRC(),
  59                 wildcards.isDLDST(),
  60                 wildcards.isDLTYPE(),
  61                 wildcards.isNWPROTO(),
  62                 wildcards.isTPSRC(),
  63                 wildcards.isTPDST());
  64         bitmask |= ByteBufUtils.fillBitMask(20,
  65                 wildcards.isDLVLANPCP(),
  66                 wildcards.isNWTOS());
  67         bitmask |= ((32 - srcMask) << NW_SRC_SHIFT);
  68         bitmask |= ((32 - dstMask) << NW_DST_SHIFT);
  69         return bitmask;
  70     }
  71
  72 }