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
  13 import org.opendaylight.openflowjava.protocol.api.extensibility.OFSerializer;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.FlowWildcardsV10;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.match.v10.grouping.MatchV10;
  16
  17 /**
  18  * Serializes ofp_match (OpenFlow v1.0) structure
  19  * @author michal.polkorab
  20  */
  21 public class OF10MatchSerializer implements OFSerializer<MatchV10> {
  22
  23     private static final byte PADDING_IN_MATCH = 1;
  24     private static final byte PADDING_IN_MATCH_2 = 2;
  25     private static final byte NW_SRC_SHIFT = 8;
  26     private static final byte NW_DST_SHIFT = 14;
  27
  28     /**
  29      * Serializes ofp_match (OpenFlow v1.0)
  30      * @param outBuffer output ByteBuf
  31      * @param match match to be serialized
  32      */
  33     @Override
  34     public void serialize(final MatchV10 match, final ByteBuf outBuffer) {
  35         outBuffer.writeInt(encodeWildcards(match.getWildcards(), match.getNwSrcMask(), match.getNwDstMask()));
  36         outBuffer.writeShort(match.getInPort());
  37         outBuffer.writeBytes(ByteBufUtils.macAddressToBytes(match.getDlSrc().getValue()));
  38         outBuffer.writeBytes(ByteBufUtils.macAddressToBytes(match.getDlDst().getValue()));
  39         outBuffer.writeShort(match.getDlVlan());
  40         outBuffer.writeByte(match.getDlVlanPcp());
  41         ByteBufUtils.padBuffer(PADDING_IN_MATCH, outBuffer);
  42         outBuffer.writeShort(match.getDlType());
  43         outBuffer.writeByte(match.getNwTos());
  44         outBuffer.writeByte(match.getNwProto());
  45         ByteBufUtils.padBuffer(PADDING_IN_MATCH_2, outBuffer);
  46         Iterable<String> srcGroups = ByteBufUtils.DOT_SPLITTER.split(match.getNwSrc().getValue());
  47         for (String group : srcGroups) {
  48             outBuffer.writeByte(Short.parseShort(group));
  49         }
  50         Iterable<String> dstGroups = ByteBufUtils.DOT_SPLITTER.split(match.getNwDst().getValue());
  51         for (String group : dstGroups) {
  52             outBuffer.writeByte(Short.parseShort(group));
  53         }
  54         outBuffer.writeShort(match.getTpSrc());
  55         outBuffer.writeShort(match.getTpDst());
  56     }
  57
  58     private static int encodeWildcards(final FlowWildcardsV10 wildcards, final short srcMask, final short dstMask) {
  59         int bitmask = ByteBufUtils.fillBitMask(0,
  60                 wildcards.isINPORT(),
  61                 wildcards.isDLVLAN(),
  62                 wildcards.isDLSRC(),
  63                 wildcards.isDLDST(),
  64                 wildcards.isDLTYPE(),
  65                 wildcards.isNWPROTO(),
  66                 wildcards.isTPSRC(),
  67                 wildcards.isTPDST());
  68         bitmask |= ByteBufUtils.fillBitMask(20,
  69                 wildcards.isDLVLANPCP(),
  70                 wildcards.isNWTOS());
  71         bitmask |= ((32 - srcMask) << NW_SRC_SHIFT);
  72         bitmask |= ((32 - dstMask) << NW_DST_SHIFT);
  73         return bitmask;
  74     }
  75
  76 }