openflowjava/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 package org.opendaylight.openflowjava.protocol.impl.util;
   9
  10 import io.netty.buffer.ByteBuf;
  11 import org.opendaylight.openflowjava.protocol.api.extensibility.OFSerializer;
  12 import org.opendaylight.openflowjava.util.ByteBufUtils;
  13 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IetfInetUtil;
  14 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.IetfYangUtil;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.FlowWildcardsV10;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev150225.match.v10.grouping.MatchV10;
  17
  18 /**
  19  * Serializes ofp_match (OpenFlow v1.0) structure.
  20  *
  21  * @author michal.polkorab
  22  */
  23 public class OF10MatchSerializer implements OFSerializer<MatchV10> {
  24     private static final byte PADDING_IN_MATCH = 1;
  25     private static final byte PADDING_IN_MATCH_2 = 2;
  26     private static final byte NW_SRC_SHIFT = 8;
  27     private static final byte NW_DST_SHIFT = 14;
  28
  29     /**
  30      * Serializes ofp_match (OpenFlow v1.0).
  31      *
  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().toJava(),
  38                     match.getNwDstMask().toJava()));
  39         outBuffer.writeShort(match.getInPort().toJava());
  40         outBuffer.writeBytes(IetfYangUtil.macAddressBytes(match.getDlSrc()));
  41         outBuffer.writeBytes(IetfYangUtil.macAddressBytes(match.getDlDst()));
  42         outBuffer.writeShort(match.getDlVlan().toJava());
  43         outBuffer.writeByte(match.getDlVlanPcp().toJava());
  44         outBuffer.writeZero(PADDING_IN_MATCH);
  45         outBuffer.writeShort(match.getDlType().toJava());
  46         outBuffer.writeByte(match.getNwTos().toJava());
  47         outBuffer.writeByte(match.getNwProto().toJava());
  48         outBuffer.writeZero(PADDING_IN_MATCH_2);
  49         outBuffer.writeBytes(IetfInetUtil.ipv4AddressBytes(match.getNwSrc()));
  50         outBuffer.writeBytes(IetfInetUtil.ipv4AddressBytes(match.getNwDst()));
  51         outBuffer.writeShort(match.getTpSrc().toJava());
  52         outBuffer.writeShort(match.getTpDst().toJava());
  53     }
  54
  55     private static int encodeWildcards(final FlowWildcardsV10 wildcards, final short srcMask, final short dstMask) {
  56         int bitmask = ByteBufUtils.fillBitMask(0,
  57                 wildcards.getINPORT(),
  58                 wildcards.getDLVLAN(),
  59                 wildcards.getDLSRC(),
  60                 wildcards.getDLDST(),
  61                 wildcards.getDLTYPE(),
  62                 wildcards.getNWPROTO(),
  63                 wildcards.getTPSRC(),
  64                 wildcards.getTPDST());
  65         bitmask |= ByteBufUtils.fillBitMask(20,
  66                 wildcards.getDLVLANPCP(),
  67                 wildcards.getNWTOS());
  68         bitmask |= 32 - srcMask << NW_SRC_SHIFT;
  69         bitmask |= 32 - dstMask << NW_DST_SHIFT;
  70         return bitmask;
  71     }
  72 }