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 java.util.HashMap;
  14 import java.util.Map;
  15
  16 import org.opendaylight.openflowjava.protocol.api.extensibility.OFSerializer;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.FlowWildcardsV10;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.match.v10.grouping.MatchV10;
  19
  20 /**
  21  * Serializes ofp_match (OpenFlow v1.0) structure
  22  * @author michal.polkorab
  23  */
  24 public class OF10MatchSerializer implements OFSerializer<MatchV10> {
  25
  26     private static final byte PADDING_IN_MATCH = 1;
  27     private static final byte PADDING_IN_MATCH_2 = 2;
  28     private static final byte NW_SRC_SHIFT = 8;
  29     private static final byte NW_DST_SHIFT = 14;
  30
  31     /**
  32      * Serializes ofp_match (OpenFlow v1.0)
  33      * @param outBuffer output ByteBuf
  34      * @param match match to be serialized
  35      */
  36     @Override
  37     public void serialize(final MatchV10 match, final ByteBuf outBuffer) {
  38         outBuffer.writeInt(encodeWildcards(match.getWildcards(), match.getNwSrcMask(), match.getNwDstMask()));
  39         outBuffer.writeShort(match.getInPort());
  40         outBuffer.writeBytes(ByteBufUtils.macAddressToBytes(match.getDlSrc().getValue()));
  41         outBuffer.writeBytes(ByteBufUtils.macAddressToBytes(match.getDlDst().getValue()));
  42         outBuffer.writeShort(match.getDlVlan());
  43         outBuffer.writeByte(match.getDlVlanPcp());
  44         ByteBufUtils.padBuffer(PADDING_IN_MATCH, outBuffer);
  45         outBuffer.writeShort(match.getDlType());
  46         outBuffer.writeByte(match.getNwTos());
  47         outBuffer.writeByte(match.getNwProto());
  48         ByteBufUtils.padBuffer(PADDING_IN_MATCH_2, outBuffer);
  49         Iterable<String> srcGroups = ByteBufUtils.DOT_SPLITTER.split(match.getNwSrc().getValue());
  50         for (String group : srcGroups) {
  51             outBuffer.writeByte(Short.parseShort(group));
  52         }
  53         Iterable<String> dstGroups = ByteBufUtils.DOT_SPLITTER.split(match.getNwDst().getValue());
  54         for (String group : dstGroups) {
  55             outBuffer.writeByte(Short.parseShort(group));
  56         }
  57         outBuffer.writeShort(match.getTpSrc());
  58         outBuffer.writeShort(match.getTpDst());
  59     }
  60
  61     private static int encodeWildcards(final FlowWildcardsV10 wildcards, final short srcMask, final short dstMask) {
  62         int bitmask = 0;
  63         Map<Integer, Boolean> wildcardsMap = new HashMap<>();
  64         wildcardsMap.put(0, wildcards.isINPORT());
  65         wildcardsMap.put(1, wildcards.isDLVLAN());
  66         wildcardsMap.put(2, wildcards.isDLSRC());
  67         wildcardsMap.put(3, wildcards.isDLDST());
  68         wildcardsMap.put(4, wildcards.isDLTYPE());
  69         wildcardsMap.put(5, wildcards.isNWPROTO());
  70         wildcardsMap.put(6, wildcards.isTPSRC());
  71         wildcardsMap.put(7, wildcards.isTPDST());
  72         wildcardsMap.put(20, wildcards.isDLVLANPCP());
  73         wildcardsMap.put(21, wildcards.isNWTOS());
  74         bitmask = ByteBufUtils.fillBitMaskFromMap(wildcardsMap);
  75         bitmask |= ((32 - srcMask) << NW_SRC_SHIFT);
  76         bitmask |= ((32 - dstMask) << NW_DST_SHIFT);
  77         return bitmask;
  78     }
  79
  80 }