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 java.util.HashMap;
  12 import java.util.Map;
  13
  14 import io.netty.buffer.ByteBuf;
  15
  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.rev130731.match.v10.grouping.MatchV10;
  18
  19 /**
  20  * Serializes ofp_match (OpenFlow v1.0) structure
  21  * @author michal.polkorab
  22  */
  23 public abstract class OF10MatchSerializer {
  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     private static final int ALL = ((1 << 22) - 1);
  30
  31     /**
  32      * Encodes ofp_match (OpenFlow v1.0)
  33      * @param out output ByteBuf that match will be written into
  34      * @param match match to be encoded
  35      */
  36     public static void encodeMatchV10(ByteBuf out, MatchV10 match) {
  37         out.writeInt(encodeWildcards(match.getWildcards(), match.getNwSrcMask(), match.getNwDstMask()));
  38         out.writeShort(match.getInPort());
  39         out.writeBytes(ByteBufUtils.macAddressToBytes(match.getDlSrc().getValue()));
  40         out.writeBytes(ByteBufUtils.macAddressToBytes(match.getDlDst().getValue()));
  41         out.writeShort(match.getDlVlan());
  42         out.writeByte(match.getDlVlanPcp());
  43         ByteBufUtils.padBuffer(PADDING_IN_MATCH, out);
  44         out.writeShort(match.getDlType());
  45         out.writeByte(match.getNwTos());
  46         out.writeByte(match.getNwProto());
  47         ByteBufUtils.padBuffer(PADDING_IN_MATCH_2, out);
  48         String[] srcGroups = match.getNwSrc().getValue().split("\\.");
  49         for (int i = 0; i < srcGroups.length; i++) {
  50             out.writeByte(Integer.parseInt(srcGroups[i]));
  51         }
  52         String[] dstGroups = match.getNwDst().getValue().split("\\.");
  53         for (int i = 0; i < dstGroups.length; i++) {
  54             out.writeByte(Integer.parseInt(dstGroups[i]));
  55         }
  56         out.writeShort(match.getTpSrc());
  57         out.writeShort(match.getTpDst());
  58     }
  59
  60     private static int encodeWildcards(FlowWildcardsV10 wildcards, short srcMask, short dstMask) {
  61         int bitmask = 0;
  62         if (wildcards.isALL()) {
  63             bitmask |= ALL;
  64         } else {
  65             Map<Integer, Boolean> wildcardsMap = new HashMap<>();
  66             wildcardsMap.put(0, wildcards.isINPORT());
  67             wildcardsMap.put(1, wildcards.isDLVLAN());
  68             wildcardsMap.put(2, wildcards.isDLSRC());
  69             wildcardsMap.put(3, wildcards.isDLDST());
  70             wildcardsMap.put(4, wildcards.isDLTYPE());
  71             wildcardsMap.put(5, wildcards.isNWPROTO());
  72             wildcardsMap.put(6, wildcards.isTPSRC());
  73             wildcardsMap.put(7, wildcards.isTPDST());
  74             wildcardsMap.put(20, wildcards.isDLVLANPCP());
  75             wildcardsMap.put(21, wildcards.isNWTOS());
  76             bitmask = ByteBufUtils.fillBitMaskFromMap(wildcardsMap);
  77             bitmask |= ((32 - srcMask) << NW_SRC_SHIFT);
  78             bitmask |= ((32 - dstMask) << NW_DST_SHIFT);
  79         }
  80         return bitmask;
  81     }
  82
  83 }