2 * Copyright (c) 2013 Pantheon Technologies s.r.o. and others. All rights reserved.
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
9 package org.opendaylight.openflowjava.protocol.impl.util;
11 import io.netty.buffer.ByteBuf;
13 import java.util.ArrayList;
14 import java.util.List;
16 import org.opendaylight.openflowjava.protocol.api.extensibility.OFDeserializer;
17 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev100924.Ipv4Address;
18 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev100924.MacAddress;
19 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.FlowWildcardsV10;
20 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.match.v10.grouping.MatchV10;
21 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.match.v10.grouping.MatchV10Builder;
23 import com.google.common.base.Joiner;
26 * Deserializes ofp_match (OpenFlow v1.0) structure
27 * @author michal.polkorab
29 public class OF10MatchDeserializer implements OFDeserializer<MatchV10> {
31 private static final byte PADDING_IN_MATCH = 1;
32 private static final byte PADDING_IN_MATCH_2 = 2;
33 private static final byte NW_SRC_BITS = 6;
34 private static final byte NW_SRC_SHIFT = 8;
35 private static final int NW_SRC_MASK = ((1 << NW_SRC_BITS) - 1) << NW_SRC_SHIFT;
36 private static final byte NW_DST_BITS = 6;
37 private static final byte NW_DST_SHIFT = 14;
38 private static final int NW_DST_MASK = ((1 << NW_DST_BITS) - 1) << NW_DST_SHIFT;
41 public MatchV10 deserialize(ByteBuf input) {
42 MatchV10Builder builder = new MatchV10Builder();
43 long wildcards = input.readUnsignedInt();
44 builder.setWildcards(createWildcards(wildcards));
45 builder.setNwSrcMask(decodeNwSrcMask(wildcards));
46 builder.setNwDstMask(decodeNwDstMask(wildcards));
47 builder.setInPort(input.readUnsignedShort());
48 byte[] dlSrc = new byte[EncodeConstants.MAC_ADDRESS_LENGTH];
49 input.readBytes(dlSrc);
50 builder.setDlSrc(new MacAddress(ByteBufUtils.macAddressToString(dlSrc)));
51 byte[] dlDst = new byte[EncodeConstants.MAC_ADDRESS_LENGTH];
52 input.readBytes(dlDst);
53 builder.setDlDst(new MacAddress(ByteBufUtils.macAddressToString(dlDst)));
55 builder.setDlVlan(input.readUnsignedShort());
56 builder.setDlVlanPcp(input.readUnsignedByte());
57 input.skipBytes(PADDING_IN_MATCH);
58 builder.setDlType(input.readUnsignedShort());
59 builder.setNwTos(input.readUnsignedByte());
60 builder.setNwProto(input.readUnsignedByte());
61 input.skipBytes(PADDING_IN_MATCH_2);
62 List<String> srcGroups = new ArrayList<>();
63 for (int i = 0; i < EncodeConstants.GROUPS_IN_IPV4_ADDRESS; i++) {
64 srcGroups.add(Short.toString(input.readUnsignedByte()));
66 Joiner joiner = Joiner.on(".");
67 builder.setNwSrc(new Ipv4Address(joiner.join(srcGroups)));
68 List<String> dstGroups = new ArrayList<>();
69 for (int i = 0; i < EncodeConstants.GROUPS_IN_IPV4_ADDRESS; i++) {
70 dstGroups.add(Short.toString(input.readUnsignedByte()));
72 builder.setNwDst(new Ipv4Address(joiner.join(dstGroups)));
73 builder.setTpSrc(input.readUnsignedShort());
74 builder.setTpDst(input.readUnsignedShort());
75 return builder.build();
79 * Decodes FlowWildcards
80 * @param input input ByteBuf
81 * @return decoded FlowWildcardsV10
83 public static FlowWildcardsV10 createWildcards(long input) {
84 boolean _iNPORT = (input & (1 << 0)) != 0;
85 boolean _dLVLAN = (input & (1 << 1)) != 0;
86 boolean _dLSRC = (input & (1 << 2)) != 0;
87 boolean _dLDST = (input & (1 << 3)) != 0;
88 boolean _dLTYPE = (input & (1 << 4)) != 0;
89 boolean _nWPROTO = (input & (1 << 5)) != 0;
90 boolean _tPSRC = (input & (1 << 6)) != 0;
91 boolean _tPDST = (input & (1 << 7)) != 0;
92 boolean _dLVLANPCP = (input & (1 << 20)) != 0;
93 boolean _nWTOS = (input & (1 << 21)) != 0;
94 return new FlowWildcardsV10(_dLDST, _dLSRC, _dLTYPE, _dLVLAN,
95 _dLVLANPCP, _iNPORT, _nWPROTO, _nWTOS, _tPDST, _tPSRC);
99 * Decodes NwSrcMask from FlowWildcards (represented as uint32)
100 * @param input binary FlowWildcards
101 * @return decoded NwSrcMask
103 public static short decodeNwSrcMask(long input) {
104 return (short) Math.max(32 - ((input & NW_SRC_MASK) >> NW_SRC_SHIFT), 0);
108 * Decodes NwDstMask from FlowWildcards (represented as uint32)
109 * @param input binary FlowWildcards
110 * @return decoded NwDstMask
112 public static short decodeNwDstMask(long input) {
113 return (short) Math.max(32 - ((input & NW_DST_MASK) >> NW_DST_SHIFT), 0);