Java tutorial
/* * Copyright (c) 2013 Pantheon Technologies s.r.o. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.openflowjava.protocol.impl.util; import io.netty.buffer.ByteBuf; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Map; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.BosMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.DscpMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.EcnMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.EthTypeMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.Icmpv4CodeMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.Icmpv4TypeMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.Icmpv6CodeMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.Icmpv6TypeMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.Ipv4AddressMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.Ipv6AddressMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.Ipv6FlabelMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.IsidMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.MacAddressMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.MaskMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.MetadataMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.MplsLabelMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.OpCodeMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.PortMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.PortNumberMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.ProtocolNumberMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.PseudoFieldMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.TcMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.VlanPcpMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.augments.rev131002.VlanVidMatchEntry; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.Ipv6ExthdrFlags; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.types.rev130731.StandardMatchType; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.ArpOp; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.ArpSha; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.ArpSpa; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.ArpTha; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.ArpTpa; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Clazz; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.EthDst; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.EthSrc; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.EthType; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.ExperimenterClass; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Icmpv4Code; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Icmpv4Type; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Icmpv6Code; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Icmpv6Type; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.InPhyPort; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.InPort; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.IpDscp; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.IpEcn; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.IpProto; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv4Dst; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv4Src; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv6Dst; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv6Exthdr; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv6Flabel; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv6NdSll; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv6NdTarget; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv6NdTll; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Ipv6Src; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.MatchField; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Metadata; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.MplsBos; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.MplsLabel; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.MplsTc; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Nxm0Class; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.Nxm1Class; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.OpenflowBasicClass; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.OxmMatchType; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.PbbIsid; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.SctpDst; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.SctpSrc; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.TcpDst; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.TcpSrc; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.TunnelId; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.UdpDst; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.UdpSrc; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.VlanPcp; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.VlanVid; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.match.grouping.Match; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Serializes ofp_match (OpenFlow v1.3) and its oxm_fields structures * @author michal.polkorab * @author timotej.kubas */ public abstract class MatchSerializer { private static final Logger LOGGER = LoggerFactory.getLogger(MatchSerializer.class); private static final byte STANDARD_MATCH_TYPE_CODE = 0; private static final byte OXM_MATCH_TYPE_CODE = 1; private static final int NXM0_CLASS_CODE = 0x0000; private static final int NXM1_CLASS_CODE = 0x0001; private static final int OPENFLOW_BASIC_CLASS_CODE = 0x8000; private static final int EXPERIMENTER_CLASS_CODE = 0xFFFF; private static final byte MATCH_TYPE_AND_LENGTH_SIZE = 4; private static final byte MATCH_ENTRY_HEADER_LENGTH = 4; /** * Encodes match (OpenFlow v1.3) * @param match ofp_match object * @param out output ByteBuf */ public static void encodeMatch(Match match, ByteBuf out) { if (match == null) { LOGGER.debug("Match is null"); return; } encodeType(match, out); // Length of ofp_match (excluding padding) int length = computeMatchLengthInternal(match); out.writeShort(length); encodeMatchEntries(match.getMatchEntries(), out); int paddingRemainder = length % EncodeConstants.PADDING; if (paddingRemainder != 0) { ByteBufUtils.padBuffer(EncodeConstants.PADDING - paddingRemainder, out); } } private static void encodeType(Match match, ByteBuf out) { if (match.getType().isAssignableFrom(StandardMatchType.class)) { out.writeShort(STANDARD_MATCH_TYPE_CODE); } else if (match.getType().isAssignableFrom(OxmMatchType.class)) { out.writeShort(OXM_MATCH_TYPE_CODE); } } /** * Encodes MatchEntries * @param matchEntries list of match entries (oxm_fields) * @param out output ByteBuf */ public static void encodeMatchEntries(List<MatchEntries> matchEntries, ByteBuf out) { if (matchEntries == null) { LOGGER.debug("Match entries are null"); return; } for (MatchEntries entry : matchEntries) { encodeClass(entry.getOxmClass(), out); encodeRest(entry, out); } } /** * Encodes OXM ids (for Multipart - TableFeatures messages) * @param matchEntries list of match entries (oxm_fields) * @param out output ByteBuf */ public static void encodeMatchIds(List<MatchEntries> matchEntries, ByteBuf out) { if (matchEntries == null) { LOGGER.debug("Match entries are null"); return; } for (MatchEntries entry : matchEntries) { encodeClass(entry.getOxmClass(), out); MatchIdsSerializer.encodeIdsRest(entry, out); } } private static void encodeClass(Class<? extends Clazz> clazz, ByteBuf out) { if (clazz.isAssignableFrom(Nxm0Class.class)) { out.writeShort(NXM0_CLASS_CODE); } else if (clazz.isAssignableFrom(Nxm1Class.class)) { out.writeShort(NXM1_CLASS_CODE); } else if (clazz.isAssignableFrom(OpenflowBasicClass.class)) { out.writeShort(OPENFLOW_BASIC_CLASS_CODE); } else if (clazz.isAssignableFrom(ExperimenterClass.class)) { out.writeShort(EXPERIMENTER_CLASS_CODE); } } private static void encodeRest(MatchEntries entry, ByteBuf out) { int fieldValue = 0; Class<? extends MatchField> field = entry.getOxmMatchField(); if (field.isAssignableFrom(InPort.class)) { fieldValue = 0; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_INT_IN_BYTES); out.writeInt(entry.getAugmentation(PortNumberMatchEntry.class).getPortNumber().getValue().intValue()); } else if (field.isAssignableFrom(InPhyPort.class)) { fieldValue = 1; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_INT_IN_BYTES); out.writeInt(entry.getAugmentation(PortNumberMatchEntry.class).getPortNumber().getValue().intValue()); } else if (field.isAssignableFrom(Metadata.class)) { fieldValue = 2; writeMetadataRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(EthDst.class)) { fieldValue = 3; writeMacAddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(EthSrc.class)) { fieldValue = 4; writeMacAddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(EthType.class)) { fieldValue = 5; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(entry.getAugmentation(EthTypeMatchEntry.class).getEthType().getValue().shortValue()); } else if (field.isAssignableFrom(VlanVid.class)) { fieldValue = 6; VlanVidMatchEntry vlanVid = entry.getAugmentation(VlanVidMatchEntry.class); int vlanVidValue = vlanVid.getVlanVid(); if (vlanVid.isCfiBit()) { short cfi = 1 << 12; // 13-th bit vlanVidValue = vlanVidValue | cfi; } writeOxmFieldAndLength(out, fieldValue, entry.isHasMask(), EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(vlanVidValue); writeMask(entry, out, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); } else if (field.isAssignableFrom(VlanPcp.class)) { fieldValue = 7; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(VlanPcpMatchEntry.class).getVlanPcp().byteValue()); } else if (field.isAssignableFrom(IpDscp.class)) { fieldValue = 8; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(DscpMatchEntry.class).getDscp().getValue()); } else if (field.isAssignableFrom(IpEcn.class)) { fieldValue = 9; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(EcnMatchEntry.class).getEcn()); } else if (field.isAssignableFrom(IpProto.class)) { fieldValue = 10; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(ProtocolNumberMatchEntry.class).getProtocolNumber()); } else if (field.isAssignableFrom(Ipv4Src.class)) { fieldValue = 11; writeIpv4AddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(Ipv4Dst.class)) { fieldValue = 12; writeIpv4AddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(TcpSrc.class)) { fieldValue = 13; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(entry.getAugmentation(PortMatchEntry.class).getPort().getValue().intValue()); } else if (field.isAssignableFrom(TcpDst.class)) { fieldValue = 14; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(entry.getAugmentation(PortMatchEntry.class).getPort().getValue().intValue()); } else if (field.isAssignableFrom(UdpSrc.class)) { fieldValue = 15; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(entry.getAugmentation(PortMatchEntry.class).getPort().getValue().intValue()); } else if (field.isAssignableFrom(UdpDst.class)) { fieldValue = 16; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(entry.getAugmentation(PortMatchEntry.class).getPort().getValue().intValue()); } else if (field.isAssignableFrom(SctpSrc.class)) { fieldValue = 17; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(entry.getAugmentation(PortMatchEntry.class).getPort().getValue().intValue()); } else if (field.isAssignableFrom(SctpDst.class)) { fieldValue = 18; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(entry.getAugmentation(PortMatchEntry.class).getPort().getValue().intValue()); } else if (field.isAssignableFrom(Icmpv4Type.class)) { fieldValue = 19; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(Icmpv4TypeMatchEntry.class).getIcmpv4Type()); } else if (field.isAssignableFrom(Icmpv4Code.class)) { fieldValue = 20; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(Icmpv4CodeMatchEntry.class).getIcmpv4Code()); } else if (field.isAssignableFrom(ArpOp.class)) { fieldValue = 21; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(entry.getAugmentation(OpCodeMatchEntry.class).getOpCode()); } else if (field.isAssignableFrom(ArpSpa.class)) { fieldValue = 22; writeIpv4AddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(ArpTpa.class)) { fieldValue = 23; writeIpv4AddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(ArpSha.class)) { fieldValue = 24; writeMacAddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(ArpTha.class)) { fieldValue = 25; writeMacAddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(Ipv6Src.class)) { fieldValue = 26; writeIpv6AddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(Ipv6Dst.class)) { fieldValue = 27; writeIpv6AddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(Ipv6Flabel.class)) { fieldValue = 28; writeOxmFieldAndLength(out, fieldValue, entry.isHasMask(), EncodeConstants.SIZE_OF_INT_IN_BYTES); out.writeInt(entry.getAugmentation(Ipv6FlabelMatchEntry.class).getIpv6Flabel().getValue().intValue()); writeMask(entry, out, EncodeConstants.SIZE_OF_INT_IN_BYTES); } else if (field.isAssignableFrom(Icmpv6Type.class)) { fieldValue = 29; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(Icmpv6TypeMatchEntry.class).getIcmpv6Type()); } else if (field.isAssignableFrom(Icmpv6Code.class)) { fieldValue = 30; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(Icmpv6CodeMatchEntry.class).getIcmpv6Code()); } else if (field.isAssignableFrom(Ipv6NdTarget.class)) { fieldValue = 31; writeIpv6AddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(Ipv6NdSll.class)) { fieldValue = 32; writeMacAddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(Ipv6NdTll.class)) { fieldValue = 33; writeMacAddressRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(MplsLabel.class)) { fieldValue = 34; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_INT_IN_BYTES); out.writeInt(entry.getAugmentation(MplsLabelMatchEntry.class).getMplsLabel().intValue()); } else if (field.isAssignableFrom(MplsTc.class)) { fieldValue = 35; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeByte(entry.getAugmentation(TcMatchEntry.class).getTc()); } else if (field.isAssignableFrom(MplsBos.class)) { fieldValue = 36; writeOxmFieldAndLength(out, fieldValue, false, EncodeConstants.SIZE_OF_BYTE_IN_BYTES); out.writeBoolean(entry.getAugmentation(BosMatchEntry.class).isBos().booleanValue()); } else if (field.isAssignableFrom(PbbIsid.class)) { fieldValue = 37; writeOxmFieldAndLength(out, fieldValue, entry.isHasMask(), EncodeConstants.SIZE_OF_3_BYTES); out.writeMedium(entry.getAugmentation(IsidMatchEntry.class).getIsid().intValue()); writeMask(entry, out, EncodeConstants.SIZE_OF_3_BYTES); } else if (field.isAssignableFrom(TunnelId.class)) { fieldValue = 38; writeMetadataRelatedEntry(entry, out, fieldValue); } else if (field.isAssignableFrom(Ipv6Exthdr.class)) { fieldValue = 39; Ipv6ExthdrFlags pseudoField = entry.getAugmentation(PseudoFieldMatchEntry.class).getPseudoField(); Map<Integer, Boolean> map = new HashMap<>(); map.put(0, pseudoField.isNonext()); map.put(1, pseudoField.isEsp()); map.put(2, pseudoField.isAuth()); map.put(3, pseudoField.isDest()); map.put(4, pseudoField.isFrag()); map.put(5, pseudoField.isRouter()); map.put(6, pseudoField.isHop()); map.put(7, pseudoField.isUnrep()); map.put(8, pseudoField.isUnseq()); int bitmap = ByteBufUtils.fillBitMaskFromMap(map); writeOxmFieldAndLength(out, fieldValue, entry.isHasMask(), EncodeConstants.SIZE_OF_SHORT_IN_BYTES); out.writeShort(bitmap); writeMask(entry, out, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); } } private static void writeMask(MatchEntries entry, ByteBuf out, int length) { if (entry.isHasMask()) { byte[] mask = entry.getAugmentation(MaskMatchEntry.class).getMask(); if (mask != null && mask.length != length) { throw new IllegalArgumentException( "incorrect length of mask: " + mask.length + ", expected: " + length); } out.writeBytes(mask); } } protected static void writeOxmFieldAndLength(ByteBuf out, int fieldValue, boolean hasMask, int lengthArg) { int fieldAndMask = fieldValue << 1; int length = lengthArg; if (hasMask) { fieldAndMask |= 1; length *= 2; } out.writeByte(fieldAndMask); out.writeByte(length); } private static void writeMetadataRelatedEntry(MatchEntries entry, ByteBuf out, int value) { int fieldValue = value; writeOxmFieldAndLength(out, fieldValue, entry.isHasMask(), EncodeConstants.SIZE_OF_LONG_IN_BYTES); out.writeBytes(entry.getAugmentation(MetadataMatchEntry.class).getMetadata()); writeMask(entry, out, EncodeConstants.SIZE_OF_LONG_IN_BYTES); } private static void writeMacAddressRelatedEntry(MatchEntries entry, ByteBuf out, int value) { int fieldValue = value; writeOxmFieldAndLength(out, fieldValue, entry.isHasMask(), EncodeConstants.MAC_ADDRESS_LENGTH); String macAddress = entry.getAugmentation(MacAddressMatchEntry.class).getMacAddress().getValue(); out.writeBytes(ByteBufUtils.macAddressToBytes(macAddress)); // 48 b + mask [OF 1.3.2 spec] writeMask(entry, out, EncodeConstants.MAC_ADDRESS_LENGTH); } private static void writeIpv4AddressRelatedEntry(MatchEntries entry, ByteBuf out, int value) { int fieldValue = value; writeOxmFieldAndLength(out, fieldValue, entry.isHasMask(), EncodeConstants.SIZE_OF_INT_IN_BYTES); writeIpv4Address(entry, out); writeMask(entry, out, EncodeConstants.SIZE_OF_INT_IN_BYTES); } private static void writeIpv4Address(MatchEntries entry, ByteBuf out) { String[] addressGroups = entry.getAugmentation(Ipv4AddressMatchEntry.class).getIpv4Address().getValue() .split("\\."); for (int i = 0; i < addressGroups.length; i++) { out.writeByte(Integer.parseInt(addressGroups[i])); } } private static void writeIpv6AddressRelatedEntry(MatchEntries entry, ByteBuf out, int value) { int fieldValue = value; String textAddress = entry.getAugmentation(Ipv6AddressMatchEntry.class).getIpv6Address().getValue(); String[] address; if (textAddress.equals("::")) { address = new String[EncodeConstants.GROUPS_IN_IPV6_ADDRESS]; Arrays.fill(address, "0"); } else { address = parseIpv6Address(textAddress.split(":")); } writeOxmFieldAndLength(out, fieldValue, entry.isHasMask(), EncodeConstants.SIZE_OF_IPV6_ADDRESS_IN_BYTES); for (int i = 0; i < address.length; i++) { out.writeShort(Integer.parseInt(address[i], 16)); } writeMask(entry, out, EncodeConstants.SIZE_OF_IPV6_ADDRESS_IN_BYTES); } private static String[] parseIpv6Address(String[] addressGroups) { int countEmpty = 0; for (int i = 0; i < addressGroups.length; i++) { if (addressGroups[i].equals("")) { countEmpty++; } } String[] ready = new String[EncodeConstants.GROUPS_IN_IPV6_ADDRESS]; switch (countEmpty) { case 0: ready = addressGroups; break; case 1: int zerosToBePushed = EncodeConstants.GROUPS_IN_IPV6_ADDRESS - addressGroups.length + 1; int index = 0; for (int i = 0; i < addressGroups.length; i++) { if (addressGroups[i].equals("")) { for (int j = 0; j < zerosToBePushed; j++) { ready[index] = "0"; index++; } } else { ready[index] = addressGroups[i]; index++; } } break; case 2: Arrays.fill(ready, "0"); ready[ready.length - 1] = addressGroups[addressGroups.length - 1]; break; default: throw new IllegalStateException("Incorrect ipv6 address"); } return ready; } /** * Computes length of match (in bytes) * @param match * @return length of ofp_match (excluding padding) */ public static int computeMatchLengthInternal(Match match) { int length = 0; if (match != null) { length += MATCH_TYPE_AND_LENGTH_SIZE + computeMatchEntriesLength(match.getMatchEntries()); } return length; } /** * Computes length of match (in bytes) * @param match * @return length of ofp_match (excluding padding) */ public static int computeMatchLength(Match match) { int length = computeMatchLengthInternal(match); int paddingRemainder = length % EncodeConstants.PADDING; if (paddingRemainder != 0) { length += EncodeConstants.PADDING - paddingRemainder; } return length; } /** * Computes length of MatchEntries (in bytes) * @param matchEntries list of match entries (oxm_fields) * @return length of MatchEntries */ public static int computeMatchEntriesLength(List<MatchEntries> matchEntries) { int length = 0; if (matchEntries != null) { for (MatchEntries entry : matchEntries) { length += MATCH_ENTRY_HEADER_LENGTH; Class<? extends MatchField> field = entry.getOxmMatchField(); if (field.isAssignableFrom(InPort.class)) { length += EncodeConstants.SIZE_OF_INT_IN_BYTES; } else if (field.isAssignableFrom(InPhyPort.class)) { length += EncodeConstants.SIZE_OF_INT_IN_BYTES; } else if (field.isAssignableFrom(Metadata.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_LONG_IN_BYTES); } else if (field.isAssignableFrom(EthDst.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.MAC_ADDRESS_LENGTH); } else if (field.isAssignableFrom(EthSrc.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.MAC_ADDRESS_LENGTH); } else if (field.isAssignableFrom(EthType.class)) { length += EncodeConstants.SIZE_OF_SHORT_IN_BYTES; } else if (field.isAssignableFrom(VlanVid.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); } else if (field.isAssignableFrom(VlanPcp.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(IpDscp.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(IpEcn.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(IpProto.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(Ipv4Src.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_INT_IN_BYTES); } else if (field.isAssignableFrom(Ipv4Dst.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_INT_IN_BYTES); } else if (field.isAssignableFrom(TcpSrc.class)) { length += EncodeConstants.SIZE_OF_SHORT_IN_BYTES; } else if (field.isAssignableFrom(TcpDst.class)) { length += EncodeConstants.SIZE_OF_SHORT_IN_BYTES; } else if (field.isAssignableFrom(UdpSrc.class)) { length += EncodeConstants.SIZE_OF_SHORT_IN_BYTES; } else if (field.isAssignableFrom(UdpDst.class)) { length += EncodeConstants.SIZE_OF_SHORT_IN_BYTES; } else if (field.isAssignableFrom(SctpSrc.class)) { length += EncodeConstants.SIZE_OF_SHORT_IN_BYTES; } else if (field.isAssignableFrom(SctpDst.class)) { length += EncodeConstants.SIZE_OF_SHORT_IN_BYTES; } else if (field.isAssignableFrom(Icmpv4Type.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(Icmpv4Code.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(ArpOp.class)) { length += EncodeConstants.SIZE_OF_SHORT_IN_BYTES; } else if (field.isAssignableFrom(ArpSpa.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_INT_IN_BYTES); } else if (field.isAssignableFrom(ArpTpa.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_INT_IN_BYTES); } else if (field.isAssignableFrom(ArpSha.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.MAC_ADDRESS_LENGTH); } else if (field.isAssignableFrom(ArpTha.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.MAC_ADDRESS_LENGTH); } else if (field.isAssignableFrom(Ipv6Src.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_IPV6_ADDRESS_IN_BYTES); } else if (field.isAssignableFrom(Ipv6Dst.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_IPV6_ADDRESS_IN_BYTES); } else if (field.isAssignableFrom(Ipv6Flabel.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_INT_IN_BYTES); } else if (field.isAssignableFrom(Icmpv6Type.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(Icmpv6Code.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(Ipv6NdTarget.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_IPV6_ADDRESS_IN_BYTES); } else if (field.isAssignableFrom(Ipv6NdSll.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.MAC_ADDRESS_LENGTH); } else if (field.isAssignableFrom(Ipv6NdTll.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.MAC_ADDRESS_LENGTH); } else if (field.isAssignableFrom(MplsLabel.class)) { length += EncodeConstants.SIZE_OF_INT_IN_BYTES; } else if (field.isAssignableFrom(MplsTc.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(MplsBos.class)) { length += EncodeConstants.SIZE_OF_BYTE_IN_BYTES; } else if (field.isAssignableFrom(PbbIsid.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_3_BYTES); } else if (field.isAssignableFrom(TunnelId.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_LONG_IN_BYTES); } else if (field.isAssignableFrom(Ipv6Exthdr.class)) { length += computePossibleMaskEntryLength(entry, EncodeConstants.SIZE_OF_SHORT_IN_BYTES); } } } return length; } private static int computePossibleMaskEntryLength(MatchEntries entry, int length) { int entryLength = length; if (entry.isHasMask()) { entryLength *= 2; } return entryLength; } }