org.projectfloodlight.openflow.util.MultiplePktInReasonUtil Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of openflowj Show documentation

OpenFlowJ API supporting OpenFlow versions 1.0 through 1.5.1, generated by LoxiGen

The newest version!

package org.projectfloodlight.openflow.util;

import java.util.Set;

import org.projectfloodlight.openflow.protocol.OFBsnPktinFlag;
import org.projectfloodlight.openflow.protocol.OFPacketIn;
import org.projectfloodlight.openflow.protocol.OFVersion;
import org.projectfloodlight.openflow.protocol.match.Match;
import org.projectfloodlight.openflow.protocol.match.MatchField;
import org.projectfloodlight.openflow.protocol.ver13.OFBsnPktinFlagSerializerVer13;
import org.projectfloodlight.openflow.types.OFMetadata;
import org.projectfloodlight.openflow.types.U64;

import com.google.common.collect.ImmutableSet;


public class MultiplePktInReasonUtil {
    private MultiplePktInReasonUtil() {}

    /**
     * This function is used in BVS T5/6 to decode the multiple packet in
     * reasons in Match.MetaData field.
     *
     * @param pktIn the packet in message
     * @return the set of packet in reasons
     */
    public static Set getOFBsnPktinFlags(OFPacketIn pktIn) {
        if(pktIn.getVersion().compareTo(OFVersion.OF_13) < 0) {
            throw new IllegalArgumentException("multiple pkt in reasons are "
                                               + "only supported by BVS using "
                                               + "openflow version >= 1.3");
        }

        Match match = pktIn.getMatch();
        if(match == null) {
            return ImmutableSet.of();
        }
        OFMetadata metaData = match.get(MatchField.METADATA);
        if(metaData == null) {
            return ImmutableSet.of();
        }
        U64 metaDataValue = metaData.getValue();
        if(metaDataValue == null) {
            return ImmutableSet.of();
        }
        return OFBsnPktinFlagSerializerVer13.ofWireValue(metaDataValue
                                                               .getValue());
    }
}