case PACKET_IN:
OFPacketIn pktIn = (OFPacketIn)msg;
packet.setSwPortTuple(new SwitchPortTuple(sw.getId(),
pktIn.getInPort()));
bb = ChannelBuffers.buffer(pktIn.getLength());
pktIn.writeTo(bb);
packet.setData(OFMessage.getData(sw, msg, cntx));
break;
case PACKET_OUT:
OFPacketOut pktOut = (OFPacketOut)msg;
packet.setSwPortTuple(new SwitchPortTuple(sw.getId(),