-- binary
06 1c # version, type
00 10 # length
12 34 56 78 # xid
00 01 # properties[0].type (OFPACPT_PACKET_IN_MASTER)
00 08 # properties[0].length
00 00 00 00 # mask
-- java
builder
        .setXid(0x12345678)
        .setProperties(ImmutableList.<OFAsyncConfigProp>of(factory.buildAsyncConfigPropPacketInMaster().setMask(0).build()))
        .build()