-- binary
04 12 # version, type
00 18 # length
12 34 56 78 # xid
ff ff # stats_type
00 00 # flags
00 00 00 00 # pad
00 5c 16 c7 # experimenter
00 00 00 04 # subtype
-- python
ofp.message.bsn_gentable_desc_stats_request(
    xid=0x12345678)