-- binary
04 12 # version, type
00 1a # 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 05 # subtype
12 34 # table_id
-- python
ofp.message.bsn_gentable_bucket_stats_request(
    xid=0x12345678,
    table_id=0x1234)