Dissecting a field that has non-octet bit boundaries

[Richard Sharpe <realrichardsharpe () gmail com>]

Hi Folks,

I am trying to dissect MS-RSVD further since I have a capture of some
of that funky SCSI tunneled over SMB2/3.

Anyway, they have a 4-byte header that consists of:

1 byte:  Protocol ID
12 bits: Protocol Version
12 bits: Operation Code

How do I deal with this. It does not seem like proto_tree_add_bitmask
is the correct thing.

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)
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