Wireshark · Wireshark-dev: Re: [Wireshark-dev] Dissecting a field that has non-octet bit boundaries

[Anders Broman <anders.broman@xxxxxxxxxxxx>]

Hi,
You can also use proto_add_bits_item()
Regards
Anders

-----Original Message-----
From: wireshark-dev-bounces@xxxxxxxxxxxxx [mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of yannick omnes
Sent: den 23 januari 2015 08:46
To: Developer support list for Wireshark
Subject: Re: [Wireshark-dev] Dissecting a field that has non-octet bit boundaries

Hi Richard,

I had the same problem recently, that I solved using a bitmask in one of the register_info fields. It looked like that :

{
&hf_protocol_id,
             {
                 "ID", "protocol.id",
                 FT_UINT8, BASE_DEC_HEX,
                 NULL, 0x1,
                 NULL, HFILL
             },
         }

This should display only the first bit of a byte.

Hope that helps,

Regards

Yannick


Le 23/01/2015 05:46, Richard Sharpe a écrit :
> 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.
>

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