Re: Extracting a GUID as a string from a TVB, SMB2 Extra Create Parameter ...

[Pascal Quantin <pascal.quantin () gmail com>]

2014-10-04 23:17 GMT+02:00 Richard Sharpe <realrichardsharpe () gmail com>:

> Hi folks,
>
> I have come across a case where an Extra Create Parameter's TAG for a
> CREATE request is a GUID. This is like things like DH2C (Durable
> Handles V2) but it is for SHVXD, the crazy VHD over SMB2 stuff.
>
> The tag is a GUID.
>
> In dissect_smb2_olb_string, or something like it, I want to extract
> the GUID as a string, eg "9ECFCB9C-04C1-980E-..." and use that to look
> up the dissection routines ... [1]
>
> How do I extract such as a string?
>
> [1] Curiously there seems to be an example of such already in the form
> of APP_INSTANCE stuff, but it seems like the tag is encoded in that
> case in the string form of a GUID. In the SHVX case, it is a binary
> GUID. Sigh.

Hi Richard,

presumably you want to fetch the GUID from the TVB thanks to the
tvb_get_ntohguid() / tvb_get_letohguid() / tvb_get_guid() routines and then
convert it to a string thanks to guid_to_ep_str() function.

Regards,
Pascal.

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