Ethereal-dev: Re: [Ethereal-dev] Updates for packet-dcerpc-tkn4int.c

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From: "Ronnie Sahlberg" <ronnie_sahlberg@xxxxxxxxxxxxxx>
Date: Mon, 14 Apr 2003 00:44:15 +1000
I looked at it again and have some comments

First, FT_UINT64 can not be used directly in teh dissector
since the IDL files even if they use 64bit integer types, always
describe tehm as a struct (afsHyper) consisting of two individual 32 bit
scalars.

Why did DCE define proper 64bit scalars for the wire representation if they
dont plan
to use them?

Anyway,  the dissector didnt work properly since it did not take into
account that the
parameters start with a unidimensional and varying array.

I changed the dissector "slightly" and have attached it.


See how closely the dissectors match the IDL file.
The transformation from IDL to ethgereal dissector is rather trivial and i
bet a simple shellscript could be hacked up in a day or two to compile the
idl into ethereal dissectors.


One thing one might consider enhancing the dissector with is to enhance the
afsHyper handling.
Since this is a {guint32 high; guint32 low} struct and not a proper 64bit
scalar, one can not use
FT_UINT directly.
It would probably be possible to do somethinbg simple as
   guint32 type[2];
...
   dissect_ndr_uint32(... &type[0] ... )
   dissect_ndr_uint32(... &type[1]... )
...
   col_append_str(COL_INFO, " Type: %s", n64toa(type));
...
to convert it to 64 bit values for display.


please study the attached version of the dissector.


----- Original Message -----
From: "Jaime Fournier" <
Sent: Thursday, April 10, 2003 12:40 PM
Subject: [Ethereal-dev] Updates for packet-dcerpc-tkn4int.c


> Please review, and submit this patch.
> This is the first of many updates I need to submit,
> once I have cleaned them up, and removed external
> macros. Included is a trace of tkn4int packets.
>
> Thanks!
>
> =====
> Jaime Fournier

Attachment: packet-dcerpc-tkn4int.c
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