Re: Question related with DAUD Message

Ankit,

Ankit Kumar Sharma wrote:                                                            (Thu, 01 Feb 2007 09:43:08)
> 
>    On 1/31/07, Barry Nagelberg <[1][email protected]> wrote:
> 
>      Oscar,
>      There is nothing in the RFC which states that "there is no limit to
>      the number of point codes in the DAUD (or DUNA or
>      DAVA)".
> 
>    Max  limit  could  be  calculated  from  the   max  value  of 'length'
>    parameter
> 
>      This is an interoperability bug in the RFC, because obviously there
>      must be some limit - an SGP could run out of
>      resources  if  the  ASP  sends  it  a DAUD msg with a billion point
>      codes. A limit of 1024 sounds reasonable to me.
> 
>    Not billion...we could send maximum 16382 point codes in a DAUD
> 
>      The  main  point  facing us now is that the size of the limit is an
>      implementation decision for each vendor. I suggest that
>      the RFC be updated to state explicity what the limit is - otherwise
>      this will continue to cause interoperability
>      problems.
> 
>    I agree with you...
> 

And so, to conform nicely to your limit, the ASP sends 1 billion DAUDs with
1 point code in each...  (Perhaps each with an all-ones mask.)  How can
your limit help this poorly designed SG?

An SG design that cannot handle an ASP with the "Babbling Idiot" syndrome
will always be vulnerable in such situations.  A more robust design would
not allow an ASP to usurp resources critical to other tasks.

--brian

-- 
Brian F. G. Bidulock
[email protected]
http://www.openss7.org/