Re: iscsi : numerical negotiation wording is ambiguous

[Santosh Rao <santoshr@cup.hp.com>]

Julian,

What is the responding party supposed to offer ? Is it supposed to determine the result of the
negotiation (higher or lower value, as the case may be) and send that as its response ?

Or, is it supposed to send in its numerical value and the initiator picks the higher or lower of
the 2 ?

This does'nt come across clear enough in the definition and is open to mis-interpretation. Please
see the suggested re-word in its place.

Thanks,
Santosh


Julian Satran wrote:

> Santosh,
>
> I am missing something. The rule states what value both parties should have
> after both have seen the two values.
> Obviously we assume that no error occurs and the responder value is seen y
> the offering party or the negotiation fails.
>
> What exactly is ambiguous about it?
>
> Julo
>
>
>                     Santosh Rao
>                     <santoshr@cup.       To:     ips@ece.cmu.edu (ips)
>                     hp.com>              cc:
>                     Sent by:             Subject:     iscsi : numerical negotiation wording is
>                     owner-ips@ece.        ambiguous
>                     cmu.edu
>
>
>                     26-09-01 19:59
>                     Please respond
>                     to Santosh Rao
>
>
>
> Julian & All,
>
> The definition of numerical negotiation in Section 2.2.4 of Rev 7.97
> reads :
>
> "In numerical negotiations, the offering and responding party state
>  a numerical value. The result of the negotiation is key dependent;
>  frequently the lower or the higher of the two values is used."
>
> The above definition is ambiguous, since it does not specify whether it is
> the originator or the responder that computes the result of the
> negotiation.
>
> i.e. Is it the responsibility of the target to pick the higher or lower of
> the 2 values and respond with the result of the negotiation ?
>
> OR :
> Is it the originator that has to pick the result of the negotiation
> based on the key it sent and the key it got back ?
>
> I would suggest that the wording be clarified to indicate that the
> responder picks the result of the negotiation and sends this result back
> in its response for this key.
>
> Perhaps, some re-wording along the following lines may be in order :
>
> "In numerical negotiations, the offering party states a numerical
>  value, and the responding party states the result (operational value)
>  after the negotiation.  The result of the negotiation is key
>  dependent; responder determines it based on the lower or the higher
>  of the two values - offering party's value, and what the responder
>  can support."
>
> Comments ?
>
> Regards,
> Santosh
>
> --
> #################################
> Santosh Rao
> Software Design Engineer,
> HP, Cupertino.
> email : santoshr@cup.hp.com
> Phone : 408-447-3751
> #################################
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