Re: Working group last call for service codes - reply

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Hi Gorry,

See inline for comments on comments :-).  Sorry it took so long :-(.

Tom P.

[snipped]
> I added a ref in 3.2:
> NEW:
> Network address and port translators, known collectively as NATs
> [RFC2663], may interpret DCCP ports [RFC2993] [ID.Behave-DCCP].
> 
> I also updated bullet 2 to explicitly refer to this:
> NEW:
> o	A middlebox that does not modify the intended application (e.g.
NATs
> [ID.Behave-DCCP] and Firewalls), MUST NOT change the Service Code.

[Tom P] Is this a hypothetical situation -- are there any examples of
middle boxes that *change* one application into another, different
application?  Or am I misunderstanding what you're saying?

> I have currently made this a normative reference - since this is a PS
> that speaks of a specific mechanism that is important for SC use and
> dedicated to DCCP, but I could make it informative if you think this
> better reflects the citation.

[Tom P] Normative reference sounds right to me.

> > Section 3.3.1 (mostly editorial, but maybe technical):
> > "If the receiving host is listening on a server port and the
> > DCCP-Request uses a Service Code previously associated with the
port" --
> > Would "uses a Service Code *currently* associated with the port" be
> > clearer?  The current wording seems to suggest that any SC that was
ever
> > associated with a port is OK.
> >
> Aha, I now suggest:
> OLD:
> uses a Service Code currently associated
> NEW:
> uses a Service Code that has been associated

[Tom P] That wording seems to me to say the same thing -- that any SC
ever associated with the port should be accepted.  How about "uses a
Service Code that *is* associated"?

> > Section 3.3.3 (technical):
> > So what should be the identifier in dccp-inetd?  Just a port or just
an
> > SC or a port and an SC (the last, for my thinking)?  I think that
should
> > be specified here.  I think you try to specify this in the last
> > paragraph, but it seems unclear to me.
> >
> OK, well spotted - this is vague, but intentional. I hedged away from
> detail on the inetd discussion (after various iterations with Eddie
and
> Mark). I do not have much to say from the OS point of view - I guess I
> was thinking of driving this from some of file/database with SC and
port.

[Tom P] So is there an action here?



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