[NNTP] Re: [ietf-nntp] draft-ietf-nntpext-streaming-01.txt

[Ken Murchison]

Ken Murchison wrote:

> Russ Allbery wrote:
> 
>> Ken Murchison <ken at oceana.com> writes:
>>
>>> Russ Allbery wrote:
>>
>>
>>
>>>> 431 is used for a deferral after CHECK, but we shouldn't reuse that
>>>> code since a deferral after TAKETHIS is different and the two may be
>>>> intermingled.  436 is used as the deferral for IHAVE, both as an
>>>> initial response and after the article was sent.  We could potentially
>>>> use it, but I'm not sure if that's a good idea or not.
>>
>>
>>
>>> Actually (maybe I'm being thick and/or short-sighted), but does it
>>> matter whether we're getting deferred via CHECK or TAKETHIS?  In either
>>> case we're going to have to try again.
>>
>>
>>
>> Hm.  That's a good point.  Maybe it doesn't, actually.  Can anyone else
>> think of a reason why it might matter?  (It would matter for success or
>> rejection, since the sender of CHECK and TAKETHIS commands is not 
>> required
>> to keep track of order or figure out if a particular response is in reply
>> to CHECK or to TAKETHIS, but it seems like the behavior would be the same
>> either way for a deferral.)
> 
> 
> The more I think about this, isn't 439 essentially a deferral?  It says 
> the transfer failed, but why?  Does mean that we should retry or does 
> this mean that we rejected the article (e.g. don't send it again).
> 
> I think what we need is a deferral (temp fail) code and a rejection 
> code.  We might be able to use 431 and the former and 439 as the latter. 
>  Or if 439 already means deferral, then we can probably reuse 438 as a 
> rejection code.
> 
> My guess is that  439 corresponds to 436 (second stage) and its a temp 
> failure.

Just to clarify, here's a table of current codes and meanings as I read 
them, and proposed codes where I have "[NNN]".  "NA" means not applicable.

				IHAVE	CHECK	TAKETHIS
transferred OK:			235	NA	239
send article:			335	238	NA
article not wanted:		435	438	[438]
transfer not possible (defer?):	436	431	[431]
transfer failed (defer?):	436	NA	439
transfer rejected:		437	NA	[438]

-- 
Kenneth Murchison     Oceana Matrix Ltd.
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