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From: John Goerzen <jgoerzen@complete•org>
To: Hadmut Danisch <hadmut@danisch•de>
Cc: nncp-devel@lists.cypherpunks.su
Subject: Re: ACK packets?
Date: Sat, 13 Dec 2025 17:11:57 -0600	[thread overview]
Message-ID: <878qf6geo2.fsf@complete.org> (raw)
In-Reply-To: <052d4662-fa33-4731-a5f4-97cdd2420b9c@danisch.de> (Hadmut Danisch's message of "Sun, 14 Dec 2025 00:50:16 +0200")

Hi Hadmut,

ACK packets are most useful when used with nncp-xfer and such.  You
could also use them if you think that, for instance, machine B in your
example is not entirely reliable.

I have an article at

https://www.complete.org/dead-usb-drives-are-fine-building-a-reliable-sneakernet/

that may explain it more for you.

- John


On Sun, Dec 14 2025, Hadmut Danisch wrote:

> Hi,
>
>
> when sending A->B->C, then C can send ACKs back C->B->A.
>
> But what exactly do these ACKs on A then?
>
>
> http://www.nncpgo.org/ACK.html is not really talkative about that and explains,
> that one can send ACKs, but only nncp-xfer seems to support -keep, and the
> explanation suggests that these ACKs are used for manual administration.
>
>
>
> I would have thought that regular messages generated from nncp-file or nncp-exec
> are kept after sending, until ACKed, and resent if not ACKed withon reasonable
> (=configurable) time.
>
>
> regards
>
> Hadmut

  reply	other threads:[~2025-12-13 23:12 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-12-13 22:50 ACK packets? Hadmut Danisch
2025-12-13 23:11 ` John Goerzen [this message]
2025-12-13 23:42   ` Hadmut Danisch
2025-12-15  5:41     ` John Goerzen
2025-12-15 11:40       ` Hadmut Danisch