[Bug 258732] [tcp] TCP_MAXSEG does not work

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 08 Oct 2021 09:03:44 UTC

--- Comment #9 from Michael Tuexen <tuexen@freebsd.org> ---
(In reply to zhh0000zhh from comment #8)
Sure, the MSS can be different in each direction. Each node declares its
maximum receive size.

However, I do not understand
* How the Nagle algorithm is involved in this discussion
* Why an application cares about the MSS. TCP is a byte stream. At the API
level you have no guarantee that the data you receive has any relation to the
segmentation which was used by the peer. On the sending side, you don't have to
care about the segmentation process.

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