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Date:      Wed, 17 Feb 2021 14:27:18 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 250363] [tcp] data in syn_ack should be ignored
Message-ID:  <bug-250363-7501-TQsSoHEL9e@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-250363-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-250363-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D250363

--- Comment #3 from Richard Scheffenegger <rscheff@freebsd.org> ---
Reading 793bis, it makes it clear that your understanding is actually corre=
ct,
data on syn,ack has been historically allowed.

However, it seems like the SYN bit should elicit an ACK for itself, immedia=
tely
followed by an ACK for the data.

Unless I misundestand this aspect, this SYN-bit only ACK is missing current=
ly,
correct?

--=20
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