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Date:      Wed, 17 Apr 2002 12:09:00 -0700
From:      Bill Fenner <fenner@research.att.com>
To:        silby@silby.com
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: What does FreeBSD do when listen queue is full ?
Message-ID:  <200204171909.MAA01611@windsor.research.att.com>

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>I just did a quick look over the code, and it appears that the complete
>connection queue is still intact, and takes on 3/2*listen backlog as its
>length.  Therefore, if sendmail is deciding to not accept() all
>connections ASAP, a backlog will build up, and RSTs will be sent to
>incoming connections.

Boy, I hope not.  Incoming SYNs should be ignored if the backlog
is met, so that the client can retransmit them.  I know Microsoft
decided to use RST as a "my queue is full" indicator, but I hope
we're not following in their footsteps!...

  Bill

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