netdev - Re: [PATCH net-next] tcp: provide SYN headers for passive connections

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Message-ID: <1430749912.3711.173.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Mon, 04 May 2015 07:31:52 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Eric B Munson <emunson@...mai.com>
Cc:	Tom Herbert <tom@...bertland.com>,
	"David S. Miller" <davem@...emloft.net>, linux-api@...r.kernel.org,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] tcp: provide SYN headers for passive
 connections

On Mon, 2015-05-04 at 10:21 -0400, Eric B Munson wrote:

> The getsockopt() for TCP_SAVE_SYN doesn't offer much over returning 0
> from TCP_SAVED_SYN if the headers are not available. Why not collapse
> these into a single option?  If you need to track the difference between
> the headers are not avialable and should have been and the headers
> should not be available it can be done through error codes from
> getsockopt().

A single option is not good, because it adds confusion.

Note that we need to set the bit on any socket state, and doing this
with a single option is not very easy. ( You got this wrong in your
patch btw)




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