From owner-freebsd-hackers@FreeBSD.ORG  Mon Aug 11 08:35:27 2014
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Date: Mon, 11 Aug 2014 10:26:10 +0200
From: Victor Balada Diaz <victor@bsdes.net>
To: Sushanth Rai <sushanth_rai@yahoo.com>
Subject: Re: Support for zero copy sockets
Message-ID: <20140811082610.GF7828@equilibrium.bsdes.net>
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On Mon, Aug 04, 2014 at 10:00:16AM -0700, Sushanth Rai via freebsd-hackers wrote:
> Hello,
> 
> FreeBSD 10 release sources doesn't seem to have zero copy socket code anymore. What's is alternative to do zero_copy ?
> 
> Thanks,
> Sushanth

You need to use sendfile(2). In the man page is stated that the implementation in FreeBSD
is zero copy.

You can also check:

http://svnweb.freebsd.org/base?view=revision&revision=255608

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