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Date:      Fri, 26 Jun 1998 14:38:22 PDT
From:      Bill Fenner <fenner@parc.xerox.com>
To:        Archie Cobbs <archie@whistle.com>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: Apparent bug in sendto() with raw sockets 
Message-ID:  <98Jun26.143824pdt.177515@crevenia.parc.xerox.com>
In-Reply-To: Your message of "Fri, 26 Jun 98 13:59:25 PDT." <199806262059.NAA01163@bubba.whistle.com> 

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In message <199806262059.NAA01163@bubba.whistle.com> Archie Cobbs wrote:
>The BPF code had a similar bug, where you would read an IP packet
>and get some of the header fields reversed.

This is not a bug in the code.  This is a bug in the interface.  The
BPF interface gives you the packet as it appears on the wire, so it's a
bug for BPF not to do that.  The raw IP interface exposes the
ip_output() interface as protocols would use it, and the demuxed
protocol interface as ip_input() passes packets to protocols.  If we
want to change the raw IP interface to "exactly as the packet appears
on the wire", then that is a change in the interface and has to be
handled much more carefully than a bug fix.

  Bill

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