Date: Sat, 07 May 2011 21:22:28 -0400 From: Brian Seklecki <bseklecki@probikesllc.com> To: freebsd-questions@freebsd.org Subject: Re: Link and network level in the tcp/ip stack Message-ID: <4DC5F054.4000308@probikesllc.com> In-Reply-To: <4DC5CA83.6080009@locolomo.org> References: <214923.99033.qm@web111721.mail.gq1.yahoo.com> <4DC5CA83.6080009@locolomo.org>
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On 5/7/2011 6:41 PM, Erik Nørgaard wrote: > So the question is which behaviour is correct, recommended or accepted? > Stripping the link layer and reply according to the network layer, or > keeping the link layer? This is the way it in every TCP/IP stack out there. The routing decision for the reply IP packet of the ICMP message is made independently of the upper-OSI-layer TCP state. In this instance, its a bit inconvenient for you, but having these layers abstracted makes for incredible flexibility in TCP/IP; the same thinking as small POSIX utilities work independently is more flexible. -- Brian A. Seklecki <bseklecki@probikesllc.com> CE-Pro Bikes, LLC 412-378-3823 (m) PGP Key Available Upon Request
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