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Date: Fri, 14 Aug 2009 10:05:10 +0400
From: "Andrey V. Elsukov" <bu7cher@yandex.ru>
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Cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>,
	Julian Elischer <julian@elischer.org>, freebsd-net@freebsd.org
Subject: Re: RFC: interface description
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Xin LI wrote:
> The only question I have would be, that is it possible to uniquely
> identify a NIC without assistance from kernel?  For instance, one can
> change an interface from being called "em0" to "eth0" and from "bge0" to
> "em0".  It's easy to track this information through ifconfig(8) with a
> callback, clean up the file upon restart, but we can not prevent other
> programs from calling IOCSIFNAME on the interface.  Any idea for this?

What about using interface index as a key(see if_nameindex(3))?

-- 
WBR, Andrey V. Elsukov