Date: Wed, 10 Jan 2001 08:57:14 -0500 (EST) From: Robert Watson <rwatson@freebsd.org> To: Samuel Tardieu <sam@inf.enst.fr> Cc: hackers@freebsd.org Subject: Re: Link up/down events Message-ID: <Pine.NEB.3.96L.1010110085515.78872B-100000@fledge.watson.org> In-Reply-To: <2001-01-10-12-03-26%2Btrackit%2Bsam@inf.enst.fr>
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On Wed, 10 Jan 2001, Samuel Tardieu wrote: > Is there a way to be warned about ethernet link up/down events? I have a > laptop with an internal fxp0 interface, and I'd like to launch/kill > dhclient whenever the link goes up/down. I've been wondering about this also -- Darwin has this, and it's pretty cool to watch dhclient run as soon as the ethernet cable is stuck in, and not have to dig around to find out how to pursuade the system to make the change. Windows 2000 also appears to do this for appropriate ethernet cards. The traditional means of notifying userland processes of interface/network events has been the routing socket -- presumably we want to notify on interface arrive / depart, as well as for condition changes, including a link up / down (differentiated from administrative up / down). Robert N M Watson FreeBSD Core Team, TrustedBSD Project robert@fledge.watson.org NAI Labs, Safeport Network Services To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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