Messages in this thread |  | | Date | Thu, 27 Sep 2001 09:58:53 -0500 | From | Robert Cantu <> | Subject | Re: Question: Etherenet Link Detection |
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Ben Greear wrote:
> Peter Sandstrom wrote: > >>I know for sure that the Intel 82559 Fast Ethernet embedded controller >>has a register where it's possible to read out if the link led is active >>or not. It seems quite likely that this would be available on other >>controllers as well. >> >>Is there any functionality in the current kernel that enables a userland >>program to read this? I mostly turn my machines on and and let them do >>their thing until the hardware fails :) >> >>/Peter >> > > You can get this information out of any NIC that supports > the mii-diag protocols. The two I've used are the eepro100 > and tulip drivers... > > You can read Becker's mii-diag source for the gory details! > > Ben > >
Thaniks, all who replied.
A little clarification on my project:
I'm going to try to build a userland app that manages several different network profiles and watches the ethernet port and notifies the user of a disconnect. If the user wishes, it will be configured to unload the network profile upon disconnect (to avoid long timeouts) and upon reconnction, reload that profile. A few simple subnet detection algorithms would try to intelligently load the correct profile. This is mainly a useful solution for mobile users who have to have different set-ups for networking. It looks like the mii-diag from Becker is going to work great (thanks, all who pointed me there), and is the last component I needed to get started. I may put the project up on sourceforge as my coding skills are new and weak. Thanks for the info.
As a side note, any chance such monitoring tools/interfaces might go into a later 2.4 or 2.5 kernel and be available in the /proc fs? That would be a much more elegant solution, from a user's standpoint. Again, thanks, all!
Cheers, Robert Cantu robert@tux.ou.edu
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