From: Baruch Even <baruch@ev-en.org>
To: Stephen Hemminger <shemminger@osdl.org>
Cc: Filipe Abrantes <fla@inescporto.pt>, linux-kernel@vger.kernel.org
Subject: Re: Detecting link up
Date: Wed, 18 May 2005 23:20:35 +0100 [thread overview]
Message-ID: <428BBFB3.4090702@ev-en.org> (raw)
In-Reply-To: <428B876F.8080802@osdl.org>
Stephen Hemminger wrote:
> Filipe Abrantes wrote:
>
>> Hi all,
>>
>> I need to detect when an interface (wired ethernet) has link up/down.
>> Is there a system signal which is sent when this happens? What is the
>> best way to this programatically?
>>
>> Best Regards
>>
>> Filipe
>>
>>
>
> The best way is to open a netlink socket and look for the mesaages about
> link up/down there. Read iproute2 http://developer.osdl.org/dev/iproute2
> source for ip command (ipmonitor.c).
>
> This works for almost all devices unlike ethtool and mii which only
> work on a small subset of devices.
And libnl is a very good library to get just that information without
the need to manually parse netlink messages.
Baruch
prev parent reply other threads:[~2005-05-18 22:26 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-18 10:35 Detecting link up Filipe Abrantes
2005-05-18 11:40 ` Martin Zwickel
2005-05-18 13:11 ` Vaibhav Nivargi
2005-05-18 13:57 ` Richard B. Johnson
2005-05-18 14:37 ` Max Kellermann
2005-05-18 15:00 ` Oliver Neukum
2005-05-18 15:06 ` Coywolf Qi Hunt
2005-05-18 15:11 ` Richard B. Johnson
2005-05-18 17:33 ` Michael Tokarev
2005-05-18 18:20 ` Stephen Hemminger
2005-05-18 22:20 ` Baruch Even [this message]
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