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List:       linux-net
Subject:    Re: stop and continue network interface
From:       Peter =?iso-8859-1?Q?W=E4chtler?= <pwaechtler () loewe-komp ! de>
Date:       2001-06-29 8:18:16
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Frank Neuber wrote:
> 
> I write a kernel module that control all network interfaces via
> an hardware plug on the parallel port. If the plug is connected to
> the parallel port then (after a few seconds) the network interface
> should stop. If th plug is disconnected then the network interface should
> comes up with the same configuration. In other words, it should be the
> same behaviour to the network as an diconnected cable on the NIC while
> the plug is connected.
> 
> What is the right layer/function to realize this? It should be independent
> from the hardware. Should I block the transmit and receive functions
> in the networking layer? Or is there a simple way to do this.
> 

Well, the network is configured from user space - so I would stop
the network from user space. I would write a daemon that observes
the parport and calls a script like "rcroute stop;rcnetwork stop"
and "rcnetwork start;rcroute start"
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