Since the ethernet driver will detect carrier on the ethernet if you could detect the error correctly you'd be able to know if the ethernet was hooked up. Trying to send a packet is easy. Trapping the error correctly may be the hard part. If the kernel would log such a message then you could just monitor the log. This is a kind of braindead approach but may be the least intrusive and easiest.
Justin Hagemeier wrote: > "Jens B. Jorgensen" wrote: > > > I don't know if anyone's come up with a slick way to do this. I too would > > like to have such a thing at my disposal. You might be able to do something > > like this by just running dhcp and then checking to see if dhcp succeeded > > in getting an address and starting diald if it didn't. > > > > Good luck, > > > > Justin Hagemeier wrote: > > > > > I have a laptop with three possible network configurations that I would > > > like to use. > > > 1. Ethernet 10 Mbps DHCP-sv > > > 2. PPP daild > > > 3. None at all > > > is there any suggestions on tools for configuration techniques for this > > > kind of setup. It looks as if I could do it if one of the init.d scripts > > > sniffed out the PCMCIA to see if there where activity, then if there was > > > not it would start daild instead of DHCP. I have no idea where to begin > > > on such a thing though. Any thoughts? > > > Thanks in advance, > > > Justin > > > > -- > > Jens B. Jorgensen > > [EMAIL PROTECTED] > > Would anybody like give some input on developing this? I was thinking about > using ifconfig in a script to temporarily configure the networks so that it > might "feel" for a network pulse over the ether net. If no pulse is felt > then it will start daild, otherwise it would start dhcpcd, then make a script > called net-switch that would > allow you to stop dhcpcd and start daild on the fly or vice-verse. The > problem with accomplishing the net selection with DHCP is that the boot > script will just hang if it can't find an address, and I have never been > patient enough to wait for it to time out(if it does at all). I asked if > anyone had done it because I did not want > to go around re-inventing the wheel. Tell me what you all think. > Regards, > haggs -- Jens B. Jorgensen [EMAIL PROTECTED]
