[OpenWrt-Devel] ethernet carrier, udhcpc, hotplug

2012-05-14 Thread Conor O'Gorman 
I don't seem to get udhcpc renewing a lease after plugging out/in the
ethernet cable.

I've checked that the carrier state is being signaled correctly via 'ip
link'. 

I imagined that either udhcpc directly, or hotplug indirectly, would
make the magic happen, ie. an attempted renewal.

Am I missing something? I would think this useful, as it may have been
plugged into a different network.

Thanks,
Conor

___
openwrt-devel mailing list
openwrt-devel@lists.openwrt.org
https://lists.openwrt.org/mailman/listinfo/openwrt-devel

Re: [OpenWrt-Devel] ethernet carrier, udhcpc, hotplug

2012-05-14 Thread Jo-Philipp Wich 
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

 Am I missing something? I would think this useful, as it may have
 been plugged into a different network.

Yes. This might work for units that have their wan at a dedicated
interface, but it will fail through bridges or switches which are
always up from the system pov.

~ Jow
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iEYEARECAAYFAk+xOVQACgkQdputYINPTPODWQCfWJ8SqvmsOIJmAyR0Qp1eoTWM
etEAniehrTsK2IsWljOFq6KIQAw0+vr3
=k7bX
-END PGP SIGNATURE-
___
openwrt-devel mailing list
openwrt-devel@lists.openwrt.org
https://lists.openwrt.org/mailman/listinfo/openwrt-devel

Re: [OpenWrt-Devel] ethernet carrier, udhcpc, hotplug

2012-05-14 Thread Conor O'Gorman 
On Mon, 2012-05-14 at 18:56 +0200, Jo-Philipp Wich wrote:
  Am I missing something? I would think this useful, as it may have
  been plugged into a different network.
 
 Yes. This might work for units that have their wan at a dedicated
 interface, but it will fail through bridges or switches which are
 always up from the system pov.

Yes, I understand. Bridges, I believe, do a suitable AND operation of
the carriers for encompassed ports. Switches are more difficult and
depend on driver behaviour. It would be appropriate for switch drivers
to also do a logical AND of relevant physical port's carriers.

But those are the details. I was enquiring about the basic principle in
the first instance. There is no current mechanism for dhcpc (or other)
activity on carrier down/up?

I saw a patch for uevent to handle interface carrier events, but it
doesn't seem to have stuck?

Thanks,
Conor

___
openwrt-devel mailing list
openwrt-devel@lists.openwrt.org
https://lists.openwrt.org/mailman/listinfo/openwrt-devel