[Click] Cleanup notification

[Eddie Kohler]

Hi Beyers,

How is the router being shut down?  If it's being shut down by 
"/click/stop" or similar, then you can use DriverManager like so:

    DriverManager(wait_stop /* wait for write to /click/stop */,
           write vrrp.send_shutdown /* call write handler */,
           wait 0.5s /* wait for packet to make its way through router 
*/,
           stop)

But this would not work for writing directly to /click/config.

Would this be good enough?  I'm not sure about a separate "pre-cleanup" 
stage, because how would one tell when it had completed?  If 
pre-cleanup went on forever, what would you do?  Etc.

Eddie


On Feb 23, 2005, at 6:48 PM, Beyers Cronje wrote:

> Hi,
>
> Is there a cleanup stage an element can hook into just before standard 
> cleanup, but while packet processing is still running ?
>
> My intent is to let an element, ie a VRRP element send a 
> shutdown/disconnet packet to its peers just before the router shuts 
> down. My current attempt at using standard cleanup(CleanupStage) to do 
> this fails, I presume once the router fires cleanup stage packet 
> processing has already stopped?
>
> Can this be done ? Or should I rely on keepalive packets with timeouts 
> ?
>
> Regards
>
> Beyers
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