Milon Papezik writes: > I would like to extend ng_one2many module to include > automatic link failure datection, failover and FEC functionality. > > My question is: > Are interface nodes able to send upstream notification > that their state has changed or do I have to poll their status periodically > as it is done in ng_fec module made kindly available by wpaul ?
They don't now, but I think you could add this in a reasonably unoffensive way. What you would do is add a new function pointer to struct ifnet, say "void (*if_report)(struct ifnet *, int status)" or something. When a device driver detected link going up/down, it could call this function (if non-NULL). Then if_ethersubr() would set this function pointer to point to some function if_ether_report(). When if_ether_report() is called, if ng_ether was loaded, it would call into ng_ether() to generate a control message that would be passed to the node connected to the "lower" hook. Then, ng_one2many could be modified to understand this control message and do the right thing according to its configuration. Or, something like that. Polling might be a quicker and easier though less precise way to do it for starters. -Archie __________________________________________________________________________ Archie Cobbs * Packet Design * http://www.packetdesign.com To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
