netdev - Re: Netlink, route monitoring, RTM_DELROUTE not issued for ppp peer address. Bug or feature?

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Date:	Mon, 16 Apr 2012 12:29:48 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	denys@...p.net.lb, stian@...ia.no, eric.dumazet@...il.com,
	stephen.hemminger@...tta.com, netdev@...r.kernel.org
Subject: Re: Netlink, route monitoring, RTM_DELROUTE not issued for ppp peer
 address. Bug or feature?

On Mon, 16 Apr 2012 14:40:05 -0400 (EDT)
David Miller <davem@...emloft.net> wrote:

> From: Denys Fedoryshchenko <denys@...p.net.lb>
> Date: Mon, 16 Apr 2012 13:37:14 +0300
> 
> > So the only solution is to fetch first, then keep full routing table
> > in userspace also, and keep tracking if local addresses deleted, and
> > do the same in userspace and check for prefsrc...
> 
> You don't need to keep full routing table in userspace, don't be
> silly.

Quagga does (in multiple daemons) and uses this to manage
route distribution and recursive routes.

> You only need to watch for the device down event, and purge in
> userspace based upon that key.

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