Date: Thu, 29 May 2008 23:16:25 +0530 From: "stephen leroy" <steveleroy123@gmail.com> To: freebsd-net@freebsd.org Subject: FreeBSD 5.4: routetbl leak for a static route if the interface address is removed Message-ID: <a013a1d30805291046r37621c3frca2e55bc88b547e0@mail.gmail.com>
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Hi. I am using FreeBSD 5.4. with a ethernet interface configured with an IP address. I have installed a static route with a gateway that lies on that interface's subnet. So I now effectively have 3 routes on that interface, the interface's subnet route, the static route, and an ARP entry for the gateway. When I delete the IP address on that interface, I expect all the 3 routes to be removed and routetbl count to go down correspondingly. However, it gets decremented by 1, accounting only for the interface's subnet route, and not for the static route and the arp. I found that in in_ifadownkill() which is invoked on deletion of the IP address, there's a call to rtexpunge(), which frees up the references to the rtentry, but does not actually call an rtfree. I would like to know who will free the rtentry for the route cleaned up by rtexpunge. - Steve
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