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ripd: fix interface wakeup after shutdown
RIP schedules a call to `rip_interface_wakeup` in 1 second after receiving the interface UP event from zebra. The function is called even if the interface was shut down during this interval. This is incorrect and also leads to a crash in the following scenario: ``` vtysh -c "conf" -c "router rip vrf red" -c "network enp2s0" ip link add red type vrf table 1 ip link set enp2s0 vrf red ip link set enp2s0 down ip link set enp2s0 up && ip link del red ``` Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
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@ -493,6 +493,9 @@ int rip_if_down(struct interface *ifp)
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struct listnode *listnode = NULL, *nextnode = NULL;
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ri = ifp->info;
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THREAD_OFF(ri->t_wakeup);
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rip = ri->rip;
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if (rip) {
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for (rp = route_top(rip->table); rp; rp = route_next(rp))
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