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authorOndrej Zajicek (work) <santiago@crfreenet.org>2019-02-05 19:00:43 +0100
committerOndrej Zajicek (work) <santiago@crfreenet.org>2019-02-05 19:00:43 +0100
commit6e8fb66859a17b295cd9246264221a75cdbe6c55 (patch)
treea664f3e938c927355a44ccccd0ff4da0d50b166c /proto/ospf
parent52fdd1cb76be1e278799001fa57f56888062dd86 (diff)
Nest: Improve export counter handling
One of previous workarounds for phantom route avoidance breaks export counters by expanding sending of spurious withdraws, which are send when we are not sure whether we have advertised that routes in the past. If not, then export counter is decreased, but it was not increased before, so it overflows under zero. The patch fixes that by sendung spurious withdraws, but not counting them on export counter. That may lead to error in the other direction, but that happens only as a race condition (i.e., in normal operation filters return proper values about old route export state).
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