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OSPF: Fix net-summary origination combined with stubnet option

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Stubnet nodes in OSPF FIB were removed during rt_sync(), but the pointer
remained in top_hash_entry.nf, so net-summary LSA origination was
confused, reported 'LSA ID collision' and net-summary LSAs were not
originated properly.

Thanks to Naveen Chowdary Yerramneni for bugreport and analysis.
This commit is contained in:
Ondrej Zajicek (work) 2016-12-13 17:34:42 +01:00
parent ed1a908e53
commit 9e7d3a7810
2 changed files with 11 additions and 7 deletions
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17
proto/ospf/rt.c
View file

@ -429,10 +429,9 @@ add_network(struct ospf_area *oa, ip_addr px, int pxlen, int metric, struct top_
if (en == oa->rt)
{
/*
* Local stub networks does not have proper iface in en->nhi
* (because they all have common top_hash_entry en).
* We have to find iface responsible for that stub network.
* Configured stubnets does not have any iface. They will
* Local stub networks do not have proper iface in en->nhi (because they all
* have common top_hash_entry en). We have to find iface responsible for
* that stub network. Configured stubnets do not have any iface. They will
* be removed in rt_sync().
*/
@ -1560,6 +1559,7 @@ ospf_rt_reset(struct ospf_proto *p)
{
ri = (ort *) nftmp;
ri->area_net = 0;
ri->keep = 0;
reset_ri(ri);
}
FIB_WALK_END;
@ -1929,9 +1929,12 @@ again1:
}
}
/* Remove configured stubnets */
if (!nf->n.nhs)
/* Remove configured stubnets but keep the entries */
if (nf->n.type && !nf->n.nhs)
{
reset_ri(nf);
nf->keep = 1;
}
if (nf->n.type) /* Add the route */
{
@ -1991,7 +1994,7 @@ again1:
}
/* Remove unused rt entry, some special entries are persistent */
if (!nf->n.type && !nf->external_rte && !nf->area_net)
if (!nf->n.type && !nf->external_rte && !nf->area_net && !nf->keep)
{
FIB_ITERATE_PUT(&fit, nftmp);
fib_delete(fib, nftmp);

1
proto/ospf/rt.h
View file

@ -84,6 +84,7 @@ typedef struct ort
rta *old_rta;
u8 external_rte;
u8 area_net;
u8 keep;
}
ort;