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-rw-r--r--proto/ospf/rt.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index a230d38..2e1de44 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -776,6 +776,8 @@ add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
node *prev, *n;
int added = 0;
struct top_hash_entry *act;
+ ip_addr old_nh;
+ struct ospf_iface *old_nhi;
if (en == NULL)
return;
@@ -798,13 +800,20 @@ add_cand(list * l, struct top_hash_entry *en, struct top_hash_entry *par,
DBG(" Adding candidate: rt: %R, id: %R, type: %u\n",
en->lsa.rt, en->lsa.id, en->lsa.type);
+ old_nhi = en->nhi;
+ old_nh = en->nh;
+
en->nhi = NULL;
en->nh = IPA_NONE;
-
calc_next_hop(en, par, oa);
if (!en->nhi)
- return; /* We cannot find next hop, ignore it */
+ {
+ /* No next hop found, we undo changes and return */
+ en->nhi = old_nhi;
+ en->nh = old_nh;
+ return;
+ }
if (en->color == CANDIDATE)
{ /* We found a shorter path */