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OSPF: Fixes handling of external routes with immediate gw

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The bug caused that received external LSAs with locally reachable
next hops were ignored. I wonder why nobody noticed it sooner.
This commit is contained in:
Ondrej Zajicek 2015-04-18 13:22:41 +02:00
parent 304ac2e861
commit ef3cac669c
1 changed files with 5 additions and 0 deletions
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5
proto/ospf/rt.c
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@ -95,6 +95,8 @@ merge_nexthops(struct ospf_proto *p, struct mpnh *s1, struct mpnh *s2, int r1, i
struct mpnh **n = &root;
int count = p->ecmp;
ASSERT(p->ecmp);
/*
* r1, r2 signalize whether we can reuse nexthops from s1, s2.
* New nexthops (s2, new) can be reused if they are not inherited
@ -153,6 +155,9 @@ fix_device_nexthops(struct ospf_proto *p, const struct mpnh *n, ip_addr gw)
struct mpnh **nn1 = &root1;
struct mpnh **nn2 = &root2;
if (!p->ecmp)
return new_nexthop(p, gw, n->iface, n->weight);
/* This is a bit tricky. We cannot just copy the list and update n->gw,
because the list should stay sorted, so we create two lists, one with new
gateways and one with old ones, and then merge them. */