ndp: Store link-local or global address on any NDP message received

The guest might not send other types of traffic before we try to
communicate to it, so take also this chance to store its configured
addresses.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/ndp.c b/ndp.c
index 8f69a64..acc0473 100644
--- a/ndp.c
+++ b/ndp.c
@@ -162,6 +162,11 @@ int ndp(struct ctx *c, struct ethhdr *eh, size_t len)
 
 	len = (uintptr_t)p - (uintptr_t)ihr - sizeof(*ihr);
 
+	if (IN6_IS_ADDR_LINKLOCAL(&ip6h->saddr))
+		c->addr6_ll_seen = ip6h->saddr;
+	else
+		c->addr6_seen = ip6h->saddr;
+
 	ip6hr->daddr = ip6h->saddr;
 	ip6hr->saddr = c->gw6;
 	ip6hr->payload_len = htons(sizeof(*ihr) + len);