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RIOT/sys/net/gnrc/network_layer
Benjamin Valentin 11e9b7c08f gnrc_ipv6_nib: only consider NC in gnrc_ipv6_nib_get_next_hop_l2addr()
Consider the following: A node tries to forward a packet to another
host for which it does not know the route yet. It assumes it to be
on-link and starts a neighbor solicitation, putting the node address
in the destinatio cache.

Later the route is known (via a second hop) but the host is still in
the NIB.

The result is that gnrc_ipv6_nib_get_next_hop_l2addr() ends up in the
"nib: %s is in NC or on-link, start address resolution" case and does
not attempt to resolve the route.

This results in the host remaining unreachable even though now a route
is present.
2021-07-22 13:36:53 +02:00
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