[riot-notifications] [RIOT-OS/RIOT] gnrc_netif: use link-local source address if destination is link-local (#16665)

Martine Lenders notifications at github.com
Wed Jul 21 11:26:06 CEST 2021

The source address selection is quite involved https://datatracker.ietf.org/doc/html/rfc6724, but from what I remember, rule 2 should make sure that if a link-local address is present the appropriate scope will be selected. So I'd rather not touch that by enforcing it. E.g. what if, for whatever reason, the interface does not have a link-local address, then with this change the source address selection will always fail. So there must be another reason why a global address is picked in your case. Usually, a link-local address should be picked.

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