[riot-notifications] [RIOT-OS/RIOT] gnrc/ipv6_auto_subnets: relax topology requirements (#16750)

benpicco notifications at github.com
Mon Sep 6 19:40:56 CEST 2021

@benpicco commented on this pull request.

> +static uint8_t l2addrs[CONFIG_GNRC_IPV6_AUTO_SUBNETS_PEERS_MAX]
+                      [CONFIG_GNRC_IPV6_NIB_L2ADDR_MAX_LEN];

We could get rid of this array by instead adding a flag to the entries in the NIB. This would however require to mess with nib internals that are not accessible through the public API, so I decided to rather keep a local collection of neighboring routers l2 addressees here. 

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