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

benpicco notifications at github.com
Wed Jul 21 11:10:56 CEST 2021


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### Contribution description

So while debugging some strange behavior in GNRC I noticed that sometimes a packet would be send to a link-local address with a global address as the source if the source address is left unspecified.

Is this the intended behavior? From my naive understanding I would expect to only use link-local addresses when targeting another on-link host, but I might be wrong. 

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You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/16665

-- Commit Summary --

  * gnrc_netif: use link-local source address if destination is link-local

-- File Changes --

    M sys/net/gnrc/netif/gnrc_netif.c (4)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/16665.patch
https://github.com/RIOT-OS/RIOT/pull/16665.diff

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