tinstructor

Renamed get and remove tsch link functions

3

@atiselsts Since there is a legitimate use for a function that checks whether a link exists based solely on slot offset (a.k.a., "timeslot"), it would be better to rename the...

Problem with RPL option processing on downward rank error

2

I've noticed that when a node is the endpoint of a downward moving packet in RPL storing mode (RPL-classic) but said node detects a Rank error, it [processes](https://github.com/contiki-ng/contiki-ng/blob/999b0d85f28c8f70b843542e216d6d62084e8563/os/net/routing/rpl-classic/rpl-ext-header.c#L142-L163) the RPL...