[riot-notifications] [RIOT-OS/RIOT] tests/gnrc_tcp_*: #2 not working on 6Lo-based boards (#10956)

Martine Lenders notifications at github.com
Wed Feb 6 11:18:53 CET 2019


I had a quick look at the stack and the `gnrc_netif_hdr_build()` is there. Here

https://github.com/RIOT-OS/RIOT/blob/3e5658d40739dfa8e482bb3ed1ee595fd656fa96/sys/net/gnrc/transport_layer/tcp/gnrc_tcp_pkt.c#L114-L135

and here

https://github.com/RIOT-OS/RIOT/blob/3e5658d40739dfa8e482bb3ed1ee595fd656fa96/sys/net/gnrc/transport_layer/tcp/gnrc_tcp_pkt.c#L223-L236

For the first case, I'm not quite sure why it is only build when the source is link-local. To me it seems sensible to always use the information available (i.e. if a netif header is there, use it), but since we are only using link-local addresses and that case is only for constructing reset replies, this can't be the problem I believe.

For the second case it can only be, that `tcb->ll_iface` might not be set or set to a wrong value.


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