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

Simon Brummer notifications at github.com
Wed Feb 6 16:07:34 CET 2019


> @brummer-simon check [this pcap](https://owncloud.inet.haw-hamburg.de/index.php/s/ZWVbzFB4NE7KIel). As you can see, handshake seems somewhat ok but then weird stuff happens. However, I'd prefer **not** to analyze remotely and maybe wait for the next Hack'n'ACK.

That would play into the fragmentation theory. The handshake has no payload.

@martine - I have some vague memory that the TCP inspection view was somewhat broken when I comes to using TCP over 6LoPAN. This was few years back but it could is still not fixed.

@PeterKietzmann - To be really sure if this is fragmentation on 6LoPAN or really entire TCP Packets, you could add a debug print in "sys/net/gnrc/transport_layer/tcp/gnrc_tcp_eventloop.c".
Every Packet entering and leaving the TCB comes through there including retransmits. Could you check that for me?

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