having trouble getting the echo client to work using TCP/uIP on K64F

Rohit Grover

Hello Community,

I've still not been able to get a TCP stream going over uIP using the echo-client sample.
I've unearthed problems along the way (including data-integrity issues in Zephyr's port of uIP; refer to https://gerrit.zephyrproject.org/r/#/c/4226/ ) which suggest that this kind of thing isn't actively tested. With my recent changes, I manage to get the first packet bounce back successfully to the echo-client. Successive packets aren't getting processed on their way out from the client.

I find that uip_process() isn't getting called on successive packets. It gets called for the first packet due to some retransmission timer. The recently made change to eventhandler() in tcpip.c (https://gerrit.zephyrproject.org/r/#/c/4050/) makes things worse because the code meant to refresh certain periodic timers gets skipped.

These issues seem to arise from uIP. I would appreciate some help from people who ported uIP to zephyr. I believe the problems will surface if someone tries a TCP/IPV4 stream.

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