[lwip-users] Failing ASSERTs with PCBs in wrong states

[Scott Miller]

I'm running lwIP on a Cortex-M33 with a Wiznet W5500 in MACRAW mode 
connected via SPI, with a netif port that's a little suspect - I've 
fixed a couple of bugs in it so far, but I'm not sure that's where the 
problem is.

What's happening is that during periods of rapid TCP activity (browser 
connecting to make HTTP requests mostly) it'll crash with an assert 
failure - either a PCB on the tw list is not in TIME_WAIT status 
(SYN_RCVD in the last case I saw) or a PCB on the active list will be in 
TIME_WAIT state.

How does this happen? I can't find any other instances online of anyone 
mentioning those errors. I'm using the raw API, no sockets or Netconns.

Thanks,

Scott