Hi Stephen, On Mon, Oct 12, 2015 at 02:51:14PM -0500, Stephen Cowell wrote: > > I find that I sometimes get an infinite loop when stepping to > pcb->next...
I didn't have to read further. As usual, it looks like a broken port or usage which violate lwIP threading model. Summary: - Do *NOT* call anything in interrupt context, nothing, never, absolutely never, use your OS semaphore signaling to an Ethernet/serial/… RX thread - memp_*, pbuf_*, functions are thread-safe if SYS_LIGHTWEIGHT_PROT is set, and again, thread safe does not mean it is interrupt safe - Do *NOT* call any function from the RAW API outside lwIP thread - Use Netconn or Socket API in others threads, but keep in mind you should not share a Netconn/Socket control block between threads, (or use proper locking if you really have to, of course). - Please read doc/rawapi.txt from the lwIP source which explain that more comprehensively Sylvain
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