Re: [lwip-users] Data waiting but no recv()

[Jonathan Larmour]

Josh Rothstein wrote:
> What is the correct way to make sure that my stack does not lock up if I 
> am receiving unexpected data over a connection?  Should I just poll() 
> each time around the loop?  I cannot just place extra recv()s around the 
> loop or else my task will block if no data is waiting.

Theoretically, you can do it in a different task, use select() to wait for 
multiple sockets when you would be blocked waiting for input anyway and/or 
use non-blocking sockets if you were going to be doing a busy poll anyway.

But the more efficient choice is to enable the LWIP_SO_RCVBUF option in 
lwipopts.h and use setsockopt() to set it.

Jifl
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