Re: [lwip-users] protect from overflow of received data

[Simon Goldschmidt]

address@hidden wrote:
> I have the following problem and question:
> I use LWIP with an arm microcontroller and the application has an active 
> TCP connection.
> Now the question is how can I protect from an overflow of received data?

The only option you have is to not update the window (i.e. don't call 
tcp_recved until you have more buffer space available). However, this means 
that you have to be prepared to buffer a full tcp window (by not freeing the 
pbufs passed to your recv callback function until you processed them - and not 
calling tcp_recved). Everything else you need regarding flow control has to be 
implemented in your application protocol, i.e. on top of tcp.

Simon
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