Re: AW: [lwip-users] Problem of tcp_write with more then about 20 kBytes

[Kieran Mansley]

On Mon, 2010-08-02 at 15:39 +0200, Daniel Klingler wrote:
> Hi,
> 
> I increased MEMP_N_PBUF to 32, and it is running well. (TCP_SND_QUEUELEN
> seems to be fixed.)

Note that while this has avoided the problem it isn't entirely solved.
lwIP will still refuse your writes if you make them big enough, or if
there is already enough stuff enqueued.  You need to cope with this in
your application and either try again later, try a smaller write, or
something similar.

Kieran