Re: [lwip-users] http server and pbuf overflow

[Bernhard 'Gustl' Bauer]

Simon Goldschmidt schrieb:
> How do you know you have a leak, anyway? Does your device stall? Or
> is it only temporary? Maybe you just configured the number of pbufs
> too low?

I let it run some time. then I close all browser windows and have a look 
at the stats. pbuf.used doesn't drop to 0! If I let it run some time 
used increases to avail.

> > Don't I get a tcp_err in this case? This would free pbuf.
>
> That depends on the remote side. If you simply switch off the remote
> side or unplug its cable, you won't get a tcp_err (or not for some
> time, at least): tcp_err is called when the remote side sends a RST
> or your connection times out (and timing out can be a long time for
> TCP if the remote side simply doesn't answer at all).

Good to know.

Gustl