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

[Bernhard 'Gustl' Bauer]

address@hidden schrieb:
> Bernhard 'Gustl' Bauer wrote:
> First of all, only to make sure what you mean, are you referring to the 
> PBUF_POOL running out of pbufs?

Yes

> > I'm not sure I understand the pbuf concept.
> You have to call pbuf_free() on every pbuf chain passed to your 
> application (via the receive callback). If can chain two chains together 
> using pbuf_cat(), you only have to call pbuf_free() on the head of the 
> chain.

This chained pbufs are new to me. I treated every call from tcp_recv as 
if it contained only 1 pbuf = packet.

> >   I have some data transfers
> > that exceed 1 tcp packet.
> >
> > Every time http_recv is called I check if this is the 1st packet. If it
> > is I set a pointer to this pbuf and do not free this pbuf. If it is not
> > the 1st packet I store the data and free this pbuf.
> >    
> What do you mean by 'store the data and free this pbuf'?

I copy the payload to a different location and call pbuf_free whit the 
pointer to pbuf.

Gustl