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

[Bob Brusa]

Am 18.01.2010, 12:11 Uhr, schrieb Bernhard 'Gustl' Bauer  
<address@hidden>:

> Hi,
>
> I'm using lwip 1.3.0 and sometimes I have a pbuf overflow.
>
> I'm not sure I understand the pbuf concept. 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.
>
> Then I check if this is the last packet. If it is I process all data and  
>   then free the pbuf of the 1st packet.
>
> When there is an tcp_err during a transfer I do free the 1st packet to.
>
> Is there anything wrong with this?
>
> TIA
>
> Gustl

Gustl, what if you miss these last buffers sometimes? I would change the  
logic:
If you get a first buffer check if you have some old stuff around and  
clean up.
Regards Bob