Re: [lwip-users] Incoming packet bigger than PBUF_POOL_BUFSIZE

[Simon Goldschmidt]

Kieran Mansley <address@hidden> wrote:

> Note that you should also handle chains of pbufs on the send path in your 
> driver.  With a relatively small PBUF_POOL_BUFSIZE lwIP can pass packets for 
> transmission to the driver as a chain as well.

Just a tiny correction here: PBUF_POOL pbufs are normally not used for 
transmission. As such, the existence of pbuf chains in the TX path does not 
depend on the value of PBUF_POOL_BUFSIZE. Pbuf chains can always be sent to 
your netif driver as it is the application's responsibility (keeping TCP aside) 
to form a single pbuf.

Simon