Re: [lwip-users] RAW Api to receive large image data

[Sergio R. Caprile]

Hi nkumar,
on reception, you won't ALWAYS receive a single pbuf, but probably a
chained pbuf.
This means, you have to ALWAYS look for p->tot_len, not just p->len, to
actually get ALL the data you were sent.
To extract ALL data in a pbuf chain, use pbuf_copy_partial(), it is
easier than travelling the pbuf chains: pbuf_copy_partial(p, towhere,
p->tot_len, 0);
To ACK all the data: tcp_recved(tpcp, p->tot_len);
Regards