Marc Lehmann wrote:
Hello,
that worked for me.
But i've got another question concerning the uip_datalen() function.
In my UIP_APPCALL function I try to check how much data has arrived with
the latest packet. I tried the uip_datalen() function, but it says 0 no
matter what kind of packet arrived.
Strange! uip_datalen() (which is #defined to be the uip_len variable) is
supposed to be used for exactly that purpose.
I already checked your uip_process() function, but i cannot see where you
set uip_len to the data size. The only thing i saw is, that you reset the
length variables to 0.
uip_len is set to the size of the incoming packet (including headers) in
the device driver. The uip_process() function later sets uip_len to the
size of the incoming TCP data on lines 857 and 858 in uip.c:
if((BUF->len[0] << 8) + BUF->len[1] <= uip_len) {
uip_len = (BUF->len[0] << 8) + BUF->len[1];
Am I doing anything wrong?
Does your device driver correctly set uip_len?
Regards,
/adam
Thanks in advance
Marc
You can use a union, something like this:
typedef union {
struct app1_state a1;
struct app2_state a2;
struct app3_state a3;
} uip_tcp_appstate_t;
and access the state structures through appstate->a1.var1; and so forth.
This way no extra memory is required.
Hope this helps,
/adam
--
Adam Dunkels, Swedish Institute of Computer Science
http://www.sics.se/~adam/
