[lwip-users] pbuf_header fails in etharp_output

[Matthias Weisser]

Hi

The ping problem I had yesterday disappears when I use a Linux system to ping 
my target. Now the ICMP packet from Linux arrives inside the lwIP stack and a 
valid reply message is created. This message is then passed to etharp_output 
which tries to make room for the ethernet header with the pbuf_header function. 
But this wont work. This

if ((u8_t *)p->payload < (u8_t *)p + sizeof(struct pbuf))

is true and therefor the function fails. I don't have any idea how to fix this. 
Maybe its quite a simple problem (missing define?). 


Regards,
Matthias