[lwip-users] Test offloading checksum for receive path

[Giuseppe Modugno]

LPC546xx MCUs have the capability to offload checksum for IP, TCP, UDP 
and ICMP, for outgoing and ingoing packets.

I enabled the generation of checksum for IPv4 for outgoing packets and 
it seems working well. Now I want to enable and test checksum offload 
for incoming IPv4 datagrams, but I'm in trouble how to test.

I should have the possibility to generate and send an IP datagram with a 
wrong checksum from a host on the same LAN of lwip device.

Do you know of any tool that can do this kind of thing on Windows?