Roberto Romo <[email protected]> wrote: > I founded an example for a TCP-echo-client from st I think. When I compile > it and run it on my µc everything is ok, > but when i capture the communication with wireshark I see that the µc > (IP: 192.168.1.5) sends an error: > > - Header checksum: 0x0000 [incorrect, should be 0x0d6f (maybe caused by > "IP checksum offload"?)
Is that so? Because from the image you attached, a packet from 192.168.1.4 *to* 192.168.1.5 has a zero checksum. No I assume that .4 is your PC which has checksum offloading enabled. In that case, it's perfectly normal to see checksum errors: wireshark gets the outgoing packets before the driver (or even hardware) has filled in the checksums. However, communication should still work fine although wireshark reports an error. As a workaround, either disable checksum checks in the wireshark options or disable checksum offloading in your windows NIC's options. Simon -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
