You have to correctly set your checksum options according to your
hardware checksum capabilities.
Setting all 1 or all 0 is not correct per se.
Ethernet hardware is also capable of generating IP checksums, TCP
checksums, UDP checksums, all of them, some of them, none of them.
Check your
This question helped me check into the same issue I was having. Turns out
there's an option to turn on checksums in your lwipopts.h. Under checksum
options you should turn on CHECKSUM_GEN_ICMP. Also, in lwip/opt.h there is a
define LWIP_CHECKSUM_CTRL_PER_NETIF. This must be set to 1 along with all
Hello all,
I am trying to implement the ping software found in Contrib but I am having
issues. I have successfully gotten the code to compile and while stepping
through line by line it seems like everything is working correctly. The problem
is that the computer I am trying to ping never
