Checksum Offload on the NIC(s) can complicate things. First, if you are tracing
on the sender, the tracepoint is before the NIC has computed the full checksum.
IIRC only a partial checksum is passed-down to the NIC when CKO is in use.
So, making certain your trace is from the "wire" or the re
e packet. After that I just change the destination
> address of the packet and insert it back into the ip stack. But after
> inserting the packet I am getting a bad TCP checksum error. Even I am
> getting the same error for IP header checksum. Attached is the source
> code and tcpdump o
Hi,
I wrote a program where I am using the nfnetlink and netfilter_queue
model to capture the packet. After that I just change the destination
address of the packet and insert it back into the ip stack. But after
inserting the packet I am getting a bad TCP checksum error. Even I am
getting the
