On Wed, 6 Jan 2021 13:32:05 +0100 Marek Behún <ka...@kernel.org> wrote:
> On Wed, 6 Jan 2021 12:56:08 +0100 > Marek Behún <ka...@kernel.org> wrote: > > > I also to write a simple NAT masquerading program. I think XDP can > > increase NAT throughput to 2.5gbps as well. > > BTW currently if XDP modifies the packet, it has to modify the > checksums accordingly. There is a helper for that even, bpf_csum_diff. (from L3 forwards, if you modify ethhdr, you don't have to modify L2 checksum. You can't even see it...)
