Re: Incremental update of TCP Checksum

Jamie Lokier
2003-09-17T20:35:05Z

Richard B. Johnson wrote:
> This is all wonderful. This assumes that the stuff being modified
> in the packet is on well-defined boundaries, seldom the case when
> you are re-writing packet data, but certainly the case if you
> are re-writing an IP address.

The only important boundary consideration is whether you're modifying
at an odd or even byte offset into the packet.

-- Jamie