On 7/03/2014, at 2:15 PM, Richard Procter wrote: > > I've some ideas about solutions [for modifying checksums more cleanly] but > will > leave those for another email.
Shifting this old thread to tech@: I've posted a patch that re-instates the pf algorithm of OpenBSD 5.4 for preserving payload checksums end-to-end but rewritten without the ugly and error-prone (but speedy!) code and aiming to have no significant impact on performance. best, Richard.
