On 16-04-09 07:29 AM, Tom Herbert wrote:

+1. Forwarding which will be a common application almost always
requires modification (decrement TTL), and header data split has
always been a weak feature since the device has to have some arbitrary
rules about what headers needs to be split out (either implements
protocol specific parsing or some fixed length).

Then this is sensible. I was cruising the threads and
confused by your earlier emails Tom because you talked
about XPS etc. It sounded like the idea evolved into putting
the whole freaking stack on bpf.
If this is _forwarding only_ it maybe useful to look at
Alexey's old code in particular the DMA bits;
he built his own lookup algorithm but sounds like bpf is
a much better fit today.

cheers,
jamal

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