Does it support zero copy not only for send but also for receive? Can we receive packets directly to userspace buffers?
that it can't currently, but without some major protocol stack rework that's not going to be easy. If you want to help do that work, excellent! Be sure to contact the people on net-dev mailinglist since they are the ones having looked at this previously.
My case is simpler, as the application I attend it to is similar to a NAT. A packet comes in, a little alternation of the headers and off it goes again. So there's no TCP-stack or anything.
What I thought of doing, is map the skbuff to user-space. Have the user-application alter the headers. Send the (same) skbuff from kernel-space.
Does there exist anything equivalent?
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