Re: mmap/munmap bug

[Hayim Shaul]

> > 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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