Re: mmap/munmap bug

[Hayim Shaul]

> > 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?
>
> yes; netfilter has facilities for this actually afaik.
> tcpdump also uses something like this (but only in one direction), it
> mmaps some ringbuffer with incomming packets.

Are you refering to NF_QUEUE + libipq ?
I was under the impression that it does involve memcpy.

Also, I think that with this you cannot change routing decisions made on 
the packet, although, I'm not sure yet how critical this is for me.
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