On Tue, 2005-03-22 at 10:23 +0200, Hayim Shaul wrote: > >> 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?
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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
