Messages in this thread | | | Date | Tue, 22 Mar 2005 11:44:20 +0200 (IST) | From | Hayim Shaul <> | Subject | Re: mmap/munmap bug |
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>> >> 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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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