Jan Engelhardt skrev:
On Thursday 2009-03-26 11:26, Kristian Evensen wrote:
Turned out that it was the checksums. They were calculated correctly,
but since I processed packets on input, tcp_hdr and udp_hdr of course
returned invalid pointers. My code is now more or less RAWNAT, so if
it is of interest to anybody else I will merge them and make it
available.
I have now rebased the RAWNAT branch to Xt-a's master and
made the rawpost tables workable with all kernel versions.
It does not have MAC addr punning yet.
Great, but I think I see a small bug (I left my Linux-machine at work so
I am not able to try it out). If you use RAWDNAT in prerouting, tcp_hdr
and udp_hdr will return the wrong values since the corresponsing values
in the SKB are not set yet. At least, that is what I experienced in my
own module. Please let me know if I am wrong :)
Would a better solution by to use conntrack to determine the direction,
check the name of the chain (is that possible?) or just simply ip_hdr +
1? :)
-Kristian
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