Jan Engelhardt skrev:
On Wednesday 2009-03-25 20:47, Kristian Evensen wrote:
However, I have noticed a similar problem when using my module on incoming
packets in PREROUTING (on the multihomed receiver), the IP adress is changed
(accoring to my dmesg-output) but then they are not heard from again.
Probably dropped due to L3 or L4 checksum mismatches. While we try to
change the checksum, I have not verified it for all cases.
Hm, I am noe sure. I recalculate the checksum (using csum_replace4 for
l3 and inet....replace4 for l4) after modifying the destination IP, and
when used with OUTPUT the checksum is correct. Since tcpdump/Wireshark
outputs the packets before they are modified I haven't been able to
verify this though.
-Kristian
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
