>>>>> 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. >>> 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. -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
