Hello all,
I'm writing an application which forwards incoming packets
depending on the applications current view of the network. All
packets are sent to userpace with NF_QUEUE (this was suggested to
me by this list and its working great for single hops, thanks :-)).
So iphdr->daddr is either changed to
1) The address of the next hop
2) or a broadcast address
Having changed iphdr->daddr I recalculate iphdr->check,
and call ipq_set_verdict,
But for some reason the packet seems to be dropped,
It doesn't appear at the NF_POST_ROUTING hook
[192.168.225.3] pings 192.168.225.2,
iphdr->daddr is set to a broadcast address at
NF_IP_LOCAL_OUT
[192.168.225.1] packet arrives at NF_IP_PRE_ROUTING
iphdr->daddr is set to 192.168.225.2
Packet disappears
I've changed the /proc/sys/net/ipv4/ip_forward entry to 1
So I was wondering if any you have tried this before or
have any suggestions for a solution.
Thanks very much for your help,
Kevin
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