Hi,
My program is using ip_queue to develop in RHEL4.6.
Recently, I need to port my program to RHEL5.2 because the
stability issue of the system and my program in RHEL4.6.
I found that the ip_queue is replaced by netfilter_queue
in RHEL5.2 now and netfilter_queue provides the backward
compatibility of ip_queue. As a result, I try to
re-compile my program without changing the source code (My
program is still using the ip_queue) and I found that it
can be compiled successfully in RHEL5.2.
However, I found that my program cannot retrieve the
packets from the kernelspace into the userspace after it
is initialized as usual (Set the rules in iptables,
modprobe ip_queue - I think in RHEL5.2 is not needed to
modprobe ip_queue, but RHEL4.6 is needed).
The following is my questions. Why my program cannot
retrieve the packets? Is it the configuration problem of
the rules in iptables? Or some steps is forgotten to
perform? Or netfilter_queue cannot be backward compatible
to the ip_queue?
The platform which I compiled and executed my program is
RHEL5.2 (2.6.18-92.el5) with the installation of
libnfnetlink-0.0.39 and libnetfilter_queue-0.0.16. The
rules in iptables is listed in the below (It is the same
in RHEL4.6 and RHEL5.2):
iptables -t mangle -A PREROUTING -i eth0 -p udp -d
192.168.0.0/24 -m multiport --destination-port
2123,2152,3386 -j QUEUE
Thank you very much!
Regards,
Jacky Luk
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