This code based on netfilter.org
You should place this repo on path/to/libnetfilter_queue-1.0.3/here
Build
gcc -o nfqnl_test nfqnl_test.c -lnetfilter_queue
Usage
netfilter-test
Iptables
sudo iptables -F
sudo iptables -A OUTPUT -p tcp -j NFQUEUE
sudo iptables -A INPUT -p tcp -j NFQUEUE