path: root/utils/nfbpf_compile.c
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* utils: nfbpf_compileWillem de Bruijn2013-04-021-0/+55
A BPF compiler to convert tcpdump expressions to the decimal format accepted by the libxt_bpf. Generate a file and pass that to iptables: nfbpf_compile RAW 'udp dst port 9000' > test.bpf iptables -A OUTPUT -m bpf --bytecode-file test.bpf -j LOG Or pass the output directly to iptables using backticks: iptables -A INPUT -m bpf --bytecode \ "`./nfbpf_compile RAW 'udp dst port 9000'" -j LOG This utility depends on libpcap. The library is only compiled if the option --enable-bpf-compiler is explicitly passed to ./configure and libpcap is found. Pablo has mangled the original patch to rename the utility to nfbpf_compile. Also modified the output to match exactly what -m bpf --bytecode needs. Signed-off-by: Willem de Bruijn <> Signed-off-by: Pablo Neira Ayuso <>