nfq 0.2.0

Rust library for dealing with NetFilter queue
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nfq - NetFilter queue for Rust

nfq is Rust library for performing userspace handling of packets queued by the kernel packet packet filter chains.

License

In contrast to libnetfilter_queue which is licensed under GPL 2.0, which will require all binaries using that library to be bound by GPL, nfq is dual-licensed under MIT/Apache-2.0. To achieve this, nfq does not use libnetfilter_queue. Instead, nfq communicates using libmnl directly, which is licensed under LGPL.

Example

Here is an example which accepts all packets.

use nfq::{Queue, Verdict};

fn main() -> std::io::Result<()> {
   let mut queue = Queue::open()?; 
   queue.bind(0)?;
   loop {
       let msg = queue.recv()?;
       queue.verdict(msg, Verdict::Accept)?;
   }
   Ok(())
}