Work on Linux platform code
This commit is contained in:
Mathias Hall-Andersen
432
src/wireguard/router/tests.rs
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432
src/wireguard/router/tests.rs
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@@ -0,0 +1,432 @@
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use std::net::IpAddr;
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use std::sync::atomic::Ordering;
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use std::sync::Arc;
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use std::sync::Mutex;
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use std::thread;
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use std::time::Duration;
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use num_cpus;
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use pnet::packet::ipv4::MutableIpv4Packet;
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use pnet::packet::ipv6::MutableIpv6Packet;
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use super::super::types::bind::*;
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use super::super::types::*;
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use super::{Callbacks, Device, SIZE_MESSAGE_PREFIX};
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extern crate test;
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const SIZE_KEEPALIVE: usize = 32;
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#[cfg(test)]
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mod tests {
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use super::*;
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use env_logger;
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use log::debug;
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use std::sync::atomic::AtomicUsize;
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use test::Bencher;
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// type for tracking events inside the router module
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struct Flags {
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send: Mutex<Vec<(usize, bool, bool)>>,
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recv: Mutex<Vec<(usize, bool, bool)>>,
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need_key: Mutex<Vec<()>>,
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key_confirmed: Mutex<Vec<()>>,
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}
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#[derive(Clone)]
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struct Opaque(Arc<Flags>);
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struct TestCallbacks();
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impl Opaque {
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fn new() -> Opaque {
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Opaque(Arc::new(Flags {
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send: Mutex::new(vec![]),
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recv: Mutex::new(vec![]),
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need_key: Mutex::new(vec![]),
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key_confirmed: Mutex::new(vec![]),
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}))
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}
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fn reset(&self) {
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self.0.send.lock().unwrap().clear();
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self.0.recv.lock().unwrap().clear();
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self.0.need_key.lock().unwrap().clear();
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self.0.key_confirmed.lock().unwrap().clear();
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}
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fn send(&self) -> Option<(usize, bool, bool)> {
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self.0.send.lock().unwrap().pop()
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}
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fn recv(&self) -> Option<(usize, bool, bool)> {
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self.0.recv.lock().unwrap().pop()
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}
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fn need_key(&self) -> Option<()> {
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self.0.need_key.lock().unwrap().pop()
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}
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fn key_confirmed(&self) -> Option<()> {
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self.0.key_confirmed.lock().unwrap().pop()
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}
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// has all events been accounted for by assertions?
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fn is_empty(&self) -> bool {
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let send = self.0.send.lock().unwrap();
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let recv = self.0.recv.lock().unwrap();
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let need_key = self.0.need_key.lock().unwrap();
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let key_confirmed = self.0.key_confirmed.lock().unwrap();
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send.is_empty() && recv.is_empty() && need_key.is_empty() & key_confirmed.is_empty()
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}
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}
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impl Callbacks for TestCallbacks {
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type Opaque = Opaque;
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fn send(t: &Self::Opaque, size: usize, data: bool, sent: bool) {
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t.0.send.lock().unwrap().push((size, data, sent))
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}
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fn recv(t: &Self::Opaque, size: usize, data: bool, sent: bool) {
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t.0.recv.lock().unwrap().push((size, data, sent))
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}
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fn need_key(t: &Self::Opaque) {
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t.0.need_key.lock().unwrap().push(());
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}
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fn key_confirmed(t: &Self::Opaque) {
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t.0.key_confirmed.lock().unwrap().push(());
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}
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}
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// wait for scheduling
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fn wait() {
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thread::sleep(Duration::from_millis(50));
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}
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fn init() {
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let _ = env_logger::builder().is_test(true).try_init();
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}
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fn make_packet(size: usize, ip: IpAddr) -> Vec<u8> {
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// create "IP packet"
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let mut msg = Vec::with_capacity(SIZE_MESSAGE_PREFIX + size + 16);
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msg.resize(SIZE_MESSAGE_PREFIX + size, 0);
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match ip {
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IpAddr::V4(ip) => {
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let mut packet = MutableIpv4Packet::new(&mut msg[SIZE_MESSAGE_PREFIX..]).unwrap();
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packet.set_destination(ip);
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packet.set_version(4);
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}
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IpAddr::V6(ip) => {
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let mut packet = MutableIpv6Packet::new(&mut msg[SIZE_MESSAGE_PREFIX..]).unwrap();
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packet.set_destination(ip);
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packet.set_version(6);
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}
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}
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msg
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}
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#[bench]
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fn bench_outbound(b: &mut Bencher) {
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struct BencherCallbacks {}
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impl Callbacks for BencherCallbacks {
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type Opaque = Arc<AtomicUsize>;
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fn send(t: &Self::Opaque, size: usize, _data: bool, _sent: bool) {
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t.fetch_add(size, Ordering::SeqCst);
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}
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fn recv(_: &Self::Opaque, _size: usize, _data: bool, _sent: bool) {}
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fn need_key(_: &Self::Opaque) {}
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fn key_confirmed(_: &Self::Opaque) {}
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}
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// create device
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let (_fake, _reader, tun_writer, _mtu) = dummy::TunTest::create(1500, false);
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let router: Device<_, BencherCallbacks, dummy::TunWriter, dummy::VoidBind> =
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Device::new(num_cpus::get(), tun_writer);
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// add new peer
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let opaque = Arc::new(AtomicUsize::new(0));
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let peer = router.new_peer(opaque.clone());
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peer.add_keypair(dummy::keypair(true));
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// add subnet to peer
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let (mask, len, ip) = ("192.168.1.0", 24, "192.168.1.20");
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let mask: IpAddr = mask.parse().unwrap();
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let ip1: IpAddr = ip.parse().unwrap();
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peer.add_subnet(mask, len);
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// every iteration sends 10 GB
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b.iter(|| {
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opaque.store(0, Ordering::SeqCst);
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let msg = make_packet(1024, ip1);
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while opaque.load(Ordering::Acquire) < 10 * 1024 * 1024 {
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router.send(msg.to_vec()).unwrap();
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}
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});
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}
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#[test]
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fn test_outbound() {
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init();
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// create device
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let (_fake, _reader, tun_writer, _mtu) = dummy::TunTest::create(1500, false);
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let router: Device<_, TestCallbacks, _, _> = Device::new(1, tun_writer);
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router.set_outbound_writer(dummy::VoidBind::new());
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let tests = vec![
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("192.168.1.0", 24, "192.168.1.20", true),
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("172.133.133.133", 32, "172.133.133.133", true),
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("172.133.133.133", 32, "172.133.133.132", false),
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(
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"2001:db8::ff00:42:0000",
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112,
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"2001:db8::ff00:42:3242",
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true,
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),
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(
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"2001:db8::ff00:42:8000",
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113,
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"2001:db8::ff00:42:0660",
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false,
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),
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(
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"2001:db8::ff00:42:8000",
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113,
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"2001:db8::ff00:42:ffff",
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true,
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),
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];
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for (num, (mask, len, ip, okay)) in tests.iter().enumerate() {
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for set_key in vec![true, false] {
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debug!("index = {}, set_key = {}", num, set_key);
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// add new peer
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let opaque = Opaque::new();
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let peer = router.new_peer(opaque.clone());
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let mask: IpAddr = mask.parse().unwrap();
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if set_key {
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peer.add_keypair(dummy::keypair(true));
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}
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// map subnet to peer
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peer.add_subnet(mask, *len);
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// create "IP packet"
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let msg = make_packet(1024, ip.parse().unwrap());
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// cryptkey route the IP packet
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let res = router.send(msg);
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// allow some scheduling
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wait();
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if *okay {
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// cryptkey routing succeeded
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assert!(res.is_ok(), "crypt-key routing should succeed");
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assert_eq!(
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opaque.need_key().is_some(),
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!set_key,
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"should have requested a new key, if no encryption state was set"
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);
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assert_eq!(
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opaque.send().is_some(),
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set_key,
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"transmission should have been attempted"
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);
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assert!(
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opaque.recv().is_none(),
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"no messages should have been marked as received"
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);
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} else {
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// no such cryptkey route
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assert!(res.is_err(), "crypt-key routing should fail");
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assert!(
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opaque.need_key().is_none(),
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"should not request a new-key if crypt-key routing failed"
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);
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assert_eq!(
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opaque.send(),
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if set_key {
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Some((SIZE_KEEPALIVE, false, false))
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} else {
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None
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},
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"transmission should only happen if key was set (keepalive)",
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);
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assert!(
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opaque.recv().is_none(),
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"no messages should have been marked as received",
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);
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}
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}
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}
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}
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#[test]
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fn test_bidirectional() {
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init();
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let tests = [
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(
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false, // confirm with keepalive
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("192.168.1.0", 24, "192.168.1.20", true),
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("172.133.133.133", 32, "172.133.133.133", true),
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),
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(
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true, // confirm with staged packet
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("192.168.1.0", 24, "192.168.1.20", true),
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("172.133.133.133", 32, "172.133.133.133", true),
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),
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(
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false, // confirm with keepalive
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(
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"2001:db8::ff00:42:8000",
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113,
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"2001:db8::ff00:42:ffff",
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true,
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),
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(
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"2001:db8::ff40:42:8000",
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113,
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"2001:db8::ff40:42:ffff",
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true,
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),
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),
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(
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false, // confirm with staged packet
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(
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"2001:db8::ff00:42:8000",
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113,
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"2001:db8::ff00:42:ffff",
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true,
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),
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(
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"2001:db8::ff40:42:8000",
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113,
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"2001:db8::ff40:42:ffff",
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true,
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),
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),
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];
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for (stage, p1, p2) in tests.iter() {
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let ((bind_reader1, bind_writer1), (bind_reader2, bind_writer2)) =
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dummy::PairBind::pair();
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// create matching device
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let (_fake, _, tun_writer1, _) = dummy::TunTest::create(1500, false);
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let (_fake, _, tun_writer2, _) = dummy::TunTest::create(1500, false);
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let router1: Device<_, TestCallbacks, _, _> = Device::new(1, tun_writer1);
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router1.set_outbound_writer(bind_writer1);
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let router2: Device<_, TestCallbacks, _, _> = Device::new(1, tun_writer2);
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router2.set_outbound_writer(bind_writer2);
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// prepare opaque values for tracing callbacks
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let opaq1 = Opaque::new();
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let opaq2 = Opaque::new();
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// create peers with matching keypairs and assign subnets
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let (mask, len, _ip, _okay) = p1;
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let peer1 = router1.new_peer(opaq1.clone());
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let mask: IpAddr = mask.parse().unwrap();
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peer1.add_subnet(mask, *len);
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peer1.add_keypair(dummy::keypair(false));
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let (mask, len, _ip, _okay) = p2;
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let peer2 = router2.new_peer(opaq2.clone());
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let mask: IpAddr = mask.parse().unwrap();
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peer2.add_subnet(mask, *len);
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peer2.set_endpoint(dummy::UnitEndpoint::new());
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if *stage {
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// stage a packet which can be used for confirmation (in place of a keepalive)
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let (_mask, _len, ip, _okay) = p2;
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let msg = make_packet(1024, ip.parse().unwrap());
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router2.send(msg).expect("failed to sent staged packet");
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wait();
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assert!(opaq2.recv().is_none());
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assert!(
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opaq2.send().is_none(),
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"sending should fail as not key is set"
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);
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assert!(
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opaq2.need_key().is_some(),
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"a new key should be requested since a packet was attempted transmitted"
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);
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assert!(opaq2.is_empty(), "callbacks should only run once");
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}
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// this should cause a key-confirmation packet (keepalive or staged packet)
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// this also causes peer1 to learn the "endpoint" for peer2
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assert!(peer1.get_endpoint().is_none());
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peer2.add_keypair(dummy::keypair(true));
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wait();
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assert!(opaq2.send().is_some());
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assert!(opaq2.is_empty(), "events on peer2 should be 'send'");
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assert!(opaq1.is_empty(), "nothing should happened on peer1");
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// read confirming message received by the other end ("across the internet")
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let mut buf = vec![0u8; 2048];
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let (len, from) = bind_reader1.read(&mut buf).unwrap();
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buf.truncate(len);
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router1.recv(from, buf).unwrap();
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wait();
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assert!(opaq1.recv().is_some());
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assert!(opaq1.key_confirmed().is_some());
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assert!(
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opaq1.is_empty(),
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"events on peer1 should be 'recv' and 'key_confirmed'"
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);
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assert!(peer1.get_endpoint().is_some());
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assert!(opaq2.is_empty(), "nothing should happened on peer2");
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// now that peer1 has an endpoint
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// route packets : peer1 -> peer2
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for _ in 0..10 {
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assert!(
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opaq1.is_empty(),
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"we should have asserted a value for every callback on peer1"
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);
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assert!(
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opaq2.is_empty(),
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"we should have asserted a value for every callback on peer2"
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);
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// pass IP packet to router
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let (_mask, _len, ip, _okay) = p1;
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let msg = make_packet(1024, ip.parse().unwrap());
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router1.send(msg).unwrap();
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wait();
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assert!(opaq1.send().is_some());
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assert!(opaq1.recv().is_none());
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assert!(opaq1.need_key().is_none());
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// receive ("across the internet") on the other end
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let mut buf = vec![0u8; 2048];
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let (len, from) = bind_reader2.read(&mut buf).unwrap();
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buf.truncate(len);
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router2.recv(from, buf).unwrap();
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wait();
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assert!(opaq2.send().is_none());
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assert!(opaq2.recv().is_some());
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assert!(opaq2.need_key().is_none());
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}
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}
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}
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}
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