Add deployable QUIC P2P hole-punch coordination server

tests/registry.rs

@@ -0,0 +1,35 @@
+use super::*;
+#[test]
+fn authenticated_observed_endpoints_expire_and_capacity_and_retry_rates_are_bounded() {
+    let (a, b) = (PeerId::random(), PeerId::random());
+    let mut registry = Registry::new(2, 60);
+    let ep_a = "127.0.0.1:9000".parse().unwrap();
+    let ep_b = "127.0.0.1:9001".parse().unwrap();
+    assert!(registry.connect(a, b).is_err());
+    assert!(
+        matches!(registry.register(a,ep_a),Response::Registered{endpoint,..} if endpoint==ep_a)
+    );
+    registry.register(b, ep_b);
+    assert!(matches!(
+        registry.register(PeerId::random(), ep_a),
+        Response::Error { .. }
+    ));
+    let (actual_a, actual_b, _) = registry.connect(a, b).unwrap();
+    assert_eq!((actual_a, actual_b), (ep_a, ep_b));
+    registry.register(a, ep_a);
+    assert!(registry.connect(a, b).is_err());
+    assert!(registry.connect(a, a).is_err());
+    registry.clients.get_mut(&b).unwrap().seen -= Duration::from_secs(61);
+    registry.expire();
+    assert!(registry.connect(a, b).is_err());
+    registry.remove(a);
+    assert!(registry.clients.is_empty());
+}
+#[test]
+fn only_quic_addresses_produce_udp_candidates() {
+    assert!(socket_address(&"/ip4/127.0.0.1/tcp/9000".parse().unwrap()).is_none());
+    assert_eq!(
+        socket_address(&"/ip4/127.0.0.1/udp/9000/quic-v1".parse().unwrap()).unwrap(),
+        "127.0.0.1:9000".parse().unwrap()
+    );
+}