Merge branch 'fix-macos-tests' into main

12 files changed, 277 insertions, 335 deletions

diff --git a/test/test-manager/src/tests/account.rs b/test/test-manager/src/tests/account.rs
index 5b1991abb5..92c95346b2 100644
--- a/test/test-manager/src/tests/account.rs
+++ b/test/test-manager/src/tests/account.rs
@@ -107,12 +107,13 @@ pub async fn test_too_many_devices(
     )
     .await
     .unwrap();
-    assert!(ui_result.success());
 
     if let Err(error) = clear_devices(&device_client).await {
         log::error!("Failed to clear devices: {error}");
     }
 
+    assert!(ui_result.success());
+
     Ok(())
 }
 
diff --git a/test/test-manager/src/tests/dns.rs b/test/test-manager/src/tests/dns.rs
index 310d5eb0dc..89755c3fd6 100644
--- a/test/test-manager/src/tests/dns.rs
+++ b/test/test-manager/src/tests/dns.rs
@@ -9,9 +9,12 @@ use mullvad_management_interface::{types, ManagementServiceClient};
 use mullvad_types::{relay_constraints::RelaySettings, ConnectionConfig, CustomTunnelEndpoint};
 use talpid_types::net::wireguard;
 use test_macro::test_function;
-use test_rpc::{Interface, ServiceClient};
+use test_rpc::ServiceClient;
 
-use super::{helpers::connect_and_wait, Error, TestContext};
+use super::{
+    helpers::{self, connect_and_wait, set_relay_settings},
+    Error, TestContext,
+};
 use crate::network_monitor::{
     start_packet_monitor_until, start_tunnel_packet_monitor_until, Direction, IpHeaderProtocols,
     MonitorOptions,
@@ -22,8 +25,6 @@ use crate::vm::network::{
     CUSTOM_TUN_REMOTE_TUN_ADDR, NON_TUN_GATEWAY,
 };
 
-use super::helpers::set_relay_settings;
-
 /// How long to wait for expected "DNS queries" to appear
 const MONITOR_TIMEOUT: Duration = Duration::from_secs(5);
 
@@ -47,7 +48,7 @@ pub async fn test_dns_leak_default(
     leak_test_dns(
         &rpc,
         &mut mullvad_client,
-        Interface::Tunnel,
+        true,
         IpAddr::V4(CUSTOM_TUN_REMOTE_TUN_ADDR),
     )
     .await
@@ -82,7 +83,7 @@ pub async fn test_dns_leak_custom_public_ip(
         .await
         .expect("failed to configure DNS server");
 
-    leak_test_dns(&rpc, &mut mullvad_client, Interface::Tunnel, CONFIG_IP).await
+    leak_test_dns(&rpc, &mut mullvad_client, true, CONFIG_IP).await
 }
 
 /// Test whether DNS leaks can be produced when using a custom private IP. This test succeeds if and
@@ -114,7 +115,7 @@ pub async fn test_dns_leak_custom_private_ip(
         .await
         .expect("failed to configure DNS server");
 
-    leak_test_dns(&rpc, &mut mullvad_client, Interface::NonTunnel, CONFIG_IP).await
+    leak_test_dns(&rpc, &mut mullvad_client, false, CONFIG_IP).await
 }
 
 /// See whether it is possible to send "DNS queries" to a particular whitelisted destination on
@@ -124,11 +125,9 @@ pub async fn test_dns_leak_custom_private_ip(
 async fn leak_test_dns(
     rpc: &ServiceClient,
     mullvad_client: &mut ManagementServiceClient,
-    interface: Interface,
+    use_tun: bool,
     whitelisted_dest: IpAddr,
 ) -> Result<(), Error> {
-    let use_tun = interface == Interface::Tunnel;
-
     //
     // Connect to local wireguard relay
     //
@@ -137,24 +136,32 @@ async fn leak_test_dns(
         .await
         .expect("failed to connect to custom wg relay");
 
-    let guest_ip = rpc
-        .get_interface_ip(Interface::NonTunnel)
+    let nontun_iface = rpc
+        .get_default_interface()
+        .await
+        .expect("failed to find non-tun interface");
+    let tunnel_iface = helpers::get_tunnel_interface(mullvad_client.clone())
+        .await
+        .expect("failed to find tunnel interface");
+
+    let nontun_ip = rpc
+        .get_interface_ip(nontun_iface.clone())
         .await
         .expect("failed to obtain guest IP");
     let tunnel_ip = rpc
-        .get_interface_ip(Interface::Tunnel)
+        .get_interface_ip(tunnel_iface.clone())
         .await
         .expect("failed to obtain tunnel IP");
 
     log::debug!("Tunnel (guest) IP: {tunnel_ip}");
-    log::debug!("Non-tunnel (guest) IP: {guest_ip}");
+    log::debug!("Non-tunnel (guest) IP: {nontun_ip}");
 
     //
     // Spoof DNS packets
     //
 
     let tun_bind_addr = SocketAddr::new(tunnel_ip, 0);
-    let guest_bind_addr = SocketAddr::new(guest_ip, 0);
+    let nontun_bind_addr = SocketAddr::new(nontun_ip, 0);
 
     let whitelisted_dest = SocketAddr::new(whitelisted_dest, 53);
     let blocked_dest_local = "10.64.100.100:53".parse().unwrap();
@@ -216,40 +223,35 @@ async fn leak_test_dns(
             // send to allowed dest
             spoof_packets(
                 &rpc,
-                Some(Interface::Tunnel),
+                Some(tunnel_iface.clone()),
                 tun_bind_addr,
                 whitelisted_dest,
             ),
             spoof_packets(
                 &rpc,
-                Some(Interface::NonTunnel),
-                guest_bind_addr,
+                Some(nontun_iface.clone()),
+                nontun_bind_addr,
                 whitelisted_dest,
             ),
             // send to blocked local dest
             spoof_packets(
                 &rpc,
-                Some(Interface::Tunnel),
+                Some(tunnel_iface.clone()),
                 tun_bind_addr,
                 blocked_dest_local,
             ),
             spoof_packets(
                 &rpc,
-                Some(Interface::NonTunnel),
-                guest_bind_addr,
+                Some(nontun_iface.clone()),
+                nontun_bind_addr,
                 blocked_dest_local,
             ),
             // send to blocked public dest
+            spoof_packets(&rpc, Some(tunnel_iface), tun_bind_addr, blocked_dest_public,),
             spoof_packets(
                 &rpc,
-                Some(Interface::Tunnel),
-                tun_bind_addr,
-                blocked_dest_public,
-            ),
-            spoof_packets(
-                &rpc,
-                Some(Interface::NonTunnel),
-                guest_bind_addr,
+                Some(nontun_iface),
+                nontun_bind_addr,
                 blocked_dest_public,
             ),
         )
@@ -578,17 +580,25 @@ async fn run_dns_config_test<
         }
     }
 
-    let guest_ip = rpc
-        .get_interface_ip(Interface::NonTunnel)
+    let nontun_iface = rpc
+        .get_default_interface()
+        .await
+        .expect("failed to find non-tun interface");
+    let tunnel_iface = helpers::get_tunnel_interface(mullvad_client.clone())
+        .await
+        .expect("failed to find tunnel interface");
+
+    let nontun_ip = rpc
+        .get_interface_ip(nontun_iface)
         .await
         .expect("failed to obtain guest IP");
     let tunnel_ip = rpc
-        .get_interface_ip(Interface::Tunnel)
+        .get_interface_ip(tunnel_iface)
         .await
         .expect("failed to obtain tunnel IP");
 
     log::debug!("Tunnel (guest) IP: {tunnel_ip}");
-    log::debug!("Non-tunnel (guest) IP: {guest_ip}");
+    log::debug!("Non-tunnel (guest) IP: {nontun_ip}");
 
     let monitor = create_monitor().await;
 
@@ -661,19 +671,21 @@ async fn connect_local_wg_relay(mullvad_client: &mut ManagementServiceClient) ->
 
 async fn spoof_packets(
     rpc: &ServiceClient,
-    interface: Option<Interface>,
+    interface: Option<String>,
     bind_addr: SocketAddr,
     dest: SocketAddr,
 ) {
     let tcp_rpc = rpc.clone();
+    let tcp_interface = interface.clone();
     let tcp_send = async move {
         log::debug!("sending to {}/tcp from {}", dest, bind_addr);
-        let _ = tcp_rpc.send_tcp(interface, bind_addr, dest).await;
+        let _ = tcp_rpc.send_tcp(tcp_interface, bind_addr, dest).await;
     };
     let udp_rpc = rpc.clone();
+    let udp_interface = interface.clone();
     let udp_send = async move {
         log::debug!("sending to {}/udp from {}", dest, bind_addr);
-        let _ = udp_rpc.send_udp(interface, bind_addr, dest).await;
+        let _ = udp_rpc.send_udp(udp_interface, bind_addr, dest).await;
     };
     let _ = tokio::join!(tcp_send, udp_send);
 }
diff --git a/test/test-manager/src/tests/helpers.rs b/test/test-manager/src/tests/helpers.rs
index ea876bbbbe..5b1c0a9903 100644
--- a/test/test-manager/src/tests/helpers.rs
+++ b/test/test-manager/src/tests/helpers.rs
@@ -1,7 +1,7 @@
 use super::{config::TEST_CONFIG, Error, PING_TIMEOUT, WAIT_FOR_TUNNEL_STATE_TIMEOUT};
 use crate::network_monitor::{start_packet_monitor, MonitorOptions};
 use futures::StreamExt;
-use mullvad_management_interface::{types, ManagementServiceClient};
+use mullvad_management_interface::{types, ManagementServiceClient, MullvadProxyClient};
 use mullvad_types::{
     location::Location,
     relay_constraints::{
@@ -19,7 +19,7 @@ use std::{
     time::Duration,
 };
 use talpid_types::net::wireguard::{PeerConfig, PrivateKey, TunnelConfig};
-use test_rpc::{package::Package, AmIMullvad, Interface, ServiceClient};
+use test_rpc::{package::Package, AmIMullvad, ServiceClient};
 use tokio::time::timeout;
 
 #[macro_export]
@@ -82,17 +82,30 @@ pub async fn using_mullvad_exit(rpc: &ServiceClient) -> bool {
         .mullvad_exit_ip
 }
 
+/// Get VPN tunnel interface name
+pub async fn get_tunnel_interface(rpc: ManagementServiceClient) -> Option<String> {
+    let mut client = MullvadProxyClient::from_rpc_client(rpc);
+    match client.get_tunnel_state().await.ok()? {
+        TunnelState::Connecting { endpoint, .. } | TunnelState::Connected { endpoint, .. } => {
+            endpoint.tunnel_interface
+        }
+        _ => None,
+    }
+}
+
 /// Sends a number of probes and returns the number of observed packets (UDP, TCP, or ICMP)
 pub async fn send_guest_probes(
     rpc: ServiceClient,
-    interface: Option<Interface>,
+    interface: String,
     destination: SocketAddr,
 ) -> Result<ProbeResult, Error> {
+    const MONITOR_DURATION: Duration = Duration::from_secs(8);
+
     let pktmon = start_packet_monitor(
         move |packet| packet.destination.ip() == destination.ip(),
         MonitorOptions {
             direction: Some(crate::network_monitor::Direction::In),
-            timeout: Some(Duration::from_secs(3)),
+            timeout: Some(MONITOR_DURATION),
             ..Default::default()
         },
     )
@@ -100,7 +113,7 @@ pub async fn send_guest_probes(
 
     let send_handle = tokio::spawn(send_guest_probes_without_monitor(
         rpc,
-        interface,
+        Some(interface),
         destination,
     ));
 
@@ -132,12 +145,12 @@ pub async fn send_guest_probes(
 /// Send one probe per transport protocol to `destination` without running a packet monitor
 pub async fn send_guest_probes_without_monitor(
     rpc: ServiceClient,
-    interface: Option<Interface>,
+    interface: Option<String>,
     destination: SocketAddr,
 ) {
-    let bind_addr = if let Some(interface) = interface {
+    let bind_addr = if let Some(ref interface) = interface {
         SocketAddr::new(
-            rpc.get_interface_ip(interface)
+            rpc.get_interface_ip(interface.clone())
                 .await
                 .expect("failed to obtain interface IP"),
             0,
@@ -147,9 +160,19 @@ pub async fn send_guest_probes_without_monitor(
     };
 
     let tcp_rpc = rpc.clone();
-    let tcp_send = async move { tcp_rpc.send_tcp(interface, bind_addr, destination).await };
+    let tcp_interface = interface.clone();
+    let tcp_send = async move {
+        tcp_rpc
+            .send_tcp(tcp_interface, bind_addr, destination)
+            .await
+    };
     let udp_rpc = rpc.clone();
-    let udp_send = async move { udp_rpc.send_udp(interface, bind_addr, destination).await };
+    let udp_interface = interface.clone();
+    let udp_send = async move {
+        udp_rpc
+            .send_udp(udp_interface, bind_addr, destination)
+            .await
+    };
     let icmp = async move { ping_with_timeout(&rpc, destination.ip(), interface).await };
     let _ = tokio::join!(tcp_send, udp_send, icmp);
 }
@@ -157,7 +180,7 @@ pub async fn send_guest_probes_without_monitor(
 pub async fn ping_with_timeout(
     rpc: &ServiceClient,
     dest: IpAddr,
-    interface: Option<Interface>,
+    interface: Option<String>,
 ) -> Result<(), Error> {
     timeout(PING_TIMEOUT, rpc.send_ping(interface, dest))
         .await
@@ -449,30 +472,6 @@ pub fn unreachable_wireguard_tunnel() -> talpid_types::net::wireguard::Connectio
     }
 }
 
-/// Randomly select an entry and exit node from the daemon's relay list.
-/// The exit node is distinct from the entry node.
-///
-/// * `mullvad_client` - An interface to the Mullvad daemon.
-/// * `critera` - A function used to determine which relays to include in random selection.
-pub async fn random_entry_and_exit<Filter>(
-    mullvad_client: &mut ManagementServiceClient,
-    criteria: Filter,
-) -> Result<(Relay, Relay), Error>
-where
-    Filter: Fn(&Relay) -> bool,
-{
-    use itertools::Itertools;
-    // Pluck the first 2 relays and return them as a tuple.
-    // This will fail if there are less than 2 relays in the relay list.
-    filter_relays(mullvad_client, criteria)
-        .await?
-        .into_iter()
-        .next_tuple()
-        .ok_or(Error::Other(
-            "failed to randomly select two relays from daemon's relay list".to_string(),
-        ))
-}
-
 /// Return a filtered version of the daemon's relay list.
 ///
 /// * `mullvad_client` - An interface to the Mullvad daemon.
diff --git a/test/test-manager/src/tests/install.rs b/test/test-manager/src/tests/install.rs
index 04d401a22d..37a89f5fc8 100644
--- a/test/test-manager/src/tests/install.rs
+++ b/test/test-manager/src/tests/install.rs
@@ -11,7 +11,7 @@ use std::{
 };
 use test_macro::test_function;
 use test_rpc::meta::Os;
-use test_rpc::{mullvad_daemon::ServiceStatus, Interface, ServiceClient};
+use test_rpc::{mullvad_daemon::ServiceStatus, ServiceClient};
 
 /// Install the last stable version of the app and verify that it is running.
 #[test_function(priority = -200)]
@@ -102,10 +102,14 @@ pub async fn test_upgrade_app(ctx: TestContext, rpc: ServiceClient) -> Result<()
     // Begin monitoring outgoing traffic and pinging
     //
 
+    let guest_iface = rpc
+        .get_default_interface()
+        .await
+        .expect("failed to obtain default interface");
     let guest_ip = rpc
-        .get_interface_ip(Interface::NonTunnel)
+        .get_interface_ip(guest_iface)
         .await
-        .expect("failed to obtain tunnel IP");
+        .expect("failed to obtain non-tun IP");
     log::debug!("Guest IP: {guest_ip}");
 
     log::debug!("Monitoring outgoing traffic");
diff --git a/test/test-manager/src/tests/mod.rs b/test/test-manager/src/tests/mod.rs
index b35f1b9b7a..ada613ca34 100644
--- a/test/test-manager/src/tests/mod.rs
+++ b/test/test-manager/src/tests/mod.rs
@@ -63,6 +63,7 @@ pub enum Error {
     #[error(display = "Failed to parse gRPC response")]
     InvalidGrpcResponse(#[error(source)] types::FromProtobufTypeError),
 
+    #[cfg(target_os = "macos")]
     #[error(display = "An error occurred: {}", _0)]
     Other(String),
 }
diff --git a/test/test-manager/src/tests/settings.rs b/test/test-manager/src/tests/settings.rs
index 4c5808f790..aea81028fe 100644
--- a/test/test-manager/src/tests/settings.rs
+++ b/test/test-manager/src/tests/settings.rs
@@ -1,5 +1,5 @@
 use super::helpers;
-use super::helpers::{connect_and_wait, disconnect_and_wait, get_tunnel_state, send_guest_probes};
+use super::helpers::{connect_and_wait, get_tunnel_state, send_guest_probes};
 use super::{Error, TestContext};
 use crate::assert_tunnel_state;
 use crate::vm::network::DUMMY_LAN_INTERFACE_IP;
@@ -8,7 +8,7 @@ use mullvad_management_interface::ManagementServiceClient;
 use mullvad_types::states::TunnelState;
 use std::net::{IpAddr, SocketAddr};
 use test_macro::test_function;
-use test_rpc::{Interface, ServiceClient};
+use test_rpc::ServiceClient;
 
 /// Verify that traffic to private IPs is blocked when
 /// "local network sharing" is disabled, but not blocked
@@ -46,11 +46,12 @@ pub async fn test_lan(
 
     log::info!("Test whether outgoing LAN traffic is blocked");
 
+    let default_interface = rpc.get_default_interface().await?;
     let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), lan_destination).await?;
+        send_guest_probes(rpc.clone(), default_interface.clone(), lan_destination).await?;
     assert!(
         detected_probes.none(),
-        "observed unexpected outgoing LAN packets"
+        "observed unexpected outgoing LAN packets: {detected_probes:?}"
     );
 
     //
@@ -71,14 +72,12 @@ pub async fn test_lan(
     log::info!("Test whether outgoing LAN traffic is blocked");
 
     let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), lan_destination).await?;
+        send_guest_probes(rpc.clone(), default_interface, lan_destination).await?;
     assert!(
         detected_probes.all(),
-        "did not observe all outgoing LAN packets"
+        "did not observe all outgoing LAN packets: {detected_probes:?}"
     );
 
-    disconnect_and_wait(&mut mullvad_client).await?;
-
     Ok(())
 }
 
@@ -133,15 +132,20 @@ pub async fn test_lockdown(
     // Ensure all destinations are unreachable
     //
 
+    let default_interface = rpc.get_default_interface().await?;
+
     let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), lan_destination).await?;
-    assert!(detected_probes.none(), "observed outgoing packets to LAN");
+        send_guest_probes(rpc.clone(), default_interface.clone(), lan_destination).await?;
+    assert!(
+        detected_probes.none(),
+        "observed outgoing packets to LAN: {detected_probes:?}"
+    );
 
     let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_destination).await?;
+        send_guest_probes(rpc.clone(), default_interface.clone(), inet_destination).await?;
     assert!(
         detected_probes.none(),
-        "observed outgoing packets to internet"
+        "observed outgoing packets to internet: {detected_probes:?}"
     );
 
     //
@@ -160,17 +164,17 @@ pub async fn test_lockdown(
     //
 
     let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), lan_destination).await?;
+        send_guest_probes(rpc.clone(), default_interface.clone(), lan_destination).await?;
     assert!(
         detected_probes.all(),
-        "did not observe some outgoing packets"
+        "did not observe some outgoing packets: {detected_probes:?}"
     );
 
     let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_destination).await?;
+        send_guest_probes(rpc.clone(), default_interface.clone(), inet_destination).await?;
     assert!(
         detected_probes.none(),
-        "observed outgoing packets to internet"
+        "observed outgoing packets to internet: {detected_probes:?}"
     );
 
     //
@@ -191,10 +195,10 @@ pub async fn test_lockdown(
     // Send traffic outside the tunnel to sanity check that the internet is *not* reachable via non-
     // tunnel interfaces.
     let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_destination).await?;
+        send_guest_probes(rpc.clone(), default_interface, inet_destination).await?;
     assert!(
         detected_probes.none(),
-        "observed outgoing packets to internet"
+        "observed outgoing packets to internet: {detected_probes:?}"
     );
 
     //
@@ -205,7 +209,5 @@ pub async fn test_lockdown(
         .await
         .expect("failed to disable lockdown mode");
 
-    disconnect_and_wait(&mut mullvad_client).await?;
-
     Ok(())
 }
diff --git a/test/test-manager/src/tests/tunnel.rs b/test/test-manager/src/tests/tunnel.rs
index 1f1d61670e..6f759d7826 100644
--- a/test/test-manager/src/tests/tunnel.rs
+++ b/test/test-manager/src/tests/tunnel.rs
@@ -10,14 +10,13 @@ use mullvad_types::relay_constraints::{
     OpenVpnConstraints, RelayConstraints, RelaySettings, SelectedObfuscation, TransportPort,
     Udp2TcpObfuscationSettings, WireguardConstraints,
 };
-use mullvad_types::relay_list::{Relay, RelayEndpointData};
 use mullvad_types::wireguard;
 use pnet_packet::ip::IpNextHeaderProtocols;
 use talpid_types::net::{TransportProtocol, TunnelType};
 use test_macro::test_function;
 use test_rpc::meta::Os;
 use test_rpc::mullvad_daemon::ServiceStatus;
-use test_rpc::{Interface, ServiceClient};
+use test_rpc::ServiceClient;
 
 /// Set up an OpenVPN tunnel, UDP as well as TCP.
 /// This test fails if a working tunnel cannot be set up.
@@ -123,18 +122,14 @@ pub async fn test_wireguard_tunnel(
     Ok(())
 }
 
-/// Use udp2tcp obfuscation. This test connects to a
-/// WireGuard relay over TCP. It fails if no outgoing TCP
-/// traffic to the relay is observed on the expected port.
+/// Use udp2tcp obfuscation. This test connects to a WireGuard relay over TCP. It fails if no
+/// outgoing TCP traffic to the relay is observed on the expected port.
 #[test_function]
 pub async fn test_udp2tcp_tunnel(
     _: TestContext,
     rpc: ServiceClient,
     mut mullvad_client: ManagementServiceClient,
 ) -> Result<(), Error> {
-    // TODO: check if src <-> target / tcp is observed (only)
-    // TODO: ping a public IP on the fake network (not possible using real relay)
-
     mullvad_client
         .set_obfuscation_settings(types::ObfuscationSettings::from(ObfuscationSettings {
             selected_obfuscation: SelectedObfuscation::Udp2Tcp,
@@ -158,18 +153,19 @@ pub async fn test_udp2tcp_tunnel(
 
     connect_and_wait(&mut mullvad_client).await?;
 
+    let endpoint = match helpers::get_tunnel_state(&mut mullvad_client).await {
+        mullvad_types::states::TunnelState::Connected { endpoint, .. } => endpoint.endpoint,
+        _ => panic!("unexpected tunnel state"),
+    };
+
     //
     // Set up packet monitor
     //
 
-    let guest_ip = rpc
-        .get_interface_ip(Interface::NonTunnel)
-        .await
-        .expect("failed to obtain inet interface IP");
-
     let monitor = start_packet_monitor(
         move |packet| {
-            packet.source.ip() != guest_ip || (packet.protocol == IpNextHeaderProtocols::Tcp)
+            packet.destination.ip() == endpoint.address.ip()
+                && packet.protocol == IpNextHeaderProtocols::Tcp
         },
         MonitorOptions::default(),
     )
@@ -185,9 +181,10 @@ pub async fn test_udp2tcp_tunnel(
     );
 
     let monitor_result = monitor.into_result().await.unwrap();
-    assert_eq!(monitor_result.discarded_packets, 0);
-
-    disconnect_and_wait(&mut mullvad_client).await?;
+    assert!(
+        !monitor_result.packets.is_empty(),
+        "detected no tcp traffic",
+    );
 
     Ok(())
 }
@@ -235,22 +232,19 @@ pub async fn test_bridge(
 
     log::info!("Connect to OpenVPN relay via bridge");
 
-    connect_and_wait(&mut mullvad_client)
-        .await
-        .expect("connect_and_wait");
+    connect_and_wait(&mut mullvad_client).await?;
 
-    let tunnel = helpers::get_tunnel_state(&mut mullvad_client).await;
-    let (entry, exit) = match tunnel {
+    let (entry, exit) = match helpers::get_tunnel_state(&mut mullvad_client).await {
         mullvad_types::states::TunnelState::Connected { endpoint, .. } => {
             (endpoint.proxy.unwrap().endpoint, endpoint.endpoint)
         }
-        _ => return Err(Error::DaemonError("daemon entered error state".to_string())),
+        _ => panic!("unexpected tunnel state"),
     };
 
     log::info!(
-        "Selected entry bridge {entry_ip} & exit relay {exit_ip}",
-        entry_ip = entry.address.ip().to_string(),
-        exit_ip = exit.address.ip().to_string()
+        "Selected entry bridge {entry_addr} & exit relay {exit_addr}",
+        entry_addr = entry.address,
+        exit_addr = exit.address
     );
 
     // Start recording outgoing packets. Their destination will be verified
@@ -284,14 +278,11 @@ pub async fn test_bridge(
         "detected no traffic to entry server",
     );
 
-    disconnect_and_wait(&mut mullvad_client).await?;
-
     Ok(())
 }
 
 /// Test whether WireGuard multihop works. This fails if:
-/// * No outgoing traffic to the entry relay is
-///   observed from the SUT.
+/// * No outgoing traffic to the entry relay is observed from the SUT.
 /// * The conncheck reports an unexpected exit relay.
 #[test_function]
 pub async fn test_multihop(
@@ -299,24 +290,12 @@ pub async fn test_multihop(
     rpc: ServiceClient,
     mut mullvad_client: ManagementServiceClient,
 ) -> Result<(), Error> {
-    //
-    // Set relays to use
-    //
-
-    log::info!("Select relay");
-    let relay_filter = |relay: &Relay| {
-        relay.active && matches!(relay.endpoint_data, RelayEndpointData::Wireguard(_))
-    };
-    let (entry, exit) = helpers::random_entry_and_exit(&mut mullvad_client, relay_filter).await?;
-    let exit_constraint = helpers::into_constraint(&exit);
     let wireguard_constraints = WireguardConstraints {
         use_multihop: true,
-        entry_location: helpers::into_constraint(&entry),
         ..Default::default()
     };
 
     let relay_settings = RelaySettings::Normal(RelayConstraints {
-        location: exit_constraint,
         wireguard_constraints,
         ..Default::default()
     });
@@ -329,25 +308,32 @@ pub async fn test_multihop(
     // Connect
     //
 
-    let monitor = start_packet_monitor(
-        move |packet| {
-            packet.destination.ip() == entry.ipv4_addr_in
-                && packet.protocol == IpNextHeaderProtocols::Udp
-        },
-        MonitorOptions::default(),
-    )
-    .await;
+    log::info!("Connect using WG multihop");
 
     connect_and_wait(&mut mullvad_client).await?;
 
+    let (entry, exit) = match helpers::get_tunnel_state(&mut mullvad_client).await {
+        mullvad_types::states::TunnelState::Connected { endpoint, .. } => {
+            (endpoint.entry_endpoint.unwrap(), endpoint.endpoint)
+        }
+        _ => panic!("unexpected tunnel state"),
+    };
+
+    log::info!(
+        "Selected entry {entry_addr} & exit relay {exit_addr}",
+        entry_addr = entry.address,
+        exit_addr = exit.address
+    );
+
     //
-    // Verify entry IP
+    // Record outgoing packets to the entry relay
     //
 
-    log::info!("Verifying entry server");
-
-    let monitor_result = monitor.into_result().await.unwrap();
-    assert!(!monitor_result.packets.is_empty(), "no matching packets",);
+    let monitor = start_packet_monitor(
+        move |packet| packet.destination.ip() == entry.address.ip(),
+        MonitorOptions::default(),
+    )
+    .await;
 
     //
     // Verify exit IP
@@ -358,7 +344,14 @@ pub async fn test_multihop(
         "expected Mullvad exit IP"
     );
 
-    disconnect_and_wait(&mut mullvad_client).await?;
+    //
+    // Verify entry IP
+    //
+
+    log::info!("Verifying entry server");
+
+    let monitor_result = monitor.into_result().await.unwrap();
+    assert!(!monitor_result.packets.is_empty(), "no matching packets",);
 
     Ok(())
 }
@@ -473,7 +466,7 @@ pub async fn test_quantum_resistant_tunnel(
     //
 
     connect_and_wait(&mut mullvad_client).await?;
-    check_tunnel_psk(&rpc, false).await;
+    check_tunnel_psk(&rpc, &mullvad_client, false).await;
 
     log::info!("Setting tunnel protocol to WireGuard");
 
@@ -497,7 +490,7 @@ pub async fn test_quantum_resistant_tunnel(
     //
 
     connect_and_wait(&mut mullvad_client).await?;
-    check_tunnel_psk(&rpc, true).await;
+    check_tunnel_psk(&rpc, &mullvad_client, true).await;
 
     assert!(
         helpers::using_mullvad_exit(&rpc).await,
@@ -507,11 +500,14 @@ pub async fn test_quantum_resistant_tunnel(
     Ok(())
 }
 
-async fn check_tunnel_psk(rpc: &ServiceClient, should_have_psk: bool) {
+async fn check_tunnel_psk(
+    rpc: &ServiceClient,
+    mullvad_client: &ManagementServiceClient,
+    should_have_psk: bool,
+) {
     match rpc.get_os().await.expect("failed to get OS") {
         Os::Linux => {
-            let name = rpc
-                .get_interface_name(Interface::Tunnel)
+            let name = helpers::get_tunnel_interface(mullvad_client.clone())
                 .await
                 .expect("failed to get tun name");
             let output = rpc
diff --git a/test/test-manager/src/tests/tunnel_state.rs b/test/test-manager/src/tests/tunnel_state.rs
index 87fda3b685..eb78828fd0 100644
--- a/test/test-manager/src/tests/tunnel_state.rs
+++ b/test/test-manager/src/tests/tunnel_state.rs
@@ -1,6 +1,6 @@
 use super::helpers::{
-    self, connect_and_wait, disconnect_and_wait, get_tunnel_state, send_guest_probes,
-    set_relay_settings, unreachable_wireguard_tunnel, wait_for_tunnel_state,
+    self, connect_and_wait, get_tunnel_state, send_guest_probes, set_relay_settings,
+    unreachable_wireguard_tunnel, wait_for_tunnel_state,
 };
 use super::{ui, Error, TestContext};
 use crate::assert_tunnel_state;
@@ -17,7 +17,7 @@ use mullvad_types::{
 use std::net::{IpAddr, SocketAddr};
 use talpid_types::net::{Endpoint, TransportProtocol, TunnelEndpoint, TunnelType};
 use test_macro::test_function;
-use test_rpc::{Interface, ServiceClient};
+use test_rpc::ServiceClient;
 
 /// Verify that outgoing TCP, UDP, and ICMP packets can be observed
 /// in the disconnected state. The purpose is mostly to rule prevent
@@ -40,8 +40,13 @@ pub async fn test_disconnected_state(
 
     log::info!("Sending packets to {inet_destination}");
 
+    let non_tunnel_interface = rpc
+        .get_default_interface()
+        .await
+        .expect("failed to obtain non-tun interface");
+
     let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_destination).await?;
+        send_guest_probes(rpc.clone(), non_tunnel_interface, inet_destination).await?;
     assert!(
         detected_probes.all(),
         "did not see (all) outgoing packets to destination: {detected_probes:?}",
@@ -118,26 +123,31 @@ pub async fn test_connecting_state(
     // Leak test
     //
 
+    let non_tunnel_interface = rpc
+        .get_default_interface()
+        .await
+        .expect("failed to obtain non-tun interface");
+
     assert!(
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_destination)
+        send_guest_probes(rpc.clone(), non_tunnel_interface.clone(), inet_destination)
             .await?
             .none(),
         "observed unexpected outgoing packets (inet)"
     );
     assert!(
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), lan_destination)
+        send_guest_probes(rpc.clone(), non_tunnel_interface.clone(), lan_destination)
             .await?
             .none(),
         "observed unexpected outgoing packets (lan)"
     );
     assert!(
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_dns)
+        send_guest_probes(rpc.clone(), non_tunnel_interface.clone(), inet_dns)
             .await?
             .none(),
         "observed unexpected outgoing packets (DNS, inet)"
     );
     assert!(
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), lan_dns)
+        send_guest_probes(rpc.clone(), non_tunnel_interface, lan_dns)
             .await?
             .none(),
         "observed unexpected outgoing packets (DNS, lan)"
@@ -145,14 +155,6 @@ pub async fn test_connecting_state(
 
     assert_tunnel_state!(&mut mullvad_client, TunnelState::Connecting { .. });
 
-    //
-    // Disconnect
-    //
-
-    log::info!("Disconnecting");
-
-    disconnect_and_wait(&mut mullvad_client).await?;
-
     Ok(())
 }
 
@@ -201,39 +203,36 @@ pub async fn test_error_state(
     // Leak test
     //
 
+    let default_interface = rpc
+        .get_default_interface()
+        .await
+        .expect("failed to obtain non-tun interface");
+
     assert!(
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_destination)
+        send_guest_probes(rpc.clone(), default_interface.clone(), inet_destination)
             .await?
             .none(),
         "observed unexpected outgoing packets (inet)"
     );
     assert!(
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), lan_destination)
+        send_guest_probes(rpc.clone(), default_interface.clone(), lan_destination)
             .await?
             .none(),
         "observed unexpected outgoing packets (lan)"
     );
     assert!(
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_dns)
+        send_guest_probes(rpc.clone(), default_interface.clone(), inet_dns)
             .await?
             .none(),
         "observed unexpected outgoing packets (DNS, inet)"
     );
     assert!(
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), lan_dns)
+        send_guest_probes(rpc.clone(), default_interface, lan_dns)
             .await?
             .none(),
         "observed unexpected outgoing packets (DNS, lan)"
     );
 
-    //
-    // Disconnect
-    //
-
-    log::info!("Disconnecting");
-
-    disconnect_and_wait(&mut mullvad_client).await?;
-
     Ok(())
 }
 
@@ -318,11 +317,15 @@ pub async fn test_connected_state(
 
     log::info!("Test whether outgoing non-tunnel traffic is blocked");
 
-    let detected_probes =
-        send_guest_probes(rpc.clone(), Some(Interface::NonTunnel), inet_destination).await?;
+    let nontun_iface = rpc
+        .get_default_interface()
+        .await
+        .expect("failed to find non-tun interface");
+
+    let detected_probes = send_guest_probes(rpc.clone(), nontun_iface, inet_destination).await?;
     assert!(
         detected_probes.none(),
-        "observed unexpected outgoing packets"
+        "observed unexpected outgoing packets: {detected_probes:?}"
     );
 
     assert!(
@@ -330,7 +333,5 @@ pub async fn test_connected_state(
         "expected Mullvad exit IP"
     );
 
-    disconnect_and_wait(&mut mullvad_client).await?;
-
     Ok(())
 }
diff --git a/test/test-rpc/src/client.rs b/test/test-rpc/src/client.rs
index 387d0a2435..6be77afb40 100644
--- a/test/test-rpc/src/client.rs
+++ b/test/test-rpc/src/client.rs
@@ -17,8 +17,6 @@ pub struct ServiceClient {
     client: service::ServiceClient,
 }
 
-// TODO: implement wrapper methods using macro on Service trait
-
 impl ServiceClient {
     pub fn new(
         connection_handle: transport::ConnectionHandle,
@@ -156,7 +154,7 @@ impl ServiceClient {
     /// Send TCP packet
     pub async fn send_tcp(
         &self,
-        interface: Option<Interface>,
+        interface: Option<String>,
         bind_addr: SocketAddr,
         destination: SocketAddr,
     ) -> Result<(), Error> {
@@ -168,7 +166,7 @@ impl ServiceClient {
     /// Send UDP packet
     pub async fn send_udp(
         &self,
-        interface: Option<Interface>,
+        interface: Option<String>,
         bind_addr: SocketAddr,
         destination: SocketAddr,
     ) -> Result<(), Error> {
@@ -180,7 +178,7 @@ impl ServiceClient {
     /// Send ICMP
     pub async fn send_ping(
         &self,
-        interface: Option<Interface>,
+        interface: Option<String>,
         destination: IpAddr,
     ) -> Result<(), Error> {
         self.client
@@ -196,16 +194,16 @@ impl ServiceClient {
     }
 
     /// Returns the IP of the given interface.
-    pub async fn get_interface_name(&self, interface: Interface) -> Result<String, Error> {
+    pub async fn get_interface_ip(&self, interface: String) -> Result<IpAddr, Error> {
         self.client
-            .get_interface_name(tarpc::context::current(), interface)
+            .get_interface_ip(tarpc::context::current(), interface)
             .await?
     }
 
-    /// Returns the IP of the given interface.
-    pub async fn get_interface_ip(&self, interface: Interface) -> Result<IpAddr, Error> {
+    /// Returns the name of the default non-tunnel interface
+    pub async fn get_default_interface(&self) -> Result<String, Error> {
         self.client
-            .get_interface_ip(tarpc::context::current(), interface)
+            .get_default_interface(tarpc::context::current())
             .await?
     }
 
diff --git a/test/test-rpc/src/lib.rs b/test/test-rpc/src/lib.rs
index 2fd4411f49..6968a3c613 100644
--- a/test/test-rpc/src/lib.rs
+++ b/test/test-rpc/src/lib.rs
@@ -55,12 +55,6 @@ pub enum Error {
     Timeout,
 }
 
-#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Clone, Copy)]
-pub enum Interface {
-    Tunnel,
-    NonTunnel,
-}
-
 /// Response from am.i.mullvad.net
 #[derive(Debug, Serialize, Deserialize)]
 pub struct AmIMullvad {
@@ -128,29 +122,29 @@ mod service {
 
         /// Send TCP packet
         async fn send_tcp(
-            interface: Option<Interface>,
+            interface: Option<String>,
             bind_addr: SocketAddr,
             destination: SocketAddr,
         ) -> Result<(), Error>;
 
         /// Send UDP packet
         async fn send_udp(
-            interface: Option<Interface>,
+            interface: Option<String>,
             bind_addr: SocketAddr,
             destination: SocketAddr,
         ) -> Result<(), Error>;
 
         /// Send ICMP
-        async fn send_ping(interface: Option<Interface>, destination: IpAddr) -> Result<(), Error>;
+        async fn send_ping(interface: Option<String>, destination: IpAddr) -> Result<(), Error>;
 
         /// Fetch the current location.
         async fn geoip_lookup(mullvad_host: String) -> Result<AmIMullvad, Error>;
 
-        /// Returns the name of the given interface.
-        async fn get_interface_name(interface: Interface) -> Result<String, Error>;
-
         /// Returns the IP of the given interface.
-        async fn get_interface_ip(interface: Interface) -> Result<IpAddr, Error>;
+        async fn get_interface_ip(interface: String) -> Result<IpAddr, Error>;
+
+        /// Returns the name of the default interface.
+        async fn get_default_interface() -> Result<String, Error>;
 
         /// Perform DNS resolution.
         async fn resolve_hostname(hostname: String) -> Result<Vec<SocketAddr>, Error>;
diff --git a/test/test-runner/src/main.rs b/test/test-runner/src/main.rs
index 8d7991d6fa..ebf0d1e474 100644
--- a/test/test-runner/src/main.rs
+++ b/test/test-runner/src/main.rs
@@ -13,7 +13,7 @@ use test_rpc::{
     mullvad_daemon::{ServiceStatus, SOCKET_PATH},
     package::Package,
     transport::GrpcForwarder,
-    AppTrace, Interface, Service,
+    AppTrace, Service,
 };
 use tokio::sync::broadcast::error::TryRecvError;
 use tokio::{
@@ -117,7 +117,7 @@ impl Service for TestServer {
     async fn send_tcp(
         self,
         _: context::Context,
-        interface: Option<Interface>,
+        interface: Option<String>,
         bind_addr: SocketAddr,
         destination: SocketAddr,
     ) -> Result<(), test_rpc::Error> {
@@ -127,7 +127,7 @@ impl Service for TestServer {
     async fn send_udp(
         self,
         _: context::Context,
-        interface: Option<Interface>,
+        interface: Option<String>,
         bind_addr: SocketAddr,
         destination: SocketAddr,
     ) -> Result<(), test_rpc::Error> {
@@ -137,10 +137,10 @@ impl Service for TestServer {
     async fn send_ping(
         self,
         _: context::Context,
-        interface: Option<Interface>,
+        interface: Option<String>,
         destination: IpAddr,
     ) -> Result<(), test_rpc::Error> {
-        net::send_ping(interface, destination).await
+        net::send_ping(interface.as_ref().map(String::as_str), destination).await
     }
 
     async fn geoip_lookup(
@@ -165,20 +165,16 @@ impl Service for TestServer {
             .collect())
     }
 
-    async fn get_interface_name(
-        self,
-        _: context::Context,
-        interface: Interface,
-    ) -> Result<String, test_rpc::Error> {
-        Ok(net::get_interface_name(interface).to_owned())
-    }
-
     async fn get_interface_ip(
         self,
         _: context::Context,
-        interface: Interface,
+        interface: String,
     ) -> Result<IpAddr, test_rpc::Error> {
-        net::get_interface_ip(interface)
+        net::get_interface_ip(&interface).await
+    }
+
+    async fn get_default_interface(self, _: context::Context) -> Result<String, test_rpc::Error> {
+        Ok(net::get_default_interface().to_owned())
     }
 
     async fn poll_output(
diff --git a/test/test-runner/src/net.rs b/test/test-runner/src/net.rs
index 851a2f2951..f40aece4c9 100644
--- a/test/test-runner/src/net.rs
+++ b/test/test-runner/src/net.rs
@@ -2,27 +2,14 @@ use socket2::SockAddr;
 #[cfg(target_os = "macos")]
 use std::{ffi::CString, num::NonZeroU32};
 use std::{
+    io::Write,
     net::{IpAddr, SocketAddr},
     process::Output,
 };
-use test_rpc::Interface;
-use tokio::{
-    io::AsyncWriteExt,
-    net::{TcpStream, UdpSocket},
-    process::Command,
-};
-
-#[cfg(target_os = "linux")]
-const TUNNEL_INTERFACE: &str = "wg-mullvad";
-
-#[cfg(target_os = "windows")]
-const TUNNEL_INTERFACE: &str = "Mullvad";
-
-#[cfg(target_os = "macos")]
-const TUNNEL_INTERFACE: &str = "utun3";
+use tokio::process::Command;
 
 pub async fn send_tcp(
-    bind_interface: Option<Interface>,
+    bind_interface: Option<String>,
     bind_addr: SocketAddr,
     destination: SocketAddr,
 ) -> Result<(), test_rpc::Error> {
@@ -36,14 +23,7 @@ pub async fn send_tcp(
             test_rpc::Error::SendTcp
         })?;
 
-    sock.set_nonblocking(true).map_err(|error| {
-        log::error!("Failed to set non-blocking TCP socket: {error}");
-        test_rpc::Error::SendTcp
-    })?;
-
     if let Some(iface) = bind_interface {
-        let iface = get_interface_name(iface);
-
         #[cfg(target_os = "macos")]
         let interface_index = unsafe {
             let name = CString::new(iface).unwrap();
@@ -71,35 +51,32 @@ pub async fn send_tcp(
         log::trace!("Bind interface {iface} is ignored on Windows")
     }
 
-    sock.bind(&SockAddr::from(bind_addr)).map_err(|error| {
-        log::error!("Failed to bind TCP socket to {bind_addr}: {error}");
-        test_rpc::Error::SendTcp
-    })?;
-
     log::debug!("Connecting from {bind_addr} to {destination}/TCP");
 
-    sock.connect(&SockAddr::from(destination))
-        .map_err(|error| {
-            log::error!("Failed to connect to {destination}: {error}");
+    tokio::task::spawn_blocking(move || {
+        sock.bind(&SockAddr::from(bind_addr)).map_err(|error| {
+            log::error!("Failed to bind TCP socket to {bind_addr}: {error}");
             test_rpc::Error::SendTcp
         })?;
 
-    let std_stream = std::net::TcpStream::from(sock);
-    let mut stream = TcpStream::from_std(std_stream).map_err(|error| {
-        log::error!("Failed to convert to TCP stream to tokio stream: {error}");
-        test_rpc::Error::SendTcp
-    })?;
-
-    stream.write_all(b"hello").await.map_err(|error| {
-        log::error!("Failed to send message to {destination}: {error}");
-        test_rpc::Error::SendTcp
-    })?;
+        sock.connect(&SockAddr::from(destination))
+            .map_err(|error| {
+                log::error!("Failed to connect to {destination}: {error}");
+                test_rpc::Error::SendTcp
+            })?;
 
-    Ok(())
+        let mut stream = std::net::TcpStream::from(sock);
+        stream.write_all(b"hello").map_err(|error| {
+            log::error!("Failed to send message to {destination}: {error}");
+            test_rpc::Error::SendTcp
+        })
+    })
+    .await
+    .unwrap()
 }
 
 pub async fn send_udp(
-    bind_interface: Option<Interface>,
+    bind_interface: Option<String>,
     bind_addr: SocketAddr,
     destination: SocketAddr,
 ) -> Result<(), test_rpc::Error> {
@@ -113,14 +90,7 @@ pub async fn send_udp(
             test_rpc::Error::SendUdp
         })?;
 
-    sock.set_nonblocking(true).map_err(|error| {
-        log::error!("Failed to set non-blocking UDP socket: {error}");
-        test_rpc::Error::SendUdp
-    })?;
-
     if let Some(iface) = bind_interface {
-        let iface = get_interface_name(iface);
-
         #[cfg(target_os = "macos")]
         let interface_index = unsafe {
             let name = CString::new(iface).unwrap();
@@ -148,32 +118,28 @@ pub async fn send_udp(
         log::trace!("Bind interface {iface} is ignored on Windows")
     }
 
-    sock.bind(&SockAddr::from(bind_addr)).map_err(|error| {
-        log::error!("Failed to bind UDP socket to {bind_addr}: {error}");
-        test_rpc::Error::SendUdp
-    })?;
+    let _ = tokio::task::spawn_blocking(move || {
+        sock.bind(&SockAddr::from(bind_addr)).map_err(|error| {
+            log::error!("Failed to bind UDP socket to {bind_addr}: {error}");
+            test_rpc::Error::SendUdp
+        })?;
 
-    log::debug!("Send message from {bind_addr} to {destination}/UDP");
+        log::debug!("Send message from {bind_addr} to {destination}/UDP");
 
-    let std_socket = std::net::UdpSocket::from(sock);
-    let tokio_socket = UdpSocket::from_std(std_socket).map_err(|error| {
-        log::error!("Failed to convert to UDP socket to tokio socket: {error}");
-        test_rpc::Error::SendUdp
-    })?;
-
-    tokio_socket
-        .send_to(b"hello", destination)
-        .await
-        .map_err(|error| {
+        let std_socket = std::net::UdpSocket::from(sock);
+        std_socket.send_to(b"hello", destination).map_err(|error| {
             log::error!("Failed to send message to {destination}: {error}");
             test_rpc::Error::SendUdp
-        })?;
+        })
+    })
+    .await
+    .unwrap()?;
 
     Ok(())
 }
 
 pub async fn send_ping(
-    interface: Option<Interface>,
+    interface: Option<&str>,
     destination: IpAddr,
 ) -> Result<(), test_rpc::Error> {
     #[cfg(target_os = "windows")]
@@ -202,22 +168,8 @@ pub async fn send_ping(
     cmd.args(["-c", "1"]);
 
     match interface {
-        Some(Interface::Tunnel) => {
-            log::info!("Pinging {destination} in tunnel");
-
-            #[cfg(target_os = "windows")]
-            if let Some(source_ip) = source_ip {
-                cmd.args(["-S", &source_ip.to_string()]);
-            }
-
-            #[cfg(target_os = "windows")]
-            cmd.args(["-I", TUNNEL_INTERFACE]);
-
-            #[cfg(target_os = "macos")]
-            cmd.args(["-b", TUNNEL_INTERFACE]);
-        }
-        Some(Interface::NonTunnel) => {
-            log::info!("Pinging {destination} outside tunnel");
+        Some(interface) => {
+            log::info!("Pinging {destination} on interface {interface}");
 
             #[cfg(target_os = "windows")]
             if let Some(source_ip) = source_ip {
@@ -225,10 +177,10 @@ pub async fn send_ping(
             }
 
             #[cfg(target_os = "linux")]
-            cmd.args(["-I", non_tunnel_interface()]);
+            cmd.args(["-I", interface]);
 
             #[cfg(target_os = "macos")]
-            cmd.args(["-b", non_tunnel_interface()]);
+            cmd.args(["-b", interface]);
         }
         None => log::info!("Pinging {destination}"),
     }
@@ -250,18 +202,16 @@ pub async fn send_ping(
 }
 
 #[cfg(unix)]
-pub fn get_interface_ip(interface: Interface) -> Result<IpAddr, test_rpc::Error> {
+pub async fn get_interface_ip(interface: &str) -> Result<IpAddr, test_rpc::Error> {
     // TODO: IPv6
     use std::net::Ipv4Addr;
 
-    let alias = get_interface_name(interface);
-
     let addrs = nix::ifaddrs::getifaddrs().map_err(|error| {
         log::error!("Failed to obtain interfaces: {}", error);
         test_rpc::Error::Syscall
     })?;
     for addr in addrs {
-        if addr.interface_name == alias {
+        if addr.interface_name == interface {
             if let Some(address) = addr.address {
                 if let Some(sockaddr) = address.as_sockaddr_in() {
                     return Ok(IpAddr::V4(Ipv4Addr::from(sockaddr.ip())));
@@ -274,15 +224,8 @@ pub fn get_interface_ip(interface: Interface) -> Result<IpAddr, test_rpc::Error>
     Err(test_rpc::Error::InterfaceNotFound)
 }
 
-pub fn get_interface_name(interface: Interface) -> &'static str {
-    match interface {
-        Interface::Tunnel => TUNNEL_INTERFACE,
-        Interface::NonTunnel => non_tunnel_interface(),
-    }
-}
-
 #[cfg(target_os = "windows")]
-pub fn get_interface_ip(interface: Interface) -> Result<IpAddr, test_rpc::Error> {
+pub async fn get_interface_ip(interface: &str) -> Result<IpAddr, test_rpc::Error> {
     // TODO: IPv6
 
     get_interface_ip_for_family(interface, talpid_windows::net::AddressFamily::Ipv4)
@@ -292,24 +235,19 @@ pub fn get_interface_ip(interface: Interface) -> Result<IpAddr, test_rpc::Error>
 
 #[cfg(target_os = "windows")]
 fn get_interface_ip_for_family(
-    interface: Interface,
+    interface: &str,
     family: talpid_windows::net::AddressFamily,
 ) -> Result<Option<IpAddr>, ()> {
-    let interface = match interface {
-        Interface::NonTunnel => non_tunnel_interface(),
-        Interface::Tunnel => TUNNEL_INTERFACE,
-    };
-    let interface_alias = talpid_windows::net::luid_from_alias(interface).map_err(|error| {
+    let luid = talpid_windows::net::luid_from_alias(interface).map_err(|error| {
         log::error!("Failed to obtain interface LUID: {error}");
     })?;
-
-    talpid_windows::net::get_ip_address_for_interface(family, interface_alias).map_err(|error| {
+    talpid_windows::net::get_ip_address_for_interface(family, luid).map_err(|error| {
         log::error!("Failed to obtain interface IP: {error}");
     })
 }
 
 #[cfg(target_os = "windows")]
-fn non_tunnel_interface() -> &'static str {
+pub fn get_default_interface() -> &'static str {
     use once_cell::sync::OnceCell;
     use talpid_platform_metadata::WindowsVersion;
 
@@ -326,12 +264,12 @@ fn non_tunnel_interface() -> &'static str {
 }
 
 #[cfg(target_os = "linux")]
-fn non_tunnel_interface() -> &'static str {
+pub fn get_default_interface() -> &'static str {
     "ens3"
 }
 
 #[cfg(target_os = "macos")]
-fn non_tunnel_interface() -> &'static str {
+pub fn get_default_interface() -> &'static str {
     "en0"
 }