From 0cec9f636f5222bb0320ca9fc946bb19f35c7ea2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C4=99drzej=20Stuczy=C5=84ski?=
 <jedrzej.stuczynski@gmail.com>
Date: Wed, 4 Oct 2023 16:41:12 +0100
Subject: [PATCH] don't build tokio-tun on non-linux targets

---
 common/wireguard/Cargo.toml |  2 ++
 common/wireguard/src/lib.rs |  2 ++
 gateway/Cargo.toml          |  2 ++
 gateway/src/node/mod.rs     | 12 +++++++++---
 4 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/common/wireguard/Cargo.toml b/common/wireguard/Cargo.toml
index 961be993c5..fe7bc887f0 100644
--- a/common/wireguard/Cargo.toml
+++ b/common/wireguard/Cargo.toml
@@ -27,4 +27,6 @@ nym-task = { path = "../task" }
 tap.workspace = true
 thiserror.workspace = true
 tokio = { workspace = true, features = ["rt-multi-thread", "net", "io-util"] }
+
+[target.'cfg(target_os = "linux")'.dependencies] 
 tokio-tun = "0.9.0"
diff --git a/common/wireguard/src/lib.rs b/common/wireguard/src/lib.rs
index 870da2da04..7afbef2e3b 100644
--- a/common/wireguard/src/lib.rs
+++ b/common/wireguard/src/lib.rs
@@ -1,3 +1,5 @@
+#![cfg(target_os = "linux")]
+
 use std::{
     net::{Ipv4Addr, SocketAddr},
     sync::Arc,
diff --git a/gateway/Cargo.toml b/gateway/Cargo.toml
index 7439ab8336..bb4a8e9c69 100644
--- a/gateway/Cargo.toml
+++ b/gateway/Cargo.toml
@@ -62,6 +62,8 @@ nym-statistics-common = { path = "../common/statistics" }
 nym-task = { path = "../common/task" }
 nym-types = { path = "../common/types" }
 nym-validator-client = { path = "../common/client-libs/validator-client" }
+
+[target.'cfg(target_os = "linux")'.dependencies]
 nym-wireguard = { path = "../common/wireguard", optional = true }
 
 [build-dependencies]
diff --git a/gateway/src/node/mod.rs b/gateway/src/node/mod.rs
index 6a59b1e3e7..8d03935e93 100644
--- a/gateway/src/node/mod.rs
+++ b/gateway/src/node/mod.rs
@@ -370,11 +370,17 @@ impl<St> Gateway<St> {
         // Once this is a bit more mature, make this a commandline flag instead of a compile time
         // flag
         #[cfg(feature = "wireguard")]
-        if let Err(err) = nym_wireguard::start_wireguard(shutdown.subscribe()).await {
-            // that's a nasty workaround, but anyhow errors are generally nicer, especially on exit
-            bail!("{err}")
+        {
+            #[cfg(target_os = "linux")]
+            if let Err(err) = nym_wireguard::start_wireguard(shutdown.subscribe()).await {
+                // that's a nasty workaround, but anyhow errors are generally nicer, especially on exit
+                bail!("{err}")
+            }
+            #[cfg(not(target_os = "linux"))]
+            panic!("wireguard is not supported on this platform")
         }
 
+
         info!("Finished nym gateway startup procedure - it should now be able to receive mix and client traffic!");
 
         if let Err(err) = Self::wait_for_interrupt(shutdown).await {