Implement `is_ipv6_enabled` for Windows

2 files changed, 23 insertions, 1 deletions

diff --git a/talpid-core/src/lib.rs b/talpid-core/src/lib.rs
index 55df5e135f..ecc530aec3 100644
--- a/talpid-core/src/lib.rs
+++ b/talpid-core/src/lib.rs
@@ -34,6 +34,8 @@ extern crate tokio_core;
 extern crate uuid;
 #[cfg(target_os = "linux")]
 extern crate which;
+#[cfg(windows)]
+extern crate winreg;
 
 extern crate openvpn_plugin;
 extern crate talpid_ipc;
diff --git a/talpid-core/src/tunnel/mod.rs b/talpid-core/src/tunnel/mod.rs
index 9ae88a70e9..6756f07416 100644
--- a/talpid-core/src/tunnel/mod.rs
+++ b/talpid-core/src/tunnel/mod.rs
@@ -317,5 +317,25 @@ impl CloseHandle {
 }
 
 fn is_ipv6_enabled_in_os() -> bool {
-    true
+    #[cfg(windows)]
+    {
+        use winreg::enums::*;
+        use winreg::RegKey;
+
+        const IPV6_DISABLED: u8 = 0xFF;
+
+        RegKey::predef(HKEY_LOCAL_MACHINE)
+            .open_subkey(r#"SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters"#)
+            .and_then(|ipv6_config| ipv6_config.get_value("DisabledComponents"))
+            .map(|ipv6_disabled_bits: u32| (ipv6_disabled_bits & 0xFF) == IPV6_DISABLED as u32)
+            .unwrap_or(false)
+    }
+    #[cfg(target_os = "linux")]
+    {
+        true
+    }
+    #[cfg(target_os = "macos")]
+    {
+        true
+    }
 }