hysteria 2 prototype first public release

core/internal/pmtud/unavail.go

@@ -0,0 +1,12 @@
+//go:build !linux && !windows
+
+package pmtud
+
+// quic-go's MTU discovery is enabled by default across all platforms. However, our testing has found that on certain
+// platforms (e.g. macOS) the DF bit is not set. As a result, probe packets that should never be fragmented are still
+// fragmented and transmitted. So we have decided to enable MTU discovery only on Linux and Windows for now, as we have
+// verified its functionality on these platforms.
+
+const (
+	DisablePathMTUDiscovery = true
+)