initial: ZeroTier-like P2P mesh VPN server with multi-tenant Web UI

internal/tap/tap_stub.go

@@ -0,0 +1,21 @@
+//go:build !linux
+
+package tap
+
+import "fmt"
+
+func openTap(_ string, _ int) (*Interface, error) {
+	return nil, fmt.Errorf("TAP devices are only supported on Linux")
+}
+
+func readBuf(_ int, _ []byte) (int, error) {
+	return 0, fmt.Errorf("not supported")
+}
+
+func writeBuf(_ int, _ []byte) (int, error) {
+	return 0, fmt.Errorf("not supported")
+}
+
+func closeFD(_ int) error {
+	return fmt.Errorf("not supported")
+}