With UDP

core/internal/protocol/xor_generic.go

@@ -0,0 +1,10 @@
+//go:build !amd64 && !arm64 && !arm && !386
+
+package protocol
+
+// Generic fallback for 32-bit and uncommon architectures.
+func XorInPlace(b []byte) {
+	for i := range b {
+		b[i] ^= XORKey
+	}
+}