refactor basic

WIP

src/commonMain/kotlin/cn/rtast/nmdns/util/mac.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright © 2025 RTAkland
+ * Author: RTAkland
+ * Date: 9/29/25
+ */
+
+
+package cn.rtast.nmdns.util
+
+import kotlin.experimental.ExperimentalNativeApi
+import kotlin.random.Random
+
+/**
+ * generate random mac address
+ */
+@OptIn(ExperimentalNativeApi::class)
+public fun randomMacAddress(): String {
+    val bytes = ByteArray(6) { Random.nextInt(0, 256).toByte() }
+    return bytes.joinToString(":") { it.toHexString() }
+}