diff --git a/src/utils/mytype.rs b/src/utils/mytype.rs
index 409544a..3100214 100644
--- a/src/utils/mytype.rs
+++ b/src/utils/mytype.rs
@@ -3,3 +3,10 @@ pub type Mac = [u8; 6];
 pub const BROADCAST_MAC: Mac = [0xff, 0xff, 0xff, 0xff, 0xff, 0xff];
 pub const MULTICAST_MAC: Mac = [0x01, 0x00, 0x5E, 0x00, 0x00, 0x00]; /* First 3 bytes are meaningful */
 pub const IPV6_MULTICAST_MAC: Mac = [0x33, 0x33, 0x00, 0x00, 0x00, 0x00]; /* First 2 bytes are meaningful */
+
+pub fn mac_to_string(mac: &Mac) -> String {
+    format!(
+        "[{:02x}:{:02x}:{:02x}:{:02x}:{:02x}:{:02x}]",
+        mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]
+    )
+}