AUDIT changes

peer/multicast/broadcaster.go

@@ -44,7 +44,7 @@ func broadcastInner(selfVPNIP netip.Addr, pubKey wgtypes.Key, wgPort uint16, sig
 	// dropped by receivers' freshness gate.
 	send := func() error {
 		packet.Timestamp = time.Now().Unix()
-		payload := packet.Marshal(buf, signKey)
+		payload := packet.marshal(buf, signKey)
 		_, err := conn.WriteToUDP(payload, addr)
 		return err
 	}