广播中如何设置白名单，根据MAC地址实现与所设定的设备连接

DW，

很简单，你可以参考一下 gap.h 中的下面定义：

/** @defgroup GAP_FILTER_POLICY_DEFINES GAP Advertiser Filter Scan Parameters
* @{
*/
#define GAP_FILTER_POLICY_ALL                       0x00 //!< Allow Scan Request from Any, Allow Connect Request from Any (default).
#define GAP_FILTER_POLICY_WHITE_SCAN    0x01 //!< Allow Scan Request from White List Only, Allow Connect from Any
#define GAP_FILTER_POLICY_WHITE_CON      0x02 //!< Allow Scan Request from Any, Connect from White List Only
#define GAP_FILTER_POLICY_WHITE                 0x03 //!< Allow Scan Request and Connect from White List Only
/** @} End GAP_FILTER_POLICY_DEFINES */

系统默认是GAP_FILTER_POLICY_ALL 的。