《docs-05-3474-22-0csg-zigbee-specification-Revision 22 1.0-2017.pdf》

应用层APL分为APS和AF，带上一点的ZDO三个组成部分。

1、APS在AF底下一层，是NWK层与APL应用层的接口。
2、AF：包含ZCL和ZDO的服务发现部分
3、ZDO：包含address management of the device, discovery, binding, and security functions。
3.1、设备发现：IEEE address requests and NWK address requests
3.2、服务发现：match descriptor request

APS：干的活有点类似传输层，围绕数据的传输而展开工作。
1、APSDE负责将AF(ZCL)数据传递给NWK层。
2、APSME provides a variety of services to application objects including security services and binding of devices. It also maintains a database of managed objects, known as the APS information base (AIB)
3、Binding Primitives
4、Information Base Maintenance
5、Group Management

APS的结构体 aps_FrameFormat_t;

结构体afIncomingMSGPacket_t就是APS结构体中的payload的部分！！！

typedef struct
{
 uint8 FrmCtrl;
 uint8 XtndFrmCtrl;
 uint8 DstEndPoint;
 uint8 SrcEndPoint;
 uint16 GroupID;
 uint16 ClusterID;
 uint16 ProfileID;
 uint16 macDestAddr;
 uint8 wasBroadcast;
 uint8 apsHdrLen;
 uint8 *asdu;
 uint8 asduLength;
 uint8 ApsCounter;
 uint8 transID;
 uint8 BlkCount;
 uint8 AckBits;
 uint16 macSrcAddr;
} aps_FrameFormat_t;

《docs-05-3474-22-0csg-zigbee-specification-Revision 22 1.0-2017.pdf》2.4章节
ZDP的命令分为三类：
1、设备服务发现（Device and Service Discovery）
2、End Device Bind, Bind, Unbind, and Bind Management
3、Network Management 。

Device and Service Discovery的命令：

End Device Bind, Bind, Unbind, and Bind Management的命令

Network Management