使用的SDK为simplelink_cc13xx_cc26xx_sdk_6_40_00_13
在文档simplelink_cc13xx_cc26xx_sdk_6_40_00_13/docs/zigbee/html/zigbee/z-stack-overview.html中提到，
bdbTrustCenterRequireKeyExchange¶
If BDB_DEFAULT_TC_REQUIRE_KEY_EXCHANGE in bdb_interface.h is set to TRUE, then all the joining devices are mandated to perform the TCLK exchange procedure. Devices that do not perform this procedure will be kicked out of the network after BDB_DEFAULT_TC_NODE_JOIN_TIMEOUT se
conds (15 by default). If this policy set to FALSE (default), joining devices will not be required to perform a TCLK update, but they will be allowed to do so. The TCLK exchange procedure is described in Unsecure Join to a Centralized Network.
疑问：
我现在是将宏定义 BDB_DEFAULT_TC_REQUIRE_KEY_EXCHANGE 设置为false，按我的理解，这意味着这个网络类型为 Distributed Security Network，而不是Centralized Security Network，
这也意味着子设备加入网络时，在Transport Key这个步骤，64bit source address应为0xff，代表网络类型为Distributed Security Network；并且子设备入网后，无TCLK update操作，也即没有node descriptor request，request key, transport key, verify key这个步骤
但根抓包情况来看，在Transport Key这个步骤，64bit source address为真实的地址，并且也有TCLK update操作。
那么，到底是我理解有错误，还是SDK有BUG呢？
