[Silabs] [EFR32] Random BLE address changes on every boot for RS9116 …

…and 917 SoC BLE (#26518)

* Added chnages for ble random address

* Added changes for genrating random number on every boot

* Restyled by clang-format

* Adds changes for random number and resolved comment

* removed the additional logic for random number genrator

* Restyled by clang-format

* Added changes for the ble address lenght

* Adds changes for advertisement minimum and maximum value

* Adds chnages for the random address genration for BLE

* changed the name of the BLE address variable

* Restyled by clang-format

---------

Co-authored-by: Restyled.io <commits@restyled.io>

src/platform/silabs/BLEManagerImpl.h

@@ -72,6 +72,7 @@ class BLEManagerImpl final : public BLEManager, private BleLayer, private BlePla
  void HandleTxConfirmationEvent(BLE_CONNECTION_OBJECT conId);
  void HandleTXCharCCCDWrite(rsi_ble_event_write_t * evt);
  void HandleSoftTimerEvent(void);
+ int32_t SendBLEAdvertisementCommand(void);
 #else
  void HandleConnectEvent(volatile sl_bt_msg_t * evt);
  void HandleConnectionCloseEvent(volatile sl_bt_msg_t * evt);

src/platform/silabs/rs911x/BLEManagerImpl.cpp

@@ -31,7 +31,7 @@
 #ifndef SIWX_917
 #include "rail.h"
 #endif
-
+#include <crypto/RandUtils.h>
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -77,6 +77,8 @@ using namespace ::chip::DeviceLayer::Internal;
 
 void sl_ble_init()
 {
+ uint8_t randomAddrBLE[6] = { 0 };
+ uint64_t randomAddr = chip::Crypto::GetRandU64();
 
  // registering the GAP callback functions
  rsi_ble_gap_register_callbacks(NULL, NULL, rsi_ble_on_disconnect_event, NULL, NULL, NULL, rsi_ble_on_enhance_conn_status_event,
@@ -88,10 +90,13 @@ void sl_ble_init()
  rsi_ble_on_event_indication_confirmation, NULL);
 
  // Exchange of GATT info with BLE stack
+
  rsi_ble_add_matter_service();
 
  // initializing the application events map
  rsi_ble_app_init_events();
+ memcpy(randomAddrBLE, &randomAddr, 6);
+ rsi_ble_set_random_address_with_value(randomAddrBLE);
  chip::DeviceLayer::Internal::BLEMgrImpl().HandleBootEvent();
 }
 
@@ -621,8 +626,8 @@ CHIP_ERROR BLEManagerImpl::StartAdvertising(void)
  sl_wfx_mac_address_t macaddr;
  wfx_get_wifi_mac_addr(SL_WFX_STA_INTERFACE, &macaddr);
 
- //! Set local name
- status = rsi_ble_start_advertising();
+ status = sInstance.SendBLEAdvertisementCommand();
+
  if (status == RSI_SUCCESS)
  {
  ChipLogProgress(DeviceLayer, "rsi_ble_start_advertising Success");
@@ -643,6 +648,24 @@ CHIP_ERROR BLEManagerImpl::StartAdvertising(void)
  return CHIP_NO_ERROR; // err;
 }
 
+int32_t BLEManagerImpl::SendBLEAdvertisementCommand(void)
+{
+
+ rsi_ble_req_adv_t ble_adv = { 0 };
+
+ ble_adv.status = RSI_BLE_START_ADV;
+
+ ble_adv.adv_type = RSI_BLE_ADV_TYPE;
+ ble_adv.filter_type = RSI_BLE_ADV_FILTER_TYPE;
+ ble_adv.direct_addr_type = RSI_BLE_ADV_DIR_ADDR_TYPE;
+ rsi_ascii_dev_address_to_6bytes_rev(ble_adv.direct_addr, (int8_t *) RSI_BLE_ADV_DIR_ADDR);
+ ble_adv.adv_int_min = RSI_BLE_ADV_INT_MIN;
+ ble_adv.adv_int_max = RSI_BLE_ADV_INT_MAX;
+ ble_adv.own_addr_type = LE_RANDOM_ADDRESS;
+ ble_adv.adv_channel_map = RSI_BLE_ADV_CHANNEL_MAP;
+ return rsi_ble_start_advertising_with_values(&ble_adv);
+}
+
 // TODO:: Implementation need to be done.
 CHIP_ERROR BLEManagerImpl::StopAdvertising(void)
 {