[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>

Author: 2 people

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)
 {