[nrf fromtree][TCR] Extended Announcement additions (#31532)

* additions to support changes as discussed in connectedhomeip-spec #7825

* add Silabs platform example implementation

* add extension for ExtendedAnnouncementFlag + Silabs platform usage

* Restyled by clang-format

* adjust based on review comments - 1

* Restyled by clang-format

* add missing include guard for default case

* Revert "Restyled by clang-format"

This reverts commit 6d3f9e107de9a8421524437f44c2113730e52e54.

* fix extra bracket causing a bug + restyle changes

* Restyled by clang-format

* adjust based on review comments - 2

* Restyled by clang-format

---------

Cherry picked from: ca17912

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

Author: 2 people

src/app/server/CommissioningWindowManager.h

@@ -59,8 +59,13 @@ class CommissioningWindowManager : public Messaging::UnsolicitedMessageHandler,
 
     static constexpr System::Clock::Seconds16 MaxCommissioningTimeout()
     {
+#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+        // Specification section 2.3.1 - Extended Announcement Duration up to 48h
+        return System::Clock::Seconds16(60 * 60 * 48);
+#else
         // Specification section 5.4.2.3. Announcement Duration says 15 minutes.
         return System::Clock::Seconds16(15 * 60);
+#endif
     }
 
     System::Clock::Seconds16 MinCommissioningTimeout() const

src/ble/CHIPBleServiceData.h

@@ -47,6 +47,7 @@ struct ChipBLEDeviceIdentificationInfo
 {
     constexpr static uint16_t kDiscriminatorMask            = 0xfff;
     constexpr static uint8_t kAdditionalDataFlagMask        = 0x1;
+    constexpr static uint8_t kExtendedAnnouncementFlagMask  = 0x2;
     constexpr static uint8_t kAdvertisementVersionMask      = 0xf0;
     constexpr static uint8_t kAdvertisementVersionShiftBits = 4u;
 
@@ -112,6 +113,19 @@ struct ChipBLEDeviceIdentificationInfo
             AdditionalDataFlag &= static_cast<uint8_t>(~kAdditionalDataFlagMask);
         }
     }
+
+    void SetExtendedAnnouncementFlag(bool flag)
+    {
+        if (flag)
+        {
+            AdditionalDataFlag |= kExtendedAnnouncementFlagMask;
+        }
+        else
+        {
+            AdditionalDataFlag &= static_cast<uint8_t>(~kExtendedAnnouncementFlagMask);
+        }
+    }
+
 } __attribute__((packed));
 
 } /* namespace Ble */

src/include/platform/CHIPDeviceConfig.h

@@ -595,6 +595,61 @@
 #define CHIP_DEVICE_CONFIG_BLE_ADVERTISING_INTERVAL_CHANGE_TIME 30000
 #endif
 
+/**
+ * CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+ *
+ * Optional configuration to enable Extended Announcement Duration up to 48h.
+ * Should be used together with extending CHIP_DEVICE_CONFIG_DISCOVERY_TIMEOUT_SECS past 15 minutes.
+ * Disabled by default.
+ */
+
+#ifndef CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+#define CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING 0
+#endif
+
+#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+
+/**
+ * CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_CHANGE_TIME_MS
+ *
+ * The amount of time in miliseconds after which BLE advertisement should be switched from the slow
+ * advertising to the extended advertising, counting from the moment of advertisement commencement.
+ *
+ *  Defaults to 900000 ms.
+ */
+#ifndef CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_CHANGE_TIME_MS
+#define CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_CHANGE_TIME_MS (15 * 60 * 1000)
+#endif
+
+/**
+ * CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MIN
+ *
+ * The minimum interval (in units of 0.625ms) at which the device will send BLE advertisements while
+ * in the extended advertising mode. The minimum interval shall not be smaller than the default value
+ * and should not be equal to the CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MAX.
+ *
+ * Defaults to 1920 (1200 ms).
+ */
+#define CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MIN 1920
+
+/**
+ * CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MAX
+ *
+ * The maximum interval (in units of 0.625ms) at which the device will send BLE advertisements while
+ * in the extended advertising mode. The maximum interval should be greater and not equal to the
+ * CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MIN.
+ *
+ * Defaults to 1936 (1210 ms).
+ */
+#ifndef CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MAX
+#define CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MAX 1936
+#endif
+
+static_assert(CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MIN < CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MAX,
+              "Max Extended Advertising Interval cannot be smaller or equal to the Min Extended Advertising Interval");
+
+#endif
+
 // -------------------- Service Provisioning Configuration --------------------
 
 /**

src/platform/silabs/BLEManagerImpl.h

@@ -152,6 +152,7 @@ class BLEManagerImpl final : public BLEManager, private BleLayer, private BlePla
         kRestartAdvertising     = 0x0008,
         kEFRBLEStackInitialized = 0x0010,
         kDeviceNameSet          = 0x0020,
+        kExtAdvertisingEnabled  = 0x0040,
     };
 
     enum

src/platform/silabs/efr32/BLEManagerImpl.cpp

@@ -457,6 +457,17 @@ CHIP_ERROR BLEManagerImpl::ConfigureAdvertisingData(void)
     advData[index++] = CHIP_ADV_DATA_TYPE_SERVICE_DATA;                                         // AD type : Service Data
     advData[index++] = ShortUUID_CHIPoBLEService[0];                                            // AD value
     advData[index++] = ShortUUID_CHIPoBLEService[1];
+
+#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+    // Check for extended advertisement interval and redact VID/PID if past the initial period.
+    if (mFlags.Has(Flags::kExtAdvertisingEnabled))
+    {
+        mDeviceIdInfo.SetVendorId(0);
+        mDeviceIdInfo.SetProductId(0);
+        mDeviceIdInfo.SetExtendedAnnouncementFlag(true);
+    }
+#endif
+
     memcpy(&advData[index], (void *) &mDeviceIdInfo, mDeviceIdInfoLength); // AD value
     index += mDeviceIdInfoLength;
 
@@ -553,8 +564,21 @@ CHIP_ERROR BLEManagerImpl::StartAdvertising(void)
     }
     else
     {
+#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+        if (!mFlags.Has(Flags::kExtAdvertisingEnabled))
+        {
+            interval_min = CHIP_DEVICE_CONFIG_BLE_SLOW_ADVERTISING_INTERVAL_MIN;
+            interval_max = CHIP_DEVICE_CONFIG_BLE_SLOW_ADVERTISING_INTERVAL_MAX;
+        }
+        else
+        {
+            interval_min = CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MIN;
+            interval_max = CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_MAX;
+        }
+#else
         interval_min = CHIP_DEVICE_CONFIG_BLE_SLOW_ADVERTISING_INTERVAL_MIN;
         interval_max = CHIP_DEVICE_CONFIG_BLE_SLOW_ADVERTISING_INTERVAL_MAX;
+#endif
     }
 
     ret = sl_bt_advertiser_set_timing(advertising_set_handle, interval_min, interval_max, 0, 0);
@@ -952,8 +976,22 @@ void BLEManagerImpl::BleAdvTimeoutHandler(TimerHandle_t xTimer)
     if (BLEMgrImpl().mFlags.Has(Flags::kFastAdvertisingEnabled))
     {
         ChipLogDetail(DeviceLayer, "bleAdv Timeout : Start slow advertissment");
+        BLEMgrImpl().mFlags.Set(Flags::kAdvertising);
+        BLEMgr().SetAdvertisingMode(BLEAdvertisingMode::kSlowAdvertising);
+#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+        BLEMgrImpl().mFlags.Clear(Flags::kExtAdvertisingEnabled);
+        BLEMgrImpl().StartBleAdvTimeoutTimer(CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING_INTERVAL_CHANGE_TIME_MS);
+#endif
+    }
+#if CHIP_DEVICE_CONFIG_BLE_EXT_ADVERTISING
+    else
+    {
+        ChipLogDetail(DeviceLayer, "bleAdv Timeout : Start extended advertisment");
+        BLEMgrImpl().mFlags.Set(Flags::kAdvertising);
+        BLEMgrImpl().mFlags.Set(Flags::kExtAdvertisingEnabled);
         BLEMgr().SetAdvertisingMode(BLEAdvertisingMode::kSlowAdvertising);
     }
+#endif
 }
 
 void BLEManagerImpl::CancelBleAdvTimeoutTimer(void)