[Tizen] Implement ScanNetworks. (#27623)

* [Tizen] Implement ScanNetworks

This pacth:
-> Implements ScanNetworks function.
-> Implements callback functions related to the ScanNetworks.
-> Implements Count and Next function.
-> Resolve race condition in ble-wifi commissioning.

Signed-off-by: Akash Kumar <[email protected]>

* Update src/platform/Tizen/WiFiManager.cpp

Co-authored-by: Arkadiusz Bokowy <[email protected]>

* Implement ScanNetworks

This pacth:
-> Implements ScanNetworks function.
-> Implements callback functions related to the ScanNetworks.
-> Implements Count and Next function.
-> Resolve race condition in ble-wifi commissioning.

Signed-off-by: Akash Kumar <[email protected]>

* Update error handling

Signed-off-by: Akash Kumar <[email protected]>

---------

Signed-off-by: Akash Kumar <[email protected]>
Co-authored-by: Justin Wood <[email protected]>
Co-authored-by: Arkadiusz Bokowy <[email protected]>

src/platform/Tizen/BLEManagerImpl.cpp

@@ -510,7 +510,9 @@ void BLEManagerImpl::OnChipDeviceScanned(void * device, const Ble::ChipBLEDevice
 
     /* Set CHIP Connecting state */
     mBLEScanConfig.mBleScanState = BleScanState::kConnecting;
+    chip::DeviceLayer::PlatformMgr().LockChipStack();
     DeviceLayer::SystemLayer().StartTimer(kConnectTimeout, HandleConnectionTimeout, nullptr);
+    chip::DeviceLayer::PlatformMgr().UnlockChipStack();
     mDeviceScanner->StopChipScan();
 
     /* Initiate Connect */

src/platform/Tizen/NetworkCommissioningDriver.h

@@ -26,6 +26,33 @@ namespace chip {
 namespace DeviceLayer {
 namespace NetworkCommissioning {
 
+template <typename T>
+class TizenScanResponseIterator : public Iterator<T>
+{
+public:
+    TizenScanResponseIterator(std::vector<T> * apScanResponse) : mpScanResponse(apScanResponse) {}
+    size_t Count() override { return mpScanResponse != nullptr ? mpScanResponse->size() : 0; }
+    bool Next(T & item) override
+    {
+        if (mpScanResponse == nullptr || currentIterating >= mpScanResponse->size())
+        {
+            return false;
+        }
+        item = (*mpScanResponse)[currentIterating];
+        currentIterating++;
+        return true;
+    }
+    void Release() override
+    { /* nothing to do, we don't hold the ownership of the vector, and users is not expected to hold the ownership in OnFinished for
+         scan. */
+    }
+
+private:
+    size_t currentIterating = 0;
+    // Note: We cannot post a event in ScheduleLambda since std::vector is not trivial copyable.
+    std::vector<T> * mpScanResponse;
+};
+
 #if CHIP_DEVICE_CONFIG_ENABLE_WIFI
 class TizenWiFiDriver final : public WiFiDriver
 {

src/platform/Tizen/NetworkCommissioningWiFiDriver.cpp

@@ -161,19 +161,41 @@ void TizenWiFiDriver::ConnectNetwork(ByteSpan networkId, ConnectCallback * callb
 
 void TizenWiFiDriver::ScanNetworks(ByteSpan ssid, WiFiDriver::ScanCallback * callback)
 {
-    ChipLogError(NetworkProvisioning, "Not implemented");
+    CHIP_ERROR err = DeviceLayer::Internal::WiFiMgr().StartWiFiScan(ssid, callback);
+    if (err != CHIP_NO_ERROR)
+    {
+        callback->OnFinished(Status::kUnknownError, CharSpan(), nullptr);
+    }
 }
 
 size_t TizenWiFiDriver::WiFiNetworkIterator::Count()
 {
-    ChipLogError(NetworkProvisioning, "Not implemented");
-    return 0;
+    return driver->mStagingNetwork.ssidLen == 0 ? 0 : 1;
 }
 
 bool TizenWiFiDriver::WiFiNetworkIterator::Next(Network & item)
 {
-    ChipLogError(NetworkProvisioning, "Not implemented");
-    return false;
+    if (exhausted || driver->mStagingNetwork.ssidLen == 0)
+    {
+        return false;
+    }
+    memcpy(item.networkID, driver->mStagingNetwork.ssid, driver->mStagingNetwork.ssidLen);
+    item.networkIDLen = driver->mStagingNetwork.ssidLen;
+    item.connected    = false;
+    exhausted         = true;
+
+    Network configuredNetwork;
+    CHIP_ERROR err = DeviceLayer::Internal::WiFiMgr().GetConfiguredNetwork(configuredNetwork);
+    if (err == CHIP_NO_ERROR)
+    {
+        if (DeviceLayer::Internal::WiFiMgr().IsWiFiStationConnected() && configuredNetwork.networkIDLen == item.networkIDLen &&
+            memcmp(configuredNetwork.networkID, item.networkID, item.networkIDLen) == 0)
+        {
+            item.connected = true;
+        }
+    }
+
+    return true;
 }
 
 #endif // CHIP_DEVICE_CONFIG_ENABLE_WIFI