examples/fabric-admin/device_manager/DeviceManager.cpp - third_party/github/project-chip/connectedhomeip - Git at Google

 /*
  *
  *    Copyright (c) 2024 Project CHIP Authors
  *    All rights reserved.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
  *    You may obtain a copy of the License at
  *
  *        http://www.apache.org/licenses/LICENSE-2.0
  *
  *    Unless required by applicable law or agreed to in writing, software
  *    distributed under the License is distributed on an "AS IS" BASIS,
  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *    See the License for the specific language governing permissions and
  *    limitations under the License.
  */

 #include "DeviceManager.h"

 #include <commands/interactive/InteractiveCommands.h>
 #include <crypto/RandUtils.h>
 #include <lib/support/StringBuilder.h>

 #include <cstdio>
 #include <string>

 using namespace chip;
 using namespace chip::app::Clusters;

 namespace {

 constexpr uint16_t kWindowTimeout              = 300;
 constexpr uint16_t kIteration                  = 1000;
 constexpr uint16_t kSubscribeMinInterval       = 0;
 constexpr uint16_t kSubscribeMaxInterval       = 60;
 constexpr uint16_t kAggragatorEndpointId       = 1;
 constexpr uint16_t kMaxDiscriminatorLength     = 4095;
 constexpr uint8_t kEnhancedCommissioningMethod = 1;

 } // namespace

 // Define the static member
 DeviceManager DeviceManager::sInstance;

 void DeviceManager::Init()
 {
     // TODO: (#34113) Init mLastUsedNodeId from chip config file
     mLastUsedNodeId = 1;
 }

 NodeId DeviceManager::GetNextAvailableNodeId()
 {
     mLastUsedNodeId++;
     VerifyOrDieWithMsg(mLastUsedNodeId < std::numeric_limits<NodeId>::max(), NotSpecified, "No more available NodeIds.");

     return mLastUsedNodeId;
 }

 void DeviceManager::UpdateLastUsedNodeId(NodeId nodeId)
 {
     if (nodeId > mLastUsedNodeId)
     {
         ChipLogProgress(NotSpecified, "Updating last used NodeId to " ChipLogFormatX64, ChipLogValueX64(nodeId));
         mLastUsedNodeId = nodeId;
     }
 }

 void DeviceManager::AddSyncedDevice(const Device & device)
 {
     mSyncedDevices.insert(device);
     ChipLogProgress(NotSpecified, "Added synced device: NodeId:" ChipLogFormatX64 ", EndpointId %u",
                     ChipLogValueX64(device.GetNodeId()), device.GetEndpointId());
 }

 Device * DeviceManager::FindDeviceByEndpoint(EndpointId endpointId)
 {
     for (auto & device : mSyncedDevices)
     {
         if (device.GetEndpointId() == endpointId)
         {
             return const_cast<Device *>(&device);
         }
     }
     return nullptr;
 }

 Device * DeviceManager::FindDeviceByNode(NodeId nodeId)
 {
     for (auto & device : mSyncedDevices)
     {
         if (device.GetNodeId() == nodeId)
         {
             return const_cast<Device *>(&device);
         }
     }
     return nullptr;
 }

 void DeviceManager::RemoveSyncedDevice(NodeId nodeId)
 {
     Device * device = FindDeviceByNode(nodeId);
     if (device == nullptr)
     {
         ChipLogProgress(NotSpecified, "No device found with NodeId:" ChipLogFormatX64, ChipLogValueX64(nodeId));
         return;
     }

     mSyncedDevices.erase(*device);
     ChipLogProgress(NotSpecified, "Removed synced device: NodeId:" ChipLogFormatX64 ", EndpointId %u",
                     ChipLogValueX64(device->GetNodeId()), device->GetEndpointId());
 }

 void DeviceManager::OpenDeviceCommissioningWindow(NodeId nodeId, uint32_t commissioningTimeout, uint32_t iterations,
                                                   uint32_t discriminator, const char * saltHex, const char * verifierHex)
 {
     ChipLogProgress(NotSpecified, "Open the commissioning window of device with NodeId:" ChipLogFormatX64, ChipLogValueX64(nodeId));

     // Open the commissioning window of a device within its own fabric.
     StringBuilder<kMaxCommandSize> commandBuilder;

     commandBuilder.Add("pairing open-commissioning-window ");
     commandBuilder.AddFormat("%lu %d %d %d %d %d --salt hex:%s --verifier hex:%s", nodeId, kRootEndpointId,
                              kEnhancedCommissioningMethod, commissioningTimeout, iterations, discriminator, saltHex, verifierHex);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::OpenRemoteDeviceCommissioningWindow(EndpointId remoteEndpointId)
 {
     // Open the commissioning window of a device from another fabric via its fabric bridge.
     // This method constructs and sends a command to open the commissioning window for a device
     // that is part of a different fabric, accessed through a fabric bridge.
     StringBuilder<kMaxCommandSize> commandBuilder;

     // Use random discriminator to have less chance of collision.
     uint16_t discriminator =
         Crypto::GetRandU16() % (kMaxDiscriminatorLength + 1); // Include the upper limit kMaxDiscriminatorLength

     commandBuilder.Add("pairing open-commissioning-window ");
     commandBuilder.AddFormat("%lu %d %d %d %d %d", mRemoteBridgeNodeId, remoteEndpointId, kEnhancedCommissioningMethod,
                              kWindowTimeout, kIteration, discriminator);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::PairRemoteFabricBridge(chip::NodeId nodeId, uint32_t setupPINCode, const char * deviceRemoteIp,
                                            uint16_t deviceRemotePort)
 {
     StringBuilder<kMaxCommandSize> commandBuilder;

     commandBuilder.Add("pairing already-discovered ");
     commandBuilder.AddFormat("%lu %d %s %d", nodeId, setupPINCode, deviceRemoteIp, deviceRemotePort);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::PairRemoteDevice(NodeId nodeId, const char * payload)
 {
     StringBuilder<kMaxCommandSize> commandBuilder;

     commandBuilder.Add("pairing code ");
     commandBuilder.AddFormat("%lu %s", nodeId, payload);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::PairLocalFabricBridge(NodeId nodeId)
 {
     StringBuilder<kMaxCommandSize> commandBuilder;

     commandBuilder.Add("pairing already-discovered ");
     commandBuilder.AddFormat("%lu %d ::1 %d", nodeId, mLocalBridgeSetupPinCode, mLocalBridgePort);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::UnpairRemoteFabricBridge()
 {
     StringBuilder<kMaxCommandSize> commandBuilder;

     commandBuilder.Add("pairing unpair ");
     commandBuilder.AddFormat("%lu", mRemoteBridgeNodeId);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::UnpairLocalFabricBridge()
 {
     StringBuilder<kMaxCommandSize> commandBuilder;

     commandBuilder.Add("pairing unpair ");
     commandBuilder.AddFormat("%lu", mLocalBridgeNodeId);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::SubscribeRemoteFabricBridge()
 {
     // Listen to the state changes of the remote fabric bridge.
     StringBuilder<kMaxCommandSize> commandBuilder;

     // Prepare and push the descriptor subscribe command
     commandBuilder.Add("descriptor subscribe parts-list ");
     commandBuilder.AddFormat("%d %d %lu %d", kSubscribeMinInterval, kSubscribeMaxInterval, mRemoteBridgeNodeId,
                              kAggragatorEndpointId);
     PushCommand(commandBuilder.c_str());

     // Clear the builder for the next command
     commandBuilder.Reset();

     // Prepare and push the commissioner control subscribe command
     commandBuilder.Add("commissionercontrol subscribe-event commissioning-request-result ");
     commandBuilder.AddFormat("%d %d %lu %d --is-urgent true --keepSubscriptions true", kSubscribeMinInterval, kSubscribeMaxInterval,
                              mRemoteBridgeNodeId, kRootEndpointId);
     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::ReadSupportedDeviceCategories()
 {
     if (!IsFabricSyncReady())
     {
         // print to console
         fprintf(stderr, "Remote Fabric Bridge is not configured yet.\n");
         return;
     }

     StringBuilder<kMaxCommandSize> commandBuilder;

     commandBuilder.Add("commissionercontrol read supported-device-categories ");
     commandBuilder.AddFormat("%ld ", mRemoteBridgeNodeId);
     commandBuilder.AddFormat("%d", kRootEndpointId);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::HandleReadSupportedDeviceCategories(chip::TLV::TLVReader & data)
 {
     ChipLogProgress(NotSpecified, "Attribute SupportedDeviceCategories detected.");

     BitMask<CommissionerControl::SupportedDeviceCategoryBitmap> value;
     CHIP_ERROR error = app::DataModel::Decode(data, value);
     if (error != CHIP_NO_ERROR)
     {
         ChipLogError(NotSpecified, "Failed to decode attribute value. Error: %" CHIP_ERROR_FORMAT, error.Format());
         return;
     }

     if (value.Has(CommissionerControl::SupportedDeviceCategoryBitmap::kFabricSynchronization))
     {
         ChipLogProgress(NotSpecified, "Remote Fabric-Bridge supports Fabric Synchronization, start reverse commissioning.");
         RequestCommissioningApproval();
     }
 }

 void DeviceManager::RequestCommissioningApproval()
 {
     ChipLogProgress(NotSpecified, "Starting reverse commissioning for bridge device: NodeId: " ChipLogFormatX64,
                     ChipLogValueX64(mRemoteBridgeNodeId));

     uint64_t requestId = Crypto::GetRandU64();
     uint16_t vendorId  = static_cast<uint16_t>(CHIP_DEVICE_CONFIG_DEVICE_VENDOR_ID);
     uint16_t productId = static_cast<uint16_t>(CHIP_DEVICE_CONFIG_DEVICE_PRODUCT_ID);

     StringBuilder<kMaxCommandSize> commandBuilder;
     commandBuilder.Add("commissionercontrol request-commissioning-approval ");
     commandBuilder.AddFormat("%lu %u %u %lu %d", requestId, vendorId, productId, mRemoteBridgeNodeId, kRootEndpointId);

     mRequestId = requestId;
     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::HandleCommissioningRequestResult(TLV::TLVReader & data)
 {
     ChipLogProgress(NotSpecified, "CommissioningRequestResult event received.");

     CommissionerControl::Events::CommissioningRequestResult::DecodableType value;
     CHIP_ERROR error = app::DataModel::Decode(data, value);
     if (error != CHIP_NO_ERROR)
     {
         ChipLogError(NotSpecified, "Failed to decode event value. Error: %" CHIP_ERROR_FORMAT, error.Format());
         return;
     }

     if (value.requestID != mRequestId)
     {
         ChipLogError(NotSpecified, "The RequestId does not match the RequestId provided to RequestCommissioningApproval");
         return;
     }

     if (value.statusCode != static_cast<uint8_t>(Protocols::InteractionModel::Status::Success))
     {
         ChipLogError(NotSpecified, "The server is not ready to begin commissioning the requested device");
         return;
     }

     // The server is ready to begin commissioning the requested device, request the Commissioner Control Server to begin
     // commissioning a previously approved request.
     SendCommissionNodeRequest(value.requestID, kResponseTimeoutSeconds);
 }

 void DeviceManager::HandleAttributePartsListUpdate(chip::TLV::TLVReader & data)
 {
     ChipLogProgress(NotSpecified, "Attribute PartsList change detected:");

     app::DataModel::DecodableList<EndpointId> value;
     CHIP_ERROR error = app::DataModel::Decode(data, value);
     if (error != CHIP_NO_ERROR)
     {
         ChipLogError(NotSpecified, "Failed to decode attribute value. Error: %" CHIP_ERROR_FORMAT, error.Format());
         return;
     }

     std::set<EndpointId> newEndpoints;

     // Populate the newEndpoints set from the decoded value using an iterator
     auto iter = value.begin();
     while (iter.Next())
     {
         newEndpoints.insert(iter.GetValue());
     }

     if (iter.GetStatus() != CHIP_NO_ERROR)
     {
         ChipLogError(NotSpecified, "Failed to iterate over decoded attribute value.");
         return;
     }

     // Compare newEndpoints with mSyncedDevices to determine added and removed endpoints
     std::vector<EndpointId> addedEndpoints;
     std::vector<EndpointId> removedEndpoints;

     // Note: We're using vectors and manual searches instead of set operations
     // because we need to work with the Device objects in mSyncedDevices,
     // not just their EndpointIds. This approach allows us to access the full
     // Device information when processing changes.

     // Find added endpoints
     for (const auto & endpoint : newEndpoints)
     {
         if (FindDeviceByEndpoint(endpoint) == nullptr)
         {
             addedEndpoints.push_back(endpoint);
         }
     }

     // Find removed endpoints
     for (auto & device : mSyncedDevices)
     {
         EndpointId endpointId = device.GetEndpointId();
         if (newEndpoints.find(endpointId) == newEndpoints.end())
         {
             removedEndpoints.push_back(endpointId);
         }
     }

     // Process added endpoints
     for (const auto & endpoint : addedEndpoints)
     {
         // print to console
         fprintf(stderr, "A new device is added on Endpoint: %u\n", endpoint);

         if (mAutoSyncEnabled)
         {
             StringBuilder<kMaxCommandSize> commandBuilder;
             commandBuilder.Add("fabricsync sync-device ");
             commandBuilder.AddFormat("%d", endpoint);
             PushCommand(commandBuilder.c_str());
         }
     }

     // Process removed endpoints
     for (const auto & endpoint : removedEndpoints)
     {
         ChipLogProgress(NotSpecified, "Endpoint removed: %u", endpoint);

         Device * device = FindDeviceByEndpoint(endpoint);

         if (device == nullptr)
         {
             ChipLogProgress(NotSpecified, "No device on Endpoint: %u", endpoint);
             continue;
         }

         if (mAutoSyncEnabled)
         {
             StringBuilder<kMaxCommandSize> commandBuilder;
             commandBuilder.Add("pairing unpair ");
             commandBuilder.AddFormat("%lu", device->GetNodeId());

             PairingCommand * pairingCommand = static_cast<PairingCommand *>(CommandMgr().GetCommandByName("pairing", "unpair"));

             if (pairingCommand == nullptr)
             {
                 ChipLogError(NotSpecified, "Pairing code command is not available");
                 return;
             }

             pairingCommand->RegisterPairingDelegate(this);
             PushCommand(commandBuilder.c_str());
         }
     }
 }

 void DeviceManager::SendCommissionNodeRequest(uint64_t requestId, uint16_t responseTimeoutSeconds)
 {
     ChipLogProgress(NotSpecified, "Request the Commissioner Control Server to begin commissioning a previously approved request.");

     StringBuilder<kMaxCommandSize> commandBuilder;
     commandBuilder.Add("commissionercontrol commission-node ");
     commandBuilder.AddFormat("%lu %u %lu %d", requestId, responseTimeoutSeconds, mRemoteBridgeNodeId, kRootEndpointId);

     PushCommand(commandBuilder.c_str());
 }

 void DeviceManager::HandleReverseOpenCommissioningWindow(TLV::TLVReader & data)
 {
     CommissionerControl::Commands::ReverseOpenCommissioningWindow::DecodableType value;
     CHIP_ERROR error = app::DataModel::Decode(data, value);
     if (error != CHIP_NO_ERROR)
     {
         ChipLogError(NotSpecified, "Failed to decode command response value. Error: %" CHIP_ERROR_FORMAT, error.Format());
         return;
     }

     // Log all fields
     ChipLogProgress(NotSpecified, "DecodableType fields:");
     ChipLogProgress(NotSpecified, "  commissioningTimeout: %u", value.commissioningTimeout);
     ChipLogProgress(NotSpecified, "  discriminator: %u", value.discriminator);
     ChipLogProgress(NotSpecified, "  iterations: %u", value.iterations);

     char verifierHex[Crypto::kSpake2p_VerifierSerialized_Length * 2 + 1];
     Encoding::BytesToHex(value.PAKEPasscodeVerifier.data(), value.PAKEPasscodeVerifier.size(), verifierHex, sizeof(verifierHex),
                          Encoding::HexFlags::kNullTerminate);
     ChipLogProgress(NotSpecified, "  PAKEPasscodeVerifier: %s", verifierHex);

     char saltHex[Crypto::kSpake2p_Max_PBKDF_Salt_Length * 2 + 1];
     Encoding::BytesToHex(value.salt.data(), value.salt.size(), saltHex, sizeof(saltHex), Encoding::HexFlags::kNullTerminate);
     ChipLogProgress(NotSpecified, "  salt: %s", saltHex);

     OpenDeviceCommissioningWindow(mLocalBridgeNodeId, value.commissioningTimeout, value.iterations, value.discriminator, saltHex,
                                   verifierHex);
 }

 void DeviceManager::HandleAttributeData(const app::ConcreteDataAttributePath & path, TLV::TLVReader & data)
 {
     if (path.mClusterId == CommissionerControl::Id &&
         path.mAttributeId == CommissionerControl::Attributes::SupportedDeviceCategories::Id)
     {
         HandleReadSupportedDeviceCategories(data);
         return;
     }

     if (path.mClusterId == Descriptor::Id && path.mAttributeId == Descriptor::Attributes::PartsList::Id)
     {
         HandleAttributePartsListUpdate(data);
         return;
     }
 }

 void DeviceManager::HandleEventData(const app::EventHeader & header, TLV::TLVReader & data)
 {
     if (header.mPath.mClusterId == CommissionerControl::Id &&
         header.mPath.mEventId == CommissionerControl::Events::CommissioningRequestResult::Id)
     {
         HandleCommissioningRequestResult(data);
     }
 }

 void DeviceManager::HandleCommandResponse(const app::ConcreteCommandPath & path, TLV::TLVReader & data)
 {
     ChipLogProgress(NotSpecified, "Command Response received.");

     if (path.mClusterId == CommissionerControl::Id &&
         path.mCommandId == CommissionerControl::Commands::ReverseOpenCommissioningWindow::Id)
     {
         HandleReverseOpenCommissioningWindow(data);
     }
 }

 void DeviceManager::OnDeviceRemoved(NodeId deviceId, CHIP_ERROR err)
 {
     if (err != CHIP_NO_ERROR)
     {
         ChipLogError(NotSpecified, "Failed to remove synced device:(" ChipLogFormatX64 ") with error: %" CHIP_ERROR_FORMAT,
                      ChipLogValueX64(deviceId), err.Format());
         return;
     }

     RemoveSyncedDevice(deviceId);
     ChipLogProgress(NotSpecified, "Synced device with NodeId:" ChipLogFormatX64 " has been removed.", ChipLogValueX64(deviceId));
 }
	/*
	*
	* Copyright (c) 2024 Project CHIP Authors
	* All rights reserved.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "DeviceManager.h"

	#include <commands/interactive/InteractiveCommands.h>
	#include <crypto/RandUtils.h>
	#include <lib/support/StringBuilder.h>

	#include <cstdio>
	#include <string>

	using namespace chip;
	using namespace chip::app::Clusters;

	namespace {

	constexpr uint16_t kWindowTimeout = 300;
	constexpr uint16_t kIteration = 1000;
	constexpr uint16_t kSubscribeMinInterval = 0;
	constexpr uint16_t kSubscribeMaxInterval = 60;
	constexpr uint16_t kAggragatorEndpointId = 1;
	constexpr uint16_t kMaxDiscriminatorLength = 4095;
	constexpr uint8_t kEnhancedCommissioningMethod = 1;

	} // namespace

	// Define the static member
	DeviceManager DeviceManager::sInstance;

	void DeviceManager::Init()
	{
	// TODO: (#34113) Init mLastUsedNodeId from chip config file
	mLastUsedNodeId = 1;
	}

	NodeId DeviceManager::GetNextAvailableNodeId()
	{
	mLastUsedNodeId++;
	VerifyOrDieWithMsg(mLastUsedNodeId < std::numeric_limits<NodeId>::max(), NotSpecified, "No more available NodeIds.");

	return mLastUsedNodeId;
	}

	void DeviceManager::UpdateLastUsedNodeId(NodeId nodeId)
	{
	if (nodeId > mLastUsedNodeId)
	{
	ChipLogProgress(NotSpecified, "Updating last used NodeId to " ChipLogFormatX64, ChipLogValueX64(nodeId));
	mLastUsedNodeId = nodeId;
	}
	}

	void DeviceManager::AddSyncedDevice(const Device & device)
	{
	mSyncedDevices.insert(device);
	ChipLogProgress(NotSpecified, "Added synced device: NodeId:" ChipLogFormatX64 ", EndpointId %u",
	ChipLogValueX64(device.GetNodeId()), device.GetEndpointId());
	}

	Device * DeviceManager::FindDeviceByEndpoint(EndpointId endpointId)
	{
	for (auto & device : mSyncedDevices)
	{
	if (device.GetEndpointId() == endpointId)
	{
	return const_cast<Device *>(&device);
	}
	}
	return nullptr;
	}

	Device * DeviceManager::FindDeviceByNode(NodeId nodeId)
	{
	for (auto & device : mSyncedDevices)
	{
	if (device.GetNodeId() == nodeId)
	{
	return const_cast<Device *>(&device);
	}
	}
	return nullptr;
	}

	void DeviceManager::RemoveSyncedDevice(NodeId nodeId)
	{
	Device * device = FindDeviceByNode(nodeId);
	if (device == nullptr)
	{
	ChipLogProgress(NotSpecified, "No device found with NodeId:" ChipLogFormatX64, ChipLogValueX64(nodeId));
	return;
	}

	mSyncedDevices.erase(*device);
	ChipLogProgress(NotSpecified, "Removed synced device: NodeId:" ChipLogFormatX64 ", EndpointId %u",
	ChipLogValueX64(device->GetNodeId()), device->GetEndpointId());
	}

	void DeviceManager::OpenDeviceCommissioningWindow(NodeId nodeId, uint32_t commissioningTimeout, uint32_t iterations,
	uint32_t discriminator, const char * saltHex, const char * verifierHex)
	{
	ChipLogProgress(NotSpecified, "Open the commissioning window of device with NodeId:" ChipLogFormatX64, ChipLogValueX64(nodeId));

	// Open the commissioning window of a device within its own fabric.
	StringBuilder<kMaxCommandSize> commandBuilder;

	commandBuilder.Add("pairing open-commissioning-window ");
	commandBuilder.AddFormat("%lu %d %d %d %d %d --salt hex:%s --verifier hex:%s", nodeId, kRootEndpointId,
	kEnhancedCommissioningMethod, commissioningTimeout, iterations, discriminator, saltHex, verifierHex);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::OpenRemoteDeviceCommissioningWindow(EndpointId remoteEndpointId)
	{
	// Open the commissioning window of a device from another fabric via its fabric bridge.
	// This method constructs and sends a command to open the commissioning window for a device
	// that is part of a different fabric, accessed through a fabric bridge.
	StringBuilder<kMaxCommandSize> commandBuilder;

	// Use random discriminator to have less chance of collision.
	uint16_t discriminator =
	Crypto::GetRandU16() % (kMaxDiscriminatorLength + 1); // Include the upper limit kMaxDiscriminatorLength

	commandBuilder.Add("pairing open-commissioning-window ");
	commandBuilder.AddFormat("%lu %d %d %d %d %d", mRemoteBridgeNodeId, remoteEndpointId, kEnhancedCommissioningMethod,
	kWindowTimeout, kIteration, discriminator);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::PairRemoteFabricBridge(chip::NodeId nodeId, uint32_t setupPINCode, const char * deviceRemoteIp,
	uint16_t deviceRemotePort)
	{
	StringBuilder<kMaxCommandSize> commandBuilder;

	commandBuilder.Add("pairing already-discovered ");
	commandBuilder.AddFormat("%lu %d %s %d", nodeId, setupPINCode, deviceRemoteIp, deviceRemotePort);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::PairRemoteDevice(NodeId nodeId, const char * payload)
	{
	StringBuilder<kMaxCommandSize> commandBuilder;

	commandBuilder.Add("pairing code ");
	commandBuilder.AddFormat("%lu %s", nodeId, payload);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::PairLocalFabricBridge(NodeId nodeId)
	{
	StringBuilder<kMaxCommandSize> commandBuilder;

	commandBuilder.Add("pairing already-discovered ");
	commandBuilder.AddFormat("%lu %d ::1 %d", nodeId, mLocalBridgeSetupPinCode, mLocalBridgePort);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::UnpairRemoteFabricBridge()
	{
	StringBuilder<kMaxCommandSize> commandBuilder;

	commandBuilder.Add("pairing unpair ");
	commandBuilder.AddFormat("%lu", mRemoteBridgeNodeId);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::UnpairLocalFabricBridge()
	{
	StringBuilder<kMaxCommandSize> commandBuilder;

	commandBuilder.Add("pairing unpair ");
	commandBuilder.AddFormat("%lu", mLocalBridgeNodeId);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::SubscribeRemoteFabricBridge()
	{
	// Listen to the state changes of the remote fabric bridge.
	StringBuilder<kMaxCommandSize> commandBuilder;

	// Prepare and push the descriptor subscribe command
	commandBuilder.Add("descriptor subscribe parts-list ");
	commandBuilder.AddFormat("%d %d %lu %d", kSubscribeMinInterval, kSubscribeMaxInterval, mRemoteBridgeNodeId,
	kAggragatorEndpointId);
	PushCommand(commandBuilder.c_str());

	// Clear the builder for the next command
	commandBuilder.Reset();

	// Prepare and push the commissioner control subscribe command
	commandBuilder.Add("commissionercontrol subscribe-event commissioning-request-result ");
	commandBuilder.AddFormat("%d %d %lu %d --is-urgent true --keepSubscriptions true", kSubscribeMinInterval, kSubscribeMaxInterval,
	mRemoteBridgeNodeId, kRootEndpointId);
	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::ReadSupportedDeviceCategories()
	{
	if (!IsFabricSyncReady())
	{
	// print to console
	fprintf(stderr, "Remote Fabric Bridge is not configured yet.\n");
	return;
	}

	StringBuilder<kMaxCommandSize> commandBuilder;

	commandBuilder.Add("commissionercontrol read supported-device-categories ");
	commandBuilder.AddFormat("%ld ", mRemoteBridgeNodeId);
	commandBuilder.AddFormat("%d", kRootEndpointId);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::HandleReadSupportedDeviceCategories(chip::TLV::TLVReader & data)
	{
	ChipLogProgress(NotSpecified, "Attribute SupportedDeviceCategories detected.");

	BitMask<CommissionerControl::SupportedDeviceCategoryBitmap> value;
	CHIP_ERROR error = app::DataModel::Decode(data, value);
	if (error != CHIP_NO_ERROR)
	{
	ChipLogError(NotSpecified, "Failed to decode attribute value. Error: %" CHIP_ERROR_FORMAT, error.Format());
	return;
	}

	if (value.Has(CommissionerControl::SupportedDeviceCategoryBitmap::kFabricSynchronization))
	{
	ChipLogProgress(NotSpecified, "Remote Fabric-Bridge supports Fabric Synchronization, start reverse commissioning.");
	RequestCommissioningApproval();
	}
	}

	void DeviceManager::RequestCommissioningApproval()
	{
	ChipLogProgress(NotSpecified, "Starting reverse commissioning for bridge device: NodeId: " ChipLogFormatX64,
	ChipLogValueX64(mRemoteBridgeNodeId));

	uint64_t requestId = Crypto::GetRandU64();
	uint16_t vendorId = static_cast<uint16_t>(CHIP_DEVICE_CONFIG_DEVICE_VENDOR_ID);
	uint16_t productId = static_cast<uint16_t>(CHIP_DEVICE_CONFIG_DEVICE_PRODUCT_ID);

	StringBuilder<kMaxCommandSize> commandBuilder;
	commandBuilder.Add("commissionercontrol request-commissioning-approval ");
	commandBuilder.AddFormat("%lu %u %u %lu %d", requestId, vendorId, productId, mRemoteBridgeNodeId, kRootEndpointId);

	mRequestId = requestId;
	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::HandleCommissioningRequestResult(TLV::TLVReader & data)
	{
	ChipLogProgress(NotSpecified, "CommissioningRequestResult event received.");

	CommissionerControl::Events::CommissioningRequestResult::DecodableType value;
	CHIP_ERROR error = app::DataModel::Decode(data, value);
	if (error != CHIP_NO_ERROR)
	{
	ChipLogError(NotSpecified, "Failed to decode event value. Error: %" CHIP_ERROR_FORMAT, error.Format());
	return;
	}

	if (value.requestID != mRequestId)
	{
	ChipLogError(NotSpecified, "The RequestId does not match the RequestId provided to RequestCommissioningApproval");
	return;
	}

	if (value.statusCode != static_cast<uint8_t>(Protocols::InteractionModel::Status::Success))
	{
	ChipLogError(NotSpecified, "The server is not ready to begin commissioning the requested device");
	return;
	}

	// The server is ready to begin commissioning the requested device, request the Commissioner Control Server to begin
	// commissioning a previously approved request.
	SendCommissionNodeRequest(value.requestID, kResponseTimeoutSeconds);
	}

	void DeviceManager::HandleAttributePartsListUpdate(chip::TLV::TLVReader & data)
	{
	ChipLogProgress(NotSpecified, "Attribute PartsList change detected:");

	app::DataModel::DecodableList<EndpointId> value;
	CHIP_ERROR error = app::DataModel::Decode(data, value);
	if (error != CHIP_NO_ERROR)
	{
	ChipLogError(NotSpecified, "Failed to decode attribute value. Error: %" CHIP_ERROR_FORMAT, error.Format());
	return;
	}

	std::set<EndpointId> newEndpoints;

	// Populate the newEndpoints set from the decoded value using an iterator
	auto iter = value.begin();
	while (iter.Next())
	{
	newEndpoints.insert(iter.GetValue());
	}

	if (iter.GetStatus() != CHIP_NO_ERROR)
	{
	ChipLogError(NotSpecified, "Failed to iterate over decoded attribute value.");
	return;
	}

	// Compare newEndpoints with mSyncedDevices to determine added and removed endpoints
	std::vector<EndpointId> addedEndpoints;
	std::vector<EndpointId> removedEndpoints;

	// Note: We're using vectors and manual searches instead of set operations
	// because we need to work with the Device objects in mSyncedDevices,
	// not just their EndpointIds. This approach allows us to access the full
	// Device information when processing changes.

	// Find added endpoints
	for (const auto & endpoint : newEndpoints)
	{
	if (FindDeviceByEndpoint(endpoint) == nullptr)
	{
	addedEndpoints.push_back(endpoint);
	}
	}

	// Find removed endpoints
	for (auto & device : mSyncedDevices)
	{
	EndpointId endpointId = device.GetEndpointId();
	if (newEndpoints.find(endpointId) == newEndpoints.end())
	{
	removedEndpoints.push_back(endpointId);
	}
	}

	// Process added endpoints
	for (const auto & endpoint : addedEndpoints)
	{
	// print to console
	fprintf(stderr, "A new device is added on Endpoint: %u\n", endpoint);

	if (mAutoSyncEnabled)
	{
	StringBuilder<kMaxCommandSize> commandBuilder;
	commandBuilder.Add("fabricsync sync-device ");
	commandBuilder.AddFormat("%d", endpoint);
	PushCommand(commandBuilder.c_str());
	}
	}

	// Process removed endpoints
	for (const auto & endpoint : removedEndpoints)
	{
	ChipLogProgress(NotSpecified, "Endpoint removed: %u", endpoint);

	Device * device = FindDeviceByEndpoint(endpoint);

	if (device == nullptr)
	{
	ChipLogProgress(NotSpecified, "No device on Endpoint: %u", endpoint);
	continue;
	}

	if (mAutoSyncEnabled)
	{
	StringBuilder<kMaxCommandSize> commandBuilder;
	commandBuilder.Add("pairing unpair ");
	commandBuilder.AddFormat("%lu", device->GetNodeId());

	PairingCommand * pairingCommand = static_cast<PairingCommand *>(CommandMgr().GetCommandByName("pairing", "unpair"));

	if (pairingCommand == nullptr)
	{
	ChipLogError(NotSpecified, "Pairing code command is not available");
	return;
	}

	pairingCommand->RegisterPairingDelegate(this);
	PushCommand(commandBuilder.c_str());
	}
	}
	}

	void DeviceManager::SendCommissionNodeRequest(uint64_t requestId, uint16_t responseTimeoutSeconds)
	{
	ChipLogProgress(NotSpecified, "Request the Commissioner Control Server to begin commissioning a previously approved request.");

	StringBuilder<kMaxCommandSize> commandBuilder;
	commandBuilder.Add("commissionercontrol commission-node ");
	commandBuilder.AddFormat("%lu %u %lu %d", requestId, responseTimeoutSeconds, mRemoteBridgeNodeId, kRootEndpointId);

	PushCommand(commandBuilder.c_str());
	}

	void DeviceManager::HandleReverseOpenCommissioningWindow(TLV::TLVReader & data)
	{
	CommissionerControl::Commands::ReverseOpenCommissioningWindow::DecodableType value;
	CHIP_ERROR error = app::DataModel::Decode(data, value);
	if (error != CHIP_NO_ERROR)
	{
	ChipLogError(NotSpecified, "Failed to decode command response value. Error: %" CHIP_ERROR_FORMAT, error.Format());
	return;
	}

	// Log all fields
	ChipLogProgress(NotSpecified, "DecodableType fields:");
	ChipLogProgress(NotSpecified, " commissioningTimeout: %u", value.commissioningTimeout);
	ChipLogProgress(NotSpecified, " discriminator: %u", value.discriminator);
	ChipLogProgress(NotSpecified, " iterations: %u", value.iterations);

	char verifierHex[Crypto::kSpake2p_VerifierSerialized_Length * 2 + 1];
	Encoding::BytesToHex(value.PAKEPasscodeVerifier.data(), value.PAKEPasscodeVerifier.size(), verifierHex, sizeof(verifierHex),
	Encoding::HexFlags::kNullTerminate);
	ChipLogProgress(NotSpecified, " PAKEPasscodeVerifier: %s", verifierHex);

	char saltHex[Crypto::kSpake2p_Max_PBKDF_Salt_Length * 2 + 1];
	Encoding::BytesToHex(value.salt.data(), value.salt.size(), saltHex, sizeof(saltHex), Encoding::HexFlags::kNullTerminate);
	ChipLogProgress(NotSpecified, " salt: %s", saltHex);

	OpenDeviceCommissioningWindow(mLocalBridgeNodeId, value.commissioningTimeout, value.iterations, value.discriminator, saltHex,
	verifierHex);
	}

	void DeviceManager::HandleAttributeData(const app::ConcreteDataAttributePath & path, TLV::TLVReader & data)
	{
	if (path.mClusterId == CommissionerControl::Id &&
	path.mAttributeId == CommissionerControl::Attributes::SupportedDeviceCategories::Id)
	{
	HandleReadSupportedDeviceCategories(data);
	return;
	}

	if (path.mClusterId == Descriptor::Id && path.mAttributeId == Descriptor::Attributes::PartsList::Id)
	{
	HandleAttributePartsListUpdate(data);
	return;
	}
	}

	void DeviceManager::HandleEventData(const app::EventHeader & header, TLV::TLVReader & data)
	{
	if (header.mPath.mClusterId == CommissionerControl::Id &&
	header.mPath.mEventId == CommissionerControl::Events::CommissioningRequestResult::Id)
	{
	HandleCommissioningRequestResult(data);
	}
	}

	void DeviceManager::HandleCommandResponse(const app::ConcreteCommandPath & path, TLV::TLVReader & data)
	{
	ChipLogProgress(NotSpecified, "Command Response received.");

	if (path.mClusterId == CommissionerControl::Id &&
	path.mCommandId == CommissionerControl::Commands::ReverseOpenCommissioningWindow::Id)
	{
	HandleReverseOpenCommissioningWindow(data);
	}
	}

	void DeviceManager::OnDeviceRemoved(NodeId deviceId, CHIP_ERROR err)
	{
	if (err != CHIP_NO_ERROR)
	{
	ChipLogError(NotSpecified, "Failed to remove synced device:(" ChipLogFormatX64 ") with error: %" CHIP_ERROR_FORMAT,
	ChipLogValueX64(deviceId), err.Format());
	return;
	}

	RemoveSyncedDevice(deviceId);
	ChipLogProgress(NotSpecified, "Synced device with NodeId:" ChipLogFormatX64 " has been removed.", ChipLogValueX64(deviceId));
	}