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CHIPDeviceController.cpp
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/*
*
* Copyright (c) 2020-2021 Project CHIP Authors
* Copyright (c) 2013-2017 Nest Labs, Inc.
* 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.
*/
/**
* @file
* Implementation of CHIP Device Controller, a common class
* that implements discovery, pairing and provisioning of CHIP
* devices.
*
*/
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
// module header, comes first
#include <controller/CHIPDeviceController.h>
#include <app/common/gen/enums.h>
#include <controller/data_model/gen/CHIPClusters.h>
#if CONFIG_DEVICE_LAYER
#include <platform/CHIPDeviceLayer.h>
#include <platform/ConfigurationManager.h>
#endif
#include <app/InteractionModelEngine.h>
#include <app/util/DataModelHandler.h>
#include <core/CHIPCore.h>
#include <core/CHIPEncoding.h>
#include <core/CHIPSafeCasts.h>
#include <credentials/CHIPCert.h>
#include <crypto/CHIPCryptoPAL.h>
#include <lib/core/NodeId.h>
#include <messaging/ExchangeContext.h>
#include <protocols/secure_channel/MessageCounterManager.h>
#include <setup_payload/QRCodeSetupPayloadParser.h>
#include <support/Base64.h>
#include <support/CHIPArgParser.hpp>
#include <support/CHIPMem.h>
#include <support/CodeUtils.h>
#include <support/ErrorStr.h>
#include <support/PersistentStorageMacros.h>
#include <support/SafeInt.h>
#include <support/ScopedBuffer.h>
#include <support/TimeUtils.h>
#include <support/logging/CHIPLogging.h>
#if CONFIG_NETWORK_LAYER_BLE
#include <ble/BleLayer.h>
#include <transport/raw/BLE.h>
#endif
#include <app/util/af-enums.h>
#include <errno.h>
#include <inttypes.h>
#include <memory>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
using namespace chip::Inet;
using namespace chip::System;
using namespace chip::Credentials;
// For some applications those does not implement IMDelegate, the DeviceControllerInteractionModelDelegate will dispatch the
// response to IMDefaultResponseCallback CHIPClientCallbacks, for the applications those implemented IMDelegate, this function will
// not be used.
bool __attribute__((weak)) IMDefaultResponseCallback(const chip::app::Command * commandObj, EmberAfStatus status)
{
return false;
}
namespace chip {
namespace Controller {
using namespace chip::Encoding;
#if CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
using namespace chip::Protocols::UserDirectedCommissioning;
#endif // CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
constexpr uint32_t kSessionEstablishmentTimeout = 30 * kMillisecondsPerSecond;
constexpr uint32_t kMaxCHIPCSRLength = 1024;
DeviceController::DeviceController() : mLocalNOCChainCallback(OnLocalNOCChainGeneration, this)
{
mState = State::NotInitialized;
mSessionMgr = nullptr;
mExchangeMgr = nullptr;
mLocalDeviceId = 0;
mStorageDelegate = nullptr;
mPairedDevicesInitialized = false;
mListenPort = CHIP_PORT;
}
CHIP_ERROR DeviceController::Init(NodeId localDeviceId, ControllerInitParams params)
{
VerifyOrReturnError(mState == State::NotInitialized, CHIP_ERROR_INCORRECT_STATE);
if (params.systemLayer != nullptr && params.inetLayer != nullptr)
{
mSystemLayer = params.systemLayer;
mInetLayer = params.inetLayer;
}
else
{
#if CONFIG_DEVICE_LAYER
ReturnErrorOnFailure(DeviceLayer::PlatformMgr().InitChipStack());
mSystemLayer = &DeviceLayer::SystemLayer;
mInetLayer = &DeviceLayer::InetLayer;
#endif // CONFIG_DEVICE_LAYER
}
VerifyOrReturnError(mSystemLayer != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
VerifyOrReturnError(mInetLayer != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
mStorageDelegate = params.storageDelegate;
#if CONFIG_NETWORK_LAYER_BLE
#if CONFIG_DEVICE_LAYER
if (params.bleLayer == nullptr)
{
params.bleLayer = DeviceLayer::ConnectivityMgr().GetBleLayer();
}
#endif // CONFIG_DEVICE_LAYER
mBleLayer = params.bleLayer;
VerifyOrReturnError(mBleLayer != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
#endif
mTransportMgr = chip::Platform::New<DeviceTransportMgr>();
mSessionMgr = chip::Platform::New<SecureSessionMgr>();
mExchangeMgr = chip::Platform::New<Messaging::ExchangeManager>();
mMessageCounterManager = chip::Platform::New<secure_channel::MessageCounterManager>();
ReturnErrorOnFailure(mTransportMgr->Init(
Transport::UdpListenParameters(mInetLayer).SetAddressType(Inet::kIPAddressType_IPv6).SetListenPort(mListenPort)
#if INET_CONFIG_ENABLE_IPV4
,
Transport::UdpListenParameters(mInetLayer).SetAddressType(Inet::kIPAddressType_IPv4).SetListenPort(mListenPort)
#endif
#if CONFIG_NETWORK_LAYER_BLE
,
Transport::BleListenParameters(mBleLayer)
#endif
));
ReturnErrorOnFailure(mFabrics.Init(mStorageDelegate));
Transport::FabricInfo * const fabric = mFabrics.AssignFabricIndex(mFabricIndex, localDeviceId);
VerifyOrReturnError(fabric != nullptr, CHIP_ERROR_NO_MEMORY);
ReturnErrorOnFailure(mFabrics.LoadFromStorage(mFabricIndex));
ReturnErrorOnFailure(mSessionMgr->Init(localDeviceId, mSystemLayer, mTransportMgr, &mFabrics, mMessageCounterManager));
ReturnErrorOnFailure(mExchangeMgr->Init(mSessionMgr));
ReturnErrorOnFailure(mMessageCounterManager->Init(mExchangeMgr));
ReturnErrorOnFailure(mExchangeMgr->RegisterUnsolicitedMessageHandlerForProtocol(Protocols::TempZCL::Id, this));
if (params.imDelegate != nullptr)
{
ReturnErrorOnFailure(chip::app::InteractionModelEngine::GetInstance()->Init(mExchangeMgr, params.imDelegate));
}
else
{
mDefaultIMDelegate = chip::Platform::New<DeviceControllerInteractionModelDelegate>();
ReturnErrorOnFailure(chip::app::InteractionModelEngine::GetInstance()->Init(mExchangeMgr, mDefaultIMDelegate));
}
mExchangeMgr->SetDelegate(this);
#if CHIP_DEVICE_CONFIG_ENABLE_MDNS
ReturnErrorOnFailure(Mdns::Resolver::Instance().SetResolverDelegate(this));
RegisterDeviceAddressUpdateDelegate(params.mDeviceAddressUpdateDelegate);
Mdns::Resolver::Instance().StartResolver(mInetLayer, kMdnsPort);
#endif // CHIP_DEVICE_CONFIG_ENABLE_MDNS
InitDataModelHandler(mExchangeMgr);
mState = State::Initialized;
mLocalDeviceId = localDeviceId;
VerifyOrReturnError(params.operationalCredentialsDelegate != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
mOperationalCredentialsDelegate = params.operationalCredentialsDelegate;
ReturnErrorOnFailure(LoadLocalCredentials(fabric));
ReleaseAllDevices();
return CHIP_NO_ERROR;
}
void DeviceController::OnLocalNOCChainGeneration(void * context, CHIP_ERROR status, const ByteSpan & noc, const ByteSpan & icac,
const ByteSpan & rcac)
{
CHIP_ERROR err = CHIP_NO_ERROR;
DeviceController * controller = static_cast<DeviceController *>(context);
Transport::FabricInfo * const fabric = controller->mFabrics.FindFabricWithIndex(controller->mFabricIndex);
constexpr uint32_t chipCertAllocatedLen = kMaxCHIPCertLength * 2;
chip::Platform::ScopedMemoryBuffer<uint8_t> chipCert;
uint32_t chipCertLen = 0;
// Check if the callback returned a failure
VerifyOrExit(status == CHIP_NO_ERROR, err = status);
VerifyOrExit(fabric != nullptr, err = CHIP_ERROR_INCORRECT_STATE);
VerifyOrExit(chipCert.Alloc(chipCertAllocatedLen), err = CHIP_ERROR_NO_MEMORY);
err = ConvertX509CertToChipCert(rcac, chipCert.Get(), chipCertAllocatedLen, chipCertLen);
SuccessOrExit(err);
err = fabric->SetRootCert(ByteSpan(chipCert.Get(), chipCertLen));
SuccessOrExit(err);
if (icac.empty())
{
ChipLogProgress(Controller, "Intermediate CA is not needed");
}
{
MutableByteSpan chipCertSpan(chipCert.Get(), chipCertAllocatedLen);
err = ConvertX509CertsToChipCertArray(noc, icac, chipCertSpan);
SuccessOrExit(err);
err = fabric->SetOperationalCertsFromCertArray(chipCertSpan);
SuccessOrExit(err);
}
err = controller->mFabrics.Store(fabric->GetFabricIndex());
exit:
if (err != CHIP_NO_ERROR)
{
ChipLogError(Controller, "Failed in generating local operational credentials. Error %s", ErrorStr(err));
controller->mState = State::NotInitialized;
}
}
CHIP_ERROR DeviceController::LoadLocalCredentials(Transport::FabricInfo * fabric)
{
ChipLogProgress(Controller, "Getting operational keys");
Crypto::P256Keypair * keypair = fabric->GetOperationalKey();
ReturnErrorCodeIf(keypair == nullptr, CHIP_ERROR_NO_MEMORY);
if (!fabric->AreCredentialsAvailable())
{
chip::Platform::ScopedMemoryBuffer<uint8_t> CSR;
size_t csrLength = kMaxCHIPCSRLength;
ReturnErrorCodeIf(!CSR.Alloc(csrLength), CHIP_ERROR_NO_MEMORY);
ReturnErrorOnFailure(keypair->NewCertificateSigningRequest(CSR.Get(), csrLength));
ChipLogProgress(Controller, "Getting certificate chain for the controller from the issuer");
// As per specifications section 11.22.5.1. Constant RESP_MAX
constexpr uint16_t kMaxRspLen = 900;
chip::Platform::ScopedMemoryBuffer<uint8_t> csrElements;
ReturnErrorCodeIf(!csrElements.Alloc(kMaxRspLen), CHIP_ERROR_NO_MEMORY);
TLV::TLVWriter csrElementWriter;
TLV::TLVType containerType;
csrElementWriter.Init(csrElements.Get(), kMaxRspLen);
ReturnErrorOnFailure(csrElementWriter.StartContainer(TLV::AnonymousTag, TLV::TLVType::kTLVType_Structure, containerType));
ReturnErrorOnFailure(csrElementWriter.Put(TLV::ContextTag(1), ByteSpan(CSR.Get(), csrLength)));
// TODO - Need a mechanism to generate CSRNonce for commissioner's CSR
ReturnErrorOnFailure(csrElementWriter.Put(TLV::ContextTag(2), ByteSpan()));
ReturnErrorOnFailure(csrElementWriter.Put(TLV::ContextTag(3), ByteSpan()));
ReturnErrorOnFailure(csrElementWriter.Put(TLV::ContextTag(4), ByteSpan()));
ReturnErrorOnFailure(csrElementWriter.Put(TLV::ContextTag(5), ByteSpan()));
ReturnErrorOnFailure(csrElementWriter.EndContainer(containerType));
ReturnErrorOnFailure(csrElementWriter.Finalize());
mOperationalCredentialsDelegate->SetNodeIdForNextNOCRequest(mLocalDeviceId);
mOperationalCredentialsDelegate->SetFabricIdForNextNOCRequest(0);
// TODO - Need a mechanism to generate signature for commissioner's CSR
ReturnErrorOnFailure(mOperationalCredentialsDelegate->GenerateNOCChain(
ByteSpan(csrElements.Get(), csrElementWriter.GetLengthWritten()), ByteSpan(), ByteSpan(), ByteSpan(), ByteSpan(),
&mLocalNOCChainCallback));
ReturnErrorOnFailure(mFabrics.Store(fabric->GetFabricIndex()));
}
ChipLogProgress(Controller, "Generating credentials");
ReturnErrorOnFailure(fabric->GetCredentials(mCredentials, mCertificates, mRootKeyId, mCredentialsIndex));
ChipLogProgress(Controller, "Loaded credentials successfully");
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::Shutdown()
{
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
ChipLogDetail(Controller, "Shutting down the controller");
for (uint32_t i = 0; i < kNumMaxActiveDevices; i++)
{
mActiveDevices[i].Reset();
}
#if CONFIG_DEVICE_LAYER
//
// We can safely call PlatformMgr().Shutdown(), which like DeviceController::Shutdown(),
// expects to be called with external thread synchronization and will not try to acquire the
// stack lock.
//
// Actually stopping the event queue is a separable call that applications will have to sequence.
// Consumers are expected to call PlaformMgr().StopEventLoopTask() before calling
// DeviceController::Shutdown() in the CONFIG_DEVICE_LAYER configuration
//
ReturnErrorOnFailure(DeviceLayer::PlatformMgr().Shutdown());
#else
ReturnErrorOnFailure(mInetLayer->Shutdown());
ReturnErrorOnFailure(mSystemLayer->Shutdown());
chip::Platform::Delete(mInetLayer);
chip::Platform::Delete(mSystemLayer);
#endif // CONFIG_DEVICE_LAYER
mSystemLayer = nullptr;
mInetLayer = nullptr;
mState = State::NotInitialized;
// Shut down the interaction model before we try shuttting down the exchange
// manager.
app::InteractionModelEngine::GetInstance()->Shutdown();
// TODO(#6668): Some exchange has leak, shutting down ExchangeManager will cause a assert fail.
// if (mExchangeMgr != nullptr)
// {
// mExchangeMgr->Shutdown();
// }
if (mSessionMgr != nullptr)
{
mSessionMgr->Shutdown();
}
mStorageDelegate = nullptr;
ReleaseAllDevices();
if (mMessageCounterManager != nullptr)
{
chip::Platform::Delete(mMessageCounterManager);
mMessageCounterManager = nullptr;
}
if (mExchangeMgr != nullptr)
{
chip::Platform::Delete(mExchangeMgr);
mExchangeMgr = nullptr;
}
if (mSessionMgr != nullptr)
{
chip::Platform::Delete(mSessionMgr);
mSessionMgr = nullptr;
}
if (mTransportMgr != nullptr)
{
chip::Platform::Delete(mTransportMgr);
mTransportMgr = nullptr;
}
if (mDefaultIMDelegate != nullptr)
{
chip::Platform::Delete(mDefaultIMDelegate);
mDefaultIMDelegate = nullptr;
}
mFabrics.ReleaseFabricIndex(mFabricIndex);
#if CHIP_DEVICE_CONFIG_ENABLE_MDNS
Mdns::Resolver::Instance().SetResolverDelegate(nullptr);
mDeviceAddressUpdateDelegate = nullptr;
#endif // CHIP_DEVICE_CONFIG_ENABLE_MDNS
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::SetUdpListenPort(uint16_t listenPort)
{
if (mState == State::Initialized)
{
return CHIP_ERROR_INCORRECT_STATE;
}
mListenPort = listenPort;
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::GetDevice(NodeId deviceId, Device ** out_device)
{
CHIP_ERROR err = CHIP_NO_ERROR;
Device * device = nullptr;
uint16_t index = 0;
VerifyOrExit(out_device != nullptr, err = CHIP_ERROR_INVALID_ARGUMENT);
index = FindDeviceIndex(deviceId);
if (index < kNumMaxActiveDevices)
{
device = &mActiveDevices[index];
}
else
{
err = InitializePairedDeviceList();
SuccessOrExit(err);
VerifyOrExit(mPairedDevices.Contains(deviceId), err = CHIP_ERROR_NOT_CONNECTED);
index = GetInactiveDeviceIndex();
VerifyOrExit(index < kNumMaxActiveDevices, err = CHIP_ERROR_NO_MEMORY);
device = &mActiveDevices[index];
{
SerializedDevice deviceInfo;
uint16_t size = sizeof(deviceInfo.inner);
PERSISTENT_KEY_OP(deviceId, kPairedDeviceKeyPrefix, key,
err = mStorageDelegate->SyncGetKeyValue(key, deviceInfo.inner, size));
SuccessOrExit(err);
VerifyOrExit(size <= sizeof(deviceInfo.inner), err = CHIP_ERROR_INVALID_DEVICE_DESCRIPTOR);
err = device->Deserialize(deviceInfo);
VerifyOrExit(err == CHIP_NO_ERROR, ReleaseDevice(device));
device->Init(GetControllerDeviceInitParams(), mListenPort, mFabricIndex);
}
}
*out_device = device;
exit:
if (err != CHIP_NO_ERROR && device != nullptr)
{
ReleaseDevice(device);
}
return err;
}
bool DeviceController::DoesDevicePairingExist(const PeerId & deviceId)
{
if (InitializePairedDeviceList() == CHIP_NO_ERROR)
{
return mPairedDevices.Contains(deviceId.GetNodeId());
}
return false;
}
CHIP_ERROR DeviceController::GetConnectedDevice(NodeId deviceId, Callback::Callback<OnDeviceConnected> * onConnection,
Callback::Callback<OnDeviceConnectionFailure> * onFailure)
{
CHIP_ERROR err = CHIP_NO_ERROR;
Device * device = nullptr;
err = GetDevice(deviceId, &device);
SuccessOrExit(err);
if (device->IsSecureConnected())
{
onConnection->mCall(onConnection->mContext, device);
return CHIP_NO_ERROR;
}
err = device->EstablishConnectivity(onConnection, onFailure);
SuccessOrExit(err);
exit:
if (err != CHIP_NO_ERROR)
{
onFailure->mCall(onFailure->mContext, deviceId, err);
}
return err;
}
CHIP_ERROR DeviceController::UpdateDevice(NodeId deviceId, uint64_t fabricId)
{
#if CHIP_DEVICE_CONFIG_ENABLE_MDNS
return Mdns::Resolver::Instance().ResolveNodeId(chip::PeerId().SetNodeId(deviceId).SetFabricId(fabricId),
chip::Inet::kIPAddressType_Any);
#else
return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
#endif // CHIP_DEVICE_CONFIG_ENABLE_MDNS
}
void DeviceController::PersistDevice(Device * device)
{
if (mState == State::Initialized)
{
device->Persist();
}
else
{
ChipLogError(Controller, "Failed to persist device. Controller not initialized.");
}
}
CHIP_ERROR DeviceController::ServiceEvents()
{
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
#if CONFIG_DEVICE_LAYER
ReturnErrorOnFailure(DeviceLayer::PlatformMgr().StartEventLoopTask());
#endif // CONFIG_DEVICE_LAYER
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::ServiceEventSignal()
{
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
#if CONFIG_DEVICE_LAYER && (CHIP_SYSTEM_CONFIG_USE_SOCKETS || CHIP_SYSTEM_CONFIG_USE_NETWORK_FRAMEWORK)
DeviceLayer::SystemLayer.WatchableEvents().Signal();
#else
ReturnErrorOnFailure(CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE);
#endif // CONFIG_DEVICE_LAYER && (CHIP_SYSTEM_CONFIG_USE_SOCKETS || CHIP_SYSTEM_CONFIG_USE_NETWORK_FRAMEWORK)
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::GetFabricId(uint64_t & fabricId)
{
Transport::FabricInfo * fabric = mFabrics.FindFabricWithIndex(mFabricIndex);
VerifyOrReturnError(fabric != nullptr, CHIP_ERROR_INCORRECT_STATE);
fabricId = fabric->GetFabricId();
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::OnMessageReceived(Messaging::ExchangeContext * ec, const PacketHeader & packetHeader,
const PayloadHeader & payloadHeader, System::PacketBufferHandle && msgBuf)
{
uint16_t index;
VerifyOrExit(mState == State::Initialized, ChipLogError(Controller, "OnMessageReceived was called in incorrect state"));
VerifyOrExit(packetHeader.GetSourceNodeId().HasValue(),
ChipLogError(Controller, "OnMessageReceived was called for unknown source node"));
index = FindDeviceIndex(packetHeader.GetSourceNodeId().Value());
VerifyOrExit(index < kNumMaxActiveDevices, ChipLogError(Controller, "OnMessageReceived was called for unknown device object"));
mActiveDevices[index].OnMessageReceived(ec, packetHeader, payloadHeader, std::move(msgBuf));
exit:
return CHIP_NO_ERROR;
}
void DeviceController::OnResponseTimeout(Messaging::ExchangeContext * ec)
{
ChipLogProgress(Controller, "Time out! failed to receive response from Exchange: %p", ec);
}
void DeviceController::OnNewConnection(SecureSessionHandle session, Messaging::ExchangeManager * mgr)
{
VerifyOrReturn(mState == State::Initialized, ChipLogError(Controller, "OnNewConnection was called in incorrect state"));
uint16_t index = FindDeviceIndex(mgr->GetSessionMgr()->GetPeerConnectionState(session)->GetPeerNodeId());
VerifyOrReturn(index < kNumMaxActiveDevices,
ChipLogDetail(Controller, "OnNewConnection was called for unknown device, ignoring it."));
mActiveDevices[index].OnNewConnection(session);
}
void DeviceController::OnConnectionExpired(SecureSessionHandle session, Messaging::ExchangeManager * mgr)
{
VerifyOrReturn(mState == State::Initialized, ChipLogError(Controller, "OnConnectionExpired was called in incorrect state"));
uint16_t index = FindDeviceIndex(session);
VerifyOrReturn(index < kNumMaxActiveDevices,
ChipLogDetail(Controller, "OnConnectionExpired was called for unknown device, ignoring it."));
mActiveDevices[index].OnConnectionExpired(session);
}
uint16_t DeviceController::GetInactiveDeviceIndex()
{
uint16_t i = 0;
while (i < kNumMaxActiveDevices && mActiveDevices[i].IsActive())
i++;
if (i < kNumMaxActiveDevices)
{
mActiveDevices[i].SetActive(true);
}
return i;
}
void DeviceController::ReleaseDevice(Device * device)
{
device->Reset();
}
void DeviceController::ReleaseDevice(uint16_t index)
{
if (index < kNumMaxActiveDevices)
{
ReleaseDevice(&mActiveDevices[index]);
}
}
void DeviceController::ReleaseDeviceById(NodeId remoteDeviceId)
{
for (uint16_t i = 0; i < kNumMaxActiveDevices; i++)
{
if (mActiveDevices[i].GetDeviceId() == remoteDeviceId)
{
ReleaseDevice(&mActiveDevices[i]);
}
}
}
void DeviceController::ReleaseAllDevices()
{
for (uint16_t i = 0; i < kNumMaxActiveDevices; i++)
{
ReleaseDevice(&mActiveDevices[i]);
}
}
uint16_t DeviceController::FindDeviceIndex(SecureSessionHandle session)
{
uint16_t i = 0;
while (i < kNumMaxActiveDevices)
{
if (mActiveDevices[i].IsActive() && mActiveDevices[i].IsSecureConnected() && mActiveDevices[i].MatchesSession(session))
{
return i;
}
i++;
}
return i;
}
uint16_t DeviceController::FindDeviceIndex(NodeId id)
{
uint16_t i = 0;
while (i < kNumMaxActiveDevices)
{
if (mActiveDevices[i].IsActive() && mActiveDevices[i].GetDeviceId() == id)
{
return i;
}
i++;
}
return i;
}
CHIP_ERROR DeviceController::InitializePairedDeviceList()
{
CHIP_ERROR err = CHIP_NO_ERROR;
uint8_t * buffer = nullptr;
VerifyOrExit(mStorageDelegate != nullptr, err = CHIP_ERROR_INCORRECT_STATE);
if (!mPairedDevicesInitialized)
{
constexpr uint16_t max_size = sizeof(uint64_t) * kNumMaxPairedDevices;
buffer = static_cast<uint8_t *>(chip::Platform::MemoryCalloc(max_size, 1));
uint16_t size = max_size;
VerifyOrExit(buffer != nullptr, err = CHIP_ERROR_INVALID_ARGUMENT);
CHIP_ERROR lookupError = CHIP_NO_ERROR;
PERSISTENT_KEY_OP(static_cast<uint64_t>(0), kPairedDeviceListKeyPrefix, key,
lookupError = mStorageDelegate->SyncGetKeyValue(key, buffer, size));
// It's ok to not have an entry for the Paired Device list. We treat it the same as having an empty list.
if (lookupError != CHIP_ERROR_KEY_NOT_FOUND)
{
VerifyOrExit(size <= max_size, err = CHIP_ERROR_INVALID_DEVICE_DESCRIPTOR);
err = SetPairedDeviceList(ByteSpan(buffer, size));
SuccessOrExit(err);
}
}
exit:
if (buffer != nullptr)
{
chip::Platform::MemoryFree(buffer);
}
if (err != CHIP_NO_ERROR)
{
ChipLogError(Controller, "Failed to initialize the device list with error: %" CHIP_ERROR_FORMAT,
ChipError::FormatError(err));
}
return err;
}
CHIP_ERROR DeviceController::SetPairedDeviceList(ByteSpan serialized)
{
CHIP_ERROR err = mPairedDevices.Deserialize(serialized);
if (err != CHIP_NO_ERROR)
{
ChipLogError(Controller, "Failed to recreate the device list with buffer %.*s\n", static_cast<int>(serialized.size()),
serialized.data());
}
else
{
mPairedDevicesInitialized = true;
}
return err;
}
void DeviceController::PersistNextKeyId()
{
if (mStorageDelegate != nullptr && mState == State::Initialized)
{
uint16_t nextKeyID = mIDAllocator.Peek();
mStorageDelegate->SyncSetKeyValue(kNextAvailableKeyID, &nextKeyID, sizeof(nextKeyID));
}
}
#if CHIP_DEVICE_CONFIG_ENABLE_MDNS
void DeviceController::OnNodeIdResolved(const chip::Mdns::ResolvedNodeData & nodeData)
{
CHIP_ERROR err = CHIP_NO_ERROR;
Device * device = nullptr;
err = GetDevice(nodeData.mPeerId.GetNodeId(), &device);
SuccessOrExit(err);
err = device->UpdateAddress(Transport::PeerAddress::UDP(nodeData.mAddress, nodeData.mPort, nodeData.mInterfaceId));
SuccessOrExit(err);
PersistDevice(device);
exit:
if (mDeviceAddressUpdateDelegate != nullptr)
{
mDeviceAddressUpdateDelegate->OnAddressUpdateComplete(nodeData.mPeerId.GetNodeId(), err);
}
return;
};
void DeviceController::OnNodeIdResolutionFailed(const chip::PeerId & peer, CHIP_ERROR error)
{
ChipLogError(Controller, "Error resolving node id: %s", ErrorStr(error));
if (mDeviceAddressUpdateDelegate != nullptr)
{
mDeviceAddressUpdateDelegate->OnAddressUpdateComplete(peer.GetNodeId(), error);
}
};
#endif // CHIP_DEVICE_CONFIG_ENABLE_MDNS
ControllerDeviceInitParams DeviceController::GetControllerDeviceInitParams()
{
return ControllerDeviceInitParams{
.transportMgr = mTransportMgr,
.sessionMgr = mSessionMgr,
.exchangeMgr = mExchangeMgr,
.inetLayer = mInetLayer,
.storageDelegate = mStorageDelegate,
.credentials = &mCredentials,
.credentialsIndex = mCredentialsIndex,
.idAllocator = &mIDAllocator,
};
}
DeviceCommissioner::DeviceCommissioner() :
mSuccess(BasicSuccess, this), mFailure(BasicFailure, this),
mOpCSRResponseCallback(OnOperationalCertificateSigningRequest, this),
mNOCResponseCallback(OnOperationalCertificateAddResponse, this), mRootCertResponseCallback(OnRootCertSuccessResponse, this),
mOnCSRFailureCallback(OnCSRFailureResponse, this), mOnCertFailureCallback(OnAddNOCFailureResponse, this),
mOnRootCertFailureCallback(OnRootCertFailureResponse, this), mOnDeviceConnectedCallback(OnDeviceConnectedFn, this),
mOnDeviceConnectionFailureCallback(OnDeviceConnectionFailureFn, this), mDeviceNOCChainCallback(OnDeviceNOCChainGeneration, this)
{
mPairingDelegate = nullptr;
mDeviceBeingPaired = kNumMaxActiveDevices;
mPairedDevicesUpdated = false;
}
CHIP_ERROR DeviceCommissioner::Init(NodeId localDeviceId, CommissionerInitParams params)
{
ReturnErrorOnFailure(DeviceController::Init(localDeviceId, params));
uint16_t nextKeyID = 0;
uint16_t size = sizeof(nextKeyID);
CHIP_ERROR error = mStorageDelegate->SyncGetKeyValue(kNextAvailableKeyID, &nextKeyID, size);
if ((error != CHIP_NO_ERROR) || (size != sizeof(nextKeyID)))
{
nextKeyID = 0;
}
ReturnErrorOnFailure(mIDAllocator.ReserveUpTo(nextKeyID));
mPairingDelegate = params.pairingDelegate;
#if CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY // make this commissioner discoverable
mUdcTransportMgr = chip::Platform::New<DeviceTransportMgr>();
ReturnErrorOnFailure(mUdcTransportMgr->Init(Transport::UdpListenParameters(mInetLayer)
.SetAddressType(Inet::kIPAddressType_IPv6)
.SetListenPort((uint16_t)(mUdcListenPort))
#if INET_CONFIG_ENABLE_IPV4
,
Transport::UdpListenParameters(mInetLayer)
.SetAddressType(Inet::kIPAddressType_IPv4)
.SetListenPort((uint16_t)(mUdcListenPort))
#endif // INET_CONFIG_ENABLE_IPV4
#if CONFIG_NETWORK_LAYER_BLE
,
Transport::BleListenParameters(mBleLayer)
#endif // CONFIG_NETWORK_LAYER_BLE
));
mUdcServer = chip::Platform::New<UserDirectedCommissioningServer>();
mUdcTransportMgr->SetSecureSessionMgr(mUdcServer);
mUdcServer->SetInstanceNameResolver(this);
mUdcServer->SetUserConfirmationProvider(this);
#endif // CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceCommissioner::Shutdown()
{
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
ChipLogDetail(Controller, "Shutting down the commissioner");
mPairingSession.Clear();
PersistDeviceList();
#if CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY // make this commissioner discoverable
if (mUdcServer != nullptr)
{
mUdcServer->SetInstanceNameResolver(nullptr);
mUdcServer->SetUserConfirmationProvider(nullptr);
mUdcServer = nullptr;
}
if (mUdcTransportMgr != nullptr)
{
chip::Platform::Delete(mUdcTransportMgr);
mUdcTransportMgr = nullptr;
}
#endif // CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
DeviceController::Shutdown();
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceCommissioner::PairDevice(NodeId remoteDeviceId, RendezvousParameters & params)
{
CHIP_ERROR err = CHIP_NO_ERROR;
Device * device = nullptr;
Transport::PeerAddress peerAddress = Transport::PeerAddress::UDP(Inet::IPAddress::Any);
Messaging::ExchangeContext * exchangeCtxt = nullptr;
uint16_t keyID = 0;
Transport::FabricInfo * fabric = mFabrics.FindFabricWithIndex(mFabricIndex);
VerifyOrExit(IsOperationalNodeId(remoteDeviceId), err = CHIP_ERROR_INVALID_ARGUMENT);
VerifyOrExit(mState == State::Initialized, err = CHIP_ERROR_INCORRECT_STATE);
VerifyOrExit(mDeviceBeingPaired == kNumMaxActiveDevices, err = CHIP_ERROR_INCORRECT_STATE);
VerifyOrExit(fabric != nullptr, err = CHIP_ERROR_INCORRECT_STATE);
err = InitializePairedDeviceList();
SuccessOrExit(err);
params.SetAdvertisementDelegate(&mRendezvousAdvDelegate);
// TODO: We need to specify the peer address for BLE transport in bindings.
if (params.GetPeerAddress().GetTransportType() == Transport::Type::kBle ||
params.GetPeerAddress().GetTransportType() == Transport::Type::kUndefined)
{
#if CONFIG_NETWORK_LAYER_BLE
if (!params.HasBleLayer())
{
params.SetPeerAddress(Transport::PeerAddress::BLE());
}
peerAddress = Transport::PeerAddress::BLE();
#endif // CONFIG_NETWORK_LAYER_BLE
}
else if (params.GetPeerAddress().GetTransportType() == Transport::Type::kTcp ||
params.GetPeerAddress().GetTransportType() == Transport::Type::kUdp)
{
peerAddress = Transport::PeerAddress::UDP(params.GetPeerAddress().GetIPAddress(), params.GetPeerAddress().GetPort(),
params.GetPeerAddress().GetInterface());
}
mDeviceBeingPaired = GetInactiveDeviceIndex();
VerifyOrExit(mDeviceBeingPaired < kNumMaxActiveDevices, err = CHIP_ERROR_NO_MEMORY);
device = &mActiveDevices[mDeviceBeingPaired];
// If the CSRNonce is passed in, using that else using a random one..
if (params.HasCSRNonce())
{
ReturnErrorOnFailure(device->SetCSRNonce(params.GetCSRNonce().Value()));
}
else
{
uint8_t mCSRNonce[kOpCSRNonceLength];
Crypto::DRBG_get_bytes(mCSRNonce, sizeof(mCSRNonce));
ReturnErrorOnFailure(device->SetCSRNonce(ByteSpan(mCSRNonce)));
}
mIsIPRendezvous = (params.GetPeerAddress().GetTransportType() != Transport::Type::kBle);
err = mPairingSession.MessageDispatch().Init(mTransportMgr);
SuccessOrExit(err);
mPairingSession.MessageDispatch().SetPeerAddress(params.GetPeerAddress());
device->Init(GetControllerDeviceInitParams(), mListenPort, remoteDeviceId, peerAddress, fabric->GetFabricIndex());
mSystemLayer->StartTimer(kSessionEstablishmentTimeout, OnSessionEstablishmentTimeoutCallback, this);
if (params.GetPeerAddress().GetTransportType() != Transport::Type::kBle)
{
device->SetAddress(params.GetPeerAddress().GetIPAddress());
}
#if CONFIG_NETWORK_LAYER_BLE
else
{
if (params.HasConnectionObject())
{
SuccessOrExit(err = mBleLayer->NewBleConnectionByObject(params.GetConnectionObject()));
}
else if (params.HasDiscriminator())
{
SuccessOrExit(err = mBleLayer->NewBleConnectionByDiscriminator(params.GetDiscriminator()));
}
else
{
ExitNow(err = CHIP_ERROR_INVALID_ARGUMENT);
}
}
#endif
exchangeCtxt = mExchangeMgr->NewContext(SecureSessionHandle(), &mPairingSession);
VerifyOrExit(exchangeCtxt != nullptr, err = CHIP_ERROR_INTERNAL);
err = mIDAllocator.Allocate(keyID);
SuccessOrExit(err);
err = mPairingSession.Pair(params.GetPeerAddress(), params.GetSetupPINCode(), keyID, exchangeCtxt, this);
// Immediately persist the updted mNextKeyID value
// TODO maybe remove FreeRendezvousSession() since mNextKeyID is always persisted immediately
PersistNextKeyId();
exit:
if (err != CHIP_NO_ERROR)
{
// Delete the current rendezvous session only if a device is not currently being paired.
if (mDeviceBeingPaired == kNumMaxActiveDevices)
{
FreeRendezvousSession();
}
if (device != nullptr)
{
ReleaseDevice(device);
mDeviceBeingPaired = kNumMaxActiveDevices;
}
}
return err;
}