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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/zap-generated/enums.h>
#include <controller-clusters/zap-generated/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 <app/util/error-mapping.h>
#include <credentials/CHIPCert.h>
#include <credentials/DeviceAttestationCredsProvider.h>
#include <crypto/CHIPCryptoPAL.h>
#include <lib/core/CHIPCore.h>
#include <lib/core/CHIPEncoding.h>
#include <lib/core/CHIPSafeCasts.h>
#include <lib/core/NodeId.h>
#include <lib/support/Base64.h>
#include <lib/support/CHIPArgParser.hpp>
#include <lib/support/CHIPMem.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/ErrorStr.h>
#include <lib/support/PersistentStorageMacros.h>
#include <lib/support/SafeInt.h>
#include <lib/support/ScopedBuffer.h>
#include <lib/support/TimeUtils.h>
#include <lib/support/logging/CHIPLogging.h>
#include <messaging/ExchangeContext.h>
#include <protocols/secure_channel/MessageCounterManager.h>
#include <setup_payload/ManualSetupPayloadGenerator.h>
#include <setup_payload/QRCodeSetupPayloadGenerator.h>
#include <setup_payload/QRCodeSetupPayloadParser.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::Transport;
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;
DeviceController::DeviceController()
{
mState = State::NotInitialized;
mStorageDelegate = nullptr;
mPairedDevicesInitialized = false;
}
CHIP_ERROR DeviceController::Init(ControllerInitParams params)
{
VerifyOrReturnError(mState == State::NotInitialized, CHIP_ERROR_INCORRECT_STATE);
VerifyOrReturnError(params.systemState != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
VerifyOrReturnError(params.systemState->SystemLayer() != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
VerifyOrReturnError(params.systemState->InetLayer() != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
mStorageDelegate = params.storageDelegate;
#if CONFIG_NETWORK_LAYER_BLE
VerifyOrReturnError(params.systemState->BleLayer() != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
#endif
VerifyOrReturnError(params.systemState->TransportMgr() != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
// TODO Exchange Mgr needs to be able to track multiple delegates. Delegate API should be able to query for the right delegate
// to handle events.
ReturnErrorOnFailure(
params.systemState->ExchangeMgr()->RegisterUnsolicitedMessageHandlerForProtocol(Protocols::TempZCL::Id, this));
params.systemState->ExchangeMgr()->SetDelegate(this);
#if CHIP_DEVICE_CONFIG_ENABLE_DNSSD
Dnssd::Resolver::Instance().Init(params.systemState->InetLayer());
Dnssd::Resolver::Instance().SetResolverDelegate(this);
RegisterDeviceAddressUpdateDelegate(params.deviceAddressUpdateDelegate);
RegisterDeviceDiscoveryDelegate(params.deviceDiscoveryDelegate);
#endif // CHIP_DEVICE_CONFIG_ENABLE_DNSSD
InitDataModelHandler(params.systemState->ExchangeMgr());
VerifyOrReturnError(params.operationalCredentialsDelegate != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
mOperationalCredentialsDelegate = params.operationalCredentialsDelegate;
ReturnErrorOnFailure(ProcessControllerNOCChain(params));
mSystemState = params.systemState->Retain();
mState = State::Initialized;
ReleaseAllDevices();
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::ProcessControllerNOCChain(const ControllerInitParams & params)
{
FabricInfo newFabric;
ReturnErrorCodeIf(params.ephemeralKeypair == nullptr, CHIP_ERROR_INVALID_ARGUMENT);
newFabric.SetEphemeralKey(params.ephemeralKeypair);
constexpr uint32_t chipCertAllocatedLen = kMaxCHIPCertLength;
chip::Platform::ScopedMemoryBuffer<uint8_t> chipCert;
ReturnErrorCodeIf(!chipCert.Alloc(chipCertAllocatedLen), CHIP_ERROR_NO_MEMORY);
MutableByteSpan chipCertSpan(chipCert.Get(), chipCertAllocatedLen);
ReturnErrorOnFailure(ConvertX509CertToChipCert(params.controllerRCAC, chipCertSpan));
ReturnErrorOnFailure(newFabric.SetRootCert(chipCertSpan));
if (params.controllerICAC.empty())
{
ChipLogProgress(Controller, "Intermediate CA is not needed");
}
else
{
chipCertSpan = MutableByteSpan(chipCert.Get(), chipCertAllocatedLen);
ReturnErrorOnFailure(ConvertX509CertToChipCert(params.controllerICAC, chipCertSpan));
ReturnErrorOnFailure(newFabric.SetICACert(chipCertSpan));
}
chipCertSpan = MutableByteSpan(chipCert.Get(), chipCertAllocatedLen);
ReturnErrorOnFailure(ConvertX509CertToChipCert(params.controllerNOC, chipCertSpan));
ReturnErrorOnFailure(newFabric.SetNOCCert(chipCertSpan));
newFabric.SetVendorId(params.controllerVendorId);
FabricInfo * fabric = params.systemState->Fabrics()->FindFabricWithIndex(mFabricIndex);
ReturnErrorCodeIf(fabric == nullptr, CHIP_ERROR_INCORRECT_STATE);
ReturnErrorOnFailure(fabric->SetFabricInfo(newFabric));
mLocalId = fabric->GetPeerId();
mVendorId = fabric->GetVendorId();
mFabricId = fabric->GetFabricId();
ChipLogProgress(Controller, "Joined the fabric at index %d. Compressed fabric ID is: 0x" ChipLogFormatX64, mFabricIndex,
ChipLogValueX64(GetCompressedFabricId()));
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();
}
mState = State::NotInitialized;
#if CHIP_DEVICE_CONFIG_ENABLE_DNSSD
Dnssd::Resolver::Instance().Shutdown();
#endif // CHIP_DEVICE_CONFIG_ENABLE_DNSSD
mStorageDelegate = nullptr;
ReleaseAllDevices();
mSystemState->Fabrics()->ReleaseFabricIndex(mFabricIndex);
mSystemState->Release();
mSystemState = nullptr;
#if CHIP_DEVICE_CONFIG_ENABLE_DNSSD
Dnssd::Resolver::Instance().SetResolverDelegate(nullptr);
mDeviceAddressUpdateDelegate = nullptr;
mDeviceDiscoveryDelegate = nullptr;
#endif // CHIP_DEVICE_CONFIG_ENABLE_DNSSD
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(), 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)
{
#if CHIP_DEVICE_CONFIG_ENABLE_DNSSD
return Dnssd::Resolver::Instance().ResolveNodeId(PeerId().SetCompressedFabricId(GetCompressedFabricId()).SetNodeId(deviceId),
chip::Inet::IPAddressType::kAny);
#else
return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
#endif // CHIP_DEVICE_CONFIG_ENABLE_DNSSD
}
void DeviceController::PersistDevice(Device * device)
{
if (mState == State::Initialized)
{
device->Persist();
}
else
{
ChipLogError(Controller, "Failed to persist device. Controller not initialized.");
}
}
CHIP_ERROR DeviceController::OnMessageReceived(Messaging::ExchangeContext * ec, const PayloadHeader & payloadHeader,
System::PacketBufferHandle && msgBuf)
{
uint16_t index;
VerifyOrExit(mState == State::Initialized, ChipLogError(Controller, "OnMessageReceived was called in incorrect state"));
VerifyOrExit(ec != nullptr, ChipLogError(Controller, "OnMessageReceived was called with null exchange"));
index = FindDeviceIndex(ec->GetSessionHandle().GetPeerNodeId());
VerifyOrExit(index < kNumMaxActiveDevices, ChipLogError(Controller, "OnMessageReceived was called for unknown device object"));
mActiveDevices[index].OnMessageReceived(ec, 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: " ChipLogFormatExchange,
ChipLogValueExchange(ec));
}
void DeviceController::OnNewConnection(SessionHandle session, Messaging::ExchangeManager * mgr)
{
VerifyOrReturn(mState == State::Initialized, ChipLogError(Controller, "OnNewConnection was called in incorrect state"));
uint16_t index = FindDeviceIndex(mgr->GetSessionManager()->GetSecureSession(session)->GetPeerNodeId());
VerifyOrReturn(index < kNumMaxActiveDevices,
ChipLogDetail(Controller, "OnNewConnection was called for unknown device, ignoring it."));
mActiveDevices[index].OnNewConnection(session);
}
void DeviceController::OnConnectionExpired(SessionHandle 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(SessionHandle 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, err.Format());
}
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));
}
}
CHIP_ERROR DeviceController::GetPeerAddressAndPort(PeerId peerId, Inet::IPAddress & addr, uint16_t & port)
{
VerifyOrReturnError(GetCompressedFabricId() == peerId.GetCompressedFabricId(), CHIP_ERROR_INVALID_ARGUMENT);
uint16_t index = FindDeviceIndex(peerId.GetNodeId());
VerifyOrReturnError(index < kNumMaxActiveDevices, CHIP_ERROR_NOT_CONNECTED);
VerifyOrReturnError(mActiveDevices[index].GetAddress(addr, port), CHIP_ERROR_NOT_CONNECTED);
return CHIP_NO_ERROR;
}
#if CHIP_DEVICE_CONFIG_ENABLE_DNSSD
void DeviceController::OnNodeIdResolved(const chip::Dnssd::ResolvedNodeData & nodeData)
{
CHIP_ERROR err = CHIP_NO_ERROR;
Device * device = nullptr;
Inet::InterfaceId interfaceId = INET_NULL_INTERFACEID;
err = GetDevice(nodeData.mPeerId.GetNodeId(), &device);
SuccessOrExit(err);
// Only use the mDNS resolution's InterfaceID for addresses that are IPv6 LLA.
// For all other addresses, we should rely on the device's routing table to route messages sent.
// Forcing messages down an InterfaceId might fail. For example, in bridged networks like Thread,
// mDNS advertisements are not usually received on the same interface the peer is reachable on.
if (nodeData.mAddress.IsIPv6LinkLocal())
{
interfaceId = nodeData.mInterfaceId;
}
err = device->UpdateAddress(Transport::PeerAddress::UDP(nodeData.mAddress, nodeData.mPort, interfaceId));
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_DNSSD
ControllerDeviceInitParams DeviceController::GetControllerDeviceInitParams()
{
return ControllerDeviceInitParams{
.transportMgr = mSystemState->TransportMgr(),
.sessionManager = mSystemState->SessionMgr(),
.exchangeMgr = mSystemState->ExchangeMgr(),
.inetLayer = mSystemState->InetLayer(),
.storageDelegate = mStorageDelegate,
.idAllocator = &mIDAllocator,
.fabricsTable = mSystemState->Fabrics(),
.imDelegate = mSystemState->IMDelegate(),
};
}
DeviceCommissioner::DeviceCommissioner() :
mSuccess(BasicSuccess, this), mFailure(BasicFailure, this), mCertificateChainResponseCallback(OnCertificateChainResponse, this),
mAttestationResponseCallback(OnAttestationResponse, this), mOpCSRResponseCallback(OnOperationalCertificateSigningRequest, this),
mNOCResponseCallback(OnOperationalCertificateAddResponse, this), mRootCertResponseCallback(OnRootCertSuccessResponse, this),
mOnCertificateChainFailureCallback(OnCertificateChainFailureResponse, this),
mOnAttestationFailureCallback(OnAttestationFailureResponse, this), mOnCSRFailureCallback(OnCSRFailureResponse, this),
mOnCertFailureCallback(OnAddNOCFailureResponse, this), mOnRootCertFailureCallback(OnRootCertFailureResponse, this),
mOnDeviceConnectedCallback(OnDeviceConnectedFn, this), mOnDeviceConnectionFailureCallback(OnDeviceConnectionFailureFn, this),
mDeviceNOCChainCallback(OnDeviceNOCChainGeneration, this), mSetUpCodePairer(this)
{
mPairingDelegate = nullptr;
mDeviceBeingPaired = kNumMaxActiveDevices;
mPairedDevicesUpdated = false;
}
CHIP_ERROR DeviceCommissioner::Init(CommissionerInitParams params)
{
ReturnErrorOnFailure(DeviceController::Init(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<DeviceIPTransportMgr>();
ReturnErrorOnFailure(mUdcTransportMgr->Init(Transport::UdpListenParameters(mSystemState->InetLayer())
.SetAddressType(Inet::IPAddressType::kIPv6)
.SetListenPort((uint16_t)(mUdcListenPort))
#if INET_CONFIG_ENABLE_IPV4
,
Transport::UdpListenParameters(mSystemState->InetLayer())
.SetAddressType(Inet::IPAddressType::kIPv4)
.SetListenPort((uint16_t)(mUdcListenPort))
#endif // INET_CONFIG_ENABLE_IPV4
));
mUdcServer = chip::Platform::New<UserDirectedCommissioningServer>();
mUdcTransportMgr->SetSessionManager(mUdcServer);
mUdcServer->SetInstanceNameResolver(this);
mUdcServer->SetUserConfirmationProvider(this);
#endif // CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
#if CONFIG_NETWORK_LAYER_BLE
mSetUpCodePairer.SetBleLayer(mSystemState->BleLayer());
#endif // CONFIG_NETWORK_LAYER_BLE
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 (mUdcTransportMgr != nullptr)
{
chip::Platform::Delete(mUdcTransportMgr);
mUdcTransportMgr = nullptr;
}
if (mUdcServer != nullptr)
{
mUdcServer->SetInstanceNameResolver(nullptr);
mUdcServer->SetUserConfirmationProvider(nullptr);
chip::Platform::Delete(mUdcServer);
mUdcServer = nullptr;
}
#endif // CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
DeviceController::Shutdown();
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceCommissioner::PairDevice(NodeId remoteDeviceId, const char * setUpCode)
{
return mSetUpCodePairer.PairDevice(remoteDeviceId, setUpCode);
}
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;
Optional<SessionHandle> session;
uint16_t keyID = 0;
FabricInfo * fabric = mSystemState->Fabrics()->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);
// 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)));
}
// If the AttestationNonce is passed in, using that else using a random one..
if (params.HasAttestationNonce())
{
ReturnErrorOnFailure(device->SetAttestationNonce(params.GetAttestationNonce().Value()));
}
else
{
uint8_t mAttestationNonce[kAttestationNonceLength];
Crypto::DRBG_get_bytes(mAttestationNonce, sizeof(mAttestationNonce));
ReturnErrorOnFailure(device->SetAttestationNonce(ByteSpan(mAttestationNonce)));
}
mIsIPRendezvous = (params.GetPeerAddress().GetTransportType() != Transport::Type::kBle);
err = mPairingSession.MessageDispatch().Init(mSystemState->SessionMgr());
SuccessOrExit(err);
device->Init(GetControllerDeviceInitParams(), remoteDeviceId, peerAddress, fabric->GetFabricIndex());
mSystemState->SystemLayer()->StartTimer(chip::System::Clock::Milliseconds32(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 = mSystemState->BleLayer()->NewBleConnectionByObject(params.GetConnectionObject()));
}
else if (params.HasDiscriminator())
{
SuccessOrExit(err = mSystemState->BleLayer()->NewBleConnectionByDiscriminator(params.GetDiscriminator()));
}
else
{
ExitNow(err = CHIP_ERROR_INVALID_ARGUMENT);
}
}
#endif
session = mSystemState->SessionMgr()->CreateUnauthenticatedSession(params.GetPeerAddress());
VerifyOrExit(session.HasValue(), err = CHIP_ERROR_NO_MEMORY);
exchangeCtxt = mSystemState->ExchangeMgr()->NewContext(session.Value(), &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;
}
CHIP_ERROR DeviceCommissioner::StopPairing(NodeId remoteDeviceId)
{
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
VerifyOrReturnError(mDeviceBeingPaired < kNumMaxActiveDevices, CHIP_ERROR_INCORRECT_STATE);
Device * device = &mActiveDevices[mDeviceBeingPaired];
VerifyOrReturnError(device->GetDeviceId() == remoteDeviceId, CHIP_ERROR_INVALID_DEVICE_DESCRIPTOR);
FreeRendezvousSession();
ReleaseDevice(device);
mDeviceBeingPaired = kNumMaxActiveDevices;
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceCommissioner::UnpairDevice(NodeId remoteDeviceId)
{
// TODO: Send unpairing message to the remote device.
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
if (mDeviceBeingPaired < kNumMaxActiveDevices)
{
Device * device = &mActiveDevices[mDeviceBeingPaired];
if (device->GetDeviceId() == remoteDeviceId)
{
FreeRendezvousSession();
}
}
if (mStorageDelegate != nullptr)
{
PERSISTENT_KEY_OP(remoteDeviceId, kPairedDeviceKeyPrefix, key, mStorageDelegate->SyncDeleteKeyValue(key));
}
mPairedDevices.Remove(remoteDeviceId);
mPairedDevicesUpdated = true;
ReleaseDeviceById(remoteDeviceId);
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceCommissioner::OperationalDiscoveryComplete(NodeId remoteDeviceId)
{
ChipLogProgress(Controller, "OperationalDiscoveryComplete for device ID %" PRIu64, remoteDeviceId);
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
Device * device = nullptr;
ReturnErrorOnFailure(GetDevice(remoteDeviceId, &device));
device->OperationalCertProvisioned();
PersistDevice(device);
PersistNextKeyId();
return GetConnectedDevice(remoteDeviceId, &mOnDeviceConnectedCallback, &mOnDeviceConnectionFailureCallback);
}
CHIP_ERROR DeviceCommissioner::OpenCommissioningWindow(NodeId deviceId, uint16_t timeout, uint16_t iteration,
uint16_t discriminator, uint8_t option)
{
ChipLogProgress(Controller, "OpenCommissioningWindow for device ID %" PRIu64, deviceId);
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
Device * device = nullptr;
ReturnErrorOnFailure(GetDevice(deviceId, &device));
std::string QRCode;
std::string manualPairingCode;
SetupPayload payload;
Device::CommissioningWindowOption commissioningWindowOption;
ByteSpan salt(reinterpret_cast<const uint8_t *>(kSpake2pKeyExchangeSalt), strlen(kSpake2pKeyExchangeSalt));
payload.discriminator = discriminator;
switch (option)
{
case 0:
commissioningWindowOption = Device::CommissioningWindowOption::kOriginalSetupCode;
break;
case 1:
commissioningWindowOption = Device::CommissioningWindowOption::kTokenWithRandomPIN;
break;
case 2:
commissioningWindowOption = Device::CommissioningWindowOption::kTokenWithProvidedPIN;
break;
default:
ChipLogError(Controller, "Invalid Pairing Window option");
return CHIP_ERROR_INVALID_ARGUMENT;
}
ReturnErrorOnFailure(device->OpenCommissioningWindow(timeout, iteration, commissioningWindowOption, salt, payload));
if (commissioningWindowOption != Device::CommissioningWindowOption::kOriginalSetupCode)
{
ReturnErrorOnFailure(ManualSetupPayloadGenerator(payload).payloadDecimalStringRepresentation(manualPairingCode));
ChipLogProgress(Controller, "Manual pairing code: [%s]", manualPairingCode.c_str());
ReturnErrorOnFailure(QRCodeSetupPayloadGenerator(payload).payloadBase38Representation(QRCode));
ChipLogProgress(Controller, "SetupQRCode: [%s]", QRCode.c_str());
}
return CHIP_NO_ERROR;
}
void DeviceCommissioner::FreeRendezvousSession()
{
PersistNextKeyId();
}
void DeviceCommissioner::RendezvousCleanup(CHIP_ERROR status)
{
FreeRendezvousSession();
// TODO: make mStorageDelegate mandatory once all controller applications implement the interface.
if (mDeviceBeingPaired != kNumMaxActiveDevices && mStorageDelegate != nullptr)
{
// Let's release the device that's being paired.
// If pairing was successful, its information is
// already persisted. The application will use GetDevice()
// method to get access to the device, which will fetch
// the device information from the persistent storage.
DeviceController::ReleaseDevice(mDeviceBeingPaired);
}
mDeviceBeingPaired = kNumMaxActiveDevices;
if (mPairingDelegate != nullptr)
{
mPairingDelegate->OnPairingComplete(status);
}
}
void DeviceCommissioner::OnSessionEstablishmentError(CHIP_ERROR err)
{
mSystemState->SystemLayer()->CancelTimer(OnSessionEstablishmentTimeoutCallback, this);
if (mPairingDelegate != nullptr)
{
mPairingDelegate->OnStatusUpdate(DevicePairingDelegate::SecurePairingFailed);
}
RendezvousCleanup(err);
}
void DeviceCommissioner::OnSessionEstablished()
{
VerifyOrReturn(mDeviceBeingPaired < kNumMaxActiveDevices, OnSessionEstablishmentError(CHIP_ERROR_INVALID_DEVICE_DESCRIPTOR));
Device * device = &mActiveDevices[mDeviceBeingPaired];
// TODO: the session should know which peer we are trying to connect to when started
mPairingSession.SetPeerNodeId(device->GetDeviceId());
CHIP_ERROR err = mSystemState->SessionMgr()->NewPairing(
Optional<Transport::PeerAddress>::Value(mPairingSession.GetPeerAddress()), mPairingSession.GetPeerNodeId(),
&mPairingSession, CryptoContext::SessionRole::kInitiator, mFabricIndex);
if (err != CHIP_NO_ERROR)
{
ChipLogError(Controller, "Failed in setting up secure channel: err %s", ErrorStr(err));
OnSessionEstablishmentError(err);
return;
}
ChipLogDetail(Controller, "Remote device completed SPAKE2+ handshake");
// TODO: Add code to receive OpCSR from the device, and process the signing request
// For IP rendezvous, this is sent as part of the state machine.
#if CONFIG_USE_CLUSTERS_FOR_IP_COMMISSIONING
bool usingLegacyFlowWithImmediateStart = !mIsIPRendezvous;
#else
bool usingLegacyFlowWithImmediateStart = true;
#endif
if (usingLegacyFlowWithImmediateStart)
{
err = SendCertificateChainRequestCommand(device, CertificateType::kPAI);
if (err != CHIP_NO_ERROR)
{
ChipLogError(Ble, "Failed in sending 'Certificate Chain request' command to the device: err %s", ErrorStr(err));
OnSessionEstablishmentError(err);