blob: 811969ef0966ea2acc58fca72060d3822674db2a [file] [log] [blame]
/*
*
* Copyright (c) 2020-2021 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.
*/
/**
* @file
* This file implements the CHIP Connection object that maintains a BLE connection.
*
*/
#include <transport/raw/BLE.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/logging/CHIPLogging.h>
#include <transport/raw/MessageHeader.h>
#include <inttypes.h>
using namespace chip::Ble;
using namespace chip::System;
namespace chip {
namespace Transport {
BLEBase::~BLEBase()
{
ClearState();
}
void BLEBase::ClearState()
{
if (mBleLayer)
{
mBleLayer->CancelBleIncompleteConnection();
mBleLayer->mBleTransport = nullptr;
mBleLayer = nullptr;
}
if (mBleEndPoint)
{
mBleEndPoint->Close();
mBleEndPoint = nullptr;
}
mState = State::kNotReady;
}
CHIP_ERROR BLEBase::Init(const BleListenParameters & param)
{
BleLayer * bleLayer = param.GetBleLayer();
VerifyOrReturnError(mState == State::kNotReady, CHIP_ERROR_INCORRECT_STATE);
VerifyOrReturnError(bleLayer != nullptr, CHIP_ERROR_INCORRECT_STATE);
mBleLayer = bleLayer;
if (mBleLayer->mBleTransport == nullptr || !param.PreserveExistingBleLayerTransport())
{
mBleLayer->mBleTransport = this;
ChipLogDetail(Inet, "BLEBase::Init - setting/overriding transport");
}
else
{
ChipLogDetail(Inet, "BLEBase::Init - not overriding transport");
}
mState = State::kInitialized;
return CHIP_NO_ERROR;
}
CHIP_ERROR BLEBase::SetEndPoint(Ble::BLEEndPoint * endPoint)
{
VerifyOrReturnError(endPoint->mState == BLEEndPoint::kState_Connected, CHIP_ERROR_INVALID_ARGUMENT);
mBleEndPoint = endPoint;
// Manually trigger the OnConnectComplete callback.
OnEndPointConnectComplete(endPoint, CHIP_NO_ERROR);
return CHIP_NO_ERROR;
}
CHIP_ERROR BLEBase::SendMessage(const Transport::PeerAddress & address, System::PacketBufferHandle && msgBuf)
{
ReturnErrorCodeIf(address.GetTransportType() != Type::kBle, CHIP_ERROR_INVALID_ARGUMENT);
ReturnErrorCodeIf(mBleEndPoint == nullptr, CHIP_ERROR_INCORRECT_STATE);
ReturnErrorCodeIf(mState == State::kNotReady, CHIP_ERROR_INCORRECT_STATE);
if (mState == State::kConnected)
{
ReturnErrorOnFailure(mBleEndPoint->Send(std::move(msgBuf)));
}
else
{
ReturnErrorOnFailure(SendAfterConnect(std::move(msgBuf)));
}
return CHIP_NO_ERROR;
}
CHIP_ERROR BLEBase::SendAfterConnect(System::PacketBufferHandle && msg)
{
CHIP_ERROR err = CHIP_ERROR_NO_MEMORY;
for (size_t i = 0; i < mPendingPacketsSize; i++)
{
if (mPendingPackets[i].IsNull())
{
ChipLogDetail(Inet, "Message appended to BLE send queue");
mPendingPackets[i] = std::move(msg);
err = CHIP_NO_ERROR;
break;
}
}
return err;
}
void BLEBase::OnBleConnectionComplete(Ble::BLEEndPoint * endPoint)
{
CHIP_ERROR err = CHIP_NO_ERROR;
ChipLogDetail(Inet, "BleConnectionComplete: endPoint %p", endPoint);
mBleEndPoint = endPoint;
// Initiate CHIP over BLE protocol connection.
err = mBleEndPoint->StartConnect();
SuccessOrExit(err);
exit:
if (err != CHIP_NO_ERROR)
{
if (mBleEndPoint != nullptr)
{
mBleEndPoint->Close();
mBleEndPoint = nullptr;
}
ChipLogError(Inet, "Failed to setup BLE endPoint: %" CHIP_ERROR_FORMAT, err.Format());
}
}
void BLEBase::OnBleConnectionError(CHIP_ERROR err)
{
ClearPendingPackets();
ChipLogDetail(Inet, "BleConnection Error: %" CHIP_ERROR_FORMAT, err.Format());
}
void BLEBase::OnEndPointMessageReceived(BLEEndPoint * endPoint, PacketBufferHandle && buffer)
{
HandleMessageReceived(Transport::PeerAddress(Transport::Type::kBle), std::move(buffer));
}
void BLEBase::OnEndPointConnectComplete(BLEEndPoint * endPoint, CHIP_ERROR err)
{
mState = State::kConnected;
if (err != CHIP_NO_ERROR)
{
ChipLogError(Inet, "Failed to establish BLE connection: %" CHIP_ERROR_FORMAT, err.Format());
OnEndPointConnectionClosed(endPoint, err);
return;
}
for (size_t i = 0; i < mPendingPacketsSize; i++)
{
if (!mPendingPackets[i].IsNull())
{
err = endPoint->Send(std::move(mPendingPackets[i]));
if (err != CHIP_NO_ERROR)
{
ChipLogError(Inet, "Deferred sending failed: %" CHIP_ERROR_FORMAT, err.Format());
}
}
}
ChipLogDetail(Inet, "BLE EndPoint %p Connection Complete", endPoint);
}
void BLEBase::OnEndPointConnectionClosed(BLEEndPoint * endPoint, CHIP_ERROR err)
{
mState = State::kInitialized;
mBleEndPoint = nullptr;
ClearPendingPackets();
}
void BLEBase::ClearPendingPackets()
{
ChipLogDetail(Inet, "Clearing BLE pending packets.");
for (size_t i = 0; i < mPendingPacketsSize; i++)
{
mPendingPackets[i] = nullptr;
}
}
} // namespace Transport
} // namespace chip