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/*
* Copyright (c) 2017, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "transport_manager/iap2_emulation/iap2_transport_adapter.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include "utils/threads/thread.h"
#include "utils/file_system.h"
namespace {
static const mode_t mode = 0666;
static const auto in_signals_channel = "iap_signals_in";
static const auto out_signals_channel = "iap_signals_out";
} // namespace
namespace transport_manager {
namespace transport_adapter {
CREATE_LOGGERPTR_GLOBAL(logger_, "IAP2Emulation");
IAP2BluetoothEmulationTransportAdapter::IAP2BluetoothEmulationTransportAdapter(
const uint16_t port,
resumption::LastState& last_state,
const TransportManagerSettings& settings)
: TcpTransportAdapter(port, last_state, settings) {}
void IAP2BluetoothEmulationTransportAdapter::DeviceSwitched(
const DeviceUID& device_handle) {
LOG4CXX_AUTO_TRACE(logger_);
UNUSED(device_handle);
DCHECK(!"Switching for iAP2 Bluetooth is not supported.");
}
DeviceType IAP2BluetoothEmulationTransportAdapter::GetDeviceType() const {
return IOS_BT;
}
void IAP2BluetoothEmulationTransportAdapter::TransportConfigUpdated(
const TransportConfig& new_config) {
return;
}
IAP2USBEmulationTransportAdapter::IAP2USBEmulationTransportAdapter(
const uint16_t port,
resumption::LastState& last_state,
const TransportManagerSettings& settings)
: TcpTransportAdapter(port, last_state, settings), out_(0) {
auto delegate = new IAPSignalHandlerDelegate(*this);
signal_handler_ = threads::CreateThread("iAP signal handler", delegate);
signal_handler_->start();
const auto result = mkfifo(out_signals_channel, mode);
UNUSED(result);
LOG4CXX_DEBUG(logger_, "Out signals channel creation result: " << result);
}
IAP2USBEmulationTransportAdapter::~IAP2USBEmulationTransportAdapter() {
signal_handler_->join();
auto delegate = signal_handler_->delegate();
signal_handler_->set_delegate(NULL);
delete delegate;
threads::DeleteThread(signal_handler_);
LOG4CXX_DEBUG(logger_, "Out close result: " << close(out_));
LOG4CXX_DEBUG(logger_, "Out unlink result: " << unlink(out_signals_channel));
}
void IAP2USBEmulationTransportAdapter::DeviceSwitched(
const DeviceUID& device_handle) {
LOG4CXX_AUTO_TRACE(logger_);
UNUSED(device_handle);
const auto switch_signal_ack = std::string("SDL_TRANSPORT_SWITCH_ACK\n");
auto out_ = open(out_signals_channel, O_WRONLY);
LOG4CXX_DEBUG(logger_, "Out channel descriptor: " << out_);
if (out_ < 0) {
LOG4CXX_ERROR(logger_, "Failed to open out signals channel");
return;
}
const auto bytes =
write(out_, switch_signal_ack.c_str(), switch_signal_ack.size());
UNUSED(bytes);
LOG4CXX_DEBUG(logger_, "Written bytes to out: " << bytes);
LOG4CXX_DEBUG(logger_, "Switching signal ACK is sent");
LOG4CXX_DEBUG(logger_, "iAP2 USB device is switched with iAP2 Bluetooth");
close(out_);
}
DeviceType IAP2USBEmulationTransportAdapter::GetDeviceType() const {
return IOS_USB;
}
void IAP2USBEmulationTransportAdapter::TransportConfigUpdated(
const TransportConfig& new_config) {
return;
}
IAP2USBEmulationTransportAdapter::IAPSignalHandlerDelegate::
IAPSignalHandlerDelegate(IAP2USBEmulationTransportAdapter& adapter)
: adapter_(adapter), run_flag_(true), in_(0) {
const auto result = mkfifo(in_signals_channel, mode);
UNUSED(result);
LOG4CXX_DEBUG(logger_, "In signals channel creation result: " << result);
}
void IAP2USBEmulationTransportAdapter::IAPSignalHandlerDelegate::threadMain() {
LOG4CXX_AUTO_TRACE(logger_);
LOG4CXX_DEBUG(logger_, "Signal handling is started");
const auto switch_signal = "SDL_TRANSPORT_SWITCH";
LOG4CXX_DEBUG(logger_, "Waiting for signal: " << switch_signal);
in_ = open(in_signals_channel, O_RDONLY);
LOG4CXX_DEBUG(logger_, "In channel descriptor: " << in_);
if (in_ < 0) {
LOG4CXX_ERROR(logger_, "Failed to open in signals channel");
return;
}
const auto size = 32;
while (run_flag_) {
char buffer[size];
auto bytes = read(in_, &buffer, size - 1);
if (0 == bytes) {
continue;
}
if (-1 == bytes) {
LOG4CXX_DEBUG(logger_, "Error during input pipe read");
break;
}
LOG4CXX_DEBUG(logger_, "Read in bytes: " << bytes);
buffer[bytes] = '\0';
std::string str(buffer);
if (std::string::npos != str.find(switch_signal)) {
LOG4CXX_DEBUG(logger_, "Switch signal received.");
adapter_.DoTransportSwitch();
}
}
LOG4CXX_DEBUG(logger_, "In close result: " << close(in_));
LOG4CXX_DEBUG(logger_, "In unlink result: " << unlink(in_signals_channel));
}
void IAP2USBEmulationTransportAdapter::IAPSignalHandlerDelegate::
exitThreadMain() {
LOG4CXX_AUTO_TRACE(logger_);
LOG4CXX_DEBUG(logger_, "Stopping signal handling.");
run_flag_ = false;
ThreadDelegate::exitThreadMain();
}
}
} // namespace transport_manager::transport_adapter
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