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#include <chrono>
#include <thread>
#include <cstddef>
#include <stdexcept>
#include "hidapi/hidapi.h"
#include "include/misc.h"
#include "include/device.h"
#include "include/log.h"
#include <mutex>
#include "DeviceCommunicationExceptions.h"
std::mutex mex_dev_com;
using namespace nitrokey::device;
using namespace nitrokey::log;
using namespace std::chrono;
std::atomic_int Device::instances_count{0};
Device::Device(const uint16_t vid, const uint16_t pid, const DeviceModel model,
const milliseconds send_receive_delay, const int retry_receiving_count,
const milliseconds retry_timeout)
: m_vid(vid),
m_pid(pid),
m_retry_sending_count(3),
m_retry_receiving_count(retry_receiving_count),
m_retry_timeout(retry_timeout),
mp_devhandle(nullptr),
last_command_status(0),
m_model(model),
m_send_receive_delay(send_receive_delay)
{
instances_count++;
}
bool Device::disconnect() {
//called in object's destructor
LOG(__FUNCTION__, Loglevel::DEBUG_L2);
std::lock_guard<std::mutex> lock(mex_dev_com);
return _disconnect();
}
bool Device::_disconnect() {
LOG(std::string(__FUNCTION__) + std::string(m_model == DeviceModel::PRO ? "PRO" : "STORAGE"), Loglevel::DEBUG_L2);
LOG(std::string(__FUNCTION__) + std::string(" *IN* "), Loglevel::DEBUG_L2);
LOG(std::string("Disconnection success: ") + std::to_string(mp_devhandle == nullptr), Loglevel::DEBUG_L2);
if(mp_devhandle == nullptr) return false;
hid_close(mp_devhandle);
mp_devhandle = nullptr;
if (instances_count == 1){
LOG(std::string("Calling hid_exit"), Loglevel::DEBUG_L2);
hid_exit();
}
return true;
}
bool Device::connect() {
LOG(__FUNCTION__, Loglevel::DEBUG_L2);
std::lock_guard<std::mutex> lock(mex_dev_com);
return _connect();
}
bool Device::_connect() {
LOG(std::string(__FUNCTION__) + std::string(" *IN* "), Loglevel::DEBUG_L2);
// hid_init(); // done automatically on hid_open
mp_devhandle = hid_open(m_vid, m_pid, nullptr);
const auto success = mp_devhandle != nullptr;
LOG(std::string("Connection success: ") + std::to_string(success), Loglevel::DEBUG_L2);
return success;
}
int Device::send(const void *packet) {
LOG(__FUNCTION__, Loglevel::DEBUG_L2);
std::lock_guard<std::mutex> lock(mex_dev_com);
LOG(std::string(__FUNCTION__) + std::string(" *IN* "), Loglevel::DEBUG_L2);
if (mp_devhandle == nullptr) {
LOG(std::string("Connection fail") , Loglevel::DEBUG_L2);
throw DeviceNotConnected("Attempted HID send on an invalid descriptor.");
}
int send_feature_report = -1;
for (int i = 0; i < 3 && send_feature_report < 0; ++i) {
send_feature_report = hid_send_feature_report(
mp_devhandle, (const unsigned char *)(packet), HID_REPORT_SIZE);
if (send_feature_report < 0) _reconnect();
//add thread sleep?
LOG(std::string("Sending attempt: ")+std::to_string(i) + " / 3" , Loglevel::DEBUG_L2);
}
return send_feature_report;
}
int Device::recv(void *packet) {
LOG(__FUNCTION__, Loglevel::DEBUG_L2);
std::lock_guard<std::mutex> lock(mex_dev_com);
LOG(std::string(__FUNCTION__) + std::string(" *IN* "), Loglevel::DEBUG_L2);
int status;
int retry_count = 0;
if (mp_devhandle == nullptr){
LOG(std::string("Connection fail") , Loglevel::DEBUG_L2);
throw DeviceNotConnected("Attempted HID receive on an invalid descriptor.");
}
for (;;) {
status = (hid_get_feature_report(mp_devhandle, (unsigned char *)(packet),
HID_REPORT_SIZE));
auto pwherr = hid_error(mp_devhandle);
std::wstring wherr = (pwherr != nullptr) ? pwherr : L"No error message";
std::string herr(wherr.begin(), wherr.end());
LOG(std::string("libhid error message: ") + herr,
Loglevel::DEBUG_L2);
if (status > 0) break; // success
if (retry_count++ >= m_retry_receiving_count) {
LOG(
"Maximum retry count reached: " + std::to_string(retry_count),
Loglevel::WARNING);
LOG(
std::string("Counter stats: ") + m_counters.get_as_string(),
Loglevel::DEBUG);
break;
}
_reconnect();
LOG("Retrying... " + std::to_string(retry_count),
Loglevel::DEBUG);
std::this_thread::sleep_for(m_retry_timeout);
}
return status;
}
bool Device::could_be_enumerated() {
LOG(__FUNCTION__, Loglevel::DEBUG_L2);
std::lock_guard<std::mutex> lock(mex_dev_com);
if (mp_devhandle==nullptr){
return false;
}
auto pInfo = hid_enumerate(m_vid, m_pid);
if (pInfo != nullptr){
hid_free_enumeration(pInfo);
return true;
}
return false;
// alternative:
// unsigned char buf[1];
// return hid_read_timeout(mp_devhandle, buf, sizeof(buf), 20) != -1;
}
void Device::show_stats() {
auto s = m_counters.get_as_string();
LOG(s, Loglevel::DEBUG_L2);
}
void Device::_reconnect() {
LOG(__FUNCTION__, Loglevel::DEBUG_L2);
++m_counters.low_level_reconnect;
_disconnect();
_connect();
}
Device::~Device() {
show_stats();
disconnect();
instances_count--;
}
Stick10::Stick10():
Device(0x20a0, 0x4108, DeviceModel::PRO, 100ms, 5, 100ms)
{}
Stick20::Stick20():
Device(0x20a0, 0x4109, DeviceModel::STORAGE, 200ms, 5, 200ms)
{}
#include <sstream>
#define p(x) ss << #x << " " << x << ", ";
std::string Device::ErrorCounters::get_as_string() {
std::stringstream ss;
p(total_comm_runs);
p(communication_successful);
ss << "(";
p(command_successful_recv);
p(command_result_not_equal_0_recv);
ss << "), ";
p(sends_executed);
p(recv_executed);
p(successful_storage_commands);
p(total_retries);
ss << "(";
p(busy);
p(busy_progressbar);
p(CRC_other_than_awaited);
p(wrong_CRC);
ss << "), ";
p(low_level_reconnect);
p(sending_error);
p(receiving_error);
return ss.str();
}
#undef p
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