1 files changed, 245 insertions, 0 deletions
diff --git a/device.cc b/device.cc
new file mode 100644
index 0000000..8ec05eb
--- /dev/null
+++ b/device.cc
@@ -0,0 +1,245 @@
+#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"
+#include "device.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};
+std::chrono::milliseconds Device::default_delay {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)
+    :
+      last_command_status(0),
+      m_vid(vid),
+      m_pid(pid),
+      m_model(model),
+      m_retry_sending_count(1),
+      m_retry_receiving_count(retry_receiving_count),
+      m_retry_timeout(retry_timeout),
+      m_send_receive_delay(send_receive_delay),
+      mp_devhandle(nullptr)
+{
+  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;
+#ifndef __APPLE__
+  if (instances_count == 1){
+    LOG(std::string("Calling hid_exit"), Loglevel::DEBUG_L2);
+    hid_exit();
+  }
+#endif
+  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 bool 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);
+
+  int send_feature_report = -1;
+
+  for (int i = 0; i < 3 && send_feature_report < 0; ++i) {
+    if (mp_devhandle == nullptr) {
+      LOG(std::string("Connection fail") , Loglevel::DEBUG_L2);
+      throw DeviceNotConnected("Attempted HID send on an invalid descriptor.");
+    }
+    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+1) + " / 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;
+
+  for (;;) {
+    if (mp_devhandle == nullptr){
+      LOG(std::string("Connection fail") , Loglevel::DEBUG_L2);
+      throw DeviceNotConnected("Attempted HID receive on an invalid descriptor.");
+    }
+
+    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;
+  }
+#ifndef __APPLE__
+  auto pInfo = hid_enumerate(m_vid, m_pid);
+  if (pInfo != nullptr){
+    hid_free_enumeration(pInfo);
+    return true;
+  }
+  return false;
+#else
+//  alternative for OSX
+  unsigned char buf[1];
+  return hid_read_timeout(mp_devhandle, buf, sizeof(buf), 20) != -1;
+#endif
+}
+
+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--;
+}
+
+void Device::set_default_device_speed(int delay) {
+  default_delay = std::chrono::duration<int, std::milli>(delay);
+}
+
+
+void Device::set_receiving_delay(const std::chrono::milliseconds delay){
+  std::lock_guard<std::mutex> lock(mex_dev_com);
+  m_send_receive_delay = delay;
+}
+
+void Device::set_retry_delay(const std::chrono::milliseconds delay){
+  std::lock_guard<std::mutex> lock(mex_dev_com);
+  m_retry_timeout = delay;
+}
+
+Stick10::Stick10():
+  Device(0x20a0, 0x4108, DeviceModel::PRO, 100ms, 5, 100ms)
+  {
+    setDefaultDelay();
+  }
+
+
+Stick20::Stick20():
+  Device(0x20a0, 0x4109, DeviceModel::STORAGE, 40ms, 25, 40ms)
+  {
+    setDefaultDelay();
+  }
+
+#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();
+}
+
+void Device::setDefaultDelay() {
+  LOG(__FUNCTION__, Loglevel::DEBUG_L2);
+
+  auto count = default_delay.count();
+  if (count != 0){
+    LOG("Setting default delay to " + std::to_string(count), Loglevel::DEBUG_L2);
+      m_retry_timeout = default_delay;
+      m_send_receive_delay = default_delay;
+    }
+}
+
+#undef p