[STABLE] contrib/npclient, proto/ft: revert

7 files changed, 665 insertions, 6 deletions

diff --git a/bin/NPClient.dll b/bin/NPClient.dll
index 912cd1a2..bf971c03 100644
--- a/bin/NPClient.dll
+++ b/bin/NPClient.dll
diff --git a/bin/NPClient64.dll b/bin/NPClient64.dll
index e8e01cfc..fd3164e5 100644
--- a/bin/NPClient64.dll
+++ b/bin/NPClient64.dll
diff --git a/contrib/very-important-source-code/npclient.c b/contrib/very-important-source-code/npclient.c
new file mode 100644
index 00000000..3878f809
--- /dev/null
+++ b/contrib/very-important-source-code/npclient.c
@@ -0,0 +1,587 @@
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <windows.h>
+#include <tchar.h>
+
+#define FREETRACK_MUTEX "FT_Mutext"
+#define FT_MM_DATA "FT_SharedMem"
+
+typedef struct TFreeTrackData {
+    int DataID;
+    int CamWidth;
+    int CamHeight;
+    float Yaw;
+    float Pitch;
+    float Roll;
+    float X;
+    float Y;
+    float Z;
+    float RawYaw;
+    float RawPitch;
+    float RawRoll;
+    float RawX;
+    float RawY;
+    float RawZ;
+    float X1;
+    float Y1;
+    float X2;
+    float Y2;
+    float X3;
+    float Y3;
+    float X4;
+    float Y4;
+} TFreeTrackData;
+
+typedef struct FTMemMap {
+    TFreeTrackData data;
+    __int32 GameId;
+    unsigned char table[8];
+    __int32 GameId2;
+} FTMemMap;
+
+static BOOL bEncryptionChecked = FALSE;
+static double r = 0, p = 0, y = 0, tx = 0, ty = 0, tz = 0;
+
+#define NP_DECLSPEC __declspec(dllexport)
+#define NP_EXPORT(t) t NP_DECLSPEC __stdcall
+#define NP_AXIS_MAX                             16383
+
+static BOOL FTCreateMapping(void);
+static void FTDestroyMapping(void);
+static __inline double scale2AnalogLimits( double x, double min_x, double max_x );
+static __inline double getDegreesFromRads ( double rads );
+
+#if DEBUG
+static FILE *debug_stream;
+#define dbg_report(...) do { if (debug_stream) { fprintf(debug_stream, __VA_ARGS__); fflush(debug_stream); } } while(0);
+#else
+#define dbg_report(...)
+#endif
+
+static HANDLE hFTMemMap = 0;
+static FTMemMap *pMemData = 0;
+static HANDLE hFTMutex = 0;
+static BOOL bEncryption = FALSE;
+static unsigned char table[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+typedef struct tir_data{
+    short status;
+    short frame;
+    unsigned int cksum;
+    float roll, pitch, yaw;
+    float tx, ty, tz;
+    float padding[9];
+} tir_data_t;
+
+typedef struct tir_signature{
+    char DllSignature[200];
+    char AppSignature[200];
+} tir_signature_t;
+
+BOOL DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{
+    switch (fdwReason) {
+    case DLL_PROCESS_ATTACH:
+#if DEBUG
+        debug_stream = fopen("c:\\NPClient.log", "a");
+#endif
+#ifdef _WIN64
+        dbg_report("\n= WIN64 =========================================================================================\n");
+#else
+        dbg_report("\n= WIN32 =========================================================================================\n");
+#endif
+        dbg_report("DllMain: (%p, %ld, %p)\n", (void*) hinstDLL, (long) fdwReason, lpvReserved);
+        dbg_report("DllMain: Attach request\n");
+        DisableThreadLibraryCalls(hinstDLL);
+        timeBeginPeriod(1);
+        break;
+
+    case DLL_PROCESS_DETACH:
+        dbg_report("DllMain: Detach\n");
+        dbg_report("DllMain: (%p, %ld, %p)\n", (void*) hinstDLL, (long) fdwReason, lpvReserved);
+        dbg_report("==========================================================================================\n");
+        timeEndPeriod(1);
+        FTDestroyMapping();
+        break;
+    }
+    return TRUE;
+}
+/******************************************************************
+ *              NPPriv_ClientNotify (NPCLIENT.1)
+ */
+
+NP_EXPORT(int) NPPriv_ClientNotify(void)
+{
+    dbg_report("stub\n");
+    /* @stub in .spec */
+    return 0;
+}
+/******************************************************************
+ *              NPPriv_GetLastError (NPCLIENT.2)
+ */
+
+NP_EXPORT(int) NPPriv_GetLastError(void)
+{
+    dbg_report("stub\n");
+    /* @stub in .spec */
+    return 0;
+}
+/******************************************************************
+ *              NPPriv_SetData (NPCLIENT.3)
+ */
+
+NP_EXPORT(int) NPPriv_SetData(void)
+{
+    dbg_report("stub\n");
+    /* @stub in .spec */
+    return 0;
+}
+/******************************************************************
+ *              NPPriv_SetLastError (NPCLIENT.4)
+ */
+
+NP_EXPORT(int) NPPriv_SetLastError(void)
+{
+    dbg_report("stub\n");
+    /* @stub in .spec */
+    return 0;
+}
+/******************************************************************
+ *              NPPriv_SetParameter (NPCLIENT.5)
+ */
+
+NP_EXPORT(int) NPPriv_SetParameter(void)
+{
+    dbg_report("stub\n");
+    /* @stub in .spec */
+    return 0;
+}
+/******************************************************************
+ *              NPPriv_SetSignature (NPCLIENT.6)
+ */
+
+NP_EXPORT(int) NPPriv_SetSignature(void)
+{
+    dbg_report("stub\n");
+    /* @stub in .spec */
+    return 0;
+}
+/******************************************************************
+ *              NPPriv_SetVersion (NPCLIENT.7)
+ */
+
+NP_EXPORT(int) NPPriv_SetVersion(void)
+{
+    dbg_report("stub\n");
+    /* @stub in .spec */
+    return 0;
+}
+
+/* TIR5 requires a checksum to be calculated over the headpose-data and to be relayed to the game. */
+static unsigned int cksum(unsigned char buf[], unsigned int size)
+{
+    int rounds = size >> 2;
+    int rem = size % 4;
+
+    int c = size;
+    int a0, a2;
+
+    if((size == 0) || (buf == NULL)){
+        return 0;
+    }
+
+    while(rounds != 0){
+        a0 = *(short int*)buf;
+        a2 = *(short int*)(buf+2);
+        buf += 4;
+        c += a0;
+        a2 ^= (c << 5);
+        a2 <<= 11;
+        c ^= a2;
+        c += (c >> 11);
+        --rounds;
+    }
+    switch(rem){
+    case 3:
+        a0 = *(short int*)buf;
+        a2 = *(signed char*)(buf+2);
+        c += a0;
+        a2 = (a2 << 2) ^ c;
+        c ^= (a2 << 16);
+        a2 = (c >> 11);
+        break;
+    case 2:
+        a2 = *(short int*)buf;
+        c += a2;
+        c ^= (c << 11);
+        a2 = (c >> 17);
+        break;
+    case 1:
+        a2 = *(signed char*)(buf);
+        c += a2;
+        c ^= (c << 10);
+        a2 = (c >> 1);
+        break;
+    default:
+        break;
+    }
+    if(rem != 0){
+        c+=a2;
+    }
+
+    c ^= (c << 3);
+    c += (c >> 5);
+    c ^= (c << 4);
+    c += (c >> 17);
+    c ^= (c << 25);
+    c += (c >> 6);
+
+    return (unsigned int)c;
+}
+
+static __inline void enhance(unsigned char buf[], unsigned int size,
+             unsigned char table[], int table_size)
+{
+  unsigned int table_ptr = 0;
+  unsigned char var = 0x88;
+  unsigned char tmp;
+  if((size <= 0) || (table_size <= 0) ||
+     (buf == NULL) || (table == NULL)){
+    return;
+  }
+  do{
+    tmp = buf[--size];
+    buf[size] = tmp ^ table[table_ptr] ^ var;
+    var += size + tmp;
+    ++table_ptr;
+    if(table_ptr >= table_size){
+      table_ptr -= table_size;
+    }
+  }while(size != 0);
+}
+
+/******************************************************************
+ *              NP_GetData (NPCLIENT.8)
+ */
+
+NP_EXPORT(int) NP_GetData(tir_data_t * data)
+{
+    static int frameno = 0;
+    int i;
+#if DEBUG
+    int recv = 0;
+#endif
+    if (!FTCreateMapping())
+    {
+        dbg_report("Can't open mapping\n");
+        return 0;
+    }
+
+    if (pMemData && hFTMutex && WaitForSingleObject(hFTMutex, 15) == WAIT_OBJECT_0) {
+#if DEBUG
+        recv = 1;
+#endif
+        y = getDegreesFromRads( pMemData->data.Yaw );
+        p = getDegreesFromRads( pMemData->data.Pitch );
+        r = getDegreesFromRads( pMemData->data.Roll );
+        tx = pMemData->data.X;
+        ty = pMemData->data.Y;
+        tz = pMemData->data.Z;
+
+        if (!bEncryptionChecked) {
+            dbg_report("NP_GetData: game = %d\n", pMemData->GameId);
+            memcpy(table, pMemData->table, 8);
+            for (i = 0; i < 8; i++)
+                if (table[i])
+                {
+                    bEncryption = TRUE;
+                    break;
+                }
+            dbg_report("NP_GetData: Table = %02d %02d %02d %02d %02d %02d %02d %02d\n", table[0],table[1],table[2],table[3],table[4],table[5], table[6], table[7]);
+            bEncryptionChecked = pMemData->GameId2 == pMemData->GameId;
+        }
+
+        ReleaseMutex(hFTMutex);
+    }
+
+    data->frame = frameno += 1;
+    data->status = 0;
+    data->cksum = 0;
+
+    data->roll  = scale2AnalogLimits (r, -180.0, 180.0);
+    data->pitch = scale2AnalogLimits (p, -180.0, 180.0);
+    data->yaw   = scale2AnalogLimits (y, -180.0, 180.0);
+
+    data->tx = scale2AnalogLimits (tx, -500.0, 500.0);
+    data->ty = scale2AnalogLimits (ty, -500.0, 500.0);
+    data->tz = scale2AnalogLimits (tz, -500.0, 500.0);
+
+    for(i = 0; i < 9; ++i) {
+        data->padding[i] = 0.0;
+    }
+
+#if DEBUG
+    dbg_report("GetData: rotation: %d %f %f %f\n", recv, data->yaw, data->pitch, data->roll);
+#endif
+
+    data->cksum = cksum((unsigned char*)data, sizeof(tir_data_t));
+
+    if(bEncryption) {
+        enhance((unsigned char*)data, sizeof(tir_data_t), table, sizeof(table));
+    }
+
+    return 0;
+}
+/******************************************************************
+ *              NP_GetParameter (NPCLIENT.9)
+ */
+
+NP_EXPORT(int) NP_GetParameter(int arg0, int arg1)
+{
+    dbg_report("GetParameter request: %d %d\n", arg0, arg1);
+    return (int) 0;
+}
+
+/******************************************************************
+ *              NP_GetSignature (NPCLIENT.10)
+ *
+ *
+ */
+
+static volatile unsigned char part2_2[200] = {
+    0xe3, 0xe5, 0x8e, 0xe8, 0x06, 0xd4, 0xab,
+    0xcf, 0xfa, 0x51, 0xa6, 0x84, 0x69, 0x52,
+    0x21, 0xde, 0x6b, 0x71, 0xe6, 0xac, 0xaa,
+    0x16, 0xfc, 0x89, 0xd6, 0xac, 0xe7, 0xf8,
+    0x7c, 0x09, 0x6a, 0x8b, 0x8b, 0x64, 0x0b,
+    0x7c, 0xc3, 0x61, 0x7f, 0xc2, 0x97, 0xd3,
+    0x33, 0xd9, 0x99, 0x59, 0xbe, 0xed, 0xdc,
+    0x2c, 0x5d, 0x93, 0x5c, 0xd4, 0xdd, 0xdf,
+    0x8b, 0xd5, 0x1d, 0x46, 0x95, 0xbd, 0x10,
+    0x5a, 0xa9, 0xd1, 0x9f, 0x71, 0x70, 0xd3,
+    0x94, 0x3c, 0x71, 0x5d, 0x53, 0x1c, 0x52,
+    0xe4, 0xc0, 0xf1, 0x7f, 0x87, 0xd0, 0x70,
+    0xa4, 0x04, 0x07, 0x05, 0x69, 0x2a, 0x16,
+    0x15, 0x55, 0x85, 0xa6, 0x30, 0xc8, 0xb6,
+    0x00
+};
+
+
+static volatile unsigned char part1_2[200] = {
+    0x6d, 0x0b, 0xab, 0x56, 0x74, 0xe6, 0x1c,
+    0xff, 0x24, 0xe8, 0x34, 0x8f, 0x00, 0x63,
+    0xed, 0x47, 0x5d, 0x9b, 0xe1, 0xe0, 0x1d,
+    0x02, 0x31, 0x22, 0x89, 0xac, 0x1f, 0xc0,
+    0xbd, 0x29, 0x13, 0x23, 0x3e, 0x98, 0xdd,
+    0xd0, 0x2a, 0x98, 0x7d, 0x29, 0xff, 0x2a,
+    0x7a, 0x86, 0x6c, 0x39, 0x22, 0x3b, 0x86,
+    0x86, 0xfa, 0x78, 0x31, 0xc3, 0x54, 0xa4,
+    0x78, 0xaa, 0xc3, 0xca, 0x77, 0x32, 0xd3,
+    0x67, 0xbd, 0x94, 0x9d, 0x7e, 0x6d, 0x31,
+    0x6b, 0xa1, 0xc3, 0x14, 0x8c, 0x17, 0xb5,
+    0x64, 0x51, 0x5b, 0x79, 0x51, 0xa8, 0xcf,
+    0x5d, 0x1a, 0xb4, 0x84, 0x9c, 0x29, 0xf0,
+    0xe6, 0x69, 0x73, 0x66, 0x0e, 0x4b, 0x3c,
+    0x7d, 0x99, 0x8b, 0x4e, 0x7d, 0xaf, 0x86,
+    0x92, 0xff
+};
+
+static volatile unsigned char part2_1[200] = {
+    0x8b, 0x84, 0xfc, 0x8c, 0x71, 0xb5, 0xd9,
+    0xaa, 0xda, 0x32, 0xc7, 0xe9, 0x0c, 0x20,
+    0x40, 0xd4, 0x4b, 0x02, 0x89, 0xca, 0xde,
+    0x61, 0x9d, 0xfb, 0xb3, 0x8c, 0x97, 0x8a,
+    0x13, 0x6a, 0x0f, 0xf8, 0xf8, 0x0d, 0x65,
+    0x1b, 0xe3, 0x05, 0x1e, 0xb6, 0xf6, 0xd9,
+    0x13, 0xad, 0xeb, 0x38, 0xdd, 0x86, 0xfc,
+    0x59, 0x2e, 0xf6, 0x2e, 0xf4, 0xb0, 0xb0,
+    0xfd, 0xb0, 0x70, 0x23, 0xfb, 0xc9, 0x1a,
+    0x50, 0x89, 0x92, 0xf0, 0x01, 0x09, 0xa1,
+    0xfd, 0x5b, 0x19, 0x29, 0x73, 0x59, 0x2b,
+    0x81, 0x83, 0x9e, 0x11, 0xf3, 0xa2, 0x1f,
+    0xc8, 0x24, 0x53, 0x60, 0x0a, 0x42, 0x78,
+    0x7a, 0x39, 0xea, 0xc1, 0x59, 0xad, 0xc5,
+    0x00
+};
+
+static volatile unsigned char part1_1[200] = {
+    0x1d, 0x79, 0xce, 0x35, 0x1d, 0x95, 0x79,
+    0xdf, 0x4c, 0x8d, 0x55, 0xeb, 0x20, 0x17,
+    0x9f, 0x26, 0x3e, 0xf0, 0x88, 0x8e, 0x7a,
+    0x08, 0x11, 0x52, 0xfc, 0xd8, 0x3f, 0xb9,
+    0xd2, 0x5c, 0x61, 0x03, 0x56, 0xfd, 0xbc,
+    0xb4, 0x0a, 0xf1, 0x13, 0x5d, 0x90, 0x0a,
+    0x0e, 0xee, 0x09, 0x19, 0x45, 0x5a, 0xeb,
+    0xe3, 0xf0, 0x58, 0x5f, 0xac, 0x23, 0x84,
+    0x1f, 0xc5, 0xe3, 0xa6, 0x18, 0x5d, 0xb8,
+    0x47, 0xdc, 0xe6, 0xf2, 0x0b, 0x03, 0x55,
+    0x61, 0xab, 0xe3, 0x57, 0xe3, 0x67, 0xcc,
+    0x16, 0x38, 0x3c, 0x11, 0x25, 0x88, 0x8a,
+    0x24, 0x7f, 0xf7, 0xeb, 0xf2, 0x5d, 0x82,
+    0x89, 0x05, 0x53, 0x32, 0x6b, 0x28, 0x54,
+    0x13, 0xf6, 0xe7, 0x21, 0x1a, 0xc6, 0xe3,
+    0xe1, 0xff
+};
+
+NP_EXPORT(int) NP_GetSignature(tir_signature_t * sig)
+{
+    int i;
+    dbg_report("GetSignature request\n");
+
+    for (i = 0; i < 200; i++)
+        sig->DllSignature[i] = part1_2[i] ^ part1_1[i];
+    for (i = 0; i < 200; i++)
+        sig->AppSignature[i] = part2_1[i] ^ part2_2[i];
+    memset(sig->DllSignature + strlen(sig->DllSignature), 0, 200 - strlen(sig->DllSignature));
+    memset(sig->AppSignature + strlen(sig->AppSignature), 0, 200 - strlen(sig->AppSignature));
+    return 0;
+}
+
+NP_EXPORT(int) NP_QueryVersion(unsigned short * version)
+{
+    dbg_report("QueryVersion request\n");
+    *version=0x0500;
+    return 0;
+}
+/******************************************************************
+ *              NP_ReCenter (NPCLIENT.12)
+ */
+
+NP_EXPORT(int) NP_ReCenter(void)
+{
+    dbg_report("ReCenter request\n");
+    return 0;
+}
+
+/******************************************************************
+ *              NP_RegisterProgramProfileID (NPCLIENT.13)
+ */
+
+NP_EXPORT(int) NP_RegisterProgramProfileID(unsigned short id)
+{
+    if (FTCreateMapping())
+        pMemData->GameId = id;
+    dbg_report("RegisterProgramProfileID request: %d\n", id);
+    return 0;
+}
+/******************************************************************
+ *              NP_RegisterWindowHandle (NPCLIENT.14)
+ */
+
+NP_EXPORT(int) NP_RegisterWindowHandle(HWND hwnd)
+{
+    dbg_report("RegisterWindowHandle request: %p\n", (void*) hwnd);
+    return (int) 0;
+}
+/******************************************************************
+ *              NP_RequestData (NPCLIENT.15)
+ */
+
+NP_EXPORT(int) NP_RequestData(unsigned short req)
+{
+    dbg_report("RequestData request: %d\n", req);
+    return (int) 0;
+}
+/******************************************************************
+ *              NP_SetParameter (NPCLIENT.16)
+ */
+
+NP_EXPORT(int) NP_SetParameter(int arg0, int arg1)
+{
+    dbg_report("SetParameter request: %d %d\n", arg0, arg1);
+    return (int) 0;
+}
+/******************************************************************
+ *              NP_StartCursor (NPCLIENT.17)
+ */
+
+NP_EXPORT(int) NP_StartCursor(void)
+{
+    dbg_report("StartCursor request\n");
+    return (int) 0;
+}
+/******************************************************************
+ *              NP_StartDataTransmission (NPCLIENT.18)
+ */
+
+NP_EXPORT(int) NP_StartDataTransmission(void)
+{
+    dbg_report("StartDataTransmission request.\n");
+
+    return (int) 0;
+}
+/******************************************************************
+ *              NP_StopCursor (NPCLIENT.19)
+ */
+
+NP_EXPORT(int) NP_StopCursor(void)
+{
+    dbg_report("StopCursor request\n");
+    return (int) 0;
+}
+/******************************************************************
+ *              NP_StopDataTransmission (NPCLIENT.20)
+ */
+
+NP_EXPORT(int) NP_StopDataTransmission(void)
+{
+    return (int) 0;
+}
+/******************************************************************
+ *              NP_UnregisterWindowHandle (NPCLIENT.21)
+ */
+
+NP_EXPORT(int) NP_UnregisterWindowHandle(void)
+{
+    dbg_report("UnregisterWindowHandle request\n");
+    return (int) 0;
+}
+
+static BOOL FTCreateMapping(void)
+{
+    BOOL bMappingExists = FALSE;
+
+    if (pMemData)
+        return TRUE;
+
+    dbg_report("FTCreateMapping request (pMemData == NULL).\n");
+
+    hFTMutex = CreateMutexA(NULL, FALSE, FREETRACK_MUTEX);
+    hFTMemMap = CreateFileMappingA( INVALID_HANDLE_VALUE, 00, PAGE_READWRITE, 0, sizeof( FTMemMap ), (LPCSTR) FT_MM_DATA );
+    pMemData = (FTMemMap *) MapViewOfFile(hFTMemMap, FILE_MAP_WRITE, 0, 0, sizeof( FTMemMap ) );
+    return pMemData != NULL && hFTMutex != NULL;
+}
+
+static void FTDestroyMapping(void)
+{
+    if ( pMemData != NULL ) {
+        UnmapViewOfFile ( pMemData );
+    }
+
+    CloseHandle( hFTMutex );
+    CloseHandle( hFTMemMap );
+    pMemData = 0;
+    hFTMemMap = 0;
+}
+
+static __inline double getDegreesFromRads ( double rads ) { 
+    return (rads * 57.295781);
+}
+
+static __inline double scale2AnalogLimits( double x, double min_x, double max_x ) {
+    double y;
+    double local_x;
+
+    local_x = x;
+    if (local_x > max_x) {
+        local_x = max_x;
+    }
+    if (local_x < min_x) {
+        local_x = min_x;
+    }
+    y = ( NP_AXIS_MAX * local_x ) / max_x;
+
+    return y;
+}
diff --git a/proto-ft/ftnoir_protocol_ft.cpp b/proto-ft/ftnoir_protocol_ft.cpp
index 0c97ffd2..ae8fe5a2 100644
--- a/proto-ft/ftnoir_protocol_ft.cpp
+++ b/proto-ft/ftnoir_protocol_ft.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2013-2018 Stanislaw Halik <sthalik@misaki.pl>
+/* Copyright (c) 2013-2015, 2017 Stanislaw Halik <sthalik@misaki.pl>
  * Copyright (c) 2015 Wim Vriend
  *
  * Permission to use, copy, modify, and/or distribute this software for any
@@ -97,10 +97,7 @@ void freetrack::pose(const double* headpose)
 
     const std::int32_t id = load(ft->GameID);
 
-    data_id++;
-    data_id %= 128;
-
-    store(data->DataID, 60 * 5 + data_id);
+    store(data->DataID, 60 * 10 + (rand() % 64));
 
     if (intGameID != id)
     {
diff --git a/proto-ft/ftnoir_protocol_ft.h b/proto-ft/ftnoir_protocol_ft.h
index 843d1f34..ac82bbd9 100644
--- a/proto-ft/ftnoir_protocol_ft.h
+++ b/proto-ft/ftnoir_protocol_ft.h
@@ -54,7 +54,6 @@ private:
     int intGameID = -1;
     QString connected_game;
     QMutex game_name_mutex;
-    unsigned data_id = 0;
 
     void start_dummy();
     static float degrees_to_rads(double degrees);
diff --git a/proto-ft/mutex.cpp b/proto-ft/mutex.cpp
new file mode 100644
index 00000000..a012ba90
--- /dev/null
+++ b/proto-ft/mutex.cpp
@@ -0,0 +1,60 @@
+#include "ftnoir_protocol_ft.h"
+#include "mutex.hpp"
+#include <windows.h>
+#include <QDebug>
+
+check_for_first_run::check_for_first_run() : checked_for_first_run(false), is_first_instance(false), enabled(false)
+{
+}
+
+bool check_for_first_run::is_first_run()
+{
+    return checked_for_first_run && is_first_instance;
+}
+
+void check_for_first_run::set_enabled(bool flag)
+{
+    enabled = flag;
+}
+
+void check_for_first_run::try_runonce()
+{
+    constexpr const char* name = "opentrack-freetrack-runonce";
+
+    if (checked_for_first_run)
+        return;
+
+    // just leak it, no issue
+    HANDLE h = CreateMutexA(nullptr, false, name);
+
+    switch (WaitForSingleObject(h, 0))
+    {
+    case WAIT_OBJECT_0:
+        is_first_instance = true;
+        checked_for_first_run = true;
+        break;
+    case WAIT_TIMEOUT:
+        checked_for_first_run = true;
+        break;
+    default:
+        checked_for_first_run = false;
+        break;
+    }
+
+    if (checked_for_first_run && !is_first_instance)
+        CloseHandle(h);
+}
+
+check_for_first_run::~check_for_first_run()
+{
+    try_exit();
+}
+
+void check_for_first_run::try_exit()
+{
+    if (is_first_instance && enabled)
+    {
+        qDebug() << "ft runonce: removing registry keys";
+        freetrack::set_protocols(false, false);
+    }
+}
diff --git a/proto-ft/mutex.hpp b/proto-ft/mutex.hpp
new file mode 100644
index 00000000..f92a14bf
--- /dev/null
+++ b/proto-ft/mutex.hpp
@@ -0,0 +1,16 @@
+#pragma once
+
+class check_for_first_run final
+{
+    bool checked_for_first_run;
+    bool is_first_instance;
+    bool enabled;
+    
+    void try_exit();
+public:
+    check_for_first_run();
+    bool is_first_run();
+    void set_enabled(bool flag);
+    void try_runonce();
+    ~check_for_first_run();
+};