[c-host] initial ivshmem code and platform specific init

c-host/windows/platform.c

@@ -0,0 +1,121 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <windows.h>
+#include <setupapi.h>
+
+#include "app.h"
+#include "debug.h"
+#include "windebug.h"
+#include "ivshmem/Public.h"
+
+static HANDLE shmemHandle = INVALID_HANDLE_VALUE;
+
+int WINAPI WinMain(HINSTANCE hInstnace, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
+{
+  HDEVINFO                         deviceInfoSet;
+  PSP_DEVICE_INTERFACE_DETAIL_DATA infData = NULL;
+  SP_DEVICE_INTERFACE_DATA         deviceInterfaceData;
+
+  deviceInfoSet = SetupDiGetClassDevs(NULL, NULL, NULL, DIGCF_PRESENT | DIGCF_ALLCLASSES | DIGCF_DEVICEINTERFACE);
+  memset(&deviceInterfaceData, 0, sizeof(SP_DEVICE_INTERFACE_DATA));
+  deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
+
+  if (SetupDiEnumDeviceInterfaces(deviceInfoSet, NULL, &GUID_DEVINTERFACE_IVSHMEM, 0, &deviceInterfaceData) == FALSE)
+  {
+    DWORD error = GetLastError();
+    if (error == ERROR_NO_MORE_ITEMS)
+    {
+      DEBUG_WINERROR("Unable to enumerate the device, is it attached?", error);
+      return -1;
+    }
+
+    DEBUG_WINERROR("SetupDiEnumDeviceInterfaces failed", error);
+    return -1;
+  }
+
+  DWORD reqSize = 0;
+  SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, NULL, 0, &reqSize, NULL);
+  if (!reqSize)
+  {
+    DEBUG_WINERROR("SetupDiGetDeviceInterfaceDetail", GetLastError());
+    return -1;
+  }
+
+  infData         = (PSP_DEVICE_INTERFACE_DETAIL_DATA)calloc(reqSize, 1);
+  infData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
+  if (!SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, infData, reqSize, NULL, NULL))
+  {
+    free(infData);
+    DEBUG_WINERROR("SetupDiGetDeviceInterfaceDetail", GetLastError());
+    return -1;
+  }
+
+  shmemHandle = CreateFile(infData->DevicePath, 0, 0, NULL, OPEN_EXISTING, 0, 0);
+  if (shmemHandle == INVALID_HANDLE_VALUE)
+  {
+    SetupDiDestroyDeviceInfoList(deviceInfoSet);
+    free(infData);
+    DEBUG_WINERROR("CreateFile returned INVALID_HANDLE_VALUE", GetLastError());
+    return -1;
+  }
+
+  free(infData);
+  SetupDiDestroyDeviceInfoList(deviceInfoSet);
+
+  int result = app_main();
+
+  CloseHandle(shmemHandle);
+  return result;
+}
+
+unsigned int os_shmemSize()
+{
+  IVSHMEM_SIZE size;
+  if (!DeviceIoControl(shmemHandle, IOCTL_IVSHMEM_REQUEST_SIZE, NULL, 0, &size, sizeof(IVSHMEM_SIZE), NULL, NULL))
+  {
+    DEBUG_WINERROR("DeviceIoControl Failed", GetLastError());
+    return 0;
+  }
+
+  return (unsigned int)size;
+}
+
+bool os_shmemMmap(void **ptr)
+{
+  IVSHMEM_MMAP map = {0};
+
+  if (!DeviceIoControl(
+    shmemHandle,
+    IOCTL_IVSHMEM_REQUEST_MMAP,
+    NULL, 0,
+    &map, sizeof(IVSHMEM_MMAP),
+    NULL, NULL))
+  {
+    DEBUG_WINERROR("DeviceIoControl Failed", GetLastError());
+    return false;
+  }
+
+  *ptr = map.ptr;
+  return true;
+}
+
+void os_shmemUnmap()
+{
+}

c-host/windows/windebug.c

@@ -0,0 +1,42 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include "windebug.h"
+#include <stdio.h>
+
+void DebugWinError(const char * file, const unsigned int line, const char * function, const char * desc, HRESULT status)
+{
+  char *buffer;
+  FormatMessageA(
+    FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER,
+    NULL,
+    status,
+    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+    (char*)&buffer,
+    1024,
+    NULL
+  );
+
+  for(size_t i = strlen(buffer) - 1; i > 0; --i)
+    if (buffer[i] == '\n' || buffer[i] == '\r')
+      buffer[i] = 0;
+
+  fprintf(stderr, "[E] %20s:%-4u | %-30s | %s: 0x%08x (%s)\n", file, line, function, desc, (int)status, buffer);
+  LocalFree(buffer);
+}

c-host/windows/windebug.h

@@ -0,0 +1,27 @@
+/*
+Looking Glass - KVM FrameRelay (KVMFR) Client
+Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
+https://looking-glass.hostfission.com
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#pragma once
+
+#include "debug.h"
+#include <windows.h>
+
+void DebugWinError(const char * file, const unsigned int line, const char * function, const char * desc, HRESULT status);
+
+#define DEBUG_WINERROR(x, y) DebugWinError(STRIPPATH(__FILE__), __LINE__, __FUNCTION__, x, y)