mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-11-10 08:38:20 +00:00
301 lines
7.6 KiB
C
301 lines
7.6 KiB
C
/*
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Looking Glass - KVM FrameRelay (KVMFR) Client
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Copyright (C) 2017-2019 Geoffrey McRae <geoff@hostfission.com>
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https://looking-glass.hostfission.com
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <windows.h>
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#include <setupapi.h>
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#include "app.h"
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#include "debug.h"
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#include "windebug.h"
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#include "ivshmem/Public.h"
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static HANDLE shmemHandle = INVALID_HANDLE_VALUE;
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static bool shmemOwned = false;
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static IVSHMEM_MMAP shmemMap = {0};
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static HWND messageWnd;
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struct osThreadHandle
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{
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const char * name;
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osThreadFunction function;
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void * opaque;
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HANDLE handle;
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DWORD threadID;
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int resultCode;
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};
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LRESULT CALLBACK DummyWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
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{
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switch(msg)
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{
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case WM_CLOSE:
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DestroyWindow(hwnd);
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break;
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case WM_DESTROY:
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PostQuitMessage(0);
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break;
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default:
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return DefWindowProc(hwnd, msg, wParam, lParam);
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}
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return 0;
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}
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static int appThread(void * opaque)
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{
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int result = app_main();
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SendMessage(messageWnd, WM_CLOSE, 0, 0);
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return result;
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}
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int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
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{
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int result = 0;
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HDEVINFO deviceInfoSet;
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PSP_DEVICE_INTERFACE_DETAIL_DATA infData = NULL;
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SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
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#if 0
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// redirect stderr to a file
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{
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char tempPath[MAX_PATH+1];
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GetTempPathA(sizeof(tempPath), tempPath);
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int len = snprintf(NULL, 0, "%slooking-glass-host.txt", tempPath);
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char * path = malloc(len + 1);
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sprintf(path, "%slooking-glass-host.txt", tempPath);
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freopen(path, "a", stderr);
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free(path);
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}
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#endif
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// always flush stderr
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setbuf(stderr, NULL);
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deviceInfoSet = SetupDiGetClassDevs(NULL, NULL, NULL, DIGCF_PRESENT | DIGCF_ALLCLASSES | DIGCF_DEVICEINTERFACE);
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memset(&deviceInterfaceData, 0, sizeof(SP_DEVICE_INTERFACE_DATA));
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deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
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if (SetupDiEnumDeviceInterfaces(deviceInfoSet, NULL, &GUID_DEVINTERFACE_IVSHMEM, 0, &deviceInterfaceData) == FALSE)
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{
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DWORD error = GetLastError();
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if (error == ERROR_NO_MORE_ITEMS)
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{
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DEBUG_WINERROR("Unable to enumerate the device, is it attached?", error);
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result = -1;
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goto finish;
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}
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DEBUG_WINERROR("SetupDiEnumDeviceInterfaces failed", error);
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result = -1;
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goto finish;
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}
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DWORD reqSize = 0;
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SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, NULL, 0, &reqSize, NULL);
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if (!reqSize)
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{
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DEBUG_WINERROR("SetupDiGetDeviceInterfaceDetail", GetLastError());
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result = -1;
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goto finish;
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}
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infData = (PSP_DEVICE_INTERFACE_DETAIL_DATA)calloc(reqSize, 1);
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infData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
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if (!SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, infData, reqSize, NULL, NULL))
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{
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free(infData);
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DEBUG_WINERROR("SetupDiGetDeviceInterfaceDetail", GetLastError());
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result = -1;
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goto finish;
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}
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shmemHandle = CreateFile(infData->DevicePath, 0, 0, NULL, OPEN_EXISTING, 0, 0);
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if (shmemHandle == INVALID_HANDLE_VALUE)
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{
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SetupDiDestroyDeviceInfoList(deviceInfoSet);
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free(infData);
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DEBUG_WINERROR("CreateFile returned INVALID_HANDLE_VALUE", GetLastError());
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result = -1;
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goto finish;
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}
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free(infData);
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SetupDiDestroyDeviceInfoList(deviceInfoSet);
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// create a message window so that our message pump works
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WNDCLASSEX wx = {};
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wx.cbSize = sizeof(WNDCLASSEX);
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wx.lpfnWndProc = DummyWndProc;
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wx.hInstance = hInstance;
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wx.lpszClassName = "DUMMY_CLASS";
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if (!RegisterClassEx(&wx))
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{
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DEBUG_ERROR("Failed to register message window class");
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result = -1;
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goto finish_shmem;
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}
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messageWnd = CreateWindowEx(0, "DUMMY_CLASS", "DUMMY_NAME", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
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osThreadHandle * thread;
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if (!os_createThread("appThread", appThread, NULL, &thread))
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{
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DEBUG_ERROR("Failed to create the main application thread");
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result = -1;
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goto finish_shmem;
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}
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while(true)
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{
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MSG msg;
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BOOL bRet = GetMessage(&msg, NULL, 0, 0);
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if (bRet > 0)
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{
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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else if (bRet < 0)
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{
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DEBUG_ERROR("Unknown error from GetMessage");
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result = -1;
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goto shutdown;
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}
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DEBUG_INFO("Platform shutdown");
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break;
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}
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shutdown:
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app_quit();
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if (!os_joinThread(thread, &result))
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{
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DEBUG_ERROR("Failed to join the main application thread");
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result = -1;
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}
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finish_shmem:
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os_shmemUnmap();
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CloseHandle(shmemHandle);
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finish:
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return result;
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}
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unsigned int os_shmemSize()
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{
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IVSHMEM_SIZE size;
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if (!DeviceIoControl(shmemHandle, IOCTL_IVSHMEM_REQUEST_SIZE, NULL, 0, &size, sizeof(IVSHMEM_SIZE), NULL, NULL))
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{
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DEBUG_WINERROR("DeviceIoControl Failed", GetLastError());
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return 0;
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}
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return (unsigned int)size;
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}
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bool os_shmemMmap(void **ptr)
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{
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if (shmemOwned)
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{
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*ptr = shmemMap.ptr;
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return true;
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}
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memset(&shmemMap, 0, sizeof(IVSHMEM_MMAP));
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if (!DeviceIoControl(
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shmemHandle,
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IOCTL_IVSHMEM_REQUEST_MMAP,
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NULL, 0,
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&shmemMap, sizeof(IVSHMEM_MMAP),
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NULL, NULL))
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{
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DEBUG_WINERROR("DeviceIoControl Failed", GetLastError());
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return false;
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}
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*ptr = shmemMap.ptr;
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shmemOwned = true;
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return true;
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}
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void os_shmemUnmap()
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{
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if (!shmemOwned)
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return;
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if (!DeviceIoControl(shmemHandle, IOCTL_IVSHMEM_RELEASE_MMAP, NULL, 0, NULL, 0, NULL, NULL))
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DEBUG_WINERROR("DeviceIoControl failed", GetLastError());
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else
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shmemOwned = false;
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}
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static DWORD WINAPI threadWrapper(LPVOID lpParameter)
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{
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osThreadHandle * handle = (osThreadHandle *)lpParameter;
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handle->resultCode = handle->function(handle->opaque);
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return 0;
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}
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bool os_createThread(const char * name, osThreadFunction function, void * opaque, osThreadHandle ** handle)
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{
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*handle = (osThreadHandle *)malloc(sizeof(osThreadHandle));
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(*handle)->name = name;
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(*handle)->function = function;
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(*handle)->opaque = opaque;
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(*handle)->handle = CreateThread(NULL, 0, threadWrapper, *handle, 0, &(*handle)->threadID);
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if (!(*handle)->handle)
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{
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free(*handle);
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*handle = NULL;
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DEBUG_WINERROR("CreateThread failed", GetLastError());
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return false;
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}
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return true;
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}
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bool os_joinThread(osThreadHandle * handle, int * resultCode)
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{
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while(true)
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{
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switch(WaitForSingleObject(handle->handle, INFINITE))
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{
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case WAIT_OBJECT_0:
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if (resultCode)
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*resultCode = handle->resultCode;
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CloseHandle(handle->handle);
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free(handle);
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return true;
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case WAIT_ABANDONED:
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case WAIT_TIMEOUT:
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continue;
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case WAIT_FAILED:
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DEBUG_WINERROR("Wait for thread failed", GetLastError());
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CloseHandle(handle->handle);
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free(handle);
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return false;
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}
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break;
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}
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DEBUG_WINERROR("Unknown failure waiting for thread", GetLastError());
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return false;
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} |