ref: 7d7b5087d2288fc6e2493448968f7d786043b389
dir: /opl/ioperm_sys.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2002, 2003 Marcel Telka
// Copyright(C) 2009 Simon Howard
//
// 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.
//
// DESCRIPTION:
// Interface to the ioperm.sys driver, based on code from the
// Cygwin ioperm library.
//
//-----------------------------------------------------------------------------
#ifdef _WIN32
#include <stdio.h>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <winioctl.h>
#include <errno.h>
#include "ioperm_sys.h"
#define IOPERM_FILE L"\\\\.\\ioperm"
#define IOCTL_IOPERM \
CTL_CODE(FILE_DEVICE_UNKNOWN, 0xA00, METHOD_BUFFERED, FILE_ANY_ACCESS)
struct ioperm_data
{
unsigned long from;
unsigned long num;
int turn_on;
};
// Function pointers for advapi32.dll. This DLL does not exist on
// Windows 9x, so they are dynamically loaded from the DLL at runtime.
static SC_HANDLE WINAPI (*MyOpenSCManagerW)(wchar_t *lpMachineName,
wchar_t *lpDatabaseName,
DWORD dwDesiredAccess) = NULL;
static SC_HANDLE WINAPI (*MyCreateServiceW)(SC_HANDLE hSCManager,
wchar_t *lpServiceName,
wchar_t *lpDisplayName,
DWORD dwDesiredAccess,
DWORD dwServiceType,
DWORD dwStartType,
DWORD dwErrorControl,
wchar_t *lpBinaryPathName,
wchar_t *lpLoadOrderGroup,
LPDWORD lpdwTagId,
wchar_t *lpDependencies,
wchar_t *lpServiceStartName,
wchar_t *lpPassword);
static SC_HANDLE WINAPI (*MyOpenServiceW)(SC_HANDLE hSCManager,
wchar_t *lpServiceName,
DWORD dwDesiredAccess);
static BOOL WINAPI (*MyStartServiceW)(SC_HANDLE hService,
DWORD dwNumServiceArgs,
wchar_t **lpServiceArgVectors);
static BOOL WINAPI (*MyControlService)(SC_HANDLE hService,
DWORD dwControl,
LPSERVICE_STATUS lpServiceStatus);
static BOOL WINAPI (*MyCloseServiceHandle)(SC_HANDLE hSCObject);
static BOOL WINAPI (*MyDeleteService)(SC_HANDLE hService);
static struct
{
char *name;
void **fn;
} dll_functions[] = {
{ "OpenSCManagerW", (void **) &MyOpenSCManagerW },
{ "CreateServiceW", (void **) &MyCreateServiceW },
{ "OpenServiceW", (void **) &MyOpenServiceW },
{ "StartServiceW", (void **) &MyStartServiceW },
{ "ControlService", (void **) &MyControlService },
{ "CloseServiceHandle", (void **) &MyCloseServiceHandle },
{ "DeleteService", (void **) &MyDeleteService },
};
// Globals
static SC_HANDLE scm = NULL;
static SC_HANDLE svc = NULL;
static int service_was_created = 0;
static int service_was_started = 0;
static int LoadLibraryPointers(void)
{
HMODULE dll;
int i;
// Already loaded?
if (MyOpenSCManagerW != NULL)
{
return 1;
}
dll = LoadLibraryW(L"advapi32.dll");
if (dll == NULL)
{
fprintf(stderr, "LoadLibraryPointers: Failed to open advapi32.dll\n");
return 0;
}
for (i = 0; i < sizeof(dll_functions) / sizeof(*dll_functions); ++i)
{
*dll_functions[i].fn = GetProcAddress(dll, dll_functions[i].name);
if (*dll_functions[i].fn == NULL)
{
fprintf(stderr, "LoadLibraryPointers: Failed to get address "
"for '%s'\n", dll_functions[i].name);
return 0;
}
}
return 1;
}
int IOperm_EnablePortRange(unsigned int from, unsigned int num, int turn_on)
{
HANDLE h;
struct ioperm_data ioperm_data;
DWORD BytesReturned;
BOOL r;
h = CreateFileW(IOPERM_FILE, GENERIC_READ, 0, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (h == INVALID_HANDLE_VALUE)
{
errno = ENODEV;
return -1;
}
ioperm_data.from = from;
ioperm_data.num = num;
ioperm_data.turn_on = turn_on;
r = DeviceIoControl(h, IOCTL_IOPERM,
&ioperm_data, sizeof ioperm_data,
NULL, 0,
&BytesReturned, NULL);
if (!r)
{
errno = EPERM;
}
CloseHandle(h);
return r != 0;
}
// Load ioperm.sys driver.
// Returns 1 for success, 0 for failure.
// Remember to call IOperm_UninstallDriver to uninstall the driver later.
int IOperm_InstallDriver(void)
{
wchar_t driver_path[MAX_PATH];
int error;
int result = 1;
if (!LoadLibraryPointers())
{
return 0;
}
scm = MyOpenSCManagerW(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if (scm == NULL)
{
error = GetLastError();
fprintf(stderr, "IOperm_InstallDriver: OpenSCManager failed (%i).\n",
error);
return 0;
}
// Get the full path to the driver file.
GetFullPathNameW(L"ioperm.sys", MAX_PATH, driver_path, NULL);
// Create the service.
svc = MyCreateServiceW(scm,
L"ioperm",
L"ioperm support for Cygwin driver",
SERVICE_ALL_ACCESS,
SERVICE_KERNEL_DRIVER,
SERVICE_AUTO_START,
SERVICE_ERROR_NORMAL,
driver_path,
NULL,
NULL,
NULL,
NULL,
NULL);
if (svc == NULL)
{
error = GetLastError();
if (error != ERROR_SERVICE_EXISTS)
{
fprintf(stderr,
"IOperm_InstallDriver: Failed to create service (%i).\n",
error);
}
else
{
svc = MyOpenServiceW(scm, L"ioperm", SERVICE_ALL_ACCESS);
if (svc == NULL)
{
error = GetLastError();
fprintf(stderr,
"IOperm_InstallDriver: Failed to open service (%i).\n",
error);
}
}
if (svc == NULL)
{
MyCloseServiceHandle(scm);
return 0;
}
}
else
{
service_was_created = 1;
}
// Start the service. If the service already existed, it might have
// already been running as well.
if (!MyStartServiceW(svc, 0, NULL))
{
error = GetLastError();
if (error != ERROR_SERVICE_ALREADY_RUNNING)
{
fprintf(stderr, "IOperm_InstallDriver: Failed to start service (%i).\n",
error);
result = 0;
}
else
{
printf("IOperm_InstallDriver: ioperm driver already running.\n");
}
}
else
{
printf("IOperm_InstallDriver: ioperm driver installed.\n");
service_was_started = 1;
}
// If we failed to start the driver running, we need to clean up
// before finishing.
if (result == 0)
{
IOperm_UninstallDriver();
}
return result;
}
int IOperm_UninstallDriver(void)
{
SERVICE_STATUS stat;
int result = 1;
int error;
// If we started the service, stop it.
if (service_was_started)
{
if (!MyControlService(svc, SERVICE_CONTROL_STOP, &stat))
{
error = GetLastError();
if (error == ERROR_SERVICE_NOT_ACTIVE)
{
fprintf(stderr,
"IOperm_UninstallDriver: Service not active? (%i)\n",
error);
}
else
{
fprintf(stderr,
"IOperm_UninstallDriver: Failed to stop service (%i).\n",
error);
result = 0;
}
}
}
// If we created the service, delete it.
if (service_was_created)
{
if (!MyDeleteService(svc))
{
error = GetLastError();
fprintf(stderr,
"IOperm_UninstallDriver: DeleteService failed (%i).\n",
error);
result = 0;
}
else if (service_was_started)
{
printf("IOperm_UnInstallDriver: ioperm driver uninstalled.\n");
}
}
// Close handles.
if (svc != NULL)
{
MyCloseServiceHandle(svc);
svc = NULL;
}
if (scm != NULL)
{
MyCloseServiceHandle(scm);
scm = NULL;
}
service_was_created = 0;
service_was_started = 0;
return result;
}
#endif /* #ifndef _WIN32 */