夢織未來Windows驅動編程第03課驅動的編程規範

最近根據夢織未來論壇的驅動教程學習了一下Windows下的驅動編程，做個筆記備忘。這是第03課《驅動的編程規範》。驅動部分包括基本的驅動卸載函數、驅動打開關閉讀取寫入操作最簡單的分發常式。代碼如下： 1 //CreateDevice.c 2 //2016.07.14 3 4 #include "nt ...

最近根據夢織未來論壇的驅動教程學習了一下Windows下的驅動編程，做個筆記備忘。這是第03課《驅動的編程規範》。

驅動部分包括基本的驅動卸載函數、驅動打開關閉讀取寫入操作最簡單的分發常式。代碼如下：

  1 //CreateDevice.c
  2 //2016.07.14
  3 
  4 #include "ntddk.h"
  5 
  6 //驅動卸載函數Self
  7 VOID MyDriverUnload(PDRIVER_OBJECT pDriverObject)
  8 { 
  9     UNICODE_STRING usSymName;
 10     RtlInitUnicodeString(&usSymName, L"\\??\\FirstDevice");
 11     
 12     //先刪除符號鏈接，後刪除設備對象
 13     if (pDriverObject->DeviceObject != NULL)
 14     {
 15         IoDeleteSymbolicLink(&usSymName);                //刪除符號鏈接
 16         IoDeleteDevice(pDriverObject->DeviceObject);    //刪除設備對象
 17         KdPrint(("Delete Device Sucess."));
 18     }
 19 }
 20 
 21 //創建設備函數Self
 22 NTSTATUS CreateDevice(PDRIVER_OBJECT pDriverObject)
 23 {
 24     NTSTATUS Status;
 25     UNICODE_STRING usDevName;
 26     UNICODE_STRING usSymName;
 27     PDEVICE_OBJECT pDevObj;        //設備對象，用於指向創建的設備
 28     
 29     //DDK API    為UNICODE_STRING賦值的函數
 30     RtlInitUnicodeString(&usDevName, L"\\Device\\FirstDevice");
 31     
 32     //創建設備函數API    創建設備"\\Device\\FirstDevice"
 33     //設備創建後，會返回給pDevObj，同時給pDriverObject->DeviceObject賦值
 34     //The IoCreateDevice routine creates a device object for use by a driver.
 35     /*
 36         NTSTATUS IoCreateDevice(
 37         _In_     PDRIVER_OBJECT  DriverObject,
 38         _In_     ULONG           DeviceExtensionSize,
 39         _In_opt_ PUNICODE_STRING DeviceName,
 40         _In_     DEVICE_TYPE     DeviceType,
 41         _In_     ULONG           DeviceCharacteristics,
 42         _In_     BOOLEAN         Exclusive,
 43         _Out_    PDEVICE_OBJECT  *DeviceObject
 44         );
 45     */
 46     Status = IoCreateDevice(pDriverObject,         
 47                             0, 
 48                             &usDevName, 
 49                             FILE_DEVICE_UNKNOWN, 
 50                             FILE_DEVICE_SECURE_OPEN, 
 51                             TRUE, 
 52                             &pDevObj);
 53     if (!NT_SUCCESS(Status))    //檢查返回值
 54     {
 55         return Status;
 56     }
 57     
 58     //DO_BUFFERED_IO or DO_DIRECT_IO 
 59     //Specifies the type of buffering that is used by the I/O manager for I/O requests that are sent to the device stack. 
 60     //Higher-level drivers OR this member with the same value as the next-lower driver in the stack, except possibly for highest-level drivers.
 61     pDevObj->Flags |= DO_BUFFERED_IO;
 62     
 63     RtlInitUnicodeString(&usSymName, L"\\??\\FirstDevice");
 64     
 65     //The IoCreateSymbolicLink routine sets up a symbolic link between a device object name and a user-visible name for the device.
 66     /*
 67         NTSTATUS IoCreateSymbolicLink(
 68         _In_ PUNICODE_STRING SymbolicLinkName,
 69         _In_ PUNICODE_STRING DeviceName
 70         );
 71     */
 72     Status = IoCreateSymbolicLink(&usSymName, &usDevName);    //DDK API    創建符號鏈接
 73     if (!NT_SUCCESS(Status))
 74     {
 75         IoDeleteDevice(pDevObj);    //刪除設備對象
 76         return Status;
 77     }
 78     
 79     return STATUS_SUCCESS; 
 80 }
 81 
 82 //打開設備的函數
 83 NTSTATUS CreateCompleteRoutine(PDRIVER_OBJECT pDriverObject, PIRP pIrp)
 84 {
 85     NTSTATUS Status;
 86     
 87     Status = STATUS_SUCCESS;
 88     
 89     KdPrint(("Create"));
 90     
 91     //A driver sets an IRP's I/O status block to indicate the final status of an I/O request, before calling IoCompleteRequest for the IRP.
 92     
 93     //This is the completion status, either STATUS_SUCCESS if the requested operation was completed successfully or an informational, warning, or error STATUS_ XXX value.
 94     //For more information, see Using NTSTATUS values.
 95     pIrp->IoStatus.Status = Status;
 96     //This is the completion status, either STATUS_SUCCESS if the requested operation was completed successfully or an informational, warning, or error STATUS_ XXX value. 
 97     //For more information, see Using NTSTATUS values.
 98     pIrp->IoStatus.Information = 0;
 99     
100     //The IoCompleteRequest routine indicates that the caller has completed all processing for a given I/O request and is returning the given IRP to the I/O manager.
101     //IO_NO_INCREMENT 不再往下層傳遞
102     IoCompleteRequest(pIrp, IO_NO_INCREMENT);
103     return Status;
104 }
105 
106 //關閉設備的函數
107 NTSTATUS CloseCompleteRoutine(PDRIVER_OBJECT pDriverObject, PIRP pIrp)
108 {
109     NTSTATUS Status;
110 
111     Status = STATUS_SUCCESS;
112 
113     KdPrint(("Close"));
114 
115     pIrp->IoStatus.Status = Status;
116     pIrp->IoStatus.Information = 0;
117 
118     IoCompleteRequest(pIrp, IO_NO_INCREMENT);
119     return Status;
120 }
121 
122 //讀取設備的函數
123 NTSTATUS ReadCompleteRoutine(PDRIVER_OBJECT pDriverObject, PIRP pIrp)
124 {
125     NTSTATUS Status;
126 
127     Status = STATUS_SUCCESS;
128 
129     KdPrint(("Read"));
130 
131     pIrp->IoStatus.Status = Status;
132     pIrp->IoStatus.Information = 0;
133 
134     IoCompleteRequest(pIrp, IO_NO_INCREMENT);
135     return Status;
136 }
137 
138 //寫入設備的函數
139 NTSTATUS WriteCompleteRoutine(PDRIVER_OBJECT pDriverObject, PIRP pIrp)
140 {
141     NTSTATUS Status;
142 
143     Status = STATUS_SUCCESS;
144 
145     KdPrint(("Write"));
146 
147     pIrp->IoStatus.Status = Status;
148     pIrp->IoStatus.Information = 0;
149 
150     IoCompleteRequest(pIrp, IO_NO_INCREMENT);
151     return Status;
152 }
153 
154 //驅動程式入口函數
155 NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObject, PUNICODE_STRING pRegistryPath)
156 {
157     //輸出信息
158     //DbgPrint("1111");
159 
160     
161     NTSTATUS Status;
162     Status = CreateDevice(pDriverObject);    //創建設備對象和符號鏈接
163     if (!NT_SUCCESS(Status))
164     {
165         KdPrint(("Create Device Failed."));
166     } else {
167         KdPrint(("Create Device Sucess."));
168         KdPrint(("%wZ", pRegistryPath));
169     }
170         
171     //打開關閉讀取寫入的分發常式賦值
172     pDriverObject->MajorFunction[IRP_MJ_CREATE] = (PDRIVER_DISPATCH)CreateCompleteRoutine;    //打開設備
173     pDriverObject->MajorFunction[IRP_MJ_CLOSE]    = (PDRIVER_DISPATCH)CloseCompleteRoutine;    //關閉設備
174     pDriverObject->MajorFunction[IRP_MJ_READ]    = (PDRIVER_DISPATCH)ReadCompleteRoutine;    //讀取設備
175     pDriverObject->MajorFunction[IRP_MJ_WRITE]    = (PDRIVER_DISPATCH)WriteCompleteRoutine;    //寫入設備
176     
177     //驅動卸載函數賦值
178     pDriverObject->DriverUnload = MyDriverUnload;
179 
180     return STATUS_SUCCESS;
181 }

CreateDevice.c

應用層採用了MFC創建了一個視窗，視窗有三個按鈕:Create、Read、Write。界面如下：

其中Create按鈕的處理函數如下：

 1 void CCheckMyDriverDlg::OnCreateButton()
 2 {
 3     // TODO: 在此添加控制項通知處理程式代碼
 4     HANDLE hFile = CreateFileW(L"\\\\.\\FirstDevice", 
 5                 FILE_ALL_ACCESS, 
 6                 0, 
 7                 NULL,
 8                 OPEN_EXISTING,
 9                 FILE_ATTRIBUTE_NORMAL,
10                 NULL);
11     if (hFile == INVALID_HANDLE_VALUE)
12     {
13         AfxMessageBox (L"Open Device Failed.");
14         return;
15     }
16 
17     CloseHandle (hFile);
18 }

Read按鈕的處理函數如下：

 1 void CCheckMyDriverDlg::OnReadButton()
 2 {
 3     // TODO: 在此添加控制項通知處理程式代碼
 4     HANDLE hFile = CreateFileW(L"\\\\.\\FirstDevice", 
 5         FILE_ALL_ACCESS, 
 6         0, 
 7         NULL,
 8         OPEN_EXISTING,
 9         FILE_ATTRIBUTE_NORMAL,
10         NULL);
11     if (hFile == INVALID_HANDLE_VALUE)
12     {
13         AfxMessageBox (L"Open Device Failed.");
14         return;
15     }
16 
17     wchar_t Buffer[MAX_PATH] = {0};
18     DWORD len = 0;
19     if (!ReadFile (hFile, Buffer, MAX_PATH-1, &len, NULL))
20     {
21         AfxMessageBox (L"Read Device Failed.");
22         return;
23     }
24 
25     CloseHandle (hFile);
26 
27 }

Write按鈕的處理函數如下：

 1 void CCheckMyDriverDlg::OnWriteButton()
 2 {
 3     // TODO: 在此添加控制項通知處理程式代碼
 4     HANDLE hFile = CreateFileW(L"\\\\.\\FirstDevice", 
 5         FILE_ALL_ACCESS, 
 6         0, 
 7         NULL,
 8         OPEN_EXISTING,
 9         FILE_ATTRIBUTE_NORMAL,
10         NULL);
11     if (hFile == INVALID_HANDLE_VALUE)
12     {
13         AfxMessageBox (L"Open Device Failed.");
14         return;
15     }
16 
17     wchar_t Buffer[MAX_PATH] = L"What The Fuck, Man ?";
18     DWORD len;
19     if (!WriteFile (hFile, Buffer, MAX_PATH, &len, NULL))
20     {
21         AfxMessageBox (L"Write Device Failed.");
22         return;
23     }
24 
25     CloseHandle (hFile);
26 
27 }