在Win8系统下开发驱动程序，需要数字证书，还需要驱动签名认证。不能像XP下面那样疯狂滴耍流氓了。

由于Win8系统的内核做了大幅度的修改，它和XP系统的内核起了很大的变化，最显著的就是刚才说的：需要签名和证书。  还有就是：不能随意的HOOK SSDT了。

在开发NDIS驱动程序的时候，WDK开发包提供了一个新的框架，叫着NDIS Filter
NDIS Filter是一个例子工程。
假入我把WDK安装在E盘，那么这个工程代码就在：
C:\WinDDK\8600.16385.1\src\network\ndis\filter目录下。

把这个例子工程和原来的Passthru工程代码做比较，您会发现，原来需要导出来的2种类型的回调函数MiniportXXX和ProtocolXXX 在新的框架里面被全部隐藏起来了。
微软提供了新的函数。 一起来看看，微软提供了什么。
在这里，为了方便分析， 我把函数代码都做了功能注释，请大家一起看看。
代码如下：

#pragma NDIS_INIT_FUNCTION(DriverEntry)#define LITTLE_ENDIAN   (1)//// Global variables// NDIS_HANDLE         FilterDriverHandle; // NDIS handle for filter driverNDIS_HANDLE         FilterDriverObject;NDIS_HANDLE         NdisFilterDeviceHandle = NULL;PDEVICE_OBJECT      DeviceObject = NULL;FILTER_LOCK         FilterListLock;LIST_ENTRY          FilterModuleList;PWCHAR              InstanceStrings = NULL;NDIS_FILTER_PARTIAL_CHARACTERISTICS DefaultChars = {{ 0, 0, 0},      0,      FilterSendNetBufferLists,      FilterSendNetBufferListsComplete,      NULL,      FilterReceiveNetBufferLists,      FilterReturnNetBufferLists};    typedef struct in_addr {  union {    struct { UCHAR s_b1,s_b2,s_b3,s_b4; } S_un_b;    struct { USHORT s_w1,s_w2; } S_un_w;    ULONG S_addr;  } S_un;} IN_ADDR, *PIN_ADDR, FAR *LPIN_ADDR;#pragma push(1)typedef struct IP_HEADER{#if LITTLE_ENDIAN  unsigned char  ip_hl:4;    /* 头长度 */  unsigned char  ip_v:4;      /* 版本号 */#else  unsigned char   ip_v:4;  unsigned char   ip_hl:4;     #endif  unsigned char  TOS;           // 服务类型  unsigned short   TotLen;      // 封包总长度，即整个IP包的长度  unsigned short   ID;          // 封包标识，唯一标识发送的每一个数据报  unsigned short   FlagOff;     // 标志  unsigned char  TTL;           // 生存时间，就是TTL  unsigned char  Protocol;      // 协议，可能是TCP、UDP、ICMP等  unsigned short Checksum;      // 校验和  struct in_addr        iaSrc;  // 源IP地址  struct in_addr        iaDst;  // 目的PI地址}IP_HEADER, *PIP_HEADER;typedef struct tcp_header{  unsigned short src_port;    //源端口号  unsigned short dst_port;    //目的端口号  unsigned int   seq_no;      //序列号  unsigned int   ack_no;      //确认号#if LITTLE_ENDIAN  unsigned char reserved_1:4; //保留6位中的4位首部长度  unsigned char thl:4;    //tcp头部长度  unsigned char flag:6;  //6位标志  unsigned char reseverd_2:2; //保留6位中的2位#else  unsigned char thl:4;    //tcp头部长度  unsigned char reserved_1:4; //保留6位中的4位首部长度  unsigned char reseverd_2:2; //保留6位中的2位  unsigned char flag:6;  //6位标志 #endif  unsigned short wnd_size;   //16位窗口大小  unsigned short chk_sum;    //16位TCP检验和  unsigned short urgt_p;     //16为紧急指针}TCP_HEADER,*PTCP_HEADER;typedef struct udp_header {  USHORT srcport;   // 源端口  USHORT dstport;   // 目的端口  USHORT total_len; // 包括UDP报头及UDP数据的长度(单位:字节)  USHORT chksum;    // 校验和}UDP_HEADER,*PUDP_HEADER;#pragma push()#define IP_OFFSET                               0x0E//IP 协议类型#define PROT_ICMP                               0x01 #define PROT_TCP                                0x06 #define PROT_UDP                                0x11 USHORT UTIL_htons( USHORT hostshort ){  PUCHAR  pBuffer;  USHORT  nResult;  nResult = 0;  pBuffer = (PUCHAR )&hostshort;  nResult = ( (pBuffer[ 0 ] << 8) & 0xFF00) | (pBuffer[ 1 ] & 0x00FF);  return( nResult );}/*UTIL_ntohs把网络字节顺序转换成主机字节顺序*/USHORT UTIL_ntohs( USHORT netshort ){  return( UTIL_htons( netshort ) );}NTSTATUS DriverEntry(IN  PDRIVER_OBJECT  DriverObject, IN  PUNICODE_STRING   RegistryPath){    NDIS_STATUS                             Status;    NDIS_FILTER_DRIVER_CHARACTERISTICS      FChars;    NDIS_STRING                             ServiceName;    NDIS_STRING                             UniqueName;    NDIS_STRING                             FriendlyName;    BOOLEAN                                 bFalse = FALSE;    UNREFERENCED_PARAMETER(RegistryPath);        DEBUGP(DL_TRACE,("===>DriverEntry...\n"));       RtlInitUnicodeString(&ServiceName, FILTER_SERVICE_NAME);    RtlInitUnicodeString(&FriendlyName, FILTER_FRIENDLY_NAME);    RtlInitUnicodeString(&UniqueName, FILTER_UNIQUE_NAME);    FilterDriverObject = DriverObject;        do    {        NdisZeroMemory(&FChars, sizeof(NDIS_FILTER_DRIVER_CHARACTERISTICS));  /*大多数的NDIS6.0数据结构中包含的对象头结构的成员，即NDIS_OBJECT_HEADER结构。对象头有三个成员：类型，大小和修改。如果头信息是不正确的，那么调用NDIS6.0函数将失败。*/        FChars.Header.Type =          NDIS_OBJECT_TYPE_FILTER_DRIVER_CHARACTERISTICS;        FChars.Header.Size = sizeof(NDIS_FILTER_DRIVER_CHARACTERISTICS);        FChars.Header.Revision = NDIS_FILTER_CHARACTERISTICS_REVISION_1;        FChars.MajorNdisVersion = FILTER_MAJOR_NDIS_VERSION;        FChars.MinorNdisVersion = FILTER_MINOR_NDIS_VERSION;        FChars.MajorDriverVersion = 1;        FChars.MinorDriverVersion = 0;        FChars.Flags = 0;        FChars.FriendlyName = FriendlyName;        FChars.UniqueName = UniqueName;        FChars.ServiceName = ServiceName;            /******************************************************NDIS_FILTER_DRIVER_CHARACTERISTICS结构中Mandatory例程******************************************************/        FChars.AttachHandler = FilterAttach;        FChars.DetachHandler = FilterDetach;        FChars.RestartHandler = FilterRestart;        FChars.PauseHandler = FilterPause;/************************************************************NDIS_FILTER_DRIVER_CHARACTERISTICS结构中Optional且不能在运行时变更的例程*************************************************************/        FChars.SetOptionsHandler = FilterRegisterOptions;        FChars.SetFilterModuleOptionsHandler = FilterSetModuleOptions;        FChars.OidRequestHandler = FilterOidRequest;        FChars.OidRequestCompleteHandler = FilterOidRequestComplete;        FChars.StatusHandler = FilterStatus;       FChars.DevicePnPEventNotifyHandler = FilterDevicePnPEventNotify;       FChars.NetPnPEventHandler = FilterNetPnPEvent;            FChars.CancelSendNetBufferListsHandler = FilterCancelSendNetBufferLists;/**************************************************************DIS_FILTER_DRIVER_CHARACTERISTICS结构中Optional且能在运行时变更的例程。        下面这4个例程也被定义在NDIS_FILTER_PARTIAL_CHARACTERISTICS中,这个结构指定的例程可以在运行时的FilterSetModuleOptions例程中调用NdisSetOptionHandles来改变。如果过滤驱动要在例程中修改自身的一个特性,那么必须提供FilterSetModuleOptions例程。****************************************************************/        FChars.SendNetBufferListsHandler = FilterSendNetBufferLists;     FChars.SendNetBufferListsCompleteHandler = FilterSendNetBufferListsComplete;        FChars.ReturnNetBufferListsHandler = FilterReturnNetBufferLists;        FChars.ReceiveNetBufferListsHandler = FilterReceiveNetBufferLists;       ///        FChars.CancelOidRequestHandler = FilterCancelOidRequest;                      DriverObject->DriverUnload = FilterUnload;            FilterDriverHandle = NULL;        FILTER_INIT_LOCK(&FilterListLock);        InitializeListHead(&FilterModuleList);          // 把Filter驱动注册给NDIS        Status = NdisFRegisterFilterDriver(DriverObject,                                           (NDIS_HANDLE)FilterDriverObject,                                           &FChars,                                            &FilterDriverHandle);        if (Status != NDIS_STATUS_SUCCESS)        {            DEBUGP(DL_WARN, ("MSFilter: Register filter driver failed.\n"));             break;        }        //        // Initilize spin locks        //        Status = FilterRegisterDevice();        if (Status != NDIS_STATUS_SUCCESS)        {            NdisFDeregisterFilterDriver(FilterDriverHandle);            FILTER_FREE_LOCK(&FilterListLock);            DEBUGP(DL_WARN, ("MSFilter: Register device for the filter driver failed.\n"));             break;        }            }     while(bFalse);            DEBUGP(DL_TRACE, ("<===DriverEntry, Status = %8x\n", Status));    return Status;    }//过滤驱动注册可选服务NDIS_STATUSFilterRegisterOptions(        IN NDIS_HANDLE  NdisFilterDriverHandle, //它指向了这个过滤驱动        IN NDIS_HANDLE  FilterDriverContext     //它是这个驱动的上下文        ){    DEBUGP(DL_TRACE, ("===>FilterRegisterOptions\n"));        ASSERT(NdisFilterDriverHandle == FilterDriverHandle);    ASSERT(FilterDriverContext == (NDIS_HANDLE)FilterDriverObject);    if ((NdisFilterDriverHandle != (NDIS_HANDLE)FilterDriverHandle) ||        (FilterDriverContext != (NDIS_HANDLE)FilterDriverObject))    {        return NDIS_STATUS_INVALID_PARAMETER;    }    DEBUGP(DL_TRACE, ("<===FilterRegisterOptions\n"));    return (NDIS_STATUS_SUCCESS);}    /***************************************************************  FilterAttach函数的功能:   Attaching状态表示：一个Filter Driver正准备附加一个Filter Module到一个驱动栈上。   一个过滤驱动进入Attaching状态下不能进行发送请求、接收指示、状态指示、OID请求操作。   当一个过滤驱动进入Attaching状态时，它可以:   (1)创建一个环境上下文区域并且初始化一个缓冲区池以及其Filter Module特点的资源。  (2)用NDIS 传来给Filter Attach的NdisFilterHandle作为输入来调用NdisFSetAttributes例程。   Attach is complete   当Filter Module在Attaching状态下并且Filter Driver初始化了所有的Filter Module所需要的   所有资源时,Filter Module进入Paused状态。   参数说明：    NdisFilterHandle     它用于所有过滤驱动中对Ndisxxx类例程的调用时引用指示这个过滤模块。    FilterDriverContext  它由NdisFRegisterFilterDriver的FilterDriverContext来指定。    AttachParameters     它是过滤模块的初始化参数结构体。 **************************************************************/NDIS_STATUSFilterAttach(    IN  NDIS_HANDLE                     NdisFilterHandle,    IN  NDIS_HANDLE                     FilterDriverContext,    IN  PNDIS_FILTER_ATTACH_PARAMETERS  AttachParameters    ){    PMS_FILTER              pFilter = NULL;    NDIS_STATUS             Status = NDIS_STATUS_SUCCESS;    NDIS_FILTER_ATTRIBUTES  FilterAttributes;    ULONG                   Size;    BOOLEAN               bFalse = FALSE;        DEBUGP(DL_TRACE, ("===>FilterAttach: NdisFilterHandle %p\n", NdisFilterHandle));    do    {        ASSERT(FilterDriverContext == (NDIS_HANDLE)FilterDriverObject);        if (FilterDriverContext != (NDIS_HANDLE)FilterDriverObject)        {            Status = NDIS_STATUS_INVALID_PARAMETER;            break;        }                if ((AttachParameters->MiniportMediaType != NdisMedium802_3)                && (AttachParameters->MiniportMediaType != NdisMediumWan))        {           DEBUGP(DL_ERROR, ("MSFilter: Doesn't support media type other than NdisMedium802_3.\n"));                    Status = NDIS_STATUS_INVALID_PARAMETER;           break;        }                Size = sizeof(MS_FILTER) +                AttachParameters->FilterModuleGuidName->Length +                AttachParameters->BaseMiniportInstanceName->Length +                AttachParameters->BaseMiniportName->Length;                pFilter = (PMS_FILTER)FILTER_ALLOC_MEM(NdisFilterHandle, Size);        if (pFilter == NULL)        {            DEBUGP(DL_WARN, ("MSFilter: Failed to allocate context structure.\n"));            Status = NDIS_STATUS_RESOURCES;            break;        }                NdisZeroMemory(pFilter, sizeof(MS_FILTER));        pFilter->FilterModuleName.Length = pFilter->FilterModuleName.MaximumLength = AttachParameters->FilterModuleGuidName->Length;        pFilter->FilterModuleName.Buffer = (PWSTR)((PUCHAR)pFilter + sizeof(MS_FILTER));        NdisMoveMemory(pFilter->FilterModuleName.Buffer,                         AttachParameters->FilterModuleGuidName->Buffer,                        pFilter->FilterModuleName.Length);                pFilter->MiniportFriendlyName.Length = pFilter->MiniportFriendlyName.MaximumLength = AttachParameters->BaseMiniportInstanceName->Length;        pFilter->MiniportFriendlyName.Buffer = (PWSTR)((PUCHAR)pFilter->FilterModuleName.Buffer + pFilter->FilterModuleName.Length);          NdisMoveMemory(pFilter->MiniportFriendlyName.Buffer,                        AttachParameters->BaseMiniportInstanceName->Buffer,                        pFilter->MiniportFriendlyName.Length);                pFilter->MiniportName.Length = pFilter->MiniportName.MaximumLength = AttachParameters->BaseMiniportName->Length;        pFilter->MiniportName.Buffer = (PWSTR)((PUCHAR)pFilter->MiniportFriendlyName.Buffer +                                                    pFilter->MiniportFriendlyName.Length);        NdisMoveMemory(pFilter->MiniportName.Buffer,                         AttachParameters->BaseMiniportName->Buffer,                        pFilter->MiniportName.Length);        pFilter->MiniportIfIndex = AttachParameters->BaseMiniportIfIndex;              pFilter->TrackReceives = TRUE;        pFilter->TrackSends = TRUE;        pFilter->FilterHandle = NdisFilterHandle;        NdisZeroMemory(&FilterAttributes, sizeof(NDIS_FILTER_ATTRIBUTES));        FilterAttributes.Header.Revision = NDIS_FILTER_ATTRIBUTES_REVISION_1;        FilterAttributes.Header.Size = sizeof(NDIS_FILTER_ATTRIBUTES);        FilterAttributes.Header.Type = NDIS_OBJECT_TYPE_FILTER_ATTRIBUTES;        FilterAttributes.Flags = 0;        Status = NdisFSetAttributes(NdisFilterHandle,                                     pFilter, //pFilter参数的功能是，为过滤模块指定环境上下文                                    &FilterAttributes);        if (Status != NDIS_STATUS_SUCCESS)        {            DEBUGP(DL_WARN, ("MSFilter: Failed to set attributes.\n"));            break;        }                pFilter->State = FilterPaused;        FILTER_ACQUIRE_LOCK(&FilterListLock, bFalse);        InsertHeadList(&FilterModuleList, &pFilter->FilterModuleLink);        FILTER_RELEASE_LOCK(&FilterListLock, bFalse);            }    while (bFalse);        if (Status != NDIS_STATUS_SUCCESS)    {        if (pFilter != NULL)        {            FILTER_FREE_MEM(pFilter);        }    }        DEBUGP(DL_TRACE, ("<===FilterAttach:    Status %x\n", Status));    return Status;}/**************************************************************  FilterPause函数的功能:   Paused状态：在这种状态下，Filter Driver不能执行接收和发送操作。   当FilterDriver执行FilterPause全程时它就进入了Pausing状态。   Pausing状态：在这种状态下,Filter Driver要为一个Filter Module完成停止发送和接收   处理所需要的所有准备工作。   一个在Pausing状态的Filter Driver有如下的约束：   (1)Filter Module不能发起任何新的接收指示,但可以传递下层驱动的接收指示。   (2)如果有Filter Module发起的接收指示还没有完成,那么必须等到它们全部完成。有只当      FilterReturnNetBufferLists完成所有外部接收指示后,暂停操作才能完成。   (3)要返回任何未处理的由下层驱动引发的接收指示给NDIS,只有等到NdisFReturnNetBufferLists返回了所有未处理的接收指示后暂停操作才能完成。这里也可以排队缓冲这些未完成的接收指示。   (4)立即用NdisFReturnNetBufferLists返回所有下层驱动新传来的接收指示,如果需要可以在返回之前制和排队这些接收指示。   (5)不能发起任何新的发送请求。   (6)如果有Filter Driver引的但NDIS还未完成的发送操作,必须等待它们完成。   (8)应该在FilterSendNetBufferLists例程中立即调用NdisFSendNetBufferListsComplete返回那些新达到的发送请求。并且为每一个NET_BUFFER_LIST设置NDIS_STATUS_PAUSED返回状态。   (8)这时可以使用NdisFIndicateStatus提供状态指示。   (9)可以在FilterStatus中处理状态指示。   (10)可以在FilterOidRequest里面处理OID请求。   (11)可以发起一个OID操作。   (12)不能释放分配的相关资源,和Filter Module相关的资源最好放在FilterDetach例程里面来释放。   (13)如果有用于发送和接收的定时器那么要停止它。   当成功停止发送和接收操作后就必须完成暂停操作。暂停操作的完成可以是同步的也可以是异步的。   若返回值是NDIS_STATUS_SUCCESS则，是同步。   若是异步，则返回NDIS_STATUS_PENDING。那么还必须调用NdisFPauseComplete函数。   暂停操作完成了以后,Filter Module进入了Paused状态。这里它有如下的约束：   (1)不能发起任何接收指示,但可以传递底层驱动发来的接收指示。   (2)需要立即调用NdisFReturnNetBufferLists返回底层驱动的接收指示给NDIS,如果需要可以在返回之前复制和排队这些接收指示。   (3)不能引发任何新的发送指示。   (4)需要立即调用NdisFSendNetBufferListsComplete完成那些在FilterSendNetBufferLists中收到的发送请求，并为每一个NET_BUFFER_LIST设置NDIS_STATUS_PAUSED返回状态。   (5)这时可以使用NdisFIndicateStatus发起状态指示。   (6)可以在FilterStatus中进行状态指示处理。   (8)可以在FilterOidRequest里面处理OID请求。   (8)可以发起一个OID请求。   在Filter Module进行Pausing状态时NDIS不会发起其它PnP操作，比如:附加、分离、重启。只有当Filter Module进入了Paused状态后NDIS才能对它进行分离和重启操作。 ***************************************************************/NDIS_STATUSFilterPause(        IN  NDIS_HANDLE                     FilterModuleContext,        IN  PNDIS_FILTER_PAUSE_PARAMETERS   PauseParameters        ){    PMS_FILTER          pFilter = (PMS_FILTER)(FilterModuleContext);    NDIS_STATUS         Status;    BOOLEAN               bFalse = FALSE;    UNREFERENCED_PARAMETER(PauseParameters);        DEBUGP(DL_TRACE, ("===>NDISLWF FilterPause: FilterInstance %p\n", FilterModuleContext));         FILTER_ASSERT(pFilter->State == FilterRunning);         FILTER_ACQUIRE_LOCK(&pFilter->Lock, bFalse);    pFilter->State = FilterPausing;    FILTER_RELEASE_LOCK(&pFilter->Lock, bFalse);    Status = NDIS_STATUS_SUCCESS;        pFilter->State = FilterPaused;        DEBUGP(DL_TRACE, ("<===FilterPause:  Status %x\n", Status));    return Status;}/***************************************************************  FilterRestart函数的功能:   在Restarting状态下,一个Filter Driver必须为一个Filter Module完成重启发送和接收数据时   所需要的所有准备工作。   Restart is complete    当Filter Module在Restarting状态下并且完成所有发送和接收所需要的准备工作时,Filter Module就进入了Running状态。要启动一个Paused状态的Filter Module,如果有FilterSetModuleOptions就先调用它,接着调用FilterRestart。  当Filter Module在Restarting状态下,它可以:  (1)完成任何正常的发送和接收所需要的准备工作。  (2)可读写Filter Module的配置参数。  (3)可以接收网络数据指示,拷贝和排队数据稍后只是给上层驱动或者丢弃数据。  (4)不能发起任何新的接收指示。  (5)应该立即调用NdisFSendNetBufferListsComplete例程来拒绝FilterSendNetBufferLists传来的发送的请求。应该设置每一个NET_BUFFER_LIST的完成状态为NDIS_STATUS_PAUSED                (6)可以使用NdisFIndicateStatus例程进行状态指示。  (8)可以控制OID请求操作。  (8)不能发起任何新的发送请求。  (9)应该调用NdisFReturnNetBufferLists返回所有新的接收指示。如果需要的话可以在接收指示返回之前拷贝它们。  (10)可以制作OID请求发送给下层驱动设置或查询配置信息。  (11)可以在FilterStatus中控制状态指示。  (12)返回时指示 NDIS_STATUS_SUCCESS 或失败状态,如果不Filter Module不能启动返回了失败，而它又是一个Mandatory的Filter Driver 那个 NDIS将会结束这个驱动栈在一个Filter Driver完成对发送和接收的重启后必须指示完成这个重启操作。 Filter Driver的重启操作的完成可以是同步也可以是异步的，同步时返回 NDIS_STATUS_SUCCESS 异步时返回NDIS_STATUS_PENDING。如果返回的是 NDIS_STATUS_PENDING 就必须调用NdisFRestartComplete 例程在重启操作完成后。在这种情况下，驱动需要传递给NdisFRestartComplete 一个固定状态(标识重启结果的成功或失败状态)。重启操作完成Filter Module就进入了 Running状态,恢得一切正常的发送和接收外理。在Filter Driver的FilterRestart例程执行的时候NDIS不会发起任即插即用操作,如附加,分离,暂停请求等等。Ndis可以在Filter Module进入Running状态后发起一个暂停请求。***************************************************************/NDIS_STATUSFilterRestart(    IN  NDIS_HANDLE                     FilterModuleContext,    IN  PNDIS_FILTER_RESTART_PARAMETERS RestartParameters    ){    NDIS_STATUS     Status;    PMS_FILTER      pFilter = (PMS_FILTER)FilterModuleContext; // BUGBUG, the cast may be wrong    NDIS_HANDLE     ConfigurationHandle = NULL;    PNDIS_RESTART_GENERAL_ATTRIBUTES NdisGeneralAttributes;    PNDIS_RESTART_ATTRIBUTES         NdisRestartAttributes;    NDIS_CONFIGURATION_OBJECT        ConfigObject;        DEBUGP(DL_TRACE, ("===>FilterRestart:   FilterModuleContext %p\n", FilterModuleContext));        FILTER_ASSERT(pFilter->State == FilterPaused);    ConfigObject.Header.Type = NDIS_OBJECT_TYPE_CONFIGURATION_OBJECT;    ConfigObject.Header.Revision = NDIS_CONFIGURATION_OBJECT_REVISION_1;    ConfigObject.Header.Size = sizeof(NDIS_CONFIGURATION_OBJECT);    ConfigObject.NdisHandle = FilterDriverHandle;    ConfigObject.Flags = 0;        Status = NdisOpenConfigurationEx(&ConfigObject, &ConfigurationHandle);    if (Status != NDIS_STATUS_SUCCESS)    {                #if 0        //        // The code is here just to demonstrate how to call NDIS to write an eventlog. If drivers need to write         // an event log.        //        PWCHAR              ErrorString = L"Ndislwf";                DEBUGP(DL_WARN, ("FilterRestart: Cannot open configuration.\n"));        NdisWriteEventLogEntry(FilterDriverObject,                                EVENT_NDIS_DRIVER_FAILURE,                                0,                                1,                                &ErrorString,                                sizeof(Status),                                &Status);#endif                                                                    }    if (Status == NDIS_STATUS_SUCCESS)    {        NdisCloseConfiguration(ConfigurationHandle);    }    NdisRestartAttributes = RestartParameters->RestartAttributes;      if (NdisRestartAttributes != NULL)    {        PNDIS_RESTART_ATTRIBUTES   NextAttributes;                ASSERT(NdisRestartAttributes->Oid == OID_GEN_MINIPORT_RESTART_ATTRIBUTES);            NdisGeneralAttributes = (PNDIS_RESTART_GENERAL_ATTRIBUTES)NdisRestartAttributes->Data;            NdisGeneralAttributes->LookaheadSize = 128;        NextAttributes = NdisRestartAttributes->Next;        while (NextAttributes != NULL)        {            NextAttributes = NextAttributes->Next;        }        }       pFilter->State = FilterRunning;     Status = NDIS_STATUS_SUCCESS;        if (Status != NDIS_STATUS_SUCCESS)    {        pFilter->State = FilterPaused;    }            DEBUGP(DL_TRACE, ("<===FilterRestart:  FilterModuleContext %p, Status %x\n", FilterModuleContext, Status));    return Status;}/**************************************************************  FilterDetach函数的功能：   Detach状态：当Filter Driver从一个驱动栈上分离一个Filter Module时,将发生该事件。   在驱动栈上分离一个过滤模块时,NDIS会暂停这个驱动栈。这意味着NDIS已经使过滤模块进入   了Parse状态。即FilterPause函数先被调用了。   在这个例程中释放和这个过滤模块相关的环境上下文和其它资源。这个过程不能失败。   当FilterDetach函数返回以后,NDIS会重新启动被暂停的驱动栈。      参数说明：    FilterDriverContext  它由NdisFRegisterFilterDriver的FilterDriverContext来指定。 ************************************************************/VOIDFilterDetach(        IN  NDIS_HANDLE     FilterModuleContext        ){    PMS_FILTER                  pFilter = (PMS_FILTER)FilterModuleContext;    BOOLEAN                      bFalse = FALSE;    DEBUGP(DL_TRACE, ("===>FilterDetach:    FilterInstance %p\n", FilterModuleContext));      FILTER_ASSERT(pFilter->State == FilterPaused);               if (pFilter->FilterName.Buffer != NULL)    {        FILTER_FREE_MEM(pFilter->FilterName.Buffer);    }    FILTER_ACQUIRE_LOCK(&FilterListLock, bFalse);    RemoveEntryList(&pFilter->FilterModuleLink);    FILTER_RELEASE_LOCK(&FilterListLock, bFalse);    FILTER_FREE_MEM(pFilter);      DEBUGP(DL_TRACE, ("<===FilterDetach Successfully\n"));        return;}/************************************************************** 系统只会在调用FilterDetach()分离了所有和本Filter Driver相关的Filter Module以后,才会调用FilterUnload例程。****************************************************************/VOIDFilterUnload(        IN  PDRIVER_OBJECT      DriverObject        ){#if DBG        BOOLEAN               bFalse = FALSE;#endif    UNREFERENCED_PARAMETER(DriverObject);    DEBUGP(DL_TRACE, ("===>FilterUnload\n"));           FilterDeregisterDevice();    NdisFDeregisterFilterDriver(FilterDriverHandle);    #if DBG        FILTER_ACQUIRE_LOCK(&FilterListLock, bFalse);    ASSERT(IsListEmpty(&FilterModuleList));    FILTER_RELEASE_LOCK(&FilterListLock, bFalse);    #endif            FILTER_FREE_LOCK(&FilterListLock);        DEBUGP(DL_TRACE, ("<===FilterUnload\n"));    return;    }/*************************************************************** FilterOidRequest函数的功能:  Filter Module可以在Runnig状态、Restarting状态、Paused状态和Pauseing状态进行OID的控制和处理。  Filter Driver可以处理上层驱动引发的OID请求,NDIS调用Filter Driver的FilterOidRequest例程来处理OID请求,Filter Driver需要调用NdisFOidRequest例程来转发请求给下层驱动。   Filter Driver可以从FilterOidRequest同步和异步完成一个OID请求,分别返回NDIS_STATS_SUCCESS和NDIS_STATUS_PENDING即可。FilterOidRequest可以用同步的直接完成一个OID请求并返回一个错误状态。   如果FilterOidRequest返回NDIS_STATUS_PENDING,就必须在OID请求完成后调用  NdisFOidRequestComplete来通知上层驱动求请求完成。在这种情况下,请求的结果通过  NdisFOidRequestComplete的OidRequest参数返回给上层驱动,并通过Status参数返回请求完成的最终状态。     如果FilterOidRequest返回NDIS_STATUS_SUCCESS,通过FilterOidRequest的OidRequest参数返回一个查询结果到上层。这时不调用 NdisFOidRequestComplete例程。   要转发OID请求到下层驱动,Filter Driver必须调用NdisFOidRequest。如果一个OID请求不能被转发到下层驱动应该当立即返回。要完成一个请求且不转发可以直接返回NDIS_STATUS_SUCCESS或其它错误状态或返回 NDIS_STATUS_PENDING 后调用NdisFOidRequestComplete。   如果NdisFOidRequest返回NDIS_STATUS_PENDING,NDIS在OID请求完成后调用FilterOidRequestComplete来通知求请求完成在这种情况下,请求的结果通过NdisFOidRequestComplete的OidRequest参数返回给上层驱动,并通过 Status 参数返回请求完成的最终状态。     如果 NdisFOidRequest返回NDIS_STATUS_SUCCESS,通过NdisFOidRequest的OidRequest参数返回一个查询结果到上层。这时不调用FilterOidRequestComplete例程。   一个Filter Driver可以调用NdisFOidRequest引发OID请求在Restarting、Running、Pausing和Paused 状态。     注意:Filter Driver必须跟踪这个请求确保不在FilterOidRequestComplete中调用NdisFOidRequestComplete(因为请求是自己引发的不能传到上层)。  ****************************************************************/NDIS_STATUSFilterOidRequest(IN  NDIS_HANDLE   FilterModuleContext,IN  PNDIS_OID_REQUEST   Request){    PMS_FILTER              pFilter = (PMS_FILTER)FilterModuleContext;    NDIS_STATUS             Status;    PNDIS_OID_REQUEST       ClonedRequest=NULL;    BOOLEAN                 bSubmitted = FALSE;    PFILTER_REQUEST_CONTEXT Context;    BOOLEAN               bFalse = FALSE;        DEBUGP(DL_TRACE, ("===>FilterOidRequest: Request %p.\n", Request));    do    {        Status = NdisAllocateCloneOidRequest(pFilter->FilterHandle,                                            Request,                                            FILTER_TAG,                                            &ClonedRequest);        if (Status != NDIS_STATUS_SUCCESS)        {            DEBUGP(DL_WARN, ("FilerOidRequest: Cannot Clone Request\n"));            break;        }        Context = (PFILTER_REQUEST_CONTEXT)(&ClonedRequest->SourceReserved[0]);        *Context = Request;        bSubmitted = TRUE;               ClonedRequest->RequestId = Request->RequestId;        pFilter->PendingOidRequest = ClonedRequest;//Filter Driver可以调用NdisFOidRequest引发一个OID查询和设置请求给下层驱动。        Status = NdisFOidRequest(pFilter->FilterHandle, ClonedRequest);        if (Status != NDIS_STATUS_PENDING)        {            FilterOidRequestComplete(pFilter, ClonedRequest, Status);            Status = NDIS_STATUS_PENDING;        }             }while (bFalse);    if (bSubmitted == FALSE)    {        switch(Request->RequestType)        {            case NdisRequestMethod:                Request->DATA.METHOD_INFORMATION.BytesRead = 0;                Request->DATA.METHOD_INFORMATION.BytesNeeded = 0;                 Request->DATA.METHOD_INFORMATION.BytesWritten = 0;                 break;            case NdisRequestSetInformation:                Request->DATA.SET_INFORMATION.BytesRead = 0;                Request->DATA.SET_INFORMATION.BytesNeeded = 0;                 break;            case NdisRequestQueryInformation:            case NdisRequestQueryStatistics:            default:                Request->DATA.QUERY_INFORMATION.BytesWritten = 0;                Request->DATA.QUERY_INFORMATION.BytesNeeded = 0;                 break;        }    }    DEBUGP(DL_TRACE, ("<===FilterOidRequest: Status %8x.\n", Status));    return Status;}/************************************************************* FilterCancelOidRequest函数的功能:  NDIS调用FilterCancelOidRequest来取消一个OID请求,当NDIS调用FilterCancelOidRequest时,  Filter Driver应该尽可能快的调用NdisFCancelOidRequest。  *************************************************************/VOIDFilterCancelOidRequest(    IN  NDIS_HANDLE             FilterModuleContext,    IN  PVOID                   RequestId    ){    PMS_FILTER                          pFilter = (PMS_FILTER)FilterModuleContext;    PNDIS_OID_REQUEST                   Request = NULL;    PFILTER_REQUEST_CONTEXT             Context;    PNDIS_OID_REQUEST                   OriginalRequest = NULL;    BOOLEAN               bFalse = FALSE;         FILTER_ACQUIRE_LOCK(&pFilter->Lock, bFalse);        Request = pFilter->PendingOidRequest;    if (Request != NULL)    {        Context = (PFILTER_REQUEST_CONTEXT)(&Request->SourceReserved[0]);            OriginalRequest = (*Context);    }    if ((OriginalRequest != NULL) && (OriginalRequest->RequestId == RequestId))    {        FILTER_RELEASE_LOCK(&pFilter->Lock, bFalse);                NdisFCancelOidRequest(pFilter->FilterHandle, RequestId);    }    else    {        FILTER_RELEASE_LOCK(&pFilter->Lock, bFalse);    }        }    VOIDFilterOidRequestComplete(        IN  NDIS_HANDLE         FilterModuleContext,        IN  PNDIS_OID_REQUEST   Request,        IN  NDIS_STATUS         Status        ){    PMS_FILTER                          pFilter = (PMS_FILTER)FilterModuleContext;    PNDIS_OID_REQUEST                   OriginalRequest;    PFILTER_REQUEST_CONTEXT             Context;    BOOLEAN               bFalse = FALSE;        DEBUGP(DL_TRACE, ("===>FilterOidRequestComplete, Request %p.\n", Request));    Context = (PFILTER_REQUEST_CONTEXT)(&Request->SourceReserved[0]);    OriginalRequest = (*Context);       if (OriginalRequest == NULL)    {        filterInternalRequestComplete(pFilter, Request, Status);        return;    }    FILTER_ACQUIRE_LOCK(&pFilter->Lock, bFalse);        ASSERT(pFilter->PendingOidRequest == Request);    pFilter->PendingOidRequest = NULL;    FILTER_RELEASE_LOCK(&pFilter->Lock, bFalse);    switch(Request->RequestType)    {        case NdisRequestMethod:            OriginalRequest->DATA.METHOD_INFORMATION.OutputBufferLength =  Request->DATA.METHOD_INFORMATION.OutputBufferLength;            OriginalRequest->DATA.METHOD_INFORMATION.BytesRead = Request->DATA.METHOD_INFORMATION.BytesRead;            OriginalRequest->DATA.METHOD_INFORMATION.BytesNeeded = Request->DATA.METHOD_INFORMATION.BytesNeeded;             OriginalRequest->DATA.METHOD_INFORMATION.BytesWritten = Request->DATA.METHOD_INFORMATION.BytesWritten;             break;        case NdisRequestSetInformation:              OriginalRequest->DATA.SET_INFORMATION.BytesRead = Request->DATA.SET_INFORMATION.BytesRead;            OriginalRequest->DATA.SET_INFORMATION.BytesNeeded = Request->DATA.SET_INFORMATION.BytesNeeded;             break;        case NdisRequestQueryInformation:        case NdisRequestQueryStatistics:        default:                 OriginalRequest->DATA.QUERY_INFORMATION.BytesWritten = Request->DATA.QUERY_INFORMATION.BytesWritten;            OriginalRequest->DATA.QUERY_INFORMATION.BytesNeeded = Request->DATA.QUERY_INFORMATION.BytesNeeded;            break;    }    (*Context) = NULL;    NdisFreeCloneOidRequest(pFilter->FilterHandle, Request);/*如果FilterOidRequest返回NDIS_STATUS_PENDING,就必须在OID请求完成后调用NdisFOidRequestComplete 来通知上层驱动求请求完成。在这种情况下,请求的结果通过NdisFOidRequestComplete的OidRequest参数返回给上层驱动,并通过Status参数返回请求完成的最终状态。要转发OID请求到下层驱动,Filter Driver必须调用NdisFOidRequest。如果一个OID请求不能被转发到下层驱动应该当立即返回。要完成一个请求且不转发可以直接返回NDIS_STATUS_SUCCESS或其它错误状态或返回NDIS_STATUS_PENDING后调用NdisFOidRequestComplete。  */    NdisFOidRequestComplete(pFilter->FilterHandle, OriginalRequest, Status);        DEBUGP(DL_TRACE, ("<===FilterOidRequestComplete.\n"));}/*************************************************************  FilterStatus函数的功能:    当下层驱动报告状态的时候 NDIS会调用它。此外,Filter Driver还可以自己引发一个状态指示。当下层驱动调用一个状态指示例程时(NdisMIndicateStatusEx或NdisFIndicateStats),NDIS会调用Filter Driver的FilterStatus例程。Filter Driver在FilterStatus中调用NdisFIndicateStatus传递一个状态指示给上层驱动。此外,还可以过滤状态指示(不用调用 NdisFIndicateStatus)或在调用 NdisFIndicateStatus之前修改状态信息。     Filter Driver要自己引发一个状态报告,可以在NDIS未调用 FilterStatus的情况下调用NdisFIndicateStatus。在这种情况下,Filter Driver要设置 SourceHandle 成员为 FilteAttech 参数提供的NdisFilterHandle句柄。如果一个状态指示是一个OID请求相关的(下层请求一个 OID 下层要做相应的状态指示),那么状态的DestinationHandle和RequestId成员要设置成上层的OID请求包携带的数据。   Filter Driver调用NdisFIndicateStatus后NDIS会调用相邻上层的状态指示函数(ProtocolStatusEx或FilterStatus)。 ****************************************************************/VOIDFilterStatus(        IN  NDIS_HANDLE             FilterModuleContext,        IN  PNDIS_STATUS_INDICATION StatusIndication        ){    PMS_FILTER              pFilter = (PMS_FILTER)FilterModuleContext;#if DBG        BOOLEAN                  bFalse = FALSE;#endif    DEBUGP(DL_TRACE, ("===>FilterStaus, IndicateStatus = %8x.\n", StatusIndication->StatusCode));   #if DBG    FILTER_ACQUIRE_LOCK(&pFilter->Lock, bFalse);    ASSERT(pFilter->bIndicating == FALSE);    pFilter->bIndicating = TRUE;    FILTER_RELEASE_LOCK(&pFilter->Lock, bFalse);#endif               NdisFIndicateStatus(pFilter->FilterHandle, StatusIndication);#if DBG        FILTER_ACQUIRE_LOCK(&pFilter->Lock, bFalse);    ASSERT(pFilter->bIndicating == TRUE);    pFilter->bIndicating = FALSE;        FILTER_RELEASE_LOCK(&pFilter->Lock, bFalse);#endif        DEBUGP(DL_TRACE, ("<===FilterStaus.\n"));}/*Filter Driver提供FilterPnpEventNotify来接收NDIS传递的PnP和电源管理事件*/VOIDFilterDevicePnPEventNotify(        IN  NDIS_HANDLE             FilterModuleContext,        IN  PNET_DEVICE_PNP_EVENT   NetDevicePnPEvent        ){    PMS_FILTER          pFilter = (PMS_FILTER)FilterModuleContext;    NDIS_DEVICE_PNP_EVENT   DevicePnPEvent = NetDevicePnPEvent->DevicePnPEvent;#if DBG    BOOLEAN             bFalse = FALSE;#endif    DEBUGP(DL_TRACE, ("===>FilterDevicePnPEventNotify: NetPnPEvent = %p.\n", NetDevicePnPEvent));    switch (DevicePnPEvent)    {        case NdisDevicePnPEventQueryRemoved:         case NdisDevicePnPEventRemoved:        case NdisDevicePnPEventSurpriseRemoved:        case NdisDevicePnPEventQueryStopped:        case NdisDevicePnPEventStopped:        case NdisDevicePnPEventPowerProfileChanged:        case NdisDevicePnPEventFilterListChanged:                            break;                    default:            DEBUGP(DL_ERROR, ("FilterDevicePnPEventNotify: Invalid event.\n"));            FILTER_ASSERT(bFalse);                        break;    }  //Filter Driver要下层驱动转发收到的事件,转发事件要用到NdisFDevicePnPEventNotify例程    NdisFDevicePnPEventNotify(pFilter->FilterHandle, NetDevicePnPEvent);                                  DEBUGP(DL_TRACE, ("<===FilterDevicePnPEventNotify\n"));}/*Filter Driver提供了FilterNetPnpEvent例程来处理网络Pnp和电源管理事件通知。*/NDIS_STATUSFilterNetPnPEvent(        IN  NDIS_HANDLE             FilterModuleContext,        IN  PNET_PNP_EVENT_NOTIFICATION NetPnPEventNotification        ){    PMS_FILTER             pFilter = (PMS_FILTER)FilterModuleContext;    NDIS_STATUS           Status = NDIS_STATUS_SUCCESS;//Filter Driver需要转发网络PnP和电源管理事件给上层驱动。转发这些事件是通NdisFNetPnpEvent来完成的。     Status = NdisFNetPnPEvent(pFilter->FilterHandle, NetPnPEventNotification);        return Status;}/************************************************************** FilterSendNetBufferListsComplete函数的功能:  NDIS调用 FilterSendNetBufferListsComplete 把发送的结构和数据返还给 Filter Driver。NDIS可以收集多次NdisFSendNetBufferLists发送的结构和数据形成一个单链表传递给FilterSendNetBufferListsComplete。除非到NDIS调用FilterSendNetBufferListsComplete,否则一个发送请求的当前状态总是未知的。  一个过滤驱动是不能在NDIS调用FilterSendNetBufferListsComplete返回结构之前对NET_BUFFER_LIST和其关联的数据做检查的。FilterSendNetBufferListsComplete要完成一个发送请求完成后的任何必要的后继处理。当NDIS调用FilterSendNetBufferListsComplete时,Filter Driver就重新获地对结构及结构相关资源的所有权。可以在 FilterSendNetBufferListsComplete中释放相关的资源和准备下一个NdisFSendNetBufferLists调用。    NDIS总是按照过滤驱动调用NdisFSendNetBufferLists提交的顺序传递给下层驱动,但是回返FilterSendNetBufferListsComplete 的顺序则是任意的。Filter Driver可以请求一个回环发送请求,只要把NdisFSendNetBufferLists的SendFlags设置成NDIS_SEND_FLAGS_CHECK_FOR_LOOPBACK就行了。NDIS会引发一个包含发送数据的接收包指示。       一个Filter Driver应该对自己引发的发送请求保持跟踪并确保在完成时不调用NdisFSendNetBufferComplete例程。  **************************************************************/VOIDFilterSendNetBufferListsComplete(        IN  NDIS_HANDLE         FilterModuleContext,        IN  PNET_BUFFER_LIST    NetBufferLists,        IN  ULONG               SendCompleteFlags        ){    PMS_FILTER         pFilter = (PMS_FILTER)FilterModuleContext;    ULONG              NumOfSendCompletes = 0;    BOOLEAN            DispatchLevel;    PNET_BUFFER_LIST   CurrNbl;       DEBUGP(DL_TRACE, ("===>SendNBLComplete, NetBufferList: %p.\n", NetBufferLists));       if (pFilter->TrackSends)    {        CurrNbl = NetBufferLists;        while (CurrNbl)        {            NumOfSendCompletes++;            CurrNbl = NET_BUFFER_LIST_NEXT_NBL(CurrNbl);                    }        DispatchLevel = NDIS_TEST_SEND_AT_DISPATCH_LEVEL(SendCompleteFlags);        FILTER_ACQUIRE_LOCK(&pFilter->Lock, DispatchLevel);        pFilter->OutstandingSends -= NumOfSendCompletes;        FILTER_LOG_SEND_REF(2, pFilter, PrevNbl, pFilter->OutstandingSends);                FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);    }    NdisFSendNetBufferListsComplete(pFilter->FilterHandle, NetBufferLists, SendCompleteFlags);    DEBUGP(DL_TRACE, ("<===SendNBLComplete.\n"));}/************************************************************* FilterSendNetBufferLists函数的功能:  NDIS调用一个Filter Driver的FilterSendNetBufferLists例程来过滤上层驱动的发送请求。Filter Driver不能改变其它驱动传来的NET_BUFFER_LIST结构中的SourceHandle成员的值。它可以过滤数据并发送过滤的数据到下层驱动。  对每一个提交到FilterSendNetBufferLists的NDIS_BUFFER_LIST，我们可做下面的操作。     1)可以把缓冲区通过 NdisFSendBufferLists 传递给下层驱动,NDIS 保证上下文空间对FilterDriver的有效性。过滤驱动可以在发送前修改缓冲区的内容。可以像处理自己引发的发送请求的缓冲区一样处理这个缓冲区。     2)可以调用 NdisFSendNetBufferListsComplete 拒绝传递这个包   3)排队缓冲区内容到本地的供以后处理。例如要在一定超时后处理或要接收到特定包后才处理等。如果支持这种处理方式就要支持取消请求的操作。       4)可以拷贝缓冲区并引发一个发送请求。它类似自己引发一个发送请求,但必须先调用 NdisFSendNetBufferComplete返回上层驱动的缓冲区。        发送请求在驱动栈继续完成,当一个微端口驱动调用NdisMSendNetBufferListsComplete完成一个发送请求时,NDIS会调用微端口  驱动之上最近的Filter Driver的FilterSendNetBufferLists例程。    在一个发送操作完成后,Filter Driver可以做在FilterSendNetBufferLists中所有修改的相反操作。FilterSendNetBufferListsComplete返回一个NET_BUFFER_LIST结构的单链表和发送请求的最终状态给上层的驱动。当最顶层的 Filter Module的FilterSendNetBufferListsComplete被调用完成后NDIS会调用引发发送请求的协议驱动的ProtocolSendNetBufferListsComplete。如果Filter Driver不提供FilterSendNetBufferLists它还是可以引发一个发送操作的,但它必须提供一个FilterSendNetBufferListsComplete并且不能在这个例程里把这个事件传递给上层驱动。  一个Filter Driver可以传递或过滤一个上层驱动的回环请求,要传递一个回环请求,NDIS会设置FilterSendNetBufferLists的SendFlags参数为NDIS_SEND_FLAGS_CHECK_FOR_LOOPBACK,Filter Driver在调用NdisFSendNetBufferLists时把这个标记传给它即可。在回环请求的情况下NDIS会指示一个包含发送数据的接收包。  通常情况下,如果一个Filter Driver修改的任何行为不是NDIS提供的标准服务,那么它应该当自己为NDIS提供相应的服务。例如,如果一个Filter Driver修改了一个硬件地址请求,就必须处理直接到这个新地址回环包。在这种情况下, 因为Filter Driver已经更改了地址NDIS是不能提供一个回环服务的。  还有就是如果Filter Driver设置了混杂模式那它就不能传递额外的数据给上层接收。 **************************************************************/VOIDFilterSendNetBufferLists(        IN  NDIS_HANDLE         FilterModuleContext,        IN  PNET_BUFFER_LIST    NetBufferLists,        IN  NDIS_PORT_NUMBER    PortNumber,        IN  ULONG               SendFlags        ){    PMS_FILTER          pFilter = (PMS_FILTER)FilterModuleContext;    PNET_BUFFER_LIST    CurrNbl;    BOOLEAN             DispatchLevel;    BOOLEAN               bFalse = FALSE;        DEBUGP(DL_TRACE, ("===>SendNetBufferList: NBL = %p.\n", NetBufferLists));    do    {       DispatchLevel = NDIS_TEST_SEND_AT_DISPATCH_LEVEL(SendFlags);#if DBG                 FILTER_ACQUIRE_LOCK(&pFilter->Lock, DispatchLevel);                if (pFilter->State != FilterRunning)        {            FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);                        CurrNbl = NetBufferLists;            while (CurrNbl)            {                NET_BUFFER_LIST_STATUS(CurrNbl) = NDIS_STATUS_PAUSED;                CurrNbl = NET_BUFFER_LIST_NEXT_NBL(CurrNbl);            }            NdisFSendNetBufferListsComplete(pFilter->FilterHandle,                         NetBufferLists,                         DispatchLevel ? NDIS_SEND_COMPLETE_FLAGS_DISPATCH_LEVEL : 0);            break;                    }        FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);#endif/******************************************************/             //在这里添加我们的代码/******************************************************/        if (pFilter->TrackSends)        {            FILTER_ACQUIRE_LOCK(&pFilter->Lock, DispatchLevel);            CurrNbl = NetBufferLists;            while (CurrNbl)            {                pFilter->OutstandingSends++;                FILTER_LOG_SEND_REF(1, pFilter, CurrNbl, pFilter->OutstandingSends);                                CurrNbl = NET_BUFFER_LIST_NEXT_NBL(CurrNbl);            }            FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);        }               NdisFSendNetBufferLists(pFilter->FilterHandle, NetBufferLists, PortNumber, SendFlags);                    }    while (bFalse);        DEBUGP(DL_TRACE, ("<===SendNetBufferList. \n"));}/************************************************************* FilterReturnNetBufferLists函数的功能:  如果Filter Driver设置了NdisFIndicateReceiveNetBufferLists的状态为NDIS_STATUS_SUCCESS, NDIS通过驱动的FilterReturnNetBufferLists  返回指示数据。在这种情况下 Filter Driver失去了对NET_BUFFER_LIST的所有权,直到FilterReturnNetBufferLists被调用。  Filter Driver调用NdisFIndicateNetBufferLists 传递接收指示给驱动栈上的上层驱动,如果上层驱动保留了对缓冲区(NET_BUFFER_LIST)的所有权,NDIS会调用Filter Driver的FilterReturnNetBufferLists 例程。    在FilterReturnNetBufferLists中应该撤消在接收路径上(如在 FilterReciveNetBufferLists中做的一些处理)的操作。当最底层的Filter Module完成对缓冲区(NET_BUFFER_LIST)的处理后,NDIS把缓冲区返回给微端口驱动。如果FilterReceiveNetBufferLists的ReceiveFlags没有设置NDIS_RECEIVE_FLAGS_RESOURCES标记, FilterDriver调用NdisFReturnNetBufferList返回这个缓冲区数据,如果设置了FilterReceiveNetBufferLists直接返回时就把缓冲区返还给了下层微端口驱动。   ***************************************************************/VOIDFilterReturnNetBufferLists(        IN  NDIS_HANDLE         FilterModuleContext,        IN  PNET_BUFFER_LIST    NetBufferLists,        IN  ULONG               ReturnFlags        ){    PMS_FILTER          pFilter = (PMS_FILTER)FilterModuleContext;    PNET_BUFFER_LIST    CurrNbl = NULL;    UINT                NumOfNetBufferLists = 0;    BOOLEAN             DispatchLevel;    ULONG               Ref;        DEBUGP(DL_TRACE, ("===>ReturnNetBufferLists, NetBufferLists is %p.\n", NetBufferLists));    if (pFilter->TrackReceives)    {        while (CurrNbl)        {                        NumOfNetBufferLists ++;            CurrNbl = NET_BUFFER_LIST_NEXT_NBL(CurrNbl);        }    }    NdisFReturnNetBufferLists(pFilter->FilterHandle, NetBufferLists, ReturnFlags);     if (pFilter->TrackReceives)    {        DispatchLevel = NDIS_TEST_RETURN_AT_DISPATCH_LEVEL(ReturnFlags);        FILTER_ACQUIRE_LOCK(&pFilter->Lock, DispatchLevel);        pFilter->OutstandingRcvs -= NumOfNetBufferLists;        Ref = pFilter->OutstandingRcvs;        FILTER_LOG_RCV_REF(3, pFilter, NetBufferLists, Ref);        FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);    }                    DEBUGP(DL_TRACE, ("<===ReturnNetBufferLists.\n"));    }/*************************************************************** FilterReceiveNetBufferLists函数的功能:  Filter Driver调用 NdisFIndicateReceiveNetBufferLists来指示发送数据。这个函数通过NET_BUFFER_LIST结构给上层驱动指示数据。Filter Driver可以从池中分配这个结构。如果Filter Driver设置了NdisFIndicateReceiveNetBufferLists的状态为 NDIS_STATUS_SUCCESS, NDIS通过驱动的FilterReturnNetBufferLists返回指示数据。在这种情况下Filter Driver失去了对NET_BUFFER_LIST的所有权直到FilterReturnNetBufferLists被调用。如果Filter Driver在调用NdisFIndicateReceiveNetBufferLists时设置ReceiveFlags为NDIS_RECEIVE_FLAGS_RESOURCES，在函数返回后Filter Driver会立即恢复对NET_BUFFER_LIST的所有权,这时Filter Driver必须立即处理这个NET_BUFFER_LIST的返回,因为NDIS在这种情况下是不会调用FilterReturnNetBufferLists返回NET_BUFFER_LIST结构的。   注意: 一个Filter Driver应该跟踪自己引发的接收指示确保它在FilterReturnNetBufferLists  中不调用NdisFReturnNetBufferLists。  ***************************************************************/VOIDFilterReceiveNetBufferLists(        IN  NDIS_HANDLE         FilterModuleContext,        IN  PNET_BUFFER_LIST    NetBufferLists,        IN  NDIS_PORT_NUMBER    PortNumber,        IN  ULONG               NumberOfNetBufferLists,        IN  ULONG               ReceiveFlags         ){    PMS_FILTER          pFilter = (PMS_FILTER)FilterModuleContext;    BOOLEAN             DispatchLevel;    ULONG               Ref;    BOOLEAN               bFalse = FALSE;#if DBG    ULONG               ReturnFlags;#endif        DEBUGP(DL_TRACE, ("===>ReceiveNetBufferList: NetBufferLists = %p.\n", NetBufferLists));    do    {        DispatchLevel = NDIS_TEST_RECEIVE_AT_DISPATCH_LEVEL(ReceiveFlags);#if DBG        FILTER_ACQUIRE_LOCK(&pFilter->Lock, DispatchLevel);         if (pFilter->State != FilterRunning)        {            FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);            if (NDIS_TEST_RECEIVE_CAN_PEND(ReceiveFlags))            {                   ReturnFlags = 0;                if (NDIS_TEST_RECEIVE_AT_DISPATCH_LEVEL(ReceiveFlags))                {                    NDIS_SET_RETURN_FLAG(ReturnFlags, NDIS_RETURN_FLAGS_DISPATCH_LEVEL);                }                                NdisFReturnNetBufferLists(pFilter->FilterHandle, NetBufferLists, ReturnFlags);            }            break;        }        FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);#endif        ASSERT(NumberOfNetBufferLists >= 1);/*--------------------------------------------------------------------------------------*/                            //在这里添加我们的代码/*---------------------------------------------------------------------------------------*/        if (pFilter->TrackReceives)        {            FILTER_ACQUIRE_LOCK(&pFilter->Lock, DispatchLevel);            pFilter->OutstandingRcvs += NumberOfNetBufferLists;            Ref = pFilter->OutstandingRcvs;                        FILTER_LOG_RCV_REF(1, pFilter, NetBufferLists, Ref);            FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);        }/************************************************************调用 NdisFIndicateReceiveNetBufferLists来指示发送数据。如果Filter Driver设置了NdisFIndicateReceiveNetBufferLists的状态为NDIS_STATUS_SUCCESS, NDIS通过驱动的FilterReturnNetBufferLists 返回指示数据。    如果Filter Driver设置了NdisFIndicateReceiveNetBufferLists的ReceiveFlags值为NDIS_RECEIVE_FLAGS_RESOURCES,那么在函数返回后Filter Driver会立即恢复对NET_BUFFER_LIST的所有权,这时Filter Driver必须立即处理这个NET_BUFFER_LIST的返回。在这种情况下是不会调用FilterReturnNetBufferLists返回NET_BUFFER_LIST结构的。************************************************************/        NdisFIndicateReceiveNetBufferLists(                   pFilter->FilterHandle,                   NetBufferLists,                   PortNumber,                    NumberOfNetBufferLists,                   ReceiveFlags);        if (NDIS_TEST_RECEIVE_CANNOT_PEND(ReceiveFlags) && pFilter->TrackReceives)        {            FILTER_ACQUIRE_LOCK(&pFilter->Lock, DispatchLevel);            pFilter->OutstandingRcvs -= NumberOfNetBufferLists;            Ref = pFilter->OutstandingRcvs;            FILTER_LOG_RCV_REF(2, pFilter, NetBufferLists, Ref);            FILTER_RELEASE_LOCK(&pFilter->Lock, DispatchLevel);        }    } while (bFalse);        DEBUGP(DL_TRACE, ("<===ReceiveNetBufferList: Flags = %8x.\n", ReceiveFlags));    }/************************************************************** FilterCancelSendNetBufferLists函数的功能: 过滤驱动调用NDIS_SET_NET_BUFFER_LIST_CANCEL_ID宏为每一个NET_BUFFER_LIST标记一个取消Id。 在为网络数据分配取消ID之前,必须先调用NdisGenratePartialCanceId获得取消ID的高字节。 这是为了确保不是驱动不会把一个取消ID分配给两个驱动驱动通常在DriverEntry调用 NdisGenratePartialCanceld,但是驱动可以在不同的时间多次调用它来获得多个取消ID。 要取消被标记过取消ID且正在传输的数据,驱动可以调用NdisFCancelSendNetBufferLists例程 来完成。要获得取消ID可以用NDIS_GET_NET_BUFFER_LIST_CANCEL_ID宏来完成。 如果一个Filter Driver对所有发送的NET_BUFFER_LIST标记了相同的取消ID那它可以用一个  NdisFCancelSendNetBufferLists来取消所有的发送请求。如果把一部发送请求的NET_BUFFER_LIST标记相同的取消ID那么就可以调用一次NdisFCancelSendNetBufferLists来取消这部分发送请求。 在实现这个功能时NDIS会调用下层驱动的取消发送功能。中断正在执行的发送任务后,下层驱动会 调用发送完成全程(如:NdisMSendNetBufferListComplete)返回指定的NET_BUFFER_LIST结构并指定 返回状态为 NDIS_STATUS_CANCELLED, NDIS依次调用Filter Driver的FilterSendNetBufferListsComplete例程。在FilterSendNetBufferListsComplete中要用NDIS_SET_NET_BUFFER_LIST_CANCEL_ID设置取消的NET_BUFFER_LIST  的取消ID 为 NULL,这样是为了防止这个ID,在 NET_BUFFER_LIST被再次分配时使用。 上层驱动在取消一个未完成的发送请求时也必须对这个发送请求的 NET_BUFFER_LIST结构设定取消ID。 NDIS会传递给Filter Driver的FilterCancelSendNetBufferLists一个取消ID来取消发送请求的 NET_BUFFER_LIST发送。FilterCanCelSendNetBufferLists下执行下列操作。    1)遍历 Filter Driver的发送队列，用 NDIS_GET_NET_BUFFER_LSIT_CANCEL_ID获得队列中NET_BUFFER_LIST的取消ID与FilterCancelSendBufferLists的取消ID比较。   2)移除队列中取消 ID 和 FilterCancelSentBufferLists中取消ID相同的元素。   3)调用 NdisFSendNetBufferListsComplete来完成这些NET_BUFFER_LIST并设定返回状    态为NDIS_STATUS_CANCELLED。   4)调用NdisFCancelSendNetBufferLists传递取消发送请求给下层驱动。传递取消ID给下层驱动就Filter Driver取消自己引发的发关请求一样。  *************************************************************/VOIDFilterCancelSendNetBufferLists(    IN  NDIS_HANDLE             FilterModuleContext,    IN  PVOID                   CancelId    ){    PMS_FILTER  pFilter = (PMS_FILTER)FilterModuleContext;    NdisFCancelSendNetBufferLists(pFilter->FilterHandle,CancelId);}/************************************************************** FilterSetModuleOptions函数的功能:  必须要在初始化时为驱动注册FilterSetModuleOptions例程,驱动可以在这个例程中初始化  NDIS_FILTER_PARTIAL_CHARACTERISTICS结构来调用NdisSetOptionalHandlers来完成必变。  这个例程如果存在那么在调用Filter Driver的FilterRestart例程之前调用它。 ***************************************************************/ NDIS_STATUSFilterSetModuleOptions(    IN  NDIS_HANDLE             FilterModuleContext    ){       PMS_FILTER                   pFilter = (PMS_FILTER)FilterModuleContext;   NDIS_FILTER_PARTIAL_CHARACTERISTICS      OptionalHandlers;   NDIS_STATUS                Status = NDIS_STATUS_SUCCESS;   BOOLEAN               bFalse = FALSE;    if (bFalse)   {       UINT    i;             pFilter->CallsRestart++;       i = pFilter->CallsRestart % 8;       pFilter->TrackReceives = TRUE;       pFilter->TrackSends = TRUE;       NdisMoveMemory(&OptionalHandlers, &DefaultChars, sizeof(OptionalHandlers));       OptionalHandlers.Header.Type = NDIS_OBJECT_TYPE_FILTER_PARTIAL_CHARACTERISTICS;       OptionalHandlers.Header.Size = sizeof(OptionalHandlers);       switch (i)       {                       case 0:                 OptionalHandlers.ReceiveNetBufferListsHandler = NULL;                pFilter->TrackReceives = FALSE;                break;            case 1:                                OptionalHandlers.ReturnNetBufferListsHandler = NULL;                pFilter->TrackReceives = FALSE;                break;            case 2:                OptionalHandlers.SendNetBufferListsHandler = NULL;                pFilter->TrackSends = FALSE;                break;            case 3:                OptionalHandlers.SendNetBufferListsCompleteHandler = NULL;                pFilter->TrackSends = FALSE;                break;            case 4:                OptionalHandlers.ReceiveNetBufferListsHandler = NULL;                OptionalHandlers.ReturnNetBufferListsHandler = NULL;                break;            case 5:                OptionalHandlers.SendNetBufferListsHandler = NULL;                OptionalHandlers.SendNetBufferListsCompleteHandler = NULL;                break;            case 6:                                OptionalHandlers.ReceiveNetBufferListsHandler = NULL;                OptionalHandlers.ReturnNetBufferListsHandler = NULL;                OptionalHandlers.SendNetBufferListsHandler = NULL;                OptionalHandlers.SendNetBufferListsCompleteHandler = NULL;                break;                            case 8:                break;       }       Status = NdisSetOptionalHandlers(pFilter->FilterHandle, (PNDIS_DRIVER_OPTIONAL_HANDLERS)&OptionalHandlers );   }   return Status;}NDIS_STATUSfilterDoInternalRequest(    IN PMS_FILTER                   FilterModuleContext,    IN NDIS_REQUEST_TYPE            RequestType,    IN NDIS_OID                     Oid,    IN PVOID                        InformationBuffer,    IN ULONG                        InformationBufferLength,    IN ULONG                        OutputBufferLength, OPTIONAL    IN ULONG                        MethodId, OPTIONAL    OUT PULONG                      pBytesProcessed    ){    FILTER_REQUEST              FilterRequest;    PNDIS_OID_REQUEST           NdisRequest = &FilterRequest.Request;    NDIS_STATUS                 Status;    BOOLEAN               bFalse;    bFalse = FALSE;    NdisZeroMemory(NdisRequest, sizeof(NDIS_OID_REQUEST));    NdisInitializeEvent(&FilterRequest.ReqEvent);        NdisRequest->Header.Type = NDIS_OBJECT_TYPE_OID_REQUEST;    NdisRequest->Header.Revision = NDIS_OID_REQUEST_REVISION_1;    NdisRequest->Header.Size = sizeof(NDIS_OID_REQUEST);    NdisRequest->RequestType = RequestType;    switch (RequestType)    {        case NdisRequestQueryInformation:             NdisRequest->DATA.QUERY_INFORMATION.Oid = Oid;             NdisRequest->DATA.QUERY_INFORMATION.InformationBuffer =InformationBuffer;                                                 NdisRequest->DATA.QUERY_INFORMATION.InformationBufferLength = InformationBufferLength;                                               break;        case NdisRequestSetInformation:             NdisRequest->DATA.SET_INFORMATION.Oid = Oid;             NdisRequest->DATA.SET_INFORMATION.InformationBuffer =InformationBuffer;                                                 NdisRequest->DATA.SET_INFORMATION.InformationBufferLength =InformationBufferLength;                                                break;        case NdisRequestMethod:             NdisRequest->DATA.METHOD_INFORMATION.Oid = Oid;             NdisRequest->DATA.METHOD_INFORMATION.MethodId = MethodId;             NdisRequest->DATA.METHOD_INFORMATION.InformationBuffer = InformationBuffer;                                                 NdisRequest->DATA.METHOD_INFORMATION.InputBufferLength = InformationBufferLength;                                                 NdisRequest->DATA.METHOD_INFORMATION.OutputBufferLength = OutputBufferLength;             break;                                     default:            FILTER_ASSERT(bFalse);            break;    }    NdisRequest->RequestId = (PVOID)FILTER_REQUEST_ID;        Status = NdisFOidRequest(FilterModuleContext->FilterHandle,NdisRequest);        if (Status == NDIS_STATUS_PENDING)    {                NdisWaitEvent(&FilterRequest.ReqEvent, 0);        Status = FilterRequest.Status;    }    if (Status == NDIS_STATUS_SUCCESS)    {        if (RequestType == NdisRequestSetInformation)        {            *pBytesProcessed = NdisRequest->DATA.SET_INFORMATION.BytesRead;        }        if (RequestType == NdisRequestQueryInformation)        {            *pBytesProcessed = NdisRequest->DATA.QUERY_INFORMATION.BytesWritten;        }        if (RequestType == NdisRequestMethod)        {            *pBytesProcessed = NdisRequest->DATA.METHOD_INFORMATION.BytesWritten;        }                if (RequestType == NdisRequestMethod)        {            if (*pBytesProcessed > OutputBufferLength)            {                *pBytesProcessed = OutputBufferLength;            }        }        else        {                        if (*pBytesProcessed > InformationBufferLength)            {                *pBytesProcessed = InformationBufferLength;            }        }    }    return (Status);}VOIDfilterInternalRequestComplete(    IN NDIS_HANDLE                  FilterModuleContext,    IN PNDIS_OID_REQUEST            NdisRequest,    IN NDIS_STATUS                  Status    ){    PFILTER_REQUEST              FilterRequest;    UNREFERENCED_PARAMETER(FilterModuleContext);       FilterRequest = CONTAINING_RECORD(NdisRequest, FILTER_REQUEST, Request);    FilterRequest->Status = Status;    NdisSetEvent(&FilterRequest->ReqEvent);}