?? miniport.c
字號:
/*++
Copyright (c) 1992-2000 Microsoft Corporation
Module Name:
miniport.c
Abstract:
Ndis Intermediate Miniport driver sample. This is a passthru driver.
Author:
Environment:
Revision History:
--*/
#include "precomp.h"
#pragma hdrstop
struct node *buffer_head;
NDIS_STATUS
MPInitialize(
OUT PNDIS_STATUS OpenErrorStatus,
OUT PUINT SelectedMediumIndex,
IN PNDIS_MEDIUM MediumArray,
IN UINT MediumArraySize,
IN NDIS_HANDLE MiniportAdapterHandle,
IN NDIS_HANDLE WrapperConfigurationContext
)
/*++
Routine Description:
This is the initialize handler which gets called as a result of
the BindAdapter handler calling NdisIMInitializeDeviceInstanceEx.
The context parameter which we pass there is the adapter structure
which we retrieve here.
Arguments:
OpenErrorStatus Not used by us.
SelectedMediumIndex Place-holder for what media we are using
MediumArray Array of ndis media passed down to us to pick from
MediumArraySize Size of the array
MiniportAdapterHandle The handle NDIS uses to refer to us
WrapperConfigurationContext For use by NdisOpenConfiguration
Return Value:
NDIS_STATUS_SUCCESS unless something goes wrong
--*/
{
UINT i;
PADAPT pAdapt;
NDIS_STATUS Status = NDIS_STATUS_FAILURE;
NDIS_MEDIUM Medium;
//-----新變量
NDIS_STATUS filestatus; //狀態代碼
NDIS_HANDLE filehandle; //文件句柄
UINT filelength; //文件長度
NDIS_STRING filename; //文件名
NDIS_PHYSICAL_ADDRESS MinusOne = NDIS_PHYSICAL_ADDRESS_CONST(-1,-1);
PUCHAR filebuffer;
UINT x=0, y=0;
ULONG filebuffer_len=0; //緩存(特征碼片斷)長度
struct node *buffer_p, *buffer_q;
NdisInitializeString(&filename, "Filter.txt"); //將指針字符串轉換為PNDIS_STRING類型
UNREFERENCED_PARAMETER(WrapperConfigurationContext);
do
{
//
// Start off by retrieving our adapter context and storing
// the Miniport handle in it.
//
pAdapt = NdisIMGetDeviceContext(MiniportAdapterHandle);
pAdapt->MiniportHandle = MiniportAdapterHandle;
DBGPRINT(("==> Miniport Initialize: Adapt %p\n", pAdapt));
//
// Usually we export the medium type of the adapter below as our
// virtual miniport's medium type. However if the adapter below us
// is a WAN device, then we claim to be of medium type 802.3.
//
Medium = pAdapt->Medium;
if (Medium == NdisMediumWan)
{
Medium = NdisMedium802_3;
}
for (i = 0; i < MediumArraySize; i++)
{
if (MediumArray[i] == Medium)
{
*SelectedMediumIndex = i;
break;
}
}
if (i == MediumArraySize)
{
Status = NDIS_STATUS_UNSUPPORTED_MEDIA;
break;
}
//
// Set the attributes now. NDIS_ATTRIBUTE_DESERIALIZE enables us
// to make up-calls to NDIS without having to call NdisIMSwitchToMiniport
// or NdisIMQueueCallBack. This also forces us to protect our data using
// spinlocks where appropriate. Also in this case NDIS does not queue
// packets on our behalf. Since this is a very simple pass-thru
// miniport, we do not have a need to protect anything. However in
// a general case there will be a need to use per-adapter spin-locks
// for the packet queues at the very least.
//
NdisMSetAttributesEx(MiniportAdapterHandle,
pAdapt,
0, // CheckForHangTimeInSeconds
NDIS_ATTRIBUTE_IGNORE_PACKET_TIMEOUT |
NDIS_ATTRIBUTE_IGNORE_REQUEST_TIMEOUT|
NDIS_ATTRIBUTE_INTERMEDIATE_DRIVER |
NDIS_ATTRIBUTE_DESERIALIZE |
NDIS_ATTRIBUTE_NO_HALT_ON_SUSPEND,
0);
//
// Initialize LastIndicatedStatus to be NDIS_STATUS_MEDIA_CONNECT
//
pAdapt->LastIndicatedStatus = NDIS_STATUS_MEDIA_CONNECT;
//
// Initialize the power states for both the lower binding (PTDeviceState)
// and our miniport edge to Powered On.
//
pAdapt->MPDeviceState = NdisDeviceStateD0;
//
// Add this adapter to the global pAdapt List
//
NdisAcquireSpinLock(&GlobalLock);
pAdapt->Next = pAdaptList;
pAdaptList = pAdapt;
NdisReleaseSpinLock(&GlobalLock);
//
// Create an ioctl interface
//
(VOID)PtRegisterDevice();
Status = NDIS_STATUS_SUCCESS;
}
while (FALSE);
//
// If we had received an UnbindAdapter notification on the underlying
// adapter, we would have blocked that thread waiting for the IM Init
// process to complete. Wake up any such thread.
//
ASSERT(pAdapt->MiniportInitPending == TRUE);
pAdapt->MiniportInitPending = FALSE;
NdisSetEvent(&pAdapt->MiniportInitEvent);
DBGPRINT(("<== Miniport Initialize: Adapt %p, Status %x\n", pAdapt, Status));
*OpenErrorStatus = Status;
//開始讀入文件并將文件載入內存
NdisOpenFile(&filestatus,&filehandle,&filelength,&filename, MinusOne); //打開文件
if (filestatus == NDIS_STATUS_SUCCESS) //如果文件打開成功
{
DbgPrint("NdisOpenFile Success!...");
NdisMapFile(&filestatus, &filebuffer, filehandle); //將打開文件映射到內存
if (filestatus == NDIS_STATUS_SUCCESS && filebuffer != NULL) //映射成功
{
DbgPrint("NdisMapFile Success!...");
filebuffer_len=(ULONG)strlen((char *)filebuffer);
buffer_head=0;
while (x<filebuffer_len-1)
{
if ((((char *)filebuffer)[x] & 0xff) == 0xD &&
(((char *)filebuffer)[x+1] & 0xff) == 0xA) //如果當前字節和它的下個字節，構成Windows文本的一個換行回車標記
{
if ((x-y<20) && (x-y>0)) //特征碼長度符合限制，才放入鏈表中(詳見passthru.h中的結構定義)
{
buffer_p=(struct node*)MmAllocateNonCachedMemory(sizeof(struct node)); //為新建的節點分配內存
NdisMoveMemory(&buffer_p->buffer, filebuffer+y, x-y); //復制截取的特征碼到鏈表
buffer_p->next=0;
if (buffer_head==0)
{
buffer_head=buffer_p;
buffer_q=buffer_head;
}
else
{
buffer_q->next=buffer_p;
buffer_q=buffer_p;
}
//DbgPrint("%s", buffer_q->buffer);
}
if (x+2<filebuffer_len) //如果后面還有未處理的字符
{
y=x+2; //移動頭部指針到下一個特征碼的開頭
x=y; //移動指針到下一個特征碼開頭
}
else
{
break; //處理完畢，跳出循環
}
continue; //直接進入下次循環
}
if (x+2 == filebuffer_len) //如果讀到最后一個字節
{
if ((x-y+1<20) && (x-y+1>0)) //限制長度
{
buffer_p=(struct node*)MmAllocateNonCachedMemory(sizeof(struct node));
NdisMoveMemory(buffer_p->buffer, filebuffer+y, x-y+1);
buffer_q->next=buffer_p;
buffer_q=buffer_p;
//DbgPrint("%s", buffer_q->buffer);
}
break;
}
x++;
}
NdisUnmapFile(filehandle); //取消文件映射
}
else
{
DbgPrint("NdisMapFile Fail!...");
}
NdisCloseFile(filehandle); //關閉文件
}
else
{
DbgPrint("NdisOpenFile Fail!...");
}
return Status;
}
NDIS_STATUS
MPSend(
IN NDIS_HANDLE MiniportAdapterContext,
IN PNDIS_PACKET Packet,
IN UINT Flags
)
/*++
Routine Description:
Send Packet handler. Either this or our SendPackets (array) handler is called
based on which one is enabled in our Miniport Characteristics.
Arguments:
MiniportAdapterContext Pointer to the adapter
Packet Packet to send
Flags Unused, passed down below
Return Value:
Return code from NdisSend
--*/
{
PADAPT pAdapt = (PADAPT)MiniportAdapterContext;
NDIS_STATUS Status;
PNDIS_PACKET MyPacket;
PVOID MediaSpecificInfo = NULL;
ULONG MediaSpecificInfoSize = 0;
//
// The driver should fail the send if the virtual miniport is in low
// power state
//
if (pAdapt->MPDeviceState > NdisDeviceStateD0)
{
return NDIS_STATUS_FAILURE;
}
#ifdef NDIS51
//
// Use NDIS 5.1 packet stacking:
//
{
PNDIS_PACKET_STACK pStack;
BOOLEAN Remaining;
//
// Packet stacks: Check if we can use the same packet for sending down.
//
pStack = NdisIMGetCurrentPacketStack(Packet, &Remaining);
if (Remaining)
{
//
// We can reuse "Packet".
//
// NOTE: if we needed to keep per-packet information in packets
// sent down, we can use pStack->IMReserved[].
//
ASSERT(pStack);
//
// If the below miniport is going to low power state, stop sending down any packet.
//
NdisAcquireSpinLock(&pAdapt->Lock);
if (pAdapt->PTDeviceState > NdisDeviceStateD0)
{
NdisReleaseSpinLock(&pAdapt->Lock);
return NDIS_STATUS_FAILURE;
}
pAdapt->OutstandingSends++;
NdisReleaseSpinLock(&pAdapt->Lock);
NdisSend(&Status,
pAdapt->BindingHandle,
Packet);
if (Status != NDIS_STATUS_PENDING)
{
ADAPT_DECR_PENDING_SENDS(pAdapt);
}
return(Status);
}
}
#endif // NDIS51
//
// We are either not using packet stacks, or there isn't stack space
// in the original packet passed down to us. Allocate a new packet
// to wrap the data with.
//
//
// If the below miniport is going to low power state, stop sending down any packet.
//
NdisAcquireSpinLock(&pAdapt->Lock);
if (pAdapt->PTDeviceState > NdisDeviceStateD0)
{
NdisReleaseSpinLock(&pAdapt->Lock);
return NDIS_STATUS_FAILURE;
}
pAdapt->OutstandingSends++;
NdisReleaseSpinLock(&pAdapt->Lock);
NdisAllocatePacket(&Status,
&MyPacket,
pAdapt->SendPacketPoolHandle);
if (Status == NDIS_STATUS_SUCCESS)
{
PSEND_RSVD SendRsvd;
//
// Save a pointer to the original packet in our reserved
// area in the new packet. This is needed so that we can
// get back to the original packet when the new packet's send
// is completed.
//
SendRsvd = (PSEND_RSVD)(MyPacket->ProtocolReserved);
SendRsvd->OriginalPkt = Packet;
NdisGetPacketFlags(MyPacket) = Flags;
//
// Set up the new packet so that it describes the same
// data as the original packet.
//
NDIS_PACKET_FIRST_NDIS_BUFFER(MyPacket) = NDIS_PACKET_FIRST_NDIS_BUFFER(Packet);
NDIS_PACKET_LAST_NDIS_BUFFER(MyPacket) = NDIS_PACKET_LAST_NDIS_BUFFER(Packet);
#ifdef WIN9X
//
// Work around the fact that NDIS does not initialize this
// to FALSE on Win9x.
//
NDIS_PACKET_VALID_COUNTS(MyPacket) = FALSE;
#endif
//
// Copy the OOB Offset from the original packet to the new
// packet.
//
NdisMoveMemory(NDIS_OOB_DATA_FROM_PACKET(MyPacket),
NDIS_OOB_DATA_FROM_PACKET(Packet),
sizeof(NDIS_PACKET_OOB_DATA));
#ifndef WIN9X
//
// Copy the right parts of per packet info into the new packet.
// This API is not available on Win9x since task offload is
// not supported on that platform.
//
NdisIMCopySendPerPacketInfo(MyPacket, Packet);
#endif
//
// Copy the Media specific information
//
NDIS_GET_PACKET_MEDIA_SPECIFIC_INFO(Packet,
&MediaSpecificInfo,
&MediaSpecificInfoSize);
if (MediaSpecificInfo || MediaSpecificInfoSize)
{
NDIS_SET_PACKET_MEDIA_SPECIFIC_INFO(MyPacket,
MediaSpecificInfo,
MediaSpecificInfoSize);
}
NdisSend(&Status,
pAdapt->BindingHandle,
MyPacket);
if (Status != NDIS_STATUS_PENDING)
{
#ifndef WIN9X
NdisIMCopySendCompletePerPacketInfo (Packet, MyPacket);
#endif
NdisFreePacket(MyPacket);
ADAPT_DECR_PENDING_SENDS(pAdapt);
}
}
else
{
ADAPT_DECR_PENDING_SENDS(pAdapt);
//
// We are out of packets. Silently drop it. Alternatively we can deal with it:
// - By keeping separate send and receive pools
// - Dynamically allocate more pools as needed and free them when not needed
//
}
return(Status);
}
VOID
MPSendPackets(
IN NDIS_HANDLE MiniportAdapterContext,
IN PPNDIS_PACKET PacketArray,
IN UINT NumberOfPackets
)
/*++
Routine Description:
Send Packet Array handler. Either this or our SendPacket handler is called
based on which one is enabled in our Miniport Characteristics.
Arguments:
MiniportAdapterContext Pointer to our adapter
PacketArray Set of packets to send
NumberOfPackets Self-explanatory
Return Value:
None
--*/
{
PADAPT pAdapt = (PADAPT)MiniportAdapterContext;
NDIS_STATUS Status;
UINT i;
PVOID MediaSpecificInfo = NULL;
UINT MediaSpecificInfoSize = 0;
for (i = 0; i < NumberOfPackets; i++)
{
PNDIS_PACKET Packet, MyPacket;
Packet = PacketArray[i];
//
// The driver should fail the send if the virtual miniport is in low
// power state
//
if (pAdapt->MPDeviceState > NdisDeviceStateD0)
{
NdisMSendComplete(ADAPT_MINIPORT_HANDLE(pAdapt),
Packet,
NDIS_STATUS_FAILURE);
continue;
}
#ifdef NDIS51
//
// Use NDIS 5.1 packet stacking:
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