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因廣大VB愛好者開發捕獲IP數據包的需要，我花了一個下午的工夫，終于把它整里出來了，由于時間關系，以下的數據分析部分寫的不是很詳細。以下代碼在WIN98+VB6.0上測試通過，主函數部分比較簡單，1。打開設備驅動程序，2。綁定網卡，3。設置捕獲數據，4。循環截獲IP包。
由于在WIN98下捕獲IP數據包，必須要使用VXD技術，它不像WIN2000（可以參照前二天寫的，“使用VB捕獲WIN2000下的IP數據包”），捕獲IP數據包不需要VXD文件，單單只要使用VB就可以了。因為編寫VXD的步驟比較麻煩，在以下的源代碼中，直接使用IPMAN中的VPACKET.VXD這個驅動程序�？梢栽诰W上比較容易得到，需要的朋友也可以跟我聯系。以下包含了截獲數據包的所有源代碼，只要把下面的代碼放到一個模塊（.BAS）文件中就可以了，里面信息截獲到以后，并沒有對數據做太多的處理，所有的數據都放在OutBuff數組中，只是簡單的分離出了以太網頭部m_EtherPacketHead，IP包頭部m_IPPacketHead，其中程序中只是簡單的輸出了源IP地址，目的IP地址，需要更進一不分析里面的內容，可以參照別的資料。在這里為了程序盡量的簡單，所以不過多的牽涉。進一步分析的內容可以添加到輸出內容的附近代碼就可以了。
'--------源代碼開始，放到.bas中即可以測試----------
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String, ByVal dwDesiredAccess As Long, ByVal dwShareMode As Long, lpSecurityAttributes As Long, ByVal dwCreationDisposition As Long, ByVal dwFlagsAndAttributes As Long, ByVal hTemplateFile As Long) As Long
Private Declare Function CreateEvent Lib "kernel32" Alias "CreateEventA" (ByVal lpEventAttributes As Long, ByVal bManualReset As Long, ByVal bInitialState As Long, ByVal lpName As String) As Long
Private Declare Function WaitForMultipleObjectsEx Lib "kernel32" (ByVal nCount As Long, lpHandles As Long, ByVal bWaitAll As Long, ByVal dwMilliseconds As Long, ByVal bAlertable As Long) As Long
Private Const INFINITE = &HFFFF
Private Const GENERIC_WRITE = &H40000000
Private Const GENERIC_READ = &H80000000
Private Const OPEN_EXISTING = 3
Private Const FILE_ATTRIBUTE_NORMAL = &H80
Private Const FILE_FLAG_OVERLAPPED = &H40000000
Private Const FILE_FLAG_DELETE_ON_CLOSE = &H4000000
Private Const ERROR_IO_INCOMPLETE = 996&
Private Const NDIS_PACKET_TYPE_DIRECTED = &H1
Private Const IOCTL_PROTOCOL_SET_OID = &H80000004
Private Const IOCTL_PROTOCOL_READ = &H80000010
Private Const OID_GEN_CURRENT_PACKET_FILTER = &H1010E
Private Const WAIT_FAILED = -1
Private Type OVERLAPPED
Internal As Long
InternalHigh As Long
offset As Long
OffsetHigh As Long
hEvent As Long
End Type
Type EtherAddr
AddrByte1 As Byte
AddrByte2 As Byte
AddrByte3 As Byte
AddrByte4 As Byte
AddrByte5 As Byte
AddrByte6 As Byte
End Type
Type EtherPacketHead
DestEther As EtherAddr
SourEther As EtherAddr
ServType As Integer
End Type
Type IPAddr
AddrByte(0 To 3) As Byte
End Type
Type IPPacketHead
VerHLen As Byte
Type1 As Byte
TtlLen As Integer
Id As Integer
FlgOff As Integer
TTL As Byte
Proto As Byte
ChkSum As Integer
SourIP As IPAddr
DestIP As IPAddr
End Type
Type PACKET_OID_DATA
Oid As Long
Length As Long
data As Byte
End Type
Private Declare Function DeviceIoControlAsString Lib "kernel32" Alias "DeviceIoControl" (ByVal hDevice As Long, ByVal dwIoControlCode As Long, ByVal lpInBuffer As String, ByVal nInBufferSize As Long, ByVal lpOutBuffer As String, ByVal nOutBufferSize As Long, lpBytesReturned As Long, lpOverlapped As OVERLAPPED) As Long
Private Declare Function DeviceIoControl Lib "kernel32" (ByVal hDevice As Long, ByVal dwIoControlCode As Long, lpInBuffer As Any, ByVal nInBufferSize As Long, lpOutBuffer As Any, ByVal nOutBufferSize As Long, lpBytesReturned As Long, lpOverlapped As OVERLAPPED) As Long
Private Declare Function GetOverlappedResult Lib "kernel32" (ByVal hFile As Long, lpOverlapped As OVERLAPPED, lpNumberOfBytesTransferred As Long, ByVal bWait As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Declare Sub ZeroMemory Lib "kernel32" Alias "RtlZeroMemory" (ByVal dest As Long, ByVal numbytes As Long)
Private Declare Function GetLastError Lib "kernel32" () As Long
Const ETHER_PROTO_IP = &H8
Const IP_PROTO_TCP = &H6
Const ETHER_HEAD_LEN = 14
Const IP_HEAD_BYTE_LEN = 20
Dim bFirst As Boolean
Const SYSERR = -1
Const BUFFER_SIZE = 16384
Const nREAD = 1
Type PacketTable
hEvent As Long
Active As Boolean
Overlap As OVERLAPPED
Size As Long
Buffer(BUFFER_SIZE) As Byte
Length As Long
Type As Integer
End Type
Const RECV_MAX = 32
Dim RecvTab(RECV_MAX) As PacketTable
Dim EventTab(RECV_MAX) As Long
Dim InBuff(1514) As Byte
Dim OutBuff(1514) As Byte
Function Bind(hVxD As Long, inBuffer As String) As Boolean
Dim hEvent As Long
Dim cbRet As Long
Dim ovlp As OVERLAPPED
Dim result As Long
Dim cbIn As Long
cbIn = 5
hEvent = CreateEvent(0, 1, 0, vbNullString)
If hEvent = 0 Then
Bind = False
MsgBox "err bind"
Exit Function
End If
ovlp.hEvent = hEvent
'((0x8000) << 16) | ((0) << 14) | ((7) << 2) | (0))
Const IOCTL_PROTOCOL_BIND = &H8000001C
result = DeviceIoControlAsString(hVxD, _
IOCTL_PROTOCOL_BIND, _
ByVal inBuffer, _
cbIn, _
ByVal inBuffer, _
cbIn, _
cbRet, _
ovlp)
If (result = 0) Then
Call GetOverlappedResult(hVxD, ovlp, cbRet, True)
End If
Call CloseHandle(hEvent)
Bind = True
End Function
Function QueryPacket(ByVal hVxD As Long, ByVal ioctl As Long, ByVal cbIn As Long, ByVal cbOut As Long) As Long
Dim hEvent As Long
Dim cbRet As Long
Dim ovlp As OVERLAPPED
Dim result As Long
hEvent = CreateEvent(0, 1, 0, vbNullString)
If hEvent = 0 Then
QueryPacket = False
MsgBox "err bind"
Exit Function
End If
ovlp.Internal = 0
ovlp.InternalHigh = 0
ovlp.offset = 0
ovlp.OffsetHigh = 0
ovlp.hEvent = hEvent
' ioc = &H80000018
result = DeviceIoControl(hVxD, ioctl, InBuff(0), cbIn, InBuff(0), cbOut, cbRet, ovlp)
If result = 0 Then
If (GetLastError() = ERROR_IO_PENDING) Then
MsgBox "Ok0"
Else
Call CloseHandle(hEvent)
Exit Function
End If
If (0 = GetOverlappedResult(hVxD, ovlp, cbRet, 0)) Then
If (GetLastError() = ERROR_IO_INCOMPLETE) Then
MsgBox "ok2"
Else
Call CloseHandle(hEvent)
Exit Function
End If
End If
result = GetOverlappedResult(hVxD, ovlp, cbRet, 1)
End If
QueryPacket = cbRet
End Function
Function QueryOid(hVxD As Long, ulOid As Long, ulLength As Long) As Long
Dim cbIn As Long
cbIn = 14 + ulLength
Dim cbRet As Long
Dim OidData As PACKET_OID_DATA
OidData.Oid = ulOid
OidData.Length = ulLength
OidData.data = 0
Dim ioctl As Long
Const OID_802_3_PERMANENT_ADDRESS = &H1010101
Const IOCTL_PROTOCOL_QUERY_OID = &H80000000
Const IOCTL_PROTOCOL_STATISTICS = &H80000008
If ulOid >= OID_802_3_PERMANENT_ADDRESS Then
ioctl = IOCTL_PROTOCOL_QUERY_OID
Else
ioctl = IOCTL_PROTOCOL_STATISTICS
End If
Call CopyMemory(InBuff(0), OidData, cbIn)
cbRet = QueryPacket(hVxD, ioctl, cbIn, cbIn)
QueryOid = cbRet
End Function
Function GetHardEtherAddr(ByVal hVxD As Long, petheraddr As EtherAddr) As Boolean
Dim nret As Long
Const OID_802_3_CURRENT_ADDRESS = &H1010102
nret = QueryOid(hVxD, OID_802_3_CURRENT_ADDRESS, 6)
If (nret > 0) Then
Call CopyMemory(petheraddr, InBuff(8), 6)
GetHardEtherAddr = True
Else
GetHardEtherAddr = False
End If
End Function
Function SetOid(ByVal hVxD As Long, ByVal ulOid As Long, ByVal ulLength As Long, ByVal data As Long) As Long
Dim cbIn As Long
Dim cbRet As Long
Dim OidData As PACKET_OID_DATA
Dim ioctl As Long
cbIn = 32
If (ulOid = OID_GEN_CURRENT_PACKET_FILTER) Then ioctl = IOCTL_PROTOCOL_SET_OID
OidData.Oid = ulOid
OidData.Length = ulLength
OidData.data = 1
CopyMemory InBuff(0), OidData, cbIn
cbRet = QueryPacket(hVxD, ioctl, cbIn, cbIn)
SetOid = 0
End Function
Function GetPacket(ByVal hVxD As Long, ByVal ioctl As Long, ByVal cbIn As Long, ByVal cbOut As Long) As Long
Dim hEvent As Long
Dim cbRet As Long
Dim ovlp As OVERLAPPED
Dim result As Long
hEvent = CreateEvent(0, 1, 0, vbNullString)
If hEvent = 0 Then
GetPacket = 0
Exit Function
End If
ovlp.hEvent = hEvent
result = DeviceIoControl(hVxD, ioctl, InBuff(0), cbIn, OutBuff(0), cbOut, cbRet, ovlp)
If (result = 0) Then Call GetOverlappedResult(hVxD, ovlp, cbRet, True)
GetPacket = cbRet
End Function
Function RecvPacket(ByVal hVxD As Long, ByVal pbuf As Variant) As Long
Dim hEvent As Long
Dim I As Long, J As Long, K As Long
Dim len1 As Long
If (bFirst) Then
For I = 0 To RECV_MAX - 1
hEvent = CreateEvent(0, 1, 0, vbNullString)
If (hEvent = 0) Then
MsgBox "ERROR"
RecvPacket = SYSERR
Exit Function
End If
RecvTab(I).hEvent = hEvent
RecvTab(I).Size = BUFFER_SIZE
RecvTab(I).Active = True
RecvTab(I).Type = nREAD
EventTab(I) = hEvent
Call RecvStart(hVxD, RecvTab(I))
Next
bFirst = False
End If
I = WaitForMultipleObjectsEx(RECV_MAX, EventTab(0), 0, INFINITE, 0)
If (I = WAIT_FAILED) Then
MsgBox "error WaitForMultipleObjectsEx"
RecvPacket = SYSERR
Exit Function
End If
For J = 0 To RECV_MAX - 1
If (EventTab(I) = RecvTab(J).hEvent) Then Exit For
Next
K = J
If (RecvTab(K).Type = nREAD And RecvTab(K).Active = True) Then
Call GetOverlappedResult(hVxD, RecvTab(K).Overlap, RecvTab(K).Length, 0)
If (RecvTab(K).Length > BUFFER_SIZE) Then RecvTab(K).Length = BUFFER_SIZE
Call CopyMemory(OutBuff(0), RecvTab(K).Buffer(0), RecvTab(K).Length)
len1 = RecvTab(K).Length
Call CloseHandle(RecvTab(K).hEvent)
For J = I + 1 To RECV_MAX - 1
EventTab(I) = EventTab(J)
I = I + 1
Next
hEvent = CreateEvent(0, 1, 0, vbNullString)
If (hEvent = 0) Then
MsgBox "ERROR CREATEEVENT"
RecvPacket = SYSERR
Exit Function
End If
RecvTab(K).hEvent = hEvent
'memset(RecvTab[k].Buffer,0,BUFFER_SIZE);
RecvTab(K).Size = BUFFER_SIZE
RecvTab(K).Active = True
RecvTab(K).Type = nREAD
EventTab(RECV_MAX - 1) = hEvent
Call RecvStart(hVxD, RecvTab(K))
RecvPacket = len1
Exit Function
Else
RecvPacket = SYSERR
End If
End Function
Function RecvStart(ByVal hVxD As Long, packtab As PacketTable) As Long
Dim result As Long
packtab.Overlap.Internal = 0
packtab.Overlap.InternalHigh = 0
packtab.Overlap.offset = 0
packtab.Overlap.OffsetHigh = 0
packtab.Overlap.hEvent = packtab.hEvent
result = DeviceIoControl(hVxD, _
IOCTL_PROTOCOL_READ, _
packtab.Buffer(0), _
packtab.Size, _
packtab.Buffer(0), _
packtab.Size, _
packtab.Length, _
packtab.Overlap)
If (result <> 0) Then
RecvStart = SYSERR
Else
RecvStart = 0
End If
End Function
Sub Main()
bFirst = True
Dim hVxD As Long
Dim m_EtherPacketHead As EtherPacketHead
Dim m_IPPacketHead As IPPacketHead
Dim m_EtherAddr As EtherAddr
hVxD = CreateFile("\\.\VPACKET.VXD", _
GENERIC_READ Or GENERIC_WRITE, _
0, _
0, _
OPEN_EXISTING, _
FILE_ATTRIBUTE_NORMAL Or _
FILE_FLAG_OVERLAPPED Or _
FILE_FLAG_DELETE_ON_CLOSE, _
0)
Bind hVxD, "0001"
Call GetHardEtherAddr(hVxD, m_EtherAddr)
SetOid hVxD, OID_GEN_CURRENT_PACKET_FILTER, 4, NDIS_PACKET_TYPE_DIRECTED
Do Until False
DoEvents
'result = GetPacket(hVxD, IOCTL_PROTOCOL_READ, 1514, 1514)
result = RecvPacket(hVxD, OutBuff)
If result = 0 Then Exit Do
If result <> SYSERR Then
Call CopyMemory(m_EtherPacketHead, OutBuff(0), ETHER_HEAD_LEN)
If m_EtherPacketHead.ServType = ETHER_PROTO_IP Then
Call CopyMemory(m_IPPacketHead, OutBuff(ETHER_HEAD_LEN), IP_HEAD_BYTE_LEN)
If m_IPPacketHead.Proto = IP_PROTO_TCP Then
Debug.Print "SourIP:", m_IPPacketHead.SourIP.AddrByte(0) & "." & m_IPPacketHead.SourIP.AddrByte(1) & "." & m_IPPacketHead.SourIP.AddrByte(2) & "." & m_IPPacketHead.SourIP.AddrByte(3)
Debug.Print "DestIP:", m_IPPacketHead.DestIP.AddrByte(0) & "." & m_IPPacketHead.DestIP.AddrByte(1) & "." & m_IPPacketHead.DestIP.AddrByte(2) & "." & m_IPPacketHead.DestIP.AddrByte(3)
End If
End If
End If
Loop
Call CloseHandle(hVxD)
End Sub
'----------------------源代碼結束-----------------
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