'强人的api winsock

Declare Function bind Lib "ws2_32.dll" (ByVal s As Long,addr As SOCK_ADDR,ByVal namelen As Long) As Long
Declare Function closesocket Lib "ws2_32.dll" (ByVal s As Long) As Long
Declare Function connect Lib "ws2_32.dll" (ByVal s As Long,name As SOCK_ADDR,ByVal namelen As Integer) As Long
Declare Function inet_addr Lib "ws2_32.dll" (ByVal cp As String) As Long
Declare Function htons Lib "ws2_32.dll" (ByVal hostshort As Integer) As Integer
Declare Function recv Lib "ws2_32.dll" (ByVal s As Long,buffer As Any,ByVal length As Long,ByVal flags As Long) As Long
Declare Function send Lib "ws2_32.dll" (ByVal s As Long,ByVal flags As Long) As Long
Declare Function shutdown Lib "ws2_32.dll" (ByVal s As Long,ByVal how As Long) As Long
Declare Function ioctlsocket Lib "ws2_32.dll" (ByVal s As Long,ByVal v As Long,ut As Long) As Long
Declare Function socket Lib "ws2_32.dll" (ByVal af As Long,ByVal type_specification As Long,ByVal protocol As Long) As Long
Declare Function WSACancelBlockingCall Lib "ws2_32.dll" () As Long
Declare Function WSACleanup Lib "ws2_32.dll" () As Long
Declare Function WSAGetLastError Lib "ws2_32.dll" () As Long
Declare Function WSAStartup Lib "ws2_32.dll" (ByVal wVersionrequired As Integer,wsData As WSA_DATA) As Long
Declare Function WSASocketA Lib "ws2_32.dll" (ByVal af As Long,ByVal type1 As Long,ByVal protocol As Long,lpProtocolInfo As Long,g As Long,ByVal dwFlags As Long)
Declare Function WSAIoctl Lib "ws2_32.dll" (ByVal s As Long,ByVal dwIoControlCode As Long,lpvInBuffer As Long,ByVal cbInBuffer As Long,lpvOutBuffer As Long,ByVal cbOutBuffer As Long,lpcbBytesReturned As Long,lpOverlapped As Long,lpCompletionRoutine As Long) As Long


Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any,Source As Any,ByVal length As Long)

Public Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)

Public Const WSADESCRIPTION_LEN = 256
Public Const WSASYS_STATUS_LEN = 128

Type WSA_DATA
wVersion As Integer
wHighVersion As Integer
strDescription(WSADESCRIPTION_LEN + 1) As Byte
strSystemStatus(WSASYS_STATUS_LEN + 1) As Byte
iMaxSockets As Integer
iMaxUdpDg As Integer
lpVendorInfo As Long
End Type

Type IN_ADDR
S_addr As Long
End Type

Type SOCK_ADDR
sin_family As Integer
sin_port As Integer
sin_addr As IN_ADDR
sin_zero(0 To 7) As Byte
End Type


Type IPHeader
lenver As Byte
tos As Byte
len As Integer
ident As Integer
flags As Integer
ttl As Byte
proto As Byte
checksum As Integer
sourceIP As Long
destIP As Long
End Type

Const AF_INET = 2
Const SOCK_RAW = 3
Const IPPROTO_IP = 0
Const IPPROTO_TCP = 6
Const IPPROTO_UDP = 17
Const MAX_PACK_LEN = 65535
Const SOCKET_ERROR = -1&



Private mwsaData As WSA_DATA
Private m_hSocket As Long


Private msaLocalAddr As SOCK_ADDR

Private msaRemoteAddr As SOCK_ADDR


Sub Main()
Dim nResult As Long

nResult = WSAStartup(&H202,mwsaData)
If nResult <> WSANOERROR Then
MsgBox "Error en WSAStartup"
Exit Sub
End If

m_hSocket = socket(AF_INET,SOCK_RAW,IPPROTO_IP)
If (m_hSocket = INVALID_SOCKET) Then
MsgBox "Error in socket"
Exit Sub
End If


msaLocalAddr.sin_family = AF_INET
msaLocalAddr.sin_port = 0
msaLocalAddr.sin_addr.S_addr = inet_addr("192.168.1.71") '这里需要你自己的网卡的IP地址

nResult = bind(m_hSocket,msaLocalAddr,Len(msaLocalAddr))
If (nResult = SOCKET_ERROR) Then
MsgBox "Error in bind"
Exit Sub
End If

Dim InParamBuffer As Long
Dim BytesRet As Long
BytesRet = 0
InParamBuffer = 1


nResult = ioctlsocket(m_hSocket,&H98000001,1)


If nResult <> 0 Then
MsgBox "ioctlsocket"
Exit Sub
End If


Dim strData As String
Dim nReceived As Long


'截获来的数据放在BUFF里面
Dim Buff(0 To MAX_PACK_LEN) As Byte
Dim IPH As IPHeader

Do Until False '这个例子里，一直获取
DoEvents
nResult = recv(m_hSocket,Buff(0),MAX_PACK_LEN,0)
If nResult = SOCKET_ERROR Then
MsgBox "Error in RecvData::recv"
Exit Do
End If
CopyMemory IPH,Len(IPH) '为了访问方便
Select Case IPH.proto
Case IPPROTO_TCP
'frmHookTcpip.Text1.SelText = HexIp2DotIp(IPH.sourceIP)
'frmHookTcpip.Text1.SelText = " -----> "
'frmHookTcpip.Text1.SelText = HexIp2DotIp(IPH.destIP)
'frmHookTcpip.Text1.SelText = vbCrLf
Debug.Print HexIp2DotIp(IPH.sourceIP) & " -----> " & HexIp2DotIp(IPH.destIP)
End Select
Loop

nResult = shutdown(m_hSocket,2)
nResult = closesocket(m_hSocket)
nResult = WSACancelBlockingCall
nResult = WSACleanup
End Sub


Function HexIp2DotIp(ByVal ip As Long) As String
Dim s As String,p1 As String,p2 As String,p3 As String,p4 As String
s = Right("00000000" & Hex(ip),8)
p1 = Val("&h" & Mid(s,1,2))
p2 = Val("&h" & Mid(s,3,2))
p3 = Val("&h" & Mid(s,5,2))
p4 = Val("&h" & Mid(s,7,2))
HexIp2DotIp = p4 & "." & p3 & "." & p2 & "." & p1
End Function