module1.vb

Visual.Basic.NET实用编程百例-47.6M.zip

Module Module1
    Public Const IP_STATUS_BASE As Short = 11000
    Public Const IP_SUCCESS As Short = 0
    Public Const IP_BUF_TOO_SMALL As Short = (11000 + 1)
    Public Const IP_DEST_NET_UNREACHABLE As Short = (11000 + 2)
    Public Const IP_DEST_HOST_UNREACHABLE As Short = (11000 + 3)
    Public Const IP_DEST_PROT_UNREACHABLE As Short = (11000 + 4)
    Public Const IP_DEST_PORT_UNREACHABLE As Short = (11000 + 5)
    Public Const IP_NO_RESOURCES As Short = (11000 + 6)
    Public Const IP_BAD_OPTION As Short = (11000 + 7)
    Public Const IP_HW_ERROR As Short = (11000 + 8)
    Public Const IP_PACKET_TOO_BIG As Short = (11000 + 9)
    Public Const IP_REQ_TIMED_OUT As Short = (11000 + 10)
    Public Const IP_BAD_REQ As Short = (11000 + 11)
    Public Const IP_BAD_ROUTE As Short = (11000 + 12)
    Public Const IP_TTL_EXPIRED_TRANSIT As Short = (11000 + 13)
    Public Const IP_TTL_EXPIRED_REASSEM As Short = (11000 + 14)
    Public Const IP_PARAM_PROBLEM As Short = (11000 + 15)
    Public Const IP_SOURCE_QUENCH As Short = (11000 + 16)
    Public Const IP_OPTION_TOO_BIG As Short = (11000 + 17)
    Public Const IP_BAD_DESTINATION As Short = (11000 + 18)
    Public Const IP_ADDR_DELETED As Short = (11000 + 19)
    Public Const IP_SPEC_MTU_CHANGE As Short = (11000 + 20)
    Public Const IP_MTU_CHANGE As Short = (11000 + 21)
    Public Const IP_UNLOAD As Short = (11000 + 22)
    Public Const IP_ADDR_ADDED As Short = (11000 + 23)
    Public Const IP_GENERAL_FAILURE As Short = (11000 + 50)
    Public Const MAX_IP_STATUS As Short = 11000 + 50
    Public Const IP_PENDING As Short = (11000 + 255)
    Public Const PING_TIMEOUT As Short = 200
    Public Const WS_VERSION_REQD As Short = &H101S
    Public Const WS_VERSION_MAJOR As Boolean = WS_VERSION_REQD \ &H100S And &HFF
    Public Const WS_VERSION_MINOR As Boolean = WS_VERSION_REQD And &HFF
    Public Const MIN_SOCKETS_REQD As Short = 1
    Public Const SOCKET_ERROR As Short = -1

    Public Const MAX_WSADescription As Short = 256
    Public Const MAX_WSASYSStatus As Short = 128

    Public Structure ICMP_OPTIONS
        Dim Ttl As Byte
        Dim Tos As Byte
        Dim Flags As Byte
        Dim OptionsSize As Byte
        Dim OptionsData As Integer
    End Structure

    Dim ICMPOPT As ICMP_OPTIONS

    Public Structure ICMP_ECHO_REPLY
        Dim Address As Integer
        Dim status As Integer
        Dim RoundTripTime As Integer
        Dim DataSize As Short
        Dim Reserved As Short
        Dim DataPointer As Integer
        Dim Options As ICMP_OPTIONS
        <VBFixedString(250), System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst:=250)> Public Data As String
    End Structure


    Public Structure WSADATA
        Dim wVersion As Short
        Dim wHighVersion As Short
        <VBFixedArray(MAX_WSADescription)> Dim szDescription() As Byte
        <VBFixedArray(MAX_WSASYSStatus)> Dim szSystemStatus() As Byte
        Dim wMaxSockets As Short
        Dim wMaxUDPDG As Short
        Dim dwVendorInfo As Integer

        ' 必须调用“Initialize”来初始化此结构的实例。
        Public Sub Initialize()
            ReDim szDescription(MAX_WSADescription)
            ReDim szSystemStatus(MAX_WSASYSStatus)
        End Sub
    End Structure

    Public Declare Function IcmpCreateFile Lib "icmp.dll" () As Integer
    Public Declare Function IcmpCloseHandle Lib "icmp.dll" (ByVal IcmpHandle As Integer) As Integer
    Public Declare Function IcmpSendEcho Lib "icmp.dll" (ByVal IcmpHandle As Integer, ByVal DestinationAddress As Integer, ByVal RequestData As String, ByVal RequestSize As Short, ByVal RequestOptions As Integer, ByRef ReplyBuffer As ICMP_ECHO_REPLY, ByVal ReplySize As Integer, ByVal Timeout As Integer) As Integer
    Public Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As Integer
    Public Declare Function WSAStartup Lib "WSOCK32.DLL" (ByVal wVersionRequired As Integer, ByRef lpWSADATA As WSADATA) As Integer
    Public Declare Function WSACleanup Lib "WSOCK32.DLL" () As Integer

    Public Function GetStatusCode(ByRef status As Integer) As String
        Dim msg As String

        Select Case status
            Case IP_SUCCESS : msg = "ip success"
            Case IP_BUF_TOO_SMALL : msg = "ip buf too_small"
            Case IP_DEST_NET_UNREACHABLE : msg = "ip dest net unreachable"
            Case IP_DEST_HOST_UNREACHABLE : msg = "ip dest host unreachable"
            Case IP_DEST_PROT_UNREACHABLE : msg = "ip dest prot unreachable"
            Case IP_DEST_PORT_UNREACHABLE : msg = "ip dest port unreachable"
            Case IP_NO_RESOURCES : msg = "ip no resources"
            Case IP_BAD_OPTION : msg = "ip bad option"
            Case IP_HW_ERROR : msg = "ip hw_error"
            Case IP_PACKET_TOO_BIG : msg = "ip packet too_big"
            Case IP_REQ_TIMED_OUT : msg = "ip req timed out"
            Case IP_BAD_REQ : msg = "ip bad req"
            Case IP_BAD_ROUTE : msg = "ip bad route"
            Case IP_TTL_EXPIRED_TRANSIT : msg = "ip ttl expired transit"
            Case IP_TTL_EXPIRED_REASSEM : msg = "ip ttl expired reassem"
            Case IP_PARAM_PROBLEM : msg = "ip param_problem"
            Case IP_SOURCE_QUENCH : msg = "ip source quench"
            Case IP_OPTION_TOO_BIG : msg = "ip option too_big"
            Case IP_BAD_DESTINATION : msg = "ip bad destination"
            Case IP_ADDR_DELETED : msg = "ip addr deleted"
            Case IP_SPEC_MTU_CHANGE : msg = "ip spec mtu change"
            Case IP_MTU_CHANGE : msg = "ip mtu_change"
            Case IP_UNLOAD : msg = "ip unload"
            Case IP_ADDR_ADDED : msg = "ip addr added"
            Case IP_GENERAL_FAILURE : msg = "ip general failure"
            Case IP_PENDING : msg = "ip pending"
            Case PING_TIMEOUT : msg = "ping timeout"
            Case Else : msg = "unknown  msg returned"
        End Select

        GetStatusCode = CStr(status) & "   [ " & msg & " ]"
    End Function

    Public Function HiByte(ByVal wParam As Short) As Object
        HiByte = wParam \ &H100S And &HFF
    End Function

    Public Function LoByte(ByVal wParam As Short) As Object
        LoByte = wParam And &HFF
    End Function

    Public Function Ping(ByRef szAddress As String, ByRef ECHO As ICMP_ECHO_REPLY) As Integer
        Dim hPort As Integer
        Dim dwAddress As Integer
        Dim sDataToSend As String
        Dim iOpt As Integer

        sDataToSend = "My Request"
        dwAddress = AddressStringToLong(szAddress)

        Call SocketsInitialize()
        hPort = IcmpCreateFile()

        If IcmpSendEcho(hPort, dwAddress, sDataToSend, Len(sDataToSend), 0, ECHO, Len(ECHO), PING_TIMEOUT) Then
            'Ping如果成功
            '.Status返回0
            '.RoundTripTime是Ping完成的时间，单位为Ms
            '.Data是返回的数据
            '.Address是接受响应的Ip地址
            '.DataSize是接受数据.Data的大小
            Ping = ECHO.RoundTripTime
        Else : Ping = ECHO.status * -1
        End If

        Call IcmpCloseHandle(hPort)
        Call SocketsCleanup()

    End Function

    Function AddressStringToLong(ByVal tmp As String) As Integer
        '给定的Ip地址是10.8.8.70的格式，实际接受的是一个16进制的长整型的值
        Dim i As Short
        Dim parts(4) As String

        i = 0

        While InStr(tmp, ".") > 0
            parts(i) = Mid(tmp, 1, InStr(tmp, ".") - 1)
            tmp = Mid(tmp, InStr(tmp, ".") + 1)
            i = i + 1
        End While
        parts(i) = tmp
        If i <> 3 Then
            AddressStringToLong = 0
            Exit Function
        End If

        AddressStringToLong = Val("&H" & Right("00" & Hex(CInt(parts(3))), 2) & Right("00" & Hex(CInt(parts(2))), 2) & Right("00" & Hex(CInt(parts(1))), 2) & Right("00" & Hex(CInt(parts(0))), 2))

    End Function

    Public Function SocketsCleanup() As Boolean

        Dim X As Integer

        X = WSACleanup()
        If X <> 0 Then
            SocketsCleanup = False
        Else
            SocketsCleanup = True
        End If
    End Function

    Public Function SocketsInitialize() As Boolean

        Dim WSAD As WSADATA
        Dim X As Short
        Dim szHiByte, szLoByte, szBuf As String



        If X <> 0 Then
            MsgBox("Windows Sockets for 32 bit Windows " & "environments is not successfully responding.")
            SocketsInitialize = False
            Exit Function
        End If

        If LoByte(WSAD.wVersion) < WS_VERSION_MAJOR Or (LoByte(WSAD.wVersion) = WS_VERSION_MAJOR And HiByte(WSAD.wVersion) < WS_VERSION_MINOR) Then

            szHiByte = Trim(Str(HiByte(WSAD.wVersion)))
            szLoByte = Trim(Str(LoByte(WSAD.wVersion)))
            szBuf = "Windows Sockets Version " & szLoByte & "." & szHiByte
            szBuf = szBuf & " is not supported by Windows " & "Sockets for 32 bit Windows environments."
            MsgBox(szBuf, MsgBoxStyle.Exclamation)
            SocketsInitialize = False
            Exit Function

        End If

        If WSAD.wMaxSockets < MIN_SOCKETS_REQD Then
            szBuf = "This application requires a minimum of " & Trim(Str(MIN_SOCKETS_REQD)) & " supported sockets."
            SocketsInitialize = False
            Exit Function
        End If

        SocketsInitialize = True
    End Function
End Module