PING一个IP地址(向它发送一个数据包并等待回应)
本例演示了怎样通过API的调用向一个IP地址发送一个包的数据并等待回音。
新建一个工程，添加一个标准模块，写入以下代码：
Option Explicit
Public Const IP_STATUS_BASE = 11000
Public Const IP_SUCCESS = 0
Public Const IP_BUF_TOO_SMALL = (11000 + 1)
Public Const IP_DEST_NET_UNREACHABLE = (11000 + 2)
Public Const IP_DEST_HOST_UNREACHABLE = (11000 + 3)
Public Const IP_DEST_PROT_UNREACHABLE = (11000 + 4)
Public Const IP_DEST_PORT_UNREACHABLE = (11000 + 5)
Public Const IP_NO_RESOURCES = (11000 + 6)
Public Const IP_BAD_OPTION = (11000 + 7)
Public Const IP_HW_ERROR = (11000 + 8)
Public Const IP_PACKET_TOO_BIG = (11000 + 9)
Public Const IP_REQ_TIMED_OUT = (11000 + 10)
Public Const IP_BAD_REQ = (11000 + 11)
Public Const IP_BAD_ROUTE = (11000 + 12)
Public Const IP_TTL_EXPIRED_TRANSIT = (11000 + 13)
Public Const IP_TTL_EXPIRED_REASSEM = (11000 + 14)
Public Const IP_PARAM_PROBLEM = (11000 + 15)
Public Const IP_SOURCE_QUENCH = (11000 + 16)
Public Const IP_OPTION_TOO_BIG = (11000 + 17)
Public Const IP_BAD_DESTINATION = (11000 + 18)
武汉平面设计培训Public Const IP_ADDR_DELETED = (11000 + 19)
Public Const IP_SPEC_MTU_CHANGE = (11000 + 20)
Public Const IP_MTU_CHANGE = (11000 + 21)
Public Const IP_UNLOAD = (11000 + 22)
Public Const IP_ADDR_ADDED = (11000 + 23)
Public Const IP_GENERAL_FAILURE = (11000 + 50)
Public Const MAX_IP_STATUS = 11000 + 50
Public Const IP_PENDING = (11000 + 255)
Public Const PING_TIMEOUT = 200
niron
Public Const WS_VERSION_REQD = &H101
Public Const WS_VERSION_MAJOR = WS_VERSION_REQD \ &H100 And &HFF&
Public Const WS_VERSION_MINOR = WS_VERSION_REQD And &HFF&
Public Const MIN_SOCKETS_REQD = 1
cbd什么意思Public Const SOCKET_ERROR = -1
Public Const MAX_WSADescription = 256
Public Const MAX_WSASYSStatus = 128
Public Type ICMP_OPTIONS
Ttl As Byte
Tos As Byte
Flags As Byte
OptionsSize As Byte
OptionsData As Long
End Type
Dim ICMPOPT As ICMP_OPTIONS
themomentPublic Type ICMP_ECHO_REPLY
Address As Long
status As Long
RoundTripTime As Long
DataSize As Integer
Rerved As Integer
DataPointer As Long
Options As ICMP_OPTIONS
Data As String * 250
End Type
Public Type HOSTENT 考托福好还是雅思好
hName As Long
hAlias As Long
hAddrType As Integer
hLen As Integer
hAddrList As Long
End Type
Public Type WSADATA
phosphoruswVersion As Integer
wHighVersion As Integer
szDescription(0 To MAX_WSADescription) As Byte
szSystemStatus(0 To MAX_WSASYSStatus) As Byte
wMaxSockets As Integer
wMaxUDPDG As Integer
dwVendorInfo As Long
End Type
Public Declare Function IcmpCreateFile Lib "icmp.dll " () As Long
Public Declare Function IcmpCloHandle Lib "icmp.dll " (ByVal IcmpHandle As Long) As Long
Public Declare Function IcmpSendEcho Lib "icmp.dll " (ByVal IcmpHandle As Long, ByVal DestinationAddress As Long, ByVal RequestData As String, ByVal RequestSize As Integer, ByVal RequestOptions As Long, ReplyBuffer As ICMP_ECHO_REPLY, ByVal ReplySize As Long, ByVal Timeout As Long) As Long
Public Declare Function WSAGetLastError Lib "WSOCK32.DLL " () As Long
Public Declare Function WSAStartup Lib "WSOCK32.DLL " (ByVal wVersionRequired As Long, lpWSADATA As WSADATA) As Long
Public Declare Function WSACleanup Lib "WSOCK32.DLL " () As Long
Public Declare Function gethostname Lib "WSOCK32.DLL " (ByVal szHost As String, ByVal dwHostLen As Long) As Long
Public Declare Function gethostbyname Lib "WSOCK32.DLL " (ByVal szHost As String) As Long
Public Declare Sub RtlMoveMemory Lib "kernel32 " (hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)
Public Function GetStatusCode(status As Long) As String
Dim msg As String
Select Ca status
Ca IP_SUCCESS: msg = "ip success "
Ca IP_BUF_TOO_SMALL: msg = "ip buf too_small "
Ca IP_DEST_NET_UNREACHABLE: msg = "ip dest net unreachable "
Ca IP_DEST_HOST_UNREACHABLE: msg = "ip dest host unreachable "
Ca IP_DEST_PROT_UNREACHABLE: msg = "ip dest prot unreachable "
Ca IP_DEST_PORT_UNREACHABLE: msg = "ip dest port unreachable "
Ca IP_NO_RESOURCES: msg = "ip no resources "
Ca IP_BAD_OPTION: msg = "ip bad option "
Ca IP_HW_ERROR: msg = "ip hw_error "
Ca IP_PACKET_TOO_BIG: msg = "ip packet too_big "
Ca IP_REQ_TIMED_OUT: msg = "ip req timed out "
Ca IP_BAD_REQ: msg = "ip bad req "
Ca IP_BAD_ROUTE: msg = "ip bad route "
Ca IP_TTL_EXPIRED_TRANSIT: msg = "ip ttl expired transit "
Ca IP_TTL_EXPIRED_REASSEM: msg = "ip ttl expired reasm "
Ca IP_PARAM_PROBLEM: msg = "ip param_problem "
Ca IP_SOURCE_QUENCH: msg = "ip source quench "
Ca IP_OPTION_TOO_BIG: msg = "ip option too_big "
Ca IP_BAD_DESTINATION: msg = "ip bad destination "
Ca IP_ADDR_DELETED: msg = "ip addr deleted "
Ca IP_SPEC_MTU_CHANGE: msg = "ip spec mtu ch
ange "
Ca IP_MTU_CHANGE: msg = "ip mtu_change "
Ca IP_UNLOAD: msg = "ip unload "
Ca IP_ADDR_ADDED: msg = "ip addr added "
Ca IP_GENERAL_FAILURE: msg = "ip general failure "
Ca IP_PENDING: msg = "ip pending "
Ca PING_TIMEOUT: msg = "ping timeout "
Ca El: msg = "unknown msg returned "
End Select
GetStatusCode = CStr(status) & " [ " & msg & " ] "
End Function
初三中考英语作文
Public Function HiByte(ByVal wParam As Integer)
HiByte = wParam \ &H1 And &HFF&
End Function
Public Function LoByte(ByVal wParam As Integer)
LoByte = wParam And &HFF&
End Function
Public Function Ping(szAddress As String, ECHO As ICMP_ECHO_REPLY) As Long
Dim hPort As Long
Dim dwAddress As Long
Dim sDataToSend As String
Dim iOpt As Long
sDataToSend = "Echo This "
dwAddress = AddressStringToLong(szAddress)
hPort = IcmpCreateFile()
If IcmpSendEcho(hPort, dwAddress, sDataToSend, Len(sDataToSend), 0, ECHO, Len(ECHO), PING_TIMEOUT) Then
'the ping succeeded,
'.Status will be 0
'.RoundTripTime is the time in ms for the ping to complete,
'.Data is the data returned (NULL terminated)
'.Address is the Ip address that actually replied
'.DataSize is the size of the string in .Data
Ping = ECHO.RoundTripTime
El
Ping = ECHO.status * -1
End If
Call IcmpCloHandle(hPort)
End Function
Function AddressStringToLong(ByVal tmp As String) As Long
Dim i As Integer
Dim parts(1 To 4) As String
i = 0
'we have to extract each part of the
'123.456.789.123 string, delimited by 英语新闻网站
'a period
While InStr(tmp, ". ") > 0
i = i + 1
parts(i) = Mid(tmp, 1, InStr(tmp, ". ") - 1)
tmp = Mid(tmp, InStr(tmp, ". ") + 1)
Wend
i = i + 1
parts(i) = tmp
If i <> 4 Then
AddressStringToLong = 0
Exit Function
End If
'build the long value out of the 可可英语网
'hex of the extracted strings
AddressStringToLong = Val( "&H " & Right( "00 " & Hex(parts(4)), 2) & _
Right( "00 " & Hex(parts(3)), 2) & _
Right( "00 " & Hex(parts(2)), 2) & _
Right( "00 " & Hex(parts(1)), 2))
End Function
Public Function SocketsCleanup() As Boolean
Dim X As Long
X = WSACleanup()
If X <> 0 Then
MsgBox "Windows Sockets error " & Trim$(Str$(X)) & " occurred in Cleanup. ", vbExclamation
SocketsCleanup = Fal
El
SocketsCleanup = True
End If
End Function
Public Function SocketsInitialize() As Boolean
Dim WSAD As WSADATA
Dim X As Integer
Dim szLoByte As String, szHiByte As String, szBuf As String
X = WSAStartup(WS_VERSION_REQD, WSAD)
If X <> 0 Then
MsgBox "Windows Sockets for 32 bit Windows " & "environments is not successfully responding. "
SocketsInitialize = Fal
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, vbExclamation
SocketsInitialize = Fal
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. "
MsgBox szBuf, vbExclamation
SocketsInitialize = Fal
Exit Function
End If
哈利波特全集名字
SocketsInitialize = True
End Function
在Form中添加一个命令按钮Command1，一个文本框Text2，创建一个TextBox数组(Text1(0)到Text1(5))。在窗体中写入如下代码：
Private Sub Command1_Click()
Dim ECHO As ICMP_ECHO_REPLY
Dim pos As Integer
Call Ping(Text2.Text, ECHO)
Text1(0) = GetStatusCode(ECHO.status)
Text1(1) = ECHO.Address
Text1(2) = ECHO.RoundTripTime & " ms "
Text1(3) = ECHO.DataSize & " bytes "
If Left$(ECHO.Data, 1) <> Chr$(0) Then
pos = InStr(ECHO.Data, Chr$(0))
Text1(4) = Left$(ECHO.Data, pos - 1)
End If
Text1(5) = ECHO.DataPointer
End Sub
