UDPSend
在打开的套接字上面发送数据.
UDPSend ( socketarray, data )
参数
socketarray
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使用 UDPOpen() 函数返回的主套接字/数组
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data
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套接字连接发送的二进制数据/字符串
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返回值
成功:
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返回套接字发送的字节数.
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失败:
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@error 设置 为非 0 值.
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@error:
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-3 或 -4 套接字数组无效.
1 - IP 地址错误.
2 - 端口错误.
或 windows API WSAGetError 的返回值(见 MSDN)
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相关
UDPBind, UDPOpen, UDPRecv
函数示例
#include <GUIConstantsEx.au3>
#include <MsgBoxConstants.au3>
; Start First clicking on "1. Server"
; Then start a second instance of the script selecting "2. Client"
Example()
Func Example()
UDPStartup() ; Start the UDP service.
; Register OnAutoItExit to be called when the script is closed.
OnAutoItExitRegister("OnAutoItExit")
; Assign Local variables the loopback IP Address and the Port.
Local $sIPAddress = "127.0.0.1" ; This IP Address only works for testing on your own computer.
Local $iPort = 65532 ; Port used for the connection.
#Region GUI
Local $sTitle = "UDP Start"
Local $hGUI = GUICreate($sTitle, 250, 70)
Local $idBtnServer = GUICtrlCreateButton("1. Server", 65, 10, 130, 22)
Local $idBtnClient = GUICtrlCreateButton("2. Client", 65, 40, 130, 22)
GUISetState(@SW_SHOW, $hGUI)
While 1
Switch GUIGetMsg()
Case $GUI_EVENT_CLOSE
ExitLoop
Case $idBtnServer
WinSetTitle($sTitle, "", "UDP Server started")
GUICtrlSetState($idBtnClient, $GUI_HIDE)
GUICtrlSetState($idBtnServer, $GUI_DISABLE)
If Not MyUDP_Server($sIPAddress, $iPort) Then ExitLoop
Case $idBtnClient
WinSetTitle($sTitle, "", "UDP Client started")
GUICtrlSetState($idBtnServer, $GUI_HIDE)
GUICtrlSetState($idBtnClient, $GUI_DISABLE)
If Not MyUDP_Client($sIPAddress, $iPort) Then ExitLoop
EndSwitch
Sleep(10)
WEnd
#EndRegion GUI
EndFunc ;==>Example
Func MyUDP_Server($sIPAddress, $iPort)
; Assign a Local variable the socket and bind to the IP Address and Port specified.
Local $iSocket = UDPBind($sIPAddress, $iPort)
; If an error occurred display the error code and return False.
If @error Then
; Someone is probably already binded on this IP Address and Port (script already running?).
Local $iError = @error
MsgBox(BitOR($MB_SYSTEMMODAL, $MB_ICONHAND), "", "Server:" & @CRLF & "Could not bind, Error code: " & $iError)
Return False
EndIf
; Assign a Local variable to store the data received.
Local $sReceived = ""
Do
; We are waiting for the string "toto" OR "tata" (example script UDPSend): 4 bytes length.
$sReceived = UDPRecv($iSocket, 4)
Until $sReceived <> ""
; Notes: If you don't know how much length will be the data,
; use e.g: 2048 for maxlen parameter and call the function until the it returns nothing/error.
; Display the string received.
MsgBox($MB_SYSTEMMODAL, "", "Server:" & @CRLF & "Received: " & $sReceived)
; Close the socket.
UDPCloseSocket($iSocket)
EndFunc ;==>MyUDP_Server
Func MyUDP_Client($sIPAddress, $iPort)
; Assign a Local variable the socket and connect to a listening socket with the IP Address and Port specified.
Local $iSocket = UDPOpen($sIPAddress, $iPort)
Local $iError = 0
; If an error occurred display the error code and return False.
If @error Then
; The server is probably offline/port is not opened on the server.
$iError = @error
MsgBox(BitOR($MB_SYSTEMMODAL, $MB_ICONHAND), "", "Client:" & @CRLF & "Could not connect, Error code: " & $iError)
Return False
EndIf
; Send the string "toto" converted to binary to the server.
UDPSend($iSocket, StringToBinary("toto"))
; If an error occurred display the error code and return False.
If @error Then
$iError = @error
MsgBox(BitOR($MB_SYSTEMMODAL, $MB_ICONHAND), "", "Client:" & @CRLF & "Could not send the data, Error code: " & $iError)
Return False
EndIf
; Close the socket.
UDPCloseSocket($iSocket)
EndFunc ;==>MyUDP_Client
Func OnAutoItExit()
UDPShutdown() ; Close the UDP service.
EndFunc ;==>OnAutoItExit
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