本帖最后由 pusofalse 于 2012-2-22 20:28 编辑
连接前先将套接字模式设为非阻塞模式,调用连接函数时(au3中为TCPConnect,系统函数则是Ws2_32.dll中的connect)会立刻返回失败,而不会发生阻塞,连接正在后台进行,接着调用select函数,并指定一个超时时间,等待连接成功,如果等待超时,则关闭套接字句柄。
Const $tagTIMEVAL = "long Seconds;long Microseconds"
Const $tagFD_SET = "long NumberofSockets;handle Socket[64]"
Const $tagSOCKADDR = "word Family;word Port;long Address;ubyte Zero[8]"
Const $SOCKET_SUCCESS = 0
Const $SOCKET_ERROR = -1
TCPStartup()
$hSocket = _TCPConnectEx("10.1.0.110", 8899, 1000, 0)
If $hSocket < 1 Then
MsgBox(48, "Error", "Timed out.")
Else
MsgBox(48, "OK", "Connect successfully.")
EndIf
TCPCloseSocket($hSocket)
Func _WSAAccept($hSocket, $pSockAddr, $iSockAddr, $pCondition, $pContext = 0)
Local $iResult
$iResult = DllCall("Ws2_32.dll", "handle", "WSAAccept", "handle", $hSocket, "ptr", $pSockAddr, "long*", $iSockAddr, "ptr", $pCondition, "ptr", $pContext)
Return SetError(_soerr(), 0, $iResult[0])
EndFunc ;==>_WSAAccept
Func _TCPConnectEx($sIPAddress, $iPort, $iMilliseconds = 5000, $fBlocking = 1)
Local $hSocket = _socket(2, 1, 6)
If $hSocket < 1 Then Return SetError(@error, 0, 0)
If _ioctlsocket($hSocket, 0x8004667E, 1, "bool*") = $SOCKET_ERROR Then
Return SetError(@error, _closesocket($hSocket), 0)
EndIf
Local $tSockAddr = DllStructCreate($tagSOCKADDR)
Local $pSockAddr = DllStructGetPtr($tSockAddr)
DllStructSetData($tSockAddr, "Family", 2)
DllStructSetData($tSockAddr, "Port", _htons($iPort))
DllStructSetData($tSockAddr, "Address", _inet_addr($sIPAddress))
If _connect($hSocket, $pSockAddr, DllStructGetSize($tSockAddr)) = $SOCKET_SUCCESS Then
If $fBlocking Then
_ioctlsocket($hSocket, 0x8004667E, 0, "bool*")
EndIf
Return $hSocket
Else
Local $tWritefds = DllStructCreate($tagFD_SET)
Local $pWritefds = DllStructGetPtr($tWritefds)
DllStructSetData($tWritefds, "NumberofSockets", 1)
DllStructSetData($tWritefds, "Socket", $hSocket, 1)
If _select(0, $pWritefds, 0, $iMilliseconds) = 0 Then
Return SetError(10060, _closesocket($hSocket), 0)
EndIf
If $fBlocking Then
_ioctlsocket($hSocket, 0x8004667E, 0, "bool*")
EndIf
Return $hSocket
EndIf
EndFunc ;==>_TCPConnectEx
Func _connect($hSocket, $pSockAddr, $iSockAddr)
Local $iResult
$iResult = DllCall("Ws2_32.dll", "long", "connect", "handle", $hSocket, "ptr", $pSockAddr, "long", $iSockAddr)
Return SetError(_soerr(), 0, $iResult[0])
EndFunc ;==>_connect
Func _htons($iHostWord)
Local $iResult
$iResult = DllCall("Ws2_32.dll", "word", "htons", "word", $iHostWord)
Return $iResult[0]
EndFunc ;==>_htons
Func _inet_addr($sIPAddress)
Local $iResult
$iResult = DllCall("Ws2_32.dll", "long", "inet_addr", "str", $sIPAddress)
Return $iResult[0]
EndFunc ;==>_inet_addr
Func _closesocket($hSocket)
Local $iResult
$iResult = DllCall("Ws2_32.dll", "long", "closesocket", "handle", $hSocket)
Return SetError(_soerr(), 0, $iResult[0])
EndFunc ;==>_closesocket
Func _soerr()
Local $iResult
$iResult = DllCall("Ws2_32.dll", "long", "WSAGetLastError")
Return $iResult[0]
EndFunc ;==>_soerr
Func _ioctlsocket($hSocket, $iCommand, $iValue, $sValueType = "long*")
Local $iResult
$iResult = DllCall("Ws2_32.dll", "long", "ioctlsocket", "handle", $hSocket, "long", $iCommand, $sValueType, $iValue)
Return SetError(_soerr(), 0, $iResult[0])
EndFunc ;==>_ioctlsocket
Func _socket($iAfamily, $iType, $iProtocol)
Local $iResult
$iResult = DllCall("Ws2_32.dll", "handle", "socket", "long", $iAfamily, "long", $iType, "long", $iProtocol)
Return SetError(_soerr(), 0, $iResult[0])
EndFunc ;==>_socket
Func _select($pReadfds, $pWritefds, $pExceptfds, $iMilliseconds = -1)
Local $tTimeval = DllStructCreate($tagTIMEVAL)
Local $pTimeval = DllStructGetPtr($tTimeval)
DllStructSetData($tTimeval, "Seconds", 0)
DllStructSetData($tTimeval, "Microseconds", $iMilliseconds * 1000)
Local $iResult
$iResult = DllCall("Ws2_32.dll", "long", "select", "long", 0, "ptr", $pReadfds, "ptr", $pWritefds, "ptr", $pExceptfds, "ptr", $pTimeval)
Return SetError(_soerr(), 0, $iResult[0])
EndFunc ;==>_select
|