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asp_web_howto thread: Machine name?
Message #1 by "GWEBU,SIPHIWE AS 9005425" <SIPHIWE@M...> on Fri, 19 Jan 2001 15:59 +0200
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--- Received from ABSA1.ABAG260 (xxx) xxx xxxx 19-01-01 13.59
Hi.
Is there a way of obtaining the client's machine name using VB?Any
input will be appreciated.
Siphiwe Gwebu
---- 19-01-01 13.59 ---- Sent to ---------------------------
-> asp_web_howto@p...
Message #2 by "Toby Anscombe" <tanscombe@m...> on Fri, 19 Jan 2001 13:13:32 -0000
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Private Declare Function GetComputerName Lib "kernel32" Alias
"GetComputerNameA" (ByVal lpBuffer As String, nSize As Long) As Long
Public Function ComputerName() As String
Dim buffer As String * 512, length As Long
length = Len(buffer)
If GetComputerName(buffer, length) Then
' this API returns non-zero if successful,
' and modifies the length argument
ComputerName = Left$(buffer, length)
End If
End Function
Note - this will return the name of the machine the process is running on
Regards
T
-----Original Message-----
From: GWEBU,SIPHIWE AS 9005425 [mailto:SIPHIWE@M...]
Sent: 19 January 2001 13:59
To: ASP Web HowTo
Subject: [asp_web_howto] Machine name?
--- Received from ABSA1.ABAG260 (xxx) xxx xxxx 19-01-01 13.59
Hi.
Is there a way of obtaining the client's machine name using VB?Any
input will be appreciated.
Siphiwe Gwebu
Message #3 by "JstMeHr4u3" <jstmehr4u3@h...> on Fri, 19 Jan 2001 11:51:04 -0800
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In asp you have to use the HTTP server vars. but here are two functions in
vb that will get IP address of local machine, and Machine name.
Option Explicit
Const MAX_WSADescription = 256
Const MAX_WSASYSStatus = 128
Const ERROR_SUCCESS As Long = 0
Const WS_VERSION_REQD As Long = &H101
Const WS_VERSION_MAJOR As Long = WS_VERSION_REQD \ &H100 And &HFF&
Const WS_VERSION_MINOR As Long = WS_VERSION_REQD And &HFF&
Const MIN_SOCKETS_REQD As Long = 1
Const SOCKET_ERROR As Long = -1
Public Type HOSTENT
hName As Long
hAliases As Long
hAddrType As Integer
hLen As Integer
hAddrList As Long
End Type
Public Type WSADATA
wVersion 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
Private Declare Function WSAGetLastError Lib "WSOCK32.DLL" () As Long
Private Declare Function WSAStartup Lib "WSOCK32.DLL" _
(ByVal wVersionRequired As Long, lpWSADATA As WSADATA) As Long
Private Declare Function WSACleanup Lib "WSOCK32.DLL" () As Long
Private Declare Function gethostname Lib "WSOCK32.DLL" _
(ByVal szHost As String, ByVal dwHostLen As Long) As Long
Private Declare Function gethostbyname Lib "WSOCK32.DLL" _
(ByVal szHost As String) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _
(hpvDest As Any, ByVal hpvSource As Long, ByVal cbCopy As Long)
Public Function GetIPAddress() As String
Dim sHostName As String * 256
Dim lpHost As Long
Dim HOST As HOSTENT
Dim dwIPAddr As Long
Dim tmpIPAddr() As Byte
Dim i As Integer
Dim sIPAddr As String
If Not SocketsInitialize() Then
GetIPAddress = ""
Exit Function
End If
'gethostname returns the name of the local host into
'the buffer specified by the name parameter. The host
'name is returned as a null-terminated string. The
'form of the host name is dependent on the Windows
'Sockets provider - it can be a simple host name, or
'it can be a fully qualified domain name. However, it
'is guaranteed that the name returned will be successfully
'parsed by gethostbyname and WSAAsyncGetHostByName.
'In actual application, if no local host name has been
'configured, gethostname must succeed and return a token
'host name that gethostbyname or WSAAsyncGetHostByName
'can resolve.
If gethostname(sHostName, 256) = SOCKET_ERROR Then
GetIPAddress = ""
MsgBox "Windows Sockets error " & Str$(WSAGetLastError()) & _
" has occurred. Unable to successfully get Host Name."
SocketsCleanup
Exit Function
End If
'gethostbyname returns a pointer to a HOSTENT structure
'- a structure allocated by Windows Sockets. The HOSTENT
'structure contains the results of a successful search
'for the host specified in the name parameter.
'The application must never attempt to modify this
'structure or to free any of its components. Furthermore,
'only one copy of this structure is allocated per thread,
'so the application should copy any information it needs
'before issuing any other Windows Sockets function calls.
'gethostbyname function cannot resolve IP address strings
'passed to it. Such a request is treated exactly as if an
'unknown host name were passed. Use inet_addr to convert
'an IP address string the string to an actual IP address,
'then use another function, gethostbyaddr, to obtain the
'contents of the HOSTENT structure.
sHostName = Trim$(sHostName)
lpHost = gethostbyname(sHostName)
If lpHost = 0 Then
GetIPAddress = ""
MsgBox "Windows Sockets are not responding. " & _
"Unable to successfully get Host Name."
SocketsCleanup
Exit Function
End If
'to extract the returned IP address, we have to copy
'the HOST structure and its members
CopyMemory HOST, lpHost, Len(HOST)
CopyMemory dwIPAddr, HOST.hAddrList, 4
'create an array to hold the result
ReDim tmpIPAddr(1 To HOST.hLen)
CopyMemory tmpIPAddr(1), dwIPAddr, HOST.hLen
'and with the array, build the actual address,
'appending a period between members
For i = 1 To HOST.hLen
sIPAddr = sIPAddr & tmpIPAddr(i) & "."
Next
'the routine adds a period to the end of the
'string, so remove it here
GetIPAddress = Mid$(sIPAddr, 1, Len(sIPAddr) - 1)
SocketsCleanup
End Function
Public Function GetIPHostName() As String
Dim sHostName As String * 256
If Not SocketsInitialize() Then
GetIPHostName = ""
Exit Function
End If
If gethostname(sHostName, 256) = SOCKET_ERROR Then
GetIPHostName = ""
MsgBox "Windows Sockets error " & Str$(WSAGetLastError()) & _
" has occurred. Unable to successfully get Host Name."
SocketsCleanup
Exit Function
End If
GetIPHostName = Left$(sHostName, InStr(sHostName, Chr(0)) - 1)
SocketsCleanup
End Function
Public Function HiByte(ByVal wParam As Integer) As Byte
'note: VB4-32 users should declare this function As Integer
HiByte = (wParam And &HFF00&) \ (&H100)
End Function
Public Function LoByte(ByVal wParam As Integer) As Byte
'note: VB4-32 users should declare this function As Integer
LoByte = wParam And &HFF&
End Function
Public Sub SocketsCleanup()
If WSACleanup() <> ERROR_SUCCESS Then
MsgBox "Socket error occurred in Cleanup."
End If
End Sub
Public Function SocketsInitialize() As Boolean
Dim WSAD As WSADATA
Dim sLoByte As String
Dim sHiByte As String
If WSAStartup(WS_VERSION_REQD, WSAD) <> ERROR_SUCCESS Then
MsgBox "The 32-bit Windows Socket is not responding."
SocketsInitialize = False
Exit Function
End If
If WSAD.wMaxSockets < MIN_SOCKETS_REQD Then
MsgBox "This application requires a minimum of " & _
CStr(MIN_SOCKETS_REQD) & " supported sockets."
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
sHiByte = CStr(HiByte(WSAD.wVersion))
sLoByte = CStr(LoByte(WSAD.wVersion))
MsgBox "Sockets version " & sLoByte & "." & sHiByte & _
" is not supported by 32-bit Windows Sockets."
SocketsInitialize = False
Exit Function
End If
'must be OK, so lets do it
SocketsInitialize = True
End Function
----- Original Message -----
From: "GWEBU,SIPHIWE AS 9005425" <SIPHIWE@M...>
To: "ASP Web HowTo" <asp_web_howto@p...>
Sent: Friday, January 19, 2001 5:59 AM
Subject: [asp_web_howto] Machine name?
--- Received from ABSA1.ABAG260 (xxx) xxx xxxx 19-01-01 13.59
Hi.
Is there a way of obtaining the client's machine name using VB?Any
input will be appreciated.
Siphiwe Gwebu
---- 19-01-01 13.59 ---- Sent to ---------------------------
-> asp_web_howto@p...
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