Ping

How would one go about pinging a computer on a local LAN in vb6?

VB Code:

'Place a Listbox, a command button, and a text box on your form.
'Call the command button cmdPing and the textbox txtPing
 
Private Const IP_STATUS_BASE = 11000
Private Const IP_SUCCESS = 0
Private Const IP_BUF_TOO_SMALL = (11000 + 1)
Private Const IP_DEST_NET_UNREACHABLE = (11000 + 2)
Private Const IP_DEST_HOST_UNREACHABLE = (11000 + 3)
Private Const IP_DEST_PROT_UNREACHABLE = (11000 + 4)
Private Const IP_DEST_PORT_UNREACHABLE = (11000 + 5)
Private Const IP_NO_RESOURCES = (11000 + 6)
Private Const IP_BAD_OPTION = (11000 + 7)
Private Const IP_HW_ERROR = (11000 + 8)
Private Const IP_PACKET_TOO_BIG = (11000 + 9)
Private Const IP_REQ_TIMED_OUT = (11000 + 10)
Private Const IP_BAD_REQ = (11000 + 11)
Private Const IP_BAD_ROUTE = (11000 + 12)
Private Const IP_TTL_EXPIRED_TRANSIT = (11000 + 13)
Private Const IP_TTL_EXPIRED_REASSEM = (11000 + 14)
Private Const IP_PARAM_PROBLEM = (11000 + 15)
Private Const IP_SOURCE_QUENCH = (11000 + 16)
Private Const IP_OPTION_TOO_BIG = (11000 + 17)
Private Const IP_BAD_DESTINATION = (11000 + 18)
Private Const IP_ADDR_DELETED = (11000 + 19)
Private Const IP_SPEC_MTU_CHANGE = (11000 + 20)
Private Const IP_MTU_CHANGE = (11000 + 21)
Private Const IP_UNLOAD = (11000 + 22)
Private Const IP_ADDR_ADDED = (11000 + 23)
Private Const IP_GENERAL_FAILURE = (11000 + 50)
Private Const MAX_IP_STATUS = 11000 + 50
Private Const IP_PENDING = (11000 + 255)
Private Const PING_TIMEOUT = 200
Private Const WS_VERSION_REQD = &H101
Private Const WS_VERSION_MAJOR = WS_VERSION_REQD \ &H100 And &HFF&
Private Const WS_VERSION_MINOR = WS_VERSION_REQD And &HFF&
Private Const MIN_SOCKETS_REQD = 1
Private Const SOCKET_ERROR = -1
Private Const MAX_WSADescription = 256
Private Const MAX_WSASYSStatus = 128
 
Private 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
 
Private Type ICMP_ECHO_REPLY
    Address         As Long
    status          As Long
    RoundTripTime   As Long
    DataSize        As Integer
    Reserved        As Integer
    DataPointer     As Long
    Options         As ICMP_OPTIONS
    Data            As String * 250
End Type
 
Private Type HOSTENT
    hName As Long
    hAliases As Long
    hAddrType As Integer
    hLen As Integer
    hAddrList As Long
End Type
 
Private 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 IcmpCreateFile Lib "icmp.dll" () As Long
 
Private Declare Function IcmpCloseHandle Lib "icmp.dll" _
   (ByVal IcmpHandle As Long) As Long
   
Private 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
    
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 RtlMoveMemory Lib "kernel32" _
   (hpvDest As Any, _
    ByVal hpvSource As Long, _
    ByVal cbCopy As Long)
 
Private Function AddressStringToLong(ByVal tmp As String) As Long
 
   Dim i As Integer
   Dim parts(1 To 4) As String
   
   i = 0
  
   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
  
   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
 
Private Function GetStatusCode(status As Long) As String
 
   Dim msg As String
 
   Select Case status
      Case IP_SUCCESS:               msg = txtPing.Text & " is replying"
      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
 
Private Function HiByte(ByVal wParam As Integer)
    HiByte = wParam \ &H100 And &HFF&
End Function
 
Private Function LoByte(ByVal wParam As Integer)
    LoByte = wParam And &HFF&
End Function
 
Private 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)
   
   Call SocketsInitialize
   hPort = IcmpCreateFile()
   
   If IcmpSendEcho(hPort, _
                   dwAddress, _
                   sDataToSend, _
                   Len(sDataToSend), _
                   0, _
                   ECHO, _
                   Len(ECHO), _
                   PING_TIMEOUT) Then
   
         Ping = ECHO.RoundTripTime
   Else
         Ping = ECHO.status * -1
   End If
                       
   Call IcmpCloseHandle(hPort)
   Call SocketsCleanup
   
End Function
 
Private 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 = False
    Else
        SocketsCleanup = True
    End If
    
End Function
 
Private 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 = 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, vbExclamation
        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."
        MsgBox szBuf, vbExclamation
        SocketsInitialize = False
        Exit Function
    End If
    
    SocketsInitialize = True
        
End Function
 
Private Sub cmdPing_Click()
Dim ECHO As ICMP_ECHO_REPLY
   Dim pos As Integer
   Dim i As Integer
   Call Ping(txtPing.Text, ECHO)
  
  For i = 1 To 3
   List1.AddItem GetStatusCode(ECHO.status)
  Next
   List1.AddItem ECHO.Address
   List1.AddItem "Time: " & ECHO.RoundTripTime & " ms"
   List1.AddItem ECHO.DataSize & " bytes"
   
   If Left$(ECHO.Data, 1) <> Chr$(0) Then
      pos = InStr(ECHO.Data, Chr$(0))
      List1.AddItem Left$(ECHO.Data, pos - 1)
   End If
 
   List1.AddItem ECHO.DataPointer
End Sub

Or, ShellExecute

VB Code:

Option Explicit
 
Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, _
ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long
 
Private Const SW_SHOWNORMAL As Long = 1
Private Const SW_HIDE As Long = 0
 
Private Declare Function GetSystemDirectory Lib "kernel32" Alias "GetSystemDirectoryA" (ByVal lpBuffer As String, ByVal nSize As Long) As Long
 
Dim sSave As String, Ret As Long
 
Private Sub Form_Load()
    'KPD-Team 1998
    'URL: [url]http://www.allapi.net/[/url]
    'E-Mail: [email][email protected][/email]
    Dim sSave As String, Ret As Long
    'Create a buffer
    sSave = Space(255)
    'Get the system directory
    Ret = GetSystemDirectory(sSave, 255)
    'Remove all unnecessary chr$(0)'s
    sSave = Left$(sSave, Ret)
End Sub
 
Private Sub Command1_Click()
    ShellExecute Me.hwnd, "Open", sSave & "CMD.exe", " /c ping 192.168.1.101 c: > C:\Myfile.txt", "C:\", SW_SHOWNORMAL
End Sub

Which saves it to a file.

Actually Dave, I kind of like that short, sweet and to the purpose way.

I know it came from allapi.net, but what is the purpose of including GetSystemDirectory do you suppose?

I was going to take out the reference, because I have modified it to suit the purpose many times. I'm sure that it was needed for the original use of ShellExecute, but it isn't needed here. I had a different example that opened the txt file, but grabbed this one instead, and modified it.

I just tried Dave's code post, and I got an error with this:

VB Code:

Private Sub Command1_Click()
    ShellExecute Me.hwnd, "Open", sSave & "CMD.exe", " /c ping 192.168.1.101 c: > C:\Myfile.txt", "C:\", SW_SHOWNORMAL
End Sub

MyFile.txt displayed:

Bad parameter c:

I took out the c: so it read

VB Code:

Private Sub Command1_Click()
    ShellExecute Me.hwnd, "Open", sSave & "CMD.exe", " /c ping 192.168.1.101 > C:\Myfile.txt", "C:\", SW_SHOWNORMAL
End Sub

and it worked just fine.

Quote:

---

Originally Posted by dglienna

I was going to take out the reference, because I have modified it to suit the purpose many times. I'm sure that it was needed for the original use of ShellExecute, but it isn't needed here. I had a different example that opened the txt file, but grabbed this one instead, and modified it.

---

Oops...sorry my bad. I thought that came with the example from allapi.net

No problem...I've posted stuff that had extra stuff in as well 'cause I forgot to take it out. :D

Which one of these two would be faster to ping a large number of addresses? sorry, currently at work so I can't test them at the moment.

Quote:

---

Originally Posted by Psychotic

Which one of these two would be faster to ping a large number of addresses? sorry, currently at work so I can't test them at the moment.

---

Both of them will only ping one address at a time. You would have to make some modifications in order for it to ping more than one.

I could do that for you, but I need a little more information.

Where would this list of address be stored? A listbox? A db table?

I can take what Dave did (at least I can in theory....haven't actually tried it yet :D ), and put it through a loop so it would write all results off to a text file, but I need to know where the code will be looking for the addresses.

I used a Listbox and the code that I posted. Change what is in cmdPing to this

VB Code:

Private Sub cmdPing_Click()
Dim ECHO As ICMP_ECHO_REPLY
   Dim pos As Integer
   Dim i As Integer
   Dim j As Integer
Open "c:\ipping.txt" For Append As #1
For j = 0 To List1.ListCount - 1
   Call Ping(List1.List(i), ECHO)
  
  For i = 1 To 3
   Print #1, GetStatusCode(ECHO.status)
  Next
   Print #1, ECHO.Address
   Print #1, "Time: " & ECHO.RoundTripTime & " ms"
   Print #1, ECHO.DataSize & " bytes"
   
   If Left$(ECHO.Data, 1) <> Chr$(0) Then
      pos = InStr(ECHO.Data, Chr$(0))
      Print #1, Left$(ECHO.Data, pos - 1)
   End If
 
   Print #1, ECHO.DataPointer
Next
Close #1

Ok, I want to make an app that is just like the one I currently have but with a few minor changes.

I want the user (me) to input a range of ip addresses to scan and the app will produce a list of ips that are in use and hopefully the MAC address's of the devices connected as well as some other information.

I don't want to input a range of 100 ips and have to wait 15 minutes so the faster the better.

Quote:

---

Originally Posted by Hack

VB Code:

Dim ECHO As ICMP_ECHO_REPLY

---

Error at this line;"Compile error: User-defined type not defined".
What should I do?

Quote:

---

Originally Posted by g-mie

Error at this line;"Compile error: User-defined type not defined".
What should I do?

---

VB Code:

[B]Public[/B] Type ICMP_ECHO_REPLY
    Address         As Long
    status          As Long
    RoundTripTime   As Long
    DataSize        As Integer
    Reserved        As Integer
    DataPointer     As Long
    Options         As ICMP_OPTIONS
    Data            As String * 250
End Type

Same error, but now the error at 'Options As ICMP_OPTIONS' line.

It's all in Post #2

ok guys.
thanks for the info. its helping me.