OK everyone . . . here is how to ping programmatically in Visual Basic. Sorry about the delay in posting it, but I had to find the code (I had it stashed away). Enjoy!
Option Explicit
Private Const IP_STATUS_BASE As Long = 11000 Private Const IP_SUCCESS As Long = 0 Private Const IP_BUF_TOO_SMALL As Long = (11000 + 1) Private Const IP_DEST_NET_UNREACHABLE As Long = (11000 + 2) Private Const IP_DEST_HOST_UNREACHABLE As Long = (11000 + 3) Private Const IP_DEST_PROT_UNREACHABLE As Long = (11000 + 4) Private Const IP_DEST_PORT_UNREACHABLE As Long = (11000 + 5) Private Const IP_NO_RESOURCES As Long = (11000 + 6) Private Const IP_BAD_OPTION As Long = (11000 + 7) Private Const IP_HW_ERROR As Long = (11000 + 8) Private Const IP_PACKET_TOO_BIG As Long = (11000 + 9) Private Const IP_REQ_TIMED_OUT As Long = (11000 + 10) Private Const IP_BAD_REQ As Long = (11000 + 11) Private Const IP_BAD_ROUTE As Long = (11000 + 12) Private Const IP_TTL_EXPIRED_TRANSIT As Long = (11000 + 13) Private Const IP_TTL_EXPIRED_REASSEM As Long = (11000 + 14) Private Const IP_PARAM_PROBLEM As Long = (11000 + 15) Private Const IP_SOURCE_QUENCH As Long = (11000 + 16) Private Const IP_OPTION_TOO_BIG As Long = (11000 + 17) Private Const IP_BAD_DESTINATION As Long = (11000 + 18) Private Const IP_ADDR_DELETED As Long = (11000 + 19) Private Const IP_SPEC_MTU_CHANGE As Long = (11000 + 20) Private Const IP_MTU_CHANGE As Long = (11000 + 21) Private Const IP_UNLOAD As Long = (11000 + 22) Private Const IP_ADDR_ADDED As Long = (11000 + 23) Private Const IP_GENERAL_FAILURE As Long = (11000 + 50) Private Const MAX_IP_STATUS As Long = (11000 + 50) Private Const IP_PENDING As Long = (11000 + 255) Private Const PING_TIMEOUT As Long = 500 Private Const WS_VERSION_REQD As Long = &H101 Private Const MIN_SOCKETS_REQD As Long = 1 Private Const SOCKET_ERROR As Long = -1 Private Const INADDR_NONE As Long = &HFFFFFFFF Private Const MAX_WSADescription As Long = 256 Private Const MAX_WSASYSStatus As Long = 128
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 Long wMaxUDPDG As Long dwVendorInfo As Long End Type
Private Type ICMP_OPTIONS Ttl As Byte Tos As Byte Flags As Byte OptionsSize As Byte OptionsData As Long End Type
Public Type ICMP_ECHO_REPLY Address As Long status As Long RoundTripTime As Long DataSize As Long '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 Declare Function gethostbyname Lib "WSOCK32.DLL" _ (ByVal hostname As String) As Long
Private Declare Sub CopyMemory Lib "kernel32" _ Alias "RtlMoveMemory" _ (xDest As Any, _ xSource As Any, _ ByVal nbytes As Long)
Private Declare Function lstrlenA Lib "kernel32" _ (lpString As Any) 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 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 Long, _ ByVal RequestOptions As Long, _ ReplyBuffer As ICMP_ECHO_REPLY, _ ByVal ReplySize As Long, _ ByVal Timeout As Long) As Long
Private Declare Function inet_addr Lib "WSOCK32.DLL" _ (ByVal s As String) As Long
'***************************************** Public Function Ping(strAddress As String, strDataToSend As String, ECHO As ICMP_ECHO_REPLY) As Long
'If Ping succeeds : '.RoundTripTime = 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 '.Status will be 0 ' 'If Ping fails .Status will be the error code
Dim lngPortHandle As Long Dim lngAddress As Long
'convert the address into a long representation lngAddress = inet_addr(strAddress)
'if dwAddress is valid If lngAddress <> INADDR_NONE Then
'return the status as ping success Ping = ECHO.status
'close the port handle Call IcmpCloseHandle(lngPortHandle)
End If 'If hPort
Else:
'the address format was probably invalid Ping = INADDR_NONE
End If
End Function
'***************************************** Public Function GetStatusCode(lngStatus As Long) As String
Dim msg As String
Select Case lngStatus Case IP_SUCCESS: msg = "ip success" Case INADDR_NONE: msg = "inet_addr: bad IP format" 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
'***************************************** Public Function GetIPFromHostName(ByVal strHostName As String) As String
'converts a host name to an IP address.
Dim nbytes As Long Dim ptrHosent As Long 'address of hostent structure Dim ptrName As Long 'address of name pointer Dim ptrAddress As Long 'address of address pointer Dim ptrIPAddress As Long Dim strAddress As String
'ptrName is the official name of the host (PC). 'If using the DNS or similar resolution system, 'it is the Fully Qualified Domain Name (FQDN) 'that caused the server to return a reply. 'If using a local hosts file, it is the first 'entry after the IP address. ptrName = ptrHosent
'Null-terminated list of addresses for the host. 'The Address is offset 12 bytes from the start of 'the HOSENT structure. Note: Here we are retrieving 'only the first address returned. To return more than 'one, define sAddress as a string array and loop through 'the 4-byte ptrIPAddress members returned. The last 'item is a terminating null. All addresses are returned 'in network byte order. ptrAddress = ptrHosent + 12
End Function '*****************************************
OK, here is where you need to call the function from. You will pass in an address (an IP address {204.246.72.50} or name {www.jeffmarler.com}) and the data that you wish to send in the ping. The results here are simply printed to the immediate window using Debug.print, but in a real app you could do whatever you wanted with the returned data. Now . . . back to the code!
'***************************************** Public Sub PingAddress(strAddressToResolve as string, strDataToSend as string)
Dim ECHO As ICMP_ECHO_REPLY Dim logPos As Long Dim lngSuccess As Long Dim strIPAddress As String
If SocketsInitialize() Then
'convert the host name into an IP address strIPAddress = GetIPFromHostName(strAddressToResolve) Debug.print "Resolved IP Address : " & strIPAddress
'ping the ip passing the address, text 'to use, and the ECHO structure lngSuccess = Ping(strIPAddress, strDataToSend, ECHO)
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