Imports System.Runtime.InteropServices
Public Class Form1
'http://social.msdn.microsoft.com/Forums/en-US/512c7fc3-fb32-4081-a8c2-451883abe9fb/dhcpclientinfovq-bclienttype
Declare Unicode Function DhcpEnumSubnetClients Lib "dhcpsapi" (ByVal ServerIpAddress As String, ByVal SubnetAddress As UInt32, ByRef ResumeHandle As IntPtr, ByVal PreferredMaximum As Integer, ByRef ClientInfo As IntPtr, ByRef ClientsRead As Integer, ByRef ClientsTotal As Integer) As Integer
<DllImport("dhcpsapi.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Public Shared Function DhcpSetClientInfo( _
ByVal ServerIpAddress As String, _
ByVal ClientInfo As IntPtr) As UInt32
End Function
<DllImport("dhcpsapi.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Public Shared Function DhcpSetClientInfoV4( _
ByVal ServerIpAddress As String, _
ByVal ClientInfoV4 As IntPtr) As UInt32
End Function
<DllImport("dhcpsapi.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Public Shared Function DhcpGetClientInfo( _
ByVal ServerIpAddress As String, _
ByRef SearchInfo As DHCP_SEARCH_INFO, _
ByRef ClientInfo As IntPtr) As UInt32
End Function
<DllImport("dhcpsapi.dll", SetLastError:=True, CharSet:=CharSet.Unicode)> _
Public Shared Function DhcpSetClientInfoVQ( _
ByVal ServerIpAddress As String, _
ByVal ClientInfo As IntPtr) As UInt32
End Function
<StructLayout(LayoutKind.Sequential)> _
Private Structure DHCP_IP_ARRAY
Dim NumElements As Int32
Dim Elements As IntPtr
End Structure
<StructLayout(LayoutKind.Sequential)> _
Private Structure DHCP_CLIENT_INFO_ARRAY
Dim NumElements As Integer
Dim Clients As IntPtr
End Structure
<StructLayout(LayoutKind.Sequential)> _
Private Structure DHCP_CLIENT_INFO
Dim ClientIpAddress As UInt32
Dim SubnetMask As UInt32
Dim ClientHardwareAddress As DHCP_BINARY_DATA
<MarshalAs(UnmanagedType.LPWStr)> Dim ClientName As String
<MarshalAs(UnmanagedType.LPWStr)> Dim ClientComment As String
Dim ClientLeaseExpires As MyDate_Time
Dim OwnerHost As DHCP_HOST_INFO
End Structure
<StructLayout(LayoutKind.Sequential)> _
Private Structure DHCP_CLIENT_INFOV4
Dim ClientIpAddress As UInt32
Dim SubnetMask As UInt32
Dim ClientHardwareAddress As DHCP_BINARY_DATA
<MarshalAs(UnmanagedType.LPWStr)> Dim ClientName As String
<MarshalAs(UnmanagedType.LPWStr)> Dim ClientComment As String
Dim ClientLeaseExpires As MyDate_Time
Dim OwnerHost As DHCP_HOST_INFO
Dim bClientType As DHCP_CLIENT_TYPE
End Structure
<StructLayout(LayoutKind.Sequential)> _
Public Structure DHCP_CLIENT_INFO_ARRAY_VQ
Dim NumElements As Integer
Dim Clients As IntPtr
End Structure
<StructLayout(LayoutKind.Sequential)> _
Private Structure DHCP_CLIENT_INFO_VQ
Dim ClientIpAddress As UInt32
Dim SubnetMask As UInt32
Dim ClientHardwareAddress As DHCP_BINARY_DATA
<MarshalAs(UnmanagedType.LPWStr)> Dim ClientName As String
<MarshalAs(UnmanagedType.LPWStr)> Dim ClientComment As String
Dim ClientLeaseExpires As MyDate_Time
Dim OwnerHost As DHCP_HOST_INFO
Dim bClientType As DHCP_CLIENT_TYPE
Dim AddressState As Byte
Dim Status As DHCP_QuarantineStatus
Dim ProbationEnds As MyDate_Time
Dim QuarantineCapable As Boolean
End Structure
Enum DHCP_CLIENT_TYPE As Byte
CLIENT_TYPE_DHCP = 1
CLIENT_TYPE_BOOTP = 2
CLIENT_TYPE_BOTH = 3
CLIENT_TYPE_RESERVATION_FLAG = 4
CLIENT_TYPE_NONE = &H64
End Enum
Enum DHCP_AddressState As Byte
CLIENT_TYPE_DHCP = 1
CLIENT_TYPE_BOOTP = 2
CLIENT_TYPE_BOTH = 3
CLIENT_TYPE_RESERVATION_FLAG = 4
CLIENT_TYPE_NONE = &H64
End Enum
Enum DHCP_QuarantineStatus As Byte
NOQUARANTINE = 0
RESTRICTEDACCESS = 1
DROPPACKET = 2
PROBATION = 3
EXEMPT = 4
DEFAULTQUARSETTING = 5
NOQUARINFO = 6
End Enum
<StructLayout(LayoutKind.Sequential)> _
Structure DHCP_DATE_TIME
Dim dwLowDateTime As Integer
Dim dwHighDateTime As Integer
End Structure
<StructLayout(LayoutKind.Sequential)> _
Structure DHCP_BINARY_DATA
Dim DataLength As Int32
Dim Data As IntPtr
End Structure
<StructLayout(LayoutKind.Sequential)> _
Private Structure MyDate_Time
<MarshalAs(UnmanagedType.U4)> _
Dim dwLowDateTime As UInt32
<MarshalAs(UnmanagedType.U4)> _
Dim dwHighDateTime As UInt32
Public Function ConvertIntToDateTime() As DateTime
If dwHighDateTime = 0 And dwLowDateTime = 0 Then Return DateTime.MinValue
If dwHighDateTime = Int32.MaxValue And dwLowDateTime = UInt32.MaxValue Then Return DateTime.MaxValue
Dim value As Long = dwHighDateTime
value <<= 32
value += dwLowDateTime
Return DateTime.FromFileTime(value)
End Function
Public Sub SetToReserved()
dwLowDateTime = 0
dwHighDateTime = 0
'Return DateTime.FromFileTime(value)
End Sub
Public Sub SetToInfinte()
dwLowDateTime = 4294967295
dwHighDateTime = 2147483647
'Return DateTime.FromFileTime(value)
End Sub
End Structure
<StructLayout(LayoutKind.Sequential)> _
Structure DHCP_HOST_INFO
Dim IpAddress As Int32
<MarshalAs(UnmanagedType.LPWStr)> _
Dim NetBiosName As String
<MarshalAs(UnmanagedType.LPWStr)> _
Dim HostName As String
End Structure
''' <summary>
''' ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
''' DHCP SERVER STRUCTS
''' </summary>
''' <remarks></remarks>
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> _
Public Structure DHCPDS_SERVER
Dim Version As UInt32
Dim ServerName As String
Dim ServerAddress As UInt32
Dim Flags As UInt32
Dim State As UInt32
Dim DsLocation As String
Dim DsLocType As UInt32
End Structure
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> _
Public Structure DHCPDS_SERVERS
Dim Flags As UInt32
Dim NumElements As UInt32
Dim Servers As IntPtr
End Structure
Declare Unicode Function DhcpEnumServers Lib "Dhcpsapi.dll" (ByVal Flags As UInt32, _
ByVal IdInfo As IntPtr, _
ByRef Servers As IntPtr, _
ByVal CallbackFn As IntPtr, _
ByVal CallbackData As IntPtr) As UInt32
''' <summary>
''' Sumery
''' </summary>
''' <returns></returns>
''' <remarks></remarks>
'''
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> _
Public Structure DHCP_IP_ADDRESS
Dim IPAddress As UInteger
End Structure
''' <summary>
''' Sumery
''' </summary>
''' <returns></returns>
''' <remarks></remarks>
'''
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)> Public Structure DHCP_SUBNET_INFO
Public SubnetAddress As UInteger
Public SubnetMask As UInteger
Public SubnetName As String
Public SubnetComment As String
'Public PrimaryHost As DHCP_HOST_INFO
Public SubnetState As DHCP_SUBNET_STATE
End Structure
Public Enum DHCP_SUBNET_STATE
DhcpSubnetEnabled = 0
DhcpSubnetDisabled = 1
DhcpSubnetEnabledSwitched = 2
DhcpSubnetDisabledSwitched = 3
DhcpSubnetInvalidState = 4
End Enum
Public Declare Unicode Function DhcpGetSubnetInfo Lib "Dhcpsapi" (ByVal ServerIpAddress As String, ByVal SubnetAddress As Integer, ByRef SubnetInfo As DHCP_SUBNET_INFO) As Integer
Public Declare Unicode Function DhcpEnumSubnets Lib "Dhcpsapi" (ByVal ServerIpAddress As String, ByRef ResumeHandle As Integer, ByVal PreferredMaximum As Integer, ByRef EnumInfo As IntPtr, ByRef ElementsRead As Integer, ByRef ElementsTotal As Integer) As Integer
Dim HowManyClients As Long = 0
Dim HowManyClientsAreAlreadyReserved As Long = 0
Dim HowManyClientsAreNeedToBechanged As Long = 0
Dim HowManyClientsHaveBadAddresses As Long = 0
Dim MachinesThatWillChange As String = vbNullString
Dim MachinesThatWillNotChange As String = vbNullString
Dim ServerIPAddress As String = "10.10.10.10"
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim ts = Stopwatch.StartNew
' Your code goes here
EnumAll()
Debug.WriteLine("How many clients: " & HowManyClients)
Debug.WriteLine("How many clients are already reserved: " & HowManyClientsAreAlreadyReserved)
Debug.WriteLine("How many clients need to be changed: " & (HowManyClientsAreNeedToBechanged - HowManyClientsHaveBadAddresses))
Debug.WriteLine("How many clients have bad addresses: " & HowManyClientsHaveBadAddresses)
Debug.WriteLine("-----------------------------------------------------------------------")
Debug.WriteLine("Machines that will change")
Debug.WriteLine(MachinesThatWillChange)
Debug.WriteLine("-----------------------------------------------------------------------")
Debug.WriteLine("Machines that will NOT change")
Debug.WriteLine(MachinesThatWillNotChange)
' Format and display the TimeSpan value.
Dim myelapsedTime As String = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Elapsed.Hours, ts.Elapsed.Minutes, ts.Elapsed.Seconds, ts.Elapsed.Milliseconds / 10)
Debug.WriteLine("RunTime " & myelapsedTime)
'EnumServers()
'GetSubnets("10.10.10.10")
'ListSubnetClients("10.10.10.10", "10.10.10.100")
'CompareFirewallRules()
'GetClientInfo("10.10.10.10", "10.10.10.100")
End Sub
Public Function GetSubnets(ByVal ServerIp As String) As String()
Dim StringsToReturn() As String
Dim ServerIpAddress = ServerIp
Dim DHCPResult As UInt32 = 0
Dim IPS As IntPtr
Dim nr As UInteger = 0
Dim Total As UInteger = 0
Dim resumehandle As UInteger = 0
DHCPResult = DhcpEnumSubnets(ServerIpAddress, resumehandle, 1000, IPS, nr, Total)
If DHCPResult = 0 Then
Dim iparray As DHCP_IP_ARRAY = CType(Marshal.PtrToStructure(IPS, GetType(DHCP_IP_ARRAY)), DHCP_IP_ARRAY)
Dim Size As Integer = iparray.NumElements
Dim outArray As IntPtr = iparray.Elements
Dim ipAddressesArray(Size) As DHCP_IP_ADDRESS
Array.Resize(StringsToReturn, Size + 1)
Dim current As IntPtr = outArray
For i = 0 To Size
ipAddressesArray(i) = New DHCP_IP_ADDRESS
ipAddressesArray(i) = CType(Marshal.PtrToStructure(current, GetType(DHCP_IP_ADDRESS)), DHCP_IP_ADDRESS)
Marshal.DestroyStructure(current, GetType(DHCP_IP_ADDRESS))
current = current + Marshal.SizeOf(ipAddressesArray(i))
Debug.WriteLine(i & " " & IPConvert(ipAddressesArray(i).IPAddress))
StringsToReturn(i) = IPConvert(ipAddressesArray(i).IPAddress)
Next
Marshal.FreeCoTaskMem(outArray)
Debug.WriteLine("Elements read " & nr & " out of " & Total)
Else
Debug.WriteLine("Failed!")
End If
Return StringsToReturn
End Function
Public Function getSubNetInfo(ByVal Subnet As Integer) As Integer
Dim Result As DHCP_SUBNET_INFO
Dim code As Integer
Try
code = DhcpGetSubnetInfo("10.10.10.10", Subnet, Result)
msgbox(Result.SubnetName)
Catch
msgbox(Err.Description)
End Try
End Function
Public Shared Function EnumServers() As DHCPDS_SERVER()
Dim retVal As UInt32 = 0
Dim servers As IntPtr
Try
DhcpEnumServers(0, Nothing, servers, Nothing, Nothing)
Catch ex As Exception
Throw New Exception("Error code: " & retVal.ToString, ex)
End Try
If retVal = 0 And servers <> IntPtr.Zero Then
Dim serverArray As DHCPDS_SERVERS = _
CType(Marshal.PtrToStructure(servers, GetType(DHCPDS_SERVERS)), DHCPDS_SERVERS)
Dim serverList(CType(serverArray.NumElements, Int32)) As DHCPDS_SERVER
Dim current As IntPtr = serverArray.Servers
For i As Int32 = 0 To CType(serverArray.NumElements - 1, Int32)
serverList(i) = CType(Marshal.PtrToStructure(current, GetType(DHCPDS_SERVER)), DHCPDS_SERVER)
Debug.WriteLine("ServerName: " & serverList(i).ServerName)
Debug.WriteLine("ServerAddress: " & serverList(i).ServerAddress)
Debug.WriteLine("ServerState: " & serverList(i).State)
Debug.WriteLine("ServerVersion: " & serverList(i).Version)
Debug.WriteLine("ServerDsLocation: " & serverList(i).DsLocation)
Debug.WriteLine("ServerDsLocType: " & serverList(i).DsLocType)
Debug.WriteLine("ServerFlags: " & serverList(i).Flags)
Debug.WriteLine(vbCrLf & vbCrLf)
Marshal.DestroyStructure(current, GetType(DHCPDS_SERVER))
current = IntPtr.op_Explicit(current.ToInt64() + Marshal.SizeOf(serverList(i)))
Next
Marshal.FreeCoTaskMem(servers)
Return serverList
ElseIf retVal = 0 And servers = IntPtr.Zero Then
Throw New Exception("No servers found.")
Else
Throw New Exception("Error code: " & retVal.ToString)
End If
End Function
Public Sub ListSubnetClients(ByVal ServerIP As String, ByVal SubnetIP As String)
Dim Client_Array As DHCP_CLIENT_INFO_ARRAY
Dim DHCP_Clients() As DHCP_CLIENT_INFO
' Why would you use int16 for a loop counter and for a pointer offset ?
Dim i, j As Int16
Dim pt As IntPtr
Dim Read_Clients, Total_Clients As Int32
Dim Error_Code As Int32
Dim Rem_Handle As IntPtr
Dim Scope_I As UInt32
'Scope_I = "10.0.3.0"
Scope_I = StringIPAddressToUInt32(SubnetIP) ' Dot2LongIP(SubnetIP)
'Call dhcpsapi
Error_Code = DhcpEnumSubnetClients(ServerIP, Scope_I, Rem_Handle, 65537, pt, Read_Clients, Total_Clients)
Client_Array = Marshal.PtrToStructure(pt, GetType(DHCP_CLIENT_INFO_ARRAY))
ReDim DHCP_Clients(Client_Array.NumElements - 1)
Dim MacAddr As Net.NetworkInformation.PhysicalAddress
For i = 0 To Client_Array.NumElements - 1
pt = Marshal.ReadIntPtr(Client_Array.Clients, j)
DHCP_Clients(i) = Marshal.PtrToStructure(pt, GetType(DHCP_CLIENT_INFO))
'MacAddr = Net.NetworkInformation.PhysicalAddress.Parse(DHCP_Clients(i).ClientHardwareAddress.Data)
'If HardwareAddress = "ec-30-91-d5-f0-a6" Then
'System.Diagnostics.Debugger.Break()
'ElseIf HardwareAddress.StartsWith("ec-30-91") Then
'System.Diagnostics.Debugger.Break()
'End If
Dim IsClientReserved As Boolean
If DHCP_Clients(i).ClientLeaseExpires.dwLowDateTime = 4294967295 And DHCP_Clients(i).ClientLeaseExpires.dwHighDateTime = 2147483647 Then
IsClientReserved = True
Else
IsClientReserved = False
End If
Dim IsClientInActivelyReserved As Boolean
If DHCP_Clients(i).ClientLeaseExpires.dwLowDateTime = 0 And DHCP_Clients(i).ClientLeaseExpires.dwHighDateTime = 0 Then
IsClientInActivelyReserved = True
Else
IsClientInActivelyReserved = False
End If
Dim HardwareAddress As String = String.Format("{0:x2}-{1:x2}-{2:x2}-{3:x2}-{4:x2}-{5:x2}", Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 1), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 2), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 3), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 4), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 5))
Dim NetShHardwareAddress As String = String.Format("{0:x2}{1:x2}{2:x2}{3:x2}{4:x2}{5:x2}", Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 1), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 2), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 3), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 4), Marshal.ReadByte(DHCP_Clients(i).ClientHardwareAddress.Data, 5))
Debug.WriteLine("ClientComment: " & DHCP_Clients(i).ClientComment)
Debug.WriteLine("ClientIpAddress: " & IPConvert(DHCP_Clients(i).ClientIpAddress))
Debug.WriteLine("ClientHardwareAddress: " & HardwareAddress)
Debug.WriteLine("ClientLeaseExpires: " & DHCP_Clients(i).ClientLeaseExpires.ConvertIntToDateTime)
Debug.WriteLine("ClientName: " & DHCP_Clients(i).ClientName)
Debug.WriteLine("OwnerHoost->HostName: " & DHCP_Clients(i).OwnerHost.HostName)
Debug.WriteLine("OwnerHost->IpAddress: " & IPConvert(DHCP_Clients(i).OwnerHost.IpAddress))
Debug.WriteLine("OwnerHost->NetBiosName: " & DHCP_Clients(i).OwnerHost.NetBiosName)
Debug.WriteLine("SubnetMask: " & UInt32IPAddressToString(DHCP_Clients(i).SubnetMask))
'ConvertTolease
'IPConvert(DHCP_Clients(i).ClientIpAddress).ToString.Trim = "10.246.36.101" And
If (Not IsClientReserved And Not IsClientInActivelyReserved) Then
Dim MyArgs As String = vbNullString
If Not IsNothing(DHCP_Clients(i).ClientComment) Then
Select Case DHCP_Clients(i).ClientComment.Trim
Case ""
MyArgs = "dhcp server 10.10.10.10 Scope " & SubnetIP.ToString.Trim & " Add reservedip " & IPConvert(DHCP_Clients(i).ClientIpAddress).ToString.Trim & " " & NetShHardwareAddress.ToString & " """ & DHCP_Clients(i).ClientName & """ ""Set for InfoBlox"" DHCP"
Case "This address is already in use"
HowManyClientsHaveBadAddresses += 1
Case Else
MyArgs = "dhcp server 10.10.10.10 Scope " & SubnetIP.ToString.Trim & " Add reservedip " & IPConvert(DHCP_Clients(i).ClientIpAddress).ToString.Trim & " " & NetShHardwareAddress.ToString & " """ & DHCP_Clients(i).ClientName & """ """ & DHCP_Clients(i).ClientComment.ToString.Trim & """ DHCP"
End Select
Else
MyArgs = "dhcp server 10.10.10.10 Scope " & SubnetIP.ToString.Trim & " Add reservedip " & IPConvert(DHCP_Clients(i).ClientIpAddress).ToString.Trim & " " & NetShHardwareAddress.ToString & " """ & DHCP_Clients(i).ClientName & """ ""Set for InfoBlox"" DHCP"
End If
If MyArgs IsNot Nothing Then
Debug.WriteLine("netsh " & MyArgs)
Dim MyProcess As New Process
MyProcess = Process.Start("netsh", MyArgs)
MyProcess.WaitForExit()
MachinesThatWillChange &= DHCP_Clients(i).ClientName & "," & IPConvert(DHCP_Clients(i).ClientIpAddress) & "," & NetShHardwareAddress & vbCrLf
HowManyClientsAreNeedToBechanged += 1
Else
MachinesThatWillNotChange &= DHCP_Clients(i).ClientName & "," & IPConvert(DHCP_Clients(i).ClientIpAddress) & "," & NetShHardwareAddress & "," & DHCP_Clients(i).ClientLeaseExpires.ConvertIntToDateTime & vbCrLf
Debug.WriteLine("This unit has a BAD Address - Skipping")
End If
Else
MachinesThatWillNotChange &= DHCP_Clients(i).ClientName & "," & IPConvert(DHCP_Clients(i).ClientIpAddress) & "," & NetShHardwareAddress & "," & DHCP_Clients(i).ClientLeaseExpires.ConvertIntToDateTime & vbCrLf
Debug.WriteLine("No NETSH command required")
HowManyClientsAreAlreadyReserved += 1
End If
Debug.WriteLine(vbCrLf & vbCrLf)
pt = IntPtr.Zero
j = j + 4
HowManyClients += 1
Next i
End Sub
Private Sub ConvertTolease(ByVal DHCP_Clients() As DHCP_CLIENT_INFO, ByVal I As Integer)
If IPConvert(DHCP_Clients(i).ClientIpAddress).ToString.Trim = "10.10.10.10" And False Then
Dim DHCPv4 As New DHCP_CLIENT_INFOV4
DHCPv4.bClientType = DHCP_CLIENT_TYPE.CLIENT_TYPE_BOTH
DHCPv4.ClientComment = DHCP_Clients(i).ClientComment
DHCPv4.ClientHardwareAddress = DHCP_Clients(i).ClientHardwareAddress
DHCPv4.ClientIpAddress = DHCP_Clients(i).ClientIpAddress
DHCPv4.ClientLeaseExpires = DHCP_Clients(i).ClientLeaseExpires
DHCPv4.ClientName = DHCP_Clients(i).ClientName
DHCPv4.OwnerHost = DHCP_Clients(i).OwnerHost
DHCPv4.SubnetMask = DHCP_Clients(i).SubnetMask
'Dim MyPtrr As IntPtr = Marshal.AllocHGlobal(Marshal.SizeOf(New DHCP_CLIENT_INFOV4))
'DHCPv4.ClientLeaseExpires.SetToReserved()
'DHCPv4.ClientLeaseExpires.SetToInfinte()
'Marshal.StructureToPtr(DHCPv4, MyPtrr, False)
'Debug.WriteLine("Lease Updated: " & DhcpSetClientInfo(ServerIP, MyPtrr))
'Debug.WriteLine("Lease Updated: " & DhcpSetClientInfoV4(ServerIP, MyPtrr))
End If
End Sub
''' <summary>
'''
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
''' <remarks></remarks>
'''
Public Structure DHCP_SEARCH_INFO
Dim DHCPSearchInfoType As Integer
Dim DHCPIPAddress As UInt32
End Structure
Private Enum DHCP_SEARCH_INFO_TYPE
DhcpClientIpAddress
DhcpClientHardwareAddress
DhcpClientName
End Enum
Public Function GetClientInfo(ByVal serverIP As String, ByVal clientIP As String)
Dim DHCPResult As UInt32 = 0
Try
Dim searchInfo As New DHCP_SEARCH_INFO
Dim searchInfoType As DHCP_SEARCH_INFO_TYPE = DHCP_SEARCH_INFO_TYPE.DhcpClientIpAddress
searchInfo.DHCPSearchInfoType = searchInfoType
searchInfo.DHCPIPAddress = Dot2LongIP(clientIP)
Dim hClientInfo As IntPtr
DHCPResult = DhcpGetClientInfo(serverIP, searchInfo, hClientInfo)
If DHCPResult = 0 And Not hClientInfo = IntPtr.Zero Then
Dim clientInfo As DHCP_CLIENT_INFO = Marshal.PtrToStructure(hClientInfo, GetType(DHCP_CLIENT_INFO))
Debug.WriteLine("ClientInfo->clientInfo.ClientHardwareAddress " & String.Format("{0:x2}-{1:x2}-{2:x2}-{3:x2}-{4:x2}-{5:x2}", Marshal.ReadByte(clientInfo.ClientHardwareAddress.Data), Marshal.ReadByte(clientInfo.ClientHardwareAddress.Data, 1), Marshal.ReadByte(clientInfo.ClientHardwareAddress.Data, 2), Marshal.ReadByte(clientInfo.ClientHardwareAddress.Data, 3), Marshal.ReadByte(clientInfo.ClientHardwareAddress.Data, 4), Marshal.ReadByte(clientInfo.ClientHardwareAddress.Data, 5)))
Debug.WriteLine("ClientInfo->clientInfo.ClientIpAddress " & IPConvert(clientInfo.ClientIpAddress))
Debug.WriteLine("ClientInfo->clientInfo.ClientLeaseExpires " & clientInfo.ClientLeaseExpires.ConvertIntToDateTime)
Debug.WriteLine("ClientInfo->clientInfo.ClientName " & clientInfo.ClientName)
Debug.WriteLine("ClientInfo->clientInfo.OwnerHost->HostName " & clientInfo.OwnerHost.HostName)
Debug.WriteLine("ClientInfo->clientInfo.OwnerHost->IpAddress " & IPConvert(clientInfo.OwnerHost.IpAddress))
Debug.WriteLine("ClientInfo->clientInfo.OwnerHost->NetBiosName " & clientInfo.OwnerHost.NetBiosName)
Debug.WriteLine("ClientInfo->clientInfo.SubnetMask " & clientInfo.SubnetMask)
Debug.WriteLine("ClientInfo->clientInfo.ClientComment " & clientInfo.ClientComment)
Return (clientInfo)
End If
Return Nothing
Catch ex As Exception
Console.WriteLine(ex.Message)
Return Nothing
End Try
End Function
Private Sub EnumAll()
Dim ListOfSubnets As String() = GetSubnets(ServerIPAddress)
For Each Subnet As String In ListOfSubnets
If Subnet = "0.0.0.0" Then
Exit Sub
End If
If Subnet = "10.246.10.0" Or True Then
ListSubnetClients(ServerIPAddress, Subnet)
End If
Next
End Sub
Public Sub CompareFirewallRules()
Dim FileContents = GetFileContents("\\fileshare1\ISStaff\Network\KDB\Config\EMC-ASA.txt")
Dim h As System.Net.IPHostEntry = System.Net.Dns.GetHostByName(System.Net.Dns.GetHostName)
For Each IPString As System.Net.IPAddress In h.AddressList
'Debug.WriteLine(IPString.ToString)
If InStr(FileContents, IPString.ToString) > 0 Then
'Debug.WriteLine(IPString.ToString & " - IP Found in Firewall Rules")
TextBox1.Text += IPString.ToString & " - IP Found in Firewall Rules"
End If
Next
If TextBox1.Text = vbNullString Then TextBox1.Text = "No Firewall Rules Found!"
End Sub
Public Shared Function StringIPAddressToUInt32(ByVal ip_string As String) As UInteger
Dim IpA As Net.IPAddress = System.Net.IPAddress.Parse(ip_string)
Dim ip_bytes As Byte() = IpA.GetAddressBytes()
Dim ip_uint As UInteger = CUInt(ip_bytes(0)) << 24
ip_uint += CUInt(ip_bytes(1)) << 16
ip_uint += CUInt(ip_bytes(2)) << 8
ip_uint += CUInt(ip_bytes(3))
Return ip_uint
End Function
Public Shared Function UInt32IPAddressToString(ByVal ipAddress As UInteger) As String
Dim ipA As New Net.IPAddress(ipAddress)
Dim sIp As String() = ipA.ToString().Split("."c)
Return sIp(3) & "." & sIp(2) & "." & sIp(1) & "." & sIp(0)
End Function
Public Function Dot2LongIP(ByVal DottedIP As String) As Integer
Dim arrDec() As String
Dim i As Integer
Dim intResult As Integer
If DottedIP = "" Then
Dot2LongIP = 0
Else
arrDec = DottedIP.Split(".")
For i = arrDec.Length - 1 To 0 Step -1
intResult = intResult + ((Int(arrDec(i)) Mod 256) * Math.Pow(256, 3 - i))
Next
Dot2LongIP = intResult
End If
End Function
Public Function IPConvert(ByVal IPAddress As Object) As Object
Dim x As Integer
Dim Pos As Integer
Dim PrevPos As Integer
Dim Num As Integer
If IsNumeric(IPAddress) Then
IPConvert = "0.0.0.0"
For x = 1 To 4
Num = Int(IPAddress / 256 ^ (4 - x))
IPAddress = IPAddress - (Num * 256 ^ (4 - x))
If Num > 255 Then
IPConvert = "0.0.0.0"
Exit Function
End If
If x = 1 Then
IPConvert = Num
Else
IPConvert = IPConvert & "." & Num
End If
Next
ElseIf UBound(Split(IPAddress, ".")) = 3 Then
' On Error Resume Next
For x = 1 To 4
Pos = InStr(PrevPos + 1, IPAddress, ".", 1)
If x = 4 Then Pos = Len(IPAddress) + 1
Num = Int(Mid(IPAddress, PrevPos + 1, Pos - PrevPos - 1))
If Num > 255 Then
IPConvert = "0"
Exit Function
End If
PrevPos = Pos
IPConvert = ((Num Mod 256) * (256 ^ (4 - x))) + IPConvert
Next
End If
End Function
Public Function GetFileContents(ByVal FullPath As String, Optional ByRef ErrInfo As String = "") As String
Dim strContents As String
Dim objReader As System.IO.StreamReader
Try
objReader = New System.IO.StreamReader(FullPath)
strContents = objReader.ReadToEnd()
objReader.Close()
Return strContents
Catch Ex As Exception
ErrInfo = Ex.Message
End Try
End Function
End Class
