If you need to drop users to certain resources on your computer, have a look at this example.
using Interop.NetAPI32;
namespace MySerie_Commons
{
public class ConnectionShare
{
public int id;
public int numLocks;
public string path;
public string username;
public ConnectionShare(int id, int numLocks, string path, string username)
{
this.id = id;
this.numLocks = numLocks;
this.path = path;
this.username = username;
}
public static List<ConnectionShare> BuildConnectionShareList()
{
List<ConnectionShare> list = new List<ConnectionShare>();
const int MAX_PREFERRED_LENGTH = -1;
int dwReadEntries;
int dwTotalEntries;
IntPtr pBuffer = IntPtr.Zero;
NetAPI.FILE_INFO_3 pCurrent = new NetAPI.FILE_INFO_3();
NetAPI.NET_API_STATUS dwStatus = NetAPI.NetFileEnum
(
"localhost",
null,
null,
3,
ref pBuffer,
MAX_PREFERRED_LENGTH,
out dwReadEntries,
out dwTotalEntries,
IntPtr.Zero
);
if (dwStatus == NetAPI.NET_API_STATUS.NERR_Success)
{
for (int dwIndex = 0; dwIndex < dwReadEntries; dwIndex++)
{
IntPtr iPtr = new IntPtr(pBuffer.ToInt32() + (dwIndex * Marshal.SizeOf(pCurrent)));
pCurrent = (NetAPI.FILE_INFO_3)Marshal.PtrToStructure(iPtr, typeof(NetAPI.FILE_INFO_3));
list.Add(new ConnectionShare(pCurrent.fi3_id, pCurrent.fi3_num_locks, pCurrent.fi3_pathname, pCurrent.fi3_username));
}
NetAPI.NetApiBufferFree(pBuffer);
}
return list;
}
}
}
and this class:
using System.Runtime.InteropServices;
namespace Interop.NetAPI32
{
public class NetAPI
{
public const int MAX_PREFERRED_LENGTH = -1;
public enum NET_API_STATUS:uint
{
NERR_Success = 0,
/// <summary>
/// This computer name is invalid.
/// </summary>
NERR_InvalidComputer = 2351,
/// <summary>
/// This operation is only allowed on the primary domain controller of the domain.
/// </summary>
NERR_NotPrimary = 2226,
/// <summary>
/// This operation is not allowed on this special group.
/// </summary>
NERR_SpeGroupOp = 2234,
/// <summary>
/// This operation is not allowed on the last administrative account.
/// </summary>
NERR_LastAdmin = 2452,
/// <summary>
/// The password parameter is invalid.
/// </summary>
NERR_BadPassword = 2203,
/// <summary>
/// The password does not meet the password policy requirements. Check the minimum password length, password complexity and password history requirements.
/// </summary>
NERR_PasswordTooShort = 2245,
/// <summary>
/// The user name could not be found.
/// </summary>
NERR_UserNotFound = 2221,
ERROR_ACCESS_DENIED = 5,
ERROR_NOT_ENOUGH_MEMORY = 8,
ERROR_INVALID_PARAMETER = 87,
ERROR_INVALID_NAME = 123,
ERROR_INVALID_LEVEL = 124,
ERROR_MORE_DATA = 234 ,
ERROR_SESSION_CREDENTIAL_CONFLICT = 1219
}
[DllImport("Netapi32.dll", SetLastError=true, CharSet=CharSet.Unicode)]
public static extern NET_API_STATUS NetFileEnum
(
string servername,
string basepath,
string username,
int level,
ref IntPtr bufptr,
int prefmaxlen,
out int entriesread,
out int totalentries,
IntPtr resume_handle
);
[DllImport("Netapi32.dll", SetLastError=true, CharSet = CharSet.Unicode)]
public static extern int NetFileClose(string servername, int id);
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct FILE_INFO_3
{
public int fi3_id;
public int fi3_permission;
public int fi3_num_locks;
[MarshalAs(UnmanagedType.LPWStr)]
public string fi3_pathname;
[MarshalAs(UnmanagedType.LPWStr)]
public string fi3_username;
}
[StructLayout( LayoutKind.Sequential )]
public struct SESSION_INFO_502
{
/// <summary>
/// Unicode string specifying the name of the computer that established the session.
/// </summary>
[MarshalAs(UnmanagedType.LPWStr)]
public string si502_cname;
/// <summary>
/// <value>Unicode string specifying the name of the user who established the session.</value>
/// </summary>
[MarshalAs(UnmanagedType.LPWStr)]
public string si502_username;
/// <summary>
/// <value>Specifies the number of files, devices, and pipes opened during the session.</value>
/// </summary>
public uint si502_num_opens;
/// <summary>
/// <value>Specifies the number of seconds the session has been active. </value>
/// </summary>
public uint si502_time;
/// <summary>
/// <value>Specifies the number of seconds the session has been idle.</value>
/// </summary>
public uint si502_idle_time;
/// <summary>
/// <value>Specifies a value that describes how the user established the session.</value>
/// </summary>
public uint si502_user_flags;
/// <summary>
/// <value>Unicode string that specifies the type of client that established the session.</value>
/// </summary>
[MarshalAs(UnmanagedType.LPWStr)]
public string si502_cltype_name;
/// <summary>
/// <value>Specifies the name of the transport that the client is using to communicate with the server.</value>
/// </summary>
[MarshalAs(UnmanagedType.LPWStr)]
public string si502_transport;
}
[DllImport("netapi32.dll", SetLastError=true)]
public static extern int NetSessionEnum
(
[In,MarshalAs(UnmanagedType.LPWStr)]
string ServerName,
[In,MarshalAs(UnmanagedType.LPWStr)]
string UncClientName,
[In,MarshalAs(UnmanagedType.LPWStr)]
string UserName,
Int32 Level,
out IntPtr bufptr,
int prefmaxlen,
ref Int32 entriesread,
ref Int32 totalentries,
ref Int32 resume_handle
);
[DllImport("Netapi32.dll", SetLastError=true)]
public static extern int NetApiBufferFree(IntPtr Buffer);
[DllImport("kernel32.dll", EntryPoint="GetLastError", CallingConvention=CallingConvention.StdCall, SetLastError=true)]
public static extern uint GetLastError(); //Recommended use:Marshal.GetLastWin32Error !!
[DllImport("kernel32.dll", CharSet=System.Runtime.InteropServices.CharSet.Auto)]
private static extern uint FormatMessage
(
uint dwFlags,
IntPtr lpSource,
uint dwMessageId,
uint dwLanguageId,
ref string lpBuffer,
uint nSize,
IntPtr Arguments
);
public static string GetErrorMessage(uint errorCode)
{
/*
Purpose: GetErrorMessage formats and returns an error message corresponding to the input errorCode.
See: http://pinvoke.net/default.aspx/kernel32.FormatMessage
*/
uint FORMAT_MESSAGE_ALLOCATE_BUFFER = 0×00000100;
uint FORMAT_MESSAGE_IGNORE_INSERTS = 0×00000200;
uint FORMAT_MESSAGE_FROM_SYSTEM = 0×00001000;
//uint FORMAT_MESSAGE_ARGUMENT_ARRAY = ????
uint messageSize = 255;
string lpMsgBuf = "";
uint dwFlags = FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS;
IntPtr ptrlpSource = IntPtr.Zero;
IntPtr prtArguments = IntPtr.Zero;
uint retVal = FormatMessage(dwFlags, ptrlpSource, errorCode, 0, ref lpMsgBuf, messageSize, prtArguments);
if (retVal == 0)
{
throw new Exception("Failed to format message for error code " + errorCode + ".");
}
return lpMsgBuf;
}
}
}
And the code for running a demo:
{
List<ConnectionShare> connections = ConnectionShare.BuildConnectionShareList();
IEnumerator myEnumerator = connections.GetEnumerator();
while (myEnumerator.MoveNext())
{
NetAPI.NetFileClose("localhost", ((ConnectionShare)myEnumerator.Current).id);
}
}
Thanks to Manfred Braun for helping me out with this problem.
