枚舉網絡會話

Question

我想從“計算機管理”->“共享文件夾”->“會話”選項卡中獲取有關已連接網絡用戶的數據到我的c＃應用程序中。 誰能指導我有關必須使用哪些名稱空間以及一些示例代碼的信息，以便從“計算機管理”->“共享文件夾”->“會話”選項卡中導入用戶名和IP地址？

問候

Answer 1

您需要NetSessionEnum ，它：

提供有關在服務器上建立的會話的信息。

當傳遞的級別為502時，它將返回以下數組：

...計算機的名稱； 用戶名； 在計算機上打開文件，管道和設備； 以及客戶端使用的傳輸的名稱。

幸運的是，pinvoke.net擁有必要的簽名甚至一些示例代碼。 這是功能齊全的示例：

public class Program {
    public void Main(string[] args) {
        IntPtr pSessionInfo;
        IntPtr pResumeHandle = IntPtr.Zero;
        UInt32 entriesRead, totalEntries;

        var netStatus = NativeMethods.NetSessionEnum(
            null, // local computer
            null, // client name
            null, // username
            502, // include all info
            out pSessionInfo, // pointer to SESSION_INFO_502[]
            NativeMethods.MAX_PREFERRED_LENGTH,
            out entriesRead,
            out totalEntries,
            ref pResumeHandle
        );

        try {
            if (netStatus != NativeMethods.NET_API_STATUS.NERR_Success) {
                throw new InvalidOperationException(netStatus.ToString());
            }
            Console.WriteLine("Read {0} of {1} entries", entriesRead, totalEntries);
            for (int i = 0; i < entriesRead; i++) {
                var pCurrentSessionInfo = new IntPtr(pSessionInfo.ToInt32() + (NativeMethods.SESSION_INFO_502.SIZE_OF * i));
                var s = (NativeMethods.SESSION_INFO_502)Marshal.PtrToStructure(pCurrentSessionInfo, typeof(NativeMethods.SESSION_INFO_502));
                Console.WriteLine(
                    "User: {0}, Computer: {1}, Type: {2}, # Open Files: {3}, Connected Time: {4}s, Idle Time: {5}s, Guest: {6}",
                    s.sesi502_username,
                    s.sesi502_cname,
                    s.sesi502_cltype_name,
                    s.sesi502_num_opens,
                    s.sesi502_time,
                    s.sesi502_idle_time,
                    s.sesi502_user_flags == NativeMethods.SESSION_INFO_502_USER_FLAGS.SESS_GUEST
                );
            }
        } finally {
            NativeMethods.NetApiBufferFree(pSessionInfo);
        }
    }
}

public sealed class NativeMethods {
    [DllImport("netapi32.dll", SetLastError=true)]
    public static extern NET_API_STATUS NetSessionEnum(
            string serverName,
            string uncClientName,
            string userName,
            UInt32 level,
            out IntPtr bufPtr,
            int prefMaxLen,
            out UInt32 entriesRead,
            out UInt32 totalEntries,
            ref IntPtr resume_handle
    );

    [DllImport("netapi32.dll")]
    public static extern uint NetApiBufferFree(IntPtr Buffer);

    public const int MAX_PREFERRED_LENGTH = -1;

    public enum NET_API_STATUS : uint {
        NERR_Success = 0,
        NERR_InvalidComputer = 2351,
        NERR_NotPrimary = 2226,
        NERR_SpeGroupOp = 2234,
        NERR_LastAdmin = 2452,
        NERR_BadPassword = 2203,
        NERR_PasswordTooShort = 2245,
        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
    }

    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
    public struct SESSION_INFO_502 {
        public static readonly int SIZE_OF = Marshal.SizeOf(typeof(SESSION_INFO_502));
        public string sesi502_cname;
        public string sesi502_username;
        public uint sesi502_num_opens;
        public uint sesi502_time;
        public uint sesi502_idle_time;
        public SESSION_INFO_502_USER_FLAGS sesi502_user_flags;
        public string sesi502_cltype_name;
        public string sesi502_transport;
    }

    public enum SESSION_INFO_502_USER_FLAGS : uint {
        SESS_GUEST = 1,
        SESS_NOENCRYPTION = 2
    }
}

Answer 2

您不想與“計算機管理”進行交互，您想要調用與之相同的功能並將中間人排除在外。

為了了解當前的網絡連接，您可能正在尋找WNetOpenEnum或NetConnectionEnum

我認為BCL中沒有為此提供.NET函數，您必須使用p / invoke或尋找第三方庫（或者我個人最喜歡的方法，使用C ++ / CLI編寫包裝器）