FindUser Method

'Declaration
 
<DispIdAttribute(20)>
Function FindUser( _
   ByVal Username As String _
) As Integer

Public _result As Boolean = False
Public _serverAndClient As CaptureAndPlayCtrlForm = New CaptureAndPlayCtrlForm()
Private _captureCtrl As CaptureCtrl
Private _playCtrl As PlayCtrl
Private _pMux As LMNetMux
Private _pSink As LMNetSnk

Private Const _networkUrl As String = "ltsf://127.0.0.1:27015" ' network stream url
Private Const _networkAuthenticatedUrl As String = "ltsf://User1:P99999@127.0.0.1:27015" ' network stream url
Private Const TestMessage As String = "LEAD NETWORK"

Public Sub RequireLoginExample()
   ' reference the capture control
   _captureCtrl = _serverAndClient.CaptureCtrl

   ' reference the play control
   _playCtrl = _serverAndClient.PlayCtrl

   Try
      ' try to find a video camera
      If _captureCtrl.VideoDevices("Logitech") Is Nothing Then
         Throw New Exception("No Logitech video device available")
      End If

      _captureCtrl.VideoDevices("Logitech").Selected = True

      ' select a video compressor
      _captureCtrl.VideoCompressors.Mpeg4.Selected = True

      ' set the target output file
      _captureCtrl.TargetFormat = TargetFormatType.NET
      _captureCtrl.TargetFile = _networkUrl

      If _captureCtrl.IsModeAvailable(CaptureMode.Video) Then
         ' here we will only capture 15 seconds for this example.
         ' in a real application, you would not normally want to 
         ' set the time limit for capture.
         _captureCtrl.TimeLimit = 15
         _captureCtrl.UseTimeLimit = True

         ' enable preview
         _captureCtrl.Preview = True

         ' subscribe to the started event for this example
         ' we will connect a client after the capture starts
         AddHandler _captureCtrl.Started, AddressOf CaptureCtrl_Started

               ' subscribe to the media event for the player
         AddHandler _playCtrl.MediaEvent, AddressOf PlayCtrl_MediaEvent

         ' ready the capture graph in order to get the LNMetMux instance
         _captureCtrl.ReadyCapture(CaptureMode.Video)

         ' get the network multiplexer reference
         _pMux = TryCast(_captureCtrl.GetSubObject(CaptureObject.TargetFilter), LMNetMux)

         If Not _pMux Is Nothing Then
            ' set some mux settings
            _pMux.LiveSource = True
         End If

         ' get the network sink reference
         _pSink = TryCast(_captureCtrl.GetSubObject(CaptureObject.Sink), LMNetSnk)

         If Not _pSink Is Nothing Then
            ' set some mux settings
            _pSink.RequireLogin = True
            _pSink.UseEncryption = LMNetSnkLib.NetSnk_Encryption.NetSnk_Encryption_None

            ' clear all user registrations
            _pSink.RemoveAllUsers()

            ' setup up user logins
            AddModifyUsers()

            ' enumeration users
            EnumerateUsers()

            ' add a restriction
            AddRestriction()

            ' test timer for connection checking
            _serverAndClient.TestTimer.Interval = 10000
            _serverAndClient.TestTimer.Start()
            AddHandler _serverAndClient.TestTimer.Tick, AddressOf ConnectionChecker
         End If

         ' start capture
         _captureCtrl.StartCapture(CaptureMode.Video)

         ' we'll loop on the state and pump messages for this example.
         ' but you should not need to if running from a Windows Forms application.
         Do While _captureCtrl.State = CaptureState.Running OrElse _playCtrl.State = PlayState.Running
            Application.DoEvents()
         Loop

         ' release the mux and demux COM objects
         If Not _pMux Is Nothing Then
            Marshal.ReleaseComObject(_pMux)
         End If

         If Not _pSink Is Nothing Then
            Marshal.ReleaseComObject(_pSink)
         End If
      End If
   Catch ex As Exception
      _result = False
   End Try
End Sub

Private Sub AddModifyUsers()
   ' early out if we could not get the sink interface
   If _pSink Is Nothing Then
      Return
   End If

   ' get the current connection list version
   Dim oldVers As Integer = _pSink.ConnectionVersion

   ' add a user
   _pSink.AddUser("User1", "P12345")

   ' get the current connection list version
   Dim newVers As Integer = _pSink.ConnectionVersion

   ' add another user
   _pSink.AddUser("User2", "P67890")

   ' find a user
   Dim user1Id As Integer = _pSink.FindUser("User1")

   ' set user 1's password -- was set above in the AddUser call
   ' but we will change it here for demonstration purposes
   _pSink.SetPassword(user1Id, "P99999")

   ' remove User2 from the registered users list 
   Dim user2Id As Integer = _pSink.FindUser("User2")
   _pSink.RemoveUser(user2Id)
End Sub

Private Sub EnumerateUsers()
   ' get the current user count
   Dim userCount As Integer = _pSink.UserCount

   ' verify that we have two users now
   _result = (userCount = 1)

       ' demonstrate enumeration registered users
   Dim i As Integer = 0
   Do While i < userCount
      ' do something with user names and passwords
      Dim userName As String = _pSink.GetUsername(i)
      Dim passWord As String = _pSink.GetPassword(i)
      i += 1
   Loop

End Sub

Private Sub AddRestriction()
   ' add a restriction to the client which has the IP = 10.0.0.5
   ' this will not allow a connection from this address. 

   ' get number of restrictions
   Dim oldRestCount As Integer = _pSink.RestrictionCount

   ' Number of restrictions we have. 
   Dim restrictCount As Integer = _pSink.AddRestriction("10.0.0.5")

   ' get number of restrictions
   Dim newRestCount As Integer = _pSink.RestrictionCount

   ' verify that we have a new restriction count
   _result = _result And (oldRestCount <> newRestCount)

   ' enumeration restrictions (demonstration purposes)
   Dim i As Integer = 0
   Do While i < restrictCount
      Dim restAddress As String = _pSink.GetRestriction(i)
      ' do something with Restriction
      i += 1
   Loop

   ' find our restriction we added above
   Dim restriction As Integer = _pSink.FindRestriction("10.0.0.5")

   ' remove it
   _pSink.RemoveRestriction(restriction)

   ' remove all restrictions (demonstration purposes)
   _pSink.RemoveAllRestrictions()
End Sub

Private Sub CaptureCtrl_Started(ByVal sender As Object, ByVal e As EventArgs)
   StartClient()
End Sub

Private Sub StartClient()
   Try
      ' connect a client
      _playCtrl.SourceFile = _networkAuthenticatedUrl
   Catch ex As Exception
      _result = False
      Console.WriteLine("Player (Client) Exception: {0}", ex.Message)
   End Try
End Sub

Private Sub ConnectionChecker(ByVal sender As Object, ByVal e As EventArgs)
   _serverAndClient.TestTimer.Stop()

       ' get the number of users connected to the server
   Dim connCount As Integer = _pSink.ConnectionCount

   ' get the first connection (demonstration purposes)
   Dim pcon As ILMNetSnkConnection = _pSink.FindConnection(1)
   ' release it -- it is a COM object you know!
   Marshal.ReleaseComObject(pcon)

   ' get the first connection
   pcon = _pSink.FirstConnection

   ' check all connections with the server
   Do While Not pcon Is Nothing
      Dim pnext As ILMNetSnkConnection = pcon.NextConnection
      Dim id As Long = pcon.ID
      Dim userName As String = pcon.Username
      Dim connAddr As String = pcon.Address

           ' determine whether connection is enabled 
      ' it should be, we just enabled it above
      Dim enabled As Boolean = pcon.Enabled

      ' is it connected
      Dim connected As Boolean = pcon.Connected

           ' determine whether connection is disabled
      ' and disconnect it if so
      If enabled = False Then
         ' close this connection
         pcon.Close()
      End If
      Marshal.ReleaseComObject(pcon)
      pcon = pnext
   Loop

   ' close all connections (demonstration purposes)
   _pSink.CloseAll()

   _serverAndClient.TestTimer.Start()
End Sub

Private Sub PlayCtrl_MediaEvent(ByVal sender As Object, ByVal e As MediaEventArgs)
   If e.eventCode = MediaEventCode.EC_COMPLETE Then
      _result = _result And True
   End If
End Sub