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IsIsclQueueEmpty Method

Summary

Determines whether the ISCL transmission queue is empty.

Syntax

C++

public bool IsIsclQueueEmpty()

Public Function IsIsclQueueEmpty() As Boolean

public: 
bool IsIsclQueueEmpty();

Return Value

true if the ISCL transmission queue is empty; otherwise, false.

Remarks

The ISCL messages are added to the ISCL transmission queue, and will be sent in order on the network. Every object has its own ISCL transmission queue. The ISCL transmission queue contains requests to send data, to send non-secure data and the requests for closing the connection. Closing the connection does not start until all send requests are processed.

Example

This is a comprehensive sample that shows how to use DICOM Secure communication using ISCL.

using Leadtools; 
using Leadtools.Dicom; 
 
[StructLayout(LayoutKind.Sequential)] 
public struct MSG 
{ 
   public IntPtr hwnd; 
   public uint message; 
   public IntPtr wParam; 
   public IntPtr lParam; 
   public uint time; 
   public System.Drawing.Point p; 
} 
 
public enum WaitReturn 
{ 
   Complete, 
   Timeout, 
} 
 
class Utils 
{ 
   [DllImport("user32.dll")] 
   [return: MarshalAs(UnmanagedType.Bool)] 
   static extern bool PeekMessage(out MSG lpMsg, IntPtr hWnd, 
                                  uint wMsgFilterMin, uint wMsgFilterMax, 
                                  uint wRemoveMsg); 
 
   [DllImport("user32.dll")] 
   static extern bool TranslateMessage([In] ref MSG lpMsg); 
   [DllImport("user32.dll")] 
   static extern IntPtr DispatchMessage([In] ref MSG lpmsg); 
 
   const uint PM_REMOVE = 1; 
 
   public static WaitReturn WaitForComplete(double mill, WaitHandle wh) 
   { 
      TimeSpan goal = new TimeSpan(DateTime.Now.AddMilliseconds(mill).Ticks); 
 
      do 
      { 
         MSG msg = new MSG(); 
 
         if (PeekMessage(out msg, IntPtr.Zero, 0, 0, PM_REMOVE)) 
         { 
            TranslateMessage(ref msg); 
            DispatchMessage(ref msg); 
         } 
 
         if (wh.WaitOne(new TimeSpan(0, 0, 0), false)) 
         { 
            return WaitReturn.Complete; 
         } 
 
         if (goal.CompareTo(new TimeSpan(DateTime.Now.Ticks)) < 0) 
         { 
            return WaitReturn.Timeout; 
         } 
 
      } while (true); 
   } 
} 
 
// 
// Secure client (ISCL) 
// 
public class Client : DicomNet 
{ 
   AutoResetEvent waitEvent = new AutoResetEvent(false); 
 
   public Client() 
       : base(null, DicomNetSecurityeMode.Iscl) 
   { 
      string authData = "LEAD client ISCL"; 
 
      SetIsclMutualAuthenticationAlgorithm(DicomIsclMutualAuthenticationMode.ThreePFourW); 
      SetIsclMutualAuthenticationKey(1, 11619789628100321); 
      SetIsclMutualAuthenticationKey(2, 34217865672122111); 
      SetIsclMutualAuthenticationKey(3, 1605935625518899689); 
      SetIsclMutualAuthenticationKey(4, 138217077775855676); 
      SetIsclMutualAuthenticationKey(5, 9117318694593010212); 
      SetIsclMutualAuthenticationKey(6, 3485297985488245687); 
      SetIsclMutualAuthenticationKey(7, 1533287511573403981); 
      SetIsclMutualAuthenticationKey(8, 5604839976916070822); 
 
      SetIsclDefaultEncryptionMode(DicomIsclEncryptionMethodType.DesCbc); 
      SetIsclDefaultSigningMode(DicomIsclSigningMethodType.Md5); 
      SetIsclEncryptionKey(1, 8079278526052745737); 
      SetIsclEncryptionKey(2, 1312864321990916052); 
      SetIsclEncryptionKey(3, 7190959962252002117); 
      SetIsclEncryptionKey(4, 3619524191167482890); 
      SetIsclEncryptionKey(5, 3466658849848898336); 
      SetIsclEncryptionKey(6, 8474124475946342520); 
      SetIsclEncryptionKey(7, 7725464453540259890); 
      SetIsclEncryptionKey(8, 4320705344832296668); 
 
      SetIsclIndexForMutualAuthentication(1); 
      SetIsclEncryptionKeyIndex(1); 
 
      SetIsclMaxMessageLength(1024000); 
      SetIsclMaxCommunicationBlockLength(8129); 
 
      byte[] data = new ASCIIEncoding().GetBytes(authData); 
 
      SetIsclAuthenticationData(data, data.GetLength(0)); 
   } 
 
   public bool Wait() 
   { 
      WaitReturn ret; 
 
      ret = Utils.WaitForComplete((2 * 60) * 1000, waitEvent); 
 
      return (ret == WaitReturn.Complete); 
   } 
 
   protected override void OnConnect(DicomExceptionCode error) 
   { 
      waitEvent.Set(); 
   } 
 
   protected override void OnSecureLinkReady(DicomExceptionCode error) 
   { 
      Console.WriteLine("Iscl Peer Encryption is               : {0}", GetIsclPeerEncryption()); 
      Console.WriteLine("Iscl Peer Mac                         : {0}", GetIsclPeerMac()); 
      Console.WriteLine("Iscl Communication Block Length is    : {0}", GetIsclCommunicationBlockLength()); 
      Console.WriteLine("Iscl Index For Encryption             : {0}", GetIsclIndexForEncryption()); 
      Console.WriteLine("Is Iscl Queue Empty                   : {0}", IsIsclQueueEmpty()); 
      Console.WriteLine("Iscl Index For Mutual Authentication  : {0}", GetIsclIndexForMutualAuthentication()); 
      Console.WriteLine("Iscl Status is                        : {0}", GetIsclStatus()); 
      //We can also call  GetIsclPeerAuthenticationData() to Get the Peer Authentication Data 
      waitEvent.Set(); 
   } 
 
   protected override bool GetChallengeIscl(ref long challenge, long parameter) 
   { 
      challenge = 0x0123456789ABCDE1; 
      return true; 
   } 
 
   protected override bool InternalAuthenticateIscl(long challenge, ref long response, long parameter) 
   { 
      response = challenge + 1; 
      return true; 
   } 
 
   protected override bool ExternalAuthenticateIscl(long challenge, long response, long parameter) 
   { 
      if (response == (challenge + 1)) 
         return true; 
 
      return false; 
   } 
}; 
 
// 
// Secure server client (ISCL) 
// 
public class ServerConnection : DicomNet 
{ 
   public ServerConnection() 
       : base(null, DicomNetSecurityeMode.Iscl) 
   { 
      string authData = "LEAD server ISCL"; 
 
      SetIsclMutualAuthenticationAlgorithm(DicomIsclMutualAuthenticationMode.ThreePFourW); 
      SetIsclMutualAuthenticationKey(1, 11619789628100321); 
      SetIsclMutualAuthenticationKey(2, 34217865672122111); 
      SetIsclMutualAuthenticationKey(3, 1605935625518899689); 
      SetIsclMutualAuthenticationKey(4, 138217077775855676); 
      SetIsclMutualAuthenticationKey(5, 9117318694593010212); 
      SetIsclMutualAuthenticationKey(6, 3485297985488245687); 
      SetIsclMutualAuthenticationKey(7, 1533287511573403981); 
      SetIsclMutualAuthenticationKey(8, 5604839976916070822); 
      SetIsclIndexForMutualAuthentication(1); 
 
      SetIsclDefaultEncryptionMode(DicomIsclEncryptionMethodType.DesCbc); 
      SetIsclDefaultSigningMode(DicomIsclSigningMethodType.Md5); 
      SetIsclEncryptionKey(1, 8079278526052745737); 
      SetIsclEncryptionKey(2, 1312864321990916052); 
      SetIsclEncryptionKey(3, 7190959962252002117); 
      SetIsclEncryptionKey(4, 3619524191167482890); 
      SetIsclEncryptionKey(5, 3466658849848898336); 
      SetIsclEncryptionKey(6, 8474124475946342520); 
      SetIsclEncryptionKey(7, 7725464453540259890); 
      SetIsclEncryptionKey(8, 4320705344832296668); 
      SetIsclEncryptionKeyIndex(1); 
 
      SetIsclMaxMessageLength(1024000); 
      SetIsclMaxCommunicationBlockLength(8129); 
 
      byte[] data = new ASCIIEncoding().GetBytes(authData); 
 
      SetIsclAuthenticationData(data, data.GetLength(0)); 
   } 
 
   protected override bool GetChallengeIscl(ref long challenge, long parameter) 
   { 
      challenge = 0x0123456789ABCDE1; 
      return true; 
   } 
 
   protected override bool InternalAuthenticateIscl(long challenge, ref long response, long parameter) 
   { 
      response = challenge + 1; 
      return true; 
   } 
 
   protected override bool ExternalAuthenticateIscl(long challenge, long response, long parameter) 
   { 
      if (response == challenge + 1) 
         return true; 
 
      return false; 
   } 
}; 
 
public class Server : DicomNet 
{ 
   public Server() 
       : base(null, DicomNetSecurityeMode.None) 
   { 
   } 
 
   protected override void OnAccept(DicomExceptionCode error) 
   { 
      ServerConnection client = new ServerConnection(); 
 
      Accept(client); 
   } 
} 
 
public void ISCLSecuritySample() 
{ 
   DicomEngine.Startup(); 
   DicomNet.Startup(); 
 
   using (Server server = new Server()) 
   { 
      using (Client client = new Client()) 
      { 
         server.Listen("127.0.0.1", 104, 1); // start server 
         client.Connect("", 1000, "127.0.0.1", 104); // connect to secure server 
         if (!client.Wait()) // wait for connection to finish 
         { 
            Debug.Fail("Connection timed out"); 
         } 
         Debug.Assert(client.IsConnected(), "Client not connected"); 
 
         // 
         // Wait for authenication 
         // 
         if (!client.Wait()) 
         { 
            Debug.Fail("Connection timed out waiting for authenication"); 
         } 
 
         // If secure link is established you can now do your regular 
         // dicom communications. 
 
         client.CloseForced(true); 
      } 
      server.CloseForced(true); 
   } 
 
   DicomEngine.Shutdown(); 
   DicomNet.Shutdown(); 
}

Imports Leadtools 
Imports Leadtools.Dicom 
 
<StructLayout(LayoutKind.Sequential)> 
Public Structure MSG 
   Public hwnd As IntPtr 
   Public message As UInteger 
   Public wParam As IntPtr 
   Public lParam As IntPtr 
   Public time As UInteger 
   Public p As System.Drawing.Point 
End Structure 
 
Public Enum WaitReturn 
   Complete 
   Timeout 
End Enum 
 
Private Class Utils 
   <DllImport("user32.dll")> 
   Shared Function PeekMessage(<System.Runtime.InteropServices.Out()> ByRef lpMsg As MSG, ByVal hWnd As IntPtr, ByVal wMsgFilterMin As UInteger, 
                                  ByVal wMsgFilterMax As UInteger, ByVal wRemoveMsg As UInteger) As <MarshalAs(UnmanagedType.Bool)> Boolean 
   End Function 
 
   <DllImport("user32.dll")> 
   Shared Function TranslateMessage(ByRef lpMsg As MSG) As Boolean 
   End Function 
   <DllImport("user32.dll")> 
   Shared Function DispatchMessage(ByRef lpmsg As MSG) As IntPtr 
   End Function 
 
   Private Const PM_REMOVE As UInteger = 1 
 
   Public Shared Function WaitForComplete(ByVal mill As Double, ByVal wh As WaitHandle) As WaitReturn 
      Dim goal As TimeSpan = New TimeSpan(DateTime.Now.AddMilliseconds(mill).Ticks) 
 
      Do 
         Dim msg As MSG = New MSG() 
 
         If PeekMessage(msg, IntPtr.Zero, 0, 0, PM_REMOVE) Then 
            TranslateMessage(msg) 
            DispatchMessage(msg) 
         End If 
 
         If wh.WaitOne(New TimeSpan(0, 0, 0), False) Then 
            Return WaitReturn.Complete 
         End If 
 
         If goal.CompareTo(New TimeSpan(DateTime.Now.Ticks)) < 0 Then 
            Return WaitReturn.Timeout 
         End If 
 
      Loop While True 
   End Function 
End Class 
 
' 
' Secure client (ISCL) 
' 
Public Class Client : Inherits DicomNet 
   Private waitEvent As AutoResetEvent = New AutoResetEvent(False) 
 
   Public Sub New() 
      MyBase.New(Nothing, DicomNetSecurityeMode.Iscl) 
      Dim authData As String = "LEAD client ISCL" 
 
      SetIsclMutualAuthenticationAlgorithm(DicomIsclMutualAuthenticationMode.ThreePFourW) 
      SetIsclMutualAuthenticationKey(1, 11619789628100321) 
      SetIsclMutualAuthenticationKey(2, 34217865672122111) 
      SetIsclMutualAuthenticationKey(3, 1605935625518899689) 
      SetIsclMutualAuthenticationKey(4, 138217077775855676) 
      SetIsclMutualAuthenticationKey(5, 9117318694593010212) 
      SetIsclMutualAuthenticationKey(6, 3485297985488245687) 
      SetIsclMutualAuthenticationKey(7, 1533287511573403981) 
      SetIsclMutualAuthenticationKey(8, 5604839976916070822) 
 
      SetIsclDefaultEncryptionMode(DicomIsclEncryptionMethodType.DesCbc) 
      SetIsclDefaultSigningMode(DicomIsclSigningMethodType.Md5) 
      SetIsclEncryptionKey(1, 8079278526052745737) 
      SetIsclEncryptionKey(2, 1312864321990916052) 
      SetIsclEncryptionKey(3, 7190959962252002117) 
      SetIsclEncryptionKey(4, 3619524191167482890) 
      SetIsclEncryptionKey(5, 3466658849848898336) 
      SetIsclEncryptionKey(6, 8474124475946342520) 
      SetIsclEncryptionKey(7, 7725464453540259890) 
      SetIsclEncryptionKey(8, 4320705344832296668) 
 
      SetIsclIndexForMutualAuthentication(1) 
      SetIsclEncryptionKeyIndex(1) 
      SetIsclMaxMessageLength(1024000) 
      SetIsclMaxCommunicationBlockLength(8129) 
 
 
      Dim data As Byte() = New ASCIIEncoding().GetBytes(authData) 
 
      SetIsclAuthenticationData(data, data.GetLength(0)) 
   End Sub 
 
   Public Function Wait() As Boolean 
      Dim ret As WaitReturn 
 
      ret = Utils.WaitForComplete((2 * 60) * 1000, waitEvent) 
 
      Return (ret = WaitReturn.Complete) 
   End Function 
 
   Protected Overrides Sub OnConnect(ByVal [error] As DicomExceptionCode) 
      waitEvent.Set() 
   End Sub 
 
   Protected Overrides Sub OnSecureLinkReady(ByVal [error] As DicomExceptionCode) 
      Console.WriteLine("Iscl Peer Encryption is               : {0}", GetIsclPeerEncryption()) 
      Console.WriteLine("Iscl Peer Mac                         : {0}", GetIsclPeerMac()) 
      Console.WriteLine("Iscl Communication Block Length is    : {0}", GetIsclCommunicationBlockLength()) 
      Console.WriteLine("Iscl Index For Encryption             : {0}", GetIsclIndexForEncryption()) 
      Console.WriteLine("Is Iscl Queue Empty                   : {0}", IsIsclQueueEmpty()) 
      Console.WriteLine("Iscl Index For Mutual Authentication  : {0}", GetIsclIndexForMutualAuthentication()) 
      Console.WriteLine("Iscl Status is                        : {0}", GetIsclStatus()) 
      'We can also call  GetIsclPeerAuthenticationData() to Get the Peer Authentication Data 
      waitEvent.Set() 
   End Sub 
 
   Protected Overrides Function GetChallengeIscl(ByRef challenge As Long, ByVal parameter As Long) As Boolean 
      challenge = &H123456789ABCDE1 
      Return True 
   End Function 
 
   Protected Overrides Function InternalAuthenticateIscl(ByVal challenge As Long, ByRef response As Long, ByVal parameter As Long) As Boolean 
      response = challenge + 1 
      Return True 
   End Function 
 
   Protected Overrides Function ExternalAuthenticateIscl(ByVal challenge As Long, ByVal response As Long, ByVal parameter As Long) As Boolean 
      If response = (challenge + 1) Then 
         Return True 
      End If 
 
      Return False 
   End Function 
End Class 
 
' 
' Secure server client (ISCL) 
' 
Public Class ServerConnection : Inherits DicomNet 
   Public Sub New() 
      MyBase.New(Nothing, DicomNetSecurityeMode.Iscl) 
      Dim authData As String = "LEAD server ISCL" 
 
      SetIsclMutualAuthenticationAlgorithm(DicomIsclMutualAuthenticationMode.ThreePFourW) 
      SetIsclMutualAuthenticationKey(1, 11619789628100321) 
      SetIsclMutualAuthenticationKey(2, 34217865672122111) 
      SetIsclMutualAuthenticationKey(3, 1605935625518899689) 
      SetIsclMutualAuthenticationKey(4, 138217077775855676) 
      SetIsclMutualAuthenticationKey(5, 9117318694593010212) 
      SetIsclMutualAuthenticationKey(6, 3485297985488245687) 
      SetIsclMutualAuthenticationKey(7, 1533287511573403981) 
      SetIsclMutualAuthenticationKey(8, 5604839976916070822) 
      SetIsclIndexForMutualAuthentication(1) 
 
      SetIsclDefaultEncryptionMode(DicomIsclEncryptionMethodType.DesCbc) 
      SetIsclDefaultSigningMode(DicomIsclSigningMethodType.Md5) 
      SetIsclEncryptionKey(1, 8079278526052745737) 
      SetIsclEncryptionKey(2, 1312864321990916052) 
      SetIsclEncryptionKey(3, 7190959962252002117) 
      SetIsclEncryptionKey(4, 3619524191167482890) 
      SetIsclEncryptionKey(5, 3466658849848898336) 
      SetIsclEncryptionKey(6, 8474124475946342520) 
      SetIsclEncryptionKey(7, 7725464453540259890) 
      SetIsclEncryptionKey(8, 4320705344832296668) 
      SetIsclEncryptionKeyIndex(1) 
 
      SetIsclMaxMessageLength(1024000) 
      SetIsclMaxCommunicationBlockLength(8129) 
 
      Dim data As Byte() = New ASCIIEncoding().GetBytes(authData) 
      SetIsclAuthenticationData(data, data.GetLength(0)) 
 
   End Sub 
 
   Protected Overrides Function GetChallengeIscl(ByRef challenge As Long, ByVal parameter As Long) As Boolean 
      challenge = &H123456789ABCDE1 
      Return True 
   End Function 
 
   Protected Overrides Function InternalAuthenticateIscl(ByVal challenge As Long, ByRef response As Long, ByVal parameter As Long) As Boolean 
      response = challenge + 1 
      Return True 
   End Function 
 
   Protected Overrides Function ExternalAuthenticateIscl(ByVal challenge As Long, ByVal response As Long, ByVal parameter As Long) As Boolean 
      If response = challenge + 1 Then 
         Return True 
      End If 
 
      Return False 
   End Function 
End Class 
 
Public Class Server : Inherits DicomNet 
   Public Sub New() 
      MyBase.New(Nothing, DicomNetSecurityeMode.None) 
   End Sub 
 
   Protected Overrides Sub OnAccept(ByVal [error] As DicomExceptionCode) 
      Dim client As ServerConnection = New ServerConnection() 
 
      Accept(client) 
   End Sub 
End Class 
 
 
<TestMethod> 
Public Sub ISCLSecuritySample() 
   DicomEngine.Startup() 
   DicomNet.Startup() 
 
   Using server As New Server() 
      Using client As New Client() 
         server.Listen("127.0.0.1", 104, 1) 
         ' start server 
         client.Connect("", 1000, "127.0.0.1", 104) 
         ' connect to secure server 
         If Not client.Wait() Then 
            ' wait for connection to finish 
            Debug.Fail("Connection timed out") 
         End If 
         Debug.Assert(client.IsConnected(), "Client not connected") 
 
         ' 
         ' Wait for authenication 
         ' 
         If Not client.Wait() Then 
            Debug.Fail("Connection timed out waiting for authenication") 
         End If 
 
         ' If secure link is established you can now do your regular 
         ' dicom communications. 
 
         client.CloseForced(True) 
      End Using 
      server.CloseForced(True) 
   End Using 
 
   DicomEngine.Shutdown() 
   DicomNet.Shutdown() 
End Sub