From 6a03cfd95288c37740964681e8e204a075ad4dca Mon Sep 17 00:00:00 2001
From: Tal Aloni <tal.aloni.il@gmail.com>
Date: Sat, 23 Sep 2017 13:30:26 +0300
Subject: [PATCH] Client: Throw Exception if attemping to logoff when the
 client is not connected

---
 SMBLibrary/Client/SMB1Client.cs | 5 +++++
 SMBLibrary/Client/SMB2Client.cs | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/SMBLibrary/Client/SMB1Client.cs b/SMBLibrary/Client/SMB1Client.cs
index 01b34c5..12ceffd 100644
--- a/SMBLibrary/Client/SMB1Client.cs
+++ b/SMBLibrary/Client/SMB1Client.cs
@@ -236,6 +236,11 @@ namespace SMBLibrary.Client
 
         public NTStatus Logoff()
         {
+            if (!m_isConnected)
+            {
+                throw new InvalidOperationException("A login session must be successfully established before attempting logoff");
+            }
+
             LogoffAndXRequest request = new LogoffAndXRequest();
             TrySendMessage(request);
 
diff --git a/SMBLibrary/Client/SMB2Client.cs b/SMBLibrary/Client/SMB2Client.cs
index 0031408..9fc83df 100644
--- a/SMBLibrary/Client/SMB2Client.cs
+++ b/SMBLibrary/Client/SMB2Client.cs
@@ -162,6 +162,11 @@ namespace SMBLibrary.Client
 
         public NTStatus Logoff()
         {
+            if (!m_isConnected)
+            {
+                throw new InvalidOperationException("A login session must be successfully established before attempting logoff");
+            }
+
             LogoffRequest request = new LogoffRequest();
             TrySendCommand(request);