Do not consume request-specific data for SSH_MSG_GLOBAL_REQUEST

[kadje]

Hi guys,

I use latest version of SSH.NET (2016.0.0 beta3). I get the following message and stack flow when my application tries to disconnect from remote server:
System.NotSupportedException: Data longer than 2147483647 is not supported.
at Renci.SshNet.SubsystemSession.WaitOnHandle(WaitHandle waitHandle, TimeSpan operationTimeout)
at Renci.SshNet.Sftp.SftpSession.RequestReadDir(Byte[] handle)
at Renci.SshNet.SftpClient.InternalListDirectory(String path, Action1 listCallback) at Renci.SshNet.SftpClient.ListDirectory(String path, Action1 listCallback)
at DBAService.Logic.FileTransfer.DbaSftpClient.GetCdrAndTrfFiles()
at DBAService.Logic.FileTransfer.FileTransferSession.FileTransferTask() at Renci.SshNet.SubsystemSession.WaitOnHandle(WaitHandle waitHandle, TimeSpan operationTimeout)
at Renci.SshNet.Sftp.SftpSession.RequestReadDir(Byte[] handle)
at Renci.SshNet.SftpClient.InternalListDirectory(String path, Action1 listCallback) at Renci.SshNet.SftpClient.ListDirectory(String path, Action1 listCallback)
at DBAService.Logic.FileTransfer.DbaSftpClient.GetCdrAndTrfFiles()
at DBAService.Logic.FileTransfer.FileTransferSession.FileTransferTask()

Remote server contains txt files which size <5M

Alex.

[drieseng]

What SSH server (and version) are you connecting to ?
Would it be possible to temporarily grant me access to that server to allow me to troubleshoot this issue ?

[kadje]

Unfortunately, I cannot get you access to the server.
Server is 'SSH-2.0-Mocana SSH '

[drieseng]

I've contacted them to request to an evaluation version.
What .NET Framework are you targeting ?
Can I somehow send you a custom assembly that includes a little more tracing ?

[kadje]

.NET Framework 4.0

I can build your debug version on my workstation. Could you provide source code? Also you can send me custom assembly by e-mail

[kadje]

Note:
Early I used version 2014.4.6 and I got the following messages:

System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.Net.Sockets.Socket'.
at System.Net.Sockets.Socket.get_Available()
at Renci.SshNet.Session.IsSocketConnected(Boolean& isConnected)
at Renci.SshNet.Session.get_IsConnected()
at Renci.SshNet.Session.SendDisconnect(DisconnectReason reasonCode, String message)
at Renci.SshNet.Session.Disconnect(DisconnectReason reason, String message)
at Renci.SshNet.Session.Disconnect()
at Renci.SshNet.BaseClient.Disconnect()
at DBAService.Logic.FileTransfer.DbaSftpClient.CloseConnection() at System.Net.Sockets.Socket.get_Available()
at Renci.SshNet.Session.IsSocketConnected(Boolean& isConnected)
at Renci.SshNet.Session.get_IsConnected()
at Renci.SshNet.Session.SendDisconnect(DisconnectReason reasonCode, String message)
at Renci.SshNet.Session.Disconnect(DisconnectReason reason, String message)
at Renci.SshNet.Session.Disconnect()
at Renci.SshNet.BaseClient.Disconnect()
at DBAService.Logic.FileTransfer.DbaSftpClient.CloseConnection()

or

System.NullReferenceException: Object reference not set to an instance of an object.
at Renci.SshNet.Session.IsSocketConnected(Boolean& isConnected)
at Renci.SshNet.Session.get_IsConnected()
at Renci.SshNet.Session.SendDisconnect(DisconnectReason reasonCode, String message)
at Renci.SshNet.Session.Disconnect(DisconnectReason reason, String message)
at Renci.SshNet.Session.Disconnect()
at Renci.SshNet.BaseClient.Disconnect()
at DBAService.Logic.FileTransfer.DbaSftpClient.CloseConnection() at Renci.SshNet.Session.IsSocketConnected(Boolean& isConnected)
at Renci.SshNet.Session.get_IsConnected()
at Renci.SshNet.Session.SendDisconnect(DisconnectReason reasonCode, String message)
at Renci.SshNet.Session.Disconnect(DisconnectReason reason, String message)
at Renci.SshNet.Session.Disconnect()
at Renci.SshNet.BaseClient.Disconnect()
at DBAService.Logic.FileTransfer.DbaSftpClient.CloseConnection()

Do you have workaround for these exceptions? How I can corectly close connection to server?
Cause of exceptions has been resolved in new version. Is it right?
(END Note)

Do you need more info and what do you think issues #60, #59 and #58 are dependented?

[POC-Tools]

Hello,
I know this bug was closed, but is it fixed? Because I'm having a similar exception, but on StfClient.Connect().
I'm using Renci.SshNet version 2016.1.0.0 and .net version 4.6.1.

The exception I'm getting is:

System.NotSupportedException: Data longer than 2147483647 is not supported.
   at Renci.SshNet.Session.WaitOnHandle(WaitHandle waitHandle, TimeSpan timeout)
   at Renci.SshNet.Session.WaitOnHandle(WaitHandle waitHandle)
   at Renci.SshNet.Session.Connect()
   at Renci.SshNet.BaseClient.Connect()
   at ReportingService.Report.UploadFile(XDocument xdoc, String filename, String username, String host, AuthenticationMethod authenticationMethod) in C:\...\ReportingService\Report.cs:line 232
   at ReportingService.Report.SaveToFtp(XDocument xdoc, String filename) in C:\...\ReportingService\Report.cs:line 202
   at ReportingService.Report.<GenerateReport>d__1.MoveNext() in C:\...\ReportingService\Report.cs:line 112

Here's the code (I'm using PasswordAuthenticationMethod)

        private static void UploadFile(XDocument xdoc, string filename, string username, string host, AuthenticationMethod authenticationMethod)
        {
            var encoding = new UTF8Encoding(encoderShouldEmitUTF8Identifier: false, throwOnInvalidBytes: true);

            var con = new ConnectionInfo(host, username, authenticationMethod);
            con.Encoding = encoding;
            using (var ftpClient = new SftpClient(con))
            {
                ftpClient.Connect();

                using (var stream = new MemoryStream())
                {
                    using (var writer = XmlWriter.Create(stream, new XmlWriterSettings() { Encoding = encoding }))
                    {
                        xdoc.WriteTo(writer);
                        writer.Flush();
                        stream.Position = 0;
                        ftpClient.UploadFile(stream, filename, canOverride: true);
                    }
                }
                ftpClient.Disconnect();
            }
        }

[dparker61]

am getting this error
Data longer than 2147483647 is not supported.
during connection to a Tectia ssh server running on a mainframe. The exception gets thrown from this piece of code in IgnoreMessage.cs

'/// </summary>
protected override void LoadData()
{
    var dataLength = ReadUInt32();
    if (dataLength > int.MaxValue)
    {
        throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, "Data longer than {0} is not supported.", int.MaxValue));
    }'

I downloaded a zip of master, so think I am running the most recent.
My test program is connecting with just username/password.
I would appreciate any clues, or a pointer to the latest branch that has a fix. I'm new to this project and to coding around ssh, so entirely possible this is newbie pilot error.

Any help really appreciated!

Thank you!