Some Cisco IOS throws " 'System.ArgumentOutOfRangeException' in Renci.SshNet.dll" as soon as the enable password is sent. #66
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Basic Issue: Some Cisco IOS, in my case 3600 switch, throws an error just after the password is sent. I support 4 models today, 800, 3600, 1921 and 3600. Using the same code, all but the 3600 works. This is consistent across several 3600 models. From a layman's perspective, I think the issue is in the ShellStream area. Also, watching wireshark, I do not see the connection dropping (red [RST,ACK]).
Another point, if I send the wrong password or time out, either case the shell sends an error, the channel is not dropped.
Have tested previous version from NuGet, with pulling down the 2016.0.0 source. All examples are using the 2016.0.0 source.
I have included code and debug from both successful and unsuccessful attempts. They are the same to channel 3. In the unsuccessful example the error is thrown, in successful there is more channel dialog.
If I trap on the catch for the Session.MessageListener(), I get the following trace
at Renci.SshNet.Common.SshDataStream.ReadBytes(Int32 length) in C:\Renci.SshNet\Renci\Renci.SshNet\Common\SshDataStream.cs:line 223
at Renci.SshNet.Common.SshDataStream.ReadBinary() in C:\Renci.SshNet\Renci\Renci.SshNet\Common\SshDataStream.cs:line 105
at Renci.SshNet.Common.SshData.ReadBinary() in C:\Renci.SshNet\Renci\Renci.SshNet\Common\SshData.cs:line 278
at Renci.SshNet.Messages.Transport.IgnoreMessage.LoadData() in C:\Renci.SshNet\Renci\Renci.SshNet\Messages\Transport\IgnoreMessage.cs:line 61
at Renci.SshNet.Common.SshData.Load(Byte[] value, Int32 offset) in C:\Renci.SshNet\Renci\Renci.SshNet\Common\SshData.cs:line 126
at Renci.SshNet.Session.LoadMessage(Byte[] data, Int32 offset) in C:\Renci.SshNet\Renci\Renci.SshNet\Session.cs:line 1642
at Renci.SshNet.Session.ReceiveMessage() in C:\Renci.SshNet\Renci\Renci.SshNet\Session.cs:line 954
at Renci.SshNet.Session.MessageListener() in C:\Renci.SshNet\Renci\Renci.SshNet\Session.cs:line 1791
Lots of detail after this ............................................
Here is my hello world code ......
PasswordConnectionInfo connInfo = new PasswordConnectionInfo("x.x.x.2", "username", "password"); //store 1 switch (3600) //PasswordConnectionInfo connInfo = new PasswordConnectionInfo("x.x.x.1", "username", "password"); //store 1 router (800) //PasswordConnectionInfo connInfo = new PasswordConnectionInfo("x.x.x.2", "username", "password"); //store 286 switch (2960) //PasswordConnectionInfo connInfo = new PasswordConnectionInfo("x.x.x.1", "username", "password"); //store 286 router (1921) SshClient sshClient = new SshClient(connInfo); sshClient.Connect(); ShellStream tmpStream = sshClient.CreateShellStream("Cisco", 80, 24, 800, 600, 1024); StreamReader _reader = new StreamReader(tmpStream); StreamWriter _writer = new StreamWriter(tmpStream); _writer.AutoFlush = true; _writer.Write("en\r"); Thread.Sleep(1000); string tmp = _reader.ReadToEnd(); Console.WriteLine(tmp); Console.WriteLine(sshClient.IsConnected.ToString()); Console.WriteLine("Sending en pass\r\n"); _writer.Write("enPass\r"); Console.WriteLine("Sent en pass\r\n"); Console.WriteLine(sshClient.IsConnected.ToString()); Thread.Sleep(5000); Console.WriteLine(sshClient.IsConnected.ToString()); tmp = _reader.ReadToEnd(); Console.WriteLine(tmp);Seccessfull example
Unsuccessful example
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