[Mono-bugs] [Bug 510852] New: FtpWebRequest crashes with out of range exception

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http://bugzilla.novell.com/show_bug.cgi?id=510852


           Summary: FtpWebRequest crashes with out of range exception
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.4.x
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: System
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: asl.pavel at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


Description of Problem:
FtpWebRequest crashes with out of range exeception:
Unhandled Exception: System.IndexOutOfRangeException: Array index is out of
range.
  at System.Net.FtpWebRequest.GetResponseStatus () [0x00000] 
  at System.Net.FtpWebRequest.Authenticate () [0x00000] 
  at System.Net.FtpWebRequest.OpenControlConnection () [0x00000] 
  at System.Net.FtpWebRequest.ProcessMethod () [0x00000] 
  at System.Net.FtpWebRequest.ProcessRequest () [0x00000]
I think problem in this snippet of code:
file: mcs/class/System/System.Net/FtpWebRequest.cs
string number: 1063
"
   if (response == null || response.Length < 3)
       return ServiceNotAvailable ();

   int code;
   if (!Int32.TryParse (response.Substring (0, 3), out code))
       return ServiceNotAvailable ();

   if (response [3] == '-'){
"
If server response with smth consisting only from 3 symbols, buth in the last
statement we try to access 4th symbol

Steps to reproduce the problem:
1. just connect to any server for example "bash$ nc -l -p 21"
2. and aswer with something like "220"

Actual Results:
OutOfRange Exception

Expected Results:
Invalid Response from server or smth like this


How often does this happen?
Always


Additional Information:
Example code:
using System.Net;
using System.IO;
using System;

class FtpSender {
    const int BSize = 4096;
    string HostName;
    public FtpSender(string host) {
        HostName = host;
    }
    public void Send(string localpath, string serverpath) {
        string ftp_path = "ftp://" + HostName + serverpath;
        FtpWebRequest ftp = (FtpWebRequest) FtpWebRequest.Create(ftp_path);
        ftp.Credentials = new NetworkCredential("anonymous", "anonymous");
        ftp.KeepAlive = true;
        ftp.UseBinary = true;
        ftp.Method = WebRequestMethods.Ftp.UploadFile;

        byte[] buffer = new byte[BSize];
        int count;

        using ( FileStream fs = File.OpenRead(localpath) ) {
            using ( Stream ftps = ftp.GetRequestStream() ) {
                while ( (count = fs.Read(buffer, 0, buffer.Length)) > 0 ) {
                    ftps.Write(buffer, 0, count);
                }
            }
        }
    }
}

class FtpSnederApp {
    public static void Main(){
        FtpSender fs = new FtpSender("192.168.1.10");
        fs.Send("ftp.cs", "/ftp.cs" );
    }
}

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