Thread: ssh server throwing exception

hi im writing an ssh server and client im using apache mina as the ssh deamon and jsch for the client
but am getting a NumberFormatException on the server i think when transmitting the time from client to server but cant find the problem
server code:

  public static void setupSftpServer(){
        SshServer sshd = SshServer.setUpDefaultServer();
        sshd.setPort(2228);
        sshd.setKeyPairProvider(new SimpleGeneratorHostKeyProvider("hostkey.ser"));
 
        List<NamedFactory<UserAuth>> userAuthFactories = new ArrayList<NamedFactory<UserAuth>>();
        userAuthFactories.add(new UserAuthNone.Factory());
        sshd.setUserAuthFactories(userAuthFactories);
 
        sshd.setCommandFactory(new ScpCommandFactory());
 
        List<NamedFactory<Command>> namedFactoryList = new ArrayList<NamedFactory<Command>>();
        namedFactoryList.add(new SftpSubsystem.Factory());
        sshd.setSubsystemFactories(namedFactoryList);
 
        try {
            sshd.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

the client code

    public static void tfc(String[] arg){//args==>file1 user@remotehost:file2
 
        if(arg.length!=2){
            System.err.println("usage: java ScpTo file1 user@remotehost:file2");
            System.exit(-1);
        }
 
        FileInputStream fis=null;
        try{
 
            String lfile=arg[0];
            //System.out.println(lfile);
            String user=arg[1].substring(0, arg[1].indexOf('@'));
            //System.out.println(user);
            arg[1]=arg[1].substring(arg[1].indexOf('@')+1);
            String host=arg[1].substring(0, arg[1].indexOf(':'));
            // System.out.println(host);
            String rfile=arg[1].substring(arg[1].indexOf(':')+1);
            // System.out.println(rfile);
 
            JSch jsch1=new JSch();
            Session session;
 
            session = jsch1.getSession(user, host, 22);
            System.out.println(user+"  "+host);
 
            // username and password will be given via UserInfo interface.
            UserInfo ui=new KnownHosts.MyUserInfo();
            session.setUserInfo(ui);
            //set up aes
//session.setConfig("cipher.s2c", "aes128-cbc,3des-cbc,blowfish-cbc");
//session.setConfig("cipher.c2s", "aes128-cbc,3des-cbc,blowfish-cbc");
//session.setConfig("CheckCiphers", "aes128-cbc");
//done setting aes
            System.out.println("aaa");
            session.connect();//error here
            System.out.println("bbb");
            boolean ptimestamp = true;
 
            // exec 'scp -t rfile' remotely
            String command="scp " + (ptimestamp ? "-p" :"") +" -t "+rfile;
            Channel channel=session.openChannel("exec");
            ((ChannelExec)channel).setCommand(command);
 
            // get I/O streams for remote scp
            OutputStream out=channel.getOutputStream();
            InputStream in=channel.getInputStream();
 
            channel.connect();
 
            if(checkAck(in)!=0){
                System.exit(0);
            }
 
            File _lfile = new File(lfile);
 
            if(ptimestamp){
                command="T "+(_lfile.lastModified()/1000)+" 0";
                // The access time should be sent here,
                // but it is not accessible with JavaAPI ;-<
                command+=(" "+(_lfile.lastModified()/1000)+" 0\n");
                out.write(command.getBytes()); out.flush();
                if(checkAck(in)!=0){
                    System.exit(0);
                }
            }
 
            // send "C0644 filesize filename", where filename should not include '/'
            long filesize=_lfile.length();
            command="C0644 "+filesize+" ";
 
            if(lfile.lastIndexOf('/')>0){
                command+=lfile.substring(lfile.lastIndexOf('/')+1);
            }else{
                command+=lfile;
            }
            command+="\n";
            out.write(command.getBytes()); out.flush();
            if(checkAck(in)!=0){
                System.exit(0);
            }
 
            // send a content of lfile
            fis=new FileInputStream(lfile);
            byte[] buf=new byte[1024];
            while(true){
                int len=fis.read(buf, 0, buf.length);
                if(len<=0) break;
                out.write(buf, 0, len); //out.flush();
            }
            fis.close();
            fis=null;
            // send '\0'
            buf[0]=0; out.write(buf, 0, 1); out.flush();
            if(checkAck(in)!=0){
                System.exit(0);
            }
            out.close();
 
            channel.disconnect();
            session.disconnect();
 
            System.exit(0);
        }catch(JSchException ex1){
            ex1.printStackTrace();
               try{if(fis!=null){
                fis.close();
            }
            }catch(Exception ee){
                System.out.println("ft error");
            }
        } catch (IOException ex) {
            java.util.logging.Logger.getLogger(ScpTo.class.getName()).log(Level.SEVERE, null, ex);
               try{if(fis!=null){
                fis.close();
            }
            }catch(Exception ee){
                System.out.println("ft error");
            }
        }
 
 
    }//end main
 
    static int checkAck(InputStream in) throws IOException{
        int b=in.read();
        // b may be 0 for success,
        // 1 for error,
        // 2 for fatal error,
        // -1
        if(b==0) {
            return b;
        }
        if(b==-1) {
            return b;
        }
 
        if(b==1 || b==2){
            StringBuffer sb=new StringBuffer();
            int c;
            do {
                c=in.read();
                sb.append((char)c);
            }
            while(c!='\n');
            if(b==1){ // error
                System.out.print(sb.toString());
            }
            if(b==2){ // fatal error
                System.out.print(sb.toString());
            }
        }else if(b==0){
            System.out.println("file sent");
        }
        return b;
    }//end checkack
 
}//end class

the error from server (the client throws no errors)

Exception in thread "ScpCommand: scp -p -t /home/user/k" java.lang.NumberFormatException: For input string: ""
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Long.parseLong(Long.java:601)
	at java.lang.Long.parseLong(Long.java:631)
	at org.apache.sshd.common.scp.ScpHelper.parseTime(ScpHelper.java:420)
	at org.apache.sshd.common.scp.ScpHelper.receive(ScpHelper.java:98)
	at org.apache.sshd.server.command.ScpCommand.run(ScpCommand.java:140)
	at java.lang.Thread.run(Thread.java:745)

when i change port of client to 22 it sends it to my open ssh server and works fine but when i send it to apache mina i get this error anyone have any idea where its going wrong thanks

k but on in this part of code i am sending false data with T so why is it null on server?

if(ptimestamp){
                command="T "+(_lfile.lastModified()/1000)+" 0";
                // The access time should be sent here,
                // but it is not accessible with JavaAPI ;-<
                command+=(" "+(_lfile.lastModified()/1000)+" 0\n");
                out.write(command.getBytes()); out.flush();
                if(checkAck(in)!=0){
                    System.exit(0);
                }
            }

here is switch statement on server side it doesint seems possible to try catch and input false data there

 long[] time = null;
        for (;;)
        {
            String line;
            boolean isDir = false;
            int c = readAck(true);
            switch (c)
            {
                case -1:
                    return;
                case 'D':
                    isDir = true;
                case 'C':
                    line = ((char) c) + readLine();
                    log.debug("Received header: " + line);
                    break;
                case 'T':
                    line = ((char) c) + readLine();
                    log.debug("Received header: " + line);
                    time = parseTime(line);
                    ack();
                    continue;
                case 'E':
                    line = ((char) c) + readLine();
                    log.debug("Received header: " + line);
                    ack();
                    return;
                default:
                    //a real ack that has been acted upon already
                    continue;
            }

any ideas apart from edit source of librarys as i would probobly break em
also why does it work with open ssh

--- Update ---

k have working should be no space after Tswitch and time should be seperated with spaces not : well that only took about 10 hours lol so in case others have same problem

Calendar cal = Calendar.getInstance();
            cal.getTime();
            SimpleDateFormat sdf = new SimpleDateFormat("HH mm ss");
            String time= sdf.format(cal.getTime());
 
            if(ptimestamp){
                command="T"+time;//(_lfile.lastModified()/1000)+" 0";
                command+=(" "+(_lfile.lastModified()/1000)+" 0\n");               
                out.write(command.getBytes());              
                out.flush();
                if(checkAck(in)!=0){
                    System.exit(0);
                }
            }