Telnet Program

Question

Hi all,
I am trying to write a very simple program to connect to another PC on port number 23 (TELNET). After I launch my program, I get the PC's login prompt, and my program tries to login as "root" and waits for the password prompt, however the program displays the letter "r" instead of "password prompt". I am not sure if the other PC receives the "root" as user name??????. Following is my coding any help is greatly appreciated in advance.
import java.io.*;
import java.net.*;
public class ListenCommands{
private static byte[] ba ;
private static boolean running = true;
private static int arraySize = 200;
public static void main (String args[]) {
ba = new byte[arraySize];
if (args.length < 1)
System.out.println(
"raidCommands usage: java raidCommands <IP addr> ");
return;
InetAddress mIP = null;
InetAddress IP = null;
Socket sock = null;
InputStream is = null;
OutputStream os = null;
String strCommand ;
boolean socketStatus = true;
try {
mIP = InetAddress.getByName(args[0]);
} catch(UnknownHostException e) {
System.out.println("InetAddress failure:\n\r" + e);
try{
IP = InetAddress.getLocalHost();
}catch(UnknownHostException e){
System.out.println("Can not obtain host IP Address:\r\n" + e);
try {
sock = new Socket(mIP, 23,IP,23);
//sock = new Socket(mIP, 30001);
} catch(Exception e) {
System.out.println("TCP raidCommands make socket:\n\r" + e);
try {
os = sock.getOutputStream();
} catch(IOException e) {
System.out.println("TCP raidCommands get output stream:\n\r" + e);
try {
is = sock.getInputStream();
} catch(IOException e) {
System.out.println("TCP raidCommands get input stream:\n\r" + e);
try{
while(is.available() == 0 )
System.out.println("Waiting for login prompt...");
Thread.sleep(1000);
}catch(IOException e){
}catch(InterruptedException f){
resetArray();
try {
is.read(ba);
} catch(IOException e) {
System.out.println("TCP raidCommands read:\n\r" + e);
System.out.println("sending root to Tini");
strCommand = "root\r\n";
System.out.println("Entered UserName...." + strCommand);
try{
os.write(strCommand.getBytes());
}catch(IOException e) {
System.out.println("Can not write to output stream\n" + e);
try{
while(is.available() == 0 )
System.out.println("Waiting for password Prompt...");
Thread.sleep(1000);
}catch(IOException e){
}catch(InterruptedException f){
resetArray();
try{
is.read(ba);
}catch(IOException e) {
System.out.println("TCP raidCommands read:\n\r" + e);
System.out.println("Recived from Other computer......" + new String(ba));
try{
sock.close();
}catch(IOException e){
System.out.println("IOException closing socket:\r\n:" + e);
} // End of main
public static void resetArray()
for ( int i =0; i < ba.length;i++)
ba =0;
Thanks,
Mehran

Answer 1

Thanks for your responces.Could some one tell me what is the tag ? and how I could use it? or perhaps give a direction on where to read about it?
Thanks again....