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| import org.apache.commons.net.telnet.*;
import java.io.*;
public class telnet
{
private TelnetClient telnet = new TelnetClient();
private InputStream in;
private PrintStream out;
private char prompt = '$';
public telnet( String server, String user, String password ) {
try {
// Connect to the specified server
telnet.connect( server, 23 );
// Get input and output stream references
in = telnet.getInputStream();
out = new PrintStream( telnet.getOutputStream() );
// Log the user on
readUntil( "login: " );
write( user );
readUntil( "Password: " );
write( password );
// Advance to a prompt
readUntil( prompt + " " );
}
catch( Exception e ) {
e.printStackTrace();
}
}
public void su( String password ) {
try {
write( "su" );
readUntil( "Password: " );
write( password );
prompt = '#';
readUntil( prompt + " " );
}
catch( Exception e ) {
e.printStackTrace();
}
}
public String readUntil( String pattern ) {
try {
char lastChar = pattern.charAt( pattern.length() - 1 );
StringBuffer sb = new StringBuffer();
boolean found = false;
char ch = ( char )in.read();
while( true ) {
System.out.print( ch );
sb.append( ch );
if( ch == lastChar ) {
if( sb.toString().endsWith( pattern ) ) {
return sb.toString();
}
}
ch = ( char )in.read();
}
}
catch( Exception e ) {
e.printStackTrace();
}
return null;
}
public void write( String value ) {
try {
out.println( value );
out.flush();
System.out.println( value );
}
catch( Exception e ) {
e.printStackTrace();
}
}
public String sendCommand( String command ) {
try {
write( command );
return readUntil( prompt + " " );
}
catch( Exception e ) {
e.printStackTrace();
}
return null;
}
public void disconnect() {
try {
telnet.disconnect();
}
catch( Exception e ) {
e.printStackTrace();
}
}
public static void main(String[] args) {
try {
telnet telnet = new telnet( "IP",
"user",
"admin" );
telnet.sendCommand( "ls" );
//telnet.su( "root-password" );
//telnet.sendCommand( "./restart.sh" );
telnet.disconnect();
}
catch( Exception e ) {
e.printStackTrace();
}
}
} |
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