the attached file implements a minimal telnet client and is
    free to use.

    re,
    tc

On Wed, Dec 19, 2001 at 02:16:36PM -0800, Chris Lee wrote:
> if I nc to my server on port 23 I get the same thing. ie there is nothing
> wrong. your going to have to emulate the telnet protocal now, thats just the
> connect string.
> 
> --
> 
>   Chris Lee
>   [EMAIL PROTECTED]
> 
> 
> 
> 
> "Kancha" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]...
> > The following code generated garbase output. what is wrong ??
> >
> > <?php
> >   $sp = fsockopen("localhost", 23);
> >   if(!$sp){
> >     echo "error";
> >     exit;
> >   }
> >   socket_set_blocking($sp, FALSE);
> >
> >   function getLine(){
> >     global $sp;
> >
> >     $op = fgets($sp, 1024);
> >     while(empty($op)){
> >       $op = fgets($sp, 1024);
> >     }
> >     return $op;
> >   }
> >
> >   echo getLine();
> > ?>
> >
> > The output was as follows:
> >
> > [root@ispms html]# php telnet.php
> > X-Powered-By: PHP/4.1.0
> > Content-type: text/html
> >
> > ? #'[root@ispms html]#
> >
> 
> 
> 
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> 
<?
error_reporting(-1);

class Telnet {
        // [EMAIL PROTECTED] 2001

        var $sock = NULL;

        function telnet($host,$port) {
        $this->sock = fsockopen($host,$port);
                socket_set_timeout($this->sock,2,0);
        }       

    function close() {
        if ($this->sock)
            fclose($this->sock);
        $this->sock = NULL;
        }

    function write($buffer) {
                $buffer = str_replace(chr(255),chr(255).chr(255),$buffer);
        fwrite($this->sock,$buffer); 
        }

        function getc() {
                return fgetc($this->sock);
        }

    function read_till($what)  {
        $buf = '';
                while (1) {
                        $IAC  = chr(255); 

                        $DONT = chr(254);
                        $DO   = chr(253);

                        $WONT = chr(252);
                        $WILL = chr(251);

                        $theNULL = chr(0);

                        $c = $this->getc();

                        if ($c === false) 
                          return $buf;

                        if ($c == $theNULL) {
                                continue;
                        }

                        if ($c == "\021") {
                                continue;
                        }

                        if ($c != $IAC) {
                                $buf .= $c;

                                if ($what == 
(substr($buf,strlen($buf)-strlen($what)))) {
                                        return $buf;
                                } else { 
                                        continue;
                                }
                        }

                        $c = $this->getc();

                        if ($c == $IAC) {
                                $buf .= $c;
                        } else if (($c == $DO) || ($c == $DONT)) {
                                $opt = $this->getc();
                        //      echo "we wont ".ord($opt)."\n";
                                fwrite($this->sock,$IAC.$WONT.$opt); 
                        } elseif (($c == $WILL) || ($c == $WONT)) {
                                $opt = $this->getc(); 
                        //      echo "we dont ".ord($opt)."\n";
                                fwrite($this->sock,$IAC.$DONT.$opt); 
                        } else {
                        //      echo "where are we? c=".ord($c)."\n";
                        }
                }

        }
}

$tn = new telnet("192.168.255.100",23);
echo $tn->read_till("ogin: ");
$tn->write("admin\r\n");
echo $tn->read_till("word: ");
$tn->write("thieso\r\n");
echo $tn->read_till(":> ");
$tn->write("ps\r\n");
echo $tn->read_till(":> ");
echo $tn->close();
?>

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