Re: [PHP] Has anyone tried to make telnet client with php?

[Thies C. Arntzen]

On Thu, May 10, 2001 at 08:28:59PM -0700, Grishick wrote:
> Has anyone ever tried to make a telnet client with PHP? Any ideas how to
> make it?
> Tried to make it with socket, fsockopen, fputs, freads - does not work for
> telnet.
> Probably cURL will help?
> Deadly need an advice.
> Thanks.
> Grishick.
> [EMAIL PROTECTED]

    the attached code was written in a hurry and does _no_ error
    checking - but it does work (for me).

<?
error_reporting(-1);

class Telnet {
        /* (c) [EMAIL PROTECTED] */

        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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