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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