Telnet via PHP

Jeg lytter bare :-)

Jeg faldt over følgende:
http://alfalinux.sourceforge.net/pcom.php3

Måske noget du kunne bruge?!?

Nope - hvis du har kigget på den, vil du se den bruger exec() funktionalitet lokalt på maskinen - vi skal i en helt anden grøft :-)

List of telnet.inc
09/06/00 05:09

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<?php
/*
  Auth  :  Mike McWilliams <php@iometrics.com>
  Date  :  2/24/1998
  Desc  :  Simple telnet session (port 23) to talk to a
            specific ip address.  Designed to work with
            HP JetDirect Network Cards.  $hostname can
            be set as an IP address or a host name found
            in /etc/hosts. Keep in mind it is best to set
            $hostname with the $ip variable in printer.php3
            script file.

  Also  :  see printer.php3 (it calls this script)

  Updates:
          2/24/98  Banner status can be changed
*/

class telnet_class
{
  var $banner;
  var $port=23;
  var $hostname= \"\";
  var $connection=0;
  var $state= \"DISCONNECTED\";

Function OpenConnection()
{
  if($this->hostname== \"\")
  return( \"2 it was not specified a valid hostname\");
  $this->connection=fsockopen($this->hostname,$this->port);
 
  switch($this->connection)
  {
  case 0:
    echo  \"File not opened\";
    return( \"<BR><BR>File not created<BR>\".$this->hostname. \" \".$this->port). \"<BR>\";
  case -3:
    return( \"-3 socket could not be created\");
  case -4:
    return( \"-4 dns lookup on hostname \\\"$hostname\\\" failed\");
  case -5:
    return( \"-5 connection refused or timed out\");
  case -6:
    return( \"-6 fdopen() call failed\");
  case -7:
    return( \"-7 setvbuf() call failed\");
  default:
    return( \"\");
  }
}           

Function GetLine()
{
  for($line= \"\";;)
  {
  if(feof($this->connection))
    return(0);
  $line.=fgets($this->connection,100);
  $length=strlen($line);
  if($length>=2
  && substr($line,$length-2,2)== \"\\r\\n\")
    return(substr($line,0,$length-2));
  }
}
 
Function PutLine($line)
{
  return(fputs($this->connection, \"$line\\r\\n\"));
}   

Function CloseConnection()
{
  if($this->connection!=0)
  {
  fclose($this->connection);
  $this->connection=0;
  }
}       

/* ___________ Public Functions ______________ */

Function Open()
{
    //OPEN CONNECTION TO HOST
  if(($error=$this->OpenConnection())!= \"\")
      return($error);

    //IF WE ARE CONNECTED, PERFORM COMMANDS
  if ($this->connection) {
      $this->PutLine( \"\\r\\n\");
      $this->PutLine( \"?\");
      $this->GetLine();

      if (isset($this->banner)){
        if (strval($this->banner)==0){
            $this->PutLine( \"BANNER:0\");
          } elseif (strval($this->banner)==1){
            $this->PutLine( \"BANNER:1\");
        }
      }

      //TELL HOST WE WISH TO QUIT
      $this->PutLine( \"quit\");

      //READ WHAT THE HOST SENT US
      $message=0;
      $i=0;
      $jetdirect =  \"JETDIRECT PARAMETERS CONFIGURED\";
      $quitmsg =  \"USER QUITTING\";

      //LOOP THROUGH LINES UNTIL EOF OR 40 LINES ARE PROCESSED
      while (!feof($this->connection) && ($i<40)) {
        $currentline=$this->GetLine();
        $bTripped=$bTripped || strstr(strtoupper($currentline),$jetdirect);
       
          //ONLY DISPLAY $jetdirect LINE AND BEYOND (do not show quit message)
        if (($bTripped) && (!strstr(strtoupper(chop($currentline)),$quitmsg))) {
            //SEE IF THIS LINE HAS THE BANNER STATUS
            if (strstr(strtoupper($currentline),  \"BANNER\")){

              //CREATE URL VARIABLES
              $banner= \"<A href=\\\"./printer.php3?ip=\".$this->hostname. \"&banner=\";
              $suffix= \"\\\">Click to Change</A>\";

              //SEE WHAT THE STATUS OF THE BANNER IS
              if (!strstr(strtoupper($currentline), \"ENABLED\")){
                  //BANNER IS DISABLE (see the ! above) MAKE URL FOR ENABLE
                  // AND ADD THE MESSAGE TO THE ARRAY
                $messages[$message]=strtoupper($currentline).$banner. \"1\".$suffix;
              } elseif (strstr(strtoupper($currentline), \"ENABLED\")){ 
                  //BANNER IS ENABLED - MAKE URL FOR DISABLE
                  // AND ADD THE MESSAGE TO THE ARRAY
                $messages[$message]=strtoupper($currentline).$banner. \"0\".$suffix;
              }
            } else {
                //ADD THE MESSAGE TO THE ARRAY
              $messages[$message]=strtoupper($currentline);
              $message++;
            }
        }
        $i++;
      }
    } else {
      $messages[0]= \"-ERROR\";
  }

    //CLOSE THE CONNECTION
  $this->CloseConnection();
  return($messages);
}           

Function Close()
{
  $this->CloseConnection();
  $this->state= \"DISCONNECTED\";
  return($error);
}             
};
?>



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Lækkert - det ser lovende ud .. vender tilbage, hvis det lykkes mig at tilpasse den til redhat\'en.

Hmmm kan ikke lige regne ud om det vil føre nogen vegne:

<?
include (\'telnet.inc.php3\');
$TF = new telnet_class;
$TF->hostname=\"localhost\";
$TF->Open();
?>

Går i stå, problemområdet er GetLine, hvor fgets aldrig returnerer:

  $line.=fgets($this->connection,100);
  $length=strlen($line);
  if($length>=2
  && substr($line,$length-2,2)== \"\\r\\n\")
    return(substr($line,0,$length-2));
  }

Jeg afviser svaret indtil videre, håber stadig på en testet version :-)

Jeg skylder at sige, at selve forbindelsen oprettes godt nok - men der er ingen kommunikation over den: /var/log/secure melder fint:

Sep  7 14:19:28 10 in.telnetd[8703]: connect from 127.0.0.1

Lukker spørgsmålet.

Har dog ingen løsning, så hvis én dukker op med en sådan, er point\'ene gerne givet ud stadigvæk.