php來實現telnet的連線、傳遞命令、獲取返回值等功能

PHP

<?php
error_reporting(-1);
class Telnet {
var $sock = NULL;
 
function telnet($host,$port) {
 $this->sock = fsockopen($host,$port);
 socket_set_timeout($this->sock,1,0);
}
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 ($c == "1") {
   continue;
  }
  if ($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";
  }
 }
}
}
$telnet = new telnet("192.168.0.1",'8080');
#echo $telnet->read_till("password: ");
#$telnet->write("KONGXX\r\n");
#echo $telnet->read_till(":> ");
#$telnet->write("ls\r\n");
#echo $telnet->read_till(":> ");
echo $telnet->close();