php實現telnet功能示例

2024-05-04 23:22:41

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復制代碼代碼如下:

<?php
class PHPTelnet {
 var $show_connect_error=1;

 var $use_usleep=0; // change to 1 for faster execution
 // don't change to 1 on Windows servers unless you have PHP 5
 var $sleeptime=125000;
 var $loginsleeptime=1000000;

 var $fp=NULL;
 var $loginprompt;

 var $conn1;
 var $conn2;

 /*
 0 = success
 1 = couldn't open network connection
 2 = unknown host
 3 = login failed
 4 = PHP version too low
 */
 function Connect($server,$user,$pass) {
 $rv=0;
 $vers=explode('.',PHP_VERSION);
 $needvers=array(4,3,0);
 $j=count($vers);
 $k=count($needvers);
 if ($k<$j) $j=$k;
 for ($i=0;$i<$j;$i++) {
 if (($vers[$i]+0)>$needvers[$i]) break;
 if (($vers[$i]+0)<$needvers[$i]) {
 $this->ConnectError(4);
 return 4;
 }
 }

 $this->Disconnect();

 if (strlen($server)) {
 if (preg_match('/[^0-9.]/',$server)) {
 $ip=gethostbyname($server);
 if ($ip==$server) {
 $ip='';
 $rv=2;
 }
 } else $ip=$server;
 } else $ip='127.0.0.1';

 if (strlen($ip)) {
 if ($this->fp=fsockopen($ip,23)) {
 fputs($this->fp,$this->conn1);
 $this->Sleep();

 fputs($this->fp,$this->conn2);
 $this->Sleep();
 $this->GetResponse($r);
 $r=explode("/n",$r);
 $this->loginprompt=$r[count($r)-1];

 fputs($this->fp,"$user/n");
 $this->Sleep();

 fputs($this->fp,"$pass/n");
 if ($this->use_usleep) usleep($this->loginsleeptime);
 else sleep(1);
 $this->GetResponse($r);
 $r=explode("/n",$r);
 if (($r[count($r)-1]=='')||($this->loginprompt==$r[count($r)-1])) {
 $rv=3;
 $this->Disconnect();
 }
 } else $rv=1;
 }

 if ($rv) $this->ConnectError($rv);
 return $rv;
 }

 function Disconnect($exit=1) {
 if ($this->fp) {
 if ($exit) $this->DoCommand('exit',$junk);
 fclose($this->fp);
 $this->fp=NULL;
 }
 }

 function DoCommand($c,&$r) {
 if ($this->fp) {
 fputs($this->fp,"$c/n");
 $this->Sleep();
 $this->GetResponse($r);
 $r=preg_replace("/^.*?/n(.*)/n[^/n]*$/","$1",$r);
 }
 return $this->fp?1:0;
 }

 function GetResponse(&$r) {
 $r='';
 do {
 $r.=fread($this->fp, 1024);
 $s=socket_get_status($this->fp);
 } while ($s['unread_bytes']);
 }

 function Sleep() {
 if ($this->use_usleep) usleep($this->sleeptime);
 else sleep(1);
 }

 function PHPTelnet() {
 $this->conn1=chr(0xFF).chr(0xFB).chr(0x1F).chr(0xFF).chr(0xFB).
 chr(0x20).chr(0xFF).chr(0xFB).chr(0x18).chr(0xFF).chr(0xFB).
 chr(0x27).chr(0xFF).chr(0xFD).chr(0x01).chr(0xFF).chr(0xFB).
 chr(0x03).chr(0xFF).chr(0xFD).chr(0x03).chr(0xFF).chr(0xFC).
 chr(0x23).chr(0xFF).chr(0xFC).chr(0x24).chr(0xFF).chr(0xFA).
 chr(0x1F).chr(0x00).chr(0x50).chr(0x00).chr(0x18).chr(0xFF).
 chr(0xF0).chr(0xFF).chr(0xFA).chr(0x20).chr(0x00).chr(0x33).
 chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0x2C).chr(0x33).
 chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0xFF).chr(0xF0).
 chr(0xFF).chr(0xFA).chr(0x27).chr(0x00).chr(0xFF).chr(0xF0).
 chr(0xFF).chr(0xFA).chr(0x18).chr(0x00).chr(0x58).chr(0x54).
 chr(0x45).chr(0x52).chr(0x4D).chr(0xFF).chr(0xF0);
 $this->conn2=chr(0xFF).chr(0xFC).chr(0x01).chr(0xFF).chr(0xFC).
 chr(0x22).chr(0xFF).chr(0xFE).chr(0x05).chr(0xFF).chr(0xFC).chr(0x21);
 }

 function ConnectError($num) {
 if ($this->show_connect_error) switch ($num) {
 case 1: echo ' [PHP Telnet] <a href="http://www.49028c.com/php-telnet/errors/fsockopen.php">Connect failed: Unable to open network connection</a> '; break;
 case 2: echo ' [PHP Telnet] <a href="http://www.49028c.com/php-telnet/errors/unknown-host.php">Connect failed: Unknown host</a> '; break;
 case 3: echo ' [PHP Telnet] <a href="http://www.49028c.com/php-telnet/errors/login.php">Connect failed: Login failed</a> '; break;
 case 4: echo ' [PHP Telnet] <a href="http://www.49028c.com/php-telnet/errors/php-version.php">Connect failed: Your server/'s PHP version is too low for PHP Telnet</a> '; break;
 }
 }
}

?>