Telnet可以帮助我们完成远程登录。其中实现它的代码形式并不固定,这里我们介绍的则是PHP Telnet程序。那么就让我们来一起看看具体的代码是如何编写的。那么具体的内容请大家浏览正文。
PHP Telnet程序
PHP代码:
- PHP code
- <?php
- /**
- * name:薛如飞
- * qq:6706250
- * e-mail:xuerufei@163.com
- * blog:[url=http://hi.baidu.com/]http://hi.baidu.com/[/url]飞云盖天
- * date:08.08.28
- **/
- if (isset($_POST['host']) and isset($_POST['user']))
- {
- $host= $_POST['host'];
- $user= $_POST['user'];
- $pass= $_POST['pass'];
- $cmd= stripslashes($_POST['cmd']);
- require_once "phpTelnet.php";
- $Telnet = new PHPTelnet();
- $Telnet->show_connect_error=0;
- $result = $Telnet->Connect($host,$user,$pass);
- switch ($result)
- {
- case 0:
- $Telnet->DoCommand($cmd, $result);
- echo $result;
- $Telnet->Disconnect();
- break;
- case 1:
- echo '[PHP Telnet] Connect failed: Unable to open network connection';
- break;
- case 2:
- echo '[PHP Telnet] Connect failed: Unknown host';
- break;
- case 3:
- echo '[PHP Telnet] Connect failed: Login failed';
- break;
- case 4:
- echo '[PHP Telnet] Connect failed: Your PHP version does not support PHP Telnet';
- break;
- }
- }
- else
- {
- ?>
- <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
- <form action="index.php" method="post" name="form0" id="form0">
- <p></p>
- <p align="center" >Telnet</p>
- <table width="200" border="0" align="center">
- <tr>
- <td width="81" height="18">host:</td>
- <td width="109"><input name="host" type="text" size="16" value="" /></td>
- </tr>
- <tr>
- <td width="81" height="18">user:</td>
- <td width="109"><input name="user" type="text" size="16" value="" /></td>
- </tr>
- <tr>
- <td width="81" height="18">pass:</td>
- <td width="109"><input name="pass" type="text" size="16" value="" /></td>
- </tr>
- <tr>
- <td width="81" height="18">cmd:</td>
- <td width="109">
- <textarea rows="6" name="cmd" cols="16"></textarea></td>
- </tr>
- <tr>
- <td> </td>
- <td><input type="submit" name="Submit" value="提交" /></td>
- </tr>
- </table>
- <p> </p>
- </form>
- <?php
- }
- ?>
- <?php
- /*
- PHP Telnet 1.1
- by Antone Roundy
- adapted from code found on the PHP website
- public domain
- */
- class PHP Telnet
- {
- 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\r");
- $this->Sleep();
- fputs($this->fp,"$pass\r");
- if ($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\r");
- $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,1000);
- $s=socket_get_status($this->fp);
- }
- while ($s['unread_bytes']);
- }
- function Sleep()
- {
- if ($this->use_usleep) usleep($this->sleeptime);
- else sleep(1);
- }
- function PHP Telnet()
- {
- $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 '<br />[PHP Telnet] <a href="[url=http://www.geckotribe.com/php-Telnet/errors/fsockopen.php]http://www.geckotribe.com/php-Telnet/errors/fsockopen.php">Connect[/url] failed: Unable to open network connection</a><br />'; break;
- case 2: echo '<br />[PHP Telnet] <a href="[url=http://www.geckotribe.com/php-Telnet/errors/unknown-host.php]http://www.geckotribe.com/php-Telnet/errors/unknown-host.php">Connect[/url] failed: Unknown host</a><br />'; break;
- case 3: echo '<br />[PHP Telnet] <a href="[url=http://www.geckotribe.com/php-Telnet/errors/login.php]http://www.geckotribe.com/php-Telnet/errors/login.php">Connect[/url] failed: Login failed</a><br />'; break;
- case 4: echo '<br />[PHP Telnet] <a href="[url=http://www.geckotribe.com/php-Telnet/errors/php-version.php]http://www.geckotribe.com/php-Telnet/errors/php-version.php">Connect[/url] failed: Your server\'s PHP version is too low for PHP Telnet</a><br />'; break;
- }
- }
- }
- ?>