php实现telnet功能示例

2020-03-22 18:03:08

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复制代码代码如下:
?php
html' target='_blank'>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 $i++) {
if (($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-
$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-
} 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 ' br / [PHP Telnet] a href="http://www.phpstudy.net/php-telnet/errors/fsockopen.php" Connect failed: Unable to open network connection /a br / break;
case 2: echo ' br / [PHP Telnet] a href="http://www.phpstudy.net/php-telnet/errors/unknown-host.php" Connect failed: Unknown host /a br / break;
case 3: echo ' br / [PHP Telnet] a href="http://www.phpstudy.net/php-telnet/errors/login.php" Connect failed: Login failed /a br / break;
case 4: echo ' br / [PHP Telnet] a href="http://www.phpstudy.net/php-telnet/errors/php-version.php" Connect failed: Your server/'s PHP version is too low for PHP Telnet /a br / break;
}
}
}

?
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