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Filename : Service.php
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<?php

require_once('blowfish.php');

class Service
{

	private $cmd = null;
	public $cmdStatus = null;
	public $act = null;
	public $actId = null;
	public $FNAME = null;
	public $FSTATUS = null;
	public $FPID = null;
	public $serverLog = null;
	public $serverLastModTime = 100;
	public $listeners = [];
	public $adminL = [];
	public $vhosts = [];
	public $awstats = [];
	public $serv = [];
	public $license = [];
	public $debugOn = null;
	public $messages = [];

	public function __construct()
	{
		$this->FNAME = '/tmp/lshttpd/.admin';
		$this->FSTATUS = '/tmp/lshttpd/.status';
		$this->FPID = '/tmp/lshttpd/lshttpd.pid';
	}

	public function init()
	{
		clearstatcache();
		$this->serverLastModTime = filemtime($this->FSTATUS);
		$this->readStatus();
	}

	public function refreshConf($data)
	{
		$listeners = $data['listener'];
		foreach ($listeners as $lname => $addr) {
			if (!isset($this->listeners[$lname])) {
				$this->listeners[$lname] = [];
				$this->listeners[$lname]['addr'] = $addr;
				$this->listeners[$lname]['status'] = 'Error';
			}
		}

		$vhnames = $data['vhost'];
		// first char 0|1 (active|inactive), 2nd char A:in conf only, M: in both, S: in status only
		foreach ($vhnames as $vhname) {
			if (!isset($this->vhosts[$vhname])) {
				$this->vhosts[$vhname] = '0A';
			} else {
				$this->vhosts[$vhname] = substr($this->vhosts[$vhname], 0, 1) . 'M';
			}
		}

		$this->serv['name'] = $data['serv'];

		if (array_key_exists('awstats', $data)) {
			$this->awstats = $data['awstats'];
		} else {
			$this->awstats = null;
		}

		$fd = fopen($this->FPID, 'r');
		if ($fd) {
			$this->serv['pid'] = trim(fgets($fd));
			fclose($fd);
		}
		$this->serverLog = $data['servLog'];
	}

	public function process($act, $actId)
	{
		$this->act = $act;
		$this->actId = $actId;

		if ($act == 'RESET_ALL_PHP_PROCESSES') {
			$this->resetphp();
			return true;
		}

		if ($this->isPending()) {
			return false;
		}

		$this->checkLastMod();

		if (( $act == 'upgrade' ) ||
				( $act == 'switchTo' ) ||
				( $act == 'validatelicense' ) ||
				( $act == 'remove' )) {
			$this->vermgr();
		} elseif ($actId) {
			$this->vhostControl();
		} elseif ($act == 'restart') {
			$this->restartServer();
		} elseif ($act == 'toggledbg') {
			$this->cmd = ['toggledbg'];
			$this->issueCmd();
			sleep(2);
			$this->readStatus();
		}
		return true;
	}

	private function resetphp()
	{
		$touchfile = $_SERVER['LS_SERVER_ROOT'] . "admin/tmp/.lsphp_restart.txt"; //fixed location
		if (touch($touchfile)) {
			$this->messages[] = ['success', 'Successfully notified LiteSpeed server to restart all detached PHP processes.'];
		} else {
			$this->messages[] = ['error', 'Failed to notify LiteSpeed server to restart all detached PHP processes.'];
		}
	}

	public function waitForChange()
	{
		for ($count = 0; $count < 5; ++$count) {
			if ($this->checkLastMod()) {
				return true;
			}
			sleep(1);
		}
		return false;
	}

	private function readStatus()
	{
		$this->listeners = [];
		$this->adminL = [];
		$this->vhosts = [];
		$this->license = [];
		$fd = fopen($this->FSTATUS, 'r');
		if (!$fd) {
			return false;
		}

		while (!feof($fd)) {
			$buffer = fgets($fd, 512);
			if (strncmp($buffer, 'LISTENER0', 9) == 0) {
				$this->readListener($this->listeners, $buffer, $fd);
			} elseif (strncmp($buffer, 'LISTENER1', 9) == 0) {
				$this->readListener($this->adminL, $buffer, $fd);
			} elseif (strncmp($buffer, 'VHOST', 5) == 0) {
				$this->readVh($buffer, $fd);
			} elseif (strncmp($buffer, 'DEBUG_LOG: ', 11) == 0) {
				$this->debugOn = (substr($buffer, 11, 1) === '1') ? true : false;
			} elseif (strncmp($buffer, 'LICENSE', 7) == 0 || strncmp($buffer, 'FEATURES', 8) == 0) {
				$this->readLicenseInfo($buffer, $d);
			} elseif (strncmp($buffer, 'EOF', 3) == 0) {
				break;
			}
		}
		fclose($fd);
		return true;
	}

	private function readListener(&$l, $buffer, &$fd)
	{
		$m = [];
		if (preg_match("/\[(.+)\] (.+)$/", $buffer, $m)) {
			$lname = $m[1];
			$l[$lname]['addr'] = $m[2];
			$l[$lname]['status'] = 'Running';
			$tmp = fgets($fd, 512);
			while (strncmp($tmp, 'ENDL', 4) != 0) {
				if (strncmp($tmp, 'LVMAP', 5) == 0) {
					$tm = [];
					if (preg_match("/\[(.+)\] (.+)$/", $tmp, $tm)) {
						$l[$lname]['map'][$tm[1]][] = $tm[2];
					}
				}
				$tmp = fgets($fd, 512);
			}
		}
	}

	private function readVh($buffer, &$fd)
	{
		$m = [];
		if (preg_match("/\[(.+)\] ([01])/", $buffer, $m)) {
			$vname = $m[1];
			if ($vname != '_AdminVHost') {
				$this->vhosts[$m[1]] = $m[2] . 'S';
			}
		}
	}

	private function readLicenseInfo($buffer, &$fd)
	{
		// LICENSE_EXPIRES: 0, UPDATE_EXPIRES: 1597636800, SERIAL: , TYPE: 9:2
		$m = [];
		if (preg_match("/^LICENSE_EXPIRES: (\d+), UPDATE_EXPIRES: (\d+), SERIAL: (.+), TYPE: (.+)$/", $buffer, $m)) {
			$this->license['expires'] = $m[1];
			$this->license['updateExpires'] = $m[2];
			$this->license['serial'] = $m[3];
			$proc = trim($m[4]);
			if ($this->license['expires'] == 0) {
				$this->license['expires_date'] = 'Never';
			} else {
				$this->license['expires_date'] = date('M d, Y', $this->license['expires']);
			}
			$this->license['updateExpires_date'] = date('M d, Y', $this->license['updateExpires']);
			// translate proc to type
			$this->license['proc'] = $proc;
			$this->license['type'] = $this->translateLicProc($proc);
		} else if (preg_match("/FEATURES: (\d+)$/", $buffer, $m)) {
			$feature = $m[1];
			$this->license['feature'] = $feature;
			if (($feature & 1) == 0 && $this->license['proc'] == 1) {
				// no cache, old 1-CPU license
				$this->license['type'] = '1-CPU License (1-Worker)';
			}
		}
	}

	private function translateLicProc($proc)
	{
		if (strncmp($proc, '9:', 2) == 0) {
			return 'Web Host Elite (X-Worker = ' . substr($proc, 2) . ')';
		}
		switch ($proc) {
			// old type, to be retired
			case 'V':
				return 'VPS License (1-Worker with 2GB Memory Limit)';
			case 'U':
			case 'VU':
			case 'U1':
				return 'UltraVPS License (1-Worker with 8GB Memory Limit)';
			case '8':
				return '8-CPU License (8-Worker)';

			// current ones
			case 'F':
				return 'Free Starter (1-Domain & 1-Worker with 2GB Memory Limit)';
			case 'S':  // SiteOwner
				return 'Site Owner Plus (5-Domain & 1-Worker)';
			case 'SM': // SiteOwner with memeory limit
				return 'Site Owner (5-Domain 1-Worker with 8GB Memory Limit)';
			case 'D': // domain limit
				return 'Domain Limited (limited-Domain 1-Worker)';
			case 'DM': // domain and memory limit
				return 'Domain Limited (limited-Domain 1-Worker with 8GB Memory Limit)';
			case '1M': // 1cpu with memory limit
				return 'Web Host Lite (1-Worker with 8GB Memory Limit)';
			case '1':
				return 'Web Host Essential (1-Worker)';
			case '2':
				return 'Web Host Professional (2-Worker)';
			case '3':
				return 'Dedicated (3-Worker)';
			case '4':
				return 'Web Host Enterprise (4-Worker)';
			case 'X':
			case '9': // failsafe, should not happen
				return 'Web Host Elite (X-Worker)';
			default :
				return '1-Worker'; // do not error out to be safe
		}
	}

	public function checkLastMod()
	{
		clearstatcache();
		$mt = filemtime($this->FSTATUS);
		if ($this->serverLastModTime != $mt) {
			$this->serverLastModTime = $mt;
			return true;
		}
		return false;
	}

	public function restartServer()
	{
		$this->cmd = ['restart'];

		CLIENT::singleton()->setChanged(false);
		$this->issueCmd();
	}

	public function vermgr()
	{
		if ($this->act == 'switchTo') {
			$this->cmd = array("mgrver:$this->actId");
		} elseif ($this->act == 'remove') {
			$this->cmd = array("mgrver:-d $this->actId");
		} elseif ($this->act == 'upgrade') {
			$product = PRODUCT::GetInstance();
			$edition = 'std';
			if ($product->edition == 'ENTERPRISE') {
				$edition = 'ent';
			}
			$this->cmd = array("{$this->act}:{$this->actId}-$edition");
		} elseif ($this->act == 'validatelicense') {
			$this->cmd = ['ValidateLicense'];
		} else {
			unset($this->cmd);
			return; //illegal action
		}
		$this->issueCmd();
		$this->waitForChange();
		$this->readStatus();
	}

	public function vhostControl()
	{
		$this->cmd = array("$this->act:vhost:$this->actId");
		$this->issueCmd();
		$this->waitForChange();
		$this->readStatus();
	}

	public function install($app)
	{
		$this->cmd = array('install:' . $app);
		$this->issueCmd();
	}

	public static function getCommandSocket($cmd)
	{
		if (strncmp($_SERVER['LSWS_ADMIN_SOCK'], 'uds://', 6) == 0) {
			$sock = socket_create(AF_UNIX, SOCK_STREAM, 0);
			$chrootOffset = 0;
			if (isset($_SERVER['LS_CHROOT'])) {
				$chrootOffset = strlen($_SERVER['LS_CHROOT']);
			}
			$addr = substr($_SERVER['LSWS_ADMIN_SOCK'], 5 + $chrootOffset);
			if (socket_connect($sock, $addr) == false) {
				error_log("failed to connect to server addr ($addr)! socket_connect() failed: " . socket_strerror(socket_last_error()) . "\n");
				return false;
			}
		} else {
			$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
			$addr = explode(':', $_SERVER['LSWS_ADMIN_SOCK']);
			if (socket_connect($sock, $addr[0], intval($addr[1])) == false) {
				error_log('failed to connect to server (' . $_SERVER['LSWS_ADMIN_SOCK'] . ')! socket_connect() failed: ' . socket_strerror(socket_last_error()) . "\n");
				return false;
			}
		}
		$clientid = CLIENT::singleton()->getIdData();

		$uid = PMA_blowfish_decrypt($clientid['id'], $clientid['sec0']);
		$password = PMA_blowfish_decrypt($clientid['pass'], $clientid['sec1']);
		$outBuf = "auth:" . $uid . ':' . $password . "\n";
		$outBuf .= $cmd . "\n" . 'end of actions';
		socket_write($sock, $outBuf);
		socket_shutdown($sock, 1);
		return $sock;
	}

	private function issueCmd()
	{
		CLIENT::singleton()->reauthenticate();

		$commandline = '';
		foreach ($this->cmd as $line) {
			$commandline .= $line . "\n";
		}
		$sock = Service::getCommandSocket($commandline);
		if ($sock != false) {
			$res = socket_recv($sock, $buffer, 1024, 0);
			socket_close($sock);
			return (( $res > 0 ) && (strncasecmp($buffer, 'OK', 2) == 0 ));
		}
		return false;
	}

	public static function retrieveCommandData($cmd)
	{
		$sock = Service::getCommandSocket($cmd);
		$buffer = '';
		if ($sock != false) {
			$read = [$sock];
			$write = null;
			$except = null;
			$num_changed_sockets = socket_select($read, $write, $except, 3); //wait for max 3 seconds
			if ($num_changed_sockets === false) {
				error_log("socket_select failed: " . socket_strerror(socket_last_error()));
			} elseif ($num_changed_sockets > 0) {
				while (socket_recv($sock, $data, 8192, 0)) {
					$buffer .= $data;
				}
			}
			socket_close($sock);
		}
		return $buffer;
	}

	public function isPending()
	{
		if (file_exists($this->FNAME)) {
			$this->cmdStatus = 'IS_PENDING';
			return true;
		}
		return false;
	}

	public function getLogData()
	{
		$data = [];
		$data['filename'] = $this->getServerLog();
		$level = DUtil::getGoodVal(DUtil::grab_input('request', 'sel_level'));
		if ($level == null) {
			$level = 'I';
		}
		if (!in_array($level, ['E', 'W', 'N', 'I', 'D'])) {
			return null;
		}

		$data['level'] = $level;

		$fd = fopen($data['filename'], 'r');
		if (!$fd) {
			return null;
		}

		fseek($fd, 0, SEEK_END);
		$endpos = ftell($fd);
		fclose($fd);
		$data['logSize'] = number_format($endpos / 1024, 2);

		$searchSize = (int) DUtil::getGoodVal(DUtil::grab_input('request', 'searchSize'));
		if ($searchSize <= 0) {
			$searchSize = 20;
		} elseif ($searchSize > 512) {
			$searchSize = 512;
		}

		$data['searchSize'] = $searchSize;

		$searchFrom = (int) DUtil::getGoodVal(DUtil::grab_input('request', 'searchFrom'));

		if (isset($_REQUEST['end'])) {
			$searchFrom = $endpos;
		} else {
			if (isset($_REQUEST['prev'])) {
				$searchFrom -= $searchSize;
			} elseif (isset($_REQUEST['next'])) {
				$searchFrom += $searchSize;
			} elseif (isset($_REQUEST['begin'])) {
				$searchFrom = 0;
			}

			if ($searchFrom < 0) {
				$searchFrom = 0;
			}

			$data['searchFrom'] = $searchFrom;
			$searchFrom *= 1024;
		}

		$searchSize *= 1024;

		if ($searchFrom >= $endpos) {
			$searchFrom = $endpos - $searchSize;
			if ($searchFrom < 0) {
				$searchFrom = 0;
			}
			$data['searchFrom'] = number_format($searchFrom / 1024, 2, '.', '');
		}
		if ($searchFrom + $searchSize < $endpos) {
			$endpos = $searchFrom + $searchSize;
		}

		$data['fromPos'] = (int) $searchFrom;
		$data['endPos'] = (int) $endpos;
		return $data;
	}

	public function showErrLog(&$buf, $len = 20480)
	{
		$buf = [];
		$data = [];
		$data['filename'] = $this->getServerLog();
		$data['level'] = 'W';

		$fd = fopen($data['filename'], 'r');
		if (!$fd) {
			$buf[] = 'Failed read server log file from ' . $data['filename'];
			return 0;
		}

		fseek($fd, 0, SEEK_END);
		$data['endPos'] = ftell($fd);
		if ($data['endPos'] > $len) {
			$data['fromPos'] = $data['endPos'] - $len;
		} else {
			$data['fromPos'] = 0;
		}
		fclose($fd);
		$res = $this->getLog($data);

		if ($res[0] == 0) {
			return 0;
		}

		if ($res[0] > 10) {
			$r = explode("\n", $res[2]);
			$i = count($r) - 11;
			for ($j = 0; $j < 10; ++$j) {
				$buf[] = $r[$i + $j];
			}
			$res[0] = 'last 10';
		} else {
			$buf[] = $res[2];
		}

		return $res[0];
	}

	public function getLog($data)
	{
		$newlineTag = '[ERR[WAR[NOT[INF[DEB';
		$levels = array('E' => 1, 'W' => 2, 'N' => 3, 'I' => 4, 'D' => 5);
		$level = $levels[substr($data['level'], 0, 1)];

		$fd = fopen($data['filename'], 'r');
		if (!$fd) {
			echo '<tr><td class="message_error" colspan=3>Failed to read server log from file ' . $data['filename'] . '</td></tr>';
			exit;
		}
		$endpos = $data['endPos'];
		fseek($fd, (int)$data['fromPos']);
		$start = 0;
		$result = '';
		$totalLine = 0;
		$line = 0;
		$cutline = 0;
		$buffer = fgets($fd);
		while (!preg_match("/^\d{4}-\d{2}-\d{2} /", $buffer)) {
			$buffer = fgets($fd);
			if ($buffer === false) {
				break;
			}
			$curpos = ftell($fd);
			if ($curpos >= $endpos) {
				break;
			}
		}

		do {
			$buffer = chop($buffer);
			// check if new line
			$c28 = substr($buffer, 28, 3);
			if ($c28 && strstr($newlineTag, $c28)) {
				// is new line
				$totalLine ++;
				if ($start) {
					// finish prior line
					$result .= '</td></tr>' . "\n";
					$start = 0;
				}
				$b28 = substr($c28, 0, 1);
				if ($levels[$b28] <= $level) {
					// start a new line
					$start = 1;
					$line ++;
					$style = 'log_' . $b28;
					$result .= '<tr><td class="col_time ' . $style . '0">' . substr($buffer, 0, 26);
					$result .= '</td><td class="col_level ' . $style . '1">';
					$i = strpos($buffer, ']', 27);
					$result .= ( substr($buffer, 28, $i - 28) );
					$result .= '</td><td class="col_mesg ' . $style . '2">';
					$result .= htmlspecialchars(substr($buffer, $i + 2));
				}
			} elseif ($start) {
				// multi-line output
				$result .= '<br>' . htmlspecialchars($buffer);
			}

			$curpos = ftell($fd);
			if ($curpos >= $endpos) {
				break;
			}
		} while ($buffer = fgets($fd));

		fclose($fd);
		if ($start) {
			$result .= '</td></tr>' . "\n";
		}
		$res = [];
		$res[] = $line;
		$res[] = $totalLine;
		$res[] = $result;

		return $res;
	}

	public function getServerLog()
	{
		if ($this->serverLog == null) {
			require_once('ConfigFileEx.php');

			$confpath = $_SERVER['LS_SERVER_ROOT'] . "conf/httpd_config.xml"; //fixed location
			$logpath = ConfigFileEx::grepTagValue($confpath, 'logging.log.fileName');
			$this->serverLog = str_replace('//', '/', str_replace('$SERVER_ROOT', $_SERVER['LS_SERVER_ROOT'], $logpath));
		}
		return $this->serverLog;
	}

	public function download($version)
	{
		//validate param
		if (!preg_match("/^\d+\.\d+(\.\d+)?(RC\d+)?$/", $version)) {
			return false;
		}

		$product = PRODUCT::GetInstance();
		// e.g.: 'lsws-4.0.10-ent-i386-linux.tar.gz'
		$edition = 'std';
		if ($product->edition == 'ENTERPRISE') {
			$edition = 'ent';
		}
		$platform = $_SERVER['LS_PLATFORM'];
		if (strpos($platform, 'freebsd') !== false) {
			$pfrelease = explode('.', php_uname('r'));
			if ($pfrelease[0] >= 6) {
				$platform .= '6';
			}
		}
		$main_ver = $version[0] . '.0';
		$file = strtolower($product->type) . '-' . $version . '-' . $edition . '-' . $platform . '.tar.gz';
		$downloadurl = 'http://download.litespeedtech.com/packages/' . $main_ver . '/' . $file;
		$savedfile = $_SERVER['LS_SERVER_ROOT'] . 'autoupdate/' . $file;
		//echo "download url: $downloadurl\n";
		$buffer = file_get_contents($downloadurl);
		if ($buffer == false) {
			return false;
		}
		$saved = fopen($savedfile, 'wb');
		if ($saved == false) {
			return false;
		}
		$i = fwrite($saved, $buffer);
		if (!fclose($saved) || $i == false) {
			return false;
		}
		return true;
	}

	public function loadParam(&$holder, $line)
	{
		$t = preg_split('/[\s,:]/', $line, -1, PREG_SPLIT_NO_EMPTY);
		$c = count($t) / 2;

		for ($i = 0; $i < $c; ++$i) {
			if (is_array($holder) && array_key_exists($t[2 * $i], $holder)) {
				$holder[$t[2 * $i]] += $t[2 * $i + 1];
			} else {
				$holder[$t[2 * $i]] = $t[2 * $i + 1];
			}
		}
	}

	public static function GetLoadAvg()
	{
		$avgload = \sys_getloadavg();
		if ($avgload === false) {
			return 'N/A';
		}
		return implode(', ', array_map(function($load) {
					return round($load, 3);
				}, $avgload));
	}

}