<?php

/**

 * PemFTP - A Ftp implementation in pure PHP

 *

 * @package PemFTP

 * @since 2.5

 *

 * @version 1.0

 * @copyright Alexey Dotsenko

 * @author Alexey Dotsenko

 * @link http://www.phpclasses.org/browse/package/1743.html Site

 * @license LGPL License http://www.opensource.org/licenses/lgpl-license.html

 */

/**

 * Socket Based FTP implementation

 *

 * @package PemFTP

 * @subpackage Socket

 * @since 2.5

 *

 * @version 1.0

 * @copyright Alexey Dotsenko

 * @author Alexey Dotsenko

 * @link http://www.phpclasses.org/browse/package/1743.html Site

 * @license LGPL License http://www.opensource.org/licenses/lgpl-license.html

 */

class ftp extends ftp_base {

	function ftp($verb=FALSE, $le=FALSE) {

		$this->__construct($verb, $le);

	}

	function __construct($verb=FALSE, $le=FALSE) {

		parent::__construct(true, $verb, $le);

	}

// <!-- --------------------------------------------------------------------------------------- -->

// <!--       Private functions                                                                 -->

// <!-- --------------------------------------------------------------------------------------- -->

	function _settimeout($sock) {

		if(!@socket_set_option($sock, SOL_SOCKET, SO_RCVTIMEO, array("sec"=>$this->_timeout, "usec"=>0))) {

			$this->PushError('_connect','socket set receive timeout',socket_strerror(socket_last_error($sock)));

			@socket_close($sock);

			return FALSE;

		}

		if(!@socket_set_option($sock, SOL_SOCKET , SO_SNDTIMEO, array("sec"=>$this->_timeout, "usec"=>0))) {

			$this->PushError('_connect','socket set send timeout',socket_strerror(socket_last_error($sock)));

			@socket_close($sock);

			return FALSE;

		}

		return true;

	}

	function _connect($host, $port) {

		$this->SendMSG("Creating socket");

		if(!($sock = @socket_create(AF_INET, SOCK_STREAM, SOL_TCP))) {

			$this->PushError('_connect','socket create failed',socket_strerror(socket_last_error($sock)));

			return FALSE;

		}

		if(!$this->_settimeout($sock)) return FALSE;

		$this->SendMSG("Connecting to \"".$host.":".$port."\"");

		if (!($res = @socket_connect($sock, $host, $port))) {

			$this->PushError('_connect','socket connect failed',socket_strerror(socket_last_error($sock)));

			@socket_close($sock);

			return FALSE;

		}

		$this->_connected=true;

		return $sock;

	}

	function _readmsg($fnction="_readmsg"){

		if(!$this->_connected) {

			$this->PushError($fnction,'Connect first');

			return FALSE;

		}

		$result=true;

		$this->_message="";

		$this->_code=0;

		$go=true;

		do {

			$tmp=@socket_read($this->_ftp_control_sock, 4096, PHP_BINARY_READ);

			if($tmp===false) {

				$go=$result=false;

				$this->PushError($fnction,'Read failed', socket_strerror(socket_last_error($this->_ftp_control_sock)));

			} else {

				$this->_message.=$tmp;

				$go = !preg_match("/^([0-9]{3})(-.+\\1)? [^".CRLF."]+".CRLF."$/Us", $this->_message, $regs);

			}

		} while($go);

		if($this->LocalEcho) echo "GET < ".rtrim($this->_message, CRLF).CRLF;

		$this->_code=(int)$regs[1];

		return $result;

	}

	function _exec($cmd, $fnction="_exec") {

		if(!$this->_ready) {

			$this->PushError($fnction,'Connect first');

			return FALSE;

		}

		if($this->LocalEcho) echo "PUT > ",$cmd,CRLF;

		$status=@socket_write($this->_ftp_control_sock, $cmd.CRLF);

		if($status===false) {

			$this->PushError($fnction,'socket write failed', socket_strerror(socket_last_error($this->stream)));

			return FALSE;

		}

		$this->_lastaction=time();

		if(!$this->_readmsg($fnction)) return FALSE;

		return TRUE;

	}

	function _data_prepare($mode=FTP_ASCII) {

		if(!$this->_settype($mode)) return FALSE;

		$this->SendMSG("Creating data socket");

		$this->_ftp_data_sock = @socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

		if ($this->_ftp_data_sock < 0) {

			$this->PushError('_data_prepare','socket create failed',socket_strerror(socket_last_error($this->_ftp_data_sock)));

			return FALSE;

		}

		if(!$this->_settimeout($this->_ftp_data_sock)) {

			$this->_data_close();

			return FALSE;

		}

		if($this->_passive) {

			if(!$this->_exec("PASV", "pasv")) {

				$this->_data_close();

				return FALSE;

			}

			if(!$this->_checkCode()) {

				$this->_data_close();

				return FALSE;

			}

			$ip_port = explode(",", ereg_replace("^.+ \\(?([0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]+,[0-9]+)\\)?.*".CRLF."$", "\\1", $this->_message));

			$this->_datahost=$ip_port[0].".".$ip_port[1].".".$ip_port[2].".".$ip_port[3];

            $this->_dataport=(((int)$ip_port[4])<<8) + ((int)$ip_port[5]);

			$this->SendMSG("Connecting to ".$this->_datahost.":".$this->_dataport);

			if(!@socket_connect($this->_ftp_data_sock, $this->_datahost, $this->_dataport)) {

				$this->PushError("_data_prepare","socket_connect", socket_strerror(socket_last_error($this->_ftp_data_sock)));

				$this->_data_close();

				return FALSE;

			}

			else $this->_ftp_temp_sock=$this->_ftp_data_sock;

		} else {

			if(!@socket_getsockname($this->_ftp_control_sock, $addr, $port)) {

				$this->PushError("_data_prepare","can't get control socket information", socket_strerror(socket_last_error($this->_ftp_control_sock)));

				$this->_data_close();

				return FALSE;

			}

			if(!@socket_bind($this->_ftp_data_sock,$addr)){

				$this->PushError("_data_prepare","can't bind data socket", socket_strerror(socket_last_error($this->_ftp_data_sock)));

				$this->_data_close();

				return FALSE;

			}

			if(!@socket_listen($this->_ftp_data_sock)) {

				$this->PushError("_data_prepare","can't listen data socket", socket_strerror(socket_last_error($this->_ftp_data_sock)));

				$this->_data_close();

				return FALSE;

			}

			if(!@socket_getsockname($this->_ftp_data_sock, $this->_datahost, $this->_dataport)) {

				$this->PushError("_data_prepare","can't get data socket information", socket_strerror(socket_last_error($this->_ftp_data_sock)));

				$this->_data_close();

				return FALSE;

			}

			if(!$this->_exec('PORT '.str_replace('.',',',$this->_datahost.'.'.($this->_dataport>>8).'.'.($this->_dataport&0x00FF)), "_port")) {

				$this->_data_close();

				return FALSE;

			}

			if(!$this->_checkCode()) {

				$this->_data_close();

				return FALSE;

			}

		}

		return TRUE;

	}

	function _data_read($mode=FTP_ASCII, $fp=NULL) {

		$NewLine=$this->_eol_code[$this->OS_local];

		if(is_resource($fp)) $out=0;

		else $out="";

		if(!$this->_passive) {

			$this->SendMSG("Connecting to ".$this->_datahost.":".$this->_dataport);

			$this->_ftp_temp_sock=socket_accept($this->_ftp_data_sock);

			if($this->_ftp_temp_sock===FALSE) {

				$this->PushError("_data_read","socket_accept", socket_strerror(socket_last_error($this->_ftp_temp_sock)));

				$this->_data_close();

				return FALSE;

			}

		}

		while(($block=@socket_read($this->_ftp_temp_sock, $this->_ftp_buff_size, PHP_BINARY_READ))!==false) {

			if($block==="") break;

			if($mode!=FTP_BINARY) $block=preg_replace("/\r\n|\r|\n/", $this->_eol_code[$this->OS_local], $block);

			if(is_resource($fp)) $out+=fwrite($fp, $block, strlen($block));

			else $out.=$block;

		}

		return $out;

	}

	function _data_write($mode=FTP_ASCII, $fp=NULL) {

		$NewLine=$this->_eol_code[$this->OS_local];

		if(is_resource($fp)) $out=0;

		else $out="";

		if(!$this->_passive) {

			$this->SendMSG("Connecting to ".$this->_datahost.":".$this->_dataport);

			$this->_ftp_temp_sock=socket_accept($this->_ftp_data_sock);

			if($this->_ftp_temp_sock===FALSE) {

				$this->PushError("_data_write","socket_accept", socket_strerror(socket_last_error($this->_ftp_temp_sock)));

				$this->_data_close();

				return false;

			}

		}

		if(is_resource($fp)) {

			while(!feof($fp)) {

				$block=fread($fp, $this->_ftp_buff_size);

				if(!$this->_data_write_block($mode, $block)) return false;

			}

		} elseif(!$this->_data_write_block($mode, $fp)) return false;

		return true;

	}

	function _data_write_block($mode, $block) {

		if($mode!=FTP_BINARY) $block=preg_replace("/\r\n|\r|\n/", $this->_eol_code[$this->OS_remote], $block);

		do {

			if(($t=@socket_write($this->_ftp_temp_sock, $block))===FALSE) {

				$this->PushError("_data_write","socket_write", socket_strerror(socket_last_error($this->_ftp_temp_sock)));

				$this->_data_close();

				return FALSE;

			}

			$block=substr($block, $t);

		} while(!empty($block));

		return true;

	}

	function _data_close() {

		@socket_close($this->_ftp_temp_sock);

		@socket_close($this->_ftp_data_sock);

		$this->SendMSG("Disconnected data from remote host");

		return TRUE;

	}

	function _quit() {

		if($this->_connected) {

			@socket_close($this->_ftp_control_sock);

			$this->_connected=false;

			$this->SendMSG("Socket closed");

		}

	}

}

?>