<?php
/*
$Id$

  This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
  Copyright (C) 2008  Thomas Manninger
                2008  Roland Gruber

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/


/**
* Manages fixed IP addresses.
*
* @package modules
*
* @author Thomas Manninger
* @author Roland Gruber
*/

/**
* Manages fixed IP addresses.
*
* @package modules
*/

class fixed_ip extends baseModule {

	// fixed ips
	public $fixed_ips;
	
	// already processed?
	public $processed = false;

	// For check, if IPs overlapd.
	public $overlapd;
	
	// Original IPs
	public $orig_ips = array();
	
	public $attributes;

	public function get_metaData() {

		$return = array();
		// manages host accounts
		$return["account_types"] = array("dhcp");
		// alias name
		$return["alias"] = _("Fixed IP");
		// this is a base module
		$return["is_base"] = false;
		// RDN attribute
		$return["RDN"] = array("cn" => "high");
		// LDAP filter
		$return["ldap_filter"] = array();
		// module dependencies
		$return['dependencies'] = array('depends' => array('dhcp_settings'), 'conflicts' => array());
		// managed object classes
		$return['objectClasses'] = array();
		// managed attributes
		$return['attributes'] = array('dhcpOption');
		// help Entries
		$return['help'] = array(
				'pc' => array(
				"Headline" => _("PC name"),
				"Text" => _("The name of the PC.")
			) , 'mac' => array(
				"Headline" => _("MAC address"),
				"Text" => _("The MAC address of the PC. Example: 11:22:33:44:55:aa")
			) , 'ip' => array(
				"Headline" => _("IP address"),
				"Text" => _("The IP address of the PC.")
			) );
		// available PDF fields
		$return['PDF_fields'] = array('IPlist');
		return $return;
	}
	
	public function load_Messages() {
		$this->messages['errors'][0] = array('ERROR', _('One or more errors occured. The invalid fields are marked.'), '');
	}
	
	/**
	* Controls if the module button the account page is visible and activated.
	*
	* @return string status ("enabled", "disabled", "hidden")
	*/
	public function getButtonStatus() {
	    if ($_SESSION['account']->getAccountModule('dhcp_settings')->dn!=$_SESSION['config']->get_suffix('dhcp')) {
	    	return "enabled";
		}
		else {
		    return "hidden";
		}
	}

	/**
	 *
	 * Checked, if ips are overlapd.
	 *
	 * @param ip
	 *
	 * @return false, if overlapd, else true.
	 *
	 **/
	public function overlapd_ip($ip) {
		if (in_array($ip, $this->overlapd)) {
		    return false;
		}

		$this->overlapd[] = $ip;
		return true;
	}

	/**
	 *
	 * Reset the overlapd_range() function
	 *
	 **/
	 public function reset_overlapd_ip() {
	    $this->overlapd = array();
	 }
	
	/**
	 *
	 * Check, if a mac address is invalid
	 * @param mac adress
	 *
	 * @return true, if mac is invalid
	 **/
	public function check_mac($mac) {
	    $ex = explode(":", $mac);
		$invalid = false;
		if (count($ex)!=6) {
		    $invalid = true;
		}

		foreach($ex AS $value) {
			if (!preg_match("/[0-9a-fA-F][0-9a-fA-F]/", $value) || strlen($value)!="2") {
				$invalid = true;
			}
		}
		return $invalid;
	}
	
	/**
	 *
	 * Adapt the fixed ip with the subnet.
	 *
	 * @return true, if ip were edit.
	 *
	 **/
	public function reload_ips() {
	    // Only run it, when ranges already exists:
	    if(is_array($this->fixed_ip)) {
		    $ex_subnet = explode(".", $_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0]);
		    $ip_edit = false;        // Range were edit?
		    foreach ($this->fixed_ip AS $id=>$arr) {
		        if (!empty($this->fixed_ip[$id]['ip']) && !$_SESSION['account']->getAccountModule('range')->check_subnet_range($this->fixed_ip[$id]['ip'],$_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0])) {
		            // Range anpassen:
					$ex = explode(".", $this->fixed_ip[$id]['ip']);
					$tmp = $this->fixed_ip[$id]['ip'];
					$this->fixed_ip[$id]['ip'] = $ex_subnet['0'].".".$ex_subnet['1'].".".$ex_subnet['2'].".".$ex['3'];
					if ($tmp!=$this->fixed_ip[$id]['ip'])
						$ip_edit = true;
		        }
		    }
		}
		return $ip_edit;
	}
	
	/**
	 * This function loads all needed LDAP attributes.
	 *
	 * @param array $attr list of attributes
	 */
	function load_attributes($attr) {
	
	    if ($_SESSION['account']->getAccountModule('dhcp_settings')->dn!=$_SESSION['config']->get_suffix('dhcp')) {
	    
		    $sr = @ldap_search($_SESSION['ldap']->server(),'cn='.$_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0].','.$_SESSION['config']->get_suffix('dhcp'),
		    		'(objectClass=dhcpHost)', array(), 0, 0, 0, LDAP_DEREF_ALWAYS);
		    if ($sr) {
		        $entries = ldap_get_entries($_SESSION['ldap']->server(), $sr);
				for ($i=0; $i < $entries["count"]; $i++) {
					$this->fixed_ip[$i]['cn'] = $entries[$i]['cn'][0];
					$this->fixed_ip[$i]['mac'] = array_pop(explode(" ", $entries[$i]['dhcphwaddress'][0]));
					$this->fixed_ip[$i]['ip'] = array_pop(explode(" ", $entries[$i]['dhcpstatements'][0]));
	
					$this->orig_ips[$i]['cn'] = $entries[$i]['cn'][0];
					$this->orig_ips[$i]['mac'] = array_pop(explode(" ", $entries[$i]['dhcphwaddress'][0]));
					$this->orig_ips[$i]['ip'] = array_pop(explode(" ", $entries[$i]['dhcpstatements'][0]));
				}
		    }
		}
	}

	
	/**
	* Processes user input of the primary module page.
	* It checks if all input values are correct and updates the associated LDAP attributes.
	*
	* @return array list of info/error messages
	*/
	public function process_attributes() {
		$errors = array();
		if ($_SESSION['account']->getAccountModule('dhcp_settings')->dn!=$_SESSION['config']->get_suffix('dhcp')) {
			$this->processed = true;

			$this->reset_overlapd_ip();

			if ($_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0]!="") {

				$error = false;     // errors by process_attributes()?
				$pcs = array();
				foreach($this->fixed_ip AS $id=>$arr) {

			        // Check if ip is to drop
				    if (isset($_POST['drop_ip_'.$id])) {
						// Drop ip:
						unset($this->fixed_ip[$id]);
				        continue;
				    }

					// MAC address
					$_POST['mac_'.$id] = strtolower(trim($_POST['mac_'.$id]));

					$invalid = $this->check_mac($_POST['mac_'.$id]);
					if ($invalid) {
					    $error = true;
					}
					else {
					    $this->attributes['dhcpHWAddress'][0] = "ethernet ". $_POST['mac'];
					}
					$this->fixed_ip[$id]['mac'] = $_POST['mac_'.$id];

					// Ip address
					if (!empty($_POST['ip_'.$id])) {
						$_POST['ip_'.$id] = trim($_POST['ip_'.$id]);
					}
					if (!empty($_POST['ip_'.$id]) && !(check_ip($_POST['ip_'.$id]) || get_preg($_POST['ip_'.$id], 'DNSname'))) {
						$error = true;
						$this->fixed_ip[$id]['ip'] = $_POST['ip_'.$id];
					}
					elseif (empty($_POST['ip_'.$id])) {
						$error = true;
						$this->fixed_ip[$id]['ip'] = $_POST['ip_'.$id];
					}
					elseif (!$this->overlapd_ip($_POST['ip_'.$id])) {
						$error = true;
						$this->fixed_ip[$id]['ip'] = $_POST['ip_'.$id];
					}
					else {
						$this->fixed_ip[$id]['ip'] = $_POST['ip_'.$id];
					}

					// Is ip correct with subnet:
					if (check_ip($_POST['ip_'.$id]) && !$_SESSION['account']->getAccountModule('range')->check_subnet_range($_POST['ip_'.$id], $_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0]) ) {
					    $error = true;
					}

					// cn:
					if (!empty($_POST['pc_'.$id])) $_POST['pc_'.$id] = trim($_POST['pc_'.$id]);
	                if (!empty($_POST['pc_'.$id])) {

						// Already use?
						if (in_array($_POST['pc_'.$id], $pcs) ) {
						    $error = true;
						}
						else {
						    $pcs[] = $_POST['pc_'.$id];
						}
					}
					else {
						$error = true;
					}
					if (strlen($_POST['pc_'.$id])>30) {
					    $error = true;
					}
					if (!preg_match("/^[A-Za-z0-9\._-]*$/",$_POST['pc_'.$id])) {
					    $error = true;
					}
					$this->fixed_ip[$id]['cn'] = $_POST['pc_'.$id];
				}
				if ($error) {
				    $errors[] = $this->messages['errors'][0];
				}
			}

			// Add new IP
			if(isset($_POST['add_ip'])) {
			    // Add IP:
				$this->fixed_ip[] = array('cn' => $_POST['pc_add'], 'mac' => $_POST['mac_add'], 'ip' => $_POST['ip_add']);
			}
		}
		
		return $errors;
	}
	
	/* This function will create the html-page
	* to show a page with all attributes.
	* It will output a complete html-table
	*/
	public function display_html_attributes() {
		if ($_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0]=="") {
            echo "<b>" . _("Please fill out the DHCP settings first.") . "</b>";
        }
        else {
        	// caption
			$return[] = array(
				array('kind' => 'table', 'value' => array(array(
					array('kind' => 'text', 'text' => _('PC name') . "*"),
					array('kind' => 'help', 'value' => 'pc', 'scope' => 'user'),
				))),
				array('kind' => 'table', 'value' => array(array(
					array('kind' => 'text', 'text' => _('MAC address') . "*"),
					array('kind' => 'help', 'value' => 'mac', 'scope' => 'user'),
				))),
				array('kind' => 'table', 'value' => array(array(
					array('kind' => 'text', 'text' => _('IP address') . "*"),
					array('kind' => 'help', 'value' => 'ip', 'scope' => 'user'),
				))),
				array('kind' => 'text', 'text' => ''),
			);
        	// Reset oberlaped ips
			$this->reset_overlapd_ip();

			// If $ranges is not a array, then create one:
			if (!is_array($this->fixed_ip)) {
				$this->fixed_ip[] = array();
			}
            $pcs = array();
	        foreach($this->fixed_ip AS $id=>$arr) {
				// pc name
				$result = @ldap_search($_SESSION['ldap']->server(),"cn=".$_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0].",".$_SESSION['config']->get_Suffix('dhcp'),
							'(cn='.$_POST['pc_'.$id].')', array(), 0, 0, 0, LDAP_DEREF_ALWAYS);
	            $num = (@ldap_get_entries($_SESSION['ldap']->server(), $result)=="")?0:ldap_get_entries($_SESSION['ldap']->server(), $result);
				$pcError = "";
				if (!$this->processed) {
                	$pcError = "";
				}
				elseif (strlen($this->fixed_ip[$id]['cn'])>20) {
				    $pcError = _("The PC name may not be longer than 20 characters.");
				}
				elseif (strlen($this->fixed_ip[$id]['cn'])<2) {
				    $pcError = _("The PC name needs to be at least 2 characters long.");
				}
				elseif (in_array($this->fixed_ip[$id]['cn'], $pcs) ) {
				    $pcError = _("This PC name already exists.");
				}
				elseif (!preg_match("/^[A-Za-z0-9\._-]*$/",$_POST['pc_'.$id])) {
					$pcError = _("The PC name may only contain A-Z, a-z and 0-9.");
				}
				$pcs[] = $this->fixed_ip[$id]['cn'];

				// MAC address
				$macError = "";
				if (!$this->processed) {
                	$macError = "";
				}
				elseif ($this->check_mac($this->fixed_ip[$id]['mac'])) {
				    $macError = _("Invalid MAC address.");
				}
                    
				// fixed ip
				$ipError = "";
				if (!$this->processed) {
                	$ipError = "";
				}
				elseif (($this->fixed_ip[$id]['ip'] == '') || !check_ip($this->fixed_ip[$id]['ip'])) {
					$ipError = _("The IP address is invalid.");
				}
				elseif (!$_SESSION['account']->getAccountModule('range')->check_subnet_range($this->fixed_ip[$id]['ip'], $_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0]) ) {
				    $ipError = _("The IP address does not match the subnet.");
				}
				elseif (!$this->overlapd_ip($this->fixed_ip[$id]['ip'])) {
				    $ipError = _("The IP address is already in use.");
				}
				$error = '';
				if ($pcError != '') {
					$error .= ' ' . $pcError;
				}
				if ($macError != '') {
					$error .= ' ' . $macError;
				}
				if ($ipError != '') {
					$error .= ' ' . $ipError;
				}
				if ($error != '') {
					$error = '&nbsp;&laquo; ' . $error;
				}
				$return[] = array(
					array('kind' => 'input', 'name' => 'pc_'.$id, 'value' => $this->fixed_ip[$id]['cn']),
					array('kind' => 'input', 'name' => 'mac_'.$id, 'value' => $this->fixed_ip[$id]['mac']),
					array('kind' => 'input', 'name' => 'ip_'.$id, 'value' => $this->fixed_ip[$id]['ip']),
					array('kind' => 'input', 'name' => 'drop_ip_'.$id, 'type' => 'submit', 'value' => ' ', 'image' => 'del.png'),
					array('kind' => 'text', 'text'=>$error),
				);
			}
			$return[] = array(
				array('kind' => 'text', 'text' => ''),
			);
			// add fixed ip:
			$return[] = array(
				array('kind' => 'input', 'name' => 'pc_add', 'value' => ''),
				array('kind' => 'input', 'name' => 'mac_add', 'value' => ''),
				array('kind' => 'input', 'name' => 'ip_add', 'value' => ''),
				array('kind' => 'input', 'name' => 'add_ip', 'type' => 'submit', 'value' => ' ', 'image' => 'add.png'),
			);
		}
		
		return $return;
	}
	
	/* This function returns an array with 4 entries:
	* array( DN1 ('add' => array($attr), 'remove' => array($attr), 'modify' => array($attr), 'lamdaemon' => array(cmds)), DN2 .... )
	* DN is the DN to change. It may be possible to change several DNs,
	* e.g. create a new user and add him to some groups via attribute memberUid
	* add are attributes which have to be added to ldap entry
	* remove are attributes which have to be removed from ldap entry
	* lamdaemon are lamdaemon commands to modify homedir, quotas, ...
	*/
	public function save_attributes() {

	}
	
	/**
	 * This function is overwritten because the fixed IPs are set after the ldap_add command.
	 * 
	 * @see baseModule::postModifyActions()
	 *
	 * @param boolean $newAccount
	 * @param array $attributes LDAP attributes of this entry
	 */
	public function postModifyActions($newAccount, $attributes) {
		if ($_SESSION['account']->getAccountModule('dhcp_settings')->dn!=$_SESSION['config']->get_suffix('dhcp')) {
		    $add = array();
		    $delete = array();
			// Which dns are to delete and to add
			foreach($this->orig_ips AS $id=>$arr) {
				// Exist cn still?
				$in_arr = false;
				foreach($this->fixed_ip AS $idB=>$arr) {
				    if ($this->orig_ips[$id]['cn']==$this->fixed_ip[$idB]['cn']) {
				        $in_arr = true;

						// Was cn edit?
						if($this->orig_ips[$id]['ip']!=$this->fixed_ip[$idB]['ip']) {
							$delete[] = $this->orig_ips[$id]['cn'];
							$add[] = $this->fixed_ip[$idB];
						}
					}
				}
	            if (!$in_arr) {
	            	$delete[] = $this->orig_ips[$id]['cn'];
	            }
		    }

			if (!is_array($this->fixed_ip))
			    $this->fixed_ip = array();

		    // Which entrys are new:
		    foreach($this->fixed_ip AS $id=>$arr) {
		        $in_arr = false;
		        foreach($this->orig_ips AS $idB=>$arr) {
		            if ($this->orig_ips[$idB]['cn']==$this->fixed_ip[$id]['cn']) {
		                $in_arr = true;
		            }
		        }
		        if (!$in_arr) {
		            $add[] = $this->fixed_ip[$id];
		        }
		    }

			foreach($delete AS $dn) {
			    ldap_delete($_SESSION['ldap']->server(),'cn='.$dn.',cn='.$_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0].','.$_SESSION['config']->get_suffix('dhcp'));
			}

		    foreach($add AS $id=>$arr) {
				$attr = array();
				$attr['cn'] = $add[$id]['cn'];
				$attr['objectClass'][0] = 'top';
				$attr['objectClass'][1] = 'dhcpHost';
				$attr['dhcpHWAddress'] = 'ethernet '.$add[$id]['mac'];
				$attr['dhcpStatements'] = 'fixed-address '.$add[$id]['ip'];
				if ($attr['cn']!="")
					ldap_add($_SESSION['ldap']->server(),'cn='.$add[$id]['cn'].',cn='.$_SESSION['account']->getAccountModule('dhcp_settings')->attributes['cn'][0].','.$_SESSION['config']->get_suffix('dhcp'),$attr);
		    }
		}
	}

	/**
	* Returns the PDF entries for this module.
	*
	* @return array list of possible PDF entries
	*/
	function get_pdfEntries() {
		$return = array();
		if (is_array($this->fixed_ip) && (sizeof($this->fixed_ip) > 0)) {
			$return[get_class($this) . '_IPlist'] = array('<block><tr><td width="20%" align=\"L\"><b>' . _('PC name') . "</b></td><td width=\"20%\" align=\"L\"><b>" . _('IP address') . "</b></td><td width=\"20%\" align=\"L\"><b>" . _('MAC address') . '</b></td></tr></block>');
			for ($i = 0; $i < sizeof($this->fixed_ip); $i++) {
				$name = $this->fixed_ip[$i]['cn'];
				$mac = $this->fixed_ip[$i]['mac'];
				$ip = $this->fixed_ip[$i]['ip'];
				$return[get_class($this) . '_IPlist'][] = '<block><tr><td width="20%" align=\"L\">' . $name . "</td><td width=\"20%\" align=\"L\">" . $ip . "</td><td width=\"20%\" align=\"L\">" . $mac . '</td></tr></block>';
			}
		}
		return $return;
	}
	
}

?>