<?php
/***************************************************************************
 *                              admin_ban.php
 *                            -------------------
 *   begin                : Tuesday, Jul 31, 2001
 *   copyright            : (C) 2001 The phpBB Group
 *   email                : support@phpbb.com
 *
 *   $Id$
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   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.
 *
 ***************************************************************************/

define('IN_PHPBB', 1);

if( !empty($setmodules) )
{
	if ( !$acl->get_acl_admin('ban') )
	{
		return;
	}

	$filename = basename(__FILE__);
	$module['Users']['Ban_users'] = $filename . "$SID&amp;mode=user";
	$module['Users']['Ban_emails'] = $filename . "$SID&amp;mode=email";
	$module['Users']['Ban_ips'] = $filename . "$SID&amp;mode=ip";

	return;
}

//
// Load default header
//
$phpbb_root_path = '../';
require($phpbb_root_path . 'extension.inc');
require('pagestart.' . $phpEx);

//
//
//
if ( !$acl->get_acl_admin('ban') )
{
	return;
}

//
// Start program
//
if( isset($HTTP_POST_VARS['submit']) )
{
	$user_bansql = '';
	$email_bansql = '';
	$ip_bansql = '';

	$user_list = array();
	if( isset($HTTP_POST_VARS['ban_user']) )
	{
		$user_list_temp = $HTTP_POST_VARS['ban_user'];

		for($i = 0; $i < count($user_list_temp); $i++)
		{
			$user_list[] = trim($user_list_temp[$i]);
		}
	}

	$ip_list = array();
	if( isset($HTTP_POST_VARS['ban_ip']) )
	{
		$ip_list_temp = explode(',', $HTTP_POST_VARS['ban_ip']);

		for($i = 0; $i < count($ip_list_temp); $i++)
		{
			if( preg_match('/^([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})[ ]*\-[ ]*([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/', trim($ip_list_temp[$i]), $ip_range_explode) )
			{
				//
				// Don't ask about all this, just don't ask ... !
				//
				$ip_1_counter = $ip_range_explode[1];
				$ip_1_end = $ip_range_explode[5];

				while($ip_1_counter <= $ip_1_end)
				{
					$ip_2_counter = ($ip_1_counter == $ip_range_explode[1]) ? $ip_range_explode[2] : 0;
					$ip_2_end = ($ip_1_counter < $ip_1_end) ? 254 : $ip_range_explode[6];

					if($ip_2_counter == 0 && $ip_2_end == 254)
					{
						$ip_2_counter = 256;
						$ip_2_fragment = 256;

						$ip_list[] = "$ip_1_counter.256.256.256";
					}

					while($ip_2_counter <= $ip_2_end)
					{
						$ip_3_counter = ($ip_2_counter == $ip_range_explode[2] && $ip_1_counter == $ip_range_explode[1]) ? $ip_range_explode[3] : 0;
						$ip_3_end = ($ip_2_counter < $ip_2_end || $ip_1_counter < $ip_1_end) ? 254 : $ip_range_explode[7];

						if($ip_3_counter == 0 && $ip_3_end == 254 )
						{
							$ip_3_counter = 256;
							$ip_3_fragment = 256;

							$ip_list[] = "$ip_1_counter.$ip_2_counter.256.256";
						}

						while($ip_3_counter <= $ip_3_end)
						{
							$ip_4_counter = ($ip_3_counter == $ip_range_explode[3] && $ip_2_counter == $ip_range_explode[2] && $ip_1_counter == $ip_range_explode[1]) ? $ip_range_explode[4] : 0;
							$ip_4_end = ($ip_3_counter < $ip_3_end || $ip_2_counter < $ip_2_end) ? 254 : $ip_range_explode[8];

							if($ip_4_counter == 0 && $ip_4_end == 254)
							{
								$ip_4_counter = 256;
								$ip_4_fragment = 256;

								$ip_list[] = "$ip_1_counter.$ip_2_counter.$ip_3_counter.256";
							}

							while($ip_4_counter <= $ip_4_end)
							{
								$ip_list[] = "$ip_1_counter.$ip_2_counter.$ip_3_counter.$ip_4_counter";
								$ip_4_counter++;
							}
							$ip_3_counter++;
						}
						$ip_2_counter++;
					}
					$ip_1_counter++;
				}
			}
			else if( preg_match('/^([\w\-_]\.?){2,}$/is', trim($ip_list_temp[$i])) )
			{
				$ip = gethostbynamel(trim($ip_list_temp[$i]));

				for($j = 0; $j < count($ip); $j++)
				{
					if( !empty($ip[$j]) )
					{
						$ip_list[] = $ip[$j];
					}
				}
			}
			else if( preg_match('/^([0-9]{1,3})\.([0-9\*]{1,3})\.([0-9\*]{1,3})\.([0-9\*]{1,3})$/', trim($ip_list_temp[$i])) )
			{
				$ip_list[] = str_replace('*', '256', trim($ip_list_temp[$i]));
			}
		}
	}

	$email_list = array();
	if(isset($HTTP_POST_VARS['ban_email']))
	{
		$email_list_temp = explode(',', $HTTP_POST_VARS['ban_email']);

		for($i = 0; $i < count($email_list_temp); $i++)
		{
			//
			// This ereg match is based on one by php@unreelpro.com
			// contained in the annotated php manual at php.com (ereg
			// section)
			//
			if( eregi('^(([[:alnum:]\*]+([-_.][[:alnum:]\*]+)*\.?)|(\*))@([[:alnum:]]+([-_]?[[:alnum:]]+)*\.){1,3}([[:alnum:]]{2,6})$', trim($email_list_temp[$i])) )
			{
				$email_list[] = trim($email_list_temp[$i]);
			}
		}
	}

	$sql = "SELECT *
		FROM " . BANLIST_TABLE;
	if( !$result = $db->sql_query($sql) )
	{
		message_die(GENERAL_ERROR, "Couldn't obtain banlist information", "", __LINE__, __FILE__, $sql);
	}

	$current_banlist = $db->sql_fetchrowset($result);

	$kill_session_sql = '';
	for($i = 0; $i < count($user_list); $i++)
	{
		$in_banlist = false;
		for($j = 0; $j < count($current_banlist); $j++)
		{
			if($user_list[$i] == $current_banlist[$j]['ban_userid'])
			{
				$in_banlist = true;
			}
		}

		if(!$in_banlist)
		{
			$kill_session_sql .= ( ($kill_session_sql != '') ? ' OR ' : '' ) . "session_user_id = " . $user_list[$i];

			$sql = "INSERT INTO " . BANLIST_TABLE . " (ban_userid)
				VALUES (" . $user_list[$i] . ")";
			if( !$result = $db->sql_query($sql) )
			{
				message_die(GENERAL_ERROR, "Couldn't insert ban_userid info into database", "", __LINE__, __FILE__, $sql);
			}
		}
	}

	for($i = 0; $i < count($ip_list); $i++)
	{
		$in_banlist = false;
		for($j = 0; $j < count($current_banlist); $j++)
		{
			if($ip_list[$i] == $current_banlist[$j]['ban_ip'])
			{
				$in_banlist = true;
			}
		}

		if ( !$in_banlist )
		{
			$kill_ip_sql = ( preg_match('/256/s') ) ? "session_ip LIKE '" . preg_replace('/(256)/s', '%', $ip_list[$i]) . "'" : "session_ip = '" . $ip_list[$i] . "'";

			$kill_session_sql .= ( ($kill_session_sql != '') ? ' OR ' : '' ) . $kill_ip_sql;

			$sql = "INSERT INTO " . BANLIST_TABLE . " (ban_ip)
				VALUES ('" . $ip_list[$i] . "')";
			if( !$result = $db->sql_query($sql) )
			{
				message_die(GENERAL_ERROR, "Couldn't insert ban_ip info into database", "", __LINE__, __FILE__, $sql);
			}
		}
	}

	//
	// Now we'll delete all entries from the
	// session table with any of the banned
	// user or IP info just entered into the
	// ban table ... this will force a session
	// initialisation resulting in an instant
	// ban
	//
	if( $kill_session_sql != "" )
	{
		$sql = "DELETE FROM " . SESSIONS_TABLE . "
			WHERE $kill_session_sql";
		if( !$result = $db->sql_query($sql) )
		{
			message_die(GENERAL_ERROR, "Couldn't delete banned sessions from database", "", __LINE__, __FILE__, $sql);
		}
	}

	for($i = 0; $i < count($email_list); $i++)
	{
		$in_banlist = false;
		for($j = 0; $j < count($current_banlist); $j++)
		{
			if( $email_list[$i] == $current_banlist[$j]['ban_email'] )
			{
				$in_banlist = true;
			}
		}

		if( !$in_banlist )
		{
			$sql = "INSERT INTO " . BANLIST_TABLE . " (ban_email)
				VALUES ('" . str_replace("\'", "''", $email_list[$i]) . "')";
			if( !$result = $db->sql_query($sql) )
			{
				message_die(GENERAL_ERROR, "Couldn't insert ban_email info into database", "", __LINE__, __FILE__, $sql);
			}
		}
	}

	$where_sql = "";

	if(isset($HTTP_POST_VARS['unban_user']))
	{
		$user_list = $HTTP_POST_VARS['unban_user'];

		for($i = 0; $i < count($user_list); $i++)
		{
			if($user_list[$i] != -1)
			{
				if($where_sql != "")
				{
					$where_sql .= ", ";
				}
				$where_sql .= $user_list[$i];
			}
		}
	}

	if( isset($HTTP_POST_VARS['unban_ip']) )
	{
		$ip_list = $HTTP_POST_VARS['unban_ip'];

		for($i = 0; $i < count($ip_list); $i++)
		{
			if($ip_list[$i] != -1)
			{
				if($where_sql != "")
				{
					$where_sql .= ", ";
				}
				$where_sql .= $ip_list[$i];
			}
		}
	}

	if( isset($HTTP_POST_VARS['unban_email']) )
	{
		$email_list = $HTTP_POST_VARS['unban_email'];

		for($i = 0; $i < count($email_list); $i++)
		{
			if($email_list[$i] != -1)
			{
				if($where_sql != "")
				{
					$where_sql .= ", ";
				}
				$where_sql .= $email_list[$i];
			}
		}
	}

	if( $where_sql != "" )
	{
		$sql = "DELETE FROM " . BANLIST_TABLE . "
			WHERE ban_id IN ($where_sql)";
		if( !$result = $db->sql_query($sql) )
		{
			message_die(GENERAL_ERROR, "Couldn't delete ban info from database", "", __LINE__, __FILE__, $sql);
		}
	}

	$message = $lang['Ban_update_sucessful'] . "<br /><br />" . sprintf($lang['Click_return_banadmin'], "<a href=\"" . append_sid("admin_user_ban.$phpEx") . "\">", "</a>") . "<br /><br />" . sprintf($lang['Click_return_admin_index'], "<a href=\"" . append_sid("index.$phpEx?pane=right") . "\">", "</a>");

	message_die(GENERAL_MESSAGE, $message);

}
else
{
	$template->set_filenames(array(
		'body' => 'admin/user_ban_body.tpl')
	);

	$template->assign_vars(array(
		'L_BAN_TITLE' => $lang['Ban_control'],
		'L_BAN_EXPLAIN' => $lang['Ban_explain'],
		'L_BAN_EXPLAIN_WARN' => $lang['Ban_explain_warn'],
		'L_IP_OR_HOSTNAME' => $lang['IP_hostname'],
		'L_EMAIL_ADDRESS' => $lang['Email_address'],
		'L_SUBMIT' => $lang['Submit'],
		'L_RESET' => $lang['Reset'],

		'S_BANLIST_ACTION' => append_sid("admin_user_ban.$phpEx"))
	);

	$userban_count = 0;

	$sql = "SELECT user_id, username
		FROM " . USERS_TABLE . "
		WHERE user_id <> " . ANONYMOUS . "
		ORDER BY username ASC";
	if ( !($result = $db->sql_query($sql)) )
	{
		message_die(GENERAL_ERROR, 'Could not select current user_id ban list', '', __LINE__, __FILE__, $sql);
	}

	$user_list = $db->sql_fetchrowset($result);
	$db->sql_freeresult($result);

	$select_userlist = '';
	for($i = 0; $i < count($user_list); $i++)
	{
		$select_userlist .= '<option value="' . $user_list[$i]['user_id'] . '">' . $user_list[$i]['username'] . '</option>';
		$userban_count++;
	}
	$select_userlist = '<select name="ban_user[]" multiple="multiple" size="5">' . $select_userlist . '</select>';

	$template->assign_vars(array(
		'L_BAN_USER' => $lang['Ban_username'],
		'L_BAN_USER_EXPLAIN' => $lang['Ban_username_explain'],
		'L_BAN_IP' => $lang['Ban_IP'],
		'L_BAN_IP_EXPLAIN' => $lang['Ban_IP_explain'],
		'L_BAN_EMAIL' => $lang['Ban_email'],
		'L_BAN_EMAIL_EXPLAIN' => $lang['Ban_email_explain'],

		'S_BAN_USERLIST_SELECT' => $select_userlist)
	);

	$userban_count = 0;
	$ipban_count = 0;
	$emailban_count = 0;

	$sql = "SELECT b.ban_id, u.user_id, u.username
		FROM " . BANLIST_TABLE . " b, " . USERS_TABLE . " u
		WHERE u.user_id = b.ban_userid
			AND b.ban_userid <> 0
			AND u.user_id <> " . ANONYMOUS . "
		ORDER BY u.user_id ASC";
	if ( !($result = $db->sql_query($sql)) )
	{
		message_die(GENERAL_ERROR, 'Could not select current user_id ban list', '', __LINE__, __FILE__, $sql);
	}

	$user_list = $db->sql_fetchrowset($result);
	$db->sql_freeresult($result);

	$select_userlist = '';
	for($i = 0; $i < count($user_list); $i++)
	{
		$select_userlist .= '<option value="' . $user_list[$i]['ban_id'] . '">' . $user_list[$i]['username'] . '</option>';
		$userban_count++;
	}

	if( $select_userlist == '' )
	{
		$select_userlist = '<option value="-1">' . $lang['No_banned_users'] . '</option>';
	}

	$select_userlist = '<select name="unban_user[]" multiple="multiple" size="5">' . $select_userlist . '</select>';

	$sql = "SELECT ban_id, ban_ip, ban_email
		FROM " . BANLIST_TABLE;
	if ( !($result = $db->sql_query($sql)) )
	{
		message_die(GENERAL_ERROR, 'Could not select current ip ban list', '', __LINE__, __FILE__, $sql);
	}

	$banlist = $db->sql_fetchrowset($result);
	$db->sql_freeresult($result);

	$select_iplist = '';
	$select_emaillist = '';

	for($i = 0; $i < count($banlist); $i++)
	{
		$ban_id = $banlist[$i]['ban_id'];

		if ( !empty($banlist[$i]['ban_ip']) )
		{
			$ban_ip = str_replace('256', '*', $banlist[$i]['ban_ip']);
			$select_iplist .= '<option value="' . $ban_id . '">' . $ban_ip . '</option>';
			$ipban_count++;
		}
		else if ( !empty($banlist[$i]['ban_email']) )
		{
			$ban_email = $banlist[$i]['ban_email'];
			$select_emaillist .= '<option value="' . $ban_id . '">' . $ban_email . '</option>';
			$emailban_count++;
		}
	}

	if ( $select_iplist == '' )
	{
		$select_iplist = '<option value="-1">' . $lang['No_banned_ip'] . '</option>';
	}

	if ( $select_emaillist == '' )  
	{
		$select_emaillist = '<option value="-1">' . $lang['No_banned_email'] . '</option>';
	}

	$select_iplist = '<select name="unban_ip[]" multiple="multiple" size="5">' . $select_iplist . '</select>';
	$select_emaillist = '<select name="unban_email[]" multiple="multiple" size="5">' . $select_emaillist . '</select>';

	$template->assign_vars(array(
		'L_UNBAN_USER' => $lang['Unban_username'],
		'L_UNBAN_USER_EXPLAIN' => $lang['Unban_username_explain'],
		'L_UNBAN_IP' => $lang['Unban_IP'],
		'L_UNBAN_IP_EXPLAIN' => $lang['Unban_IP_explain'],
		'L_UNBAN_EMAIL' => $lang['Unban_email'],
		'L_UNBAN_EMAIL_EXPLAIN' => $lang['Unban_email_explain'],

		'S_UNBAN_USERLIST_SELECT' => $select_userlist,
		'S_UNBAN_IPLIST_SELECT' => $select_iplist,
		'S_UNBAN_EMAILLIST_SELECT' => $select_emaillist,
		'S_BAN_ACTION' => append_sid("admin_user_ban.$phpEx"))
	);
}

$template->pparse('body');

include('page_footer_admin.'.$phpEx);

?>