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<?php class erLhcoreClassIPDetect { public static function getIP() { if (erLhcoreClassSystem::$proxyMode === true) { if (isset($_SERVER["HTTP_CF_CONNECTING_IP"]) && filter_var($_SERVER["HTTP_CF_CONNECTING_IP"], FILTER_VALIDATE_IP)) { //#since cloudflare can trust this once $_SERVER['REMOTE_ADDR'] = $_SERVER["HTTP_CF_CONNECTING_IP"]; } elseif (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $_SERVER['REMOTE_ADDR'] = str_replace(' ', '', $_SERVER['HTTP_X_FORWARDED_FOR']); $parts = explode(',', $_SERVER['REMOTE_ADDR']); if (filter_var($parts[0], FILTER_VALIDATE_IP)) { //Don't trust anyone unlease you makesure It's IPAddress $_SERVER['REMOTE_ADDR'] = $parts[0]; } } } $_SERVER['REMOTE_ADDR'] = isset($_SERVER['REMOTE_ADDR']) ? strip_tags($_SERVER['REMOTE_ADDR']) : '127.0.0.1'; return $_SERVER["REMOTE_ADDR"]; } public static function getServerAddress() { if (array_key_exists('SERVER_ADDR', $_SERVER)) return $_SERVER['SERVER_ADDR']; elseif (array_key_exists('LOCAL_ADDR', $_SERVER) && $_SERVER['LOCAL_ADDR'] != '::1') return $_SERVER['LOCAL_ADDR']; elseif (array_key_exists('SERVER_NAME', $_SERVER)) return gethostbyname($_SERVER['SERVER_NAME']); } public static function isIgnored($ip, array $ignore_ips) { foreach ($ignore_ips as $ip_ignore) { if (self::ip_in_range($ip, trim($ip_ignore)) == true) { return true; } } return false; } /* * ip_in_range.php - Function to determine if an IP is located in a * specific range as specified via several alternative * formats. * * Network ranges can be specified as: * 1. Wildcard format: 1.2.3.* * 2. CIDR format: 1.2.3/24 OR 1.2.3.4/255.255.255.0 * 3. Start-End IP format: 1.2.3.0-1.2.3.255 * * Return value BOOLEAN : ip_in_range($ip, $range); * * Copyright 2008: Paul Gregg <pgregg@pgregg.com> * 10 January 2008 * Version: 1.2 * * Source website: http://www.pgregg.com/projects/php/ip_in_range/ * Version 1.2 * * This software is Donationware - if you feel you have benefited from * the use of this tool then please consider a donation. The value of * which is entirely left up to your discretion. * http://www.pgregg.com/donate/ * * Please do not remove this header, or source attibution from this file. / public static function ip_in_range($ip, $range) { if ($ip == $range) { return true; } elseif (strpos($range, '/') !== false) { // $range is in IP/NETMASK format list($range, $netmask) = explode('/', $range, 2); if (strpos($netmask, '.') !== false) { // $netmask is a 255.255.0.0 format $netmask = str_replace('', '0', $netmask); $netmask_dec = ip2long($netmask); return ((ip2long($ip) & $netmask_dec) == (ip2long($range) & $netmask_dec)); } else { // $netmask is a CIDR size block // fix the range argument $x = explode('.', $range); while (count($x) < 4) $x[] = '0'; list($a, $b, $c, $d) = $x; $range = sprintf("%u.%u.%u.%u", empty($a) ? '0' : $a, empty($b) ? '0' : $b, empty($c) ? '0' : $c, empty($d) ? '0' : $d); $range_dec = ip2long($range); $ip_dec = ip2long($ip); # Strategy 1 - Create the netmask with 'netmask' 1s and then fill it to 32 with 0s #$netmask_dec = bindec(str_pad('', $netmask, '1') . str_pad('', 32-$netmask, '0')); # Strategy 2 - Use math to create it $wildcard_dec = pow(2, (32 - $netmask)) - 1; $netmask_dec = ~$wildcard_dec; return (($ip_dec & $netmask_dec) == ($range_dec & $netmask_dec)); } } else { // range might be 255.255.. or 1.2.3.0-1.2.3.255 if (strpos($range, '') !== false) { // a.b..* format // Just convert to A-B format by setting * to 0 for A and 255 for B $lower = str_replace('', '0', $range); $upper = str_replace('', '255', $range); $range = "$lower-$upper"; } if (strpos($range, '-') !== false) { // A-B format list($lower, $upper) = explode('-', $range, 2); $lower_dec = (float)sprintf("%u", ip2long($lower)); $upper_dec = (float)sprintf("%u", ip2long($upper)); $ip_dec = (float)sprintf("%u", ip2long($ip)); return (($ip_dec >= $lower_dec) && ($ip_dec <= $upper_dec)); } return false; } } /* * ip_in_range.php - Function to determine if an IP is located in a * specific range as specified via several alternative * formats. * * Network ranges can be specified as: * 1. Wildcard format: 1.2.3.* * 2. CIDR format: 1.2.3/24 OR 1.2.3.4/255.255.255.0 * 3. Start-End IP format: 1.2.3.0-1.2.3.255 * * Return value BOOLEAN : ip_in_range($ip, $range); * * Copyright 2008: Paul Gregg <pgregg@pgregg.com> * 10 January 2008 * Version: 1.2 * * Source website: http://www.pgregg.com/projects/php/ip_in_range/ * Version 1.2 * * This software is Donationware - if you feel you have benefited from * the use of this tool then please consider a donation. The value of * which is entirely left up to your discretion. * http://www.pgregg.com/donate/ * * Please do not remove this header, or source attibution from this file. / / * Modified by James Greene <james@cloudflare.com> to include IPV6 support * (original version only supported IPV4). * 21 May 2012 / // decbin32 // In order to simplify working with IP addresses (in binary) and their // netmasks, it is easier to ensure that the binary strings are padded // with zeros out to 32 characters - IP addresses are 32 bit numbers public static function decbin32($dec) { return str_pad(decbin($dec), 32, '0', STR_PAD_LEFT); } // ipv4_in_range // This function takes 2 arguments, an IP address and a "range" in several // different formats. // Network ranges can be specified as: // 1. Wildcard format: 1.2.3. // 2. CIDR format: 1.2.3/24 OR 1.2.3.4/255.255.255.0 // 3. Start-End IP format: 1.2.3.0-1.2.3.255 // The function will return true if the supplied IP is within the range. // Note little validation is done on the range inputs - it expects you to // use one of the above 3 formats. public static function ipv4_in_range($ip, $range) { if (strpos($range, '/') !== false) { // $range is in IP/NETMASK format list($range, $netmask) = explode('/', $range, 2); if (strpos($netmask, '.') !== false) { // $netmask is a 255.255.0.0 format $netmask = str_replace('', '0', $netmask); $netmask_dec = ip2long($netmask); return ((ip2long($ip) & $netmask_dec) == (ip2long($range) & $netmask_dec)); } else { // $netmask is a CIDR size block // fix the range argument $x = explode('.', $range); while (count($x) < 4) $x[] = '0'; list($a, $b, $c, $d) = $x; $range = sprintf("%u.%u.%u.%u", empty($a) ? '0' : $a, empty($b) ? '0' : $b, empty($c) ? '0' : $c, empty($d) ? '0' : $d); $range_dec = ip2long($range); $ip_dec = ip2long($ip); # Strategy 1 - Create the netmask with 'netmask' 1s and then fill it to 32 with 0s #$netmask_dec = bindec(str_pad('', $netmask, '1') . str_pad('', 32-$netmask, '0')); # Strategy 2 - Use math to create it $wildcard_dec = pow(2, (32 - $netmask)) - 1; $netmask_dec = ~$wildcard_dec; return (($ip_dec & $netmask_dec) == ($range_dec & $netmask_dec)); } } else { // range might be 255.255..* or 1.2.3.0-1.2.3.255 if (strpos($range, '') !== false) { // a.b..* format // Just convert to A-B format by setting * to 0 for A and 255 for B $lower = str_replace('', '0', $range); $upper = str_replace('', '255', $range); $range = "$lower-$upper"; } if (strpos($range, '-') !== false) { // A-B format list($lower, $upper) = explode('-', $range, 2); $lower_dec = (float)sprintf("%u", ip2long($lower)); $upper_dec = (float)sprintf("%u", ip2long($upper)); $ip_dec = (float)sprintf("%u", ip2long($ip)); return (($ip_dec >= $lower_dec) && ($ip_dec <= $upper_dec)); } return false; } } public static function ip2long6($ip) { if (substr_count($ip, '::')) { $ip = str_replace('::', str_repeat(':0000', 8 - substr_count($ip, ':')) . ':', $ip); } $ip = explode(':', $ip); $r_ip = ''; foreach ($ip as $v) { $r_ip .= str_pad(base_convert($v, 16, 2), 16, 0, STR_PAD_LEFT); } return base_convert($r_ip, 2, 10); } // Get the ipv6 full format and return it as a decimal value. public static function get_ipv6_full($ip) { $pieces = explode("/", $ip, 2); $left_piece = $pieces[0]; $right_piece = isset($pieces[1]) ? $pieces[1] : ''; // Extract out the main IP pieces $ip_pieces = explode("::", $left_piece, 2); $main_ip_piece = $ip_pieces[0]; $last_ip_piece = $ip_pieces[1]; // Pad out the shorthand entries. $main_ip_pieces = explode(":", $main_ip_piece); foreach ($main_ip_pieces as $key => $val) { $main_ip_pieces[$key] = str_pad($main_ip_pieces[$key], 4, "0", STR_PAD_LEFT); } // Check to see if the last IP block (part after ::) is set $last_piece = ""; $size = count($main_ip_pieces); if (trim($last_ip_piece) != "") { $last_piece = str_pad($last_ip_piece, 4, "0", STR_PAD_LEFT); // Build the full form of the IPV6 address considering the last IP block set for ($i = $size; $i < 7; $i++) { $main_ip_pieces[$i] = "0000"; } $main_ip_pieces[7] = $last_piece; } else { // Build the full form of the IPV6 address for ($i = $size; $i < 8; $i++) { $main_ip_pieces[$i] = "0000"; } } // Rebuild the final long form IPV6 address $final_ip = implode(":", $main_ip_pieces); return self::ip2long6($final_ip); } // Determine whether the IPV6 address is within range. // $ip is the IPV6 address in decimal format to check if its within the IP range created by the cloudflare IPV6 address, $range_ip. // $ip and $range_ip are converted to full IPV6 format. // Returns true if the IPV6 address, $ip, is within the range from $range_ip. False otherwise. public static function ipv6_in_range($ip, $range_ip) { $pieces = explode("/", $range_ip, 2); $left_piece = $pieces [0]; $right_piece = $pieces [1]; // Extract out the main IP pieces $ip_pieces = explode("::", $left_piece, 2); $main_ip_piece = $ip_pieces [0]; $last_ip_piece = $ip_pieces [1]; // Pad out the shorthand entries. $main_ip_pieces = explode(":", $main_ip_piece); foreach ($main_ip_pieces as $key => $val) { $main_ip_pieces [$key] = str_pad($main_ip_pieces [$key], 4, "0", STR_PAD_LEFT); } // Create the first and last pieces that will denote the IPV6 range. $first = $main_ip_pieces; $last = $main_ip_pieces; // Check to see if the last IP block (part after ::) is set $last_piece = ""; $size = count($main_ip_pieces); if (trim($last_ip_piece) != "") { $last_piece = str_pad($last_ip_piece, 4, "0", STR_PAD_LEFT); // Build the full form of the IPV6 address considering the last IP block set for ($i = $size; $i < 7; $i++) { $first [$i] = "0000"; $last [$i] = "ffff"; } $main_ip_pieces [7] = $last_piece; } else { // Build the full form of the IPV6 address for ($i = $size; $i < 8; $i++) { $first [$i] = "0000"; $last [$i] = "ffff"; } } // Rebuild the final long form IPV6 address $first = self::ip2long6(implode(":", $first)); $last = self::ip2long6(implode(":", $last)); $in_range = ($ip >= $first && $ip <= $last); return $in_range; } } ?>

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