mirror of https://github.com/dnomd343/echoIP
Dnomd343
4 years ago
4 changed files with 177 additions and 8 deletions
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<?php |
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class IpLocation { |
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private $fp; // 文件指针 |
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private $firstip; // 第一条记录的偏移地址 |
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private $lastip; // 最后一条记录的偏移地址 |
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private $totalip; // 总记录条数 |
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public function __construct() { // 构造函数 |
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$this->fp = 0; |
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if (($this->fp = fopen(__DIR__.'/qqwry.dat', 'rb')) !== false) { |
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$this->firstip = $this->getlong(); |
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$this->lastip = $this->getlong(); |
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$this->totalip = ($this->lastip - $this->firstip) / 7; |
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} |
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} |
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public function __destruct() { // 析构函数 |
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if ($this->fp) { |
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fclose($this->fp); |
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} |
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$this->fp = 0; |
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} |
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public function getDetail($ip) { // 获取IP地址区段及所在位置 |
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if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) { // 判断IP是否有效 |
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return null; |
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} |
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$location = $this->getLocation($ip); |
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if (!$location) { |
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return null; |
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} |
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$detail['cidr'] = $location['beginip'] . ' - ' . $location['endip']; |
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$detail['addr'] = $location['country'] . $location['area']; |
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return $detail; |
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} |
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private function getlong() { // 将读取的4字节转化为长整型数 |
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return unpack('Vlong', fread($this->fp, 4))['long']; |
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} |
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private function getlong3() { // 将读取的3字节转化为长整型数 |
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return unpack('Vlong', fread($this->fp, 3) . chr(0))['long']; |
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} |
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private function ip2long($ip) { // 将IP地址转为数字地址 |
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$ip_arr = explode('.', $ip); |
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return (16777216 * intval($ip_arr[0])) + (65536 * intval($ip_arr[1])) + (256 * intval($ip_arr[2])) + intval($ip_arr[3]); |
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} |
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private function packip($ip) { // 计算压缩后的IP地址 |
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return pack('N', intval($this->ip2long($ip))); |
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} |
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private function getstring($data = "") { // 读取字符串 |
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$char = fread($this->fp, 1); |
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while (ord($char) > 0) { // 字符串读取到\0结束 |
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$data .= $char; |
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$char = fread($this->fp, 1); |
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} |
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return $data; |
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} |
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private function getArea() { // 获取地区信息 |
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$flag = fread($this->fp, 1); // 标志字节 |
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if (ord($flag) == 0) { // 无区域信息 |
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return ''; |
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} else if (ord($flag) == 1 || ord($flag) == 2) { // 区域信息被重定向 |
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fseek($this->fp, $this->getlong3()); |
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return $this->getstring(); |
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} else { // 区域信息未被重定向 |
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return $this->getstring($flag); |
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} |
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} |
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private function getLocation($ip) { // 根据IP地址返回地区信息 |
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$ip = $this->packip($ip); |
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$l = 0; // 搜索下边界 |
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$u = $this->totalip; // 搜索上边界 |
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$findip = $this->lastip; // 若未找到则返回最后一条记录 |
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while ($l <= $u) { // 发起查找 |
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$i = floor(($l + $u) / 2); // 计算二分点 |
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fseek($this->fp, $this->firstip + $i * 7); |
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$beginip = strrev(fread($this->fp, 4)); // 获取二分点所在区域的下边界 |
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if ($ip < $beginip) { // 目标IP小于二分区域的下边界 |
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$u = $i - 1; // 搜索的上边界缩小到二分点以下 |
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} else { // 目标IP大于或等于二分区域的下边界 |
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fseek($this->fp, $this->getlong3()); |
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$endip = strrev(fread($this->fp, 4)); // 获取二分区域的上边界 |
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if ($ip > $endip) { // 目标IP大于二分区域的上边界 |
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$l = $i + 1; // 搜索的下边界缩小到二分点以上 |
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} else { // 目标IP在二分区域内 |
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$findip = $this->firstip + $i * 7; |
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break; |
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} |
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} |
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} |
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fseek($this->fp, $findip); |
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$location['beginip'] = long2ip($this->getlong()); // 目标IP所在区域的下边界 |
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$offset = $this->getlong3(); |
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fseek($this->fp, $offset); |
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$location['endip'] = long2ip($this->getlong()); // 目标IP所在区域的上边界 |
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//获取目标IP的位置信息 |
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$byte = fread($this->fp, 1); // 标志字节 |
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switch (ord($byte)) { |
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case 1: // 国家和区域信息均被重定向 |
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$countryOffset = $this->getlong3(); // 重定向地址 |
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fseek($this->fp, $countryOffset); |
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$byte = fread($this->fp, 1); // 标志字节 |
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switch (ord($byte)) { |
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case 2: // 国家信息被重定向 |
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fseek($this->fp, $this->getlong3()); |
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$location['country'] = $this->getstring(); |
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fseek($this->fp, $countryOffset + 4); |
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$location['area'] = $this->getArea(); |
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break; |
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default: // 国家信息未被重定向 |
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$location['country'] = $this->getstring($byte); |
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$location['area'] = $this->getArea(); |
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break; |
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} |
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break; |
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case 2: // 国家信息被重定向 |
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fseek($this->fp, $this->getlong3()); |
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$location['country'] = $this->getstring(); |
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fseek($this->fp, $offset + 8); |
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$location['area'] = $this->getArea(); |
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break; |
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default: // 国家信息未被重定向 |
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$location['country'] = $this->getstring($byte); |
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$location['area'] = $this->getArea(); |
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break; |
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} |
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// 转为UTF-8编码 |
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$location['country'] = iconv("GBK", "UTF-8", $location['country']); |
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$location['area'] = iconv("GBK", "UTF-8", $location['area']); |
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// 去除附带信息 |
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if ($location['country'] == " CZ88.NET" || $location['country'] == "纯真网络") { |
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$location['country'] = "Unknow"; |
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} |
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if ($location['area'] == " CZ88.NET") { |
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$location['area'] = ""; |
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} |
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return $location; |
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} |
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} |
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