选择语言 :

 Core_IpSource::_convertip_full

null Core_IpSource::_convertip_full( )
File: ./core/classes/ipsource.class.php
protected static function _convertip_full($ip, $ipdatafile)
{

    if ( !$fd = @fopen($ipdatafile, 'rb') )
    {
        return 'Invalid IP data file';
    }

    $ip = explode('.', $ip);
    $ipNum = $ip[0] * 16777216 + $ip[1] * 65536 + $ip[2] * 256 + $ip[3];

    if ( !($DataBegin = fread($fd, 4)) || !($DataEnd = fread($fd, 4)) ) return;
    @$ipbegin = implode('', unpack('L', $DataBegin));
    if ( $ipbegin < 0 ) $ipbegin += pow(2, 32);
    @$ipend = implode('', unpack('L', $DataEnd));
    if ( $ipend < 0 ) $ipend += pow(2, 32);
    $ipAllNum = ($ipend - $ipbegin) / 7 + 1;

    $BeginNum = $ip2num = $ip1num = 0;
    $ipAddr1 = $ipAddr2 = '';
    $EndNum = $ipAllNum;

    while ( $ip1num > $ipNum || $ip2num < $ipNum )
    {
        $Middle = intval(($EndNum + $BeginNum) / 2);

        fseek($fd, $ipbegin + 7 * $Middle);
        $ipData1 = fread($fd, 4);
        if (strlen($ipData1) < 4)
        {
            fclose($fd);
            return 'System Error';
        }
        $ip1num = implode('', unpack('L', $ipData1));
        if ( $ip1num < 0 ) $ip1num += pow(2, 32);

        if ( $ip1num > $ipNum )
        {
            $EndNum = $Middle;
            continue;
        }

        $DataSeek = fread($fd, 3);
        if ( strlen($DataSeek) < 3 )
        {
            fclose($fd);
            return 'System Error';
        }
        $DataSeek = implode('', unpack('L', $DataSeek . chr(0)));
        fseek($fd, $DataSeek);
        $ipData2 = fread($fd, 4);
        if ( strlen($ipData2) < 4 )
        {
            fclose($fd);
            return 'System Error';
        }
        $ip2num = implode('', unpack('L', $ipData2));
        if ( $ip2num < 0 ) $ip2num += pow(2, 32);

        if ( $ip2num < $ipNum )
        {
            if ( $Middle == $BeginNum )
            {
                fclose($fd);
                return 'Unknown';
            }
            $BeginNum = $Middle;
        }
    }

    $ipFlag = fread($fd, 1);
    if ( $ipFlag == chr(1) )
    {
        $ipSeek = fread($fd, 3);
        if ( strlen($ipSeek) < 3 )
        {
            fclose($fd);
            return 'System Error';
        }
        $ipSeek = implode('', unpack('L', $ipSeek . chr(0)));
        fseek($fd, $ipSeek);
        $ipFlag = fread($fd, 1);
    }

    if ( $ipFlag == chr(2) )
    {
        $AddrSeek = fread($fd, 3);
        if ( strlen($AddrSeek) < 3 )
        {
            fclose($fd);
            return '- System Error';
        }
        $ipFlag = fread($fd, 1);
        if ( $ipFlag == chr(2) )
        {
            $AddrSeek2 = fread($fd, 3);
            if ( strlen($AddrSeek2) < 3 )
            {
                fclose($fd);
                return 'System Error';
            }
            $AddrSeek2 = implode('', unpack('L', $AddrSeek2 . chr(0)));
            fseek($fd, $AddrSeek2);
        }
        else
        {
            fseek($fd, - 1, SEEK_CUR);
        }

        while ( ($char = fread($fd, 1)) != chr(0) )
            $ipAddr2 .= $char;

        $AddrSeek = implode('', unpack('L', $AddrSeek . chr(0)));
        fseek($fd, $AddrSeek);

        while ( ($char = fread($fd, 1)) != chr(0) )
            $ipAddr1 .= $char;
    }
    else
    {
        fseek($fd, - 1, SEEK_CUR);
        while ( ($char = fread($fd, 1)) != chr(0) )
            $ipAddr1 .= $char;

        $ipFlag = fread($fd, 1);
        if ( $ipFlag == chr(2) )
        {
            $AddrSeek2 = fread($fd, 3);
            if ( strlen($AddrSeek2) < 3 )
            {
                fclose($fd);
                return 'System Error';
            }
            $AddrSeek2 = implode('', unpack('L', $AddrSeek2 . chr(0)));
            fseek($fd, $AddrSeek2);
        }
        else
        {
            fseek($fd, - 1, SEEK_CUR);
        }
        while ( ($char = fread($fd, 1)) != chr(0) )
            $ipAddr2 .= $char;
    }
    fclose($fd);

    if ( preg_match('/http/i', $ipAddr2) )
    {
        $ipAddr2 = '';
    }
    $ipaddr = "$ipAddr1 $ipAddr2";
    $ipaddr = preg_replace('/CZ88\.NET/is', '', $ipaddr);
    $ipaddr = preg_replace('/^\s*/is', '', $ipaddr);
    $ipaddr = preg_replace('/\s*$/is', '', $ipaddr);
    if ( preg_match('/http/i', $ipaddr) || $ipaddr == '' )
    {
        $ipaddr = 'Unknown';
    }

    return $ipaddr;

}