/upload/plugins/slug/function.iplocation.php

<?php
/**
 *      [PHPB2B] Copyright (C) 2007-2099, Ualink Inc. All Rights Reserved.
 *      The contents of this file are subject to the License; you may not use this file except in compliance with the License. 
 *		Thanks_For_Discuz!
 *      @version $Revision: 2053 $
 */
function smarty_function_iplocation($params) {

	$return = '';
	extract($params);
	if(preg_match("/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/", $ip)) {

		$iparray = explode('.', $ip);

		if($iparray[0] == 10 || $iparray[0] == 127 || ($iparray[0] == 192 && $iparray[1] == 168) || ($iparray[0] == 172 && ($iparray[1] >= 16 && $iparray[1] <= 31))) {
			$return = '- LAN';
		} elseif($iparray[0] > 255 || $iparray[1] > 255 || $iparray[2] > 255 || $iparray[3] > 255) {
			$return = '- Invalid IP Address';
		} else {
			$tinyipfile = DATA_PATH. 'ipdata/tiny.dat';
			$fullipfile = DATA_PATH. 'ipdata/qqwry.dat';
			if(@file_exists($tinyipfile)) {
				$return = convertip_tiny($ip, $tinyipfile);
			} elseif(@file_exists($fullipfile)) {
				$return = convertip_full($ip, $fullipfile);
			}
		}
	}

	return $return;

}

function convertip_tiny($ip, $ipdatafile) {

	static $fp = NULL, $offset = array(), $index = NULL;

	$ipdot = explode('.', $ip);
	$ip    = pack('N', ip2long($ip));

	$ipdot[0] = (int)$ipdot[0];
	$ipdot[1] = (int)$ipdot[1];

	if($fp === NULL && $fp = @fopen($ipdatafile, 'rb')) {
		$offset = @unpack('Nlen', @fread($fp, 4));
		$index  = @fread($fp, $offset['len'] - 4);
	} elseif($fp == FALSE) {
		return  '- Invalid IP data file';
	}

	$length = $offset['len'] - 1028;
	$start  = @unpack('Vlen', $index[$ipdot[0] * 4] . $index[$ipdot[0] * 4 + 1] . $index[$ipdot[0] * 4 + 2] . $index[$ipdot[0] * 4 + 3]);

	for ($start = $start['len'] * 8 + 1024; $start < $length; $start += 8) {

		if ($index{$start} . $index{$start + 1} . $index{$start + 2} . $index{$start + 3} >= $ip) {
			$index_offset = @unpack('Vlen', $index{$start + 4} . $index{$start + 5} . $index{$start + 6} . "\x0");
			$index_length = @unpack('Clen', $index{$start + 7});
			break;
		}
	}

	@fseek($fp, $offset['len'] + $index_offset['len'] - 1024);
	if($index_length['len']) {
		return '- '.@fread($fp, $index_length['len']);
	} else {
		return '- Unknown';
	}

}

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;

}
?>