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<?php
declare(strict_types=1);
/*
* This file is part of Badcow DNS Library.
*
* (c) Samuel Williams <sam@badcow.co>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Badcow\DNS\Rdata;
use Badcow\DNS\Parser\Tokens;
/**
* Class LocRdata.
*
* Mechanism to allow the DNS to carry location
* information about hosts, networks, and subnets.
*
* @see http://tools.ietf.org/html/rfc1876
*/
class LOC implements RdataInterface
{
use RdataTrait;
public const TYPE = 'LOC';
public const TYPE_CODE = 29;
public const LATITUDE = 'LATITUDE';
public const LONGITUDE = 'LONGITUDE';
public const FORMAT_DECIMAL = 'DECIMAL';
public const FORMAT_DMS = 'DMS';
/**
* @var float|null
*/
private $latitude;
/**
* @var float|null
*/
private $longitude;
/**
* @var float
*/
private $altitude = 0.0;
/**
* @var float
*/
private $size = 1.0;
/**
* @var float
*/
private $horizontalPrecision = 10000.0;
/**
* @var float
*/
private $verticalPrecision = 10.0;
public function setLatitude(float $latitude): void
{
$this->latitude = (float) $latitude;
}
/**
* @return float|string|null
*/
public function getLatitude(string $format = self::FORMAT_DECIMAL)
{
if (self::FORMAT_DMS === $format) {
return $this->toDms($this->latitude ?? 0, self::LATITUDE);
}
return $this->latitude;
}
public function setLongitude(float $longitude): void
{
$this->longitude = (float) $longitude;
}
/**
* @return float|string|null
*/
public function getLongitude(string $format = self::FORMAT_DECIMAL)
{
if (self::FORMAT_DMS === $format) {
return $this->toDms($this->longitude ?? 0, self::LONGITUDE);
}
return $this->longitude;
}
/**
* @throws \OutOfRangeException
*/
public function setAltitude(float $altitude): void
{
if ($altitude < -100000.00 || $altitude > 42849672.95) {
throw new \OutOfRangeException('The altitude must be on [-100000.00, 42849672.95].');
}
$this->altitude = (float) $altitude;
}
public function getAltitude(): float
{
return $this->altitude;
}
/**
* @throws \OutOfRangeException
*/
public function setHorizontalPrecision(float $horizontalPrecision): void
{
if ($horizontalPrecision < 0 || $horizontalPrecision > 9e9) {
throw new \OutOfRangeException('The horizontal precision must be on [0, 9e9].');
}
$this->horizontalPrecision = (float) $horizontalPrecision;
}
public function getHorizontalPrecision(): float
{
return $this->horizontalPrecision;
}
/**
* @throws \OutOfRangeException
*/
public function setSize(float $size): void
{
if ($size < 0 || $size > 9e9) {
throw new \OutOfRangeException('The size must be on [0, 9e9].');
}
$this->size = (float) $size;
}
public function getSize(): float
{
return $this->size;
}
/**
* @throws \OutOfRangeException
*/
public function setVerticalPrecision(float $verticalPrecision): void
{
if ($verticalPrecision < 0 || $verticalPrecision > 9e9) {
throw new \OutOfRangeException('The vertical precision must be on [0, 9e9].');
}
$this->verticalPrecision = $verticalPrecision;
}
public function getVerticalPrecision(): float
{
return $this->verticalPrecision;
}
public function toText(): string
{
return sprintf(
'%s %s %.2fm %.2fm %.2fm %.2fm',
$this->getLatitude(self::FORMAT_DMS),
$this->getLongitude(self::FORMAT_DMS),
$this->altitude,
$this->size,
$this->horizontalPrecision,
$this->verticalPrecision
);
}
/**
* Determine the degree minute seconds value from decimal.
*/
private function toDms(float $decimal, string $axis = self::LATITUDE): string
{
$d = (int) floor(abs($decimal));
$m = (int) floor((abs($decimal) - $d) * 60);
$s = ((abs($decimal) - $d) * 60 - $m) * 60;
if (self::LATITUDE === $axis) {
$h = ($decimal < 0) ? 'S' : 'N';
} else {
$h = ($decimal < 0) ? 'W' : 'E';
}
return sprintf('%d %d %.3f %s', $d, $m, $s, $h);
}
public function toWire(): string
{
return pack(
'CCCClll',
0,
self::numberToExponentValue($this->size),
self::numberToExponentValue($this->horizontalPrecision),
self::numberToExponentValue($this->verticalPrecision),
(int) floor($this->latitude * 3600000),
(int) floor($this->longitude * 3600000),
(int) floor($this->altitude)
);
}
private static function numberToExponentValue(float $num): int
{
$exponent = (int) floor(log($num, 10));
$base = (int) ceil($num / (10 ** $exponent));
return $base * 16 + $exponent;
}
private static function exponentValueToNumber(int $val): float
{
$base = ($val & 0b11110000) / 16;
$exponent = ($val & 0b00001111);
return $base * 10 ** $exponent;
}
/**
* Transform a DMS string to a decimal representation. Used for LOC records.
*
* @param int $deg Degrees
* @param int $min Minutes
* @param float $sec Seconds
* @param string $hemisphere Either 'N', 'S', 'E', or 'W'
*/
public static function dmsToDecimal(int $deg, int $min, float $sec, string $hemisphere): float
{
$multiplier = ('S' === $hemisphere || 'W' === $hemisphere) ? -1 : 1;
return $multiplier * ($deg + ($min / 60) + ($sec / 3600));
}
public function fromText(string $text): void
{
$rdata = explode(Tokens::SPACE, $text);
$lat = self::dmsToDecimal((int) array_shift($rdata), (int) array_shift($rdata), (float) array_shift($rdata), (string) array_shift($rdata));
$lon = self::dmsToDecimal((int) array_shift($rdata), (int) array_shift($rdata), (float) array_shift($rdata), (string) array_shift($rdata));
$this->setLatitude($lat);
$this->setLongitude($lon);
$this->setAltitude((float) array_shift($rdata));
$this->setSize((float) array_shift($rdata));
$this->setHorizontalPrecision((float) array_shift($rdata));
$this->setVerticalPrecision((float) array_shift($rdata));
}
/**
* @throws DecodeException
*/
public function fromWire(string $rdata, int &$offset = 0, ?int $rdLength = null): void
{
if (false === $values = unpack('C<version>/C<size>/C<hp>/C<vp>/l<lat>/l<lon>/l<alt>', $rdata, $offset)) {
throw new DecodeException(static::TYPE, $rdata);
}
$offset += 16;
$this->setSize(self::exponentValueToNumber($values['<size>']));
$this->setHorizontalPrecision(self::exponentValueToNumber($values['<hp>']));
$this->setVerticalPrecision(self::exponentValueToNumber($values['<vp>']));
$this->setLatitude($values['<lat>'] / 3600000);
$this->setLongitude($values['<lon>'] / 3600000);
$this->setAltitude($values['<alt>']);
}
}
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| A.php | File | 1.94 KB | 0644 |
|
| AAAA.php | File | 1.07 KB | 0644 |
|
| AFSDB.php | File | 2.2 KB | 0644 |
|
| APL.php | File | 4.12 KB | 0644 |
|
| CAA.php | File | 4.06 KB | 0644 |
|
| CDNSKEY.php | File | 450 B | 0644 |
|
| CDS.php | File | 431 B | 0644 |
|
| CERT.php | File | 5.49 KB | 0644 |
|
| CNAME.php | File | 1.33 KB | 0644 |
|
| CSYNC.php | File | 2.46 KB | 0644 |
|
| DHCID.php | File | 5.65 KB | 0644 |
|
| DLV.php | File | 455 B | 0644 |
|
| DNAME.php | File | 674 B | 0644 |
|
| DNSKEY.php | File | 1.02 KB | 0644 |
|
| DS.php | File | 3.93 KB | 0644 |
|
| DecodeException.php | File | 933 B | 0644 |
|
| Factory.php | File | 17.37 KB | 0644 |
|
| HINFO.php | File | 2.19 KB | 0644 |
|
| HIP.php | File | 4.4 KB | 0644 |
|
| IPSECKEY.php | File | 9.34 KB | 0644 |
|
| KEY.php | File | 3.25 KB | 0644 |
|
| KX.php | File | 2.45 KB | 0644 |
|
| LOC.php | File | 7.36 KB | 0644 |
|
| MX.php | File | 2.46 KB | 0644 |
|
| NAPTR.php | File | 7.06 KB | 0644 |
|
| NS.php | File | 442 B | 0644 |
|
| NSEC.php | File | 4.13 KB | 0644 |
|
| NSEC3.php | File | 8.09 KB | 0644 |
|
| NSEC3PARAM.php | File | 3.65 KB | 0644 |
|
| OPT.php | File | 2.79 KB | 0644 |
|
| PTR.php | File | 4.24 KB | 0644 |
|
| PolymorphicRdata.php | File | 2.02 KB | 0644 |
|
| RP.php | File | 1.82 KB | 0644 |
|
| RRSIG.php | File | 8.04 KB | 0644 |
|
| RdataInterface.php | File | 1.7 KB | 0644 |
|
| RdataTrait.php | File | 803 B | 0644 |
|
| SIG.php | File | 378 B | 0644 |
|
| SOA.php | File | 5.78 KB | 0644 |
|
| SPF.php | File | 432 B | 0644 |
|
| SRV.php | File | 4.61 KB | 0644 |
|
| SSHFP.php | File | 3.36 KB | 0644 |
|
| TA.php | File | 441 B | 0644 |
|
| TKEY.php | File | 7.41 KB | 0644 |
|
| TLSA.php | File | 4.69 KB | 0644 |
|
| TSIG.php | File | 6.5 KB | 0644 |
|
| TXT.php | File | 3.44 KB | 0644 |
|
| Types.php | File | 10.33 KB | 0644 |
|
| URI.php | File | 3.67 KB | 0644 |
|
| UnknownType.php | File | 2.2 KB | 0644 |
|
| UnsupportedTypeException.php | File | 477 B | 0644 |
|