/**
* @param string $address
*
* @throws RdataException
*/
public function setAddress($address)
{
if (!Validator::validateIpv6Address($address)) {
throw new RdataException(sprintf('Address "%s" is not a valid IPv6 address', $address));
}
$this->address = $address;
}
/**
* Expands an IPv6 address to its full, non-short hand representation.
*
* @param $ip
* @throws \InvalidArgumentException
*
* @return string
*/
public static function expandIpv6($ip)
{
if (!Validator::validateIpv6Address($ip)) {
throw new \InvalidArgumentException(sprintf('"%s" is not a valid IPv6 address.', $ip));
}
$hex = unpack('H*hex', inet_pton($ip));
$ip = substr(preg_replace('/([A-f0-9]{4})/', '$1:', $hex['hex']), 0, -1);
return $ip;
}
/**
* Takes a valid IPv6 address and contracts it
* to its shorter version.
*
* E.g.: 2001:0000:0000:acad:0000:0000:0000:0001 -> 2001:0:0:acad::1
*
* Note: If there is more than one set of consecutive hextets, the function
* will favour the larger of the sets. If both sets of zeroes are the same
* the second will be favoured in the omission of zeroes.
*
* E.g.: 2001:0000:0000:ab80:2390:0000:0000:000a -> 2001:0:0:ab80:2390::a
*
* @param string $ip IPv6 address
* @throws \InvalidArgumentException
*
* @return string Contracted IPv6 address
*/
public static function contractIpv6($ip)
{
if (!Validator::validateIpv6Address($ip)) {
throw new \InvalidArgumentException(sprintf('"%s" is not a valid IPv6 address.', $ip));
}
$ip = self::expandIpv6($ip);
$decimals = array_map('hexdec', explode(':', $ip));
//Find the larget streak of zeroes
$streak = $longestStreak = 0;
$streak_i = $longestStreak_i = -1;
foreach ($decimals as $i => $decimal) {
if (0 !== $decimal) {
$streak_i = -1;
$streak = 0;
continue;
}
$streak_i = $streak_i === -1 ? $i : $streak_i;
$streak += 1;
if ($streak >= $longestStreak) {
$longestStreak = $streak;
$longestStreak_i = $streak_i;
}
}
$ip = '';
foreach ($decimals as $i => $decimal) {
if ($i > $longestStreak_i && $i < $longestStreak_i + $longestStreak) {
continue;
}
if ($i === $longestStreak_i) {
$ip .= '::';
continue;
}
$ip .= (string) dechex($decimal);
$ip .= $i < 7 ? ':' : '';
}
return preg_replace('/\\:{3}/', '::', $ip);
}
public function testValidateIpv6Address()
{
$valid1 = '2001:0db8:0000:0000:0000:ff00:0042:8329';
$valid2 = '2001:db8:0:0:0:ff00:42:8329';
$valid3 = '2001:db8::ff00:42:8329';
$valid4 = '::1';
$invalid1 = 'fffff:0db8:0000:0000:0000:ff00:0042:8329';
$invalid2 = '172.10.255.1';
$invalid3 = '192.168.0.0';
$this->assertTrue(Validator::validateIpv6Address($valid1));
$this->assertTrue(Validator::validateIpv6Address($valid2));
$this->assertTrue(Validator::validateIpv6Address($valid3));
$this->assertTrue(Validator::validateIpv6Address($valid4));
$this->assertFalse(Validator::validateIpv6Address($invalid1));
$this->assertFalse(Validator::validateIpv6Address($invalid2));
$this->assertFalse(Validator::validateIpv6Address($invalid3));
}
