diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 0b747058f7..ac3641ae17 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -3343,10 +3343,65 @@ function phpbb_ip_normalise($address)
 *
 * @return mixed		false on failure,
 *					string otherwise
+*
+* @author APTX
 */
 function phpbb_inet_ntop($in_addr)
 {
-	return inet_ntop($in_addr);
+	$in_addr = bin2hex($in_addr);
+
+	switch (strlen($in_addr))
+	{
+		case 8:
+			return implode('.', array_map('hexdec', str_split($in_addr, 2)));
+
+		case 32:
+			if (substr($in_addr, 0, 24) === '00000000000000000000ffff')
+			{
+				return phpbb_inet_ntop(pack('H*', substr($in_addr, 24)));
+			}
+
+			$parts = str_split($in_addr, 4);
+			$parts = preg_replace('/^0+(?!$)/', '', $parts);
+			$ret = implode(':', $parts);
+
+			$matches = array();
+			preg_match_all('/(?<=:|^)(?::?0){2,}/', $ret, $matches, PREG_OFFSET_CAPTURE);
+			$matches = $matches[0];
+
+			if (empty($matches))
+			{
+				return $ret;
+			}
+
+			$longest_match = '';
+			$longest_match_offset = 0;
+			foreach ($matches as $match)
+			{
+				if (strlen($match[0]) > strlen($longest_match))
+				{
+					$longest_match = $match[0];
+					$longest_match_offset = $match[1];
+				}
+			}
+
+			$ret = substr_replace($ret, '', $longest_match_offset, strlen($longest_match));
+
+			if ($longest_match_offset == strlen($ret))
+			{
+				$ret .= ':';
+			}
+
+			if ($longest_match_offset == 0)
+			{
+				$ret = ':' . $ret;
+			}
+
+			return $ret;
+
+		default:
+			return false;
+	}
 }
 
 /**
@@ -3358,10 +3413,71 @@ function phpbb_inet_ntop($in_addr)
 * @param string $address	A human readable IPv4 or IPv6 address.
 *
 * @return string	in_addr representation of the given address
+*
+* @author APTX
 */
 function phpbb_inet_pton($address)
 {
-	return inet_pton($address);
+	$ret = '';
+	if (preg_match(get_preg_expression('ipv4'), $address))
+	{
+		foreach (explode('.', $address) as $part)
+		{
+			$ret .= ($part <= 0xF ? '0' : '') . dechex($part);
+		}
+
+		return pack('H*', $ret);
+	}
+
+	if (preg_match(get_preg_expression('ipv6'), $address))
+	{
+		$parts = explode(':', $address);
+		$missing_parts = 8 - sizeof($parts) + 1;
+
+		if (substr($address, 0, 2) === '::')
+		{
+			++$missing_parts;
+		}
+
+		if (substr($address, -2) === '::')
+		{
+			++$missing_parts;
+		}
+
+		$embedded_ipv4 = false;
+		$last_part = end($parts);
+
+		if (preg_match(get_preg_expression('ipv4'), $last_part))
+		{
+			$parts[sizeof($parts) - 1] = '';
+			$last_part = phpbb_inet_pton($last_part);
+			$embedded_ipv4 = true;
+			--$missing_parts;
+		}
+
+		foreach ($parts as $i => $part)
+		{
+			if (strlen($part))
+			{
+				$ret .= str_pad($part, 4, '0', STR_PAD_LEFT);
+			}
+			else if ($i && $i < sizeof($parts) - 1)
+			{
+				$ret .= str_repeat('0000', $missing_parts);
+			}
+		}
+
+		$ret = pack('H*', $ret);
+
+		if ($embedded_ipv4)
+		{
+			$ret .= $last_part;
+		}
+
+		return $ret;
+	}
+
+	return false;
 }
 
 /**
diff --git a/tests/network/inet_ntop_pton.php b/tests/network/inet_ntop_pton.php
index 47fa0552da..4cea6cfa3a 100644
--- a/tests/network/inet_ntop_pton.php
+++ b/tests/network/inet_ntop_pton.php
@@ -15,12 +15,25 @@ class phpbb_network_inet_ntop_pton_test extends phpbb_test_case
 	public function data_provider()
 	{
 		return array(
-			array('127.0.0.1',			'7f000001'),
-			array('192.232.131.223',	'c0e883df'),
+			array('127.0.0.1',						'7f000001'),
+			array('192.232.131.223',				'c0e883df'),
+			array('13.1.68.3',						'0d014403'),
+			array('129.144.52.38',					'81903426'),
 
-			array('::1',						'00000000000000000000000000000001'),
-			array('2001:280:0:10::5',			'20010280000000100000000000000005'),
-			array('fe80::200:4cff:fefe:172f',	'fe8000000000000002004cfffefe172f'),
+			array('2001:280:0:10::5',				'20010280000000100000000000000005'),
+			array('fe80::200:4cff:fefe:172f',		'fe8000000000000002004cfffefe172f'),
+
+			array('::',								'00000000000000000000000000000000'),
+			array('::1',							'00000000000000000000000000000001'),
+			array('1::',							'00010000000000000000000000000000'),
+
+			array('1:1:0:0:1::',					'00010001000000000001000000000000'),
+
+			array('0:2:3:4:5:6:7:8',				'00000002000300040005000600070008'),
+			array('1:2:0:4:5:6:7:8',				'00010002000000040005000600070008'),
+			array('1:2:3:4:5:6:7:0',				'00010002000300040005000600070000'),
+
+			array('2001:0:0:1::1',					'20010000000000010000000000000001'),
 		);
 	}