IpHelper::getIpVersion() - Code Metrics - Inspection of "Fix phan issues and enable phan for Travis. (#12)" - yiisoft/network-utilities - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 58d5a3...886a7d )

by Alexander

created 2019-11-11 16:08 UTC

IpHelper::getIpVersion() B

↳ Parent: IpHelper

Complexity

Conditions	10
Paths	13

Size

Total Lines	21
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	14
CRAP Score	10.0296

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	10
eloc	14
c	1
b	0
f	0
nc	13
nop	2
dl	0
loc	21
ccs	14
cts	15
cp	0.9333
crap	10.0296
rs	7.6666

How to fix Complexity

<?php

namespace Yiisoft\NetworkUtilities;

class IpHelper
{
    public const IPV4 = 4;
    public const IPV6 = 6;

    /**
     * IPv4 address pattern. This pattern is PHP and JavaScript compatible.
     * Allows to define your own IP regexp eg. `'/^'.IpHelper::IPV4_PATTERN.'/(\d+)$/'`
     */
    public const IPV4_PATTERN = '((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])';
    /**
     * IPv6 address regexp. This regexp is PHP and Javascript compatible.
     */
    public const IPV4_REGEXP = '/^' . self::IPV4_PATTERN . '$/';
    /**
     * IPv6 address pattern. This pattern is PHP and Javascript compatible.
     * Allows to define your own IP regexp eg. `'/^'.IpHelper::IPV6_PATTERN.'/(\d+)$/'`
     */
    public const IPV6_PATTERN = '(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:' . self::IPV4_PATTERN . ')';
    /**
     * IPv6 address regexp. This regexp is PHP and JavaScript compatible.
     */
    public const IPV6_REGEXP = '/^' . self::IPV6_PATTERN . '$/';
    /**
     * The length of IPv6 address in bits
     */
    public const IPV6_ADDRESS_LENGTH = 128;
    /**
     * The length of IPv4 address in bits
     */
    public const IPV4_ADDRESS_LENGTH = 32;


    /**
     * Gets the IP version.
     *
     * @param string $ip the valid IPv4 or IPv6 address.
     * @param bool $validate enable perform IP address validation. False is best practice if the data comes from a trusted source.
     * @return int {{IPV4}} or {{IPV6}}
     */
    public static function getIpVersion(string $ip, bool $validate = true): int
    {
        $ipStringLength = strlen($ip);
        if ($ipStringLength < 2) {
            throw new \InvalidArgumentException("Unrecognized address $ip", 10);
        }
        $preIpVersion = strpos($ip, ':') === false ? self::IPV4 : self::IPV6;
        if ($preIpVersion === self::IPV4 && $ipStringLength < 7) {
            throw new \InvalidArgumentException("Unrecognized address $ip", 11);
        }
        if (!$validate) {
            return $preIpVersion;
        }
        $rawIp = @inet_pton($ip);
        if ($rawIp !== false) {
            return strlen($rawIp) === self::IPV4_ADDRESS_LENGTH >> 3 ? self::IPV4 : self::IPV6;
        }
        if ($preIpVersion === self::IPV6 && preg_match(self::IPV6_REGEXP, $ip) === 1) {
            return self::IPV6;
        }
        throw new \InvalidArgumentException("Unrecognized address $ip", 12);
    }

    /**
     * Checks whether IP address or subnet $subnet is contained by $subnet.
     *
     * For example, the following code checks whether subnet `192.168.1.0/24` is in subnet `192.168.0.0/22`:
     *
     * ```php
     * IpHelper::inRange('192.168.1.0/24', '192.168.0.0/22'); // true
     * ```
     *
     * In case you need to check whether a single IP address `192.168.1.21` is in the subnet `192.168.1.0/24`,
     * you can use any of theses examples:
     *
     * ```php
     * IpHelper::inRange('192.168.1.21', '192.168.1.0/24'); // true
     * IpHelper::inRange('192.168.1.21/32', '192.168.1.0/24'); // true
     * ```
     *
     * @param string $subnet the valid IPv4 or IPv6 address or CIDR range, e.g.: `10.0.0.0/8` or `2001:af::/64`
     * @param string $range the valid IPv4 or IPv6 CIDR range, e.g. `10.0.0.0/8` or `2001:af::/64`
     * @return bool whether $subnet is contained by $range
     *
     * @see https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing
     */
    public static function inRange(string $subnet, string $range): bool
    {
        [$ip, $mask] = array_pad(explode('/', $subnet), 2, null);
        [$net, $netMask] = array_pad(explode('/', $range), 2, null);

        assert(is_string($ip));
        assert(is_string($net));

        $ipVersion = static::getIpVersion($ip);
        $netVersion = static::getIpVersion($net);
        if ($ipVersion !== $netVersion) {
            return false;
        }

        $maxMask = $ipVersion === self::IPV4 ? self::IPV4_ADDRESS_LENGTH : self::IPV6_ADDRESS_LENGTH;
        $mask = $mask ?? $maxMask;
        $netMask = $netMask ?? $maxMask;

        $binIp = static::ip2bin($ip);
        $binNet = static::ip2bin($net);
        $masked = substr($binNet, 0, (int)$netMask);

        return ($masked === '' || strpos($binIp, $masked) === 0) && $mask >= $netMask;
    }

    /**
     * Expands an IPv6 address to it's full notation.
     *
     * For example `2001:db8::1` will be expanded to `2001:0db8:0000:0000:0000:0000:0000:0001`
     *
     * @param string $ip the original valid IPv6 address
     * @return string the expanded IPv6 address
     */
    public static function expandIPv6(string $ip): string
    {
        $ipRaw = @inet_pton($ip);
        if ($ipRaw === false) {
            if (@inet_pton('::1') === false) {
                throw new \RuntimeException('IPv6 is not supported by inet_pton()!');
            }
            throw new \InvalidArgumentException("Unrecognized address $ip");
        }
        $hex = unpack('H*hex', $ipRaw);
        return substr(preg_replace('/([a-f0-9]{4})/i', '$1:', $hex['hex']), 0, -1);
    }

    /**
     * Converts IP address to bits representation.
     *
     * @param string $ip the valid IPv4 or IPv6 address
     * @return string bits as a string
     */
    public static function ip2bin(string $ip): string
    {
        if (static::getIpVersion($ip) === self::IPV4) {
            $ipBinary = pack('N', ip2long($ip));
        } elseif (@inet_pton('::1') === false) {
            throw new \RuntimeException('IPv6 is not supported by inet_pton()!');
        } else {
            $ipBinary = inet_pton($ip);
        }

        assert(is_string($ipBinary));

        $result = '';
        for ($i = 0, $iMax = strlen($ipBinary); $i < $iMax; $i += 4) {
            $data = substr($ipBinary, $i, 4);
            if (!is_string($data)) {
                throw new \RuntimeException('An error occurred while converting IP address to bits representation.');
            }
            $result .= str_pad(decbin(unpack('N', $data)[1]), 32, '0', STR_PAD_LEFT);
        }
        return $result;
    }

    /**
     * Gets the bits from CIDR Notation.
     *
     * @param string $ip IP or IP with CIDR Notation (`127.0.0.1`, `2001:db8:a::123/64`)
     * @return int
     */
    public static function getCidrBits(string $ip): int
    {
        if (preg_match('/^(?<ip>.{2,}?)(?:\/(?<bits>-?\d+))?$/', $ip, $matches) === 0) {
            throw new \InvalidArgumentException("Unrecognized address $ip", 1);
        }
        $ipVersion = static::getIpVersion($matches['ip']);
        $maxBits = $ipVersion === self::IPV6 ? self::IPV6_ADDRESS_LENGTH : self::IPV4_ADDRESS_LENGTH;
        $bits = $matches['bits'] ?? null;
        if ($bits === null) {
            return $maxBits;
        }
        $bits = (int)$bits;
        if ($bits < 0) {
            throw new \InvalidArgumentException('The number of CIDR bits cannot be negative', 2);
        }
        if ($bits > $maxBits) {
            throw new \InvalidArgumentException("CIDR bits is greater than $bits", 3);
        }
        return $bits;
    }
}


1		<?php
2
3		namespace Yiisoft\NetworkUtilities;
4
5		class IpHelper
6		{
7		public const IPV4 = 4;
8		public const IPV6 = 6;
9
10		/**
11		* IPv4 address pattern. This pattern is PHP and JavaScript compatible.
12		* Allows to define your own IP regexp eg. `'/^'.IpHelper::IPV4_PATTERN.'/(\d+)$/'`
13		*/
14		public const IPV4_PATTERN = '((25[0-5]\|(2[0-4]\|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]\|(2[0-4]\|1{0,1}[0-9]){0,1}[0-9])';
15		/**
16		* IPv6 address regexp. This regexp is PHP and Javascript compatible.
17		*/
18		public const IPV4_REGEXP = '/^' . self::IPV4_PATTERN . '$/';
19		/**
20		* IPv6 address pattern. This pattern is PHP and Javascript compatible.
21		* Allows to define your own IP regexp eg. `'/^'.IpHelper::IPV6_PATTERN.'/(\d+)$/'`
22		*/
23		public const IPV6_PATTERN = '(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}\|([0-9a-fA-F]{1,4}:){1,7}:\|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}\|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}\|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}\|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}\|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}\|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})\|:((:[0-9a-fA-F]{1,4}){1,7}\|:)\|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}\|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]\|(2[0-4]\|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]\|(2[0-4]\|1{0,1}[0-9]){0,1}[0-9])\|([0-9a-fA-F]{1,4}:){1,4}:' . self::IPV4_PATTERN . ')';
24		/**
25		* IPv6 address regexp. This regexp is PHP and JavaScript compatible.
26		*/
27		public const IPV6_REGEXP = '/^' . self::IPV6_PATTERN . '$/';
28		/**
29		* The length of IPv6 address in bits
30		*/
31		public const IPV6_ADDRESS_LENGTH = 128;
32		/**
33		* The length of IPv4 address in bits
34		*/
35		public const IPV4_ADDRESS_LENGTH = 32;
36
37
38		/**
39		* Gets the IP version.
40		*
41		* @param string $ip the valid IPv4 or IPv6 address.
42		* @param bool $validate enable perform IP address validation. False is best practice if the data comes from a trusted source.
43		* @return int {{IPV4}} or {{IPV6}}
44		*/
45	52	public static function getIpVersion(string $ip, bool $validate = true): int
46		{
47	52	$ipStringLength = strlen($ip);
48	52	if ($ipStringLength < 2) {
49	4	throw new \InvalidArgumentException("Unrecognized address $ip", 10);
50		}
51	48	$preIpVersion = strpos($ip, ':') === false ? self::IPV4 : self::IPV6;
52	48	if ($preIpVersion === self::IPV4 && $ipStringLength < 7) {
53	1	throw new \InvalidArgumentException("Unrecognized address $ip", 11);
54		}
55	47	if (!$validate) {
56	9	return $preIpVersion;
57		}
58	38	$rawIp = @inet_pton($ip);
59	38	if ($rawIp !== false) {
60	33	return strlen($rawIp) === self::IPV4_ADDRESS_LENGTH >> 3 ? self::IPV4 : self::IPV6;
61		}
62	5	if ($preIpVersion === self::IPV6 && preg_match(self::IPV6_REGEXP, $ip) === 1) {
63		return self::IPV6;
64		}
65	5	throw new \InvalidArgumentException("Unrecognized address $ip", 12);
66		}
67
68		/**
69		* Checks whether IP address or subnet $subnet is contained by $subnet.
70		*
71		* For example, the following code checks whether subnet `192.168.1.0/24` is in subnet `192.168.0.0/22`:
72		*
73		* ```php
74		* IpHelper::inRange('192.168.1.0/24', '192.168.0.0/22'); // true
75		* ```
76		*
77		* In case you need to check whether a single IP address `192.168.1.21` is in the subnet `192.168.1.0/24`,
78		* you can use any of theses examples:
79		*
80		* ```php
81		* IpHelper::inRange('192.168.1.21', '192.168.1.0/24'); // true
82		* IpHelper::inRange('192.168.1.21/32', '192.168.1.0/24'); // true
83		* ```
84		*
85		* @param string $subnet the valid IPv4 or IPv6 address or CIDR range, e.g.: `10.0.0.0/8` or `2001:af::/64`
86		* @param string $range the valid IPv4 or IPv6 CIDR range, e.g. `10.0.0.0/8` or `2001:af::/64`
87		* @return bool whether $subnet is contained by $range
88		*
89		* @see https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing
90		*/
91	10	public static function inRange(string $subnet, string $range): bool
92		{
93	10	[$ip, $mask] = array_pad(explode('/', $subnet), 2, null);
94	10	[$net, $netMask] = array_pad(explode('/', $range), 2, null);
95
96	10	assert(is_string($ip));
97	10	assert(is_string($net));
98
99	10	$ipVersion = static::getIpVersion($ip);
100	10	$netVersion = static::getIpVersion($net);
101	10	if ($ipVersion !== $netVersion) {
102		return false;
103		}
104
105	10	$maxMask = $ipVersion === self::IPV4 ? self::IPV4_ADDRESS_LENGTH : self::IPV6_ADDRESS_LENGTH;
106	10	$mask = $mask ?? $maxMask;
107	10	$netMask = $netMask ?? $maxMask;
108
109	10	$binIp = static::ip2bin($ip);
110	10	$binNet = static::ip2bin($net);
111	10	$masked = substr($binNet, 0, (int)$netMask);
112
113	10	return ($masked === '' \|\| strpos($binIp, $masked) === 0) && $mask >= $netMask;
114		}
115
116		/**
117		* Expands an IPv6 address to it's full notation.
118		*
119		* For example `2001:db8::1` will be expanded to `2001:0db8:0000:0000:0000:0000:0000:0001`
120		*
121		* @param string $ip the original valid IPv6 address
122		* @return string the expanded IPv6 address
123		*/
124	3	public static function expandIPv6(string $ip): string
125		{
126	3	$ipRaw = @inet_pton($ip);
127	3	if ($ipRaw === false) {
128	1	if (@inet_pton('::1') === false) {
129		throw new \RuntimeException('IPv6 is not supported by inet_pton()!');
130		}
131	1	throw new \InvalidArgumentException("Unrecognized address $ip");
132		}
133	2	$hex = unpack('H*hex', $ipRaw);
134	2	return substr(preg_replace('/([a-f0-9]{4})/i', '$1:', $hex['hex']), 0, -1);
135		}
136
137		/**
138		* Converts IP address to bits representation.
139		*
140		* @param string $ip the valid IPv4 or IPv6 address
141		* @return string bits as a string
142		*/
143	14	public static function ip2bin(string $ip): string
144		{
145	14	if (static::getIpVersion($ip) === self::IPV4) {
146	7	$ipBinary = pack('N', ip2long($ip));
147	7	} elseif (@inet_pton('::1') === false) {
148		throw new \RuntimeException('IPv6 is not supported by inet_pton()!');
149		} else {
150	7	$ipBinary = inet_pton($ip);
151		}
152
153	14	assert(is_string($ipBinary));
154
155	14	$result = '';
156	14	for ($i = 0, $iMax = strlen($ipBinary); $i < $iMax; $i += 4) {
157	14	$data = substr($ipBinary, $i, 4);
158	14	if (!is_string($data)) {
159		throw new \RuntimeException('An error occurred while converting IP address to bits representation.');
160		}
161	14	$result .= str_pad(decbin(unpack('N', $data)[1]), 32, '0', STR_PAD_LEFT);
162		}
163	14	return $result;
164		}
165
166		/**
167		* Gets the bits from CIDR Notation.
168		*
169		* @param string $ip IP or IP with CIDR Notation (`127.0.0.1`, `2001:db8:a::123/64`)
170		* @return int
171		*/
172	19	public static function getCidrBits(string $ip): int
173		{
174	19	if (preg_match('/^(?<ip>.{2,}?)(?:\/(?<bits>-?\d+))?$/', $ip, $matches) === 0) {
175	2	throw new \InvalidArgumentException("Unrecognized address $ip", 1);
176		}
177	17	$ipVersion = static::getIpVersion($matches['ip']);
178	15	$maxBits = $ipVersion === self::IPV6 ? self::IPV6_ADDRESS_LENGTH : self::IPV4_ADDRESS_LENGTH;
179	15	$bits = $matches['bits'] ?? null;
180	15	if ($bits === null) {
181	3	return $maxBits;
182		}
183	12	$bits = (int)$bits;
184	12	if ($bits < 0) {
185	2	throw new \InvalidArgumentException('The number of CIDR bits cannot be negative', 2);
186		}
187	10	if ($bits > $maxBits) {
188	2	throw new \InvalidArgumentException("CIDR bits is greater than $bits", 3);
189		}
190	8	return $bits;
191		}
192		}
193

yiisoft / network-utilities

Push — master ( 58d5a3...886a7d )

IpHelper::getIpVersion() B

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