ip.php ➔ checkIp6() - Code Metrics - Inspection of "1.2.0 - 2016-08-22" - padosoft/support - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 5f0ee2...6f3a7a )

by Lorenzo

created 2016-08-22 20:35 UTC

ip.php ➔ checkIp6() C

↳ Parent: Project

Complexity

Conditions	12
Paths	14

Size

Total Lines	29
Code Lines	21

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	12
eloc	21
c	0
b	0
f	0
nc	14
nop	2
dl	0
loc	29
rs	5.1612

How to fix Complexity

<?php

/**
 * get Client IP. DEPRECATED! use getClientIP().
 * @param array $server
 * @return string
 * @deprecated
 * @see getClientIp();
 */
function getIPVisitor(array $server = []) : string
{
    $IP2Check = '';
    if (array_key_exists('HTTP_X_FORWARDED_FOR', $server) && trim($server['HTTP_X_FORWARDED_FOR']) != '') {
        $IP2Check = $server['HTTP_X_FORWARDED_FOR'];
    } elseif (array_key_exists('REMOTE_ADDR', $server) && trim($server['REMOTE_ADDR'])) {
        $IP2Check = $server['REMOTE_ADDR'];
    }

    if (strpos($IP2Check, ',') === false) {
        return $IP2Check;
    }

    // Header can contain multiple IP-s of proxies that are passed through.
    // Only the IP added by the last proxy (last IP in the list) can be trusted.
    $arrIps = explode(',', $IP2Check);
    if (!is_array($arrIps) || count($arrIps) < 1) {
        return '';
    }

    return trim(head($arrIps));
}

/**
 * anonimizeIp masquerade last 3 digit of IP address
 * @param  string $ip
 * @return string  masked IP
 */
function anonimizeIp(string $ip) : string
{
    if ($ip === null || strlen($ip) < 2 || strrpos($ip, ".") === false) {
        return $ip;
    }
    return substr($ip, 0, strrpos($ip, ".") + 1) . '0';
}

/**
 * getHost Get the Internet host name corresponding to a given IP address
 * @param  string $ip the IP to resolve.
 * @return string    Returns the host name of the Internet host specified by ip_address on success,
 *                   the unmodified ip_address on failure,
 *                   or FALSE on malformed input.
 */
function getHost($ip)
{
    return gethostbyaddr($ip);
}

/**
 * Returns the client IP addresses.
 *
 * In the returned array the most trusted IP address is first, and the
 * least trusted one last. The "real" client IP address is the last one,
 * but this is also the least trusted one.
 * Trusted proxies are stripped if passed.
 *
 * Use this method carefully; you should use getClientIp() instead.
 *
 * @param array $server
 * @param array $trustedProxies
 *
 * @return array The client IP addresses
 *
 * @see getClientIp()
 * @see https://github.com/symfony/symfony/blob/0b39ce23150c34c990e3eccfae4e375161c0d352/src/Symfony/Component/HttpFoundation/Request.php#L831
 */
function getClientIps(array $server, array $trustedProxies = []) : array
{
    if (empty($server)) {
        return [''];
    }
    $clientIps = array();
    $ip = $server['REMOTE_ADDR'];
    if (!isFromTrustedProxy($trustedProxies, $ip)) {
        return array($ip);
    }
    if (array_key_exists('FORWARDED', $server) && trim($server['FORWARDED']) != '') {
        $forwardedHeader = $server['FORWARDED'];
        preg_match_all('{(for)=("?\[?)([a-z0-9\.:_\-/]*)}', $forwardedHeader, $matches);
        $clientIps = $matches[3];
    } elseif (array_key_exists('X_FORWARDED_FOR', $server) && trim($server['X_FORWARDED_FOR']) != '') {
        $clientIps = array_map('trim', explode(',', $server['X_FORWARDED_FOR']));
    }
    $clientIps[] = $ip; // Complete the IP chain with the IP the request actually came from
    $ip = $clientIps[0]; // Fallback to this when the client IP falls into the range of trusted proxies
    foreach ($clientIps as $key => $clientIp) {
        // Remove port (unfortunately, it does happen)
        if (preg_match('{((?:\d+\.){3}\d+)\:\d+}', $clientIp, $match)) {
            $clientIps[$key] = $clientIp = $match[1];
        }
        if (checkIp($clientIp, $trustedProxies)) {
            unset($clientIps[$key]);
        }
    }
    // Now the IP chain contains only untrusted proxies and the client IP
    return $clientIps ? array_reverse($clientIps) : array($ip);
}

/**
 * Returns the client IP address.
 *
 * This method can read the client IP address from the "X-Forwarded-For" header
 * when trusted proxies were set via "setTrustedProxies()". The "X-Forwarded-For"
 * header value is a comma+space separated list of IP addresses, the left-most
 * being the original client, and each successive proxy that passed the request
 * adding the IP address where it received the request from.
 *
 * If your reverse proxy uses a different header name than "X-Forwarded-For",
 * ("Client-Ip" for instance), configure it via "setTrustedHeaderName()" with
 * the "client-ip" key.
 *
 * @param array $server
 * @param array $trustedProxies
 *
 * @return string The client IP address
 *
 * @see getClientIps()
 * @see https://github.com/symfony/symfony/blob/0b39ce23150c34c990e3eccfae4e375161c0d352/src/Symfony/Component/HttpFoundation/Request.php#L886
 * @see http://en.wikipedia.org/wiki/X-Forwarded-For
 *
 */
function getClientIp(array $server, array $trustedProxies = []) : string
{
    $ipAddresses = getClientIps($server, $trustedProxies);
    return $ipAddresses[0];
}

/**
 * Checks if an IPv4 or IPv6 address is contained in the list of given IPs or subnets.
 *
 * @param string $requestIp IP to check
 * @param string|array $ips List of IPs or subnets (can be a string if only a single one)
 *
 * @return bool Whether the IP is valid
 * @see https://github.com/symfony/http-foundation/blob/master/IpUtils.php
 */
function checkIp($requestIp, $ips) : bool
{
    if (empty($ips)) {
        return false;
    }
    if (!is_array($ips)) {
        $ips = array($ips);
    }
    $method = substr_count($requestIp, ':') > 1 ? 'checkIp6' : 'checkIp4';
    foreach ($ips as $ip) {
        if ($method($requestIp, $ip)) {
            return true;
        }
    }
    return false;
}

/**
 * Compares two IPv4 addresses.
 * In case a subnet is given, it checks if it contains the request IP.
 *
 * @param string $requestIp IPv4 address to check
 * @param string $ip IPv4 address or subnet in CIDR notation
 *
 * @return bool Whether the request IP matches the IP, or whether the request IP is within the CIDR subnet
 * @see https://github.com/symfony/http-foundation/blob/master/IpUtils.php
 */
function checkIp4($requestIp, $ip) : bool
{
    if (false !== strpos($ip, '/')) {
        list($address, $netmask) = explode('/', $ip, 2);
        if ($netmask === '0') {
            // Ensure IP is valid - using ip2long below implicitly validates, but we need to do it manually here
            return filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
        }
        if ($netmask < 0 || $netmask > 32) {
            return false;
        }
    } else {
        $address = $ip;
        $netmask = 32;
    }
    return 0 === substr_compare(sprintf('%032b', ip2long($requestIp)), sprintf('%032b', ip2long($address)), 0,
        $netmask);
}

/**
 * Compares two IPv6 addresses.
 * In case a subnet is given, it checks if it contains the request IP.
 *
 * @author David Soria Parra <dsp at php dot net>
 *
 * @see https://github.com/symfony/http-foundation/blob/master/IpUtils.php
 * @see https://github.com/dsp/v6tools
 *
 * @param string $requestIp IPv6 address to check
 * @param string $ip IPv6 address or subnet in CIDR notation
 *
 * @return bool Whether the IP is valid
 *
 * @throws \RuntimeException When IPV6 support is not enabled
 */
function checkIp6($requestIp, $ip) : bool
{
    if (!((extension_loaded('sockets') && defined('AF_INET6')) || @inet_pton('::1'))) {
        throw new \RuntimeException('Unable to check Ipv6. Check that PHP was not compiled with option "disable-ipv6".');
    }
    if (false !== strpos($ip, '/')) {
        list($address, $netmask) = explode('/', $ip, 2);
        if ($netmask < 1 || $netmask > 128) {
            return false;
        }
    } else {
        $address = $ip;
        $netmask = 128;
    }
    $bytesAddr = unpack('n*', @inet_pton($address));
    $bytesTest = unpack('n*', @inet_pton($requestIp));
    if (!$bytesAddr || !$bytesTest) {

        return false;
    }
    for ($i = 1, $ceil = ceil($netmask / 16); $i <= $ceil; ++$i) {
        $left = $netmask - 16 * ($i - 1);
        $left = ($left <= 16) ? $left : 16;
        $mask = ~(0xffff >> $left) & 0xffff;
        if (($bytesAddr[$i] & $mask) != ($bytesTest[$i] & $mask)) {
            return false;
        }
    }
    return true;
}

/**
 * Check if $ip is contained in $trustedProxies array.
 * @param array $trustedProxies
 * @param $ip
 * @return bool
 */
function isFromTrustedProxy(array $trustedProxies, $ip)
{
    return $trustedProxies && checkIp($ip, $trustedProxies);

}


1			<?php
2
3			/**
4			* get Client IP. DEPRECATED! use getClientIP().
5			* @param array $server
6			* @return string
7			* @deprecated
8			* @see getClientIp();
9			*/
10			function getIPVisitor(array $server = []) : string
11			{
12			$IP2Check = '';
13			if (array_key_exists('HTTP_X_FORWARDED_FOR', $server) && trim($server['HTTP_X_FORWARDED_FOR']) != '') {
14			$IP2Check = $server['HTTP_X_FORWARDED_FOR'];
15			} elseif (array_key_exists('REMOTE_ADDR', $server) && trim($server['REMOTE_ADDR'])) {
16			$IP2Check = $server['REMOTE_ADDR'];
17			}
18
19			if (strpos($IP2Check, ',') === false) {
20			return $IP2Check;
21			}
22
23			// Header can contain multiple IP-s of proxies that are passed through.
24			// Only the IP added by the last proxy (last IP in the list) can be trusted.
25			$arrIps = explode(',', $IP2Check);
26			if (!is_array($arrIps) \|\| count($arrIps) < 1) {
27			return '';
28			}
29
30			return trim(head($arrIps));
31			}
32
33			/**
34			* anonimizeIp masquerade last 3 digit of IP address
35			* @param string $ip
36			* @return string masked IP
37			*/
38			function anonimizeIp(string $ip) : string
39			{
40			if ($ip === null \|\| strlen($ip) < 2 \|\| strrpos($ip, ".") === false) {
41			return $ip;
42			}
43			return substr($ip, 0, strrpos($ip, ".") + 1) . '0';
44			}
45
46			/**
47			* getHost Get the Internet host name corresponding to a given IP address
48			* @param string $ip the IP to resolve.
49			* @return string Returns the host name of the Internet host specified by ip_address on success,
50			* the unmodified ip_address on failure,
51			* or FALSE on malformed input.
52			*/
53			function getHost($ip)
54			{
55			return gethostbyaddr($ip);
56			}
57
58			/**
59			* Returns the client IP addresses.
60			*
61			* In the returned array the most trusted IP address is first, and the
62			* least trusted one last. The "real" client IP address is the last one,
63			* but this is also the least trusted one.
64			* Trusted proxies are stripped if passed.
65			*
66			* Use this method carefully; you should use getClientIp() instead.
67			*
68			* @param array $server
69			* @param array $trustedProxies
70			*
71			* @return array The client IP addresses
72			*
73			* @see getClientIp()
74			* @see https://github.com/symfony/symfony/blob/0b39ce23150c34c990e3eccfae4e375161c0d352/src/Symfony/Component/HttpFoundation/Request.php#L831
75			*/
76			function getClientIps(array $server, array $trustedProxies = []) : array
77			{
78			if (empty($server)) {
79			return [''];
80			}
81			$clientIps = array();
82			$ip = $server['REMOTE_ADDR'];
83			if (!isFromTrustedProxy($trustedProxies, $ip)) {
84			return array($ip);
85			}
86			if (array_key_exists('FORWARDED', $server) && trim($server['FORWARDED']) != '') {
87			$forwardedHeader = $server['FORWARDED'];
88			preg_match_all('{(for)=("?\[?)([a-z0-9\.:_\-/]*)}', $forwardedHeader, $matches);
89			$clientIps = $matches[3];
90			} elseif (array_key_exists('X_FORWARDED_FOR', $server) && trim($server['X_FORWARDED_FOR']) != '') {
91			$clientIps = array_map('trim', explode(',', $server['X_FORWARDED_FOR']));
92			}
93			$clientIps[] = $ip; // Complete the IP chain with the IP the request actually came from
94			$ip = $clientIps[0]; // Fallback to this when the client IP falls into the range of trusted proxies
95			foreach ($clientIps as $key => $clientIp) {
96			// Remove port (unfortunately, it does happen)
97			if (preg_match('{((?:\d+\.){3}\d+)\:\d+}', $clientIp, $match)) {
98			$clientIps[$key] = $clientIp = $match[1];
99			}
100			if (checkIp($clientIp, $trustedProxies)) {
101			unset($clientIps[$key]);
102			}
103			}
104			// Now the IP chain contains only untrusted proxies and the client IP
105			return $clientIps ? array_reverse($clientIps) : array($ip);
106			}
107
108			/**
109			* Returns the client IP address.
110			*
111			* This method can read the client IP address from the "X-Forwarded-For" header
112			* when trusted proxies were set via "setTrustedProxies()". The "X-Forwarded-For"
113			* header value is a comma+space separated list of IP addresses, the left-most
114			* being the original client, and each successive proxy that passed the request
115			* adding the IP address where it received the request from.
116			*
117			* If your reverse proxy uses a different header name than "X-Forwarded-For",
118			* ("Client-Ip" for instance), configure it via "setTrustedHeaderName()" with
119			* the "client-ip" key.
120			*
121			* @param array $server
122			* @param array $trustedProxies
123			*
124			* @return string The client IP address
125			*
126			* @see getClientIps()
127			* @see https://github.com/symfony/symfony/blob/0b39ce23150c34c990e3eccfae4e375161c0d352/src/Symfony/Component/HttpFoundation/Request.php#L886
128			* @see http://en.wikipedia.org/wiki/X-Forwarded-For
129			*
130			*/
131			function getClientIp(array $server, array $trustedProxies = []) : string
132			{
133			$ipAddresses = getClientIps($server, $trustedProxies);
134			return $ipAddresses[0];
135			}
136
137			/**
138			* Checks if an IPv4 or IPv6 address is contained in the list of given IPs or subnets.
139			*
140			* @param string $requestIp IP to check
141			* @param string\|array $ips List of IPs or subnets (can be a string if only a single one)
142			*
143			* @return bool Whether the IP is valid
144			* @see https://github.com/symfony/http-foundation/blob/master/IpUtils.php
145			*/
146			function checkIp($requestIp, $ips) : bool
147			{
148			if (empty($ips)) {
149			return false;
150			}
151			if (!is_array($ips)) {
152			$ips = array($ips);
153			}
154			$method = substr_count($requestIp, ':') > 1 ? 'checkIp6' : 'checkIp4';
155			foreach ($ips as $ip) {
156			if ($method($requestIp, $ip)) {
157			return true;
158			}
159			}
160			return false;
161			}
162
163			/**
164			* Compares two IPv4 addresses.
165			* In case a subnet is given, it checks if it contains the request IP.
166			*
167			* @param string $requestIp IPv4 address to check
168			* @param string $ip IPv4 address or subnet in CIDR notation
169			*
170			* @return bool Whether the request IP matches the IP, or whether the request IP is within the CIDR subnet
171			* @see https://github.com/symfony/http-foundation/blob/master/IpUtils.php
172			*/
173			function checkIp4($requestIp, $ip) : bool
174			{
175			if (false !== strpos($ip, '/')) {
176			list($address, $netmask) = explode('/', $ip, 2);
177			if ($netmask === '0') {
178			// Ensure IP is valid - using ip2long below implicitly validates, but we need to do it manually here
179			return filter_var($address, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
180			}
181			if ($netmask < 0 \|\| $netmask > 32) {
182			return false;
183			}
184			} else {
185			$address = $ip;
186			$netmask = 32;
187			}
188			return 0 === substr_compare(sprintf('%032b', ip2long($requestIp)), sprintf('%032b', ip2long($address)), 0,
189			$netmask);
190			}
191
192			/**
193			* Compares two IPv6 addresses.
194			* In case a subnet is given, it checks if it contains the request IP.
195			*
196			* @author David Soria Parra <dsp at php dot net>
197			*
198			* @see https://github.com/symfony/http-foundation/blob/master/IpUtils.php
199			* @see https://github.com/dsp/v6tools
200			*
201			* @param string $requestIp IPv6 address to check
202			* @param string $ip IPv6 address or subnet in CIDR notation
203			*
204			* @return bool Whether the IP is valid
205			*
206			* @throws \RuntimeException When IPV6 support is not enabled
207			*/
208			function checkIp6($requestIp, $ip) : bool
209			{
210			if (!((extension_loaded('sockets') && defined('AF_INET6')) \|\| @inet_pton('::1'))) {
211			throw new \RuntimeException('Unable to check Ipv6. Check that PHP was not compiled with option "disable-ipv6".');
212			}
213			if (false !== strpos($ip, '/')) {
214			list($address, $netmask) = explode('/', $ip, 2);
215			if ($netmask < 1 \|\| $netmask > 128) {
216			return false;
217			}
218			} else {
219			$address = $ip;
220			$netmask = 128;
221			}
222			$bytesAddr = unpack('n*', @inet_pton($address));
223			$bytesTest = unpack('n*', @inet_pton($requestIp));
224			if (!$bytesAddr \|\| !$bytesTest) {
			0 ignored issues – show Bug Best Practice introduced 2016-08-22 20:39 UTC by Report Bug Copy Issue Report The expression `$bytesAddr` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history... Bug Best Practice introduced 2016-08-22 20:39 UTC by Report Bug Copy Issue Report The expression `$bytesTest` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
225			return false;
226			}
227			for ($i = 1, $ceil = ceil($netmask / 16); $i <= $ceil; ++$i) {
228			$left = $netmask - 16 * ($i - 1);
229			$left = ($left <= 16) ? $left : 16;
230			$mask = ~(0xffff >> $left) & 0xffff;
231			if (($bytesAddr[$i] & $mask) != ($bytesTest[$i] & $mask)) {
232			return false;
233			}
234			}
235			return true;
236			}
237
238			/**
239			* Check if $ip is contained in $trustedProxies array.
240			* @param array $trustedProxies
241			* @param $ip
242			* @return bool
243			*/
244			function isFromTrustedProxy(array $trustedProxies, $ip)
245			{
246			return $trustedProxies && checkIp($ip, $trustedProxies);
			0 ignored issues – show Bug Best Practice introduced 2016-08-22 20:39 UTC by Report Bug Copy Issue Report The expression `$trustedProxies` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `! empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
247			}
248

padosoft / support

Push — master ( 5f0ee2...6f3a7a )

ip.php ➔ checkIp6() C

Complexity

Size

Duplication

Importance

How to fix Complexity

Long Method

Duplication Side-by-Side

Filter issues like