bug symfony#13114 [HttpFoundation] fixed error when an IP in the X-Forwarded-For HTTP head... (fabpot)

This PR was merged into the 2.3 branch.

Discussion
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[HttpFoundation] fixed error when an IP in the X-Forwarded-For HTTP head...

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

On symfony.com, we have errors related to IP addresses in the `X-Forwarded-For` HTTP header that have a port. If that happens (I have no ideas what is doing that), the page crashes with an error like `inet_pton(): Unrecognized address 187.65.229.211:63479` (which comes from IpUtils::checkIpv6()). This fixes the root cause by removing the port.

symfony#12572 is solving the consequence and I propose to also merge it.

Commits
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60ad382 [HttpFoundation] fixed error when an IP in the X-Forwarded-For HTTP header contains a port

Author: fabpot

src/Symfony/Component/HttpFoundation/Request.php

@@ -793,6 +793,11 @@ public function getClientIps()
 
         // Eliminate all IPs from the forwarded IP chain which are trusted proxies
         foreach ($clientIps as $key => $clientIp) {
+            // Remove port on IPv4 address (unfortunately, it does happen)
+            if (preg_match('{((?:\d+\.){3}\d+)\:\d+}', $clientIp, $match)) {
+                $clientIps[$key] = $clientIp = $match[1];
+            }
+
             if (IpUtils::checkIp($clientIp, self::$trustedProxies)) {
                 unset($clientIps[$key]);
             }

src/Symfony/Component/HttpFoundation/Tests/RequestTest.php

@@ -884,6 +884,9 @@ public function testGetClientIpsProvider()
             array(array('3620:0:1cfe:face:b00c::3'), '1620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3,2620:0:1cfe:face:b00c::3', array('1620:0:1cfe:face:b00c::3', '2620:0:1cfe:face:b00c::3')),
             // multiple forwarded for with remote IPv4 addr and some reverse proxies trusted but in the middle
             array(array('2620:0:1cfe:face:b00c::3', '4620:0:1cfe:face:b00c::3'), '1620:0:1cfe:face:b00c::3', '4620:0:1cfe:face:b00c::3,3620:0:1cfe:face:b00c::3,2620:0:1cfe:face:b00c::3', array('1620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3')),
+
+            // client IP with port
+            array(array('88.88.88.88'), '127.0.0.1', '88.88.88.88:12345, 127.0.0.1', array('127.0.0.1')),
         );
     }