diff options
Diffstat (limited to 'system/core/Input.php')
| -rw-r--r-- | system/core/Input.php | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/system/core/Input.php b/system/core/Input.php index 162e40c85..c0c85a5e8 100644 --- a/system/core/Input.php +++ b/system/core/Input.php @@ -330,10 +330,27 @@ class CI_Input { if (config_item('proxy_ips') != '' && $this->server('HTTP_X_FORWARDED_FOR') && $this->server('REMOTE_ADDR')) { + $hasRanges = strpos($proxies, '/') !== false; $proxies = preg_split('/[\s,]/', config_item('proxy_ips'), -1, PREG_SPLIT_NO_EMPTY); $proxies = is_array($proxies) ? $proxies : array($proxies); - - $this->ip_address = in_array($_SERVER['REMOTE_ADDR'], $proxies) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR']; + + if ($hasRanges) { + $longIP = ip2long($_SERVER['REMOTE_ADDR']); + $bit32 = 1 << 32; + + foreach($proxies as $ip) { + list($address, $maskLength) = explode('/', $ip); + + $bitmask = $bit32 - (1 << (32 - (int)$maskLength)); + + if (($longIP & $bitmask) == $address) { + $this->ip_address = $_SERVER['HTTP_X_FORWARDED_FOR']; + break; + } + } + } else { + $this->ip_address = in_array($_SERVER['REMOTE_ADDR'], $proxies) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR']; + } } elseif ( ! $this->server('HTTP_CLIENT_IP') && $this->server('REMOTE_ADDR')) { |