Naprawa lokalizacji - odczytu
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94
api/request_ip.php
Normal file
94
api/request_ip.php
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<?php
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/**
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* Adres IP klienta (pierwszy z X-Forwarded-For lub REMOTE_ADDR).
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*/
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function getRequestClientIp(): string
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{
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if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
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$parts = explode(',', (string) $_SERVER['HTTP_X_FORWARDED_FOR']);
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return trim($parts[0]);
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}
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return trim((string) ($_SERVER['REMOTE_ADDR'] ?? ''));
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}
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/**
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* Pojedyncze IP z pominięciem geo (zewnętrzne, dev, przykładowe hosty LAN).
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*/
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function getGeoBypassTrustedIps(): array
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{
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return [
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'82.160.190.247',
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'127.0.0.1',
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'::1',
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'192.168.20.84',
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'10.0.0.3',
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'10.0.0.7',
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];
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}
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/**
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* Pule wewnętrznych sieci — goście widziani przez lokalny serwer (REMOTE_ADDR z LAN).
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*/
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function getGeoBypassTrustedCidrs(): array
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{
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return [
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'10.0.0.0/24',
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];
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}
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function normalizeClientIp(string $ip): string
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{
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if (strpos($ip, '::ffff:') === 0) {
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return substr($ip, 7);
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}
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return $ip;
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}
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function ipv4InCidr(string $ip, string $cidr): bool
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{
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if (!str_contains($cidr, '/')) {
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return false;
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}
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[$subnet, $bits] = explode('/', $cidr, 2);
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$bits = (int) $bits;
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if ($bits < 0 || $bits > 32) {
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return false;
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}
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$ipLong = ip2long($ip);
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$subnetLong = ip2long($subnet);
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if ($ipLong === false || $subnetLong === false) {
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return false;
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}
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$mask = $bits === 0 ? 0 : (-1 << (32 - $bits)) & 0xFFFFFFFF;
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return ($ipLong & $mask) === ($subnetLong & $mask);
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}
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function isGeoBypassTrustedIp(string $ip): bool
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{
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$ip = normalizeClientIp($ip);
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if ($ip === '') {
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return false;
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}
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if (in_array($ip, getGeoBypassTrustedIps(), true)) {
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return true;
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}
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if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
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foreach (getGeoBypassTrustedCidrs() as $cidr) {
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if (ipv4InCidr($ip, $cidr)) {
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return true;
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}
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}
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}
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return false;
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}
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