45 lines
1.0 KiB
PHP
45 lines
1.0 KiB
PHP
<?php
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header('Content-Type: text/plain');
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ini_set('error_reporting', 0);
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$redis = new Redis();
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$redis->connect('redis-mailcow', 6379);
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function in_net($addr, $net) {
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$net = explode('/', $net);
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if (count($net) > 1) {
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$mask = $net[1];
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}
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$net = inet_pton($net[0]);
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$addr = inet_pton($addr);
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$length = strlen($net); // 4 for IPv4, 16 for IPv6
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if (strlen($net) != strlen($addr)) {
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return false;
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}
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if (!isset($mask)) {
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$mask = $length * 8;
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}
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$addr_bin = '';
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$net_bin = '';
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for ($i = 0; $i < $length; ++$i) {
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$addr_bin .= str_pad(decbin(ord(substr($addr, $i, $i+1))), 8, '0', STR_PAD_LEFT);
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$net_bin .= str_pad(decbin(ord(substr($net, $i, $i+1))), 8, '0', STR_PAD_LEFT);
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}
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return substr($addr_bin, 0, $mask) == substr($net_bin, 0, $mask);
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}
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try {
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foreach ($redis->hGetAll('WHITELISTED_FWD_HOST') as $host => $source) {
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if (in_net($_GET['host'], $host)) {
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echo '200 PERMIT';
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exit;
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}
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}
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echo '200 DUNNO';
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}
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catch (RedisException $e) {
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echo '200 DUNNO';
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exit;
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}
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?>
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