1 files changed, 43 insertions, 0 deletions
diff --git a/utils.php b/utils.php
new file mode 100644
index 0000000..a123294
--- /dev/null
+++ b/utils.php
@@ -0,0 +1,43 @@
+<?php
+
+function match_ipv4($ip) {
+  return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
+}
+
+function match_ipv6($ip) {
+  return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6);
+}
+
+function match_fqdn($fqdn) {
+  $regex = '/^(?=.{1,255}$)[0-9A-Za-z](?:(?:[0-9A-Za-z]|-){0,61}[0-9A-Za-z])?(?:\.[0-9A-Za-z](?:(?:[0-9A-Za-z]|-){0,61}[0-9A-Za-z])?)*\.?$/';
+
+  if ((preg_match($regex, $fqdn) === false) ||
+      (preg_match($regex, $fqdn) === 0)) {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+function match_as($as) {
+  $options_wide_range = array(
+    'options' => array('min_range' => 1, 'max_range' => 4294967294)
+  );
+  $options_16bit_private = array(
+    'options' => array( 'min_range' => 64512, 'max_range' => 65534)
+  );
+  $options_32bit_private = array(
+    'options' => array('min_range' => 4200000000, 'max_range' => 4294967294)
+  );
+
+  return (filter_var($as, FILTER_VALIDATE_INT, $options_wide_range) &&
+         !filter_var($as, FILTER_VALIDATE_INT, $options_16bit_private) &&
+         !filter_var($as, FILTER_VALIDATE_INT, $options_32bit_private));
+}
+
+function match_aspath_regex($aspath_regex) {
+  // TODO: validate a regex with a regex?
+  return true;
+}
+
+// End of utils.php