From 8dc54b79e3125c1e59e9066afdcf0da8dcf5db8f Mon Sep 17 00:00:00 2001
From: Guillaume Mazoyer <respawneral@gmail.com>
Date: Wed, 6 Aug 2014 01:14:32 +0200
Subject: Add ping/traceroute for FQDN on BIRD and Quagga.

Basically this can work with all Linux boxes. It gets A and AAAA
records from DNS and decide if it can uses IPv6 or IPv4 to ping or
to traceroute. IPv6 is always preferred of course.
---
 includes/utils.php | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'includes/utils.php')

diff --git a/includes/utils.php b/includes/utils.php
index b6fc061..ee0c367 100644
--- a/includes/utils.php
+++ b/includes/utils.php
@@ -89,6 +89,46 @@ function match_aspath_regex($aspath_regex) {
   return true;
 }
 
+function fqdn_to_ip_address($fqdn) {
+  $dns_record = dns_get_record($fqdn, DNS_A + DNS_AAAA);
+
+  // No DNS record found
+  if (!$dns_record) {
+    return false;
+  }
+
+  $records_nb = count($dns_record);
+
+  // Only one record found
+  if ($records_nb == 1) {
+    if ($dns_record[0]['type'] == 'AAAA') {
+      return $dns_record[0]['ipv6'];
+    } else if ($dns_record[0]['type'] == 'A') {
+      return $dns_record[0]['ip'];
+    } else {
+      return false;
+    }
+  }
+
+  // Several records found
+  if ($records_nb > 1) {
+    // TODO: this could probably be more optimal
+    foreach ($dns_record as $record) {
+      if ($record['type'] == 'AAAA') {
+        return $record['ipv6'];
+      }
+    }
+
+    foreach ($dns_record as $record) {
+      if ($record['type'] == 'AAA') {
+        return $record['ipv4'];
+      }
+    }
+
+    return false;
+  }
+}
+
 function log_to_file($log) {
   global $config;
 
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