From 34bebd8569e9319b791802f4fd551537967aec69 Mon Sep 17 00:00:00 2001
From: Vlastimil Holer <vlastimil.holer@gmail.com>
Date: Wed, 19 Sep 2012 15:31:10 +0200
Subject: Optionally resolve IPv4 hostname.

---
 cloudinit/util.py | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'cloudinit/util.py')

diff --git a/cloudinit/util.py b/cloudinit/util.py
index 33da73eb..b25ded0d 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -874,6 +874,13 @@ def get_hostname():
     return hostname
 
 
+def gethostbyaddr(ip):
+    try:
+        return socket.gethostbyaddr(ip)[0]
+    except socket.herror:
+        return None
+
+
 def is_resolvable_url(url):
     """determine if this url is resolvable (existing or ip)."""
     return (is_resolvable(urlparse.urlparse(url).hostname))
-- 
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