add optional parameter networks to the Create server OS API

1 files changed, 16 insertions, 0 deletions

diff --git a/nova/utils.py b/nova/utils.py
index 8784a227d..22b3a29bf 100644
--- a/nova/utils.py
+++ b/nova/utils.py
@@ -775,6 +775,22 @@ def bool_from_str(val):
         return val.lower() == 'true'
 
 
+def is_valid_ipv4(address):
+    """valid the address strictly as per format xxx.xxx.xxx.xxx.
+    where xxx is a value between 0 and 255.
+    """
+    parts = address.split(".")
+    if len(parts) != 4:
+        return False
+    for item in parts:
+        try:
+            if not 0 <= int(item) <= 255:
+                return False
+        except ValueError:
+            return False
+    return True
+
+
 class Bootstrapper(object):
     """Provides environment bootstrapping capabilities for entry points."""