$OpenBSD: patch-dpkt_ip_py,v 1.1 2010/06/23 16:53:15 fgsch Exp $
--- dpkt/ip.py.orig	Thu Jun 17 15:51:24 2010
+++ dpkt/ip.py	Thu Jun 17 15:50:52 2010
@@ -247,9 +247,9 @@ def __load_protos():
             name = k[9:].lower()
             try:
                 mod = __import__(name, g)
-            except ImportError:
+                IP.set_proto(v, getattr(mod, name.upper()))
+            except (ImportError, AttributeError):
                 continue
-            IP.set_proto(v, getattr(mod, name.upper()))
 
 if not IP._protosw:
     __load_protos()