From 43e83726ae2ab6529964833542b35ae5a17a5f52 Mon Sep 17 00:00:00 2001
From: Isaku Yamahata <yamahata@valinux.co.jp>
Date: Mon, 1 Jul 2013 14:53:31 +0900
Subject: [PATCH] lib/packet: make protocol_name property instead of attributes

Because it is read-only and to prevent accidental over-write.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 ryu/lib/packet/packet_base.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ryu/lib/packet/packet_base.py b/ryu/lib/packet/packet_base.py
index b0aeca0e..847e5ce7 100644
--- a/ryu/lib/packet/packet_base.py
+++ b/ryu/lib/packet/packet_base.py
@@ -37,7 +37,10 @@ class PacketBase(object):
     def __init__(self):
         super(PacketBase, self).__init__()
         self.length = 0
-        self.protocol_name = self.__class__.__name__
+
+    @property
+    def protocol_name(self):
+        return self.__class__.__name__
 
     @classmethod
     def parser(cls, buf):