From 7f6bb8c18c5feb0c75dd59e849e786d38c66108a Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Date: Fri, 2 Aug 2013 16:36:04 +0900
Subject: [PATCH] packet lib: provide bpdu._MIN_LEN

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 ryu/lib/packet/bpdu.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ryu/lib/packet/bpdu.py b/ryu/lib/packet/bpdu.py
index 89253eaa..ee2940b5 100644
--- a/ryu/lib/packet/bpdu.py
+++ b/ryu/lib/packet/bpdu.py
@@ -158,6 +158,8 @@ class bpdu(packet_base.PacketBase):
     _PACK_LEN = struct.calcsize(_PACK_STR)
     _BPDU_TYPES = {}
 
+    _MIN_LEN = _PACK_LEN
+
     @staticmethod
     def register_bpdu_type(sub_cls):
         bpdu._BPDU_TYPES[sub_cls.BPDU_TYPE] = sub_cls