From 9844c86901b3eb496e0bfeb8d70cd89ff4bd7672 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Date: Tue, 23 Jul 2013 16:03:33 +0900
Subject: [PATCH] of13 OFPMatchField: make this safe to serialize multiple
 times

this will be used by OFPMatch old api compat code.$

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 ryu/ofproto/ofproto_v1_3_parser.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ryu/ofproto/ofproto_v1_3_parser.py b/ryu/ofproto/ofproto_v1_3_parser.py
index 7bd5432e..3542b5d0 100644
--- a/ryu/ofproto/ofproto_v1_3_parser.py
+++ b/ryu/ofproto/ofproto_v1_3_parser.py
@@ -1024,7 +1024,7 @@ class OFPMatchField(StringifyMixin):
 
     def _put_header(self, buf, offset):
         ofproto_parser.msg_pack_into('!I', buf, offset, self.header)
-        self.length += 4
+        self.length = 4
 
     def _put(self, buf, offset, value):
         ofproto_parser.msg_pack_into(self.pack_str, buf, offset, value)