From de5099fc2f0c0007d98ec33e8e6c82893e242521 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Date: Tue, 18 Jun 2013 16:35:32 +0900
Subject: [PATCH] ofctl_v1_2.actions_to_str: ignore unknown instructions

avoid crashing when the switch happens to have flows with
non OFPInstructionActions instructions.

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 ryu/lib/ofctl_v1_2.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ryu/lib/ofctl_v1_2.py b/ryu/lib/ofctl_v1_2.py
index 0789bf68..d08bb21c 100644
--- a/ryu/lib/ofctl_v1_2.py
+++ b/ryu/lib/ofctl_v1_2.py
@@ -50,6 +50,9 @@ def actions_to_str(instructions):
     actions = []
 
     for instruction in instructions:
+        if not isinstance(instruction,
+                          ofproto_v1_2_parser.OFPInstructionActions):
+            continue
         for a in instruction.actions:
             action_type = a.cls_action_type