From 67c4f23e4eeac028a2fb2871dcfdde1f513d3841 Mon Sep 17 00:00:00 2001
From: "watanabe.fumitaka" <watanabe.fumitaka1@gmail.com>
Date: Thu, 11 Apr 2013 10:59:55 +0900
Subject: ryu/app/rest_firewall.py: handling of no switch connection

This patch improves operation when there is no switch connection.

Cc: Shivaram Mysore <shivaram.mysore@gmail.com>
Signed-off-by: WATANABE Fumitaka <watanabe.fumitaka@nttcom.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 ryu/app/rest_firewall.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ryu/app/rest_firewall.py b/ryu/app/rest_firewall.py
index a2938a67..e67ccd59 100644
--- a/ryu/app/rest_firewall.py
+++ b/ryu/app/rest_firewall.py
@@ -217,8 +217,11 @@ class FirewallOfsList(dict):
         super(FirewallOfsList, self).__init__()
 
     def get_ofs(self, dp_id):
+        if len(self) == 0:
+            raise ValueError('firewall sw is not connected.')
+
         dps = {}
-        if dp_id == REST_ALL and len(self) > 0:
+        if dp_id == REST_ALL:
             dps = self
         else:
             try:
-- 
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