From d5c4d774bc7c55bc861756a62f15b006d06ecdbf Mon Sep 17 00:00:00 2001
From: Wataru ISHIDA <ishi.wata.da@gmail.com>
Date: Wed, 28 Aug 2013 15:56:47 +0900
Subject: [PATCH] rest_router: avoid assertion when ip_text is 0

Signed-off-by: Wataru ISHIDA <ishida.wataru@lab.ntt.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 ryu/app/rest_router.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ryu/app/rest_router.py b/ryu/app/rest_router.py
index e0ca1bfd..26443a64 100644
--- a/ryu/app/rest_router.py
+++ b/ryu/app/rest_router.py
@@ -1831,6 +1831,8 @@ def ipv4_int_to_text(ip_int):
 
 
 def ipv4_text_to_int(ip_text):
+    if ip_text == 0:
+        return ip_text
     assert isinstance(ip_text, str)
     return struct.unpack('!I', addrconv.ipv4.text_to_bin(ip_text))[0]