From f03a9ceb6c25eb7c80f2481b323f3779bd0bf877 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Date: Fri, 22 Nov 2013 16:46:00 +0900
Subject: [PATCH] packet.vrrp: some convenient routines

Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 ryu/lib/packet/vrrp.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/ryu/lib/packet/vrrp.py b/ryu/lib/packet/vrrp.py
index ab544e7c..2067fb2d 100644
--- a/ryu/lib/packet/vrrp.py
+++ b/ryu/lib/packet/vrrp.py
@@ -169,6 +169,18 @@ def is_ipv6(ip_address):
     return False
 
 
+def ip_text_to_bin(ip_text):
+    if is_ipv6(ip_text):
+        return addrconv.ipv6.text_to_bin(ip_text)
+    else:
+        return addrconv.ipv4.text_to_bin(ip_text)
+
+
+# This is used for master selection
+def ip_address_lt(ip1, ip2):
+    return ip_text_to_bin(ip1) < ip_text_to_bin(ip2)
+
+
 class vrrp(packet_base.PacketBase):
     """The base class for VRRPv2 (RFC 3768) and VRRPv3 (RFC 5798)
     header encoder/decoder classes.