From e22848c19c366a332e207c73addc526f6652236c Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 23 Jan 2015 09:31:44 -0600
Subject: [PATCH] Networking:  UDP checksums must always be used with IPv6

---
 net/udp/Kconfig | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/udp/Kconfig b/net/udp/Kconfig
index d52f4f7a22e..68a80bced0d 100644
--- a/net/udp/Kconfig
+++ b/net/udp/Kconfig
@@ -16,9 +16,11 @@ if NET_UDP
 
 config NET_UDP_CHECKSUMS
 	bool "UDP checksums"
-	default n
+	default y if NET_IPv6
+	default n if !NET_IPv6
 	---help---
-		Enable/disable UDP checksum support
+		Enable/disable UDP checksum support.  UDP checksum support is
+		REQUIRED for IPv6.
 
 config NET_UDP_CONNS
 	int "Number of UDP sockets"