From 7f2c2629194ec04937658afe3ebf92ded3ab4a12 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 23 Jan 2015 09:31:44 -0600
Subject: Networking:  UDP checksums must always be used with IPv6

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

diff --git a/nuttx/net/udp/Kconfig b/nuttx/net/udp/Kconfig
index d52f4f7a2..68a80bced 100644
--- a/nuttx/net/udp/Kconfig
+++ b/nuttx/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"
-- 
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