From 06ac83f14ae36fe70da4bb70fdd01b071821af53 Mon Sep 17 00:00:00 2001
From: Takashi Okamoto <toraneko@gmail.com>
Date: Sat, 9 Jan 2016 10:34:16 +0900
Subject: [PATCH] Support VXLAN udpcsum to enable UDP checksum in outer UDP
 header.

---
 link.go       | 1 +
 link_linux.go | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/link.go b/link.go
index 544a97c..2934c0f 100644
--- a/link.go
+++ b/link.go
@@ -204,6 +204,7 @@ type Vxlan struct {
 	RSC          bool
 	L2miss       bool
 	L3miss       bool
+	UDPCSum      bool
 	NoAge        bool
 	GBP          bool
 	Age          int
diff --git a/link_linux.go b/link_linux.go
index 3aa9124..2a0c6db 100644
--- a/link_linux.go
+++ b/link_linux.go
@@ -277,10 +277,12 @@ func addVxlanAttrs(vxlan *Vxlan, linkInfo *nl.RtAttr) {
 	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_L2MISS, boolAttr(vxlan.L2miss))
 	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_L3MISS, boolAttr(vxlan.L3miss))
 
+	if vxlan.UDPCSum {
+		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_UDP_CSUM, boolAttr(vxlan.UDPCSum))
+	}
 	if vxlan.GBP {
 		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_GBP, boolAttr(vxlan.GBP))
 	}
-
 	if vxlan.NoAge {
 		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_AGEING, nl.Uint32Attr(0))
 	} else if vxlan.Age > 0 {
@@ -935,6 +937,8 @@ func parseVxlanData(link Link, data []syscall.NetlinkRouteAttr) {
 			vxlan.L2miss = int8(datum.Value[0]) != 0
 		case nl.IFLA_VXLAN_L3MISS:
 			vxlan.L3miss = int8(datum.Value[0]) != 0
+		case nl.IFLA_VXLAN_UDP_CSUM:
+			vxlan.UDPCSum = int8(datum.Value[0]) != 0
 		case nl.IFLA_VXLAN_GBP:
 			vxlan.GBP = int8(datum.Value[0]) != 0
 		case nl.IFLA_VXLAN_AGEING: