From 87909c6dada5cba3aa659144a40b1e575d79d625 Mon Sep 17 00:00:00 2001
From: Wataru Ishida <ishida.wataru@lab.ntt.co.jp>
Date: Mon, 22 Aug 2016 02:40:27 +0000
Subject: [PATCH] Add Flags in NexthopInfo

Signed-off-by: Wataru Ishida <ishida.wataru@lab.ntt.co.jp>
---
 route.go       |  3 ++-
 route_linux.go | 14 ++++++++++++--
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/route.go b/route.go
index 61cf5ec..335d703 100644
--- a/route.go
+++ b/route.go
@@ -59,8 +59,9 @@ type NexthopInfo struct {
 	LinkIndex int
 	Hops      int
 	Gw        net.IP
+	Flags     int
 }
 
 func (n *NexthopInfo) String() string {
-	return fmt.Sprintf("{Ifindex: %d Weight: %d, Gw: %s}", n.LinkIndex, n.Hops+1, n.Gw)
+	return fmt.Sprintf("{Ifindex: %d Weight: %d Gw: %s Flags: %s}", n.LinkIndex, n.Hops+1, n.Gw, n.ListFlags())
 }
diff --git a/route_linux.go b/route_linux.go
index d049838..c9b1fec 100644
--- a/route_linux.go
+++ b/route_linux.go
@@ -42,16 +42,24 @@ var testFlags = []flagString{
 	{f: FLAG_PERVASIVE, s: "pervasive"},
 }
 
-func (r *Route) ListFlags() []string {
+func listFlags(flag int) []string {
 	var flags []string
 	for _, tf := range testFlags {
-		if r.Flags&int(tf.f) != 0 {
+		if flag&int(tf.f) != 0 {
 			flags = append(flags, tf.s)
 		}
 	}
 	return flags
 }
 
+func (r *Route) ListFlags() []string {
+	return listFlags(r.Flags)
+}
+
+func (n *NexthopInfo) ListFlags() []string {
+	return listFlags(n.Flags)
+}
+
 // RouteAdd will add a route to the system.
 // Equivalent to: `ip route add $route`
 func RouteAdd(route *Route) error {
@@ -154,6 +162,7 @@ func (h *Handle) routeHandle(route *Route, req *nl.NetlinkRequest, msg *nl.RtMsg
 					Hops:    uint8(nh.Hops),
 					Ifindex: int32(nh.LinkIndex),
 					Len:     uint16(syscall.SizeofRtNexthop),
+					Flags:   uint8(nh.Flags),
 				},
 			}
 			var gwData []byte
@@ -368,6 +377,7 @@ func deserializeRoute(m []byte) (Route, error) {
 				info := &NexthopInfo{
 					LinkIndex: int(nh.RtNexthop.Ifindex),
 					Hops:      int(nh.RtNexthop.Hops),
+					Flags:     int(nh.RtNexthop.Flags),
 				}
 				attrs, err := nl.ParseRouteAttr(value[syscall.SizeofRtNexthop:int(nh.RtNexthop.Len)])
 				if err != nil {