From 36790652585662dd1afee3eacb47017958f33c7d Mon Sep 17 00:00:00 2001
From: Matthias Radestock <matthias.radestock@gmail.com>
Date: Wed, 27 Jan 2016 22:02:07 +0000
Subject: [PATCH] cope with nil route.Dst

Fixes #1932.
---
 net/if.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/if.go b/net/if.go
index dc391b83..f8904f55 100644
--- a/net/if.go
+++ b/net/if.go
@@ -53,7 +53,7 @@ func EnsureInterfaceAndMcastRoute(ifaceName string) (*net.Interface, error) {
 	}
 	dest := net.IPv4(224, 0, 0, 0)
 	check := func(route netlink.Route) bool {
-		return route.LinkIndex == iface.Index && route.Dst.IP.Equal(dest)
+		return route.LinkIndex == iface.Index && route.Dst != nil && route.Dst.IP.Equal(dest)
 	}
 	// check for currently-existing route after subscribing, to avoid race
 	routes, err := netlink.RouteList(nil, netlink.FAMILY_V4)