NewRouteInfo does take in account IPv6 route

[kunalmahajan07]

I was using the plugin to get the default route through NewRouteInfo on my IPv6 deployment and seems like the method doesn't take in account IPv6 and only provides default route for IPv4

here is the snippet of the NewRouteInfo under route_info_linux.go

func NewRouteInfo() (routeInfo, error) {
	// CoreOS Container Linux moved ip to /usr/bin/ip, so look it up on
	// $PATH and fallback to /sbin/ip on error.
	path, _ := exec.LookPath("ip")
	if path == "" {
		path = "/sbin/ip"
	}

	return routeInfo{
		cmds: map[string][]string{"ip": {path, "route"}},
	}, nil
}

Technically it path should take in account ip -6 for ipv6 as running above command on the IPv6 box returns

[root@console-kunal ~]# /sbin/ip route show default <--- returns nothing on IPv6

[root@console-kunal ~]# ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 fd0c:80bd:192:0:250:56ff:fe9e:c72/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:fe9e:c72/64 scope link
       valid_lft forever preferred_lft forever

Expected result would be something like this

root@console-kunal ~]# /sbin/ip -6 route show default
default via ip dev ens192 metric 1 pref medium
[root@console-kunal ~]#