delroute.go

package main

import (
    "fmt"
    "github.com/vishvananda/netlink"
)


// Note: Add route first.
//      $ sudo ip route add 8.8.8.8 dev enp0s3

func main() {
    // neigh_list, _ := netlink.NeighList(2, netlink.FAMILY_V4);
    // for _, neigh := range neigh_list {
    //     s := fmt.Sprintf("%s %s", neigh.IP, neigh.HardwareAddr)
    //     fmt.Println(s)
    // }
    route_list, _ := netlink.RouteList(nil, netlink.FAMILY_V4);
    for _, route := range route_list {
        dst := "0.0.0.0/0";
        if route.Dst != nil {
            dst = route.Dst.String();
        }

        fmt.Println(route.String());

        if dst == "8.8.8.8/32" {
            // NOTE: delete route, but does not work.
            fmt.Println(fmt.Sprintf("$ ip route del %s", dst));
            netlink.RouteDel(&route);
        }
    }
}