func (rb *HostgwBackend) checkSubnetExistInRoutes() {
routeList, err := netlink.RouteList(nil, netlink.FAMILY_V4)
if err == nil {
for _, route := range rb.rl {
exist := false
for _, r := range routeList {
if r.Dst == nil {
continue
}
if routeEqual(r, route) {
exist = true
break
}
}
if !exist {
if err := netlink.RouteAdd(&route); err != nil {
if nerr, ok := err.(net.Error); !ok {
log.Errorf("Error recovering route to %v: %v, %v", route.Dst, route.Gw, nerr)
}
continue
} else {
log.Infof("Route recovered %v : %v", route.Dst, route.Gw)
}
}
}
}
}
func GetDefaultGatewayIface() (*net.Interface, error) {
routes, err := netlink.RouteList(nil, syscall.AF_INET)
if err != nil {
return nil, err
}
for _, route := range routes {
if route.Dst == nil || route.Dst.String() == "0.0.0.0/0" {
if route.LinkIndex <= 0 {
return nil, errors.New("Found default route but could not determine interface")
}
return net.InterfaceByIndex(route.LinkIndex)
}
}
return nil, errors.New("Unable to find default route")
}