func SetMtu(name string, mtu int) error { iface, err := net.InterfaceByName(name) if err != nil { return err } return netlink.NetworkSetMTU(iface, mtu) }
// Setup networking func setupNetworking(args *InitArgs) error { if args.Ip != "" { // eth0 iface, err := net.InterfaceByName("eth0") if err != nil { return fmt.Errorf("Unable to set up networking: %v", err) } ip, ipNet, err := net.ParseCIDR(args.Ip) if err != nil { return fmt.Errorf("Unable to set up networking: %v", err) } if err := netlink.NetworkLinkAddIp(iface, ip, ipNet); err != nil { return fmt.Errorf("Unable to set up networking: %v", err) } if err := netlink.NetworkSetMTU(iface, args.Mtu); err != nil { return fmt.Errorf("Unable to set MTU: %v", err) } if err := netlink.NetworkLinkUp(iface); err != nil { return fmt.Errorf("Unable to set up networking: %v", err) } // loopback iface, err = net.InterfaceByName("lo") if err != nil { return fmt.Errorf("Unable to set up networking: %v", err) } if err := netlink.NetworkLinkUp(iface); err != nil { return fmt.Errorf("Unable to set up networking: %v", err) } } if args.Gateway != "" { gw := net.ParseIP(args.Gateway) if gw == nil { return fmt.Errorf("Unable to set up networking, %s is not a valid gateway IP", args.Gateway) } if err := netlink.AddDefaultGw(gw.String(), "eth0"); err != nil { return fmt.Errorf("Unable to set up networking: %v", err) } } return nil }