func (v *veth) initialize(config *network) error { peer := config.TempVethPeerName if peer == "" { return fmt.Errorf("peer is not specified") } child, err := net.InterfaceByName(peer) if err != nil { return err } if err := netlink.NetworkLinkDown(child); err != nil { return err } if err := netlink.NetworkChangeName(child, config.Name); err != nil { return err } // get the interface again after we changed the name as the index also changes. if child, err = net.InterfaceByName(config.Name); err != nil { return err } if config.MacAddress != "" { if err := netlink.NetworkSetMacAddress(child, config.MacAddress); err != nil { return err } } ip, ipNet, err := net.ParseCIDR(config.Address) if err != nil { return err } if err := netlink.NetworkLinkAddIp(child, ip, ipNet); err != nil { return err } if config.IPv6Address != "" { if ip, ipNet, err = net.ParseCIDR(config.IPv6Address); err != nil { return err } if err := netlink.NetworkLinkAddIp(child, ip, ipNet); err != nil { return err } } if err := netlink.NetworkSetMTU(child, config.Mtu); err != nil { return err } if err := netlink.NetworkLinkUp(child); err != nil { return err } if config.Gateway != "" { if err := netlink.AddDefaultGw(config.Gateway, config.Name); err != nil { return err } } if config.IPv6Gateway != "" { if err := netlink.AddDefaultGw(config.IPv6Gateway, config.Name); err != nil { return err } } return nil }
// NewBridge creates new network bridge on Linux host with the name passed as a parameter. // It is equivalent of running: ip link add name ${ifcName} type bridge // It returns error if the bridge can not be created. func DelBridgeWithName(ifcName string) error { if ok, err := NetInterfaceNameValid(ifcName); !ok { return err } ifc, err := net.InterfaceByName(ifcName) if err != nil { return fmt.Errorf("Interface name %s isn't' assigned on the host", ifcName) } if err := netlink.NetworkLinkDown(ifc); err != nil { return err } if err := netlink.DeleteBridge(ifcName); err != nil { return err } if _, err = net.InterfaceByName(ifcName); err == nil { return fmt.Errorf("Could not delete the old interface: %s", err) } return nil }
// SetLinkDown brings the link down. // It is equivalent of running: ip link set dev ${interface name} down func (l *Link) SetLinkDown() error { return netlink.NetworkLinkDown(l.NetInterface()) }