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())
}