func newVlanInterface(name string) error {
intSplit := strings.Split(name, ".")
if len(intSplit) != 2 {
return errors.New("invalid interface name, ie. eth0")
}
vlanID, _ := strconv.Atoi(intSplit[1])
err := dnetlink.NetworkLinkAddVlan(intSplit[0], name, uint16(vlanID))
if err != nil && err.Error() == "file exists" {
return nil
} else if err != nil {
return err
}
return nil
}
// NewVlanLinkWithOptions creates vlan network link and sets some of its network parameters
// to values passed in as VlanOptions
//
// It is equivalent of running:
// ip link add name ${vlan name} link ${master interface} address ${macaddress} type vlan id ${tag}
// NewVlanLinkWithOptions returns Vlaner which is initialized to a pointer of type VlanLink if the
// vlan link was created successfully on the Linux host. It accepts VlanOptions which allow you to set
// link's options. It returns error if the link could not be created.
func NewVlanLinkWithOptions(masterDev string, opts VlanOptions) (Vlaner, error) {
if ok, err := NetInterfaceNameValid(masterDev); !ok {
return nil, err
}
if _, err := net.InterfaceByName(masterDev); err != nil {
return nil, fmt.Errorf("Master VLAN device %s does not exist on the host", masterDev)
}
if err := validateVlanOptions(&opts); err != nil {
return nil, err
}
if err := netlink.NetworkLinkAddVlan(masterDev, opts.Dev, opts.Id); err != nil {
return nil, err
}
vlanIfc, err := net.InterfaceByName(opts.Dev)
if err != nil {
return nil, fmt.Errorf("Could not find the new interface: %s", err)
}
if opts.MacAddr != "" {
if err := netlink.NetworkSetMacAddress(vlanIfc, opts.MacAddr); err != nil {
if errDel := DeleteLink(vlanIfc.Name); errDel != nil {
return nil, fmt.Errorf("Incorrect options specified. Attempt to delete the link failed: %s",
errDel)
}
}
}
masterIfc, err := net.InterfaceByName(masterDev)
if err != nil {
return nil, fmt.Errorf("Could not find the new interface: %s", err)
}
return &VlanLink{
Link: Link{
ifc: vlanIfc,
},
masterIfc: masterIfc,
id: opts.Id,
}, nil
}
// NewVlanLink creates vlan network link.
//
// It is equivalent of running:
// ip link add name vlan${RANDOM STRING} link ${master interface name} type vlan id ${tag}
// NewVlanLink returns Vlaner which is initialized to a pointer of type VlanLink if the
// vlan link was successfully created on the Linux host. Newly created link is assigned
// a random name starting with "vlan". It returns error if the link can not be created.
func NewVlanLink(masterDev string, id uint16) (Vlaner, error) {
vlanDev := makeNetInterfaceName("vlan")
if ok, err := NetInterfaceNameValid(masterDev); !ok {
return nil, err
}
if _, err := net.InterfaceByName(masterDev); err != nil {
return nil, fmt.Errorf("Master VLAN device %s does not exist on the host", masterDev)
}
if id <= 0 {
return nil, fmt.Errorf("VLAN id must be a postive Integer: %d", id)
}
if err := netlink.NetworkLinkAddVlan(masterDev, vlanDev, id); err != nil {
return nil, err
}
vlanIfc, err := net.InterfaceByName(vlanDev)
if err != nil {
return nil, fmt.Errorf("Could not find the new interface: %s", err)
}
masterIfc, err := net.InterfaceByName(masterDev)
if err != nil {
return nil, fmt.Errorf("Could not find the new interface: %s", err)
}
return &VlanLink{
Link: Link{
ifc: vlanIfc,
},
masterIfc: masterIfc,
id: id,
}, nil
}