network

func CreateBridge ¶

func CreateBridge(bridgeName string) (*netlink.Bridge, error)

CreateBridge creates and returns a netklink.Bridge

func CreateMacvtapInterfaceDocker ¶

func CreateMacvtapInterfaceDocker(master string) (
	net.IP, net.IP, net.IPMask, string, string, error)

CreateMacvtapInterfaceDocker creates a Macvtap interface associated with master (usually "eth0"). Returns the assigned IP/mask and gateway IP (previously owned by master) and the MAC of the Macvtap interface that has to be used by the unikernel's NIC.

Got the idea of using macvtap's and the fix for the inability to get the right index in a network namespace from the Kata containers repository: https://github.com/kata-containers/runtime/blob/593bd44f207aa7b21e561184ca1b3fb79da47eb6/virtcontainers/network.go

func CreateTapInterface ¶

func CreateTapInterface(tapName string, ip *net.IP, mask *net.IPMask) error

CreateTapInterface creates a new TAP interface and assignes it ip/mask as the new address. nil pointers to ip/mask indicates not to set ip/mask

func CreateTapInterfaceDocker ¶

func CreateTapInterfaceDocker(tapName string, master string) (
	net.IP, net.IP, net.IPMask, string, error)

CreateTapInterfaceDocker creates a new TAP interface and a bridge, adds both the TAP and the master link (usually eth0) to the bridge, and unsets the IP of the master link to be used by the unikernel NIC. Returns the assigned IP/mask and gateway IP.

func MaskCIDR ¶

func MaskCIDR(mask net.IPMask) int

MaskCIDR returns a mask CIDR (the 16 in 1.1.1.1/16) for a net.IPMask

func RemoveTapDevice ¶

func RemoveTapDevice(tapName string) error

RemoveTapDevices removes the tap device with name tapName

func SetupTunDev ¶

func SetupTunDev() error

SetupTunDev sets up the /dev/net/tun device if it doesn't exists