network

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v0.5.0 Latest Latest Go to latest Published: Mar 30, 2026 License: Apache-2.0 Imports: 7 Imported by: 0

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Repository

github.com/herd-core/herd

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Documentation ¶

Index ¶

Constants
func Bootstrap() error
func CreatePointToPointTap(name, hostIP, guestIP string) error
func CreateTap(name, ipAddr string) error
func DeleteTap(name string) error
func Teardown() error
type IPAM
- func NewIPAM(cidr string) (*IPAM, error)
- func (i *IPAM) Acquire() (string, error)
- func (i *IPAM) Release(ip string)

Constants ¶

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const Subnet = "10.200.0.0/16"

Subnet is the internal IP range used for Firecracker microVMs.

Variables ¶

This section is empty.

Functions ¶

func Bootstrap ¶

func Bootstrap() error

Bootstrap dynamically configures the host's networking stack to allow the MicroVMs to reach the internet via NAT and IP Forwarding.

func CreatePointToPointTap ¶

func CreatePointToPointTap(name, hostIP, guestIP string) error

CreatePointToPointTap creates a new TAP interface and establishes a Point-to-Point peer route. Uses netlink syscalls directly to avoid fork/exec overhead and kernel RTNL lock contention from concurrent `ip` command invocations.

func CreateTap ¶

func CreateTap(name, ipAddr string) error

CreateTap creates a new TAP interface and assigns it an IP.

func DeleteTap ¶

func DeleteTap(name string) error

DeleteTap removes a TAP interface.

func Teardown ¶

func Teardown() error

Teardown safely reverses the NAT setup.

Types ¶

type IPAM ¶

type IPAM struct {
	// contains filtered or unexported fields
}

IPAM manages the allocation of /32 point-to-point IP addresses for Firecracker MicroVMs out of a given CIDR block.

func NewIPAM ¶

func NewIPAM(cidr string) (*IPAM, error)

NewIPAM creates a new IP address manager from a CIDR string.

func (*IPAM) Acquire ¶

func (i *IPAM) Acquire() (string, error)

Acquire gets an unused /32 guest IP from the configured subnet block.

func (*IPAM) Release ¶

func (i *IPAM) Release(ip string)

Release returns the IP to the pool.

Source Files ¶

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