internet

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 Go to latest Published: Apr 15, 2026 License: BSD-3-Clause Imports: 14 Imported by: 0

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Functions

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Types

type StackEthernet 

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

func (*StackEthernet) Configure 

func (ls *StackEthernet) Configure(cfg StackEthernetConfig) error

Configure resets and configures the ethernet stack with the given configuration. It validates the configuration parameters and resets internal state. The connection ID is incremented on each call to invalidate existing connections.

func (*StackEthernet) ConnectionID 

func (ls *StackEthernet) ConnectionID() *uint64

func (*StackEthernet) Demux 

func (ls *StackEthernet) Demux(carrierData []byte, frameOffset int) (err error)

func (*StackEthernet) Encapsulate 

func (ls *StackEthernet) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (n int, err error)

func (*StackEthernet) Gateway6 

func (ls *StackEthernet) Gateway6() (gw [6]byte)

func (*StackEthernet) HardwareAddr6 

func (ls *StackEthernet) HardwareAddr6() [6]byte

func (*StackEthernet) LocalPort 

func (ls *StackEthernet) LocalPort() uint16

func (*StackEthernet) MTU 

func (ls *StackEthernet) MTU() int

MTU is the Maximum Transmission Unit of the stack corresponding to the maximum payload size of an ethernet frame that can be sent through the stack. Important to note that the actual ethernet frame size is MTU + Ethernet header (14) + CRC (4 if enabled), this is known as the Maximum Frame Length.

func (*StackEthernet) MaxFrameLength 

func (ls *StackEthernet) MaxFrameLength() int

MaxFrameLength returns the maximum ethernet frame length in bytes, which is the MTU plus the Ethernet header (14 bytes) and CRC (4 bytes if enabled). This is the maximum size of an Ethernet frame that can be sent from the stack.

func (*StackEthernet) Protocol 

func (ls *StackEthernet) Protocol() uint64

func (*StackEthernet) Register 

func (ls *StackEthernet) Register(h lneto.StackNode) error

func (*StackEthernet) Reset6 deprecated 

func (ls *StackEthernet) Reset6(mac, gateway [6]byte, mtu, maxNodes int) error

Reset6 resets the stack with the given parameters.

Deprecated: Use StackEthernet.Configure instead.

func (*StackEthernet) SetAcceptMulticast 

func (ls *StackEthernet) SetAcceptMulticast(accept bool)

func (*StackEthernet) SetGateway6 

func (ls *StackEthernet) SetGateway6(gw [6]byte)

func (*StackEthernet) SetHardwareAddr6 

func (ls *StackEthernet) SetHardwareAddr6(mac [6]byte)

type StackEthernetConfig 

type StackEthernetConfig struct {
	// MTU is the Maximum Transmission Unit, representing the maximum ethernet
	// payload size in bytes (excluding the 14-byte ethernet header).
	// Standard ethernet MTU is 1500. Must be between 256 and 65535.
	MTU int
	// MaxNodes is the maximum number of protocol handlers (e.g., IP, ARP)
	// that can be registered with the stack. Must be greater than 0.
	MaxNodes int
	// MAC is the local hardware (MAC) address for this ethernet interface.
	MAC [6]byte
	// Gateway is the hardware (MAC) address of the default gateway.
	// Outgoing frames will be addressed to this MAC.
	Gateway [6]byte
	// AppendCRC32, if true, appends a 32-bit CRC to outgoing frames.
	// Only needed if the PHY does not handle CRC generation.
	AppendCRC32 bool
	// CRC32Update is a IEEE CRC32 implementation that should be provided if AppendCRC32 is set.
	CRC32Update func(crc uint32, p []byte) uint32
}

StackEthernetConfig contains configuration parameters for StackEthernet.

type StackIP 

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

func (*StackIP) Addr 

func (sb *StackIP) Addr() netip.Addr

func (*StackIP) ConnectionID 

func (sb *StackIP) ConnectionID() *uint64

func (*StackIP) Demux 

func (sb *StackIP) Demux(carrierData []byte, offset int) error

func (*StackIP) Encapsulate 

func (sb *StackIP) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (int, error)

func (*StackIP) IsRegistered 

func (sb *StackIP) IsRegistered(proto lneto.IPProto) bool

func (*StackIP) LocalPort 

func (sb *StackIP) LocalPort() uint16

func (*StackIP) Protocol 

func (sb *StackIP) Protocol() uint64

func (*StackIP) Register 

func (sb *StackIP) Register(h lneto.StackNode) error

func (*StackIP) Reset 

func (sb *StackIP) Reset(addr netip.Addr, maxNodes int) error

func (*StackIP) SetAcceptMulticast 

func (sb *StackIP) SetAcceptMulticast(accept bool)

func (*StackIP) SetAddr 

func (sb *StackIP) SetAddr(addr netip.Addr) error

func (*StackIP) SetLogger 

func (sb *StackIP) SetLogger(logger *slog.Logger)

type StackPorts 

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

func (*StackPorts) ConnectionID 

func (ps *StackPorts) ConnectionID() *uint64

func (*StackPorts) Demux 

func (ps *StackPorts) Demux(b []byte, offset int) (err error)

func (*StackPorts) Encapsulate 

func (ps *StackPorts) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (n int, err error)

func (*StackPorts) LocalPort 

func (ps *StackPorts) LocalPort() uint16

func (*StackPorts) Protocol 

func (ps *StackPorts) Protocol() uint64

func (*StackPorts) Register 

func (ps *StackPorts) Register(h lneto.StackNode) error

Register registers a port StackNode on StackPorts. If dstMAC is set to non-nil, length six buffer then

func (*StackPorts) Reset 

func (ps *StackPorts) Reset(protocol uint64, dstPortOffset, maxNodes uint16) error

func (*StackPorts) ResetTCP 

func (ps *StackPorts) ResetTCP(maxNodes uint16) error

func (*StackPorts) ResetUDP 

func (ps *StackPorts) ResetUDP(maxNodes uint16) error

type StackPortsMACFiltered 

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

StackPortsMACFiltered is a StackPorts implementation but that avoids calling encapsulate on nodes with a non-nil MAC address registered via Register method that is set to all zero values. If the address is set to nil no filtering occurs. MAC Address is set automatically on the ethernet frame by StackPortsMACFiltered when non-nil.

func (*StackPortsMACFiltered) ConnectionID 

func (ps *StackPortsMACFiltered) ConnectionID() *uint64

func (*StackPortsMACFiltered) Demux 

func (ps *StackPortsMACFiltered) Demux(b []byte, offset int) (err error)

func (*StackPortsMACFiltered) Encapsulate 

func (ps *StackPortsMACFiltered) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (n int, err error)

func (*StackPortsMACFiltered) LocalPort 

func (ps *StackPortsMACFiltered) LocalPort() uint16

func (*StackPortsMACFiltered) Protocol 

func (ps *StackPortsMACFiltered) Protocol() uint64

func (*StackPortsMACFiltered) Register 

func (mfsp *StackPortsMACFiltered) Register(h lneto.StackNode, addr []byte) error

func (*StackPortsMACFiltered) Reset 

func (ps *StackPortsMACFiltered) Reset(protocol uint64, dstPortOffset, maxNodes uint16) error

func (*StackPortsMACFiltered) ResetTCP 

func (ps *StackPortsMACFiltered) ResetTCP(maxNodes uint16) error

func (*StackPortsMACFiltered) ResetUDP 

func (ps *StackPortsMACFiltered) ResetUDP(maxNodes uint16) error

type StackUDPPort 

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

func (*StackUDPPort) ConnectionID 

func (sudp *StackUDPPort) ConnectionID() *uint64

func (*StackUDPPort) Demux 

func (sudp *StackUDPPort) Demux(carrierData []byte, frameOffset int) error

func (*StackUDPPort) Encapsulate 

func (sudp *StackUDPPort) Encapsulate(carrierData []byte, offsetToIP, offsetToFrame int) (int, error)

func (*StackUDPPort) LocalPort 

func (sudp *StackUDPPort) LocalPort() uint16

func (*StackUDPPort) Protocol 

func (sudp *StackUDPPort) Protocol() uint64

func (*StackUDPPort) SetStackNode 

func (sudp *StackUDPPort) SetStackNode(node lneto.StackNode, raddr []byte, rmport uint16)

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