tunnel

type Tunnel interface {
	// IsConnected indicates whether the tunnel is in a connected state.
	IsConnected() bool
	// Disconnect disconnects the tunnel.
	Disconnect()
	// Enabled checks if the tunnel is up and running.
	Enabled() bool
	// Mtu returns the current MTU of the tunnel (tun MTU).
	Mtu() int32
	// Creates a new link using fd (tun device).
	SetLinkAndRoutes(fd, tunmtu, engine int) error
	// Unsets existing link and closes the fd (tun device).
	Unlink() error
	// Set or unset the pcap sink
	SetPcap(fpcap string) error
	// NIC, IP, TCP, UDP, and ICMP stats.
	Stat() (*x.NetStat, error)
}