//go:build !linux

package vpnruntime

import "fmt"

type tunDevice struct{}

func openGatewayTun(name, addressCIDR, routeCIDR string) (*tunDevice, error) {
	return nil, fmt.Errorf("vpn gateway runtime is currently supported only on linux")
}

func (d *tunDevice) Read(packet []byte) (int, error) {
	return 0, fmt.Errorf("vpn gateway runtime is currently supported only on linux")
}

func (d *tunDevice) Write(packet []byte) (int, error) {
	return 0, fmt.Errorf("vpn gateway runtime is currently supported only on linux")
}

func (d *tunDevice) Close() error {
	return nil
}

func gatewayPlatformSnapshot(interfaceName, routeCIDR string) map[string]any {
	return map[string]any{
		"os":         "unsupported",
		"interface":  interfaceName,
		"route_cidr": routeCIDR,
	}
}