//go:build darwin

package main

import (
	"context"
	"errors"
	"net/netip"
	"os/exec"
	"time"
)

func physicalExitFor(endpoint netip.Addr) (physicalRoute, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
	defer cancel()
	output, err := exec.CommandContext(ctx, "/sbin/route", "-n", "get", endpoint.String()).Output()
	if err != nil {
		return physicalRoute{}, errors.New("无法读取 VPN 网关的当前物理出口")
	}
	return parsePhysicalRoute(string(output))
}