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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
//go:build darwin
package prober
import (
"fmt"
"net/netip"
"os/exec"
"go4.org/netipx"
)
const tunName = "utun"
func configureTUN(addr netip.Prefix, tunname string) error {
cmd := exec.Command("ifconfig", tunname, "inet", addr.String(), addr.Addr().String())
res, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("failed to add address: %w (%s)", err, string(res))
}
net := netipx.PrefixIPNet(addr)
nip := net.IP.Mask(net.Mask)
nstr := fmt.Sprintf("%v/%d", nip, addr.Bits())
cmd = exec.Command("route", "-q", "-n", "add", "-inet", nstr, "-iface", addr.Addr().String())
res, err = cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("failed to add route: %w (%s)", err, string(res))
}
return nil
}
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