tailscale/net/interfaces/interfaces_darwin_nocgo.go

// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build darwin,!cgo

package interfaces

func init() {
	likelyHomeRouterIP = likelyHomeRouterIPDarwinExec
}
net/interfaces: use syscalls to find private gateway IP address iOS doesn't let you run subprocesses, which means we can't use netstat to get routing information. Instead, use syscalls and grub around in the results. We keep the old netstat version around, both for use in non-cgo builds, and for use testing the syscall-based version. Note that iOS doesn't ship route.h, so we include a copy here from the macOS 10.15 SDK (which is itself unchanged from the 10.14 SDK). I have tested manually that this yields the correct gateway IP address on my own macOS and iOS devices. More coverage would be most welcome. Signed-off-by: Josh Bleecher Snyder <josharian@gmail.com> 2020-08-04 21:20:38 +00:00			`// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.`
			`// Use of this source code is governed by a BSD-style`
			`// license that can be found in the LICENSE file.`

			`// +build darwin,!cgo`

			`package interfaces`

			`func init() {`
			`likelyHomeRouterIP = likelyHomeRouterIPDarwinExec`
			`}`