mirror of
https://github.com/tailscale/tailscale.git
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42 lines
1.0 KiB
Go
42 lines
1.0 KiB
Go
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// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// This file's built on iOS and on two of three macOS build variants:
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// the two GUI variants that both use Extensions (Network Extension
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// and System Extension). It's not used on tailscaled-on-macOS.
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//go:build ts_macext && (darwin || ios)
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package tsdial
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import (
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"errors"
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"net"
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"syscall"
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"tailscale.com/net/netns"
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)
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func init() {
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peerDialControlFunc = peerDialControlFuncNetworkExtension
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}
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func peerDialControlFuncNetworkExtension(d *Dialer) func(network, address string, c syscall.RawConn) error {
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d.mu.Lock()
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defer d.mu.Unlock()
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index := -1
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if x, ok := d.interfaceIndexLocked(d.tunName); ok {
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index = x
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}
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var lc net.ListenConfig
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netns.SetListenConfigInterfaceIndex(&lc, index)
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return func(network, address string, c syscall.RawConn) error {
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if index == -1 {
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return errors.New("failed to find TUN interface to bind to")
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}
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return lc.Control(network, address, c)
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}
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}
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