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1302bd1181
Run `staticcheck` with `U1000` to find unused code. This cleans up about a half of it. I'll do the other half separately to keep PRs manageable. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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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 := interfaceIndexLocked(d); 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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func interfaceIndexLocked(d *Dialer) (index int, ok bool) {
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if d.netMon == nil {
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return 0, false
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}
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st := d.netMon.InterfaceState()
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iface, ok := st.Interface[d.tunName]
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if !ok {
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return 0, false
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}
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return iface.Index, true
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}
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