blob: fa40feef045242e82316d68468e2e60b36823a5b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
// This file's built on iOS and on two of three macOS build variants:
// the two GUI variants that both use Extensions (Network Extension
// and System Extension). It's not used on tailscaled-on-macOS.
//go:build ts_macext && (darwin || ios)
package tsdial
import (
"errors"
"net"
"syscall"
"tailscale.com/net/netns"
)
func init() {
peerDialControlFunc = peerDialControlFuncNetworkExtension
}
func peerDialControlFuncNetworkExtension(d *Dialer) func(network, address string, c syscall.RawConn) error {
d.mu.Lock()
defer d.mu.Unlock()
index := -1
if x, ok := interfaceIndexLocked(d); ok {
index = x
}
var lc net.ListenConfig
netns.SetListenConfigInterfaceIndex(&lc, index)
return func(network, address string, c syscall.RawConn) error {
if index == -1 {
return errors.New("failed to find TUN interface to bind to")
}
return lc.Control(network, address, c)
}
}
func interfaceIndexLocked(d *Dialer) (index int, ok bool) {
if d.netMon == nil {
return 0, false
}
st := d.netMon.InterfaceState()
iface, ok := st.Interface[d.tunName]
if !ok {
return 0, false
}
return iface.Index, true
}
|
