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net/tsdial: move macOS/iOS peerapi sockopt logic from LocalBackend

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Change-Id: I812cae027c40c70cdc701427b1a1850cd9bcd60c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2021-12-01 12:07:20 -08:00
committed by Brad Fitzpatrick
parent 25eab78573
commit ad3d6e31f0
7 changed files with 63 additions and 54 deletions
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29
net/tsdial/tsdial.go
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@ -67,6 +67,22 @@ func (d *Dialer) SetLinkMonitor(mon *monitor.Mon) {
d.linkMon = mon
}
func (d *Dialer) interfaceIndexLocked(ifName string) (index int, ok bool) {
if d.linkMon == nil {
return 0, false
}
st := d.linkMon.InterfaceState()
iface, ok := st.Interface[ifName]
if !ok {
return 0, false
}
return iface.Index, true
}
// peerDialControlFunc is non-nil on platforms that require a way to
// bind to dial out to other peers.
var peerDialControlFunc func(*Dialer) func(network, address string, c syscall.RawConn) error
// PeerDialControlFunc returns a function
// that can assigned to net.Dialer.Control to set sockopts or whatnot
// to make a dial escape the current platform's network sandbox.
@ -76,19 +92,10 @@ func (d *Dialer) SetLinkMonitor(mon *monitor.Mon) {
// Notably, this is non-nil on iOS and macOS when run as a Network or
// System Extension (the GUI variants).
func (d *Dialer) PeerDialControlFunc() func(network, address string, c syscall.RawConn) error {
gf, _ := d.peerDialControlFuncAtomic.Load().(func() func(network, address string, c syscall.RawConn) error)
if gf == nil {
if peerDialControlFunc == nil {
return nil
}
return gf()
}
// SetPeerDialControlFuncGetter sets a function that returns, for the
// current network configuration at the time it's called, a function
// that can assigned to net.Dialer.Control to set sockopts or whatnot
// to make a dial escape the current platform's network sandbox.
func (d *Dialer) SetPeerDialControlFuncGetter(getFunc func() func(network, address string, c syscall.RawConn) error) {
d.peerDialControlFuncAtomic.Store(getFunc)
return peerDialControlFunc(d)
}
// SetDNSMap sets the current map of DNS names learned from the netmap.