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ipn/ipnlocal: disallow exit nodes from using exit nodes

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Nodes which have both -advertise-exit-node and -exit-node in prefs
should continue have them until the next invocation of `tailscale up`.

Updates #3569.

Signed-off-by: salman <salman@tailscale.com>
This commit is contained in:
salman 2022-11-18 13:07:55 +00:00 committed by salman
parent 5f68763cb2
commit 2d271f3bd1
1 changed files with 10 additions and 0 deletions
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10
ipn/ipnlocal/local.go
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@ -2362,6 +2362,9 @@ func (b *LocalBackend) checkPrefsLocked(p *ipn.Prefs) error {
if err := b.checkSSHPrefsLocked(p); err != nil { if err := b.checkSSHPrefsLocked(p); err != nil {
errs = append(errs, err) errs = append(errs, err)
} }
if err := b.checkExitNodePrefsLocked(p); err != nil {
errs = append(errs, err)
}
return multierr.New(errs...) return multierr.New(errs...)
} }
@ -2441,6 +2444,13 @@ func (b *LocalBackend) isDefaultServerLocked() bool {
return prefs.ControlURLOrDefault() == ipn.DefaultControlURL return prefs.ControlURLOrDefault() == ipn.DefaultControlURL
} }
func (b *LocalBackend) checkExitNodePrefsLocked(p *ipn.Prefs) error {
if (p.ExitNodeIP.IsValid() || p.ExitNodeID != "") && p.AdvertisesExitNode() {
return errors.New("Cannot advertise an exit node and use an exit node at the same time.")
}
return nil
}
func (b *LocalBackend) EditPrefs(mp *ipn.MaskedPrefs) (ipn.PrefsView, error) { func (b *LocalBackend) EditPrefs(mp *ipn.MaskedPrefs) (ipn.PrefsView, error) {
b.mu.Lock() b.mu.Lock()
if mp.EggSet { if mp.EggSet {