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router_linux.go: tailscale down restores /etc/resolv.conf file

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Signed-off-by: Christina Wen <christina@tailscale.com>
This commit is contained in:
Christina Wen 2020-09-10 17:19:17 -04:00
parent a877dd575c
commit ee673d5967
1 changed files with 8 additions and 1 deletions
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9
wgengine/router/router_linux.go
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@ -163,11 +163,18 @@ func (r *linuxRouter) Close() error {
} }
// Set implements the Router interface. // Set implements the Router interface.
func (r *linuxRouter) Set(cfg *Config) error { func (r *linuxRouter) Set(cfg *Config) (err error) {
if cfg == nil { if cfg == nil {
cfg = &shutdownConfig cfg = &shutdownConfig
} }
defer func() {
if err != nil {
// restore /etc/resolv.conf to its original state.
r.dns.Set(dns.Config{})
}
}()
if err := r.setNetfilterMode(cfg.NetfilterMode); err != nil { if err := r.setNetfilterMode(cfg.NetfilterMode); err != nil {
return err return err
} }