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wgengine/wgcfg: return better errors from DeviceConfig, ReconfigDevice

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Prefer the error from the actual wireguard-go device method call,
not {To,From}UAPI, as those tend to be less interesting I/O errors.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
This commit is contained in:
Josh Bleecher Snyder 2021-04-30 14:15:03 -07:00
parent 1f6c4ba7c3
commit 777c816b34
1 changed files with 10 additions and 8 deletions
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18
wgengine/wgcfg/device.go
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@ -20,13 +20,14 @@ func DeviceConfig(d *device.Device) (*Config, error) {
w.Close()
}()
cfg, err := FromUAPI(r)
// Prefer errors from IpcGetOperation.
if setErr := <-errc; setErr != nil {
return nil, setErr
}
// Check FromUAPI error.
if err != nil {
return nil, err
}
if err := <-errc; err != nil {
return nil, err
}
sort.Slice(cfg.Peers, func(i, j int) bool {
return cfg.Peers[i].PublicKey.LessThan(&cfg.Peers[j].PublicKey)
})
@ -54,9 +55,10 @@ func ReconfigDevice(d *device.Device, cfg *Config, logf logger.Logf) (err error)
}()
err = cfg.ToUAPI(w, prev)
if err != nil {
return err
}
w.Close()
return <-errc
// Prefer errors from IpcSetOperation.
if setErr := <-errc; setErr != nil {
return setErr
}
return err // err (if any) from cfg.ToUAPI
}