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fix: should update system DNS every 5 seconds

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This commit is contained in:
mzz2017
2023-04-02 17:43:50 +08:00
parent 648710a40e
commit 85343ac141
9 changed files with 61 additions and 41 deletions
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11
common/netutils/dns.go
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@ -37,10 +37,13 @@ func TryUpdateSystemDns() (err error) {
return err
}
// TryUpdateSystemDns1s will update system DNS if 1 second has elapsed since the last TryUpdateSystemDns1s call.
func TryUpdateSystemDns1s() (err error) {
// TryUpdateSystemDnsElapse will update system DNS if duration has elapsed since the last TryUpdateSystemDns1s call.
func TryUpdateSystemDnsElapse(k time.Duration) (err error) {
systemDnsMu.Lock()
defer systemDnsMu.Unlock()
return tryUpdateSystemDnsElapse(k)
}
func tryUpdateSystemDnsElapse(k time.Duration) (err error) {
if time.Now().Before(systemDnsNextUpdateAfter) {
return fmt.Errorf("update too quickly")
}
@ -48,7 +51,7 @@ func TryUpdateSystemDns1s() (err error) {
if err != nil {
return err
}
systemDnsNextUpdateAfter = time.Now().Add(time.Second)
systemDnsNextUpdateAfter = time.Now().Add(k)
return nil
}
@ -70,6 +73,8 @@ func SystemDns() (dns netip.AddrPort, err error) {
return netip.AddrPort{}, err
}
}
// To avoid environment changing.
_ = tryUpdateSystemDnsElapse(5 * time.Second)
return systemDns, nil
}