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remove dns if no address was set #38

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remove dns if no address was set #38

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12 changes: 12 additions & 0 deletions tun_windows.go
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Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,12 @@ func (t *NativeTun) configure() error {
}
}
}
} else {
// If no IPv4 address is set, remove any existing IPv4 DNS servers
err := luid.SetDNS(winipcfg.AddressFamily(windows.AF_INET), nil, nil)
if err != nil {
return E.Cause(err, "remove ipv4 dns")
}
}
if len(t.options.Inet6Address) > 0 {
err := luid.SetIPAddressesForFamily(winipcfg.AddressFamily(windows.AF_INET6), t.options.Inet6Address)
Expand All @@ -102,6 +108,12 @@ func (t *NativeTun) configure() error {
}
}
}
} else {
// If no IPv6 address is set, remove any existing IPv6 DNS servers
err := luid.SetDNS(winipcfg.AddressFamily(windows.AF_INET6), nil, nil)
if err != nil {
return E.Cause(err, "remove ipv6 dns")
}
}
if len(t.options.Inet4Address) > 0 || len(t.options.Inet6Address) > 0 {
_ = luid.DisableDNSRegistration()
Expand Down