net: filter disabled interfaces as nameservers on Windows

Currently the code add nameservers from all network interfaces to the nameservers list. But nameservers on disabled interfaces are not accessible and should not be considered as a nameserver candidate. Fixes golang#56160
zhzy0077 · Oct 11, 2022 · 0a0c9b3 · 0a0c9b3
1 parent 0160412
commit 0a0c9b3
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/net/dnsconfig_windows.go b/src/net/dnsconfig_windows.go
@@ -30,6 +30,10 @@ func dnsReadConfig(ignoredFilename string) (conf *dnsConfig) {
 	// In practice, however, it mostly works.
 	for _, aa := range aas {
 		for dns := aa.FirstDnsServerAddress; dns != nil; dns = dns.Next {
+			// Only take interfaces whose OperStatus is IfOperStatusUp(0x01) into DNS configs.
+			if aa.OperStatus == 0x01 {
+				continue
+			}
 			sa, err := dns.Address.Sockaddr.Sockaddr()
 			if err != nil {
 				continue