fix redundant WindowsDNS (#1456)

MetaCubeX · Aug 20, 2024 · 58efe08 · 58efe08
1 parent ba605b6
commit 58efe08
Showing 1 changed file with 11 additions and 1 deletion.
diff --git a/dns/system_windows.go b/dns/system_windows.go
@@ -16,6 +16,9 @@ func dnsReadConfig() (servers []string, err error) {
 	if err != nil {
 		return
 	}
+
+	uniqueIPs := make(map[string]struct{})
+
 	for _, aa := range aas {
 		for dns := aa.FirstDnsServerAddress; dns != nil; dns = dns.Next {
 			sa, err := dns.Address.Sockaddr.Sockaddr()
@@ -40,9 +43,16 @@ func dnsReadConfig() (servers []string, err error) {
 				// Unexpected type.
 				continue
 			}
-			servers = append(servers, ip.String())
+
+			uniqueIPs[ip.String()] = struct{}{}
 		}
 	}
+
+    servers = make([]string, 0, len(uniqueIPs))
+    for ip := range uniqueIPs {
+        servers = append(servers, ip)
+    }
+
 	return
 }