fix: system:// should ignore dns server setting by tun listener

component/resolver/system.go

@@ -0,0 +1,39 @@
+package resolver
+
+import "sync"
+
+var blacklist struct {
+	Map   map[string]struct{}
+	Mutex sync.Mutex
+}
+
+func init() {
+	blacklist.Map = make(map[string]struct{})
+}
+
+func AddSystemDnsBlacklist(names ...string) {
+	blacklist.Mutex.Lock()
+	defer blacklist.Mutex.Unlock()
+	for _, name := range names {
+		blacklist.Map[name] = struct{}{}
+	}
+}
+
+func RemoveSystemDnsBlacklist(names ...string) {
+	blacklist.Mutex.Lock()
+	defer blacklist.Mutex.Unlock()
+	for _, name := range names {
+		delete(blacklist.Map, name)
+	}
+}
+
+func IsSystemDnsBlacklisted(names ...string) bool {
+	blacklist.Mutex.Lock()
+	defer blacklist.Mutex.Unlock()
+	for _, name := range names {
+		if _, ok := blacklist.Map[name]; ok {
+			return true
+		}
+	}
+	return false
+}