切换为默认的dns解析;增加resolver=system的支持

2026-07-02 20:50:24 +08:00
parent a24d79fd45
commit bf85966600
6 changed files with 312 additions and 24 deletions
@@ -82,6 +82,11 @@ func NewExchanger(addr string, opts ...Option) (Exchanger, error) {
 		opt(&options)
 	}

+	addr = strings.TrimSpace(addr)
+	if isSystemResolverAddr(addr) {
+		return newSystemExchanger(addr, options), nil
+	}
+
 	if !strings.Contains(addr, "://") {
 		addr = "udp://" + addr
 	}
@@ -143,6 +148,15 @@ func NewExchanger(addr string, opts ...Option) (Exchanger, error) {
 	return ex, nil
 }

+func isSystemResolverAddr(addr string) bool {
+	switch strings.ToLower(strings.TrimSpace(addr)) {
+	case "system", "auto", "system://", "auto://":
+		return true
+	default:
+		return false
+	}
+}
+
 func (ex *exchanger) Exchange(ctx context.Context, msg []byte) ([]byte, error) {
 	if ex.network == "https" {
 		return ex.dohExchange(ctx, msg)