fix: 并发dns查询，由于ipv6阻塞导致某些情况下的网络不通

dns/resolver.go

@@ -82,12 +82,16 @@ func (r *Resolver) ResolveAllIP(host string) (ips []netip.Addr, err error) {
 
 	ips, err = r.resolveIP(host, D.TypeA)
 
-	ipv6s, open := <-ch
+	select {
+	case ipv6s, open := <-ch:
 		if !open && err != nil {
 			return nil, resolver.ErrIPNotFound
 		}
-
 		ips = append(ips, ipv6s...)
+	case <-time.After(3 * time.Millisecond):
+		// wait ipv6 3ms
+	}
+
 	return ips, nil
 }