From 066e856163413f92191106574f70f37cca56e8a3 Mon Sep 17 00:00:00 2001
From: mzz2017 <2017@duck.com>
Date: Fri, 7 Apr 2023 23:13:10 +0800
Subject: [PATCH] optimize(dns): use different ID for another lookup in
 ipversion prefer mode

---
 control/dns_control.go | 3 +++
 example.dae            | 1 +
 2 files changed, 4 insertions(+)

diff --git a/control/dns_control.go b/control/dns_control.go
index d4f7b71..92bd1b4 100644
--- a/control/dns_control.go
+++ b/control/dns_control.go
@@ -17,10 +17,12 @@ import (
 	"github.com/daeuniverse/dae/component/outbound/dialer"
 	"github.com/mohae/deepcopy"
 	"github.com/mzz2017/softwind/netproxy"
+	"github.com/mzz2017/softwind/pkg/fastrand"
 	"github.com/mzz2017/softwind/pool"
 	"github.com/sirupsen/logrus"
 	"golang.org/x/net/dns/dnsmessage"
 	"io"
+	"math"
 	"net"
 	"net/netip"
 	"strings"
@@ -369,6 +371,7 @@ func (c *DnsController) Handle_(dnsMessage *dnsmessage.Message, req *udpRequest)
 
 	// Try to make both A and AAAA lookups.
 	dnsMessage2 := deepcopy.Copy(dnsMessage).(*dnsmessage.Message)
+	dnsMessage2.ID = uint16(fastrand.Intn(math.MaxUint16))
 	var qtype2 dnsmessage.Type
 	switch qtype {
 	case dnsmessage.TypeA:
diff --git a/example.dae b/example.dae
index 0929a1a..df1baa2 100644
--- a/example.dae
+++ b/example.dae
@@ -81,6 +81,7 @@ node {
 dns {
     # For example, if ipversion_prefer is 4 and the domain name has both type A and type AAAA records, the dae will only respond to type A queries and response empty answer to type AAAA queries.
     #ipversion_prefer: 4
+
     upstream {
         # Value can be scheme://host:port, where the scheme can be tcp/udp/tcp+udp.
         # If host is a domain and has both IPv4 and IPv6 record, dae will automatically choose