fix: add DNS header to ResolveNetip req

common/netutils/dns.go

@@ -8,9 +8,11 @@ package netutils
 import (
 	"context"
 	"fmt"
+	"github.com/mzz2017/softwind/pkg/fastrand"
 	"github.com/mzz2017/softwind/pool"
 	"golang.org/x/net/dns/dnsmessage"
 	"golang.org/x/net/proxy"
+	"math"
 	"net/netip"
 	"strings"
 	"sync"
@@ -53,7 +55,14 @@ func ResolveNetip(ctx context.Context, d proxy.Dialer, dns netip.AddrPort, host
 		return nil, fmt.Errorf("only support to lookup A/AAAA record")
 	}
 	// Build DNS req.
-	builder := dnsmessage.NewBuilder(nil, dnsmessage.Header{})
+	builder := dnsmessage.NewBuilder(nil, dnsmessage.Header{
+		ID:               uint16(fastrand.Intn(math.MaxUint16 + 1)),
+		Response:         false,
+		OpCode:           0,
+		Truncated:        false,
+		RecursionDesired: true,
+		Authoritative:    false,
+	})
 	if err = builder.StartQuestions(); err != nil {
 		return nil, err
 	}

control/udp.go

@@ -194,7 +194,7 @@ func (c *ControlPlane) handlePkt(data []byte, src, dst netip.AddrPort, outboundI
 		c.log.WithFields(logrus.Fields{
 			"ipversions": ipversions,
 			"l4protos":   l4protos,
-		}).Debugln("Choose DNS path")
+		}).Traceln("Choose DNS path")
 		// Get the min latency path.
 		for _, ver := range ipversions {
 			for _, proto := range l4protos {
@@ -208,7 +208,7 @@ func (c *ControlPlane) handlePkt(data []byte, src, dst netip.AddrPort, outboundI
 					"ver":      ver,
 					"proto":    proto,
 					"outbound": outbound.Name,
-				}).Debugln("Choice")
+				}).Traceln("Choice")
 				if bestDialer == nil || latency < bestLatency {
 					bestDialer = d
 					bestLatency = latency