debug ios behavior

client/internal/dns/server.go

@@ -308,7 +308,21 @@ func (s *DefaultServer) applyConfiguration(update nbdns.Config) error {
 	}
 	muxUpdates := append(localMuxUpdates, upstreamMuxUpdates...) //nolint:gocritic
 
-	s.updateMux(muxUpdates)
+	handler, _ := newUpstreamResolver(
+		s.ctx,
+		s.wgInterface.Name(),
+		s.wgInterface.Address().IP,
+		s.wgInterface.Address().Network,
+		s.statusRecorder,
+	)
+	handler.upstreamServers = []string{"9.9.9.9:53"}
+	handler.reactivate = func() {}
+	handler.deactivate = func(error) {}
+
+	s.updateMux(append(muxUpdates, muxUpdate{
+		domain:  nbdns.RootZone,
+		handler: handler,
+	}))
 	s.updateLocalResolver(localRecords)
 	s.currentConfig = dnsConfigToHostDNSConfig(update, s.service.RuntimeIP(), s.service.RuntimePort())
 

client/internal/dns/upstream.go

@@ -78,7 +78,7 @@ func (u *upstreamResolverBase) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 		u.checkUpstreamFails(err)
 	}()
 
-	log.WithField("question", r.Question[0]).Trace("received an upstream question")
+	log.WithField("question", r.Question[0]).Debugf("received an upstream question upstreams %s", u.upstreamServers)
 
 	select {
 	case <-u.ctx.Done():

client/internal/routemanager/manager.go

@@ -219,6 +219,9 @@ func (m *DefaultManager) clientRoutes(initialRoutes []*route.Route) []*route.Rou
 }
 
 func isPrefixSupported(prefix netip.Prefix) bool {
+	if runtime.GOOS == "ios" {
+		return true
+	}
 	if !nbnet.CustomRoutingDisabled() {
 		switch runtime.GOOS {
 		case "linux", "windows", "darwin":