debug ios behavior

client/firewall/uspfilter/uspfilter.go

@@ -250,11 +250,16 @@ func (m *Manager) dropFilter(packetData []byte, rules map[string]RuleSet, isInco
 
 	switch ipLayer {
 	case layers.LayerTypeIPv4:
+		// log srcIP and DstIP
+		log.Infof("--------- srcIP: %v, dstIP: %v", d.ip4.SrcIP, d.ip4.DstIP)
 		if !m.wgNetwork.Contains(d.ip4.SrcIP) || !m.wgNetwork.Contains(d.ip4.DstIP) {
+			log.Infof("--------- srcIP: %v, dstIP: %v dropped", d.ip4.SrcIP, d.ip4.DstIP)
 			return false
 		}
 	case layers.LayerTypeIPv6:
+		log.Infof("--------- srcIP: %v, dstIP: %v", d.ip6.SrcIP, d.ip6.DstIP)
 		if !m.wgNetwork.Contains(d.ip6.SrcIP) || !m.wgNetwork.Contains(d.ip6.DstIP) {
+			log.Infof("--------- srcIP: %v, dstIP: %v dropped", d.ip6.SrcIP, d.ip6.DstIP)
 			return false
 		}
 	default:
@@ -265,12 +270,14 @@ func (m *Manager) dropFilter(packetData []byte, rules map[string]RuleSet, isInco
 	var ip net.IP
 	switch ipLayer {
 	case layers.LayerTypeIPv4:
+		log.Infof("--------- srcIP: %v, dstIP: %v", d.ip4.SrcIP, d.ip4.DstIP)
 		if isIncomingPacket {
 			ip = d.ip4.SrcIP
 		} else {
 			ip = d.ip4.DstIP
 		}
 	case layers.LayerTypeIPv6:
+		log.Infof("--------- srcIP: %v, dstIP: %v", d.ip6.SrcIP, d.ip6.DstIP)
 		if isIncomingPacket {
 			ip = d.ip6.SrcIP
 		} else {
@@ -278,6 +285,8 @@ func (m *Manager) dropFilter(packetData []byte, rules map[string]RuleSet, isInco
 		}
 	}
 
+	//
+
 	filter, ok := validateRule(ip, packetData, rules[ip.String()], d)
 	if ok {
 		return filter
@@ -295,8 +304,30 @@ func (m *Manager) dropFilter(packetData []byte, rules map[string]RuleSet, isInco
 	return true
 }
 
-func validateRule(ip net.IP, packetData []byte, rules map[string]Rule, d *decoder) (bool, bool) {
+func validateRule(ip net.IP, packetData []byte, rules map[string]Rule, d *decoder) (f bool, o bool) {
+	ipLayer := d.decoded[0]
 	payloadLayer := d.decoded[1]
+	defer func() {
+		var src, dst net.IP
+		switch ipLayer {
+		case layers.LayerTypeIPv4:
+			src = d.ip4.SrcIP
+			dst = d.ip4.DstIP
+		case layers.LayerTypeIPv6:
+			src = d.ip6.SrcIP
+			dst = d.ip6.DstIP
+		}
+
+		switch payloadLayer {
+		case layers.LayerTypeTCP:
+			log.Infof("--------- TCP srcIP-Port: %v:%d, dstIP-Port: %v:%d Ver: %t,%t", src, uint16(d.tcp.SrcPort), dst, uint16(d.tcp.DstPort), f, o)
+		case layers.LayerTypeUDP:
+			log.Infof("--------- UDP srcIP-Port: %v:%d, dstIP-Port: %v:%d Ver: %t,%t", src, uint16(d.udp.SrcPort), dst, uint16(d.udp.DstPort), f, o)
+		default:
+			log.Infof("--------- srcIP: %v, dstIP: %v Ver: %t,%t", src, dst, f, o)
+		}
+	}()
+
 	for _, rule := range rules {
 		if rule.matchByIP && !ip.Equal(rule.ip) {
 			continue

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":

util/net/net.go

@@ -2,6 +2,7 @@ package net
 
 import (
 	"os"
+	"runtime"
 
 	"github.com/google/uuid"
 )
@@ -23,5 +24,5 @@ func GenerateConnID() ConnectionID {
 }
 
 func CustomRoutingDisabled() bool {
-	return os.Getenv(envDisableCustomRouting) == "true"
+	return os.Getenv(envDisableCustomRouting) == "true" || runtime.GOOS == "ios"
 }