chore: regenerate protobufs

Co-authored-by: Shelikhoo <xiaokangwang@outlook.com>

.github/workflows/release.yml

@@ -121,7 +121,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.17
+          go-version: ^1.16
 
       - name: Get project dependencies
         run: go mod download

README.md

@@ -44,7 +44,6 @@
   - [Netch (NetFilter & TUN/TAP)](https://github.com/NetchX/Netch)
 - Android
   - [v2rayNG](https://github.com/2dust/v2rayNG)
-  - [AnXray](https://github.com/XTLS/AnXray)
   - [Kitsunebi](https://github.com/rurirei/Kitsunebi/tree/release_xtls)
 - iOS / Mac
   - [Shadowrocket](https://apps.apple.com/app/shadowrocket/id932747118)

app/dispatcher/default.go

@@ -179,7 +179,7 @@ func (d *DefaultDispatcher) getLink(ctx context.Context) (*transport.Link, *tran
 func shouldOverride(ctx context.Context, result SniffResult, request session.SniffingRequest, destination net.Destination) bool {
 	domain := result.Domain()
 	for _, d := range request.ExcludeForDomain {
-		if strings.ToLower(domain) == d {
+		if domain == d {
 			return false
 		}
 	}
@@ -309,15 +309,10 @@ func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool) (Sni
 func (d *DefaultDispatcher) routedDispatch(ctx context.Context, link *transport.Link, destination net.Destination) {
 	var handler outbound.Handler
 
-	skipRoutePick := false
-	if content := session.ContentFromContext(ctx); content != nil {
-		skipRoutePick = content.SkipRoutePick
-	}
-
 	routingLink := routing_session.AsRoutingContext(ctx)
 	inTag := routingLink.GetInboundTag()
 	isPickRoute := false
-	if d.router != nil && !skipRoutePick {
+	if d.router != nil {
 		if route, err := d.router.PickRoute(routingLink); err == nil {
 			outTag := route.GetOutboundTag()
 			isPickRoute = true

app/dns/config.go

@@ -0,0 +1,63 @@
+package dns
+
+import (
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/strmatcher"
+	"github.com/xtls/xray-core/common/uuid"
+)
+
+var typeMap = map[DomainMatchingType]strmatcher.Type{
+	DomainMatchingType_Full:      strmatcher.Full,
+	DomainMatchingType_Subdomain: strmatcher.Domain,
+	DomainMatchingType_Keyword:   strmatcher.Substr,
+	DomainMatchingType_Regex:     strmatcher.Regex,
+}
+
+// References:
+// https://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.xhtml
+// https://unix.stackexchange.com/questions/92441/whats-the-difference-between-local-home-and-lan
+var localTLDsAndDotlessDomains = []*NameServer_PriorityDomain{
+	{Type: DomainMatchingType_Regex, Domain: "^[^.]+$"}, // This will only match domains without any dot
+	{Type: DomainMatchingType_Subdomain, Domain: "local"},
+	{Type: DomainMatchingType_Subdomain, Domain: "localdomain"},
+	{Type: DomainMatchingType_Subdomain, Domain: "localhost"},
+	{Type: DomainMatchingType_Subdomain, Domain: "lan"},
+	{Type: DomainMatchingType_Subdomain, Domain: "home.arpa"},
+	{Type: DomainMatchingType_Subdomain, Domain: "example"},
+	{Type: DomainMatchingType_Subdomain, Domain: "invalid"},
+	{Type: DomainMatchingType_Subdomain, Domain: "test"},
+}
+
+var localTLDsAndDotlessDomainsRule = &NameServer_OriginalRule{
+	Rule: "geosite:private",
+	Size: uint32(len(localTLDsAndDotlessDomains)),
+}
+
+func toStrMatcher(t DomainMatchingType, domain string) (strmatcher.Matcher, error) {
+	strMType, f := typeMap[t]
+	if !f {
+		return nil, newError("unknown mapping type", t).AtWarning()
+	}
+	matcher, err := strMType.New(domain)
+	if err != nil {
+		return nil, newError("failed to create str matcher").Base(err)
+	}
+	return matcher, nil
+}
+
+func toNetIP(addrs []net.Address) ([]net.IP, error) {
+	ips := make([]net.IP, 0, len(addrs))
+	for _, addr := range addrs {
+		if addr.Family().IsIP() {
+			ips = append(ips, addr.IP())
+		} else {
+			return nil, newError("Failed to convert address", addr, "to Net IP.").AtWarning()
+		}
+	}
+	return ips, nil
+}
+
+func generateRandomTag() string {
+	id := uuid.New()
+	return "xray.system." + id.String()
+}

app/dns/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc        v3.15.8
 // source: app/dns/config.proto
 
 package dns
@@ -79,12 +79,112 @@ func (DomainMatchingType) EnumDescriptor() ([]byte, []int) {
 	return file_app_dns_config_proto_rawDescGZIP(), []int{0}
 }
 
+type QueryStrategy int32
+
+const (
+	QueryStrategy_USE_IP  QueryStrategy = 0
+	QueryStrategy_USE_IP4 QueryStrategy = 1
+	QueryStrategy_USE_IP6 QueryStrategy = 2
+)
+
+// Enum value maps for QueryStrategy.
+var (
+	QueryStrategy_name = map[int32]string{
+		0: "USE_IP",
+		1: "USE_IP4",
+		2: "USE_IP6",
+	}
+	QueryStrategy_value = map[string]int32{
+		"USE_IP":  0,
+		"USE_IP4": 1,
+		"USE_IP6": 2,
+	}
+)
+
+func (x QueryStrategy) Enum() *QueryStrategy {
+	p := new(QueryStrategy)
+	*p = x
+	return p
+}
+
+func (x QueryStrategy) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (QueryStrategy) Descriptor() protoreflect.EnumDescriptor {
+	return file_app_dns_config_proto_enumTypes[1].Descriptor()
+}
+
+func (QueryStrategy) Type() protoreflect.EnumType {
+	return &file_app_dns_config_proto_enumTypes[1]
+}
+
+func (x QueryStrategy) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use QueryStrategy.Descriptor instead.
+func (QueryStrategy) EnumDescriptor() ([]byte, []int) {
+	return file_app_dns_config_proto_rawDescGZIP(), []int{1}
+}
+
+type CacheStrategy int32
+
+const (
+	CacheStrategy_Cache_ALL     CacheStrategy = 0
+	CacheStrategy_Cache_NOERROR CacheStrategy = 1
+	CacheStrategy_Cache_DISABLE CacheStrategy = 2
+)
+
+// Enum value maps for CacheStrategy.
+var (
+	CacheStrategy_name = map[int32]string{
+		0: "Cache_ALL",
+		1: "Cache_NOERROR",
+		2: "Cache_DISABLE",
+	}
+	CacheStrategy_value = map[string]int32{
+		"Cache_ALL":     0,
+		"Cache_NOERROR": 1,
+		"Cache_DISABLE": 2,
+	}
+)
+
+func (x CacheStrategy) Enum() *CacheStrategy {
+	p := new(CacheStrategy)
+	*p = x
+	return p
+}
+
+func (x CacheStrategy) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (CacheStrategy) Descriptor() protoreflect.EnumDescriptor {
+	return file_app_dns_config_proto_enumTypes[2].Descriptor()
+}
+
+func (CacheStrategy) Type() protoreflect.EnumType {
+	return &file_app_dns_config_proto_enumTypes[2]
+}
+
+func (x CacheStrategy) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use CacheStrategy.Descriptor instead.
+func (CacheStrategy) EnumDescriptor() ([]byte, []int) {
+	return file_app_dns_config_proto_rawDescGZIP(), []int{2}
+}
+
 type NameServer struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
 	Address           *net.Endpoint                `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
+	ClientIp          []byte                       `protobuf:"bytes,5,opt,name=client_ip,json=clientIp,proto3" json:"client_ip,omitempty"`
+	SkipFallback      bool                         `protobuf:"varint,6,opt,name=skipFallback,proto3" json:"skipFallback,omitempty"`
 	PrioritizedDomain []*NameServer_PriorityDomain `protobuf:"bytes,2,rep,name=prioritized_domain,json=prioritizedDomain,proto3" json:"prioritized_domain,omitempty"`
 	Geoip             []*router.GeoIP              `protobuf:"bytes,3,rep,name=geoip,proto3" json:"geoip,omitempty"`
 	OriginalRules     []*NameServer_OriginalRule   `protobuf:"bytes,4,rep,name=original_rules,json=originalRules,proto3" json:"original_rules,omitempty"`
@@ -129,6 +229,20 @@ func (x *NameServer) GetAddress() *net.Endpoint {
 	return nil
 }
 
+func (x *NameServer) GetClientIp() []byte {
+	if x != nil {
+		return x.ClientIp
+	}
+	return nil
+}
+
+func (x *NameServer) GetSkipFallback() bool {
+	if x != nil {
+		return x.SkipFallback
+	}
+	return false
+}
+
 func (x *NameServer) GetPrioritizedDomain() []*NameServer_PriorityDomain {
 	if x != nil {
 		return x.PrioritizedDomain
@@ -174,6 +288,10 @@ type Config struct {
 	StaticHosts []*Config_HostMapping `protobuf:"bytes,4,rep,name=static_hosts,json=staticHosts,proto3" json:"static_hosts,omitempty"`
 	// Tag is the inbound tag of DNS client.
 	Tag string `protobuf:"bytes,6,opt,name=tag,proto3" json:"tag,omitempty"`
+	// DisableCache disables DNS cache
+	CacheStrategy   CacheStrategy `protobuf:"varint,8,opt,name=cache_strategy,json=cacheStrategy,proto3,enum=xray.app.dns.CacheStrategy" json:"cache_strategy,omitempty"`
+	QueryStrategy   QueryStrategy `protobuf:"varint,9,opt,name=query_strategy,json=queryStrategy,proto3,enum=xray.app.dns.QueryStrategy" json:"query_strategy,omitempty"`
+	DisableFallback bool          `protobuf:"varint,10,opt,name=disableFallback,proto3" json:"disableFallback,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -252,6 +370,27 @@ func (x *Config) GetTag() string {
 	return ""
 }
 
+func (x *Config) GetCacheStrategy() CacheStrategy {
+	if x != nil {
+		return x.CacheStrategy
+	}
+	return CacheStrategy_Cache_ALL
+}
+
+func (x *Config) GetQueryStrategy() QueryStrategy {
+	if x != nil {
+		return x.QueryStrategy
+	}
+	return QueryStrategy_USE_IP
+}
+
+func (x *Config) GetDisableFallback() bool {
+	if x != nil {
+		return x.DisableFallback
+	}
+	return false
+}
+
 type NameServer_PriorityDomain struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -371,8 +510,7 @@ type Config_HostMapping struct {
 	Domain string             `protobuf:"bytes,2,opt,name=domain,proto3" json:"domain,omitempty"`
 	Ip     [][]byte           `protobuf:"bytes,3,rep,name=ip,proto3" json:"ip,omitempty"`
 	// ProxiedDomain indicates the mapped domain has the same IP address on this
-	// domain. Xray will use this domain for IP queries. This field is only
+	// domain. Xray will use this domain for IP queries.
-	// effective if ip is empty.
 	ProxiedDomain string `protobuf:"bytes,4,opt,name=proxied_domain,json=proxiedDomain,proto3" json:"proxied_domain,omitempty"`
 }
 
@@ -446,77 +584,101 @@ var file_app_dns_config_proto_rawDesc = []byte{
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 }
 
 var (
@@ -531,37 +693,41 @@ func file_app_dns_config_proto_rawDescGZIP() []byte {
 	return file_app_dns_config_proto_rawDescData
 }
 
-var file_app_dns_config_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_app_dns_config_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
 var file_app_dns_config_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
 var file_app_dns_config_proto_goTypes = []interface{}{
 	(DomainMatchingType)(0),           // 0: xray.app.dns.DomainMatchingType
-	(*NameServer)(nil),                // 1: xray.app.dns.NameServer
+	(QueryStrategy)(0),                // 1: xray.app.dns.QueryStrategy
-	(*Config)(nil),                    // 2: xray.app.dns.Config
+	(CacheStrategy)(0),                // 2: xray.app.dns.CacheStrategy
-	(*NameServer_PriorityDomain)(nil), // 3: xray.app.dns.NameServer.PriorityDomain
+	(*NameServer)(nil),                // 3: xray.app.dns.NameServer
-	(*NameServer_OriginalRule)(nil),   // 4: xray.app.dns.NameServer.OriginalRule
+	(*Config)(nil),                    // 4: xray.app.dns.Config
-	nil,                               // 5: xray.app.dns.Config.HostsEntry
+	(*NameServer_PriorityDomain)(nil), // 5: xray.app.dns.NameServer.PriorityDomain
-	(*Config_HostMapping)(nil),        // 6: xray.app.dns.Config.HostMapping
+	(*NameServer_OriginalRule)(nil),   // 6: xray.app.dns.NameServer.OriginalRule
-	(*net.Endpoint)(nil),              // 7: xray.common.net.Endpoint
+	nil,                               // 7: xray.app.dns.Config.HostsEntry
-	(*router.GeoIP)(nil),              // 8: xray.app.router.GeoIP
+	(*Config_HostMapping)(nil),        // 8: xray.app.dns.Config.HostMapping
-	(*net.IPOrDomain)(nil),            // 9: xray.common.net.IPOrDomain
+	(*net.Endpoint)(nil),              // 9: xray.common.net.Endpoint
+	(*router.GeoIP)(nil),              // 10: xray.app.router.GeoIP
+	(*net.IPOrDomain)(nil),            // 11: xray.common.net.IPOrDomain
 }
 var file_app_dns_config_proto_depIdxs = []int32{
-	7,  // 0: xray.app.dns.NameServer.address:type_name -> xray.common.net.Endpoint
+	9,  // 0: xray.app.dns.NameServer.address:type_name -> xray.common.net.Endpoint
-	3,  // 1: xray.app.dns.NameServer.prioritized_domain:type_name -> xray.app.dns.NameServer.PriorityDomain
+	5,  // 1: xray.app.dns.NameServer.prioritized_domain:type_name -> xray.app.dns.NameServer.PriorityDomain
-	8,  // 2: xray.app.dns.NameServer.geoip:type_name -> xray.app.router.GeoIP
+	10, // 2: xray.app.dns.NameServer.geoip:type_name -> xray.app.router.GeoIP
-	4,  // 3: xray.app.dns.NameServer.original_rules:type_name -> xray.app.dns.NameServer.OriginalRule
+	6,  // 3: xray.app.dns.NameServer.original_rules:type_name -> xray.app.dns.NameServer.OriginalRule
-	7,  // 4: xray.app.dns.Config.NameServers:type_name -> xray.common.net.Endpoint
+	9,  // 4: xray.app.dns.Config.NameServers:type_name -> xray.common.net.Endpoint
-	1,  // 5: xray.app.dns.Config.name_server:type_name -> xray.app.dns.NameServer
+	3,  // 5: xray.app.dns.Config.name_server:type_name -> xray.app.dns.NameServer
-	5,  // 6: xray.app.dns.Config.Hosts:type_name -> xray.app.dns.Config.HostsEntry
+	7,  // 6: xray.app.dns.Config.Hosts:type_name -> xray.app.dns.Config.HostsEntry
-	6,  // 7: xray.app.dns.Config.static_hosts:type_name -> xray.app.dns.Config.HostMapping
+	8,  // 7: xray.app.dns.Config.static_hosts:type_name -> xray.app.dns.Config.HostMapping
-	0,  // 8: xray.app.dns.NameServer.PriorityDomain.type:type_name -> xray.app.dns.DomainMatchingType
+	2,  // 8: xray.app.dns.Config.cache_strategy:type_name -> xray.app.dns.CacheStrategy
-	9,  // 9: xray.app.dns.Config.HostsEntry.value:type_name -> xray.common.net.IPOrDomain
+	1,  // 9: xray.app.dns.Config.query_strategy:type_name -> xray.app.dns.QueryStrategy
-	0,  // 10: xray.app.dns.Config.HostMapping.type:type_name -> xray.app.dns.DomainMatchingType
+	0,  // 10: xray.app.dns.NameServer.PriorityDomain.type:type_name -> xray.app.dns.DomainMatchingType
-	11, // [11:11] is the sub-list for method output_type
+	11, // 11: xray.app.dns.Config.HostsEntry.value:type_name -> xray.common.net.IPOrDomain
-	11, // [11:11] is the sub-list for method input_type
+	0,  // 12: xray.app.dns.Config.HostMapping.type:type_name -> xray.app.dns.DomainMatchingType
-	11, // [11:11] is the sub-list for extension type_name
+	13, // [13:13] is the sub-list for method output_type
-	11, // [11:11] is the sub-list for extension extendee
+	13, // [13:13] is the sub-list for method input_type
-	0,  // [0:11] is the sub-list for field type_name
+	13, // [13:13] is the sub-list for extension type_name
+	13, // [13:13] is the sub-list for extension extendee
+	0,  // [0:13] is the sub-list for field type_name
 }
 
 func init() { file_app_dns_config_proto_init() }
@@ -636,7 +802,7 @@ func file_app_dns_config_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_dns_config_proto_rawDesc,
-			NumEnums:      1,
+			NumEnums:      3,
 			NumMessages:   6,
 			NumExtensions: 0,
 			NumServices:   0,

app/dns/config.proto

@@ -12,6 +12,8 @@ import "app/router/config.proto";
 
 message NameServer {
   xray.common.net.Endpoint address = 1;
+  bytes client_ip = 5;
+  bool skipFallback = 6;
 
   message PriorityDomain {
     DomainMatchingType type = 1;
@@ -35,6 +37,18 @@ enum DomainMatchingType {
   Regex = 3;
 }
 
+enum QueryStrategy {
+  USE_IP = 0;
+  USE_IP4 = 1;
+  USE_IP6 = 2;
+}
+
+enum CacheStrategy {
+  Cache_ALL = 0;
+  Cache_NOERROR = 1;
+  Cache_DISABLE = 2;
+}
+
 message Config {
   // Nameservers used by this DNS. Only traditional UDP servers are support at
   // the moment. A special value 'localhost' as a domain address can be set to
@@ -59,8 +73,7 @@ message Config {
     repeated bytes ip = 3;
 
     // ProxiedDomain indicates the mapped domain has the same IP address on this
-    // domain. Xray will use this domain for IP queries. This field is only
+    // domain. Xray will use this domain for IP queries.
-    // effective if ip is empty.
     string proxied_domain = 4;
   }
 
@@ -70,4 +83,11 @@ message Config {
   string tag = 6;
 
   reserved 7;
+
+  // DisableCache disables DNS cache
+  CacheStrategy cache_strategy = 8;
+
+  QueryStrategy query_strategy = 9;
+
+  bool disableFallback = 10;
 }

app/dns/dns.go

@@ -2,3 +2,312 @@
 package dns
 
 //go:generate go run github.com/xtls/xray-core/common/errors/errorgen
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"sync"
+
+	"github.com/xtls/xray-core/app/router"
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/strmatcher"
+	"github.com/xtls/xray-core/features"
+	"github.com/xtls/xray-core/features/dns"
+)
+
+// DNS is a DNS rely server.
+type DNS struct {
+	sync.Mutex
+	tag             string
+	cacheStrategy   CacheStrategy
+	disableFallback bool
+	ipOption        *dns.IPOption
+	hosts           *StaticHosts
+	clients         []*Client
+	ctx             context.Context
+	domainMatcher   strmatcher.IndexMatcher
+	matcherInfos    []DomainMatcherInfo
+}
+
+// DomainMatcherInfo contains information attached to index returned by Server.domainMatcher
+type DomainMatcherInfo struct {
+	clientIdx     uint16
+	domainRuleIdx uint16
+}
+
+// New creates a new DNS server with given configuration.
+func New(ctx context.Context, config *Config) (*DNS, error) {
+	var tag string
+	if len(config.Tag) > 0 {
+		tag = config.Tag
+	} else {
+		tag = generateRandomTag()
+	}
+
+	var clientIP net.IP
+	switch len(config.ClientIp) {
+	case 0, net.IPv4len, net.IPv6len:
+		clientIP = net.IP(config.ClientIp)
+	default:
+		return nil, newError("unexpected client IP length ", len(config.ClientIp))
+	}
+
+	var ipOption *dns.IPOption
+	switch config.QueryStrategy {
+	case QueryStrategy_USE_IP:
+		ipOption = &dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		}
+	case QueryStrategy_USE_IP4:
+		ipOption = &dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: false,
+			FakeEnable: false,
+		}
+	case QueryStrategy_USE_IP6:
+		ipOption = &dns.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: true,
+			FakeEnable: false,
+		}
+	}
+
+	hosts, err := NewStaticHosts(config.StaticHosts, config.Hosts)
+	if err != nil {
+		return nil, newError("failed to create hosts").Base(err)
+	}
+
+	clients := []*Client{}
+	domainRuleCount := 0
+	for _, ns := range config.NameServer {
+		domainRuleCount += len(ns.PrioritizedDomain)
+	}
+
+	// MatcherInfos is ensured to cover the maximum index domainMatcher could return, where matcher's index starts from 1
+	matcherInfos := make([]DomainMatcherInfo, domainRuleCount+1)
+	domainMatcher := &strmatcher.MatcherGroup{}
+	geoipContainer := router.GeoIPMatcherContainer{}
+
+	for _, endpoint := range config.NameServers {
+		features.PrintDeprecatedFeatureWarning("simple DNS server")
+		client, err := NewSimpleClient(ctx, endpoint, clientIP)
+		if err != nil {
+			return nil, newError("failed to create client").Base(err)
+		}
+		clients = append(clients, client)
+	}
+
+	for _, ns := range config.NameServer {
+		clientIdx := len(clients)
+		updateDomain := func(domainRule strmatcher.Matcher, originalRuleIdx int, matcherInfos []DomainMatcherInfo) error {
+			midx := domainMatcher.Add(domainRule)
+			matcherInfos[midx] = DomainMatcherInfo{
+				clientIdx:     uint16(clientIdx),
+				domainRuleIdx: uint16(originalRuleIdx),
+			}
+			return nil
+		}
+
+		myClientIP := clientIP
+		switch len(ns.ClientIp) {
+		case net.IPv4len, net.IPv6len:
+			myClientIP = net.IP(ns.ClientIp)
+		}
+		client, err := NewClient(ctx, ns, myClientIP, geoipContainer, &matcherInfos, updateDomain)
+		if err != nil {
+			return nil, newError("failed to create client").Base(err)
+		}
+		clients = append(clients, client)
+	}
+
+	// If there is no DNS client in config, add a `localhost` DNS client
+	if len(clients) == 0 {
+		clients = append(clients, NewLocalDNSClient())
+	}
+
+	return &DNS{
+		tag:             tag,
+		hosts:           hosts,
+		ipOption:        ipOption,
+		clients:         clients,
+		ctx:             ctx,
+		domainMatcher:   domainMatcher,
+		matcherInfos:    matcherInfos,
+		cacheStrategy:   config.CacheStrategy,
+		disableFallback: config.DisableFallback,
+	}, nil
+}
+
+// Type implements common.HasType.
+func (*DNS) Type() interface{} {
+	return dns.ClientType()
+}
+
+// Start implements common.Runnable.
+func (s *DNS) Start() error {
+	return nil
+}
+
+// Close implements common.Closable.
+func (s *DNS) Close() error {
+	return nil
+}
+
+// IsOwnLink implements proxy.dns.ownLinkVerifier
+func (s *DNS) IsOwnLink(ctx context.Context) bool {
+	inbound := session.InboundFromContext(ctx)
+	return inbound != nil && inbound.Tag == s.tag
+}
+
+// LookupIP implements dns.Client.
+func (s *DNS) LookupIP(domain string) ([]net.IP, error) {
+	return s.lookupIPInternal(domain, s.ipOption.Copy())
+}
+
+// LookupOptions implements dns.Client.
+func (s *DNS) LookupOptions(domain string, opts ...dns.Option) ([]net.IP, error) {
+	opt := s.ipOption.Copy()
+	for _, o := range opts {
+		if o != nil {
+			o(opt)
+		}
+	}
+
+	return s.lookupIPInternal(domain, opt)
+}
+
+// LookupIPv4 implements dns.IPv4Lookup.
+func (s *DNS) LookupIPv4(domain string) ([]net.IP, error) {
+	return s.lookupIPInternal(domain, &dns.IPOption{
+		IPv4Enable: true,
+	})
+}
+
+// LookupIPv6 implements dns.IPv6Lookup.
+func (s *DNS) LookupIPv6(domain string) ([]net.IP, error) {
+	return s.lookupIPInternal(domain, &dns.IPOption{
+		IPv6Enable: true,
+	})
+}
+
+func (s *DNS) lookupIPInternal(domain string, option *dns.IPOption) ([]net.IP, error) {
+	if domain == "" {
+		return nil, newError("empty domain name")
+	}
+	if isQuery(option) {
+		return nil, newError("empty option: Impossible.").AtWarning()
+	}
+
+	// Normalize the FQDN form query
+	if strings.HasSuffix(domain, ".") {
+		domain = domain[:len(domain)-1]
+	}
+
+	// Static host lookup
+	switch addrs := s.hosts.Lookup(domain, option); {
+	case addrs == nil: // Domain not recorded in static host
+		break
+	case len(addrs) == 0: // Domain recorded, but no valid IP returned (e.g. IPv4 address with only IPv6 enabled)
+		return nil, dns.ErrEmptyResponse
+	case len(addrs) == 1 && addrs[0].Family().IsDomain(): // Domain replacement
+		newError("domain replaced: ", domain, " -> ", addrs[0].Domain()).WriteToLog()
+		domain = addrs[0].Domain()
+	default:
+		// Successfully found ip records in static host.
+		// Skip hosts mapping result in FakeDNS query.
+		if isIPQuery(option) {
+			newError("returning ", len(addrs), " IP(s) for domain ", domain, " -> ", addrs).WriteToLog()
+			return toNetIP(addrs)
+		}
+	}
+
+	// Name servers lookup
+	errs := []error{}
+	ctx := session.ContextWithInbound(s.ctx, &session.Inbound{Tag: s.tag})
+	for _, client := range s.sortClients(domain, option) {
+		ips, err := client.QueryIP(ctx, domain, *option, s.cacheStrategy)
+		if len(ips) > 0 {
+			return ips, nil
+		}
+		if err != nil {
+			newError("failed to lookup ip for domain ", domain, " at server ", client.Name()).Base(err).WriteToLog()
+			errs = append(errs, err)
+		}
+		if err != context.Canceled && err != context.DeadlineExceeded && err != errExpectedIPNonMatch {
+			return nil, err
+		}
+	}
+
+	return nil, newError("returning nil for domain ", domain).Base(errors.Combine(errs...))
+}
+
+func (s *DNS) sortClients(domain string, option *dns.IPOption) []*Client {
+	clients := make([]*Client, 0, len(s.clients))
+	clientUsed := make([]bool, len(s.clients))
+	clientNames := make([]string, 0, len(s.clients))
+	domainRules := []string{}
+
+	defer func() {
+		if len(domainRules) > 0 {
+			newError("domain ", domain, " matches following rules: ", domainRules).AtDebug().WriteToLog()
+		}
+		if len(clientNames) > 0 {
+			newError("domain ", domain, " will use DNS in order: ", clientNames).AtDebug().WriteToLog()
+		}
+		if len(clients) == 0 {
+			clients = append(clients, s.clients[0])
+			clientNames = append(clientNames, s.clients[0].Name())
+			newError("domain ", domain, " will use the first DNS: ", clientNames).AtDebug().WriteToLog()
+		}
+	}()
+
+	// Priority domain matching
+	for _, match := range s.domainMatcher.Match(domain) {
+		info := s.matcherInfos[match]
+		client := s.clients[info.clientIdx]
+		domainRule := client.domains[info.domainRuleIdx]
+		if !canQueryOnClient(option, client) {
+			newError("skipping the client " + client.Name()).AtDebug().WriteToLog()
+			continue
+		}
+		domainRules = append(domainRules, fmt.Sprintf("%s(DNS idx:%d)", domainRule, info.clientIdx))
+		if clientUsed[info.clientIdx] {
+			continue
+		}
+		clientUsed[info.clientIdx] = true
+		clients = append(clients, client)
+		clientNames = append(clientNames, client.Name())
+	}
+
+	if !s.disableFallback {
+		// Default round-robin query
+		for idx, client := range s.clients {
+			if clientUsed[idx] || client.skipFallback {
+				continue
+			}
+
+			if !canQueryOnClient(option, client) {
+				newError("skipping the client " + client.Name()).AtDebug().WriteToLog()
+				continue
+			}
+
+			clientUsed[idx] = true
+			clients = append(clients, client)
+			clientNames = append(clientNames, client.Name())
+		}
+	}
+
+	return clients
+}
+
+func init() {
+	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
+		return New(ctx, config.(*Config))
+	}))
+}

app/dns/dns_test.go

@@ -154,11 +154,7 @@ func TestUDPServerSubnet(t *testing.T) {
 
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
-	ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+	ips, err := client.LookupIP("google.com")
-		IPv4Enable: true,
-		IPv6Enable: true,
-		FakeEnable: false,
-	})
 	if err != nil {
 		t.Fatal("unexpected error: ", err)
 	}
@@ -213,11 +209,7 @@ func TestUDPServer(t *testing.T) {
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
 	{
-		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -228,11 +220,7 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		ips, err := client.LookupIP("facebook.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("facebook.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -243,11 +231,7 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		_, err := client.LookupIP("notexist.google.com", feature_dns.IPOption{
+		_, err := client.LookupIP("notexist.google.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err == nil {
 			t.Fatal("nil error")
 		}
@@ -257,11 +241,8 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		ips, err := client.LookupIP("ipv4only.google.com", feature_dns.IPOption{
+		clientv6 := client.(feature_dns.IPv6Lookup)
-			IPv4Enable: false,
+		ips, err := clientv6.LookupIPv6("ipv4only.google.com")
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != feature_dns.ErrEmptyResponse {
 			t.Fatal("error: ", err)
 		}
@@ -273,11 +254,7 @@ func TestUDPServer(t *testing.T) {
 	dnsServer.Shutdown()
 
 	{
-		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -354,11 +331,7 @@ func TestPrioritizedDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{
-		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -417,12 +390,9 @@ func TestUDPServerIPv6(t *testing.T) {
 	common.Must(err)
 
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
+	client6 := client.(feature_dns.IPv6Lookup)
 	{
-		ips, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
+		ips, err := client6.LookupIPv6("ipv6.google.com")
-			IPv4Enable: false,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -485,11 +455,7 @@ func TestStaticHostDomain(t *testing.T) {
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
 	{
-		ips, err := client.LookupIP("example.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("example.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -596,11 +562,7 @@ func TestIPMatch(t *testing.T) {
 	startTime := time.Now()
 
 	{
-		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -719,11 +681,7 @@ func TestLocalDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{ // Will match dotless:
-		ips, err := client.LookupIP("hostname", feature_dns.IPOption{
+		ips, err := client.LookupIP("hostname")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -734,11 +692,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match domain:local
-		ips, err := client.LookupIP("hostname.local", feature_dns.IPOption{
+		ips, err := client.LookupIP("hostname.local")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -749,11 +703,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match static ip
-		ips, err := client.LookupIP("hostnamestatic", feature_dns.IPOption{
+		ips, err := client.LookupIP("hostnamestatic")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -764,11 +714,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match domain replacing
-		ips, err := client.LookupIP("hostnamealias", feature_dns.IPOption{
+		ips, err := client.LookupIP("hostnamealias")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -779,11 +725,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:localhost, but not expectIPs: 127.0.0.2, 127.0.0.3, then matches at dotless:
-		ips, err := client.LookupIP("localhost", feature_dns.IPOption{
+		ips, err := client.LookupIP("localhost")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -794,11 +736,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:localhost, and expectIPs: 127.0.0.2, 127.0.0.3
-		ips, err := client.LookupIP("localhost-a", feature_dns.IPOption{
+		ips, err := client.LookupIP("localhost-a")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -809,11 +747,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:localhost, and expectIPs: 127.0.0.2, 127.0.0.3
-		ips, err := client.LookupIP("localhost-b", feature_dns.IPOption{
+		ips, err := client.LookupIP("localhost-b")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -824,11 +758,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:
-		ips, err := client.LookupIP("Mijia Cloud", feature_dns.IPOption{
+		ips, err := client.LookupIP("Mijia Cloud")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -990,11 +920,7 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{ // Will match server 1,2 and server 1 returns expected ip
-		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -1005,11 +931,8 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 1,2 and server 1 returns unexpected ip, then server 2 returns expected one
-		ips, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
+		clientv4 := client.(feature_dns.IPv4Lookup)
-			IPv4Enable: true,
+		ips, err := clientv4.LookupIPv4("ipv6.google.com")
-			IPv6Enable: false,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -1020,11 +943,7 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 3,1,2 and server 3 returns expected one
-		ips, err := client.LookupIP("api.google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("api.google.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -1035,11 +954,7 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 4,3,1,2 and server 4 returns expected one
-		ips, err := client.LookupIP("v2.api.google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("v2.api.google.com")
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}

app/dns/hosts.go

@@ -14,25 +14,6 @@ type StaticHosts struct {
 	matchers *strmatcher.MatcherGroup
 }
 
-var typeMap = map[DomainMatchingType]strmatcher.Type{
-	DomainMatchingType_Full:      strmatcher.Full,
-	DomainMatchingType_Subdomain: strmatcher.Domain,
-	DomainMatchingType_Keyword:   strmatcher.Substr,
-	DomainMatchingType_Regex:     strmatcher.Regex,
-}
-
-func toStrMatcher(t DomainMatchingType, domain string) (strmatcher.Matcher, error) {
-	strMType, f := typeMap[t]
-	if !f {
-		return nil, newError("unknown mapping type", t).AtWarning()
-	}
-	matcher, err := strMType.New(domain)
-	if err != nil {
-		return nil, newError("failed to create str matcher").Base(err)
-	}
-	return matcher, nil
-}
-
 // NewStaticHosts creates a new StaticHosts instance.
 func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDomain) (*StaticHosts, error) {
 	g := new(strmatcher.MatcherGroup)
@@ -66,6 +47,9 @@ func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDoma
 		id := g.Add(matcher)
 		ips := make([]net.Address, 0, len(mapping.Ip)+1)
 		switch {
+		case len(mapping.ProxiedDomain) > 0:
+			ips = append(ips, net.DomainAddress(mapping.ProxiedDomain))
+
 		case len(mapping.Ip) > 0:
 			for _, ip := range mapping.Ip {
 				addr := net.IPAddress(ip)
@@ -75,49 +59,56 @@ func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDoma
 				ips = append(ips, addr)
 			}
 
-		case len(mapping.ProxiedDomain) > 0:
-			ips = append(ips, net.DomainAddress(mapping.ProxiedDomain))
-
 		default:
 			return nil, newError("neither IP address nor proxied domain specified for domain: ", mapping.Domain).AtWarning()
 		}
 
-		// Special handling for localhost IPv6. This is a dirty workaround as JSON config supports only single IP mapping.
-		if len(ips) == 1 && ips[0] == net.LocalHostIP {
-			ips = append(ips, net.LocalHostIPv6)
-		}
-
 		sh.ips[id] = ips
 	}
 
 	return sh, nil
 }
 
-func filterIP(ips []net.Address, option dns.IPOption) []net.Address {
+func filterIP(ips []net.Address, option *dns.IPOption) []net.Address {
 	filtered := make([]net.Address, 0, len(ips))
 	for _, ip := range ips {
 		if (ip.Family().IsIPv4() && option.IPv4Enable) || (ip.Family().IsIPv6() && option.IPv6Enable) {
 			filtered = append(filtered, ip)
 		}
 	}
-	if len(filtered) == 0 {
-		return nil
-	}
 	return filtered
 }
 
-// LookupIP returns IP address for the given domain, if exists in this StaticHosts.
+func (h *StaticHosts) lookupInternal(domain string) []net.Address {
-func (h *StaticHosts) LookupIP(domain string, option dns.IPOption) []net.Address {
+	var ips []net.Address
-	indices := h.matchers.Match(domain)
+	for _, id := range h.matchers.Match(domain) {
-	if len(indices) == 0 {
-		return nil
-	}
-	ips := []net.Address{}
-	for _, id := range indices {
 		ips = append(ips, h.ips[id]...)
 	}
 	if len(ips) == 1 && ips[0].Family().IsDomain() {
 		return ips
 	}
-	return filterIP(ips, option)
+	return ips
+}
+
+func (h *StaticHosts) lookup(domain string, option *dns.IPOption, maxDepth int) []net.Address {
+	switch addrs := h.lookupInternal(domain); {
+	case len(addrs) == 0: // Not recorded in static hosts, return nil
+		return nil
+	case len(addrs) == 1 && addrs[0].Family().IsDomain(): // Try to unwrap domain
+		newError("found replaced domain: ", domain, " -> ", addrs[0].Domain(), ". Try to unwrap it").AtDebug().WriteToLog()
+		if maxDepth > 0 {
+			unwrapped := h.lookup(addrs[0].Domain(), option, maxDepth-1)
+			if unwrapped != nil {
+				return unwrapped
+			}
+		}
+		return addrs
+	default: // IP record found, return a non-nil IP array
+		return filterIP(addrs, option)
+	}
+}
+
+// Lookup returns IP addresses or proxied domain for the given domain, if exists in this StaticHosts.
+func (h *StaticHosts) Lookup(domain string, option *dns.IPOption) []net.Address {
+	return h.lookup(domain, option, 5)
 }

app/dns/hosts_test.go

@@ -20,6 +20,20 @@ func TestStaticHosts(t *testing.T) {
 				{1, 1, 1, 1},
 			},
 		},
+		{
+			Type:   DomainMatchingType_Full,
+			Domain: "proxy.example.com",
+			Ip: [][]byte{
+				{1, 2, 3, 4},
+				{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
+			},
+			ProxiedDomain: "another-proxy.example.com",
+		},
+		{
+			Type:          DomainMatchingType_Full,
+			Domain:        "proxy2.example.com",
+			ProxiedDomain: "proxy.example.com",
+		},
 		{
 			Type:   DomainMatchingType_Subdomain,
 			Domain: "example.cn",
@@ -32,6 +46,7 @@ func TestStaticHosts(t *testing.T) {
 			Domain: "baidu.com",
 			Ip: [][]byte{
 				{127, 0, 0, 1},
+				{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
 			},
 		},
 	}
@@ -40,7 +55,7 @@ func TestStaticHosts(t *testing.T) {
 	common.Must(err)
 
 	{
-		ips := hosts.LookupIP("example.com", dns.IPOption{
+		ips := hosts.Lookup("example.com", &dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 		})
@@ -53,7 +68,33 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		ips := hosts.LookupIP("www.example.cn", dns.IPOption{
+		domain := hosts.Lookup("proxy.example.com", &dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: false,
+		})
+		if len(domain) != 1 {
+			t.Error("expect 1 domain, but got ", len(domain))
+		}
+		if diff := cmp.Diff(domain[0].Domain(), "another-proxy.example.com"); diff != "" {
+			t.Error(diff)
+		}
+	}
+
+	{
+		domain := hosts.Lookup("proxy2.example.com", &dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: false,
+		})
+		if len(domain) != 1 {
+			t.Error("expect 1 domain, but got ", len(domain))
+		}
+		if diff := cmp.Diff(domain[0].Domain(), "another-proxy.example.com"); diff != "" {
+			t.Error(diff)
+		}
+	}
+
+	{
+		ips := hosts.Lookup("www.example.cn", &dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 		})
@@ -66,7 +107,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		ips := hosts.LookupIP("baidu.com", dns.IPOption{
+		ips := hosts.Lookup("baidu.com", &dns.IPOption{
 			IPv4Enable: false,
 			IPv6Enable: true,
 		})

app/dns/nameserver.go

@@ -2,40 +2,211 @@ package dns
 
 import (
 	"context"
+	"net/url"
+	"strings"
+	"time"
 
+	"github.com/xtls/xray-core/app/router"
+	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/strmatcher"
+	core "github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/dns"
-	"github.com/xtls/xray-core/features/dns/localdns"
+	"github.com/xtls/xray-core/features/routing"
 )
 
-// Client is the interface for DNS client.
+// Server is the interface for Name Server.
-type Client interface {
+type Server interface {
 	// Name of the Client.
 	Name() string
-
 	// QueryIP sends IP queries to its configured server.
-	QueryIP(ctx context.Context, domain string, option dns.IPOption) ([]net.IP, error)
+	QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns.IPOption, cs CacheStrategy) ([]net.IP, error)
 }
 
-type LocalNameServer struct {
+// Client is the interface for DNS client.
-	client *localdns.Client
+type Client struct {
+	server       Server
+	clientIP     net.IP
+	skipFallback bool
+	domains      []string
+	expectIPs    []*router.GeoIPMatcher
 }
 
-func (s *LocalNameServer) QueryIP(_ context.Context, domain string, option dns.IPOption) ([]net.IP, error) {
+var errExpectedIPNonMatch = errors.New("expectIPs not match")
-	if option.IPv4Enable || option.IPv6Enable {
+
-		return s.client.LookupIP(domain, option)
+// NewServer creates a name server object according to the network destination url.
+func NewServer(dest net.Destination, dispatcher routing.Dispatcher) (Server, error) {
+	if address := dest.Address; address.Family().IsDomain() {
+		u, err := url.Parse(address.Domain())
+		if err != nil {
+			return nil, err
+		}
+		switch {
+		case strings.EqualFold(u.String(), "localhost"):
+			return NewLocalNameServer(), nil
+		case strings.EqualFold(u.Scheme, "https"): // DOH Remote mode
+			return NewDoHNameServer(u, dispatcher)
+		case strings.EqualFold(u.Scheme, "https+local"): // DOH Local mode
+			return NewDoHLocalNameServer(u), nil
+		case strings.EqualFold(u.Scheme, "quic+local"): // DNS-over-QUIC Local mode
+			return NewQUICNameServer(u)
+		case strings.EqualFold(u.String(), "fakedns"):
+			return NewFakeDNSServer(), nil
+		}
+	}
+	if dest.Network == net.Network_Unknown {
+		dest.Network = net.Network_UDP
+	}
+	if dest.Network == net.Network_UDP { // UDP classic DNS mode
+		return NewClassicNameServer(dest, dispatcher), nil
+	}
+	return nil, newError("No available name server could be created from ", dest).AtWarning()
 }
 
-	return nil, newError("neither IPv4 nor IPv6 is enabled")
+// NewClient creates a DNS client managing a name server with client IP, domain rules and expected IPs.
+func NewClient(ctx context.Context, ns *NameServer, clientIP net.IP, container router.GeoIPMatcherContainer, matcherInfos *[]DomainMatcherInfo, updateDomainRule func(strmatcher.Matcher, int, []DomainMatcherInfo) error) (*Client, error) {
+	client := &Client{}
+
+	err := core.RequireFeatures(ctx, func(dispatcher routing.Dispatcher) error {
+		// Create a new server for each client for now
+		server, err := NewServer(ns.Address.AsDestination(), dispatcher)
+		if err != nil {
+			return newError("failed to create nameserver").Base(err).AtWarning()
 		}
 
-func (s *LocalNameServer) Name() string {
+		// Priotize local domains with specific TLDs or without any dot to local DNS
-	return "localhost"
+		if _, isLocalDNS := server.(*LocalNameServer); isLocalDNS {
+			ns.PrioritizedDomain = append(ns.PrioritizedDomain, localTLDsAndDotlessDomains...)
+			ns.OriginalRules = append(ns.OriginalRules, localTLDsAndDotlessDomainsRule)
+			// The following lines is a solution to avoid core panics（rule index out of range） when setting `localhost` DNS client in config.
+			// Because the `localhost` DNS client will apend len(localTLDsAndDotlessDomains) rules into matcherInfos to match `geosite:private` default rule.
+			// But `matcherInfos` has no enough length to add rules, which leads to core panics (rule index out of range).
+			// To avoid this, the length of `matcherInfos` must be equal to the expected, so manually append it with Golang default zero value first for later modification.
+			for i := 0; i < len(localTLDsAndDotlessDomains); i++ {
+				*matcherInfos = append(*matcherInfos, DomainMatcherInfo{
+					clientIdx:     uint16(0),
+					domainRuleIdx: uint16(0),
+				})
+			}
 		}
 
-func NewLocalNameServer() *LocalNameServer {
+		// Establish domain rules
-	newError("DNS: created localhost client").AtInfo().WriteToLog()
+		var rules []string
-	return &LocalNameServer{
+		ruleCurr := 0
-		client: localdns.New(),
+		ruleIter := 0
+		for _, domain := range ns.PrioritizedDomain {
+			domainRule, err := toStrMatcher(domain.Type, domain.Domain)
+			if err != nil {
+				return newError("failed to create prioritized domain").Base(err).AtWarning()
+			}
+			originalRuleIdx := ruleCurr
+			if ruleCurr < len(ns.OriginalRules) {
+				rule := ns.OriginalRules[ruleCurr]
+				if ruleCurr >= len(rules) {
+					rules = append(rules, rule.Rule)
+				}
+				ruleIter++
+				if ruleIter >= int(rule.Size) {
+					ruleIter = 0
+					ruleCurr++
+				}
+			} else { // No original rule, generate one according to current domain matcher (majorly for compatibility with tests)
+				rules = append(rules, domainRule.String())
+				ruleCurr++
+			}
+			err = updateDomainRule(domainRule, originalRuleIdx, *matcherInfos)
+			if err != nil {
+				return newError("failed to create prioritized domain").Base(err).AtWarning()
 			}
 		}
+
+		// Establish expected IPs
+		var matchers []*router.GeoIPMatcher
+		for _, geoip := range ns.Geoip {
+			matcher, err := container.Add(geoip)
+			if err != nil {
+				return newError("failed to create ip matcher").Base(err).AtWarning()
+			}
+			matchers = append(matchers, matcher)
+		}
+
+		if len(clientIP) > 0 {
+			switch ns.Address.Address.GetAddress().(type) {
+			case *net.IPOrDomain_Domain:
+				newError("DNS: client ", ns.Address.Address.GetDomain(), " uses clientIP ", clientIP.String()).AtInfo().WriteToLog()
+			case *net.IPOrDomain_Ip:
+				newError("DNS: client ", ns.Address.Address.GetIp(), " uses clientIP ", clientIP.String()).AtInfo().WriteToLog()
+			}
+		}
+
+		client.server = server
+		client.clientIP = clientIP
+		client.domains = rules
+		client.expectIPs = matchers
+		return nil
+	})
+	return client, err
+}
+
+// NewSimpleClient creates a DNS client with a simple destination.
+func NewSimpleClient(ctx context.Context, endpoint *net.Endpoint, clientIP net.IP) (*Client, error) {
+	client := &Client{}
+	err := core.RequireFeatures(ctx, func(dispatcher routing.Dispatcher) error {
+		server, err := NewServer(endpoint.AsDestination(), dispatcher)
+		if err != nil {
+			return newError("failed to create nameserver").Base(err).AtWarning()
+		}
+		client.server = server
+		client.clientIP = clientIP
+		return nil
+	})
+
+	if len(clientIP) > 0 {
+		switch endpoint.Address.GetAddress().(type) {
+		case *net.IPOrDomain_Domain:
+			newError("DNS: client ", endpoint.Address.GetDomain(), " uses clientIP ", clientIP.String()).AtInfo().WriteToLog()
+		case *net.IPOrDomain_Ip:
+			newError("DNS: client ", endpoint.Address.GetIp(), " uses clientIP ", clientIP.String()).AtInfo().WriteToLog()
+		}
+	}
+
+	return client, err
+}
+
+// Name returns the server name the client manages.
+func (c *Client) Name() string {
+	return c.server.Name()
+}
+
+// QueryIP send DNS query to the name server with the client's IP.
+func (c *Client) QueryIP(ctx context.Context, domain string, option dns.IPOption, cs CacheStrategy) ([]net.IP, error) {
+	ctx, cancel := context.WithTimeout(ctx, 4*time.Second)
+	ips, err := c.server.QueryIP(ctx, domain, c.clientIP, option, cs)
+	cancel()
+
+	if err != nil {
+		return ips, err
+	}
+	return c.MatchExpectedIPs(domain, ips)
+}
+
+// MatchExpectedIPs matches queried domain IPs with expected IPs and returns matched ones.
+func (c *Client) MatchExpectedIPs(domain string, ips []net.IP) ([]net.IP, error) {
+	if len(c.expectIPs) == 0 {
+		return ips, nil
+	}
+	newIps := []net.IP{}
+	for _, ip := range ips {
+		for _, matcher := range c.expectIPs {
+			if matcher.Match(ip) {
+				newIps = append(newIps, ip)
+				break
+			}
+		}
+	}
+	if len(newIps) == 0 {
+		return nil, errExpectedIPNonMatch
+	}
+	newError("domain ", domain, " expectIPs ", newIps, " matched at server ", c.Name()).AtDebug().WriteToLog()
+	return newIps, nil
+}

app/dns/nameserver_doh.go

@@ -42,10 +42,10 @@ type DoHNameServer struct {
 	name       string
 }
 
-// NewDoHNameServer creates DOH client object for remote resolving
+// NewDoHNameServer creates DOH server object for remote resolving
-func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher, clientIP net.IP) (*DoHNameServer, error) {
+func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher) (*DoHNameServer, error) {
 	newError("DNS: created Remote DOH client for ", url.String()).AtInfo().WriteToLog()
-	s := baseDOHNameServer(url, "DOH", clientIP)
+	s := baseDOHNameServer(url, "DOH")
 
 	s.dispatcher = dispatcher
 	tr := &http.Transport{
@@ -80,6 +80,12 @@ func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher, clientIP net.
 			if err != nil {
 				return nil, err
 			}
+			log.Record(&log.AccessMessage{
+				From:   "DoH",
+				To:     s.dohURL,
+				Status: log.AccessAccepted,
+				Detour: "local",
+			})
 
 			cc := common.ChainedClosable{}
 			if cw, ok := link.Writer.(common.Closable); ok {
@@ -104,9 +110,9 @@ func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher, clientIP net.
 }
 
 // NewDoHLocalNameServer creates DOH client object for local resolving
-func NewDoHLocalNameServer(url *url.URL, clientIP net.IP) *DoHNameServer {
+func NewDoHLocalNameServer(url *url.URL) *DoHNameServer {
 	url.Scheme = "https"
-	s := baseDOHNameServer(url, "DOHL", clientIP)
+	s := baseDOHNameServer(url, "DOHL")
 	tr := &http.Transport{
 		IdleConnTimeout:   90 * time.Second,
 		ForceAttemptHTTP2: true,
@@ -136,10 +142,9 @@ func NewDoHLocalNameServer(url *url.URL, clientIP net.IP) *DoHNameServer {
 	return s
 }
 
-func baseDOHNameServer(url *url.URL, prefix string, clientIP net.IP) *DoHNameServer {
+func baseDOHNameServer(url *url.URL, prefix string) *DoHNameServer {
 	s := &DoHNameServer{
 		ips:    make(map[string]record),
-		clientIP: clientIP,
 		pub:    pubsub.NewService(),
 		name:   prefix + "//" + url.Host,
 		dohURL: url.String(),
@@ -152,7 +157,7 @@ func baseDOHNameServer(url *url.URL, prefix string, clientIP net.IP) *DoHNameSer
 	return s
 }
 
-// Name returns client name
+// Name implements Server.
 func (s *DoHNameServer) Name() string {
 	return s.name
 }
@@ -235,7 +240,7 @@ func (s *DoHNameServer) newReqID() uint16 {
 	return uint16(atomic.AddUint32(&s.reqID, 1))
 }
 
-func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, option dns_feature.IPOption) {
+func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
 	newError(s.name, " querying: ", domain).AtInfo().WriteToLog(session.ExportIDToError(ctx))
 
 	if s.name+"." == "DOH//"+domain {
@@ -243,7 +248,7 @@ func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, option dns
 		return
 	}
 
-	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP))
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
 
 	var deadline time.Time
 	if d, ok := ctx.Deadline(); ok {
@@ -265,7 +270,7 @@ func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, option dns
 
 			dnsCtx = session.ContextWithContent(dnsCtx, &session.Content{
 				Protocol:       "https",
-				//SkipRoutePick: true,
+				SkipDNSResolve: true,
 			})
 
 			// forced to use mux for DOH
@@ -349,7 +354,7 @@ func (s *DoHNameServer) findIPsForDomain(domain string, option dns_feature.IPOpt
 	}
 
 	if len(ips) > 0 {
-		return toNetIP(ips), nil
+		return toNetIP(ips)
 	}
 
 	if lastErr != nil {
@@ -363,16 +368,22 @@ func (s *DoHNameServer) findIPsForDomain(domain string, option dns_feature.IPOpt
 	return nil, errRecordNotFound
 }
 
-// QueryIP is called from dns.Server->queryIPTimeout
+// QueryIP implements Server.
-func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, error) { // nolint: dupl
+func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, cs CacheStrategy) ([]net.IP, error) { // nolint: dupl
 	fqdn := Fqdn(domain)
 
+	if cs == CacheStrategy_Cache_DISABLE {
+		newError("DNS cache is disabled. Querying IP for ", domain, " at ", s.name).AtDebug().WriteToLog()
+	} else {
 		ips, err := s.findIPsForDomain(fqdn, option)
 		if err != errRecordNotFound {
+			if cs == CacheStrategy_Cache_NOERROR && err == nil {
 				newError(s.name, " cache HIT ", domain, " -> ", ips).Base(err).AtDebug().WriteToLog()
 				log.Record(&log.DNSLog{s.name, domain, ips, log.DNSCacheHit, 0, err})
 				return ips, err
 			}
+		}
+	}
 
 	// ipv4 and ipv6 belong to different subscription groups
 	var sub4, sub6 *pubsub.Subscriber
@@ -400,7 +411,7 @@ func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, option dns_f
 		}
 		close(done)
 	}()
-	s.sendQuery(ctx, fqdn, option)
+	s.sendQuery(ctx, fqdn, clientIP, option)
 	start := time.Now()
 
 	for {

app/dns/nameserver_doh_test.go

@@ -0,0 +1,60 @@
+package dns_test
+
+import (
+	"context"
+	"net/url"
+	"testing"
+	"time"
+
+	"github.com/google/go-cmp/cmp"
+
+	. "github.com/xtls/xray-core/app/dns"
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
+	dns_feature "github.com/xtls/xray-core/features/dns"
+)
+
+func TestDOHNameServer(t *testing.T) {
+	url, err := url.Parse("https+local://1.1.1.1/dns-query")
+	common.Must(err)
+
+	s := NewDoHLocalNameServer(url)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+	}, CacheStrategy_Cache_ALL)
+	cancel()
+	common.Must(err)
+	if len(ips) == 0 {
+		t.Error("expect some ips, but got 0")
+	}
+}
+
+func TestDOHNameServerWithCache(t *testing.T) {
+	url, err := url.Parse("https+local://1.1.1.1/dns-query")
+	common.Must(err)
+
+	s := NewDoHLocalNameServer(url)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+	}, CacheStrategy_Cache_ALL)
+	cancel()
+	common.Must(err)
+	if len(ips) == 0 {
+		t.Error("expect some ips, but got 0")
+	}
+
+	ctx2, cancel := context.WithTimeout(context.Background(), time.Second*2)
+	ips2, err := s.QueryIP(ctx2, "google.com", net.IP(nil), dns_feature.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+	}, CacheStrategy_Cache_ALL)
+	cancel()
+	common.Must(err)
+	if r := cmp.Diff(ips2, ips); r != "" {
+		t.Fatal(r)
+	}
+}

app/dns/nameserver_fakedns.go

@@ -16,11 +16,13 @@ func NewFakeDNSServer() *FakeDNSServer {
 	return &FakeDNSServer{}
 }
 
+const FakeDNSName = "FakeDNS"
+
 func (FakeDNSServer) Name() string {
-	return "FakeDNS"
+	return FakeDNSName
 }
 
-func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, _ dns.IPOption) ([]net.IP, error) {
+func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, _ net.IP, _ dns.IPOption, _ CacheStrategy) ([]net.IP, error) {
 	if f.fakeDNSEngine == nil {
 		if err := core.RequireFeatures(ctx, func(fd dns.FakeDNSEngine) {
 			f.fakeDNSEngine = fd
@@ -30,9 +32,9 @@ func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, _ dns.IPOpti
 	}
 	ips := f.fakeDNSEngine.GetFakeIPForDomain(domain)
 
-	netIP := toNetIP(ips)
+	netIP, err := toNetIP(ips)
-	if netIP == nil {
+	if err != nil {
-		return nil, newError("Unable to convert IP to net ip").AtError()
+		return nil, newError("Unable to convert IP to net ip").Base(err).AtError()
 	}
 
 	newError(f.Name(), " got answer: ", domain, " -> ", ips).AtInfo().WriteToLog()

app/dns/nameserver_local.go

@@ -0,0 +1,53 @@
+package dns
+
+import (
+	"context"
+
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/features/dns"
+	"github.com/xtls/xray-core/features/dns/localdns"
+)
+
+// LocalNameServer is an wrapper over local DNS feature.
+type LocalNameServer struct {
+	client *localdns.Client
+}
+
+// QueryIP implements Server.
+func (s *LocalNameServer) QueryIP(_ context.Context, domain string, _ net.IP, option dns.IPOption, _ CacheStrategy) ([]net.IP, error) {
+	var ips []net.IP
+	var err error
+
+	switch {
+	case option.IPv4Enable && option.IPv6Enable:
+		ips, err = s.client.LookupIP(domain)
+	case option.IPv4Enable:
+		ips, err = s.client.LookupIPv4(domain)
+	case option.IPv6Enable:
+		ips, err = s.client.LookupIPv6(domain)
+	}
+
+	if len(ips) > 0 {
+		newError("Localhost got answer: ", domain, " -> ", ips).AtInfo().WriteToLog()
+	}
+
+	return ips, err
+}
+
+// Name implements Server.
+func (s *LocalNameServer) Name() string {
+	return "localhost"
+}
+
+// NewLocalNameServer creates localdns server object for directly lookup in system DNS.
+func NewLocalNameServer() *LocalNameServer {
+	newError("DNS: created localhost client").AtInfo().WriteToLog()
+	return &LocalNameServer{
+		client: localdns.New(),
+	}
+}
+
+// NewLocalDNSClient creates localdns client object for directly lookup in system DNS.
+func NewLocalDNSClient() *Client {
+	return &Client{server: NewLocalNameServer()}
+}

app/dns/nameserver_local_test.go

@@ -7,17 +7,17 @@ import (
 
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/common"
-	dns_feature "github.com/xtls/xray-core/features/dns"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/features/dns"
 )
 
 func TestLocalNameServer(t *testing.T) {
 	s := NewLocalNameServer()
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP{}, dns.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-		FakeEnable: false,
+	}, CacheStrategy_Cache_ALL)
-	})
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {

app/dns/nameserver_quic.go

@@ -0,0 +1,394 @@
+package dns
+
+import (
+	"context"
+	"net/url"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/lucas-clemente/quic-go"
+	"golang.org/x/net/dns/dnsmessage"
+	"golang.org/x/net/http2"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/log"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/protocol/dns"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/signal/pubsub"
+	"github.com/xtls/xray-core/common/task"
+	dns_feature "github.com/xtls/xray-core/features/dns"
+	"github.com/xtls/xray-core/transport/internet/tls"
+)
+
+// NextProtoDQ - During connection establishment, DNS/QUIC support is indicated
+// by selecting the ALPN token "dq" in the crypto handshake.
+const NextProtoDQ = "doq-i00"
+
+// QUICNameServer implemented DNS over QUIC
+type QUICNameServer struct {
+	sync.RWMutex
+	ips         map[string]record
+	pub         *pubsub.Service
+	cleanup     *task.Periodic
+	reqID       uint32
+	name        string
+	destination net.Destination
+	session     quic.Session
+}
+
+// NewQUICNameServer creates DNS-over-QUIC client object for local resolving
+func NewQUICNameServer(url *url.URL) (*QUICNameServer, error) {
+	newError("DNS: created Local DNS-over-QUIC client for ", url.String()).AtInfo().WriteToLog()
+
+	var err error
+	port := net.Port(784)
+	if url.Port() != "" {
+		port, err = net.PortFromString(url.Port())
+		if err != nil {
+			return nil, err
+		}
+	}
+	dest := net.UDPDestination(net.DomainAddress(url.Hostname()), port)
+
+	s := &QUICNameServer{
+		ips:         make(map[string]record),
+		pub:         pubsub.NewService(),
+		name:        url.String(),
+		destination: dest,
+	}
+	s.cleanup = &task.Periodic{
+		Interval: time.Minute,
+		Execute:  s.Cleanup,
+	}
+
+	return s, nil
+}
+
+// Name returns client name
+func (s *QUICNameServer) Name() string {
+	return s.name
+}
+
+// Cleanup clears expired items from cache
+func (s *QUICNameServer) Cleanup() error {
+	now := time.Now()
+	s.Lock()
+	defer s.Unlock()
+
+	if len(s.ips) == 0 {
+		return newError("nothing to do. stopping...")
+	}
+
+	for domain, record := range s.ips {
+		if record.A != nil && record.A.Expire.Before(now) {
+			record.A = nil
+		}
+		if record.AAAA != nil && record.AAAA.Expire.Before(now) {
+			record.AAAA = nil
+		}
+
+		if record.A == nil && record.AAAA == nil {
+			newError(s.name, " cleanup ", domain).AtDebug().WriteToLog()
+			delete(s.ips, domain)
+		} else {
+			s.ips[domain] = record
+		}
+	}
+
+	if len(s.ips) == 0 {
+		s.ips = make(map[string]record)
+	}
+
+	return nil
+}
+
+func (s *QUICNameServer) updateIP(req *dnsRequest, ipRec *IPRecord) {
+	elapsed := time.Since(req.start)
+
+	s.Lock()
+	rec := s.ips[req.domain]
+	updated := false
+
+	switch req.reqType {
+	case dnsmessage.TypeA:
+		if isNewer(rec.A, ipRec) {
+			rec.A = ipRec
+			updated = true
+		}
+	case dnsmessage.TypeAAAA:
+		addr := make([]net.Address, 0)
+		for _, ip := range ipRec.IP {
+			if len(ip.IP()) == net.IPv6len {
+				addr = append(addr, ip)
+			}
+		}
+		ipRec.IP = addr
+		if isNewer(rec.AAAA, ipRec) {
+			rec.AAAA = ipRec
+			updated = true
+		}
+	}
+	newError(s.name, " got answer: ", req.domain, " ", req.reqType, " -> ", ipRec.IP, " ", elapsed).AtInfo().WriteToLog()
+
+	if updated {
+		s.ips[req.domain] = rec
+	}
+	switch req.reqType {
+	case dnsmessage.TypeA:
+		s.pub.Publish(req.domain+"4", nil)
+	case dnsmessage.TypeAAAA:
+		s.pub.Publish(req.domain+"6", nil)
+	}
+	s.Unlock()
+	common.Must(s.cleanup.Start())
+}
+
+func (s *QUICNameServer) newReqID() uint16 {
+	return uint16(atomic.AddUint32(&s.reqID, 1))
+}
+
+func (s *QUICNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
+	newError(s.name, " querying: ", domain).AtInfo().WriteToLog(session.ExportIDToError(ctx))
+
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
+
+	var deadline time.Time
+	if d, ok := ctx.Deadline(); ok {
+		deadline = d
+	} else {
+		deadline = time.Now().Add(time.Second * 5)
+	}
+
+	for _, req := range reqs {
+		go func(r *dnsRequest) {
+			// generate new context for each req, using same context
+			// may cause reqs all aborted if any one encounter an error
+			dnsCtx := context.Background()
+
+			// reserve internal dns server requested Inbound
+			if inbound := session.InboundFromContext(ctx); inbound != nil {
+				dnsCtx = session.ContextWithInbound(dnsCtx, inbound)
+			}
+			dnsCtx = session.ContextWithContent(dnsCtx, &session.Content{
+				Protocol:       "quic",
+				SkipDNSResolve: true,
+			})
+			dnsCtx = log.ContextWithAccessMessage(dnsCtx, &log.AccessMessage{
+				From:   "DoQ",
+				To:     s.name,
+				Status: log.AccessAccepted,
+				Reason: "",
+			})
+
+			var cancel context.CancelFunc
+			dnsCtx, cancel = context.WithDeadline(dnsCtx, deadline)
+			defer cancel()
+
+			b, err := dns.PackMessage(r.msg)
+			if err != nil {
+				newError("failed to pack dns query").Base(err).AtError().WriteToLog()
+				return
+			}
+
+			conn, err := s.openStream(dnsCtx)
+			if err != nil {
+				newError("failed to open quic session").Base(err).AtError().WriteToLog()
+				return
+			}
+
+			_, err = conn.Write(b.Bytes())
+			if err != nil {
+				newError("failed to send query").Base(err).AtError().WriteToLog()
+				return
+			}
+
+			_ = conn.Close()
+
+			respBuf := buf.New()
+			defer respBuf.Release()
+			n, err := respBuf.ReadFrom(conn)
+			if err != nil && n == 0 {
+				newError("failed to read response").Base(err).AtError().WriteToLog()
+				return
+			}
+
+			rec, err := parseResponse(respBuf.Bytes())
+			if err != nil {
+				newError("failed to handle response").Base(err).AtError().WriteToLog()
+				return
+			}
+			s.updateIP(r, rec)
+		}(req)
+	}
+}
+
+func (s *QUICNameServer) findIPsForDomain(domain string, option dns_feature.IPOption) ([]net.IP, error) {
+	s.RLock()
+	record, found := s.ips[domain]
+	s.RUnlock()
+
+	if !found {
+		return nil, errRecordNotFound
+	}
+
+	var ips []net.Address
+	var lastErr error
+	if option.IPv6Enable && record.AAAA != nil && record.AAAA.RCode == dnsmessage.RCodeSuccess {
+		aaaa, err := record.AAAA.getIPs()
+		if err != nil {
+			lastErr = err
+		}
+		ips = append(ips, aaaa...)
+	}
+
+	if option.IPv4Enable && record.A != nil && record.A.RCode == dnsmessage.RCodeSuccess {
+		a, err := record.A.getIPs()
+		if err != nil {
+			lastErr = err
+		}
+		ips = append(ips, a...)
+	}
+
+	if len(ips) > 0 {
+		return toNetIP(ips)
+	}
+
+	if lastErr != nil {
+		return nil, lastErr
+	}
+
+	if (option.IPv4Enable && record.A != nil) || (option.IPv6Enable && record.AAAA != nil) {
+		return nil, dns_feature.ErrEmptyResponse
+	}
+
+	return nil, errRecordNotFound
+}
+
+// QueryIP is called from dns.Server->queryIPTimeout
+func (s *QUICNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, cs CacheStrategy) ([]net.IP, error) {
+	fqdn := Fqdn(domain)
+
+	if cs == CacheStrategy_Cache_DISABLE {
+		newError("DNS cache is disabled. Querying IP for ", domain, " at ", s.name).AtDebug().WriteToLog()
+	} else {
+		ips, err := s.findIPsForDomain(fqdn, option)
+		if err != errRecordNotFound {
+			if cs == CacheStrategy_Cache_NOERROR && err == nil {
+				newError(s.name, " cache HIT ", domain, " -> ", ips).Base(err).AtDebug().WriteToLog()
+				log.Record(&log.DNSLog{s.name, domain, ips, log.DNSCacheHit, 0, err})
+				return ips, err
+			}
+		}
+	}
+
+	// ipv4 and ipv6 belong to different subscription groups
+	var sub4, sub6 *pubsub.Subscriber
+	if option.IPv4Enable {
+		sub4 = s.pub.Subscribe(fqdn + "4")
+		defer sub4.Close()
+	}
+	if option.IPv6Enable {
+		sub6 = s.pub.Subscribe(fqdn + "6")
+		defer sub6.Close()
+	}
+	done := make(chan interface{})
+	go func() {
+		if sub4 != nil {
+			select {
+			case <-sub4.Wait():
+			case <-ctx.Done():
+			}
+		}
+		if sub6 != nil {
+			select {
+			case <-sub6.Wait():
+			case <-ctx.Done():
+			}
+		}
+		close(done)
+	}()
+	s.sendQuery(ctx, fqdn, clientIP, option)
+	start := time.Now()
+
+	for {
+		ips, err := s.findIPsForDomain(fqdn, option)
+		if err != errRecordNotFound {
+			log.Record(&log.DNSLog{s.name, domain, ips, log.DNSQueried, time.Since(start), err})
+			return ips, err
+		}
+
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		case <-done:
+		}
+	}
+}
+
+func isActive(s quic.Session) bool {
+	select {
+	case <-s.Context().Done():
+		return false
+	default:
+		return true
+	}
+}
+
+func (s *QUICNameServer) getSession() (quic.Session, error) {
+	var session quic.Session
+	s.RLock()
+	session = s.session
+	if session != nil && isActive(session) {
+		s.RUnlock()
+		return session, nil
+	}
+	if session != nil {
+		// we're recreating the session, let's create a new one
+		_ = session.CloseWithError(0, "")
+	}
+	s.RUnlock()
+
+	s.Lock()
+	defer s.Unlock()
+
+	var err error
+	session, err = s.openSession()
+	if err != nil {
+		// This does not look too nice, but QUIC (or maybe quic-go)
+		// doesn't seem stable enough.
+		// Maybe retransmissions aren't fully implemented in quic-go?
+		// Anyways, the simple solution is to make a second try when
+		// it fails to open the QUIC session.
+		session, err = s.openSession()
+		if err != nil {
+			return nil, err
+		}
+	}
+	s.session = session
+	return session, nil
+}
+
+func (s *QUICNameServer) openSession() (quic.Session, error) {
+	tlsConfig := tls.Config{}
+	quicConfig := &quic.Config{}
+
+	session, err := quic.DialAddrContext(context.Background(), s.destination.NetAddr(), tlsConfig.GetTLSConfig(tls.WithNextProto("http/1.1", http2.NextProtoTLS, NextProtoDQ)), quicConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	return session, nil
+}
+
+func (s *QUICNameServer) openStream(ctx context.Context) (quic.Stream, error) {
+	session, err := s.getSession()
+	if err != nil {
+		return nil, err
+	}
+
+	// open a new stream
+	return session.OpenStreamSync(ctx)
+}

app/dns/nameserver_quic_test.go

@@ -0,0 +1,60 @@
+package dns_test
+
+import (
+	"context"
+	"net/url"
+	"testing"
+	"time"
+
+	"github.com/google/go-cmp/cmp"
+
+	. "github.com/xtls/xray-core/app/dns"
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
+	dns_feature "github.com/xtls/xray-core/features/dns"
+)
+
+func TestQUICNameServer(t *testing.T) {
+	url, err := url.Parse("quic://dns.adguard.com")
+	common.Must(err)
+	s, err := NewQUICNameServer(url)
+	common.Must(err)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+	}, CacheStrategy_Cache_ALL)
+	cancel()
+	common.Must(err)
+	if len(ips) == 0 {
+		t.Error("expect some ips, but got 0")
+	}
+}
+
+func TestQUICNameServerWithCache(t *testing.T) {
+	url, err := url.Parse("quic://dns.adguard.com")
+	common.Must(err)
+	s, err := NewQUICNameServer(url)
+	common.Must(err)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+	}, CacheStrategy_Cache_ALL)
+	cancel()
+	common.Must(err)
+	if len(ips) == 0 {
+		t.Error("expect some ips, but got 0")
+	}
+
+	ctx2, cancel := context.WithTimeout(context.Background(), time.Second*5)
+	ips2, err := s.QueryIP(ctx2, "google.com", net.IP(nil), dns_feature.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+	}, CacheStrategy_Cache_ALL)
+	cancel()
+	common.Must(err)
+	if r := cmp.Diff(ips2, ips); r != "" {
+		t.Fatal(r)
+	}
+}

app/dns/nameserver_udp.go

@@ -31,10 +31,10 @@ type ClassicNameServer struct {
 	udpServer *udp.Dispatcher
 	cleanup   *task.Periodic
 	reqID     uint32
-	clientIP  net.IP
 }
 
-func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher, clientIP net.IP) *ClassicNameServer {
+// NewClassicNameServer creates udp server object for remote resolving.
+func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher) *ClassicNameServer {
 	// default to 53 if unspecific
 	if address.Port == 0 {
 		address.Port = net.Port(53)
@@ -44,7 +44,6 @@ func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher
 		address:  address,
 		ips:      make(map[string]record),
 		requests: make(map[uint16]dnsRequest),
-		clientIP: clientIP,
 		pub:      pubsub.NewService(),
 		name:     strings.ToUpper(address.String()),
 	}
@@ -57,10 +56,12 @@ func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher
 	return s
 }
 
+// Name implements Server.
 func (s *ClassicNameServer) Name() string {
 	return s.name
 }
 
+// Cleanup clears expired items from cache
 func (s *ClassicNameServer) Cleanup() error {
 	now := time.Now()
 	s.Lock()
@@ -102,6 +103,7 @@ func (s *ClassicNameServer) Cleanup() error {
 	return nil
 }
 
+// HandleResponse handles udp response packet from remote DNS server.
 func (s *ClassicNameServer) HandleResponse(ctx context.Context, packet *udp_proto.Packet) {
 	ipRec, err := parseResponse(packet.Payload.Bytes())
 	if err != nil {
@@ -179,10 +181,10 @@ func (s *ClassicNameServer) addPendingRequest(req *dnsRequest) {
 	s.requests[id] = *req
 }
 
-func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, option dns_feature.IPOption) {
+func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
 	newError(s.name, " querying DNS for: ", domain).AtDebug().WriteToLog(session.ExportIDToError(ctx))
 
-	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP))
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
 
 	for _, req := range reqs {
 		s.addPendingRequest(req)
@@ -191,7 +193,6 @@ func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, option
 		if inbound := session.InboundFromContext(ctx); inbound != nil {
 			udpCtx = session.ContextWithInbound(udpCtx, inbound)
 		}
-
 		udpCtx = session.ContextWithContent(udpCtx, &session.Content{
 			Protocol: "dns",
 		})
@@ -233,7 +234,7 @@ func (s *ClassicNameServer) findIPsForDomain(domain string, option dns_feature.I
 	}
 
 	if len(ips) > 0 {
-		return toNetIP(ips), nil
+		return toNetIP(ips)
 	}
 
 	if lastErr != nil {
@@ -244,15 +245,21 @@ func (s *ClassicNameServer) findIPsForDomain(domain string, option dns_feature.I
 }
 
 // QueryIP implements Server.
-func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, error) {
+func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, cs CacheStrategy) ([]net.IP, error) {
 	fqdn := Fqdn(domain)
 
+	if cs == CacheStrategy_Cache_DISABLE {
+		newError("DNS cache is disabled. Querying IP for ", domain, " at ", s.name).AtDebug().WriteToLog()
+	} else {
 		ips, err := s.findIPsForDomain(fqdn, option)
 		if err != errRecordNotFound {
+			if cs == CacheStrategy_Cache_NOERROR && err == nil {
 				newError(s.name, " cache HIT ", domain, " -> ", ips).Base(err).AtDebug().WriteToLog()
 				log.Record(&log.DNSLog{s.name, domain, ips, log.DNSCacheHit, 0, err})
 				return ips, err
 			}
+		}
+	}
 
 	// ipv4 and ipv6 belong to different subscription groups
 	var sub4, sub6 *pubsub.Subscriber
@@ -280,7 +287,7 @@ func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, option d
 		}
 		close(done)
 	}()
-	s.sendQuery(ctx, fqdn, option)
+	s.sendQuery(ctx, fqdn, clientIP, option)
 	start := time.Now()
 
 	for {

app/dns/options.go

@@ -0,0 +1,16 @@
+package dns
+
+import "github.com/xtls/xray-core/features/dns"
+
+func isIPQuery(o *dns.IPOption) bool {
+	return o.IPv4Enable || o.IPv6Enable
+}
+
+func canQueryOnClient(o *dns.IPOption, c *Client) bool {
+	isIPClient := !(c.Name() == FakeDNSName)
+	return isIPClient && isIPQuery(o)
+}
+
+func isQuery(o *dns.IPOption) bool {
+	return !(o.IPv4Enable || o.IPv6Enable || o.FakeEnable)
+}

app/dns/server.go

@@ -1,437 +0,0 @@
-package dns
-
-//go:generate go run github.com/xtls/xray-core/common/errors/errorgen
-
-import (
-	"context"
-	"fmt"
-	"log"
-	"net/url"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/xtls/xray-core/app/router"
-	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/errors"
-	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/common/session"
-	"github.com/xtls/xray-core/common/strmatcher"
-	"github.com/xtls/xray-core/common/uuid"
-	core "github.com/xtls/xray-core/core"
-	"github.com/xtls/xray-core/features"
-	"github.com/xtls/xray-core/features/dns"
-	"github.com/xtls/xray-core/features/routing"
-)
-
-// Server is a DNS rely server.
-type Server struct {
-	sync.Mutex
-	hosts         *StaticHosts
-	clientIP      net.IP
-	clients       []Client // clientIdx -> Client
-	ctx           context.Context
-	ipIndexMap    []*MultiGeoIPMatcher // clientIdx -> *MultiGeoIPMatcher
-	domainRules   [][]string           // clientIdx -> domainRuleIdx -> DomainRule
-	domainMatcher strmatcher.IndexMatcher
-	matcherInfos  []DomainMatcherInfo // matcherIdx -> DomainMatcherInfo
-	tag           string
-}
-
-// DomainMatcherInfo contains information attached to index returned by Server.domainMatcher
-type DomainMatcherInfo struct {
-	clientIdx     uint16
-	domainRuleIdx uint16
-}
-
-// MultiGeoIPMatcher for match
-type MultiGeoIPMatcher struct {
-	matchers []*router.GeoIPMatcher
-}
-
-var errExpectedIPNonMatch = errors.New("expectIPs not match")
-
-// Match check ip match
-func (c *MultiGeoIPMatcher) Match(ip net.IP) bool {
-	for _, matcher := range c.matchers {
-		if matcher.Match(ip) {
-			return true
-		}
-	}
-	return false
-}
-
-// HasMatcher check has matcher
-func (c *MultiGeoIPMatcher) HasMatcher() bool {
-	return len(c.matchers) > 0
-}
-
-func generateRandomTag() string {
-	id := uuid.New()
-	return "xray.system." + id.String()
-}
-
-// New creates a new DNS server with given configuration.
-func New(ctx context.Context, config *Config) (*Server, error) {
-	server := &Server{
-		clients: make([]Client, 0, len(config.NameServers)+len(config.NameServer)),
-		ctx:     ctx,
-		tag:     config.Tag,
-	}
-	if server.tag == "" {
-		server.tag = generateRandomTag()
-	}
-	if len(config.ClientIp) > 0 {
-		if len(config.ClientIp) != net.IPv4len && len(config.ClientIp) != net.IPv6len {
-			return nil, newError("unexpected IP length", len(config.ClientIp))
-		}
-		server.clientIP = net.IP(config.ClientIp)
-	}
-
-	hosts, err := NewStaticHosts(config.StaticHosts, config.Hosts)
-	if err != nil {
-		return nil, newError("failed to create hosts").Base(err)
-	}
-	server.hosts = hosts
-
-	addNameServer := func(ns *NameServer) int {
-		endpoint := ns.Address
-		address := endpoint.Address.AsAddress()
-
-		switch {
-		case address.Family().IsDomain() && address.Domain() == "localhost":
-			server.clients = append(server.clients, NewLocalNameServer())
-			// Priotize local domains with specific TLDs or without any dot to local DNS
-			// References:
-			// https://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.xhtml
-			// https://unix.stackexchange.com/questions/92441/whats-the-difference-between-local-home-and-lan
-			localTLDsAndDotlessDomains := []*NameServer_PriorityDomain{
-				{Type: DomainMatchingType_Regex, Domain: "^[^.]+$"}, // This will only match domains without any dot
-				{Type: DomainMatchingType_Subdomain, Domain: "local"},
-				{Type: DomainMatchingType_Subdomain, Domain: "localdomain"},
-				{Type: DomainMatchingType_Subdomain, Domain: "localhost"},
-				{Type: DomainMatchingType_Subdomain, Domain: "lan"},
-				{Type: DomainMatchingType_Subdomain, Domain: "home.arpa"},
-				{Type: DomainMatchingType_Subdomain, Domain: "example"},
-				{Type: DomainMatchingType_Subdomain, Domain: "invalid"},
-				{Type: DomainMatchingType_Subdomain, Domain: "test"},
-			}
-			ns.PrioritizedDomain = append(ns.PrioritizedDomain, localTLDsAndDotlessDomains...)
-
-		case address.Family().IsDomain() && strings.HasPrefix(address.Domain(), "https+local://"):
-			// URI schemed string treated as domain
-			// DOH Local mode
-			u, err := url.Parse(address.Domain())
-			if err != nil {
-				log.Fatalln(newError("DNS config error").Base(err))
-			}
-			server.clients = append(server.clients, NewDoHLocalNameServer(u, server.clientIP))
-
-		case address.Family().IsDomain() && strings.HasPrefix(address.Domain(), "https://"):
-			// DOH Remote mode
-			u, err := url.Parse(address.Domain())
-			if err != nil {
-				log.Fatalln(newError("DNS config error").Base(err))
-			}
-			idx := len(server.clients)
-			server.clients = append(server.clients, nil)
-
-			// need the core dispatcher, register DOHClient at callback
-			common.Must(core.RequireFeatures(ctx, func(d routing.Dispatcher) {
-				c, err := NewDoHNameServer(u, d, server.clientIP)
-				if err != nil {
-					log.Fatalln(newError("DNS config error").Base(err))
-				}
-				server.clients[idx] = c
-			}))
-
-		case address.Family().IsDomain() && address.Domain() == "fakedns":
-			server.clients = append(server.clients, NewFakeDNSServer())
-
-		default:
-			// UDP classic DNS mode
-			dest := endpoint.AsDestination()
-			if dest.Network == net.Network_Unknown {
-				dest.Network = net.Network_UDP
-			}
-			if dest.Network == net.Network_UDP {
-				idx := len(server.clients)
-				server.clients = append(server.clients, nil)
-
-				common.Must(core.RequireFeatures(ctx, func(d routing.Dispatcher) {
-					server.clients[idx] = NewClassicNameServer(dest, d, server.clientIP)
-				}))
-			}
-		}
-		server.ipIndexMap = append(server.ipIndexMap, nil)
-		return len(server.clients) - 1
-	}
-
-	if len(config.NameServers) > 0 {
-		features.PrintDeprecatedFeatureWarning("simple DNS server")
-		for _, destPB := range config.NameServers {
-			addNameServer(&NameServer{Address: destPB})
-		}
-	}
-
-	if len(config.NameServer) > 0 {
-		clientIndices := []int{}
-		domainRuleCount := 0
-		for _, ns := range config.NameServer {
-			idx := addNameServer(ns)
-			clientIndices = append(clientIndices, idx)
-			domainRuleCount += len(ns.PrioritizedDomain)
-		}
-
-		domainRules := make([][]string, len(server.clients))
-		domainMatcher := &strmatcher.MatcherGroup{}
-		matcherInfos := make([]DomainMatcherInfo, domainRuleCount+1) // matcher index starts from 1
-		var geoIPMatcherContainer router.GeoIPMatcherContainer
-		for nidx, ns := range config.NameServer {
-			idx := clientIndices[nidx]
-
-			// Establish domain rule matcher
-			rules := []string{}
-			ruleCurr := 0
-			ruleIter := 0
-			for _, domain := range ns.PrioritizedDomain {
-				matcher, err := toStrMatcher(domain.Type, domain.Domain)
-				if err != nil {
-					return nil, newError("failed to create prioritized domain").Base(err).AtWarning()
-				}
-				midx := domainMatcher.Add(matcher)
-				if midx >= uint32(len(matcherInfos)) { // This rarely happens according to current matcher's implementation
-					newError("expanding domain matcher info array to size ", midx, " when adding ", matcher).AtDebug().WriteToLog()
-					matcherInfos = append(matcherInfos, make([]DomainMatcherInfo, midx-uint32(len(matcherInfos))+1)...)
-				}
-				info := &matcherInfos[midx]
-				info.clientIdx = uint16(idx)
-				if ruleCurr < len(ns.OriginalRules) {
-					info.domainRuleIdx = uint16(ruleCurr)
-					rule := ns.OriginalRules[ruleCurr]
-					if ruleCurr >= len(rules) {
-						rules = append(rules, rule.Rule)
-					}
-					ruleIter++
-					if ruleIter >= int(rule.Size) {
-						ruleIter = 0
-						ruleCurr++
-					}
-				} else { // No original rule, generate one according to current domain matcher (majorly for compatibility with tests)
-					info.domainRuleIdx = uint16(len(rules))
-					rules = append(rules, matcher.String())
-				}
-			}
-			domainRules[idx] = rules
-
-			// only add to ipIndexMap if GeoIP is configured
-			if len(ns.Geoip) > 0 {
-				var matchers []*router.GeoIPMatcher
-				for _, geoip := range ns.Geoip {
-					matcher, err := geoIPMatcherContainer.Add(geoip)
-					if err != nil {
-						return nil, newError("failed to create ip matcher").Base(err).AtWarning()
-					}
-					matchers = append(matchers, matcher)
-				}
-				matcher := &MultiGeoIPMatcher{matchers: matchers}
-				server.ipIndexMap[idx] = matcher
-			}
-		}
-		server.domainRules = domainRules
-		server.domainMatcher = domainMatcher
-		server.matcherInfos = matcherInfos
-	}
-
-	if len(server.clients) == 0 {
-		server.clients = append(server.clients, NewLocalNameServer())
-		server.ipIndexMap = append(server.ipIndexMap, nil)
-	}
-
-	return server, nil
-}
-
-// Type implements common.HasType.
-func (*Server) Type() interface{} {
-	return dns.ClientType()
-}
-
-// Start implements common.Runnable.
-func (s *Server) Start() error {
-	return nil
-}
-
-// Close implements common.Closable.
-func (s *Server) Close() error {
-	return nil
-}
-
-func (s *Server) IsOwnLink(ctx context.Context) bool {
-	inbound := session.InboundFromContext(ctx)
-	return inbound != nil && inbound.Tag == s.tag
-}
-
-// Match check dns ip match geoip
-func (s *Server) Match(idx int, client Client, domain string, ips []net.IP) ([]net.IP, error) {
-	var matcher *MultiGeoIPMatcher
-	if idx < len(s.ipIndexMap) {
-		matcher = s.ipIndexMap[idx]
-	}
-	if matcher == nil {
-		return ips, nil
-	}
-
-	if !matcher.HasMatcher() {
-		newError("domain ", domain, " server has no valid matcher: ", client.Name(), " idx:", idx).AtDebug().WriteToLog()
-		return ips, nil
-	}
-
-	newIps := []net.IP{}
-	for _, ip := range ips {
-		if matcher.Match(ip) {
-			newIps = append(newIps, ip)
-		}
-	}
-	if len(newIps) == 0 {
-		return nil, errExpectedIPNonMatch
-	}
-	newError("domain ", domain, " expectIPs ", newIps, " matched at server ", client.Name(), " idx:", idx).AtDebug().WriteToLog()
-	return newIps, nil
-}
-
-func (s *Server) queryIPTimeout(idx int, client Client, domain string, option dns.IPOption) ([]net.IP, error) {
-	ctx, cancel := context.WithTimeout(s.ctx, time.Second*4)
-	if len(s.tag) > 0 {
-		ctx = session.ContextWithInbound(ctx, &session.Inbound{
-			Tag: s.tag,
-		})
-	}
-
-	ips, err := client.QueryIP(ctx, domain, option)
-	cancel()
-
-	if err != nil {
-		return ips, err
-	}
-
-	ips, err = s.Match(idx, client, domain, ips)
-	return ips, err
-}
-
-func (s *Server) lookupStatic(domain string, option dns.IPOption, depth int32) []net.Address {
-	ips := s.hosts.LookupIP(domain, option)
-	if ips == nil {
-		return nil
-	}
-	if ips[0].Family().IsDomain() && depth < 5 {
-		if newIPs := s.lookupStatic(ips[0].Domain(), option, depth+1); newIPs != nil {
-			return newIPs
-		}
-	}
-	return ips
-}
-
-func toNetIP(ips []net.Address) []net.IP {
-	if len(ips) == 0 {
-		return nil
-	}
-	netips := make([]net.IP, 0, len(ips))
-	for _, ip := range ips {
-		netips = append(netips, ip.IP())
-	}
-	return netips
-}
-
-// LookupIP implements dns.Client.
-func (s *Server) LookupIP(domain string, option dns.IPOption) ([]net.IP, error) {
-	if domain == "" {
-		return nil, newError("empty domain name")
-	}
-
-	// normalize the FQDN form query
-	if strings.HasSuffix(domain, ".") {
-		domain = domain[:len(domain)-1]
-	}
-
-	ips := s.lookupStatic(domain, option, 0)
-	if ips != nil && ips[0].Family().IsIP() {
-		newError("returning ", len(ips), " IPs for domain ", domain).WriteToLog()
-		return toNetIP(ips), nil
-	}
-
-	if ips != nil && ips[0].Family().IsDomain() {
-		newdomain := ips[0].Domain()
-		newError("domain replaced: ", domain, " -> ", newdomain).WriteToLog()
-		domain = newdomain
-	}
-
-	var lastErr error
-	var matchedClient Client
-	if s.domainMatcher != nil {
-		indices := s.domainMatcher.Match(domain)
-		domainRules := []string{}
-		matchingDNS := []string{}
-		for _, idx := range indices {
-			info := s.matcherInfos[idx]
-			rule := s.domainRules[info.clientIdx][info.domainRuleIdx]
-			domainRules = append(domainRules, fmt.Sprintf("%s(DNS idx:%d)", rule, info.clientIdx))
-			matchingDNS = append(matchingDNS, s.clients[info.clientIdx].Name())
-		}
-		if len(domainRules) > 0 {
-			newError("domain ", domain, " matches following rules: ", domainRules).AtDebug().WriteToLog()
-		}
-		if len(matchingDNS) > 0 {
-			newError("domain ", domain, " uses following DNS first: ", matchingDNS).AtDebug().WriteToLog()
-		}
-		for _, idx := range indices {
-			clientIdx := int(s.matcherInfos[idx].clientIdx)
-			matchedClient = s.clients[clientIdx]
-			if !option.FakeEnable && strings.EqualFold(matchedClient.Name(), "FakeDNS") {
-				newError("skip DNS resolution for domain ", domain, " at server ", matchedClient.Name()).AtDebug().WriteToLog()
-				continue
-			}
-			ips, err := s.queryIPTimeout(clientIdx, matchedClient, domain, option)
-			if len(ips) > 0 {
-				return ips, nil
-			}
-			if err == dns.ErrEmptyResponse {
-				return nil, err
-			}
-			if err != nil {
-				newError("failed to lookup ip for domain ", domain, " at server ", matchedClient.Name()).Base(err).WriteToLog()
-				lastErr = err
-			}
-		}
-	}
-
-	for idx, client := range s.clients {
-		if client == matchedClient {
-			newError("domain ", domain, " at server ", client.Name(), " idx:", idx, " already lookup failed, just ignore").AtDebug().WriteToLog()
-			continue
-		}
-		if !option.FakeEnable && strings.EqualFold(client.Name(), "FakeDNS") {
-			newError("skip DNS resolution for domain ", domain, " at server ", client.Name()).AtDebug().WriteToLog()
-			continue
-		}
-		ips, err := s.queryIPTimeout(idx, client, domain, option)
-		if len(ips) > 0 {
-			return ips, nil
-		}
-
-		if err != nil {
-			newError("failed to lookup ip for domain ", domain, " at server ", client.Name()).Base(err).WriteToLog()
-			lastErr = err
-		}
-		if err != context.Canceled && err != context.DeadlineExceeded && err != errExpectedIPNonMatch {
-			return nil, err
-		}
-	}
-
-	return nil, newError("returning nil for domain ", domain).Base(lastErr)
-}
-
-func init() {
-	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
-		return New(ctx, config.(*Config))
-	}))
-}

app/router/command/config.go

@@ -28,6 +28,12 @@ func (c routingContext) GetTargetPort() net.Port {
 	return net.Port(c.RoutingContext.GetTargetPort())
 }
 
+// GetSkipDNSResolve is a mock implementation here to match the interface,
+// SkipDNSResolve is set from dns module, no use if coming from a protobuf object?
+func (c routingContext) GetSkipDNSResolve() bool {
+	return false
+}
+
 // AsRoutingContext converts a protobuf RoutingContext into an implementation of routing.Context.
 func AsRoutingContext(r *RoutingContext) routing.Context {
 	return routingContext{r}

app/router/condition.go

@@ -66,24 +66,6 @@ type DomainMatcher struct {
 	matchers strmatcher.IndexMatcher
 }
 
-func NewMphMatcherGroup(domains []*Domain) (*DomainMatcher, error) {
-	g := strmatcher.NewMphMatcherGroup()
-	for _, d := range domains {
-		matcherType, f := matcherTypeMap[d.Type]
-		if !f {
-			return nil, newError("unsupported domain type", d.Type)
-		}
-		_, err := g.AddPattern(d.Value, matcherType)
-		if err != nil {
-			return nil, err
-		}
-	}
-	g.Build()
-	return &DomainMatcher{
-		matchers: g,
-	}, nil
-}
-
 func NewDomainMatcher(domains []*Domain) (*DomainMatcher, error) {
 	g := new(strmatcher.MatcherGroup)
 	for _, d := range domains {
@@ -100,7 +82,7 @@ func NewDomainMatcher(domains []*Domain) (*DomainMatcher, error) {
 }
 
 func (m *DomainMatcher) ApplyDomain(domain string) bool {
-	return len(m.matchers.Match(strings.ToLower(domain))) > 0
+	return len(m.matchers.Match(domain)) > 0
 }
 
 // Apply implements Condition.
@@ -109,7 +91,7 @@ func (m *DomainMatcher) Apply(ctx routing.Context) bool {
 	if len(domain) == 0 {
 		return false
 	}
-	return m.ApplyDomain(domain)
+	return m.ApplyDomain(strings.ToLower(domain))
 }
 
 type MultiGeoIPMatcher struct {

app/router/condition_test.go

@@ -359,9 +359,6 @@ func TestChinaSites(t *testing.T) {
 	matcher, err := NewDomainMatcher(domains)
 	common.Must(err)
 
-	acMatcher, err := NewMphMatcherGroup(domains)
-	common.Must(err)
-
 	type TestCase struct {
 		Domain string
 		Output bool
@@ -390,96 +387,9 @@ func TestChinaSites(t *testing.T) {
 	}
 
 	for _, testCase := range testCases {
-		r1 := matcher.ApplyDomain(testCase.Domain)
+		r := matcher.ApplyDomain(testCase.Domain)
-		r2 := acMatcher.ApplyDomain(testCase.Domain)
+		if r != testCase.Output {
-		if r1 != testCase.Output {
+			t.Error("expected output ", testCase.Output, " for domain ", testCase.Domain, " but got ", r)
-			t.Error("DomainMatcher expected output ", testCase.Output, " for domain ", testCase.Domain, " but got ", r1)
-		} else if r2 != testCase.Output {
-			t.Error("ACDomainMatcher expected output ", testCase.Output, " for domain ", testCase.Domain, " but got ", r2)
-		}
-	}
-}
-
-func BenchmarkMphDomainMatcher(b *testing.B) {
-	domains, err := loadGeoSite("CN")
-	common.Must(err)
-
-	matcher, err := NewMphMatcherGroup(domains)
-	common.Must(err)
-
-	type TestCase struct {
-		Domain string
-		Output bool
-	}
-	testCases := []TestCase{
-		{
-			Domain: "163.com",
-			Output: true,
-		},
-		{
-			Domain: "163.com",
-			Output: true,
-		},
-		{
-			Domain: "164.com",
-			Output: false,
-		},
-		{
-			Domain: "164.com",
-			Output: false,
-		},
-	}
-
-	for i := 0; i < 1024; i++ {
-		testCases = append(testCases, TestCase{Domain: strconv.Itoa(i) + ".not-exists.com", Output: false})
-	}
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		for _, testCase := range testCases {
-			_ = matcher.ApplyDomain(testCase.Domain)
-		}
-	}
-}
-
-func BenchmarkDomainMatcher(b *testing.B) {
-	domains, err := loadGeoSite("CN")
-	common.Must(err)
-
-	matcher, err := NewDomainMatcher(domains)
-	common.Must(err)
-
-	type TestCase struct {
-		Domain string
-		Output bool
-	}
-	testCases := []TestCase{
-		{
-			Domain: "163.com",
-			Output: true,
-		},
-		{
-			Domain: "163.com",
-			Output: true,
-		},
-		{
-			Domain: "164.com",
-			Output: false,
-		},
-		{
-			Domain: "164.com",
-			Output: false,
-		},
-	}
-
-	for i := 0; i < 1024; i++ {
-		testCases = append(testCases, TestCase{Domain: strconv.Itoa(i) + ".not-exists.com", Output: false})
-	}
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		for _, testCase := range testCases {
-			_ = matcher.ApplyDomain(testCase.Domain)
 		}
 	}
 }

app/router/config.go

@@ -67,24 +67,11 @@ func (rr *RoutingRule) BuildCondition() (Condition, error) {
 	conds := NewConditionChan()
 
 	if len(rr.Domain) > 0 {
-		switch rr.DomainMatcher {
-		case "linear":
 		matcher, err := NewDomainMatcher(rr.Domain)
 		if err != nil {
 			return nil, newError("failed to build domain condition").Base(err)
 		}
 		conds.Add(matcher)
-		case "mph", "hybrid":
-			fallthrough
-		default:
-			matcher, err := NewMphMatcherGroup(rr.Domain)
-			if err != nil {
-				return nil, newError("failed to build domain condition with MphDomainMatcher").Base(err)
-			}
-			newError("MphDomainMatcher is enabled for ", len(rr.Domain), " domain rule(s)").AtDebug().WriteToLog()
-			conds.Add(matcher)
-		}
-
 	}
 
 	if len(rr.UserEmail) > 0 {

app/router/config.pb.go

@@ -1,12 +1,13 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
+// 	protoc-gen-go v1.25.0
-// 	protoc        v3.15.8
+// 	protoc        v3.14.0
 // source: app/router/config.proto
 
 package router
 
 import (
+	proto "github.com/golang/protobuf/proto"
 	net "github.com/xtls/xray-core/common/net"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
@@ -21,6 +22,10 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
 // Type of domain value.
 type Domain_Type int32
 
@@ -510,7 +515,6 @@ type RoutingRule struct {
 	InboundTag     []string      `protobuf:"bytes,8,rep,name=inbound_tag,json=inboundTag,proto3" json:"inbound_tag,omitempty"`
 	Protocol       []string      `protobuf:"bytes,9,rep,name=protocol,proto3" json:"protocol,omitempty"`
 	Attributes     string        `protobuf:"bytes,15,opt,name=attributes,proto3" json:"attributes,omitempty"`
-	DomainMatcher  string        `protobuf:"bytes,17,opt,name=domain_matcher,json=domainMatcher,proto3" json:"domain_matcher,omitempty"`
 }
 
 func (x *RoutingRule) Reset() {
@@ -668,13 +672,6 @@ func (x *RoutingRule) GetAttributes() string {
 	return ""
 }
 
-func (x *RoutingRule) GetDomainMatcher() string {
-	if x != nil {
-		return x.DomainMatcher
-	}
-	return ""
-}
-
 type isRoutingRule_TargetTag interface {
 	isRoutingRule_TargetTag()
 }
@@ -949,7 +946,7 @@ var file_app_router_config_proto_rawDesc = []byte{
 	0x74, 0x12, 0x2e, 0x0a, 0x05, 0x65, 0x6e, 0x74, 0x72, 0x79, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b,
 	0x32, 0x18, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x72, 0x6f, 0x75, 0x74,
 	0x65, 0x72, 0x2e, 0x47, 0x65, 0x6f, 0x53, 0x69, 0x74, 0x65, 0x52, 0x05, 0x65, 0x6e, 0x74, 0x72,
-	0x79, 0x22, 0xb5, 0x06, 0x0a, 0x0b, 0x52, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x67, 0x52, 0x75, 0x6c,
+	0x79, 0x22, 0x8e, 0x06, 0x0a, 0x0b, 0x52, 0x6f, 0x75, 0x74, 0x69, 0x6e, 0x67, 0x52, 0x75, 0x6c,
 	0x65, 0x12, 0x12, 0x0a, 0x03, 0x74, 0x61, 0x67, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x48, 0x00,
 	0x52, 0x03, 0x74, 0x61, 0x67, 0x12, 0x25, 0x0a, 0x0d, 0x62, 0x61, 0x6c, 0x61, 0x6e, 0x63, 0x69,
 	0x6e, 0x67, 0x5f, 0x74, 0x61, 0x67, 0x18, 0x0c, 0x20, 0x01, 0x28, 0x09, 0x48, 0x00, 0x52, 0x0c,
@@ -997,38 +994,36 @@ var file_app_router_config_proto_rawDesc = []byte{
 	0x6f, 0x63, 0x6f, 0x6c, 0x18, 0x09, 0x20, 0x03, 0x28, 0x09, 0x52, 0x08, 0x70, 0x72, 0x6f, 0x74,
 	0x6f, 0x63, 0x6f, 0x6c, 0x12, 0x1e, 0x0a, 0x0a, 0x61, 0x74, 0x74, 0x72, 0x69, 0x62, 0x75, 0x74,
 	0x65, 0x73, 0x18, 0x0f, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0a, 0x61, 0x74, 0x74, 0x72, 0x69, 0x62,
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+	0x75, 0x74, 0x65, 0x73, 0x42, 0x0c, 0x0a, 0x0a, 0x74, 0x61, 0x72, 0x67, 0x65, 0x74, 0x5f, 0x74,
-	0x61, 0x74, 0x63, 0x68, 0x65, 0x72, 0x18, 0x11, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0d, 0x64, 0x6f,
+	0x61, 0x67, 0x22, 0x4e, 0x0a, 0x0d, 0x42, 0x61, 0x6c, 0x61, 0x6e, 0x63, 0x69, 0x6e, 0x67, 0x52,
-	0x6d, 0x61, 0x69, 0x6e, 0x4d, 0x61, 0x74, 0x63, 0x68, 0x65, 0x72, 0x42, 0x0c, 0x0a, 0x0a, 0x74,
+	0x75, 0x6c, 0x65, 0x12, 0x10, 0x0a, 0x03, 0x74, 0x61, 0x67, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09,
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-	0x5a, 0x24, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c,
+	0x02, 0x0f, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x52, 0x6f, 0x75, 0x74, 0x65,
-	0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f,
+	0x72, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
-	0x72, 0x6f, 0x75, 0x74, 0x65, 0x72, 0xaa, 0x02, 0x0f, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70,
-	0x70, 0x2e, 0x52, 0x6f, 0x75, 0x74, 0x65, 0x72, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

app/router/config.proto

@@ -119,8 +119,6 @@ message RoutingRule {
   repeated string protocol = 9;
 
   string attributes = 15;
-
-  string domain_matcher = 17;
 }
 
 message BalancingRule {

app/router/router.go

@@ -80,7 +80,13 @@ func (r *Router) PickRoute(ctx routing.Context) (routing.Route, error) {
 }
 
 func (r *Router) pickRouteInternal(ctx routing.Context) (*Rule, routing.Context, error) {
-	if r.domainStrategy == Config_IpOnDemand {
+
+	// SkipDNSResolve is set from DNS module.
+	// the DOH remote server maybe a domain name,
+	// this prevents cycle resolving dead loop
+	skipDNSResolve := ctx.GetSkipDNSResolve()
+
+	if r.domainStrategy == Config_IpOnDemand && !skipDNSResolve {
 		ctx = routing_dns.ContextWithDNSClient(ctx, r.dns)
 	}
 
@@ -90,7 +96,7 @@ func (r *Router) pickRouteInternal(ctx routing.Context) (*Rule, routing.Context,
 		}
 	}
 
-	if r.domainStrategy != Config_IpIfNonMatch || len(ctx.GetTargetDomain()) == 0 {
+	if r.domainStrategy != Config_IpIfNonMatch || len(ctx.GetTargetDomain()) == 0 || skipDNSResolve {
 		return nil, ctx, common.ErrNoClue
 	}
 

app/router/router_test.go

@@ -9,7 +9,6 @@ import (
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/session"
-	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/outbound"
 	routing_session "github.com/xtls/xray-core/features/routing/session"
 	"github.com/xtls/xray-core/testing/mocks"
@@ -116,11 +115,7 @@ func TestIPOnDemand(t *testing.T) {
 	defer mockCtl.Finish()
 
 	mockDNS := mocks.NewDNSClient(mockCtl)
-	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com"), dns.IPOption{
+	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com")).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
-		IPv4Enable: true,
-		IPv6Enable: true,
-		FakeEnable: false,
-	}).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
 
 	r := new(Router)
 	common.Must(r.Init(config, mockDNS, nil))
@@ -155,11 +150,7 @@ func TestIPIfNonMatchDomain(t *testing.T) {
 	defer mockCtl.Finish()
 
 	mockDNS := mocks.NewDNSClient(mockCtl)
-	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com"), dns.IPOption{
+	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com")).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
-		IPv4Enable: true,
-		IPv6Enable: true,
-		FakeEnable: false,
-	}).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
 
 	r := new(Router)
 	common.Must(r.Init(config, mockDNS, nil))

common/buf/buffer.go

@@ -24,17 +24,10 @@ type Buffer struct {
 	UDP   *net.Destination
 }
 
-// New creates a Buffer with 0 length and 8K capacity.
+// New creates a Buffer with 0 length and 2K capacity.
 func New() *Buffer {
-	buf := pool.Get().([]byte)
-	if cap(buf) >= Size {
-		buf = buf[:Size]
-	} else {
-		buf = make([]byte, Size)
-	}
-
 	return &Buffer{
-		v: buf,
+		v: pool.Get().([]byte),
 	}
 }
 
@@ -57,15 +50,8 @@ func NewExisted(b []byte) *Buffer {
 // StackNew creates a new Buffer object on stack.
 // This method is for buffers that is released in the same function.
 func StackNew() Buffer {
-	buf := pool.Get().([]byte)
-	if cap(buf) >= Size {
-		buf = buf[:Size]
-	} else {
-		buf = make([]byte, Size)
-	}
-
 	return Buffer{
-		v: buf,
+		v: pool.Get().([]byte),
 	}
 }
 
@@ -78,10 +64,7 @@ func (b *Buffer) Release() {
 	p := b.v
 	b.v = nil
 	b.Clear()
-
-	if cap(p) == Size {
 	pool.Put(p)
-	}
 	b.UDP = nil
 }
 

common/buf/readv_reader.go

@@ -4,6 +4,7 @@ package buf
 
 import (
 	"io"
+	"runtime"
 	"syscall"
 
 	"github.com/xtls/xray-core/common/platform"
@@ -133,13 +134,17 @@ func (r *ReadVReader) ReadMultiBuffer() (MultiBuffer, error) {
 	return mb, nil
 }
 
-var useReadv bool
+var useReadv = true
 
 func init() {
 	const defaultFlagValue = "NOT_DEFINED_AT_ALL"
 	value := platform.NewEnvFlag("xray.buf.readv").GetValue(func() string { return defaultFlagValue })
 	switch value {
-	case defaultFlagValue, "auto", "enable":
+	case defaultFlagValue, "auto":
+		if (runtime.GOARCH == "386" || runtime.GOARCH == "amd64" || runtime.GOARCH == "s390x") && (runtime.GOOS == "linux" || runtime.GOOS == "darwin" || runtime.GOOS == "windows") {
+			useReadv = true
+		}
+	case "enable":
 		useReadv = true
 	}
 }

common/protocol/tls/sniff.go

@@ -102,7 +102,7 @@ func ReadClientHello(data []byte, h *SniffHeader) error {
 					return errNotClientHello
 				}
 				if nameType == 0 {
-					serverName := string(d[:nameLen])
+					serverName := strings.ToLower(string(d[:nameLen]))
 					// An SNI value may not include a
 					// trailing dot. See
 					// https://tools.ietf.org/html/rfc6066#section-3.

common/session/session.go

@@ -75,7 +75,7 @@ type Content struct {
 
 	Attributes map[string]string
 
-	SkipRoutePick bool
+	SkipDNSResolve bool
 }
 
 // Sockopt is the settings for socket connection.

common/strmatcher/ac_automaton_matcher.go

@@ -1,243 +0,0 @@
-package strmatcher
-
-import (
-	"container/list"
-)
-
-const validCharCount = 53
-
-type MatchType struct {
-	matchType Type
-	exist     bool
-}
-
-const (
-	TrieEdge bool = true
-	FailEdge bool = false
-)
-
-type Edge struct {
-	edgeType bool
-	nextNode int
-}
-
-type ACAutomaton struct {
-	trie   [][validCharCount]Edge
-	fail   []int
-	exists []MatchType
-	count  int
-}
-
-func newNode() [validCharCount]Edge {
-	var s [validCharCount]Edge
-	for i := range s {
-		s[i] = Edge{
-			edgeType: FailEdge,
-			nextNode: 0,
-		}
-	}
-	return s
-}
-
-var char2Index = []int{
-	'A':  0,
-	'a':  0,
-	'B':  1,
-	'b':  1,
-	'C':  2,
-	'c':  2,
-	'D':  3,
-	'd':  3,
-	'E':  4,
-	'e':  4,
-	'F':  5,
-	'f':  5,
-	'G':  6,
-	'g':  6,
-	'H':  7,
-	'h':  7,
-	'I':  8,
-	'i':  8,
-	'J':  9,
-	'j':  9,
-	'K':  10,
-	'k':  10,
-	'L':  11,
-	'l':  11,
-	'M':  12,
-	'm':  12,
-	'N':  13,
-	'n':  13,
-	'O':  14,
-	'o':  14,
-	'P':  15,
-	'p':  15,
-	'Q':  16,
-	'q':  16,
-	'R':  17,
-	'r':  17,
-	'S':  18,
-	's':  18,
-	'T':  19,
-	't':  19,
-	'U':  20,
-	'u':  20,
-	'V':  21,
-	'v':  21,
-	'W':  22,
-	'w':  22,
-	'X':  23,
-	'x':  23,
-	'Y':  24,
-	'y':  24,
-	'Z':  25,
-	'z':  25,
-	'!':  26,
-	'$':  27,
-	'&':  28,
-	'\'': 29,
-	'(':  30,
-	')':  31,
-	'*':  32,
-	'+':  33,
-	',':  34,
-	';':  35,
-	'=':  36,
-	':':  37,
-	'%':  38,
-	'-':  39,
-	'.':  40,
-	'_':  41,
-	'~':  42,
-	'0':  43,
-	'1':  44,
-	'2':  45,
-	'3':  46,
-	'4':  47,
-	'5':  48,
-	'6':  49,
-	'7':  50,
-	'8':  51,
-	'9':  52,
-}
-
-func NewACAutomaton() *ACAutomaton {
-	var ac = new(ACAutomaton)
-	ac.trie = append(ac.trie, newNode())
-	ac.fail = append(ac.fail, 0)
-	ac.exists = append(ac.exists, MatchType{
-		matchType: Full,
-		exist:     false,
-	})
-	return ac
-}
-
-func (ac *ACAutomaton) Add(domain string, t Type) {
-	var node = 0
-	for i := len(domain) - 1; i >= 0; i-- {
-		var idx = char2Index[domain[i]]
-		if ac.trie[node][idx].nextNode == 0 {
-			ac.count++
-			if len(ac.trie) < ac.count+1 {
-				ac.trie = append(ac.trie, newNode())
-				ac.fail = append(ac.fail, 0)
-				ac.exists = append(ac.exists, MatchType{
-					matchType: Full,
-					exist:     false,
-				})
-			}
-			ac.trie[node][idx] = Edge{
-				edgeType: TrieEdge,
-				nextNode: ac.count,
-			}
-		}
-		node = ac.trie[node][idx].nextNode
-	}
-	ac.exists[node] = MatchType{
-		matchType: t,
-		exist:     true,
-	}
-	switch t {
-	case Domain:
-		ac.exists[node] = MatchType{
-			matchType: Full,
-			exist:     true,
-		}
-		var idx = char2Index['.']
-		if ac.trie[node][idx].nextNode == 0 {
-			ac.count++
-			if len(ac.trie) < ac.count+1 {
-				ac.trie = append(ac.trie, newNode())
-				ac.fail = append(ac.fail, 0)
-				ac.exists = append(ac.exists, MatchType{
-					matchType: Full,
-					exist:     false,
-				})
-			}
-			ac.trie[node][idx] = Edge{
-				edgeType: TrieEdge,
-				nextNode: ac.count,
-			}
-		}
-		node = ac.trie[node][idx].nextNode
-		ac.exists[node] = MatchType{
-			matchType: t,
-			exist:     true,
-		}
-	default:
-		break
-	}
-}
-
-func (ac *ACAutomaton) Build() {
-	var queue = list.New()
-	for i := 0; i < validCharCount; i++ {
-		if ac.trie[0][i].nextNode != 0 {
-			queue.PushBack(ac.trie[0][i])
-		}
-	}
-	for {
-		var front = queue.Front()
-		if front == nil {
-			break
-		} else {
-			var node = front.Value.(Edge).nextNode
-			queue.Remove(front)
-			for i := 0; i < validCharCount; i++ {
-				if ac.trie[node][i].nextNode != 0 {
-					ac.fail[ac.trie[node][i].nextNode] = ac.trie[ac.fail[node]][i].nextNode
-					queue.PushBack(ac.trie[node][i])
-				} else {
-					ac.trie[node][i] = Edge{
-						edgeType: FailEdge,
-						nextNode: ac.trie[ac.fail[node]][i].nextNode,
-					}
-				}
-			}
-		}
-	}
-}
-
-func (ac *ACAutomaton) Match(s string) bool {
-	var node = 0
-	var fullMatch = true
-	// 1. the match string is all through trie edge. FULL MATCH or DOMAIN
-	// 2. the match string is through a fail edge. NOT FULL MATCH
-	// 2.1 Through a fail edge, but there exists a valid node. SUBSTR
-	for i := len(s) - 1; i >= 0; i-- {
-		var idx = char2Index[s[i]]
-		fullMatch = fullMatch && ac.trie[node][idx].edgeType
-		node = ac.trie[node][idx].nextNode
-		switch ac.exists[node].matchType {
-		case Substr:
-			return true
-		case Domain:
-			if fullMatch {
-				return true
-			}
-		default:
-			break
-		}
-	}
-	return fullMatch && ac.exists[node].exist
-}

common/strmatcher/benchmark_test.go

@@ -8,19 +8,6 @@ import (
 	. "github.com/xtls/xray-core/common/strmatcher"
 )
 
-func BenchmarkACAutomaton(b *testing.B) {
-	ac := NewACAutomaton()
-	for i := 1; i <= 1024; i++ {
-		ac.Add(strconv.Itoa(i)+".v2ray.com", Domain)
-	}
-	ac.Build()
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		_ = ac.Match("0.v2ray.com")
-	}
-}
-
 func BenchmarkDomainMatcherGroup(b *testing.B) {
 	g := new(DomainMatcherGroup)
 

common/strmatcher/mph_matcher.go

@@ -1,301 +0,0 @@
-package strmatcher
-
-import (
-	"math/bits"
-	"regexp"
-	"sort"
-	"strings"
-	"unsafe"
-)
-
-// PrimeRK is the prime base used in Rabin-Karp algorithm.
-const PrimeRK = 16777619
-
-// calculate the rolling murmurHash of given string
-func RollingHash(s string) uint32 {
-	h := uint32(0)
-	for i := len(s) - 1; i >= 0; i-- {
-		h = h*PrimeRK + uint32(s[i])
-	}
-	return h
-}
-
-// A MphMatcherGroup is divided into three parts:
-// 1. `full` and `domain` patterns are matched by Rabin-Karp algorithm and minimal perfect hash table;
-// 2. `substr` patterns are matched by ac automaton;
-// 3. `regex` patterns are matched with the regex library.
-type MphMatcherGroup struct {
-	ac            *ACAutomaton
-	otherMatchers []matcherEntry
-	rules         []string
-	level0        []uint32
-	level0Mask    int
-	level1        []uint32
-	level1Mask    int
-	count         uint32
-	ruleMap       *map[string]uint32
-}
-
-func (g *MphMatcherGroup) AddFullOrDomainPattern(pattern string, t Type) {
-	h := RollingHash(pattern)
-	switch t {
-	case Domain:
-		(*g.ruleMap)["."+pattern] = h*PrimeRK + uint32('.')
-		fallthrough
-	case Full:
-		(*g.ruleMap)[pattern] = h
-	default:
-	}
-}
-
-func NewMphMatcherGroup() *MphMatcherGroup {
-	return &MphMatcherGroup{
-		ac:            nil,
-		otherMatchers: nil,
-		rules:         nil,
-		level0:        nil,
-		level0Mask:    0,
-		level1:        nil,
-		level1Mask:    0,
-		count:         1,
-		ruleMap:       &map[string]uint32{},
-	}
-}
-
-// AddPattern adds a pattern to MphMatcherGroup
-func (g *MphMatcherGroup) AddPattern(pattern string, t Type) (uint32, error) {
-	switch t {
-	case Substr:
-		if g.ac == nil {
-			g.ac = NewACAutomaton()
-		}
-		g.ac.Add(pattern, t)
-	case Full, Domain:
-		pattern = strings.ToLower(pattern)
-		g.AddFullOrDomainPattern(pattern, t)
-	case Regex:
-		r, err := regexp.Compile(pattern)
-		if err != nil {
-			return 0, err
-		}
-		g.otherMatchers = append(g.otherMatchers, matcherEntry{
-			m:  &regexMatcher{pattern: r},
-			id: g.count,
-		})
-	default:
-		panic("Unknown type")
-	}
-	return g.count, nil
-}
-
-// Build builds a minimal perfect hash table and ac automaton from insert rules
-func (g *MphMatcherGroup) Build() {
-	if g.ac != nil {
-		g.ac.Build()
-	}
-	keyLen := len(*g.ruleMap)
-	if keyLen == 0 {
-		keyLen = 1
-		(*g.ruleMap)["empty___"] = RollingHash("empty___")
-	}
-	g.level0 = make([]uint32, nextPow2(keyLen/4))
-	g.level0Mask = len(g.level0) - 1
-	g.level1 = make([]uint32, nextPow2(keyLen))
-	g.level1Mask = len(g.level1) - 1
-	var sparseBuckets = make([][]int, len(g.level0))
-	var ruleIdx int
-	for rule, hash := range *g.ruleMap {
-		n := int(hash) & g.level0Mask
-		g.rules = append(g.rules, rule)
-		sparseBuckets[n] = append(sparseBuckets[n], ruleIdx)
-		ruleIdx++
-	}
-	g.ruleMap = nil
-	var buckets []indexBucket
-	for n, vals := range sparseBuckets {
-		if len(vals) > 0 {
-			buckets = append(buckets, indexBucket{n, vals})
-		}
-	}
-	sort.Sort(bySize(buckets))
-
-	occ := make([]bool, len(g.level1))
-	var tmpOcc []int
-	for _, bucket := range buckets {
-		var seed = uint32(0)
-		for {
-			findSeed := true
-			tmpOcc = tmpOcc[:0]
-			for _, i := range bucket.vals {
-				n := int(strhashFallback(unsafe.Pointer(&g.rules[i]), uintptr(seed))) & g.level1Mask
-				if occ[n] {
-					for _, n := range tmpOcc {
-						occ[n] = false
-					}
-					seed++
-					findSeed = false
-					break
-				}
-				occ[n] = true
-				tmpOcc = append(tmpOcc, n)
-				g.level1[n] = uint32(i)
-			}
-			if findSeed {
-				g.level0[bucket.n] = seed
-				break
-			}
-		}
-	}
-}
-
-func nextPow2(v int) int {
-	if v <= 1 {
-		return 1
-	}
-	const MaxUInt = ^uint(0)
-	n := (MaxUInt >> bits.LeadingZeros(uint(v))) + 1
-	return int(n)
-}
-
-// Lookup searches for s in t and returns its index and whether it was found.
-func (g *MphMatcherGroup) Lookup(h uint32, s string) bool {
-	i0 := int(h) & g.level0Mask
-	seed := g.level0[i0]
-	i1 := int(strhashFallback(unsafe.Pointer(&s), uintptr(seed))) & g.level1Mask
-	n := g.level1[i1]
-	return s == g.rules[int(n)]
-}
-
-// Match implements IndexMatcher.Match.
-func (g *MphMatcherGroup) Match(pattern string) []uint32 {
-	result := []uint32{}
-	hash := uint32(0)
-	for i := len(pattern) - 1; i >= 0; i-- {
-		hash = hash*PrimeRK + uint32(pattern[i])
-		if pattern[i] == '.' {
-			if g.Lookup(hash, pattern[i:]) {
-				result = append(result, 1)
-				return result
-			}
-		}
-	}
-	if g.Lookup(hash, pattern) {
-		result = append(result, 1)
-		return result
-	}
-	if g.ac != nil && g.ac.Match(pattern) {
-		result = append(result, 1)
-		return result
-	}
-	for _, e := range g.otherMatchers {
-		if e.m.Match(pattern) {
-			result = append(result, e.id)
-			return result
-		}
-	}
-	return nil
-}
-
-type indexBucket struct {
-	n    int
-	vals []int
-}
-
-type bySize []indexBucket
-
-func (s bySize) Len() int           { return len(s) }
-func (s bySize) Less(i, j int) bool { return len(s[i].vals) > len(s[j].vals) }
-func (s bySize) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
-
-type stringStruct struct {
-	str unsafe.Pointer
-	len int
-}
-
-func strhashFallback(a unsafe.Pointer, h uintptr) uintptr {
-	x := (*stringStruct)(a)
-	return memhashFallback(x.str, h, uintptr(x.len))
-}
-
-const (
-	// Constants for multiplication: four random odd 64-bit numbers.
-	m1 = 16877499708836156737
-	m2 = 2820277070424839065
-	m3 = 9497967016996688599
-	m4 = 15839092249703872147
-)
-
-var hashkey = [4]uintptr{1, 1, 1, 1}
-
-func memhashFallback(p unsafe.Pointer, seed, s uintptr) uintptr {
-	h := uint64(seed + s*hashkey[0])
-tail:
-	switch {
-	case s == 0:
-	case s < 4:
-		h ^= uint64(*(*byte)(p))
-		h ^= uint64(*(*byte)(add(p, s>>1))) << 8
-		h ^= uint64(*(*byte)(add(p, s-1))) << 16
-		h = rotl31(h*m1) * m2
-	case s <= 8:
-		h ^= uint64(readUnaligned32(p))
-		h ^= uint64(readUnaligned32(add(p, s-4))) << 32
-		h = rotl31(h*m1) * m2
-	case s <= 16:
-		h ^= readUnaligned64(p)
-		h = rotl31(h*m1) * m2
-		h ^= readUnaligned64(add(p, s-8))
-		h = rotl31(h*m1) * m2
-	case s <= 32:
-		h ^= readUnaligned64(p)
-		h = rotl31(h*m1) * m2
-		h ^= readUnaligned64(add(p, 8))
-		h = rotl31(h*m1) * m2
-		h ^= readUnaligned64(add(p, s-16))
-		h = rotl31(h*m1) * m2
-		h ^= readUnaligned64(add(p, s-8))
-		h = rotl31(h*m1) * m2
-	default:
-		v1 := h
-		v2 := uint64(seed * hashkey[1])
-		v3 := uint64(seed * hashkey[2])
-		v4 := uint64(seed * hashkey[3])
-		for s >= 32 {
-			v1 ^= readUnaligned64(p)
-			v1 = rotl31(v1*m1) * m2
-			p = add(p, 8)
-			v2 ^= readUnaligned64(p)
-			v2 = rotl31(v2*m2) * m3
-			p = add(p, 8)
-			v3 ^= readUnaligned64(p)
-			v3 = rotl31(v3*m3) * m4
-			p = add(p, 8)
-			v4 ^= readUnaligned64(p)
-			v4 = rotl31(v4*m4) * m1
-			p = add(p, 8)
-			s -= 32
-		}
-		h = v1 ^ v2 ^ v3 ^ v4
-		goto tail
-	}
-
-	h ^= h >> 29
-	h *= m3
-	h ^= h >> 32
-	return uintptr(h)
-}
-func add(p unsafe.Pointer, x uintptr) unsafe.Pointer {
-	return unsafe.Pointer(uintptr(p) + x)
-}
-func readUnaligned32(p unsafe.Pointer) uint32 {
-	q := (*[4]byte)(p)
-	return uint32(q[0]) | uint32(q[1])<<8 | uint32(q[2])<<16 | uint32(q[3])<<24
-}
-
-func rotl31(x uint64) uint64 {
-	return (x << 31) | (x >> (64 - 31))
-}
-func readUnaligned64(p unsafe.Pointer) uint64 {
-	q := (*[8]byte)(p)
-	return uint64(q[0]) | uint64(q[1])<<8 | uint64(q[2])<<16 | uint64(q[3])<<24 | uint64(q[4])<<32 | uint64(q[5])<<40 | uint64(q[6])<<48 | uint64(q[7])<<56
-}

common/strmatcher/strmatcher.go

@@ -27,7 +27,6 @@ const (
 
 // New creates a new Matcher based on the given pattern.
 func (t Type) New(pattern string) (Matcher, error) {
-	// 1. regex matching is case-sensitive
 	switch t {
 	case Full:
 		return fullMatcher(pattern), nil

common/strmatcher/strmatcher_test.go

@@ -91,172 +91,3 @@ func TestMatcherGroup(t *testing.T) {
 		}
 	}
 }
-
-func TestACAutomaton(t *testing.T) {
-	cases1 := []struct {
-		pattern string
-		mType   Type
-		input   string
-		output  bool
-	}{
-		{
-			pattern: "xtls.github.io",
-			mType:   Domain,
-			input:   "www.xtls.github.io",
-			output:  true,
-		},
-		{
-			pattern: "xtls.github.io",
-			mType:   Domain,
-			input:   "xtls.github.io",
-			output:  true,
-		},
-		{
-			pattern: "xtls.github.io",
-			mType:   Domain,
-			input:   "www.xtis.github.io",
-			output:  false,
-		},
-		{
-			pattern: "xtls.github.io",
-			mType:   Domain,
-			input:   "tls.github.io",
-			output:  false,
-		},
-		{
-			pattern: "xtls.github.io",
-			mType:   Domain,
-			input:   "xxtls.github.io",
-			output:  false,
-		},
-		{
-			pattern: "xtls.github.io",
-			mType:   Full,
-			input:   "xtls.github.io",
-			output:  true,
-		},
-		{
-			pattern: "xtls.github.io",
-			mType:   Full,
-			input:   "xxtls.github.io",
-			output:  false,
-		},
-	}
-	for _, test := range cases1 {
-		var ac = NewACAutomaton()
-		ac.Add(test.pattern, test.mType)
-		ac.Build()
-		if m := ac.Match(test.input); m != test.output {
-			t.Error("unexpected output: ", m, " for test case ", test)
-		}
-	}
-	{
-		cases2Input := []struct {
-			pattern string
-			mType   Type
-		}{
-			{
-				pattern: "163.com",
-				mType:   Domain,
-			},
-			{
-				pattern: "m.126.com",
-				mType:   Full,
-			},
-			{
-				pattern: "3.com",
-				mType:   Full,
-			},
-			{
-				pattern: "google.com",
-				mType:   Substr,
-			},
-			{
-				pattern: "vgoogle.com",
-				mType:   Substr,
-			},
-		}
-		var ac = NewACAutomaton()
-		for _, test := range cases2Input {
-			ac.Add(test.pattern, test.mType)
-		}
-		ac.Build()
-		cases2Output := []struct {
-			pattern string
-			res     bool
-		}{
-			{
-				pattern: "126.com",
-				res:     false,
-			},
-			{
-				pattern: "m.163.com",
-				res:     true,
-			},
-			{
-				pattern: "mm163.com",
-				res:     false,
-			},
-			{
-				pattern: "m.126.com",
-				res:     true,
-			},
-			{
-				pattern: "163.com",
-				res:     true,
-			},
-			{
-				pattern: "63.com",
-				res:     false,
-			},
-			{
-				pattern: "oogle.com",
-				res:     false,
-			},
-			{
-				pattern: "vvgoogle.com",
-				res:     true,
-			},
-		}
-		for _, test := range cases2Output {
-			if m := ac.Match(test.pattern); m != test.res {
-				t.Error("unexpected output: ", m, " for test case ", test)
-			}
-		}
-	}
-
-	{
-		cases3Input := []struct {
-			pattern string
-			mType   Type
-		}{
-			{
-				pattern: "video.google.com",
-				mType:   Domain,
-			},
-			{
-				pattern: "gle.com",
-				mType:   Domain,
-			},
-		}
-		var ac = NewACAutomaton()
-		for _, test := range cases3Input {
-			ac.Add(test.pattern, test.mType)
-		}
-		ac.Build()
-		cases3Output := []struct {
-			pattern string
-			res     bool
-		}{
-			{
-				pattern: "google.com",
-				res:     false,
-			},
-		}
-		for _, test := range cases3Output {
-			if m := ac.Match(test.pattern); m != test.res {
-				t.Error("unexpected output: ", m, " for test case ", test)
-			}
-		}
-	}
-}

core/core.go

@@ -18,7 +18,7 @@ import (
 )
 
 var (
-	version  = "1.4.3"
+	version  = "1.4.2"
 	build    = "Custom"
 	codename = "Xray, Penetrates Everything."
 	intro    = "A unified platform for anti-censorship."

features/dns/client.go

@@ -14,6 +14,12 @@ type IPOption struct {
 	FakeEnable bool
 }
 
+func (p *IPOption) Copy() *IPOption {
+	return &IPOption{p.IPv4Enable, p.IPv6Enable, p.FakeEnable}
+}
+
+type Option func(dopt *IPOption) *IPOption
+
 // Client is a Xray feature for querying DNS information.
 //
 // xray:api:stable
@@ -21,7 +27,24 @@ type Client interface {
 	features.Feature
 
 	// LookupIP returns IP address for the given domain. IPs may contain IPv4 and/or IPv6 addresses.
-	LookupIP(domain string, option IPOption) ([]net.IP, error)
+	LookupIP(domain string) ([]net.IP, error)
+
+	// LookupOptions query IP address for domain with *IPOption.
+	LookupOptions(domain string, opt ...Option) ([]net.IP, error)
+}
+
+// IPv4Lookup is an optional feature for querying IPv4 addresses only.
+//
+// xray:api:beta
+type IPv4Lookup interface {
+	LookupIPv4(domain string) ([]net.IP, error)
+}
+
+// IPv6Lookup is an optional feature for querying IPv6 addresses only.
+//
+// xray:api:beta
+type IPv6Lookup interface {
+	LookupIPv6(domain string) ([]net.IP, error)
 }
 
 // ClientType returns the type of Client interface. Can be used for implementing common.HasType.
@@ -50,3 +73,35 @@ func RCodeFromError(err error) uint16 {
 	}
 	return 0
 }
+
+var (
+	LookupIPv4Only = func(d *IPOption) *IPOption {
+		d.IPv4Enable = true
+		d.IPv6Enable = false
+		return d
+	}
+	LookupIPv6Only = func(d *IPOption) *IPOption {
+		d.IPv4Enable = false
+		d.IPv6Enable = true
+		return d
+	}
+	LookupIP = func(d *IPOption) *IPOption {
+		d.IPv4Enable = true
+		d.IPv6Enable = true
+		return d
+	}
+	LookupFake = func(d *IPOption) *IPOption {
+		d.FakeEnable = true
+		return d
+	}
+	LookupNoFake = func(d *IPOption) *IPOption {
+		d.FakeEnable = false
+		return d
+	}
+
+	LookupAll = func(d *IPOption) *IPOption {
+		LookupIP(d)
+		LookupFake(d)
+		return d
+	}
+)

features/dns/localdns/client.go

@@ -20,43 +20,66 @@ func (*Client) Start() error { return nil }
 func (*Client) Close() error { return nil }
 
 // LookupIP implements Client.
-func (*Client) LookupIP(host string, option dns.IPOption) ([]net.IP, error) {
+func (*Client) LookupIP(host string) ([]net.IP, error) {
 	ips, err := net.LookupIP(host)
 	if err != nil {
 		return nil, err
 	}
 	parsedIPs := make([]net.IP, 0, len(ips))
-	ipv4 := make([]net.IP, 0, len(ips))
-	ipv6 := make([]net.IP, 0, len(ips))
 	for _, ip := range ips {
 		parsed := net.IPAddress(ip)
 		if parsed != nil {
 			parsedIPs = append(parsedIPs, parsed.IP())
 		}
+	}
+	if len(parsedIPs) == 0 {
+		return nil, dns.ErrEmptyResponse
+	}
+	return parsedIPs, nil
+}
+
+// LookupOptions implements Client.
+func (c *Client) LookupOptions(host string, _ ...dns.Option) ([]net.IP, error) {
+	return c.LookupIP(host)
+}
+
+// LookupIPv4 implements IPv4Lookup.
+func (c *Client) LookupIPv4(host string) ([]net.IP, error) {
+	ips, err := c.LookupIP(host)
+	if err != nil {
+		return nil, err
+	}
+	ipv4 := make([]net.IP, 0, len(ips))
+	for _, ip := range ips {
 		if len(ip) == net.IPv4len {
 			ipv4 = append(ipv4, ip)
 		}
+	}
+	if len(ipv4) == 0 {
+		return nil, dns.ErrEmptyResponse
+	}
+	return ipv4, nil
+}
+
+// LookupIPv6 implements IPv6Lookup.
+func (c *Client) LookupIPv6(host string) ([]net.IP, error) {
+	ips, err := c.LookupIP(host)
+	if err != nil {
+		return nil, err
+	}
+	ipv6 := make([]net.IP, 0, len(ips))
+	for _, ip := range ips {
 		if len(ip) == net.IPv6len {
 			ipv6 = append(ipv6, ip)
 		}
 	}
-	switch {
+	if len(ipv6) == 0 {
-	case option.IPv4Enable && option.IPv6Enable:
-		if len(parsedIPs) > 0 {
-			return parsedIPs, nil
-		}
-	case option.IPv4Enable:
-		if len(ipv4) > 0 {
-			return ipv4, nil
-		}
-	case option.IPv6Enable:
-		if len(ipv6) > 0 {
-			return ipv6, nil
-		}
-	}
 		return nil, dns.ErrEmptyResponse
 	}
 
+	return ipv6, nil
+}
+
 // New create a new dns.Client that queries localhost for DNS.
 func New() *Client {
 	return &Client{}

features/routing/context.go

@@ -37,4 +37,7 @@ type Context interface {
 
 	// GetAttributes returns extra attributes from the conneciont content.
 	GetAttributes() map[string]string
+
+	// GetSkipDNSResolve returns a flag switch for weather skip dns resolve during route pick.
+	GetSkipDNSResolve() bool
 }

features/routing/dns/context.go

@@ -26,16 +26,12 @@ func (ctx *ResolvableContext) GetTargetIPs() []net.IP {
 	}
 
 	if domain := ctx.GetTargetDomain(); len(domain) != 0 {
-		ips, err := ctx.dnsClient.LookupIP(domain, dns.IPOption{
+		ips, err := ctx.dnsClient.LookupIP(domain)
-			IPv4Enable: true,
-			IPv6Enable: true,
-			FakeEnable: false,
-		})
 		if err == nil {
 			ctx.resolvedIPs = ips
 			return ips
 		}
-		newError("resolve ip for ", domain).Base(err).WriteToLog()
+		newError("failed to resolve ip for ", domain).Base(err).WriteToLog()
 	}
 
 	return nil

features/routing/session/context.go

@@ -109,6 +109,14 @@ func (ctx *Context) GetAttributes() map[string]string {
 	return ctx.Content.Attributes
 }
 
+// GetSkipDNSResolve implements routing.Context.
+func (ctx *Context) GetSkipDNSResolve() bool {
+	if ctx.Content == nil {
+		return false
+	}
+	return ctx.Content.SkipDNSResolve
+}
+
 // AsRoutingContext creates a context from context.context with session info.
 func AsRoutingContext(ctx context.Context) routing.Context {
 	return &Context{

go.mod

@@ -1,48 +1,27 @@
 module github.com/xtls/xray-core
 
-go 1.17
+go 1.16
 
 require (
 	github.com/ghodss/yaml v1.0.1-0.20190212211648-25d852aebe32
-	github.com/golang/mock v1.6.0
+	github.com/golang/mock v1.5.0
 	github.com/golang/protobuf v1.5.2
-	github.com/google/go-cmp v0.5.6
+	github.com/google/go-cmp v0.5.5
 	github.com/gorilla/websocket v1.4.2
-	github.com/lucas-clemente/quic-go v0.23.0
+	github.com/lucas-clemente/quic-go v0.20.0
-	github.com/miekg/dns v1.1.43
+	github.com/miekg/dns v1.1.41
-	github.com/pelletier/go-toml v1.9.4
+	github.com/pelletier/go-toml v1.8.1
-	github.com/pires/go-proxyproto v0.6.0
+	github.com/pires/go-proxyproto v0.5.0
-	github.com/refraction-networking/utls v0.0.0-20210713165636-0b2885c8c0d4
+	github.com/refraction-networking/utls v0.0.0-20201210053706-2179f286686b
 	github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c
 	github.com/stretchr/testify v1.7.0
 	github.com/xtls/go v0.0.0-20201118062508-3632bf3b7499
-	go.starlark.net v0.0.0-20210901212718-87f333178d59
+	go.starlark.net v0.0.0-20210312235212-74c10e2c17dc
-	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
+	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
-	golang.org/x/net v0.0.0-20210903162142-ad29c8ab022f
+	golang.org/x/net v0.0.0-20210330230544-e57232859fb2
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/sys v0.0.0-20210906170528-6f6e22806c34
+	golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44
-	google.golang.org/grpc v1.40.0
+	google.golang.org/grpc v1.36.1
-	google.golang.org/protobuf v1.27.1
+	google.golang.org/protobuf v1.26.0
-	h12.io/socks v1.0.3
+	h12.io/socks v1.0.2
-)
-
-require (
-	github.com/cheekybits/genny v1.0.0 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165 // indirect
-	github.com/fsnotify/fsnotify v1.5.1 // indirect
-	github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect
-	github.com/marten-seemann/qtls-go1-16 v0.1.4 // indirect
-	github.com/marten-seemann/qtls-go1-17 v0.1.0 // indirect
-	github.com/nxadm/tail v1.4.8 // indirect
-	github.com/onsi/ginkgo v1.16.4 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	golang.org/x/mod v0.5.0 // indirect
-	golang.org/x/text v0.3.7 // indirect
-	golang.org/x/tools v0.1.5 // indirect
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/genproto v0.0.0-20210903162649-d08c68adba83 // indirect
-	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )

go.sum

@@ -8,23 +8,18 @@ dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1
 dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
 git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
-github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBTaaSFSlLx/70C2HPIMNZpVV8+vt/A+FMnYP11g=
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
 github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wXkRAgjxjQ=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -34,35 +29,29 @@ github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165/go.mod h1:c9O8+fp
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
 github.com/francoispqt/gojay v1.2.13/go.mod h1:ehT5mTG4ua4581f1++1WLG0vPdaA9HaiDsoyrBGkyDY=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
-github.com/fsnotify/fsnotify v1.5.1 h1:mZcQUHVQUQWoPXXtuf9yuEXKudkV2sx1E06UadKWpgI=
-github.com/fsnotify/fsnotify v1.5.1/go.mod h1:T3375wBYaZdLLcVNkcVbzGHY7f1l/uK5T5Ai1i3InKU=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/ghodss/yaml v1.0.1-0.20190212211648-25d852aebe32 h1:Mn26/9ZMNWSw9C9ERFA1PUxfmGpolnw2v0bKOREu5ew=
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@@ -70,7 +59,6 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
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@@ -81,9 +69,8 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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@@ -96,7 +83,6 @@ github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0U
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@@ -110,44 +96,39 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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@@ -156,9 +137,8 @@ github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:
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@@ -187,7 +167,6 @@ github.com/shurcooL/users v0.0.0-20180125191416-49c67e49c537/go.mod h1:QJTqeLYED
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@@ -199,12 +178,9 @@ github.com/viant/assertly v0.4.8/go.mod h1:aGifi++jvCrUaklKEKT0BU95igDNaqkvz+49u
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 github.com/xtls/go v0.0.0-20201118062508-3632bf3b7499/go.mod h1:5TB2+k58gx4A4g2Nf5miSHNDF6CuAzHKpWBooLAshTs=
-github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
-go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
+go.starlark.net v0.0.0-20210312235212-74c10e2c17dc h1:pVkptfeOTFfx+zXZo7HEHN3d5LmhatBFvHdm/f2QnpY=
-go.starlark.net v0.0.0-20210901212718-87f333178d59 h1:F8ArBy9n1l7HE1JjzOIYqweEqoUlywy5+L3bR0tIa9g=
+go.starlark.net v0.0.0-20210312235212-74c10e2c17dc/go.mod h1:t3mmBBPzAVvK0L0n1drDmrQsJ8FoIx4INCqVMTr/Zo0=
-go.starlark.net v0.0.0-20210901212718-87f333178d59/go.mod h1:t3mmBBPzAVvK0L0n1drDmrQsJ8FoIx4INCqVMTr/Zo0=
 go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1yOyC1qaOBpL57BhE=
 golang.org/x/build v0.0.0-20190111050920-041ab4dc3f9d/go.mod h1:OWs+y06UdEOHN4y+MfF/py+xQ/tYqIWW03b70/CG9Rw=
 golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -213,19 +189,14 @@ golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 h1:HWj/xjIHfjYU5nVXpTM0s39J9CbLn7Cc5a7IC5rwsMQ=
+golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2 h1:It14KIkyBFYkHkwZ7k45minvA9aorojkyjGk9KJ5B/w=
-golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20180702182130-06c8688daad7/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20210508222113-6edffad5e616/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
-golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.5.0 h1:UG21uOlmZabA4fW5i7ZX6bjw1xELEGg/ZLgZq9auk/Q=
-golang.org/x/mod v0.5.0/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -239,25 +210,20 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
+golang.org/x/net v0.0.0-20210330230544-e57232859fb2 h1:nGCZOty+lVDsc4H2qPFksI5Se296+V+GhMiL/TzmYNk=
-golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
+golang.org/x/net v0.0.0-20210330230544-e57232859fb2/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
-golang.org/x/net v0.0.0-20210903162142-ad29c8ab022f h1:w6wWR0H+nyVpbSAQbzVEIACVyr/h8l/BEkY6Sokc7Eg=
-golang.org/x/net v0.0.0-20210903162142-ad29c8ab022f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181017192945-9dcd33a902f4/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181203162652-d668ce993890/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/perf v0.0.0-20180704124530-6e6d33e29852/go.mod h1:JLpeXjPJfIyPr5TlbXLkXWLhP8nz10XfvxElABhCtcw=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -274,24 +240,16 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20210303074136-134d130e1a04/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44 h1:Bli41pIlzTzf3KEY06n+xnzK/BESIg2ze4Pgfh/aI8c=
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 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
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+golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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@@ -303,11 +261,6 @@ golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
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 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
-golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.5 h1:ouewzE6p+/VEB31YYnTbEJdi8pFqKp4P4n85vwo3DHA=
-golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -326,10 +279,8 @@ google.golang.org/genproto v0.0.0-20181029155118-b69ba1387ce2/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20181202183823-bd91e49a0898/go.mod h1:7Ep/1NZk928CDR8SjdVbjWNpdIf6nzjE3BTgJDr2Atg=
 google.golang.org/genproto v0.0.0-20190306203927-b5d61aea6440/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
-google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 h1:+kGHl1aib/qcwaRi1CbqBZ1rk19r85MNUf8HaBghugY=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20210903162649-d08c68adba83 h1:3V2dxSZpz4zozWWUq36vUxXEKnSYitEH2LdsAx+RUmg=
-google.golang.org/genproto v0.0.0-20210903162649-d08c68adba83/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
 google.golang.org/grpc v1.14.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.16.0/go.mod h1:0JHn/cJsOMiMfNA9+DeHDlAU7KAAB5GDlYFpa9MZMio=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
@@ -337,10 +288,8 @@ google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZi
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
+google.golang.org/grpc v1.36.1 h1:cmUfbeGKnz9+2DD/UYsMQXeqbHZqZDs4eQwW0sFOpBY=
-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.36.1/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.40.0 h1:AGJ0Ih4mHjSeibYkFGh1dD9KJ/eOtZ93I6hoHhukQ5Q=
-google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -351,9 +300,8 @@ google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
-google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -363,18 +311,15 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkep
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c h1:grhR+C34yXImVGp7EzNk+DTIk+323eIUWOmEevy6bDo=
 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
-gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 grpc.go4.org v0.0.0-20170609214715-11d0a25b4919/go.mod h1:77eQGdRu53HpSqPFJFmuJdjuHRquDANNeA4x7B8WQ9o=
-h12.io/socks v1.0.3 h1:Ka3qaQewws4j4/eDQnOdpr4wXsC//dXtWvftlIcCQUo=
+h12.io/socks v1.0.2 h1:cZhhbV8+DE0Y1kotwhr1a3RC3kFO7AtuZ4GLr3qKSc8=
-h12.io/socks v1.0.3/go.mod h1:AIhxy1jOId/XCz9BO+EIgNL2rQiPTBNnOfnVnQ+3Eck=
+h12.io/socks v1.0.2/go.mod h1:AIhxy1jOId/XCz9BO+EIgNL2rQiPTBNnOfnVnQ+3Eck=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

infra/conf/dns.go

@@ -12,7 +12,9 @@ import (
 
 type NameServerConfig struct {
 	Address      *Address
+	ClientIP     *Address
 	Port         uint16
+	SkipFallback bool
 	Domains      []string
 	ExpectIPs    StringList
 }
@@ -26,13 +28,17 @@ func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
 
 	var advanced struct {
 		Address      *Address   `json:"address"`
+		ClientIP     *Address   `json:"clientIp"`
 		Port         uint16     `json:"port"`
+		SkipFallback bool       `json:"skipFallback"`
 		Domains      []string   `json:"domains"`
 		ExpectIPs    StringList `json:"expectIps"`
 	}
 	if err := json.Unmarshal(data, &advanced); err == nil {
 		c.Address = advanced.Address
+		c.ClientIP = advanced.ClientIP
 		c.Port = advanced.Port
+		c.SkipFallback = advanced.SkipFallback
 		c.Domains = advanced.Domains
 		c.ExpectIPs = advanced.ExpectIPs
 		return nil
@@ -87,12 +93,21 @@ func (c *NameServerConfig) Build() (*dns.NameServer, error) {
 		return nil, newError("invalid IP rule: ", c.ExpectIPs).Base(err)
 	}
 
+	var myClientIP []byte
+	if c.ClientIP != nil {
+		if !c.ClientIP.Family().IsIP() {
+			return nil, newError("not an IP address:", c.ClientIP.String())
+		}
+		myClientIP = []byte(c.ClientIP.IP())
+	}
 	return &dns.NameServer{
 		Address: &net.Endpoint{
 			Network: net.Network_UDP,
 			Address: c.Address.Build(),
 			Port:    uint32(c.Port),
 		},
+		ClientIp:          myClientIP,
+		SkipFallback:      c.SkipFallback,
 		PrioritizedDomain: domains,
 		Geoip:             geoipList,
 		OriginalRules:     originalRules,
@@ -109,27 +124,71 @@ var typeMap = map[router.Domain_Type]dns.DomainMatchingType{
 // DNSConfig is a JSON serializable object for dns.Config.
 type DNSConfig struct {
 	Servers         []*NameServerConfig     `json:"servers"`
-	Hosts    map[string]*Address `json:"hosts"`
+	Hosts           map[string]*HostAddress `json:"hosts"`
 	ClientIP        *Address                `json:"clientIp"`
 	Tag             string                  `json:"tag"`
+	QueryStrategy   string                  `json:"queryStrategy"`
+	CacheStrategy   string                  `json:"cacheStrategy"`
+	DisableCache    bool                    `json:"disableCache"`
+	DisableFallback bool                    `json:"disableFallback"`
 }
 
-func getHostMapping(addr *Address) *dns.Config_HostMapping {
+type HostAddress struct {
-	if addr.Family().IsIP() {
+	addr  *Address
-		return &dns.Config_HostMapping{
+	addrs []*Address
-			Ip: [][]byte{[]byte(addr.IP())},
 }
-	} else {
+
+// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
+func (h *HostAddress) UnmarshalJSON(data []byte) error {
+	addr := new(Address)
+	var addrs []*Address
+	switch {
+	case json.Unmarshal(data, &addr) == nil:
+		h.addr = addr
+	case json.Unmarshal(data, &addrs) == nil:
+		h.addrs = addrs
+	default:
+		return newError("invalid address")
+	}
+	return nil
+}
+
+func getHostMapping(ha *HostAddress) *dns.Config_HostMapping {
+	if ha.addr != nil {
+		if ha.addr.Family().IsDomain() {
+			return &dns.Config_HostMapping{
+				ProxiedDomain: ha.addr.Domain(),
+			}
+		}
+		return &dns.Config_HostMapping{
+			Ip: [][]byte{ha.addr.IP()},
+		}
+	}
+
+	ips := make([][]byte, 0, len(ha.addrs))
+	for _, addr := range ha.addrs {
+		if addr.Family().IsDomain() {
 			return &dns.Config_HostMapping{
 				ProxiedDomain: addr.Domain(),
 			}
 		}
+		ips = append(ips, []byte(addr.IP()))
+	}
+	return &dns.Config_HostMapping{
+		Ip: ips,
+	}
 }
 
 // Build implements Buildable
 func (c *DNSConfig) Build() (*dns.Config, error) {
 	config := &dns.Config{
 		Tag:             c.Tag,
+		CacheStrategy:   dns.CacheStrategy_Cache_ALL,
+		DisableFallback: c.DisableFallback,
+	}
+
+	if c.DisableCache {
+		config.CacheStrategy = dns.CacheStrategy_Cache_DISABLE
 	}
 
 	if c.ClientIP != nil {
@@ -139,6 +198,25 @@ func (c *DNSConfig) Build() (*dns.Config, error) {
 		config.ClientIp = []byte(c.ClientIP.IP())
 	}
 
+	config.QueryStrategy = dns.QueryStrategy_USE_IP
+	switch strings.ToLower(c.QueryStrategy) {
+	case "useip", "use_ip", "use-ip":
+		config.QueryStrategy = dns.QueryStrategy_USE_IP
+	case "useip4", "useipv4", "use_ip4", "use_ipv4", "use_ip_v4", "use-ip4", "use-ipv4", "use-ip-v4":
+		config.QueryStrategy = dns.QueryStrategy_USE_IP4
+	case "useip6", "useipv6", "use_ip6", "use_ipv6", "use_ip_v6", "use-ip6", "use-ipv6", "use-ip-v6":
+		config.QueryStrategy = dns.QueryStrategy_USE_IP6
+	}
+
+	switch strings.ToLower(c.CacheStrategy) {
+	case "noerror":
+		config.CacheStrategy = dns.CacheStrategy_Cache_NOERROR
+	case "all":
+		config.CacheStrategy = dns.CacheStrategy_Cache_ALL
+	case "disable", "none":
+		config.CacheStrategy = dns.CacheStrategy_Cache_DISABLE
+	}
+
 	for _, server := range c.Servers {
 		ns, err := server.Build()
 		if err != nil {

infra/conf/dns_test.go

@@ -67,17 +67,23 @@ func TestDNSConfigParsing(t *testing.T) {
 			Input: `{
 				"servers": [{
 					"address": "8.8.8.8",
+					"clientIp": "10.0.0.1",
 					"port": 5353,
+					"skipFallback": true,
 					"domains": ["domain:example.com"]
 				}],
 				"hosts": {
 					"example.com": "127.0.0.1",
+					"xtls.github.io": ["1.2.3.4", "5.6.7.8"],
 					"domain:example.com": "google.com",
-					"geosite:test": "10.0.0.1",
+					"geosite:test": ["127.0.0.1", "127.0.0.2"],
-					"keyword:google": "8.8.8.8",
+					"keyword:google": ["8.8.8.8", "8.8.4.4"],
 					"regexp:.*\\.com": "8.8.4.4"
 				},
-				"clientIp": "10.0.0.1"
+				"clientIp": "10.0.0.1",
+				"queryStrategy": "UseIPv4",
+				"cacheStrategy": "disable",
+				"disableFallback": true
 			}`,
 			Parser: parserCreator(),
 			Output: &dns.Config{
@@ -92,6 +98,8 @@ func TestDNSConfigParsing(t *testing.T) {
 							Network: net.Network_UDP,
 							Port:    5353,
 						},
+						ClientIp:     []byte{10, 0, 0, 1},
+						SkipFallback: true,
 						PrioritizedDomain: []*dns.NameServer_PriorityDomain{
 							{
 								Type:   dns.DomainMatchingType_Subdomain,
@@ -120,20 +128,28 @@ func TestDNSConfigParsing(t *testing.T) {
 					{
 						Type:   dns.DomainMatchingType_Full,
 						Domain: "example.com",
-						Ip:     [][]byte{{10, 0, 0, 1}},
+						Ip:     [][]byte{{127, 0, 0, 1}, {127, 0, 0, 2}},
 					},
 					{
 						Type:   dns.DomainMatchingType_Keyword,
 						Domain: "google",
-						Ip:     [][]byte{{8, 8, 8, 8}},
+						Ip:     [][]byte{{8, 8, 8, 8}, {8, 8, 4, 4}},
 					},
 					{
 						Type:   dns.DomainMatchingType_Regex,
 						Domain: ".*\\.com",
 						Ip:     [][]byte{{8, 8, 4, 4}},
 					},
+					{
+						Type:   dns.DomainMatchingType_Full,
+						Domain: "xtls.github.io",
+						Ip:     [][]byte{{1, 2, 3, 4}, {5, 6, 7, 8}},
+					},
 				},
 				ClientIp:        []byte{10, 0, 0, 1},
+				QueryStrategy:   dns.QueryStrategy_USE_IP4,
+				CacheStrategy:   dns.CacheStrategy_Cache_DISABLE,
+				DisableFallback: true,
 			},
 		},
 	})

infra/conf/freedom.go

@@ -22,11 +22,11 @@ func (c *FreedomConfig) Build() (proto.Message, error) {
 	config := new(freedom.Config)
 	config.DomainStrategy = freedom.Config_AS_IS
 	switch strings.ToLower(c.DomainStrategy) {
-	case "useip", "use_ip":
+	case "useip", "use_ip", "use-ip":
 		config.DomainStrategy = freedom.Config_USE_IP
-	case "useip4", "useipv4", "use_ipv4", "use_ip_v4", "use_ip4":
+	case "useip4", "useipv4", "use_ip4", "use_ipv4", "use_ip_v4", "use-ip4", "use-ipv4", "use-ip-v4":
 		config.DomainStrategy = freedom.Config_USE_IP4
-	case "useip6", "useipv6", "use_ipv6", "use_ip_v6", "use_ip6":
+	case "useip6", "useipv6", "use_ip6", "use_ipv6", "use_ip_v6", "use-ip6", "use-ipv6", "use-ip-v6":
 		config.DomainStrategy = freedom.Config_USE_IP6
 	}
 

infra/conf/grpc.go

@@ -9,23 +9,8 @@ import (
 type GRPCConfig struct {
 	ServiceName string `json:"serviceName"`
 	MultiMode   bool   `json:"multiMode"`
-	IdleTimeout         int32  `json:"idle_timeout"`
-	HealthCheckTimeout  int32  `json:"health_check_timeout"`
-	PermitWithoutStream bool   `json:"permit_without_stream"`
 }
 
-func (g *GRPCConfig) Build() (proto.Message, error) {
+func (g GRPCConfig) Build() (proto.Message, error) {
-	if g.IdleTimeout <= 0 {
+	return &grpc.Config{ServiceName: g.ServiceName, MultiMode: g.MultiMode}, nil
-		g.IdleTimeout = 0
-	}
-	if g.HealthCheckTimeout <= 0 {
-		g.HealthCheckTimeout = 0
-	}
-	return &grpc.Config{
-		ServiceName:         g.ServiceName,
-		MultiMode:           g.MultiMode,
-		IdleTimeout:         g.IdleTimeout,
-		HealthCheckTimeout:  g.HealthCheckTimeout,
-		PermitWithoutStream: g.PermitWithoutStream,
-	}, nil
 }

infra/conf/loopback.go

@@ -0,0 +1,14 @@
+package conf
+
+import (
+	"github.com/golang/protobuf/proto"
+	"github.com/xtls/xray-core/proxy/loopback"
+)
+
+type LoopbackConfig struct {
+	InboundTag string `json:"inboundTag"`
+}
+
+func (l LoopbackConfig) Build() (proto.Message, error) {
+	return &loopback.Config{InboundTag: l.InboundTag}, nil
+}

infra/conf/router.go

@@ -98,8 +98,6 @@ type RouterRule struct {
 	Type        string `json:"type"`
 	OutboundTag string `json:"outboundTag"`
 	BalancerTag string `json:"balancerTag"`
-
-	DomainMatcher string `json:"domainMatcher"`
 }
 
 func ParseIP(s string) (*router.CIDR, error) {
@@ -493,10 +491,6 @@ func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
 		return nil, newError("neither outboundTag nor balancerTag is specified in routing rule")
 	}
 
-	if rawFieldRule.DomainMatcher != "" {
-		rule.DomainMatcher = rawFieldRule.DomainMatcher
-	}
-
 	if rawFieldRule.Domain != nil {
 		for _, domain := range *rawFieldRule.Domain {
 			rules, err := parseDomainRule(domain)

infra/conf/transport_internet.go

@@ -181,22 +181,12 @@ func (c *WebSocketConfig) Build() (proto.Message, error) {
 type HTTPConfig struct {
 	Host *StringList `json:"host"`
 	Path string      `json:"path"`
-	ReadIdleTimeout    int32       `json:"read_idle_timeout"`
-	HealthCheckTimeout int32       `json:"health_check_timeout"`
 }
 
 // Build implements Buildable.
 func (c *HTTPConfig) Build() (proto.Message, error) {
-	if c.ReadIdleTimeout <= 0 {
-		c.ReadIdleTimeout = 0
-	}
-	if c.HealthCheckTimeout <= 0 {
-		c.HealthCheckTimeout = 0
-	}
 	config := &http.Config{
 		Path: c.Path,
-		IdleTimeout:        c.ReadIdleTimeout,
-		HealthCheckTimeout: c.HealthCheckTimeout,
 	}
 	if c.Host != nil {
 		config.Host = []string(*c.Host)
@@ -332,7 +322,6 @@ type TLSConfig struct {
 	CipherSuites             string           `json:"cipherSuites"`
 	PreferServerCipherSuites bool             `json:"preferServerCipherSuites"`
 	Fingerprint              string           `json:"fingerprint"`
-	RejectUnknownSNI         bool             `json:"rejectUnknownSni"`
 }
 
 // Build implements Buildable.
@@ -361,7 +350,6 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 	config.CipherSuites = c.CipherSuites
 	config.PreferServerCipherSuites = c.PreferServerCipherSuites
 	config.Fingerprint = strings.ToLower(c.Fingerprint)
-	config.RejectUnknownSni = c.RejectUnknownSNI
 	return config, nil
 }
 
@@ -425,7 +413,6 @@ type XTLSConfig struct {
 	MaxVersion               string            `json:"maxVersion"`
 	CipherSuites             string            `json:"cipherSuites"`
 	PreferServerCipherSuites bool              `json:"preferServerCipherSuites"`
-	RejectUnknownSNI         bool              `json:"rejectUnknownSni"`
 }
 
 // Build implements Buildable.
@@ -453,7 +440,6 @@ func (c *XTLSConfig) Build() (proto.Message, error) {
 	config.MaxVersion = c.MaxVersion
 	config.CipherSuites = c.CipherSuites
 	config.PreferServerCipherSuites = c.PreferServerCipherSuites
-	config.RejectUnknownSni = c.RejectUnknownSNI
 	return config, nil
 }
 

infra/conf/xray.go

@@ -2,11 +2,12 @@ package conf
 
 import (
 	"encoding/json"
-	"github.com/xtls/xray-core/transport/internet"
 	"log"
 	"os"
 	"strings"
 
+	"github.com/xtls/xray-core/transport/internet"
+
 	"github.com/xtls/xray-core/app/dispatcher"
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/app/stats"
@@ -38,6 +39,7 @@ var (
 		"trojan":      func() interface{} { return new(TrojanClientConfig) },
 		"mtproto":     func() interface{} { return new(MTProtoClientConfig) },
 		"dns":         func() interface{} { return new(DNSOutboundConfig) },
+		"loopback":    func() interface{} { return new(LoopbackConfig) },
 	}, "protocol", "settings")
 
 	ctllog = log.New(os.Stderr, "xctl> ", 0)

proxy/dns/dns.go

@@ -43,6 +43,7 @@ type Handler struct {
 
 func (h *Handler) Init(config *Config, dnsClient dns.Client) error {
 	h.client = dnsClient
+
 	if v, ok := dnsClient.(ownLinkVerifier); ok {
 		h.ownLinkVerifier = v
 	}
@@ -198,22 +199,16 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
 	var err error
 
 	var ttl uint32 = 600
+	var opt dns.Option
 
 	switch qType {
 	case dnsmessage.TypeA:
-		ips, err = h.client.LookupIP(domain, dns.IPOption{
+		opt = dns.LookupIPv4Only
-			IPv4Enable: true,
-			IPv6Enable: false,
-			FakeEnable: true,
-		})
 	case dnsmessage.TypeAAAA:
-		ips, err = h.client.LookupIP(domain, dns.IPOption{
+		opt = dns.LookupIPv6Only
-			IPv4Enable: false,
-			IPv6Enable: true,
-			FakeEnable: true,
-		})
 	}
 
+	ips, err = h.client.LookupOptions(domain, opt, dns.LookupFake)
 	rcode := dns.RCodeFromError(err)
 	if rcode == 0 && len(ips) == 0 && err != dns.ErrEmptyResponse {
 		newError("ip query").Base(err).WriteToLog()
@@ -228,7 +223,6 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
 		RecursionAvailable: true,
 		RecursionDesired:   true,
 		Response:           true,
-		Authoritative:      true,
 	})
 	builder.EnableCompression()
 	common.Must(builder.StartQuestions())

proxy/freedom/freedom.go

@@ -59,26 +59,14 @@ func (h *Handler) policy() policy.Session {
 }
 
 func (h *Handler) resolveIP(ctx context.Context, domain string, localAddr net.Address) net.Address {
-	var option dns.IPOption = dns.IPOption{
+	var opt dns.Option
-		IPv4Enable: true,
-		IPv6Enable: true,
-		FakeEnable: false,
-	}
 	if h.config.DomainStrategy == Config_USE_IP4 || (localAddr != nil && localAddr.Family().IsIPv4()) {
-		option = dns.IPOption{
+		opt = dns.LookupIPv4Only
-			IPv4Enable: true,
-			IPv6Enable: false,
-			FakeEnable: false,
-		}
 	} else if h.config.DomainStrategy == Config_USE_IP6 || (localAddr != nil && localAddr.Family().IsIPv6()) {
-		option = dns.IPOption{
+		opt = dns.LookupIPv6Only
-			IPv4Enable: false,
-			IPv6Enable: true,
-			FakeEnable: false,
-		}
 	}
 
-	ips, err := h.dns.LookupIP(domain, option)
+	ips, err := h.dns.LookupOptions(domain, opt, dns.LookupNoFake)
 	if err != nil {
 		newError("failed to get IP address for domain ", domain).Base(err).WriteToLog(session.ExportIDToError(ctx))
 	}

proxy/loopback/config.pb.go

@@ -0,0 +1,149 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.15.8
+// source: proxy/loopback/config.proto
+
+package loopback
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	InboundTag string `protobuf:"bytes,1,opt,name=inbound_tag,json=inboundTag,proto3" json:"inbound_tag,omitempty"`
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proxy_loopback_config_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_proxy_loopback_config_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_proxy_loopback_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Config) GetInboundTag() string {
+	if x != nil {
+		return x.InboundTag
+	}
+	return ""
+}
+
+var File_proxy_loopback_config_proto protoreflect.FileDescriptor
+
+var file_proxy_loopback_config_proto_rawDesc = []byte{
+	0x0a, 0x1b, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x6c, 0x6f, 0x6f, 0x70, 0x62, 0x61, 0x63, 0x6b,
+	0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x13, 0x78,
+	0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e, 0x6c, 0x6f, 0x6f, 0x70, 0x62, 0x61,
+	0x63, 0x6b, 0x22, 0x29, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x1f, 0x0a, 0x0b,
+	0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x5f, 0x74, 0x61, 0x67, 0x18, 0x01, 0x20, 0x01, 0x28,
+	0x09, 0x52, 0x0a, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x54, 0x61, 0x67, 0x42, 0x5b, 0x0a,
+	0x17, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2e,
+	0x6c, 0x6f, 0x6f, 0x70, 0x62, 0x61, 0x63, 0x6b, 0x50, 0x01, 0x5a, 0x28, 0x67, 0x69, 0x74, 0x68,
+	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79,
+	0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x78, 0x79, 0x2f, 0x6c, 0x6f, 0x6f, 0x70,
+	0x62, 0x61, 0x63, 0x6b, 0xaa, 0x02, 0x13, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x50, 0x72, 0x6f, 0x78,
+	0x79, 0x2e, 0x4c, 0x6f, 0x6f, 0x70, 0x62, 0x61, 0x63, 0x6b, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x33,
+}
+
+var (
+	file_proxy_loopback_config_proto_rawDescOnce sync.Once
+	file_proxy_loopback_config_proto_rawDescData = file_proxy_loopback_config_proto_rawDesc
+)
+
+func file_proxy_loopback_config_proto_rawDescGZIP() []byte {
+	file_proxy_loopback_config_proto_rawDescOnce.Do(func() {
+		file_proxy_loopback_config_proto_rawDescData = protoimpl.X.CompressGZIP(file_proxy_loopback_config_proto_rawDescData)
+	})
+	return file_proxy_loopback_config_proto_rawDescData
+}
+
+var file_proxy_loopback_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_proxy_loopback_config_proto_goTypes = []interface{}{
+	(*Config)(nil), // 0: xray.proxy.loopback.Config
+}
+var file_proxy_loopback_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_proxy_loopback_config_proto_init() }
+func file_proxy_loopback_config_proto_init() {
+	if File_proxy_loopback_config_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_proxy_loopback_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Config); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_proxy_loopback_config_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_proxy_loopback_config_proto_goTypes,
+		DependencyIndexes: file_proxy_loopback_config_proto_depIdxs,
+		MessageInfos:      file_proxy_loopback_config_proto_msgTypes,
+	}.Build()
+	File_proxy_loopback_config_proto = out.File
+	file_proxy_loopback_config_proto_rawDesc = nil
+	file_proxy_loopback_config_proto_goTypes = nil
+	file_proxy_loopback_config_proto_depIdxs = nil
+}

proxy/loopback/config.proto

@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package xray.proxy.loopback;
+option csharp_namespace = "Xray.Proxy.Loopback";
+option go_package = "github.com/xtls/xray-core/proxy/loopback";
+option java_package = "com.xray.proxy.loopback";
+option java_multiple_files = true;
+
+message Config {
+  string inbound_tag = 1;
+}

proxy/loopback/errors.generated.go

@@ -0,0 +1,9 @@
+package loopback
+
+import "github.com/xtls/xray-core/common/errors"
+
+type errPathObjHolder struct{}
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).WithPathObj(errPathObjHolder{})
+}

proxy/loopback/lookback.go

@@ -0,0 +1,121 @@
+package loopback
+
+import (
+	"context"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/net/cnc"
+	"github.com/xtls/xray-core/common/retry"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/task"
+	core "github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport"
+	"github.com/xtls/xray-core/transport/internet"
+)
+
+type Loopback struct {
+	config             *Config
+	dispatcherInstance routing.Dispatcher
+}
+
+func (l *Loopback) Process(ctx context.Context, link *transport.Link, _ internet.Dialer) error {
+	outbound := session.OutboundFromContext(ctx)
+	if outbound == nil || !outbound.Target.IsValid() {
+		return newError("target not specified.")
+	}
+	destination := outbound.Target
+
+	newError("opening connection to ", destination).WriteToLog(session.ExportIDToError(ctx))
+
+	input := link.Reader
+	output := link.Writer
+
+	var conn internet.Connection
+	err := retry.ExponentialBackoff(5, 100).On(func() error {
+		dialDest := destination
+
+		content := new(session.Content)
+		content.SkipDNSResolve = true
+
+		ctx = session.ContextWithContent(ctx, content)
+
+		inbound := session.InboundFromContext(ctx)
+
+		inbound.Tag = l.config.InboundTag
+
+		ctx = session.ContextWithInbound(ctx, inbound)
+
+		rawConn, err := l.dispatcherInstance.Dispatch(ctx, dialDest)
+		if err != nil {
+			return err
+		}
+
+		var readerOpt cnc.ConnectionOption
+		if dialDest.Network == net.Network_TCP {
+			readerOpt = cnc.ConnectionOutputMulti(rawConn.Reader)
+		} else {
+			readerOpt = cnc.ConnectionOutputMultiUDP(rawConn.Reader)
+		}
+
+		conn = cnc.NewConnection(cnc.ConnectionInputMulti(rawConn.Writer), readerOpt)
+		return nil
+	})
+	if err != nil {
+		return newError("failed to open connection to ", destination).Base(err)
+	}
+	defer conn.Close()
+
+	requestDone := func() error {
+		var writer buf.Writer
+		if destination.Network == net.Network_TCP {
+			writer = buf.NewWriter(conn)
+		} else {
+			writer = &buf.SequentialWriter{Writer: conn}
+		}
+
+		if err := buf.Copy(input, writer); err != nil {
+			return newError("failed to process request").Base(err)
+		}
+
+		return nil
+	}
+
+	responseDone := func() error {
+		var reader buf.Reader
+		if destination.Network == net.Network_TCP {
+			reader = buf.NewReader(conn)
+		} else {
+			reader = buf.NewPacketReader(conn)
+		}
+		if err := buf.Copy(reader, output); err != nil {
+			return newError("failed to process response").Base(err)
+		}
+
+		return nil
+	}
+
+	if err := task.Run(ctx, requestDone, task.OnSuccess(responseDone, task.Close(output))); err != nil {
+		return newError("connection ends").Base(err)
+	}
+
+	return nil
+}
+
+func (l *Loopback) init(config *Config, dispatcherInstance routing.Dispatcher) error {
+	l.dispatcherInstance = dispatcherInstance
+	l.config = config
+	return nil
+}
+
+func init() {
+	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
+		l := new(Loopback)
+		err := core.RequireFeatures(ctx, func(dispatcherInstance routing.Dispatcher) error {
+			return l.init(config.(*Config), dispatcherInstance)
+		})
+		return l, err
+	}))
+}

proxy/loopback/loopback.go

@@ -0,0 +1,3 @@
+package loopback
+
+//go:generate go run github.com/xray/xray-core/common/errors/errorgen

testing/mocks/dns.go

@@ -5,36 +5,37 @@
 package mocks
 
 import (
-	gomock "github.com/golang/mock/gomock"
-	dns "github.com/xtls/xray-core/features/dns"
 	net "net"
 	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
+	dns "github.com/xtls/xray-core/features/dns"
 )
 
-// DNSClient is a mock of Client interface
+// DNSClient is a mock of Client interface.
 type DNSClient struct {
 	ctrl     *gomock.Controller
 	recorder *DNSClientMockRecorder
 }
 
-// DNSClientMockRecorder is the mock recorder for DNSClient
+// DNSClientMockRecorder is the mock recorder for DNSClient.
 type DNSClientMockRecorder struct {
 	mock *DNSClient
 }
 
-// NewDNSClient creates a new mock instance
+// NewDNSClient creates a new mock instance.
 func NewDNSClient(ctrl *gomock.Controller) *DNSClient {
 	mock := &DNSClient{ctrl: ctrl}
 	mock.recorder = &DNSClientMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *DNSClient) EXPECT() *DNSClientMockRecorder {
 	return m.recorder
 }
 
-// Close mocks base method
+// Close mocks base method.
 func (m *DNSClient) Close() error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Close")
@@ -42,28 +43,48 @@ func (m *DNSClient) Close() error {
 	return ret0
 }
 
-// Close indicates an expected call of Close
+// Close indicates an expected call of Close.
 func (mr *DNSClientMockRecorder) Close() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Close", reflect.TypeOf((*DNSClient)(nil).Close))
 }
 
-// LookupIP mocks base method
+// LookupIP mocks base method.
-func (m *DNSClient) LookupIP(arg0 string, arg1 dns.IPOption) ([]net.IP, error) {
+func (m *DNSClient) LookupIP(arg0 string) ([]net.IP, error) {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "LookupIP", arg0, arg1)
+	ret := m.ctrl.Call(m, "LookupIP", arg0)
 	ret0, _ := ret[0].([]net.IP)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }
 
-// LookupIP indicates an expected call of LookupIP
+// LookupIP indicates an expected call of LookupIP.
-func (mr *DNSClientMockRecorder) LookupIP(arg0, arg1 interface{}) *gomock.Call {
+func (mr *DNSClientMockRecorder) LookupIP(arg0 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "LookupIP", reflect.TypeOf((*DNSClient)(nil).LookupIP), arg0, arg1)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "LookupIP", reflect.TypeOf((*DNSClient)(nil).LookupIP), arg0)
 }
 
-// Start mocks base method
+// LookupOptions mocks base method.
+func (m *DNSClient) LookupOptions(arg0 string, arg1 ...dns.Option) ([]net.IP, error) {
+	m.ctrl.T.Helper()
+	varargs := []interface{}{arg0}
+	for _, a := range arg1 {
+		varargs = append(varargs, a)
+	}
+	ret := m.ctrl.Call(m, "LookupOptions", varargs...)
+	ret0, _ := ret[0].([]net.IP)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// LookupOptions indicates an expected call of LookupOptions.
+func (mr *DNSClientMockRecorder) LookupOptions(arg0 interface{}, arg1 ...interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	varargs := append([]interface{}{arg0}, arg1...)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "LookupOptions", reflect.TypeOf((*DNSClient)(nil).LookupOptions), varargs...)
+}
+
+// Start mocks base method.
 func (m *DNSClient) Start() error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Start")
@@ -71,13 +92,13 @@ func (m *DNSClient) Start() error {
 	return ret0
 }
 
-// Start indicates an expected call of Start
+// Start indicates an expected call of Start.
 func (mr *DNSClientMockRecorder) Start() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Start", reflect.TypeOf((*DNSClient)(nil).Start))
 }
 
-// Type mocks base method
+// Type mocks base method.
 func (m *DNSClient) Type() interface{} {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Type")
@@ -85,7 +106,7 @@ func (m *DNSClient) Type() interface{} {
 	return ret0
 }
 
-// Type indicates an expected call of Type
+// Type indicates an expected call of Type.
 func (mr *DNSClientMockRecorder) Type() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Type", reflect.TypeOf((*DNSClient)(nil).Type))

testing/mocks/io.go

@@ -5,34 +5,35 @@
 package mocks
 
 import (
-	gomock "github.com/golang/mock/gomock"
 	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
 )
 
-// Reader is a mock of Reader interface
+// Reader is a mock of Reader interface.
 type Reader struct {
 	ctrl     *gomock.Controller
 	recorder *ReaderMockRecorder
 }
 
-// ReaderMockRecorder is the mock recorder for Reader
+// ReaderMockRecorder is the mock recorder for Reader.
 type ReaderMockRecorder struct {
 	mock *Reader
 }
 
-// NewReader creates a new mock instance
+// NewReader creates a new mock instance.
 func NewReader(ctrl *gomock.Controller) *Reader {
 	mock := &Reader{ctrl: ctrl}
 	mock.recorder = &ReaderMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *Reader) EXPECT() *ReaderMockRecorder {
 	return m.recorder
 }
 
-// Read mocks base method
+// Read mocks base method.
 func (m *Reader) Read(arg0 []byte) (int, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Read", arg0)
@@ -41,36 +42,36 @@ func (m *Reader) Read(arg0 []byte) (int, error) {
 	return ret0, ret1
 }
 
-// Read indicates an expected call of Read
+// Read indicates an expected call of Read.
 func (mr *ReaderMockRecorder) Read(arg0 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Read", reflect.TypeOf((*Reader)(nil).Read), arg0)
 }
 
-// Writer is a mock of Writer interface
+// Writer is a mock of Writer interface.
 type Writer struct {
 	ctrl     *gomock.Controller
 	recorder *WriterMockRecorder
 }
 
-// WriterMockRecorder is the mock recorder for Writer
+// WriterMockRecorder is the mock recorder for Writer.
 type WriterMockRecorder struct {
 	mock *Writer
 }
 
-// NewWriter creates a new mock instance
+// NewWriter creates a new mock instance.
 func NewWriter(ctrl *gomock.Controller) *Writer {
 	mock := &Writer{ctrl: ctrl}
 	mock.recorder = &WriterMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *Writer) EXPECT() *WriterMockRecorder {
 	return m.recorder
 }
 
-// Write mocks base method
+// Write mocks base method.
 func (m *Writer) Write(arg0 []byte) (int, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Write", arg0)
@@ -79,7 +80,7 @@ func (m *Writer) Write(arg0 []byte) (int, error) {
 	return ret0, ret1
 }
 
-// Write indicates an expected call of Write
+// Write indicates an expected call of Write.
 func (mr *WriterMockRecorder) Write(arg0 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Write", reflect.TypeOf((*Writer)(nil).Write), arg0)

testing/mocks/log.go

@@ -5,41 +5,42 @@
 package mocks
 
 import (
+	reflect "reflect"
+
 	gomock "github.com/golang/mock/gomock"
 	log "github.com/xtls/xray-core/common/log"
-	reflect "reflect"
 )
 
-// LogHandler is a mock of Handler interface
+// LogHandler is a mock of Handler interface.
 type LogHandler struct {
 	ctrl     *gomock.Controller
 	recorder *LogHandlerMockRecorder
 }
 
-// LogHandlerMockRecorder is the mock recorder for LogHandler
+// LogHandlerMockRecorder is the mock recorder for LogHandler.
 type LogHandlerMockRecorder struct {
 	mock *LogHandler
 }
 
-// NewLogHandler creates a new mock instance
+// NewLogHandler creates a new mock instance.
 func NewLogHandler(ctrl *gomock.Controller) *LogHandler {
 	mock := &LogHandler{ctrl: ctrl}
 	mock.recorder = &LogHandlerMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *LogHandler) EXPECT() *LogHandlerMockRecorder {
 	return m.recorder
 }
 
-// Handle mocks base method
+// Handle mocks base method.
 func (m *LogHandler) Handle(arg0 log.Message) {
 	m.ctrl.T.Helper()
 	m.ctrl.Call(m, "Handle", arg0)
 }
 
-// Handle indicates an expected call of Handle
+// Handle indicates an expected call of Handle.
 func (mr *LogHandlerMockRecorder) Handle(arg0 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Handle", reflect.TypeOf((*LogHandler)(nil).Handle), arg0)

testing/mocks/mux.go

@@ -5,35 +5,36 @@
 package mocks
 
 import (
+	reflect "reflect"
+
 	gomock "github.com/golang/mock/gomock"
 	mux "github.com/xtls/xray-core/common/mux"
-	reflect "reflect"
 )
 
-// MuxClientWorkerFactory is a mock of ClientWorkerFactory interface
+// MuxClientWorkerFactory is a mock of ClientWorkerFactory interface.
 type MuxClientWorkerFactory struct {
 	ctrl     *gomock.Controller
 	recorder *MuxClientWorkerFactoryMockRecorder
 }
 
-// MuxClientWorkerFactoryMockRecorder is the mock recorder for MuxClientWorkerFactory
+// MuxClientWorkerFactoryMockRecorder is the mock recorder for MuxClientWorkerFactory.
 type MuxClientWorkerFactoryMockRecorder struct {
 	mock *MuxClientWorkerFactory
 }
 
-// NewMuxClientWorkerFactory creates a new mock instance
+// NewMuxClientWorkerFactory creates a new mock instance.
 func NewMuxClientWorkerFactory(ctrl *gomock.Controller) *MuxClientWorkerFactory {
 	mock := &MuxClientWorkerFactory{ctrl: ctrl}
 	mock.recorder = &MuxClientWorkerFactoryMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *MuxClientWorkerFactory) EXPECT() *MuxClientWorkerFactoryMockRecorder {
 	return m.recorder
 }
 
-// Create mocks base method
+// Create mocks base method.
 func (m *MuxClientWorkerFactory) Create() (*mux.ClientWorker, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Create")
@@ -42,7 +43,7 @@ func (m *MuxClientWorkerFactory) Create() (*mux.ClientWorker, error) {
 	return ret0, ret1
 }
 
-// Create indicates an expected call of Create
+// Create indicates an expected call of Create.
 func (mr *MuxClientWorkerFactoryMockRecorder) Create() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Create", reflect.TypeOf((*MuxClientWorkerFactory)(nil).Create))

testing/mocks/outbound.go

@@ -6,35 +6,36 @@ package mocks
 
 import (
 	context "context"
+	reflect "reflect"
+
 	gomock "github.com/golang/mock/gomock"
 	outbound "github.com/xtls/xray-core/features/outbound"
-	reflect "reflect"
 )
 
-// OutboundManager is a mock of Manager interface
+// OutboundManager is a mock of Manager interface.
 type OutboundManager struct {
 	ctrl     *gomock.Controller
 	recorder *OutboundManagerMockRecorder
 }
 
-// OutboundManagerMockRecorder is the mock recorder for OutboundManager
+// OutboundManagerMockRecorder is the mock recorder for OutboundManager.
 type OutboundManagerMockRecorder struct {
 	mock *OutboundManager
 }
 
-// NewOutboundManager creates a new mock instance
+// NewOutboundManager creates a new mock instance.
 func NewOutboundManager(ctrl *gomock.Controller) *OutboundManager {
 	mock := &OutboundManager{ctrl: ctrl}
 	mock.recorder = &OutboundManagerMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *OutboundManager) EXPECT() *OutboundManagerMockRecorder {
 	return m.recorder
 }
 
-// AddHandler mocks base method
+// AddHandler mocks base method.
 func (m *OutboundManager) AddHandler(arg0 context.Context, arg1 outbound.Handler) error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "AddHandler", arg0, arg1)
@@ -42,13 +43,13 @@ func (m *OutboundManager) AddHandler(arg0 context.Context, arg1 outbound.Handler
 	return ret0
 }
 
-// AddHandler indicates an expected call of AddHandler
+// AddHandler indicates an expected call of AddHandler.
 func (mr *OutboundManagerMockRecorder) AddHandler(arg0, arg1 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddHandler", reflect.TypeOf((*OutboundManager)(nil).AddHandler), arg0, arg1)
 }
 
-// Close mocks base method
+// Close mocks base method.
 func (m *OutboundManager) Close() error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Close")
@@ -56,13 +57,13 @@ func (m *OutboundManager) Close() error {
 	return ret0
 }
 
-// Close indicates an expected call of Close
+// Close indicates an expected call of Close.
 func (mr *OutboundManagerMockRecorder) Close() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Close", reflect.TypeOf((*OutboundManager)(nil).Close))
 }
 
-// GetDefaultHandler mocks base method
+// GetDefaultHandler mocks base method.
 func (m *OutboundManager) GetDefaultHandler() outbound.Handler {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "GetDefaultHandler")
@@ -70,13 +71,13 @@ func (m *OutboundManager) GetDefaultHandler() outbound.Handler {
 	return ret0
 }
 
-// GetDefaultHandler indicates an expected call of GetDefaultHandler
+// GetDefaultHandler indicates an expected call of GetDefaultHandler.
 func (mr *OutboundManagerMockRecorder) GetDefaultHandler() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetDefaultHandler", reflect.TypeOf((*OutboundManager)(nil).GetDefaultHandler))
 }
 
-// GetHandler mocks base method
+// GetHandler mocks base method.
 func (m *OutboundManager) GetHandler(arg0 string) outbound.Handler {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "GetHandler", arg0)
@@ -84,13 +85,13 @@ func (m *OutboundManager) GetHandler(arg0 string) outbound.Handler {
 	return ret0
 }
 
-// GetHandler indicates an expected call of GetHandler
+// GetHandler indicates an expected call of GetHandler.
 func (mr *OutboundManagerMockRecorder) GetHandler(arg0 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetHandler", reflect.TypeOf((*OutboundManager)(nil).GetHandler), arg0)
 }
 
-// RemoveHandler mocks base method
+// RemoveHandler mocks base method.
 func (m *OutboundManager) RemoveHandler(arg0 context.Context, arg1 string) error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "RemoveHandler", arg0, arg1)
@@ -98,13 +99,13 @@ func (m *OutboundManager) RemoveHandler(arg0 context.Context, arg1 string) error
 	return ret0
 }
 
-// RemoveHandler indicates an expected call of RemoveHandler
+// RemoveHandler indicates an expected call of RemoveHandler.
 func (mr *OutboundManagerMockRecorder) RemoveHandler(arg0, arg1 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "RemoveHandler", reflect.TypeOf((*OutboundManager)(nil).RemoveHandler), arg0, arg1)
 }
 
-// Start mocks base method
+// Start mocks base method.
 func (m *OutboundManager) Start() error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Start")
@@ -112,13 +113,13 @@ func (m *OutboundManager) Start() error {
 	return ret0
 }
 
-// Start indicates an expected call of Start
+// Start indicates an expected call of Start.
 func (mr *OutboundManagerMockRecorder) Start() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Start", reflect.TypeOf((*OutboundManager)(nil).Start))
 }
 
-// Type mocks base method
+// Type mocks base method.
 func (m *OutboundManager) Type() interface{} {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Type")
@@ -126,36 +127,36 @@ func (m *OutboundManager) Type() interface{} {
 	return ret0
 }
 
-// Type indicates an expected call of Type
+// Type indicates an expected call of Type.
 func (mr *OutboundManagerMockRecorder) Type() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Type", reflect.TypeOf((*OutboundManager)(nil).Type))
 }
 
-// OutboundHandlerSelector is a mock of HandlerSelector interface
+// OutboundHandlerSelector is a mock of HandlerSelector interface.
 type OutboundHandlerSelector struct {
 	ctrl     *gomock.Controller
 	recorder *OutboundHandlerSelectorMockRecorder
 }
 
-// OutboundHandlerSelectorMockRecorder is the mock recorder for OutboundHandlerSelector
+// OutboundHandlerSelectorMockRecorder is the mock recorder for OutboundHandlerSelector.
 type OutboundHandlerSelectorMockRecorder struct {
 	mock *OutboundHandlerSelector
 }
 
-// NewOutboundHandlerSelector creates a new mock instance
+// NewOutboundHandlerSelector creates a new mock instance.
 func NewOutboundHandlerSelector(ctrl *gomock.Controller) *OutboundHandlerSelector {
 	mock := &OutboundHandlerSelector{ctrl: ctrl}
 	mock.recorder = &OutboundHandlerSelectorMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *OutboundHandlerSelector) EXPECT() *OutboundHandlerSelectorMockRecorder {
 	return m.recorder
 }
 
-// Select mocks base method
+// Select mocks base method.
 func (m *OutboundHandlerSelector) Select(arg0 []string) []string {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Select", arg0)
@@ -163,7 +164,7 @@ func (m *OutboundHandlerSelector) Select(arg0 []string) []string {
 	return ret0
 }
 
-// Select indicates an expected call of Select
+// Select indicates an expected call of Select.
 func (mr *OutboundHandlerSelectorMockRecorder) Select(arg0 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Select", reflect.TypeOf((*OutboundHandlerSelector)(nil).Select), arg0)

testing/mocks/proxy.go

@@ -6,38 +6,39 @@ package mocks
 
 import (
 	context "context"
+	reflect "reflect"
+
 	gomock "github.com/golang/mock/gomock"
 	net "github.com/xtls/xray-core/common/net"
 	routing "github.com/xtls/xray-core/features/routing"
 	transport "github.com/xtls/xray-core/transport"
 	internet "github.com/xtls/xray-core/transport/internet"
-	reflect "reflect"
 )
 
-// ProxyInbound is a mock of Inbound interface
+// ProxyInbound is a mock of Inbound interface.
 type ProxyInbound struct {
 	ctrl     *gomock.Controller
 	recorder *ProxyInboundMockRecorder
 }
 
-// ProxyInboundMockRecorder is the mock recorder for ProxyInbound
+// ProxyInboundMockRecorder is the mock recorder for ProxyInbound.
 type ProxyInboundMockRecorder struct {
 	mock *ProxyInbound
 }
 
-// NewProxyInbound creates a new mock instance
+// NewProxyInbound creates a new mock instance.
 func NewProxyInbound(ctrl *gomock.Controller) *ProxyInbound {
 	mock := &ProxyInbound{ctrl: ctrl}
 	mock.recorder = &ProxyInboundMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *ProxyInbound) EXPECT() *ProxyInboundMockRecorder {
 	return m.recorder
 }
 
-// Network mocks base method
+// Network mocks base method.
 func (m *ProxyInbound) Network() []net.Network {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Network")
@@ -45,13 +46,13 @@ func (m *ProxyInbound) Network() []net.Network {
 	return ret0
 }
 
-// Network indicates an expected call of Network
+// Network indicates an expected call of Network.
 func (mr *ProxyInboundMockRecorder) Network() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Network", reflect.TypeOf((*ProxyInbound)(nil).Network))
 }
 
-// Process mocks base method
+// Process mocks base method.
 func (m *ProxyInbound) Process(arg0 context.Context, arg1 net.Network, arg2 internet.Connection, arg3 routing.Dispatcher) error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Process", arg0, arg1, arg2, arg3)
@@ -59,36 +60,36 @@ func (m *ProxyInbound) Process(arg0 context.Context, arg1 net.Network, arg2 inte
 	return ret0
 }
 
-// Process indicates an expected call of Process
+// Process indicates an expected call of Process.
 func (mr *ProxyInboundMockRecorder) Process(arg0, arg1, arg2, arg3 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Process", reflect.TypeOf((*ProxyInbound)(nil).Process), arg0, arg1, arg2, arg3)
 }
 
-// ProxyOutbound is a mock of Outbound interface
+// ProxyOutbound is a mock of Outbound interface.
 type ProxyOutbound struct {
 	ctrl     *gomock.Controller
 	recorder *ProxyOutboundMockRecorder
 }
 
-// ProxyOutboundMockRecorder is the mock recorder for ProxyOutbound
+// ProxyOutboundMockRecorder is the mock recorder for ProxyOutbound.
 type ProxyOutboundMockRecorder struct {
 	mock *ProxyOutbound
 }
 
-// NewProxyOutbound creates a new mock instance
+// NewProxyOutbound creates a new mock instance.
 func NewProxyOutbound(ctrl *gomock.Controller) *ProxyOutbound {
 	mock := &ProxyOutbound{ctrl: ctrl}
 	mock.recorder = &ProxyOutboundMockRecorder{mock}
 	return mock
 }
 
-// EXPECT returns an object that allows the caller to indicate expected use
+// EXPECT returns an object that allows the caller to indicate expected use.
 func (m *ProxyOutbound) EXPECT() *ProxyOutboundMockRecorder {
 	return m.recorder
 }
 
-// Process mocks base method
+// Process mocks base method.
 func (m *ProxyOutbound) Process(arg0 context.Context, arg1 *transport.Link, arg2 internet.Dialer) error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Process", arg0, arg1, arg2)
@@ -96,7 +97,7 @@ func (m *ProxyOutbound) Process(arg0 context.Context, arg1 *transport.Link, arg2
 	return ret0
 }
 
-// Process indicates an expected call of Process
+// Process indicates an expected call of Process.
 func (mr *ProxyOutboundMockRecorder) Process(arg0, arg1, arg2 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Process", reflect.TypeOf((*ProxyOutbound)(nil).Process), arg0, arg1, arg2)

transport/internet/dialer.go

@@ -3,15 +3,8 @@ package internet
 import (
 	"context"
 
-	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/common/net/cnc"
 	"github.com/xtls/xray-core/common/session"
-	"github.com/xtls/xray-core/features/dns"
-	"github.com/xtls/xray-core/features/outbound"
-	"github.com/xtls/xray-core/transport"
-	"github.com/xtls/xray-core/transport/pipe"
 )
 
 // Dialer is the interface for dialing outbound connections.
@@ -69,99 +62,11 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *MemoryStrea
 	return nil, newError("unknown network ", dest.Network)
 }
 
-var (
-	dnsClient dns.Client
-	obm       outbound.Manager
-)
-
-func lookupIP(domain string, strategy DomainStrategy, localAddr net.Address) ([]net.IP, error) {
-	if dnsClient == nil {
-		return nil, nil
-	}
-
-	var option = dns.IPOption{
-		IPv4Enable: true,
-		IPv6Enable: true,
-		FakeEnable: false,
-	}
-
-	switch {
-	case strategy == DomainStrategy_USE_IP4 || (localAddr != nil && localAddr.Family().IsIPv4()):
-		option = dns.IPOption{
-			IPv4Enable: true,
-			IPv6Enable: false,
-			FakeEnable: false,
-		}
-	case strategy == DomainStrategy_USE_IP6 || (localAddr != nil && localAddr.Family().IsIPv6()):
-		option = dns.IPOption{
-			IPv4Enable: false,
-			IPv6Enable: true,
-			FakeEnable: false,
-		}
-	case strategy == DomainStrategy_AS_IS:
-		return nil, nil
-	}
-
-	return dnsClient.LookupIP(domain, option)
-}
-
-func canLookupIP(ctx context.Context, dst net.Destination, sockopt *SocketConfig) bool {
-	if dst.Address.Family().IsIP() || dnsClient == nil {
-		return false
-	}
-	return sockopt.DomainStrategy != DomainStrategy_AS_IS
-}
-
-func redirect(ctx context.Context, dst net.Destination, obt string) net.Conn {
-	newError("redirecting request " + dst.String() + " to " + obt).WriteToLog(session.ExportIDToError(ctx))
-	h := obm.GetHandler(obt)
-	ctx = session.ContextWithOutbound(ctx, &session.Outbound{dst, nil})
-	if h != nil {
-		ur, uw := pipe.New(pipe.OptionsFromContext(ctx)...)
-		dr, dw := pipe.New(pipe.OptionsFromContext(ctx)...)
-
-		go h.Dispatch(ctx, &transport.Link{ur, dw})
-		nc := cnc.NewConnection(
-			cnc.ConnectionInputMulti(uw),
-			cnc.ConnectionOutputMulti(dr),
-			cnc.ConnectionOnClose(common.ChainedClosable{uw, dw}),
-		)
-		return nc
-	}
-	return nil
-}
-
 // DialSystem calls system dialer to create a network connection.
 func DialSystem(ctx context.Context, dest net.Destination, sockopt *SocketConfig) (net.Conn, error) {
 	var src net.Address
 	if outbound := session.OutboundFromContext(ctx); outbound != nil {
 		src = outbound.Gateway
 	}
-	if sockopt == nil {
 	return effectiveSystemDialer.Dial(ctx, src, dest, sockopt)
 }
-
-	if canLookupIP(ctx, dest, sockopt) {
-		ips, err := lookupIP(dest.Address.String(), sockopt.DomainStrategy, src)
-		if err == nil && len(ips) > 0 {
-			dest.Address = net.IPAddress(ips[dice.Roll(len(ips))])
-			newError("replace destination with " + dest.String()).AtInfo().WriteToLog()
-		} else if err != nil {
-			newError("failed to resolve ip").Base(err).AtWarning().WriteToLog()
-		}
-	}
-
-	if obm != nil && len(sockopt.DialerProxy) > 0 {
-		nc := redirect(ctx, dest, sockopt.DialerProxy)
-		if nc != nil {
-			return nc, nil
-		}
-	}
-
-	return effectiveSystemDialer.Dial(ctx, src, dest, sockopt)
-}
-
-func InitSystemDialer(dc dns.Client, om outbound.Manager) {
-	dnsClient = dc
-	obm = om
-}

transport/internet/grpc/config.go

@@ -1,8 +1,6 @@
 package grpc
 
 import (
-	"net/url"
-
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/transport/internet"
 )
@@ -14,7 +12,3 @@ func init() {
 		return new(Config)
 	}))
 }
-
-func (c *Config) getNormalizedName() string {
-	return url.PathEscape(c.ServiceName)
-}

transport/internet/grpc/config.pb.go

@@ -1,12 +1,13 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
+// 	protoc-gen-go v1.25.0
-// 	protoc        v3.17.3
+// 	protoc        v3.15.6
 // source: transport/internet/grpc/config.proto
 
 package grpc
 
 import (
+	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -20,6 +21,10 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -28,9 +33,6 @@ type Config struct {
 	Host        string `protobuf:"bytes,1,opt,name=host,proto3" json:"host,omitempty"`
 	ServiceName string `protobuf:"bytes,2,opt,name=service_name,json=serviceName,proto3" json:"service_name,omitempty"`
 	MultiMode   bool   `protobuf:"varint,3,opt,name=multi_mode,json=multiMode,proto3" json:"multi_mode,omitempty"`
-	IdleTimeout         int32  `protobuf:"varint,4,opt,name=idle_timeout,json=idleTimeout,proto3" json:"idle_timeout,omitempty"`
-	HealthCheckTimeout  int32  `protobuf:"varint,5,opt,name=health_check_timeout,json=healthCheckTimeout,proto3" json:"health_check_timeout,omitempty"`
-	PermitWithoutStream bool   `protobuf:"varint,6,opt,name=permit_without_stream,json=permitWithoutStream,proto3" json:"permit_without_stream,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -86,27 +88,6 @@ func (x *Config) GetMultiMode() bool {
 	return false
 }
 
-func (x *Config) GetIdleTimeout() int32 {
-	if x != nil {
-		return x.IdleTimeout
-	}
-	return 0
-}
-
-func (x *Config) GetHealthCheckTimeout() int32 {
-	if x != nil {
-		return x.HealthCheckTimeout
-	}
-	return 0
-}
-
-func (x *Config) GetPermitWithoutStream() bool {
-	if x != nil {
-		return x.PermitWithoutStream
-	}
-	return false
-}
-
 var File_transport_internet_grpc_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_grpc_config_proto_rawDesc = []byte{
@@ -114,26 +95,17 @@ var file_transport_internet_grpc_config_proto_rawDesc = []byte{
 	0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
 	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x25, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61,
 	0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e,
-	0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x22, 0xe7, 0x01,
+	0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x22, 0x5e, 0x0a,
-	0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a, 0x04, 0x68, 0x6f, 0x73, 0x74,
+	0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x18,
-	0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x12, 0x21, 0x0a, 0x0c,
+	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x12, 0x21, 0x0a, 0x0c, 0x73,
-	0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01,
+	0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28,
-	0x28, 0x09, 0x52, 0x0b, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x4e, 0x61, 0x6d, 0x65, 0x12,
+	0x09, 0x52, 0x0b, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x4e, 0x61, 0x6d, 0x65, 0x12, 0x1d,
-	0x1d, 0x0a, 0x0a, 0x6d, 0x75, 0x6c, 0x74, 0x69, 0x5f, 0x6d, 0x6f, 0x64, 0x65, 0x18, 0x03, 0x20,
+	0x0a, 0x0a, 0x6d, 0x75, 0x6c, 0x74, 0x69, 0x5f, 0x6d, 0x6f, 0x64, 0x65, 0x18, 0x03, 0x20, 0x01,
-	0x01, 0x28, 0x08, 0x52, 0x09, 0x6d, 0x75, 0x6c, 0x74, 0x69, 0x4d, 0x6f, 0x64, 0x65, 0x12, 0x21,
+	0x28, 0x08, 0x52, 0x09, 0x6d, 0x75, 0x6c, 0x74, 0x69, 0x4d, 0x6f, 0x64, 0x65, 0x42, 0x33, 0x5a,
-	0x0a, 0x0c, 0x69, 0x64, 0x6c, 0x65, 0x5f, 0x74, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x18, 0x04,
+	0x31, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73,
-	0x20, 0x01, 0x28, 0x05, 0x52, 0x0b, 0x69, 0x64, 0x6c, 0x65, 0x54, 0x69, 0x6d, 0x65, 0x6f, 0x75,
+	0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73,
-	0x74, 0x12, 0x30, 0x0a, 0x14, 0x68, 0x65, 0x61, 0x6c, 0x74, 0x68, 0x5f, 0x63, 0x68, 0x65, 0x63,
+	0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72,
-	0x6b, 0x5f, 0x74, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x18, 0x05, 0x20, 0x01, 0x28, 0x05, 0x52,
+	0x70, 0x63, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
-	0x12, 0x68, 0x65, 0x61, 0x6c, 0x74, 0x68, 0x43, 0x68, 0x65, 0x63, 0x6b, 0x54, 0x69, 0x6d, 0x65,
-	0x6f, 0x75, 0x74, 0x12, 0x32, 0x0a, 0x15, 0x70, 0x65, 0x72, 0x6d, 0x69, 0x74, 0x5f, 0x77, 0x69,
-	0x74, 0x68, 0x6f, 0x75, 0x74, 0x5f, 0x73, 0x74, 0x72, 0x65, 0x61, 0x6d, 0x18, 0x06, 0x20, 0x01,
-	0x28, 0x08, 0x52, 0x13, 0x70, 0x65, 0x72, 0x6d, 0x69, 0x74, 0x57, 0x69, 0x74, 0x68, 0x6f, 0x75,
-	0x74, 0x53, 0x74, 0x72, 0x65, 0x61, 0x6d, 0x42, 0x33, 0x5a, 0x31, 0x67, 0x69, 0x74, 0x68, 0x75,
-	0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d,
-	0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69,
-	0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x62, 0x06, 0x70, 0x72,
-	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

transport/internet/grpc/config.proto

@@ -7,7 +7,4 @@ message Config {
   string host = 1;
   string service_name = 2;
   bool multi_mode = 3;
-  int32 idle_timeout = 4;
-  int32 health_check_timeout = 5;
-  bool permit_without_stream = 6;
 }

transport/internet/grpc/dial.go

@@ -10,7 +10,6 @@ import (
 	"google.golang.org/grpc/backoff"
 	"google.golang.org/grpc/connectivity"
 	"google.golang.org/grpc/credentials"
-	"google.golang.org/grpc/keepalive"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
@@ -36,7 +35,8 @@ func init() {
 
 type dialerConf struct {
 	net.Destination
-	*internet.MemoryStreamConfig
+	*internet.SocketConfig
+	*tls.Config
 }
 
 var (
@@ -47,7 +47,9 @@ var (
 func dialgRPC(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (net.Conn, error) {
 	grpcSettings := streamSettings.ProtocolSettings.(*Config)
 
-	conn, err := getGrpcClient(ctx, dest, streamSettings)
+	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
+
+	conn, err := getGrpcClient(ctx, dest, tlsConfig, streamSettings.SocketSettings)
 
 	if err != nil {
 		return nil, newError("Cannot dial gRPC").Base(err)
@@ -55,14 +57,14 @@ func dialgRPC(ctx context.Context, dest net.Destination, streamSettings *interne
 	client := encoding.NewGRPCServiceClient(conn)
 	if grpcSettings.MultiMode {
 		newError("using gRPC multi mode").AtDebug().WriteToLog()
-		grpcService, err := client.(encoding.GRPCServiceClientX).TunMultiCustomName(ctx, grpcSettings.getNormalizedName())
+		grpcService, err := client.(encoding.GRPCServiceClientX).TunMultiCustomName(ctx, grpcSettings.ServiceName)
 		if err != nil {
 			return nil, newError("Cannot dial gRPC").Base(err)
 		}
 		return encoding.NewMultiHunkConn(grpcService, nil), nil
 	}
 
-	grpcService, err := client.(encoding.GRPCServiceClientX).TunCustomName(ctx, grpcSettings.getNormalizedName())
+	grpcService, err := client.(encoding.GRPCServiceClientX).TunCustomName(ctx, grpcSettings.ServiceName)
 	if err != nil {
 		return nil, newError("Cannot dial gRPC").Base(err)
 	}
@@ -70,22 +72,33 @@ func dialgRPC(ctx context.Context, dest net.Destination, streamSettings *interne
 	return encoding.NewHunkConn(grpcService, nil), nil
 }
 
-func getGrpcClient(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (*grpc.ClientConn, error) {
+func getGrpcClient(ctx context.Context, dest net.Destination, tlsConfig *tls.Config, sockopt *internet.SocketConfig) (*grpc.ClientConn, error) {
 	globalDialerAccess.Lock()
 	defer globalDialerAccess.Unlock()
 
 	if globalDialerMap == nil {
 		globalDialerMap = make(map[dialerConf]*grpc.ClientConn)
 	}
-	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
-	sockopt := streamSettings.SocketSettings
-	grpcSettings := streamSettings.ProtocolSettings.(*Config)
 
-	if client, found := globalDialerMap[dialerConf{dest, streamSettings}]; found && client.GetState() != connectivity.Shutdown {
+	if client, found := globalDialerMap[dialerConf{dest, sockopt, tlsConfig}]; found && client.GetState() != connectivity.Shutdown {
 		return client, nil
 	}
 
-	var dialOptions = []grpc.DialOption{
+	dialOption := grpc.WithInsecure()
+
+	if tlsConfig != nil {
+		dialOption = grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig.GetTLSConfig()))
+	}
+
+	var grpcDestHost string
+	if dest.Address.Family().IsDomain() {
+		grpcDestHost = dest.Address.Domain()
+	} else {
+		grpcDestHost = dest.Address.IP().String()
+	}
+	conn, err := grpc.Dial(
+		gonet.JoinHostPort(grpcDestHost, dest.Port.String()),
+		dialOption,
 		grpc.WithConnectParams(grpc.ConnectParams{
 			Backoff: backoff.Config{
 				BaseDelay:  500 * time.Millisecond,
@@ -119,33 +132,7 @@ func getGrpcClient(ctx context.Context, dest net.Destination, streamSettings *in
 			address := net.ParseAddress(rawHost)
 			return internet.DialSystem(gctx, net.TCPDestination(address, port), sockopt)
 		}),
-	}
-
-	if tlsConfig != nil {
-		dialOptions = append(dialOptions, grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig.GetTLSConfig())))
-	} else {
-		dialOptions = append(dialOptions, grpc.WithInsecure())
-	}
-
-	if grpcSettings.IdleTimeout > 0 || grpcSettings.HealthCheckTimeout > 0 || grpcSettings.PermitWithoutStream {
-		dialOptions = append(dialOptions, grpc.WithKeepaliveParams(keepalive.ClientParameters{
-			Time:                time.Second * time.Duration(grpcSettings.IdleTimeout),
-			Timeout:             time.Second * time.Duration(grpcSettings.HealthCheckTimeout),
-			PermitWithoutStream: grpcSettings.PermitWithoutStream,
-		}))
-	}
-
-	var grpcDestHost string
-	if dest.Address.Family().IsDomain() {
-		grpcDestHost = dest.Address.Domain()
-	} else {
-		grpcDestHost = dest.Address.IP().String()
-	}
-
-	conn, err := grpc.Dial(
-		gonet.JoinHostPort(grpcDestHost, dest.Port.String()),
-		dialOptions...,
 	)
-	globalDialerMap[dialerConf{dest, streamSettings}] = conn
+	globalDialerMap[dialerConf{dest, sockopt, tlsConfig}] = conn
 	return conn, err
 }

transport/internet/grpc/encoding/customSeviceName.go

@@ -39,7 +39,7 @@ func (c *gRPCServiceClient) TunCustomName(ctx context.Context, name string, opts
 }
 
 func (c *gRPCServiceClient) TunMultiCustomName(ctx context.Context, name string, opts ...grpc.CallOption) (GRPCService_TunMultiClient, error) {
-	stream, err := c.cc.NewStream(ctx, &ServerDesc(name).Streams[1], "/"+name+"/TunMulti", opts...)
+	stream, err := c.cc.NewStream(ctx, &ServerDesc(name).Streams[0], "/"+name+"/TunMulti", opts...)
 	if err != nil {
 		return nil, err
 	}

transport/internet/grpc/hub.go

@@ -2,11 +2,9 @@ package grpc
 
 import (
 	"context"
-	"time"
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
-	"google.golang.org/grpc/keepalive"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
@@ -77,19 +75,12 @@ func Listen(ctx context.Context, address net.Address, port net.Port, settings *i
 
 	config := tls.ConfigFromStreamSettings(settings)
 
-	var options []grpc.ServerOption
 	var s *grpc.Server
-	if config != nil {
+	if config == nil {
-		options = append(options, grpc.Creds(credentials.NewTLS(config.GetTLSConfig(tls.WithNextProto("h2")))))
+		s = grpc.NewServer()
+	} else {
+		s = grpc.NewServer(grpc.Creds(credentials.NewTLS(config.GetTLSConfig(tls.WithNextProto("h2")))))
 	}
-	if grpcSettings.IdleTimeout > 0 || grpcSettings.HealthCheckTimeout > 0 {
-		options = append(options, grpc.KeepaliveParams(keepalive.ServerParameters{
-			Time:    time.Second * time.Duration(grpcSettings.IdleTimeout),
-			Timeout: time.Second * time.Duration(grpcSettings.HealthCheckTimeout),
-		}))
-	}
-
-	s = grpc.NewServer(options...)
 	listener.s = s
 
 	if settings.SocketSettings != nil && settings.SocketSettings.AcceptProxyProtocol {
@@ -123,7 +114,7 @@ func Listen(ctx context.Context, address net.Address, port net.Port, settings *i
 			}
 		}
 
-		encoding.RegisterGRPCServiceServerX(s, listener, grpcSettings.getNormalizedName())
+		encoding.RegisterGRPCServiceServerX(s, listener, grpcSettings.ServiceName)
 
 		if err = s.Serve(streamListener); err != nil {
 			newError("Listener for gRPC ended").Base(err).WriteToLog()

transport/internet/headers/http/http.go

@@ -90,7 +90,7 @@ func (h *HeaderReader) Read(reader io.Reader) (*buf.Buffer, error) {
 			buffer.Clear()
 			copy(buffer.Extend(lenEnding), leftover)
 
-			if _, err := readRequest(bufio.NewReader(bytes.NewReader(headerBuf.Bytes()))); err != io.ErrUnexpectedEOF {
+			if _, err := readRequest(bufio.NewReader(bytes.NewReader(headerBuf.Bytes())), false); err != io.ErrUnexpectedEOF {
 				return nil, err
 			}
 		}
@@ -110,7 +110,7 @@ func (h *HeaderReader) Read(reader io.Reader) (*buf.Buffer, error) {
 	}
 
 	// Parse the request
-	if req, err := readRequest(bufio.NewReader(bytes.NewReader(headerBuf.Bytes()))); err != nil {
+	if req, err := readRequest(bufio.NewReader(bytes.NewReader(headerBuf.Bytes())), false); err != nil {
 		return nil, err
 	} else {
 		h.req = req

transport/internet/headers/http/linkedreadRequest.go

@@ -8,4 +8,4 @@ import (
 )
 
 //go:linkname readRequest net/http.readRequest
-func readRequest(b *bufio.Reader) (req *http.Request, err error)
+func readRequest(b *bufio.Reader, deleteHostHeader bool) (req *http.Request, err error)

transport/internet/http/config.pb.go

@@ -1,12 +1,13 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
+// 	protoc-gen-go v1.25.0
-// 	protoc        v3.17.3
+// 	protoc        v3.14.0
 // source: transport/internet/http/config.proto
 
 package http
 
 import (
+	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -20,6 +21,10 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -27,8 +32,6 @@ type Config struct {
 
 	Host []string `protobuf:"bytes,1,rep,name=host,proto3" json:"host,omitempty"`
 	Path string   `protobuf:"bytes,2,opt,name=path,proto3" json:"path,omitempty"`
-	IdleTimeout        int32    `protobuf:"varint,3,opt,name=idle_timeout,json=idleTimeout,proto3" json:"idle_timeout,omitempty"`
-	HealthCheckTimeout int32    `protobuf:"varint,4,opt,name=health_check_timeout,json=healthCheckTimeout,proto3" json:"health_check_timeout,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -77,20 +80,6 @@ func (x *Config) GetPath() string {
 	return ""
 }
 
-func (x *Config) GetIdleTimeout() int32 {
-	if x != nil {
-		return x.IdleTimeout
-	}
-	return 0
-}
-
-func (x *Config) GetHealthCheckTimeout() int32 {
-	if x != nil {
-		return x.HealthCheckTimeout
-	}
-	return 0
-}
-
 var File_transport_internet_http_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_http_config_proto_rawDesc = []byte{
@@ -98,23 +87,18 @@ var file_transport_internet_http_config_proto_rawDesc = []byte{
 	0x72, 0x6e, 0x65, 0x74, 0x2f, 0x68, 0x74, 0x74, 0x70, 0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
 	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x1c, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61,
 	0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e,
-	0x68, 0x74, 0x74, 0x70, 0x22, 0x85, 0x01, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12,
+	0x68, 0x74, 0x74, 0x70, 0x22, 0x30, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12,
-	0x12, 0x0a, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x18, 0x01, 0x20, 0x03, 0x28, 0x09, 0x52, 0x04, 0x68,
+	0x0a, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x18, 0x01, 0x20, 0x03, 0x28, 0x09, 0x52, 0x04, 0x68, 0x6f,
-	0x6f, 0x73, 0x74, 0x12, 0x12, 0x0a, 0x04, 0x70, 0x61, 0x74, 0x68, 0x18, 0x02, 0x20, 0x01, 0x28,
+	0x73, 0x74, 0x12, 0x12, 0x0a, 0x04, 0x70, 0x61, 0x74, 0x68, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09,
-	0x09, 0x52, 0x04, 0x70, 0x61, 0x74, 0x68, 0x12, 0x21, 0x0a, 0x0c, 0x69, 0x64, 0x6c, 0x65, 0x5f,
+	0x52, 0x04, 0x70, 0x61, 0x74, 0x68, 0x42, 0x76, 0x0a, 0x20, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72,
-	0x74, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x18, 0x03, 0x20, 0x01, 0x28, 0x05, 0x52, 0x0b, 0x69,
+	0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74,
-	0x64, 0x6c, 0x65, 0x54, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x12, 0x30, 0x0a, 0x14, 0x68, 0x65,
+	0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x68, 0x74, 0x74, 0x70, 0x50, 0x01, 0x5a, 0x31, 0x67, 0x69,
-	0x61, 0x6c, 0x74, 0x68, 0x5f, 0x63, 0x68, 0x65, 0x63, 0x6b, 0x5f, 0x74, 0x69, 0x6d, 0x65, 0x6f,
+	0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72,
-	0x75, 0x74, 0x18, 0x04, 0x20, 0x01, 0x28, 0x05, 0x52, 0x12, 0x68, 0x65, 0x61, 0x6c, 0x74, 0x68,
+	0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72,
-	0x43, 0x68, 0x65, 0x63, 0x6b, 0x54, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x42, 0x76, 0x0a, 0x20,
+	0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x68, 0x74, 0x74, 0x70, 0xaa,
-	0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f,
+	0x02, 0x1c, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74,
-	0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x68, 0x74, 0x74, 0x70,
+	0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x48, 0x74, 0x74, 0x70, 0x62, 0x06,
-	0x50, 0x01, 0x5a, 0x31, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
-	0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72,
-	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74,
-	0x2f, 0x68, 0x74, 0x74, 0x70, 0xaa, 0x02, 0x1c, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61,
-	0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e,
-	0x48, 0x74, 0x74, 0x70, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

transport/internet/http/config.proto

@@ -9,6 +9,4 @@ option java_multiple_files = true;
 message Config {
   repeated string host = 1;
   string path = 2;
-  int32 idle_timeout = 3;
-  int32 health_check_timeout = 4;
 }

transport/internet/http/dialer.go

@@ -6,7 +6,6 @@ import (
 	"net/http"
 	"net/url"
 	"sync"
-	"time"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
@@ -21,7 +20,8 @@ import (
 
 type dialerConf struct {
 	net.Destination
-	*internet.MemoryStreamConfig
+	*internet.SocketConfig
+	*tls.Config
 }
 
 var (
@@ -29,7 +29,7 @@ var (
 	globalDialerAccess sync.Mutex
 )
 
-func getHTTPClient(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (*http.Client, error) {
+func getHTTPClient(ctx context.Context, dest net.Destination, tlsSettings *tls.Config, sockopt *internet.SocketConfig) (*http.Client, error) {
 	globalDialerAccess.Lock()
 	defer globalDialerAccess.Unlock()
 
@@ -37,14 +37,7 @@ func getHTTPClient(ctx context.Context, dest net.Destination, streamSettings *in
 		globalDialerMap = make(map[dialerConf]*http.Client)
 	}
 
-	httpSettings := streamSettings.ProtocolSettings.(*Config)
+	if client, found := globalDialerMap[dialerConf{dest, sockopt, tlsSettings}]; found {
-	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
-	if tlsConfig == nil {
-		return nil, newError("TLS must be enabled for http transport.").AtWarning()
-	}
-	sockopt := streamSettings.SocketSettings
-
-	if client, found := globalDialerMap[dialerConf{dest, streamSettings}]; found {
 		return client, nil
 	}
 
@@ -93,26 +86,25 @@ func getHTTPClient(ctx context.Context, dest net.Destination, streamSettings *in
 			}
 			return cn, nil
 		},
-		TLSClientConfig: tlsConfig.GetTLSConfig(tls.WithDestination(dest)),
+		TLSClientConfig: tlsSettings.GetTLSConfig(tls.WithDestination(dest)),
-	}
-
-	if httpSettings.IdleTimeout > 0 || httpSettings.HealthCheckTimeout > 0 {
-		transport.ReadIdleTimeout = time.Second * time.Duration(httpSettings.IdleTimeout)
-		transport.PingTimeout = time.Second * time.Duration(httpSettings.HealthCheckTimeout)
 	}
 
 	client := &http.Client{
 		Transport: transport,
 	}
 
-	globalDialerMap[dialerConf{dest, streamSettings}] = client
+	globalDialerMap[dialerConf{dest, sockopt, tlsSettings}] = client
 	return client, nil
 }
 
 // Dial dials a new TCP connection to the given destination.
 func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
 	httpSettings := streamSettings.ProtocolSettings.(*Config)
-	client, err := getHTTPClient(ctx, dest, streamSettings)
+	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
+	if tlsConfig == nil {
+		return nil, newError("TLS must be enabled for http transport.").AtWarning()
+	}
+	client, err := getHTTPClient(ctx, dest, tlsConfig, streamSettings.SocketSettings)
 	if err != nil {
 		return nil, err
 	}

transport/internet/system_dialer.go

@@ -5,18 +5,29 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/net/cnc"
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/outbound"
+	"github.com/xtls/xray-core/transport"
+	"github.com/xtls/xray-core/transport/pipe"
 )
 
 var (
 	effectiveSystemDialer SystemDialer = &DefaultSystemDialer{}
 )
 
+// InitSystemDialer: It's private method and you are NOT supposed to use this function.
+func InitSystemDialer(dc dns.Client, om outbound.Manager) {
+	effectiveSystemDialer.Init(dc, om)
+}
+
 type SystemDialer interface {
 	Dial(ctx context.Context, source net.Address, destination net.Destination, sockopt *SocketConfig) (net.Conn, error)
+	Init(dc dns.Client, om outbound.Manager)
 }
 
 type DefaultSystemDialer struct {
@@ -47,8 +58,68 @@ func hasBindAddr(sockopt *SocketConfig) bool {
 	return sockopt != nil && len(sockopt.BindAddress) > 0 && sockopt.BindPort > 0
 }
 
+func (d *DefaultSystemDialer) lookupIP(domain string, strategy DomainStrategy, localAddr net.Address) ([]net.IP, error) {
+	if d.dns == nil {
+		return nil, nil
+	}
+
+	var opt dns.Option
+	switch {
+	case strategy == DomainStrategy_USE_IP4 || (localAddr != nil && localAddr.Family().IsIPv4()):
+		opt = dns.LookupIPv4Only
+	case strategy == DomainStrategy_USE_IP6 || (localAddr != nil && localAddr.Family().IsIPv6()):
+		opt = dns.LookupIPv6Only
+	case strategy == DomainStrategy_AS_IS:
+		return nil, nil
+	}
+
+	return d.dns.LookupOptions(domain, opt, dns.LookupNoFake)
+}
+
+func (d *DefaultSystemDialer) canLookupIP(ctx context.Context, dst net.Destination, sockopt *SocketConfig) bool {
+	if sockopt == nil || dst.Address.Family().IsIP() || d.dns == nil {
+		return false
+	}
+	return sockopt.DomainStrategy != DomainStrategy_AS_IS
+}
+
+func (d *DefaultSystemDialer) redirect(ctx context.Context, dst net.Destination, obt string) net.Conn {
+	newError("redirecting request " + dst.String() + " to " + obt).WriteToLog(session.ExportIDToError(ctx))
+	h := d.obm.GetHandler(obt)
+	ctx = session.ContextWithOutbound(ctx, &session.Outbound{dst, nil})
+	if h != nil {
+		ur, uw := pipe.New(pipe.OptionsFromContext(ctx)...)
+		dr, dw := pipe.New(pipe.OptionsFromContext(ctx)...)
+
+		go h.Dispatch(ctx, &transport.Link{ur, dw})
+		nc := cnc.NewConnection(
+			cnc.ConnectionInputMulti(uw),
+			cnc.ConnectionOutputMulti(dr),
+			cnc.ConnectionOnClose(common.ChainedClosable{uw, dw}),
+		)
+		return nc
+	}
+	return nil
+}
+
 func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest net.Destination, sockopt *SocketConfig) (net.Conn, error) {
 	newError("dialing to " + dest.String()).AtDebug().WriteToLog()
+	if d.obm != nil && sockopt != nil && len(sockopt.DialerProxy) > 0 {
+		nc := d.redirect(ctx, dest, sockopt.DialerProxy)
+		if nc != nil {
+			return nc, nil
+		}
+	}
+
+	if d.canLookupIP(ctx, dest, sockopt) {
+		ips, err := d.lookupIP(dest.Address.String(), sockopt.DomainStrategy, src)
+		if err == nil && len(ips) > 0 {
+			dest.Address = net.IPAddress(ips[dice.Roll(len(ips))])
+			newError("replace destination with " + dest.String()).AtInfo().WriteToLog()
+		} else if err != nil {
+			newError("failed to resolve ip").Base(err).AtWarning().WriteToLog()
+		}
+	}
 
 	if dest.Network == net.Network_UDP && !hasBindAddr(sockopt) {
 		srcAddr := resolveSrcAddr(net.Network_UDP, src)
@@ -104,6 +175,11 @@ func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest ne
 	return dialer.DialContext(ctx, dest.Network.SystemString(), dest.NetAddr())
 }
 
+func (d *DefaultSystemDialer) Init(dc dns.Client, om outbound.Manager) {
+	d.dns = dc
+	d.obm = om
+}
+
 type PacketConnWrapper struct {
 	conn net.PacketConn
 	dest net.Addr
@@ -164,6 +240,8 @@ func WithAdapter(dialer SystemDialerAdapter) SystemDialer {
 	}
 }
 
+func (v *SimpleSystemDialer) Init(_ dns.Client, _ outbound.Manager) {}
+
 func (v *SimpleSystemDialer) Dial(ctx context.Context, src net.Address, dest net.Destination, sockopt *SocketConfig) (net.Conn, error) {
 	return v.adapter.Dial(dest.Network.SystemString(), dest.NetAddr())
 }

transport/internet/tls/config.go

@@ -121,7 +121,7 @@ func isCertificateExpired(c *tls.Certificate) bool {
 	}
 
 	// If leaf is not there, the certificate is probably not used yet. We trust user to provide a valid certificate.
-	return c.Leaf != nil && c.Leaf.NotAfter.Before(time.Now().Add(time.Minute*2))
+	return c.Leaf != nil && c.Leaf.NotAfter.Before(time.Now().Add(-time.Minute))
 }
 
 func issueCertificate(rawCA *Certificate, domain string) (*tls.Certificate, error) {
@@ -173,9 +173,6 @@ func getGetCertificateFunc(c *tls.Config, ca []*Certificate) func(hello *tls.Cli
 			for _, certificate := range c.Certificates {
 				if !isCertificateExpired(&certificate) {
 					newCerts = append(newCerts, certificate)
-				} else if certificate.Leaf != nil {
-					expTime := certificate.Leaf.NotAfter.Format(time.RFC3339)
-					newError("old certificate for ", domain, " (expire on ", expTime, ") discarded").AtInfo().WriteToLog()
 				}
 			}
 
@@ -193,14 +190,6 @@ func getGetCertificateFunc(c *tls.Config, ca []*Certificate) func(hello *tls.Cli
 					newError("failed to issue new certificate for ", domain).Base(err).WriteToLog()
 					continue
 				}
-				parsed, err := x509.ParseCertificate(newCert.Certificate[0])
-				if err == nil {
-					newCert.Leaf = parsed
-					expTime := parsed.NotAfter.Format(time.RFC3339)
-					newError("new certificate for ", domain, " (expire on ", expTime, ") issued").AtInfo().WriteToLog()
-				} else {
-					newError("failed to parse new certificate for ", domain).Base(err).WriteToLog()
-				}
 
 				access.Lock()
 				c.Certificates = append(c.Certificates, *newCert)
@@ -222,13 +211,13 @@ func getGetCertificateFunc(c *tls.Config, ca []*Certificate) func(hello *tls.Cli
 	}
 }
 
-func getNewGetCertificateFunc(certs []*tls.Certificate, rejectUnknownSNI bool) func(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
+func getNewGetCertficateFunc(certs []*tls.Certificate) func(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
 	return func(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
 		if len(certs) == 0 {
-			return nil, errNoCertificates
+			return nil, newError("empty certs")
 		}
 		sni := strings.ToLower(hello.ServerName)
-		if !rejectUnknownSNI && (len(certs) == 1 || sni == "") {
+		if len(certs) == 1 || sni == "" {
 			return certs[0], nil
 		}
 		gsni := "*"
@@ -245,9 +234,6 @@ func getNewGetCertificateFunc(certs []*tls.Certificate, rejectUnknownSNI bool) f
 				}
 			}
 		}
-		if rejectUnknownSNI {
-			return nil, errNoCertificates
-		}
 		return certs[0], nil
 	}
 }
@@ -289,7 +275,7 @@ func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
 	if len(caCerts) > 0 {
 		config.GetCertificate = getGetCertificateFunc(config, caCerts)
 	} else {
-		config.GetCertificate = getNewGetCertificateFunc(c.BuildCertificates(), c.RejectUnknownSni)
+		config.GetCertificate = getNewGetCertficateFunc(c.BuildCertificates())
 	}
 
 	if sn := c.parseServerName(); len(sn) > 0 {

transport/internet/tls/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0
-// 	protoc        v3.15.8
+// 	protoc        v3.15.6
 // source: transport/internet/tls/config.proto
 
 package tls
@@ -202,7 +202,6 @@ type Config struct {
 	PreferServerCipherSuites bool `protobuf:"varint,10,opt,name=prefer_server_cipher_suites,json=preferServerCipherSuites,proto3" json:"prefer_server_cipher_suites,omitempty"`
 	// TLS Client Hello fingerprint (uTLS).
 	Fingerprint string `protobuf:"bytes,11,opt,name=fingerprint,proto3" json:"fingerprint,omitempty"`
-	RejectUnknownSni bool   `protobuf:"varint,12,opt,name=reject_unknown_sni,json=rejectUnknownSni,proto3" json:"reject_unknown_sni,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -314,13 +313,6 @@ func (x *Config) GetFingerprint() string {
 	return ""
 }
 
-func (x *Config) GetRejectUnknownSni() bool {
-	if x != nil {
-		return x.RejectUnknownSni
-	}
-	return false
-}
-
 var File_transport_internet_tls_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_tls_config_proto_rawDesc = []byte{
@@ -350,7 +342,7 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x00, 0x12, 0x14, 0x0a, 0x10,
 	0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f, 0x56, 0x45, 0x52, 0x49, 0x46, 0x59,
 	0x10, 0x01, 0x12, 0x13, 0x0a, 0x0f, 0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f,
-	0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xa3, 0x04, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
+	0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xf5, 0x03, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
 	0x69, 0x67, 0x12, 0x25, 0x0a, 0x0e, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x5f, 0x69, 0x6e, 0x73, 0x65,
 	0x63, 0x75, 0x72, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x08, 0x52, 0x0d, 0x61, 0x6c, 0x6c, 0x6f,
 	0x77, 0x49, 0x6e, 0x73, 0x65, 0x63, 0x75, 0x72, 0x65, 0x12, 0x4a, 0x0a, 0x0b, 0x63, 0x65, 0x72,
@@ -381,18 +373,15 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x01, 0x28, 0x08, 0x52, 0x18, 0x70, 0x72, 0x65, 0x66, 0x65, 0x72, 0x53, 0x65, 0x72, 0x76, 0x65,
 	0x72, 0x43, 0x69, 0x70, 0x68, 0x65, 0x72, 0x53, 0x75, 0x69, 0x74, 0x65, 0x73, 0x12, 0x20, 0x0a,
 	0x0b, 0x66, 0x69, 0x6e, 0x67, 0x65, 0x72, 0x70, 0x72, 0x69, 0x6e, 0x74, 0x18, 0x0b, 0x20, 0x01,
-	0x28, 0x09, 0x52, 0x0b, 0x66, 0x69, 0x6e, 0x67, 0x65, 0x72, 0x70, 0x72, 0x69, 0x6e, 0x74, 0x12,
+	0x28, 0x09, 0x52, 0x0b, 0x66, 0x69, 0x6e, 0x67, 0x65, 0x72, 0x70, 0x72, 0x69, 0x6e, 0x74, 0x42,
-	0x2c, 0x0a, 0x12, 0x72, 0x65, 0x6a, 0x65, 0x63, 0x74, 0x5f, 0x75, 0x6e, 0x6b, 0x6e, 0x6f, 0x77,
+	0x73, 0x0a, 0x1f, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e,
-	0x6e, 0x5f, 0x73, 0x6e, 0x69, 0x18, 0x0c, 0x20, 0x01, 0x28, 0x08, 0x52, 0x10, 0x72, 0x65, 0x6a,
+	0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x74,
-	0x65, 0x63, 0x74, 0x55, 0x6e, 0x6b, 0x6e, 0x6f, 0x77, 0x6e, 0x53, 0x6e, 0x69, 0x42, 0x73, 0x0a,
+	0x6c, 0x73, 0x50, 0x01, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d,
-	0x1f, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70,
+	0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f,
-	0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x74, 0x6c, 0x73,
+	0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e,
-	0x50, 0x01, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78,
+	0x65, 0x74, 0x2f, 0x74, 0x6c, 0x73, 0xaa, 0x02, 0x1b, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72,
-	0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72,
+	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74,
-	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74,
+	0x2e, 0x54, 0x6c, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
-	0x2f, 0x74, 0x6c, 0x73, 0xaa, 0x02, 0x1b, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e,
-	0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x54,
-	0x6c, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

transport/internet/tls/config.proto

@@ -67,6 +67,4 @@ message Config {
 
   // TLS Client Hello fingerprint (uTLS).
   string fingerprint = 11;
-
-  bool reject_unknown_sni = 12;
 }

transport/internet/tls/unsafe.go

@@ -1,6 +0,0 @@
-package tls
-
-import _ "unsafe"
-
-//go:linkname errNoCertificates crypto/tls.errNoCertificates
-var errNoCertificates error

transport/internet/xtls/config.go

@@ -212,13 +212,13 @@ func getGetCertificateFunc(c *xtls.Config, ca []*Certificate) func(hello *xtls.C
 	}
 }
 
-func getNewGetCertificateFunc(certs []*xtls.Certificate, rejectUnknownSNI bool) func(hello *xtls.ClientHelloInfo) (*xtls.Certificate, error) {
+func getNewGetCertficateFunc(certs []*xtls.Certificate) func(hello *xtls.ClientHelloInfo) (*xtls.Certificate, error) {
 	return func(hello *xtls.ClientHelloInfo) (*xtls.Certificate, error) {
 		if len(certs) == 0 {
-			return nil, errNoCertificates
+			return nil, newError("empty certs")
 		}
 		sni := strings.ToLower(hello.ServerName)
-		if !rejectUnknownSNI && (len(certs) == 1 || sni == "") {
+		if len(certs) == 1 || sni == "" {
 			return certs[0], nil
 		}
 		gsni := "*"
@@ -235,9 +235,6 @@ func getNewGetCertificateFunc(certs []*xtls.Certificate, rejectUnknownSNI bool)
 				}
 			}
 		}
-		if rejectUnknownSNI {
-			return nil, errNoCertificates
-		}
 		return certs[0], nil
 	}
 }
@@ -279,7 +276,7 @@ func (c *Config) GetXTLSConfig(opts ...Option) *xtls.Config {
 	if len(caCerts) > 0 {
 		config.GetCertificate = getGetCertificateFunc(config, caCerts)
 	} else {
-		config.GetCertificate = getNewGetCertificateFunc(c.BuildCertificates(), c.RejectUnknownSni)
+		config.GetCertificate = getNewGetCertficateFunc(c.BuildCertificates())
 	}
 
 	if sn := c.parseServerName(); len(sn) > 0 {

transport/internet/xtls/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0
-// 	protoc        v3.15.8
+// 	protoc        v3.14.0
 // source: transport/internet/xtls/config.proto
 
 package xtls
@@ -200,7 +200,6 @@ type Config struct {
 	CipherSuites string `protobuf:"bytes,9,opt,name=cipher_suites,json=cipherSuites,proto3" json:"cipher_suites,omitempty"`
 	// Whether the server selects its most preferred ciphersuite.
 	PreferServerCipherSuites bool `protobuf:"varint,10,opt,name=prefer_server_cipher_suites,json=preferServerCipherSuites,proto3" json:"prefer_server_cipher_suites,omitempty"`
-	RejectUnknownSni         bool `protobuf:"varint,12,opt,name=reject_unknown_sni,json=rejectUnknownSni,proto3" json:"reject_unknown_sni,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -305,13 +304,6 @@ func (x *Config) GetPreferServerCipherSuites() bool {
 	return false
 }
 
-func (x *Config) GetRejectUnknownSni() bool {
-	if x != nil {
-		return x.RejectUnknownSni
-	}
-	return false
-}
-
 var File_transport_internet_xtls_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_xtls_config_proto_rawDesc = []byte{
@@ -341,7 +333,7 @@ var file_transport_internet_xtls_config_proto_rawDesc = []byte{
 	0x0c, 0x45, 0x4e, 0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x00, 0x12,
 	0x14, 0x0a, 0x10, 0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f, 0x56, 0x45, 0x52,
 	0x49, 0x46, 0x59, 0x10, 0x01, 0x12, 0x13, 0x0a, 0x0f, 0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49,
-	0x54, 0x59, 0x5f, 0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0x82, 0x04, 0x0a, 0x06, 0x43,
+	0x54, 0x59, 0x5f, 0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xd4, 0x03, 0x0a, 0x06, 0x43,
 	0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x25, 0x0a, 0x0e, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x5f, 0x69,
 	0x6e, 0x73, 0x65, 0x63, 0x75, 0x72, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x08, 0x52, 0x0d, 0x61,
 	0x6c, 0x6c, 0x6f, 0x77, 0x49, 0x6e, 0x73, 0x65, 0x63, 0x75, 0x72, 0x65, 0x12, 0x4b, 0x0a, 0x0b,
@@ -371,17 +363,15 @@ var file_transport_internet_xtls_config_proto_rawDesc = []byte{
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 }
 
 var (

transport/internet/xtls/config.proto

@@ -64,7 +64,4 @@ message Config {
 
   // Whether the server selects its most preferred ciphersuite.
   bool prefer_server_cipher_suites = 10;
-
-
-  bool reject_unknown_sni = 12;
 }

transport/internet/xtls/unsafe.go

@@ -1,6 +0,0 @@
-package xtls
-
-import _ "unsafe"
-
-//go:linkname errNoCertificates github.com/xtls/go.errNoCertificates
-var errNoCertificates error