v1.4.5

Co-authored-by: JimhHan <50871214+JimhHan@users.noreply.github.com>

.github/workflows/release.yml

@@ -121,7 +121,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.16
+          go-version: ^1.17.1
 
       - name: Get project dependencies
         run: go mod download

.github/workflows/test.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: ^1.16
+          go-version: ^1.17.1
       - name: Checkout codebase
         uses: actions/checkout@v2
 

README.md

@@ -40,13 +40,16 @@
   - [luci-app-xray](https://github.com/yichya/luci-app-xray) ([openwrt-xray](https://github.com/yichya/openwrt-xray))
 - Windows
   - [v2rayN](https://github.com/2dust/v2rayN)
-  - [Qv2ray](https://github.com/Qv2ray/Qv2ray)
+  - [Qv2ray](https://github.com/Qv2ray/Qv2ray)  (This project had been archived and currently inactive)
   - [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
+- iOS & macOS (with M1 chip)
   - [Shadowrocket](https://apps.apple.com/app/shadowrocket/id932747118)
+- macOS (Intel chip & M1 chip)
+  - [Qv2ray](https://github.com/Qv2ray/Qv2ray) (This project had been archived and currently inactive)
 
 ## Credits
 

app/commander/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/commander/config.proto
 
 package commander
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	serial "github.com/xtls/xray-core/common/serial"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
@@ -22,10 +21,6 @@ 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
-
 // Config is the settings for Commander.
 type Config struct {
 	state         protoimpl.MessageState

app/commander/service.go

@@ -3,9 +3,10 @@ package commander
 import (
 	"context"
 
-	"github.com/xtls/xray-core/common"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/reflection"
+
+	"github.com/xtls/xray-core/common"
 )
 
 // Service is a Commander service.

app/dispatcher/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/dispatcher/config.proto
 
 package dispatcher
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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 SessionConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

app/dispatcher/default.go

@@ -309,10 +309,15 @@ 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 {
+	if d.router != nil && !skipRoutePick {
 		if route, err := d.router.PickRoute(routingLink); err == nil {
 			outTag := route.GetOutboundTag()
 			isPickRoute = true

app/dns/config.go

@@ -1,63 +0,0 @@
-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 v1.26.0
-// 	protoc        v3.15.8
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/dns/config.proto
 
 package dns
@@ -74,112 +74,12 @@ 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"`
@@ -224,20 +124,6 @@ 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
@@ -283,10 +169,6 @@ 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() {
@@ -365,27 +247,6 @@ 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
@@ -505,7 +366,8 @@ 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.
+	// domain. Xray will use this domain for IP queries. This field is only
+	// effective if ip is empty.
 	ProxiedDomain string `protobuf:"bytes,4,opt,name=proxied_domain,json=proxiedDomain,proto3" json:"proxied_domain,omitempty"`
 }
 
@@ -579,96 +441,73 @@ var file_app_dns_config_proto_rawDesc = []byte{
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 	0x2e, 0x61, 0x70, 0x70, 0x2e, 0x64, 0x6e, 0x73, 0x50, 0x01, 0x5a, 0x21, 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, 0x61, 0x70, 0x70, 0x2f, 0x64, 0x6e, 0x73, 0xaa, 0x02, 0x0c,
@@ -688,41 +527,37 @@ 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, 3)
+var file_app_dns_config_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
 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
-	(QueryStrategy)(0),                // 1: xray.app.dns.QueryStrategy
-	(CacheStrategy)(0),                // 2: xray.app.dns.CacheStrategy
-	(*NameServer)(nil),                // 3: xray.app.dns.NameServer
-	(*Config)(nil),                    // 4: xray.app.dns.Config
-	(*NameServer_PriorityDomain)(nil), // 5: xray.app.dns.NameServer.PriorityDomain
-	(*NameServer_OriginalRule)(nil),   // 6: xray.app.dns.NameServer.OriginalRule
-	nil,                               // 7: xray.app.dns.Config.HostsEntry
-	(*Config_HostMapping)(nil),        // 8: xray.app.dns.Config.HostMapping
-	(*net.Endpoint)(nil),              // 9: xray.common.net.Endpoint
-	(*router.GeoIP)(nil),              // 10: xray.app.router.GeoIP
-	(*net.IPOrDomain)(nil),            // 11: xray.common.net.IPOrDomain
+	(*NameServer)(nil),                // 1: xray.app.dns.NameServer
+	(*Config)(nil),                    // 2: xray.app.dns.Config
+	(*NameServer_PriorityDomain)(nil), // 3: xray.app.dns.NameServer.PriorityDomain
+	(*NameServer_OriginalRule)(nil),   // 4: xray.app.dns.NameServer.OriginalRule
+	nil,                               // 5: xray.app.dns.Config.HostsEntry
+	(*Config_HostMapping)(nil),        // 6: xray.app.dns.Config.HostMapping
+	(*net.Endpoint)(nil),              // 7: xray.common.net.Endpoint
+	(*router.GeoIP)(nil),              // 8: xray.app.router.GeoIP
+	(*net.IPOrDomain)(nil),            // 9: xray.common.net.IPOrDomain
 }
 var file_app_dns_config_proto_depIdxs = []int32{
-	9,  // 0: xray.app.dns.NameServer.address:type_name -> xray.common.net.Endpoint
-	5,  // 1: xray.app.dns.NameServer.prioritized_domain:type_name -> xray.app.dns.NameServer.PriorityDomain
-	10, // 2: xray.app.dns.NameServer.geoip:type_name -> xray.app.router.GeoIP
-	6,  // 3: xray.app.dns.NameServer.original_rules:type_name -> xray.app.dns.NameServer.OriginalRule
-	9,  // 4: xray.app.dns.Config.NameServers:type_name -> xray.common.net.Endpoint
-	3,  // 5: xray.app.dns.Config.name_server:type_name -> xray.app.dns.NameServer
-	7,  // 6: xray.app.dns.Config.Hosts:type_name -> xray.app.dns.Config.HostsEntry
-	8,  // 7: xray.app.dns.Config.static_hosts:type_name -> xray.app.dns.Config.HostMapping
-	2,  // 8: xray.app.dns.Config.cache_strategy:type_name -> xray.app.dns.CacheStrategy
-	1,  // 9: xray.app.dns.Config.query_strategy:type_name -> xray.app.dns.QueryStrategy
-	0,  // 10: xray.app.dns.NameServer.PriorityDomain.type:type_name -> xray.app.dns.DomainMatchingType
-	11, // 11: xray.app.dns.Config.HostsEntry.value:type_name -> xray.common.net.IPOrDomain
-	0,  // 12: xray.app.dns.Config.HostMapping.type:type_name -> xray.app.dns.DomainMatchingType
-	13, // [13:13] is the sub-list for method output_type
-	13, // [13:13] is the sub-list for method input_type
-	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
+	7,  // 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
+	8,  // 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
+	7,  // 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
+	5,  // 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
+	0,  // 8: xray.app.dns.NameServer.PriorityDomain.type:type_name -> xray.app.dns.DomainMatchingType
+	9,  // 9: xray.app.dns.Config.HostsEntry.value:type_name -> xray.common.net.IPOrDomain
+	0,  // 10: xray.app.dns.Config.HostMapping.type:type_name -> xray.app.dns.DomainMatchingType
+	11, // [11:11] is the sub-list for method output_type
+	11, // [11:11] is the sub-list for method input_type
+	11, // [11:11] is the sub-list for extension type_name
+	11, // [11:11] is the sub-list for extension extendee
+	0,  // [0:11] is the sub-list for field type_name
 }
 
 func init() { file_app_dns_config_proto_init() }
@@ -797,7 +632,7 @@ func file_app_dns_config_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_dns_config_proto_rawDesc,
-			NumEnums:      3,
+			NumEnums:      1,
 			NumMessages:   6,
 			NumExtensions: 0,
 			NumServices:   0,

app/dns/config.proto

@@ -12,8 +12,6 @@ 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;
@@ -37,18 +35,6 @@ 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
@@ -73,7 +59,8 @@ 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.
+    // domain. Xray will use this domain for IP queries. This field is only
+    // effective if ip is empty.
     string proxied_domain = 4;
   }
 
@@ -83,11 +70,4 @@ 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

@@ -2,312 +2,3 @@
 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/dnscommon.go

@@ -5,11 +5,12 @@ import (
 	"strings"
 	"time"
 
+	"golang.org/x/net/dns/dnsmessage"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
 	dns_feature "github.com/xtls/xray-core/features/dns"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 // Fqdn normalize domain make sure it ends with '.'

app/dns/dnscommon_test.go

@@ -7,10 +7,11 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/miekg/dns"
+	"golang.org/x/net/dns/dnsmessage"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
 	dns_feature "github.com/xtls/xray-core/features/dns"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 func Test_parseResponse(t *testing.T) {

app/dns/dohdns.go

@@ -12,6 +12,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"golang.org/x/net/dns/dnsmessage"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
@@ -23,7 +25,6 @@ import (
 	dns_feature "github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport/internet"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 // DoHNameServer implemented DNS over HTTPS (RFC8484) Wire Format,
@@ -42,10 +43,10 @@ type DoHNameServer struct {
 	name       string
 }
 
-// NewDoHNameServer creates DOH server object for remote resolving
-func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher) (*DoHNameServer, error) {
+// NewDoHNameServer creates DOH client object for remote resolving
+func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher, clientIP net.IP) (*DoHNameServer, error) {
 	newError("DNS: created Remote DOH client for ", url.String()).AtInfo().WriteToLog()
-	s := baseDOHNameServer(url, "DOH")
+	s := baseDOHNameServer(url, "DOH", clientIP)
 
 	s.dispatcher = dispatcher
 	tr := &http.Transport{
@@ -104,9 +105,9 @@ func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher) (*DoHNameServ
 }
 
 // NewDoHLocalNameServer creates DOH client object for local resolving
-func NewDoHLocalNameServer(url *url.URL) *DoHNameServer {
+func NewDoHLocalNameServer(url *url.URL, clientIP net.IP) *DoHNameServer {
 	url.Scheme = "https"
-	s := baseDOHNameServer(url, "DOHL")
+	s := baseDOHNameServer(url, "DOHL", clientIP)
 	tr := &http.Transport{
 		IdleConnTimeout:   90 * time.Second,
 		ForceAttemptHTTP2: true,
@@ -136,12 +137,13 @@ func NewDoHLocalNameServer(url *url.URL) *DoHNameServer {
 	return s
 }
 
-func baseDOHNameServer(url *url.URL, prefix string) *DoHNameServer {
+func baseDOHNameServer(url *url.URL, prefix string, clientIP net.IP) *DoHNameServer {
 	s := &DoHNameServer{
-		ips:    make(map[string]record),
-		pub:    pubsub.NewService(),
-		name:   prefix + "//" + url.Host,
-		dohURL: url.String(),
+		ips:      make(map[string]record),
+		clientIP: clientIP,
+		pub:      pubsub.NewService(),
+		name:     prefix + "//" + url.Host,
+		dohURL:   url.String(),
 	}
 	s.cleanup = &task.Periodic{
 		Interval: time.Minute,
@@ -151,7 +153,7 @@ func baseDOHNameServer(url *url.URL, prefix string) *DoHNameServer {
 	return s
 }
 
-// Name implements Server.
+// Name returns client name
 func (s *DoHNameServer) Name() string {
 	return s.name
 }
@@ -234,7 +236,7 @@ func (s *DoHNameServer) newReqID() uint16 {
 	return uint16(atomic.AddUint32(&s.reqID, 1))
 }
 
-func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
+func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, option dns_feature.IPOption) {
 	newError(s.name, " querying: ", domain).AtInfo().WriteToLog(session.ExportIDToError(ctx))
 
 	if s.name+"." == "DOH//"+domain {
@@ -242,7 +244,7 @@ func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, clientIP n
 		return
 	}
 
-	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP))
 
 	var deadline time.Time
 	if d, ok := ctx.Deadline(); ok {
@@ -263,8 +265,8 @@ func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, clientIP n
 			}
 
 			dnsCtx = session.ContextWithContent(dnsCtx, &session.Content{
-				Protocol:       "https",
-				SkipDNSResolve: true,
+				Protocol: "https",
+				//SkipRoutePick: true,
 			})
 
 			// forced to use mux for DOH
@@ -348,7 +350,7 @@ func (s *DoHNameServer) findIPsForDomain(domain string, option dns_feature.IPOpt
 	}
 
 	if len(ips) > 0 {
-		return toNetIP(ips)
+		return toNetIP(ips), nil
 	}
 
 	if lastErr != nil {
@@ -362,21 +364,15 @@ func (s *DoHNameServer) findIPsForDomain(domain string, option dns_feature.IPOpt
 	return nil, errRecordNotFound
 }
 
-// QueryIP implements Server.
-func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, cs CacheStrategy) ([]net.IP, error) { // nolint: dupl
+// QueryIP is called from dns.Server->queryIPTimeout
+func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]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_ALL || (cs == CacheStrategy_Cache_NOERROR && err == nil) {
-				newError(s.name, " cache HIT ", domain, " -> ", ips).Base(err).AtDebug().WriteToLog()
-				log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Error: err})
-				return ips, err
-			}
-		}
+	ips, err := s.findIPsForDomain(fqdn, option)
+	if err != errRecordNotFound {
+		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
@@ -405,7 +401,7 @@ func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, clientIP net
 		}
 		close(done)
 	}()
-	s.sendQuery(ctx, fqdn, clientIP, option)
+	s.sendQuery(ctx, fqdn, option)
 	start := time.Now()
 
 	for {

app/dns/fakedns/fakedns.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.13.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/dns/fakedns/fakedns.proto
 
 package fakedns
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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 FakeDnsPool struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -85,19 +80,18 @@ var File_app_dns_fakedns_fakedns_proto protoreflect.FileDescriptor
 var file_app_dns_fakedns_fakedns_proto_rawDesc = []byte{
 	0x0a, 0x1d, 0x61, 0x70, 0x70, 0x2f, 0x64, 0x6e, 0x73, 0x2f, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e,
 	0x73, 0x2f, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12,
-	0x1a, 0x76, 0x32, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x72, 0x65, 0x2e, 0x61, 0x70, 0x70, 0x2e,
-	0x64, 0x6e, 0x73, 0x2e, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x22, 0x40, 0x0a, 0x0b, 0x46,
-	0x61, 0x6b, 0x65, 0x44, 0x6e, 0x73, 0x50, 0x6f, 0x6f, 0x6c, 0x12, 0x17, 0x0a, 0x07, 0x69, 0x70,
-	0x5f, 0x70, 0x6f, 0x6f, 0x6c, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x06, 0x69, 0x70, 0x50,
-	0x6f, 0x6f, 0x6c, 0x12, 0x18, 0x0a, 0x07, 0x6c, 0x72, 0x75, 0x53, 0x69, 0x7a, 0x65, 0x18, 0x02,
-	0x20, 0x01, 0x28, 0x03, 0x52, 0x07, 0x6c, 0x72, 0x75, 0x53, 0x69, 0x7a, 0x65, 0x42, 0x5f, 0x0a,
-	0x1e, 0x63, 0x6f, 0x6d, 0x2e, 0x76, 0x32, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x72, 0x65, 0x2e,
-	0x61, 0x70, 0x70, 0x2e, 0x64, 0x6e, 0x73, 0x2e, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x50,
-	0x01, 0x5a, 0x1e, 0x76, 0x32, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x63, 0x6f, 0x72,
-	0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f, 0x64, 0x6e, 0x73, 0x2f, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e,
-	0x73, 0xaa, 0x02, 0x1a, 0x56, 0x32, 0x52, 0x61, 0x79, 0x2e, 0x43, 0x6f, 0x72, 0x65, 0x2e, 0x41,
-	0x70, 0x70, 0x2e, 0x44, 0x6e, 0x73, 0x2e, 0x46, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x62, 0x06,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x14, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x64, 0x6e, 0x73, 0x2e, 0x66, 0x61,
+	0x6b, 0x65, 0x64, 0x6e, 0x73, 0x22, 0x40, 0x0a, 0x0b, 0x46, 0x61, 0x6b, 0x65, 0x44, 0x6e, 0x73,
+	0x50, 0x6f, 0x6f, 0x6c, 0x12, 0x17, 0x0a, 0x07, 0x69, 0x70, 0x5f, 0x70, 0x6f, 0x6f, 0x6c, 0x18,
+	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x06, 0x69, 0x70, 0x50, 0x6f, 0x6f, 0x6c, 0x12, 0x18, 0x0a,
+	0x07, 0x6c, 0x72, 0x75, 0x53, 0x69, 0x7a, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x03, 0x52, 0x07,
+	0x6c, 0x72, 0x75, 0x53, 0x69, 0x7a, 0x65, 0x42, 0x5e, 0x0a, 0x18, 0x63, 0x6f, 0x6d, 0x2e, 0x78,
+	0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x64, 0x6e, 0x73, 0x2e, 0x66, 0x61, 0x6b, 0x65,
+	0x64, 0x6e, 0x73, 0x50, 0x01, 0x5a, 0x29, 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, 0x61, 0x70, 0x70, 0x2f, 0x64, 0x6e, 0x73, 0x2f, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73,
+	0xaa, 0x02, 0x14, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x44, 0x6e, 0x73, 0x2e,
+	0x46, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

app/dns/hosts.go

@@ -14,6 +14,25 @@ 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)
@@ -47,9 +66,6 @@ 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)
@@ -59,56 +75,49 @@ 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
 }
 
-func (h *StaticHosts) lookupInternal(domain string) []net.Address {
-	var ips []net.Address
-	for _, id := range h.matchers.Match(domain) {
+// LookupIP returns IP address for the given domain, if exists in this StaticHosts.
+func (h *StaticHosts) LookupIP(domain string, option dns.IPOption) []net.Address {
+	indices := 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 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)
+	return filterIP(ips, option)
 }

app/dns/hosts_test.go

@@ -20,20 +20,6 @@ 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",
@@ -46,7 +32,6 @@ 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},
 			},
 		},
 	}
@@ -55,7 +40,7 @@ func TestStaticHosts(t *testing.T) {
 	common.Must(err)
 
 	{
-		ips := hosts.Lookup("example.com", &dns.IPOption{
+		ips := hosts.LookupIP("example.com", dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 		})
@@ -68,33 +53,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		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{
+		ips := hosts.LookupIP("www.example.cn", dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 		})
@@ -107,7 +66,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		ips := hosts.Lookup("baidu.com", &dns.IPOption{
+		ips := hosts.LookupIP("baidu.com", dns.IPOption{
 			IPv4Enable: false,
 			IPv6Enable: true,
 		})

app/dns/nameserver.go

@@ -2,211 +2,40 @@ 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/routing"
+	"github.com/xtls/xray-core/features/dns/localdns"
 )
 
-// Server is the interface for Name Server.
-type Server interface {
+// Client is the interface for DNS client.
+type Client interface {
 	// Name of the Client.
 	Name() string
+
 	// QueryIP sends IP queries to its configured server.
-	QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns.IPOption, cs CacheStrategy) ([]net.IP, error)
+	QueryIP(ctx context.Context, domain string, option dns.IPOption) ([]net.IP, error)
 }
 
-// Client is the interface for DNS client.
-type Client struct {
-	server       Server
-	clientIP     net.IP
-	skipFallback bool
-	domains      []string
-	expectIPs    []*router.GeoIPMatcher
+type LocalNameServer struct {
+	client *localdns.Client
 }
 
-var errExpectedIPNonMatch = errors.New("expectIPs not match")
+func (s *LocalNameServer) QueryIP(_ context.Context, domain string, option dns.IPOption) ([]net.IP, error) {
+	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()
-		}
-
-		// Priotize local domains with specific TLDs or without any dot to local DNS
-		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),
-				})
-			}
-		}
-
-		// Establish domain rules
-		var rules []string
-		ruleCurr := 0
-		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
+func (s *LocalNameServer) Name() string {
+	return "localhost"
 }
 
-// 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()
-		}
+func NewLocalNameServer() *LocalNameServer {
+	newError("DNS: created localhost client").AtInfo().WriteToLog()
+	return &LocalNameServer{
+		client: localdns.New(),
 	}
-
-	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_test.go

@@ -1,60 +0,0 @@
-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

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

app/dns/nameserver_local.go

@@ -1,53 +0,0 @@
-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_quic.go

@@ -1,394 +0,0 @@
-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_ALL || (cs == CacheStrategy_Cache_NOERROR && err == nil) {
-				newError(s.name, " cache HIT ", domain, " -> ", ips).Base(err).AtDebug().WriteToLog()
-				log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Error: 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

@@ -1,60 +0,0 @@
-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_test.go

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

app/dns/options.go

@@ -1,16 +0,0 @@
-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

@@ -0,0 +1,437 @@
+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/dns/server_test.go

@@ -154,7 +154,11 @@ func TestUDPServerSubnet(t *testing.T) {
 
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
-	ips, err := client.LookupIP("google.com")
+	ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+		FakeEnable: false,
+	})
 	if err != nil {
 		t.Fatal("unexpected error: ", err)
 	}
@@ -209,7 +213,11 @@ func TestUDPServer(t *testing.T) {
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
 	{
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -220,7 +228,11 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		ips, err := client.LookupIP("facebook.com")
+		ips, err := client.LookupIP("facebook.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -231,7 +243,11 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		_, err := client.LookupIP("notexist.google.com")
+		_, err := client.LookupIP("notexist.google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err == nil {
 			t.Fatal("nil error")
 		}
@@ -241,8 +257,11 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		clientv6 := client.(feature_dns.IPv6Lookup)
-		ips, err := clientv6.LookupIPv6("ipv4only.google.com")
+		ips, err := client.LookupIP("ipv4only.google.com", feature_dns.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != feature_dns.ErrEmptyResponse {
 			t.Fatal("error: ", err)
 		}
@@ -254,7 +273,11 @@ func TestUDPServer(t *testing.T) {
 	dnsServer.Shutdown()
 
 	{
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -331,7 +354,11 @@ func TestPrioritizedDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -390,9 +417,12 @@ func TestUDPServerIPv6(t *testing.T) {
 	common.Must(err)
 
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
-	client6 := client.(feature_dns.IPv6Lookup)
 	{
-		ips, err := client6.LookupIPv6("ipv6.google.com")
+		ips, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -455,7 +485,11 @@ func TestStaticHostDomain(t *testing.T) {
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
 	{
-		ips, err := client.LookupIP("example.com")
+		ips, err := client.LookupIP("example.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -562,7 +596,11 @@ func TestIPMatch(t *testing.T) {
 	startTime := time.Now()
 
 	{
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -681,7 +719,11 @@ func TestLocalDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{ // Will match dotless:
-		ips, err := client.LookupIP("hostname")
+		ips, err := client.LookupIP("hostname", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -692,7 +734,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match domain:local
-		ips, err := client.LookupIP("hostname.local")
+		ips, err := client.LookupIP("hostname.local", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -703,7 +749,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match static ip
-		ips, err := client.LookupIP("hostnamestatic")
+		ips, err := client.LookupIP("hostnamestatic", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -714,7 +764,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match domain replacing
-		ips, err := client.LookupIP("hostnamealias")
+		ips, err := client.LookupIP("hostnamealias", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -725,7 +779,11 @@ 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")
+		ips, err := client.LookupIP("localhost", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -736,7 +794,11 @@ 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")
+		ips, err := client.LookupIP("localhost-a", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -747,7 +809,11 @@ 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")
+		ips, err := client.LookupIP("localhost-b", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -758,7 +824,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:
-		ips, err := client.LookupIP("Mijia Cloud")
+		ips, err := client.LookupIP("Mijia Cloud", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -920,7 +990,11 @@ 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")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -931,8 +1005,11 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 1,2 and server 1 returns unexpected ip, then server 2 returns expected one
-		clientv4 := client.(feature_dns.IPv4Lookup)
-		ips, err := clientv4.LookupIPv4("ipv6.google.com")
+		ips, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: false,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -943,7 +1020,11 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 3,1,2 and server 3 returns expected one
-		ips, err := client.LookupIP("api.google.com")
+		ips, err := client.LookupIP("api.google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -954,7 +1035,11 @@ 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")
+		ips, err := client.LookupIP("v2.api.google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}

app/dns/udpns.go

@@ -7,6 +7,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"golang.org/x/net/dns/dnsmessage"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
@@ -18,7 +20,6 @@ import (
 	dns_feature "github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport/internet/udp"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 type ClassicNameServer struct {
@@ -31,10 +32,10 @@ type ClassicNameServer struct {
 	udpServer *udp.Dispatcher
 	cleanup   *task.Periodic
 	reqID     uint32
+	clientIP  net.IP
 }
 
-// NewClassicNameServer creates udp server object for remote resolving.
-func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher) *ClassicNameServer {
+func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher, clientIP net.IP) *ClassicNameServer {
 	// default to 53 if unspecific
 	if address.Port == 0 {
 		address.Port = net.Port(53)
@@ -44,6 +45,7 @@ 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()),
 	}
@@ -56,12 +58,10 @@ 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()
@@ -103,7 +103,6 @@ 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 {
@@ -181,10 +180,10 @@ func (s *ClassicNameServer) addPendingRequest(req *dnsRequest) {
 	s.requests[id] = *req
 }
 
-func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
+func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, option dns_feature.IPOption) {
 	newError(s.name, " querying DNS for: ", domain).AtDebug().WriteToLog(session.ExportIDToError(ctx))
 
-	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP))
 
 	for _, req := range reqs {
 		s.addPendingRequest(req)
@@ -193,6 +192,7 @@ func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, client
 		if inbound := session.InboundFromContext(ctx); inbound != nil {
 			udpCtx = session.ContextWithInbound(udpCtx, inbound)
 		}
+
 		udpCtx = session.ContextWithContent(udpCtx, &session.Content{
 			Protocol: "dns",
 		})
@@ -234,7 +234,7 @@ func (s *ClassicNameServer) findIPsForDomain(domain string, option dns_feature.I
 	}
 
 	if len(ips) > 0 {
-		return toNetIP(ips)
+		return toNetIP(ips), nil
 	}
 
 	if lastErr != nil {
@@ -245,20 +245,14 @@ func (s *ClassicNameServer) findIPsForDomain(domain string, option dns_feature.I
 }
 
 // QueryIP implements Server.
-func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, cs CacheStrategy) ([]net.IP, error) {
+func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]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_ALL || (cs == CacheStrategy_Cache_NOERROR && err == nil) {
-				newError(s.name, " cache HIT ", domain, " -> ", ips).Base(err).AtDebug().WriteToLog()
-				log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Error: err})
-				return ips, err
-			}
-		}
+	ips, err := s.findIPsForDomain(fqdn, option)
+	if err != errRecordNotFound {
+		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
@@ -287,7 +281,7 @@ func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, clientIP
 		}
 		close(done)
 	}()
-	s.sendQuery(ctx, fqdn, clientIP, option)
+	s.sendQuery(ctx, fqdn, option)
 	start := time.Now()
 
 	for {

app/log/command/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/log/command/config.proto
 
 package command
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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

app/log/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/log/config.proto
 
 package log
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	log "github.com/xtls/xray-core/common/log"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
@@ -22,10 +21,6 @@ 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 LogType int32
 
 const (
@@ -134,7 +129,7 @@ func (x *Config) GetErrorLogLevel() log.Severity {
 	if x != nil {
 		return x.ErrorLogLevel
 	}
-	return log.Severity_Unknown
+	return log.Severity(0)
 }
 
 func (x *Config) GetErrorLogPath() string {

app/log/log_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/golang/mock/gomock"
+
 	"github.com/xtls/xray-core/app/log"
 	"github.com/xtls/xray-core/common"
 	clog "github.com/xtls/xray-core/common/log"

app/policy/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/policy/config.proto
 
 package policy
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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 Second struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

app/proxyman/command/command.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/proxyman/command/command.proto
 
 package command
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protocol "github.com/xtls/xray-core/common/protocol"
 	serial "github.com/xtls/xray-core/common/serial"
 	core "github.com/xtls/xray-core/core"
@@ -24,10 +23,6 @@ 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 AddUserOperation struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

app/proxyman/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        (unknown)
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/proxyman/config.proto
 
 package proxyman
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	net "github.com/xtls/xray-core/common/net"
 	serial "github.com/xtls/xray-core/common/serial"
 	internet "github.com/xtls/xray-core/transport/internet"
@@ -24,10 +23,6 @@ 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 KnownProtocols int32
 
 const (

app/proxyman/inbound/worker.go

@@ -6,6 +6,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
@@ -54,7 +56,7 @@ func getTProxyType(s *internet.MemoryStreamConfig) internet.SocketConfig_TProxyM
 	return s.SocketSettings.Tproxy
 }
 
-func (w *tcpWorker) callback(conn internet.Connection) {
+func (w *tcpWorker) callback(conn stat.Connection) {
 	ctx, cancel := context.WithCancel(w.ctx)
 	sid := session.NewID()
 	ctx = session.ContextWithID(ctx, sid)
@@ -80,7 +82,7 @@ func (w *tcpWorker) callback(conn internet.Connection) {
 	}
 
 	if w.uplinkCounter != nil || w.downlinkCounter != nil {
-		conn = &internet.StatCouterConnection{
+		conn = &stat.CounterConnection{
 			Connection:   conn,
 			ReadCounter:  w.uplinkCounter,
 			WriteCounter: w.downlinkCounter,
@@ -117,7 +119,7 @@ func (w *tcpWorker) Proxy() proxy.Inbound {
 
 func (w *tcpWorker) Start() error {
 	ctx := context.Background()
-	hub, err := internet.ListenTCP(ctx, w.address, w.port, w.stream, func(conn internet.Connection) {
+	hub, err := internet.ListenTCP(ctx, w.address, w.port, w.stream, func(conn stat.Connection) {
 		go w.callback(conn)
 	})
 	if err != nil {
@@ -436,13 +438,13 @@ type dsWorker struct {
 	ctx context.Context
 }
 
-func (w *dsWorker) callback(conn internet.Connection) {
+func (w *dsWorker) callback(conn stat.Connection) {
 	ctx, cancel := context.WithCancel(w.ctx)
 	sid := session.NewID()
 	ctx = session.ContextWithID(ctx, sid)
 
 	if w.uplinkCounter != nil || w.downlinkCounter != nil {
-		conn = &internet.StatCouterConnection{
+		conn = &stat.CounterConnection{
 			Connection:   conn,
 			ReadCounter:  w.uplinkCounter,
 			WriteCounter: w.downlinkCounter,
@@ -482,7 +484,7 @@ func (w *dsWorker) Port() net.Port {
 }
 func (w *dsWorker) Start() error {
 	ctx := context.Background()
-	hub, err := internet.ListenUnix(ctx, w.address, w.stream, func(conn internet.Connection) {
+	hub, err := internet.ListenUnix(ctx, w.address, w.stream, func(conn stat.Connection) {
 		go w.callback(conn)
 	})
 	if err != nil {

app/proxyman/outbound/handler.go

@@ -3,6 +3,8 @@ package outbound
 import (
 	"context"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/mux"
@@ -158,7 +160,7 @@ func (h *Handler) Address() net.Address {
 }
 
 // Dial implements internet.Dialer.
-func (h *Handler) Dial(ctx context.Context, dest net.Destination) (internet.Connection, error) {
+func (h *Handler) Dial(ctx context.Context, dest net.Destination) (stat.Connection, error) {
 	if h.senderSettings != nil {
 		if h.senderSettings.ProxySettings.HasTag() {
 			tag := h.senderSettings.ProxySettings.Tag
@@ -201,9 +203,9 @@ func (h *Handler) Dial(ctx context.Context, dest net.Destination) (internet.Conn
 	return h.getStatCouterConnection(conn), err
 }
 
-func (h *Handler) getStatCouterConnection(conn internet.Connection) internet.Connection {
+func (h *Handler) getStatCouterConnection(conn stat.Connection) stat.Connection {
 	if h.uplinkCounter != nil || h.downlinkCounter != nil {
-		return &internet.StatCouterConnection{
+		return &stat.CounterConnection{
 			Connection:   conn,
 			ReadCounter:  h.downlinkCounter,
 			WriteCounter: h.uplinkCounter,

app/proxyman/outbound/handler_test.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"testing"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/app/policy"
 	. "github.com/xtls/xray-core/app/proxyman/outbound"
 	"github.com/xtls/xray-core/app/stats"
@@ -12,7 +14,6 @@ import (
 	core "github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/outbound"
 	"github.com/xtls/xray-core/proxy/freedom"
-	"github.com/xtls/xray-core/transport/internet"
 )
 
 func TestInterfaces(t *testing.T) {
@@ -44,9 +45,9 @@ func TestOutboundWithoutStatCounter(t *testing.T) {
 		ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
 	})
 	conn, _ := h.(*Handler).Dial(ctx, net.TCPDestination(net.DomainAddress("localhost"), 13146))
-	_, ok := conn.(*internet.StatCouterConnection)
+	_, ok := conn.(*stat.CounterConnection)
 	if ok {
-		t.Errorf("Expected conn to not be StatCouterConnection")
+		t.Errorf("Expected conn to not be CounterConnection")
 	}
 }
 
@@ -73,8 +74,8 @@ func TestOutboundWithStatCounter(t *testing.T) {
 		ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
 	})
 	conn, _ := h.(*Handler).Dial(ctx, net.TCPDestination(net.DomainAddress("localhost"), 13146))
-	_, ok := conn.(*internet.StatCouterConnection)
+	_, ok := conn.(*stat.CounterConnection)
 	if !ok {
-		t.Errorf("Expected conn to be StatCouterConnection")
+		t.Errorf("Expected conn to be CounterConnection")
 	}
 }

app/reverse/bridge.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/common/mux"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/session"

app/reverse/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/reverse/config.proto
 
 package reverse
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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 Control_State int32
 
 const (

app/reverse/portal.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/mux"

app/router/command/command.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/router/command/command.proto
 
 package command
 
 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"
@@ -22,10 +21,6 @@ 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
-
 // RoutingContext is the context with information relative to routing process.
 // It conforms to the structure of xray.features.routing.Context and
 // xray.features.routing.Route.
@@ -91,7 +86,7 @@ func (x *RoutingContext) GetNetwork() net.Network {
 	if x != nil {
 		return x.Network
 	}
-	return net.Network_Unknown
+	return net.Network(0)
 }
 
 func (x *RoutingContext) GetSourceIPs() [][]byte {

app/router/command/command_test.go

@@ -8,6 +8,9 @@ import (
 	"github.com/golang/mock/gomock"
 	"github.com/google/go-cmp/cmp"
 	"github.com/google/go-cmp/cmp/cmpopts"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/test/bufconn"
+
 	"github.com/xtls/xray-core/app/router"
 	. "github.com/xtls/xray-core/app/router/command"
 	"github.com/xtls/xray-core/app/stats"
@@ -15,8 +18,6 @@ import (
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/testing/mocks"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/test/bufconn"
 )
 
 func TestServiceSubscribeRoutingStats(t *testing.T) {

app/router/command/config.go

@@ -28,12 +28,6 @@ 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_geoip_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/app/router"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"

app/router/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
-// 	protoc        v3.15.8
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/router/config.proto
 
 package router

app/router/router.go

@@ -80,13 +80,7 @@ func (r *Router) PickRoute(ctx routing.Context) (routing.Route, error) {
 }
 
 func (r *Router) pickRouteInternal(ctx routing.Context) (*Rule, routing.Context, error) {
-
-	// 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 {
+	if r.domainStrategy == Config_IpOnDemand {
 		ctx = routing_dns.ContextWithDNSClient(ctx, r.dns)
 	}
 
@@ -96,7 +90,7 @@ func (r *Router) pickRouteInternal(ctx routing.Context) (*Rule, routing.Context,
 		}
 	}
 
-	if r.domainStrategy != Config_IpIfNonMatch || len(ctx.GetTargetDomain()) == 0 || skipDNSResolve {
+	if r.domainStrategy != Config_IpIfNonMatch || len(ctx.GetTargetDomain()) == 0 {
 		return nil, ctx, common.ErrNoClue
 	}
 

app/router/router_test.go

@@ -5,10 +5,12 @@ import (
 	"testing"
 
 	"github.com/golang/mock/gomock"
+
 	. "github.com/xtls/xray-core/app/router"
 	"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"
@@ -115,7 +117,11 @@ func TestIPOnDemand(t *testing.T) {
 	defer mockCtl.Finish()
 
 	mockDNS := mocks.NewDNSClient(mockCtl)
-	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com")).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
+	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com"), dns.IPOption{
+		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))
@@ -150,7 +156,11 @@ func TestIPIfNonMatchDomain(t *testing.T) {
 	defer mockCtl.Finish()
 
 	mockDNS := mocks.NewDNSClient(mockCtl)
-	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com")).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
+	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com"), dns.IPOption{
+		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))

app/stats/command/command.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/stats/command/command.proto
 
 package command
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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 GetStatsRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

app/stats/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: app/stats/config.proto
 
 package stats
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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

common/buf/buffer.go

@@ -24,10 +24,17 @@ type Buffer struct {
 	UDP   *net.Destination
 }
 
-// New creates a Buffer with 0 length and 2K capacity.
+// New creates a Buffer with 0 length and 8K capacity.
 func New() *Buffer {
+	buf := pool.Get().([]byte)
+	if cap(buf) >= Size {
+		buf = buf[:Size]
+	} else {
+		buf = make([]byte, Size)
+	}
+
 	return &Buffer{
-		v: pool.Get().([]byte),
+		v: buf,
 	}
 }
 
@@ -50,8 +57,15 @@ 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: pool.Get().([]byte),
+		v: buf,
 	}
 }
 
@@ -64,7 +78,10 @@ func (b *Buffer) Release() {
 	p := b.v
 	b.v = nil
 	b.Clear()
-	pool.Put(p)
+
+	if cap(p) == Size {
+		pool.Put(p)
+	}
 	b.UDP = nil
 }
 

common/buf/buffer_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
+
 	"github.com/xtls/xray-core/common"
 	. "github.com/xtls/xray-core/common/buf"
 )

common/buf/io.go

@@ -6,6 +6,9 @@ import (
 	"os"
 	"syscall"
 	"time"
+
+	"github.com/xtls/xray-core/features/stats"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
 // Reader extends io.Reader with MultiBuffer.
@@ -29,9 +32,17 @@ type Writer interface {
 }
 
 // WriteAllBytes ensures all bytes are written into the given writer.
-func WriteAllBytes(writer io.Writer, payload []byte) error {
+func WriteAllBytes(writer io.Writer, payload []byte, c stats.Counter) error {
+	wc := 0
+	defer func() {
+		if c != nil {
+			c.Add(int64(wc))
+		}
+	}()
+
 	for len(payload) > 0 {
 		n, err := writer.Write(payload)
+		wc += n
 		if err != nil {
 			return err
 		}
@@ -65,7 +76,13 @@ func NewReader(reader io.Reader) Reader {
 			if err != nil {
 				newError("failed to get sysconn").Base(err).WriteToLog()
 			} else {
-				return NewReadVReader(reader, rawConn)
+				var counter stats.Counter
+
+				if statConn, ok := reader.(*stat.CounterConnection); ok {
+					reader = statConn.Connection
+					counter = statConn.ReadCounter
+				}
+				return NewReadVReader(reader, rawConn, counter)
 			}
 		}
 	}
@@ -104,13 +121,24 @@ func NewWriter(writer io.Writer) Writer {
 		return mw
 	}
 
-	if isPacketWriter(writer) {
+	var iConn = writer
+	if statConn, ok := writer.(*stat.CounterConnection); ok {
+		iConn = statConn.Connection
+	}
+
+	if isPacketWriter(iConn) {
 		return &SequentialWriter{
 			Writer: writer,
 		}
 	}
 
+	var counter stats.Counter
+
+	if statConn, ok := writer.(*stat.CounterConnection); ok {
+		counter = statConn.WriteCounter
+	}
 	return &BufferToBytesWriter{
-		Writer: writer,
+		Writer:  iConn,
+		counter: counter,
 	}
 }

common/buf/multi_buffer_test.go

@@ -9,6 +9,7 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
+
 	"github.com/xtls/xray-core/common"
 	. "github.com/xtls/xray-core/common/buf"
 )

common/buf/readv_posix.go

@@ -1,6 +1,5 @@
-// +build !windows
-// +build !wasm
-// +build !illumos
+//go:build !windows && !wasm && !illumos
+// +build !windows,!wasm,!illumos
 
 package buf
 

common/buf/readv_reader.go

@@ -1,12 +1,14 @@
+//go:build !wasm
 // +build !wasm
 
 package buf
 
 import (
 	"io"
-	"runtime"
 	"syscall"
 
+	"github.com/xtls/xray-core/features/stats"
+
 	"github.com/xtls/xray-core/common/platform"
 )
 
@@ -54,17 +56,19 @@ type ReadVReader struct {
 	rawConn syscall.RawConn
 	mr      multiReader
 	alloc   allocStrategy
+	counter stats.Counter
 }
 
 // NewReadVReader creates a new ReadVReader.
-func NewReadVReader(reader io.Reader, rawConn syscall.RawConn) *ReadVReader {
+func NewReadVReader(reader io.Reader, rawConn syscall.RawConn, counter stats.Counter) *ReadVReader {
 	return &ReadVReader{
 		Reader:  reader,
 		rawConn: rawConn,
 		alloc: allocStrategy{
 			current: 1,
 		},
-		mr: newMultiReader(),
+		mr:      newMultiReader(),
+		counter: counter,
 	}
 }
 
@@ -123,10 +127,16 @@ func (r *ReadVReader) ReadMultiBuffer() (MultiBuffer, error) {
 		if b.IsFull() {
 			r.alloc.Adjust(1)
 		}
+		if r.counter != nil && b != nil {
+			r.counter.Add(int64(b.Len()))
+		}
 		return MultiBuffer{b}, err
 	}
 
 	mb, err := r.readMulti()
+	if r.counter != nil && mb != nil {
+		r.counter.Add(int64(mb.Len()))
+	}
 	if err != nil {
 		return nil, err
 	}
@@ -134,17 +144,13 @@ func (r *ReadVReader) ReadMultiBuffer() (MultiBuffer, error) {
 	return mb, nil
 }
 
-var useReadv = true
+var useReadv bool
 
 func init() {
 	const defaultFlagValue = "NOT_DEFINED_AT_ALL"
 	value := platform.NewEnvFlag("xray.buf.readv").GetValue(func() string { return defaultFlagValue })
 	switch value {
-	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":
+	case defaultFlagValue, "auto", "enable":
 		useReadv = true
 	}
 }

common/buf/readv_reader_wasm.go

@@ -1,3 +1,4 @@
+//go:build wasm
 // +build wasm
 
 package buf

common/buf/readv_test.go

@@ -1,3 +1,4 @@
+//go:build !wasm
 // +build !wasm
 
 package buf_test
@@ -9,10 +10,11 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 
+	"golang.org/x/sync/errgroup"
+
 	"github.com/xtls/xray-core/common"
 	. "github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/testing/servers/tcp"
-	"golang.org/x/sync/errgroup"
 )
 
 func TestReadvReader(t *testing.T) {
@@ -50,7 +52,7 @@ func TestReadvReader(t *testing.T) {
 	rawConn, err := conn.(*net.TCPConn).SyscallConn()
 	common.Must(err)
 
-	reader := NewReadVReader(conn, rawConn)
+	reader := NewReadVReader(conn, rawConn, nil)
 	var rmb MultiBuffer
 	for {
 		mb, err := reader.ReadMultiBuffer()

common/buf/readv_unix.go

@@ -1,3 +1,4 @@
+//go:build illumos
 // +build illumos
 
 package buf

common/buf/writer.go

@@ -5,6 +5,8 @@ import (
 	"net"
 	"sync"
 
+	"github.com/xtls/xray-core/features/stats"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
 )
@@ -13,7 +15,8 @@ import (
 type BufferToBytesWriter struct {
 	io.Writer
 
-	cache [][]byte
+	counter stats.Counter
+	cache   [][]byte
 }
 
 // WriteMultiBuffer implements Writer. This method takes ownership of the given buffer.
@@ -26,7 +29,7 @@ func (w *BufferToBytesWriter) WriteMultiBuffer(mb MultiBuffer) error {
 	}
 
 	if len(mb) == 1 {
-		return WriteAllBytes(w.Writer, mb[0].Bytes())
+		return WriteAllBytes(w.Writer, mb[0].Bytes(), w.counter)
 	}
 
 	if cap(w.cache) < len(mb) {
@@ -45,9 +48,15 @@ func (w *BufferToBytesWriter) WriteMultiBuffer(mb MultiBuffer) error {
 	}()
 
 	nb := net.Buffers(bs)
-
+	wc := int64(0)
+	defer func() {
+		if w.counter != nil {
+			w.counter.Add(wc)
+		}
+	}()
 	for size > 0 {
 		n, err := nb.WriteTo(w.Writer)
+		wc += n
 		if err != nil {
 			return err
 		}
@@ -173,7 +182,7 @@ func (w *BufferedWriter) flushInternal() error {
 	w.buffer = nil
 
 	if writer, ok := w.writer.(io.Writer); ok {
-		err := WriteAllBytes(writer, b.Bytes())
+		err := WriteAllBytes(writer, b.Bytes(), nil)
 		b.Release()
 		return err
 	}

common/crypto/internal/chacha_core_gen.go

@@ -1,3 +1,4 @@
+//go:build generate
 // +build generate
 
 package main

common/crypto/io.go

@@ -50,7 +50,7 @@ func NewCryptionWriter(stream cipher.Stream, writer io.Writer) *CryptionWriter {
 func (w *CryptionWriter) Write(data []byte) (int, error) {
 	w.stream.XORKeyStream(data, data)
 
-	if err := buf.WriteAllBytes(w.writer, data); err != nil {
+	if err := buf.WriteAllBytes(w.writer, data, nil); err != nil {
 		return 0, err
 	}
 	return len(data), nil

common/errors/errorgen/main.go

@@ -2,11 +2,8 @@ package main
 
 import (
 	"fmt"
-	"log"
 	"os"
 	"path/filepath"
-
-	"github.com/xtls/xray-core/common"
 )
 
 func main() {
@@ -20,26 +17,21 @@ func main() {
 		pkg = "core"
 	}
 
-	moduleName, gmnErr := common.GetModuleName(pwd)
-	if gmnErr != nil {
-		fmt.Println("can not get module path", gmnErr)
-		os.Exit(1)
-	}
-
 	file, err := os.OpenFile("errors.generated.go", os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
 	if err != nil {
-		log.Fatalf("Failed to generate errors.generated.go: %v", err)
+		fmt.Printf("Failed to generate errors.generated.go: %v", err)
 		os.Exit(1)
 	}
 	defer file.Close()
 
-	fmt.Fprintln(file, "package", pkg)
-	fmt.Fprintln(file, "")
-	fmt.Fprintln(file, "import \""+moduleName+"/common/errors\"")
-	fmt.Fprintln(file, "")
-	fmt.Fprintln(file, "type errPathObjHolder struct{}")
-	fmt.Fprintln(file, "")
-	fmt.Fprintln(file, "func newError(values ...interface{}) *errors.Error {")
-	fmt.Fprintln(file, "	return errors.New(values...).WithPathObj(errPathObjHolder{})")
-	fmt.Fprintln(file, "}")
+	fmt.Fprintf(file, `package %s
+
+import "github.com/xtls/xray-core/common/errors"
+
+type errPathObjHolder struct{}
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).WithPathObj(errPathObjHolder{})
+}
+`, pkg)
 }

common/log/log.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/log/log.proto
 
 package log
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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 Severity int32
 
 const (

common/mux/client_test.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/golang/mock/gomock"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/mux"

common/net/address.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/net/address.proto
 
 package net
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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
-
 // Address of a network host. It may be either an IP address or a domain
 // address.
 type IPOrDomain struct {

common/net/destination.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/net/destination.proto
 
 package net
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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
-
 // Endpoint of a network connection.
 type Endpoint struct {
 	state         protoimpl.MessageState

common/net/network.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/net/network.proto
 
 package net
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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 Network int32
 
 const (

common/net/port.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/net/port.proto
 
 package net
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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
-
 // PortRange represents a range of ports.
 type PortRange struct {
 	state         protoimpl.MessageState

common/platform/ctlcmd/attr_other.go

@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package ctlcmd

common/platform/ctlcmd/attr_windows.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package ctlcmd

common/platform/others.go

@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package platform

common/platform/windows.go

@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package platform

common/protocol/dns/io.go

@@ -4,10 +4,11 @@ import (
 	"encoding/binary"
 	"sync"
 
+	"golang.org/x/net/dns/dnsmessage"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/serial"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 func PackMessage(msg *dnsmessage.Message) (*buf.Buffer, error) {

common/protocol/headers.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.15.4
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/protocol/headers.proto
 
 package protocol
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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 SecurityType int32
 
 const (

common/protocol/server_spec.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/protocol/server_spec.proto
 
 package protocol
 
 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"
@@ -22,10 +21,6 @@ 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 ServerEndpoint struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache

common/protocol/user.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/protocol/user.proto
 
 package protocol
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	serial "github.com/xtls/xray-core/common/serial"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
@@ -22,10 +21,6 @@ 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
-
 // User is a generic user for all procotols.
 type User struct {
 	state         protoimpl.MessageState

common/serial/typed_message.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: common/serial/typed_message.proto
 
 package serial
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -21,10 +20,6 @@ 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
-
 // TypedMessage is a serialized proto message along with its type name.
 type TypedMessage struct {
 	state         protoimpl.MessageState

common/session/session.go

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

core/config.pb.go

@@ -1,13 +1,12 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.15.6
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.18.0
 // source: core/config.proto
 
 package core
 
 import (
-	proto "github.com/golang/protobuf/proto"
 	serial "github.com/xtls/xray-core/common/serial"
 	global "github.com/xtls/xray-core/transport/global"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
@@ -23,10 +22,6 @@ 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
-
 // Config is the master config of Xray. Xray takes this config as input and
 // functions accordingly.
 type Config struct {

core/core.go

@@ -18,7 +18,7 @@ import (
 )
 
 var (
-	version  = "1.4.2"
+	version  = "1.4.5"
 	build    = "Custom"
 	codename = "Xray, Penetrates Everything."
 	intro    = "A unified platform for anti-censorship."

core/format.go

@@ -0,0 +1,4 @@
+package core
+
+//go:generate go install -v golang.org/x/tools/cmd/goimports@latest
+//go:generate go run ../infra/vformat/

core/proto.go

@@ -1,13 +1,5 @@
 package core
 
-import "path/filepath"
-
-//go:generate go install -v google.golang.org/protobuf/cmd/protoc-gen-go
-//go:generate go install -v google.golang.org/grpc/cmd/protoc-gen-go-grpc
-//go:generate go get -v -u github.com/gogo/protobuf/protoc-gen-gofast
-//go:generate go install -v github.com/gogo/protobuf/protoc-gen-gofast
+//go:generate go install -v google.golang.org/protobuf/cmd/protoc-gen-go@latest
+//go:generate go install -v google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
 //go:generate go run ../infra/vprotogen/main.go -pwd ./..
-
-// ProtoFilesUsingProtocGenGoFast is the map of Proto files
-// that use `protoc-gen-gofast` to generate pb.go files
-var ProtoFilesUsingProtocGenGoFast = map[string]bool{filepath.Join("proxy", "vless", "encoding", "addons.proto"): true}

core/xray_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/app/dispatcher"
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"

features/dns/client.go

@@ -14,12 +14,6 @@ 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
@@ -27,24 +21,7 @@ type Client interface {
 	features.Feature
 
 	// LookupIP returns IP address for the given domain. IPs may contain IPv4 and/or IPv6 addresses.
-	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)
+	LookupIP(domain string, option IPOption) ([]net.IP, error)
 }
 
 // ClientType returns the type of Client interface. Can be used for implementing common.HasType.
@@ -73,41 +50,3 @@ 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
-	}
-	LookupFakeOnly = func(d *IPOption) *IPOption {
-		d.FakeEnable = true
-		d.IPv4Enable = false
-		d.IPv6Enable = false
-		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

@@ -20,64 +20,41 @@ func (*Client) Start() error { return nil }
 func (*Client) Close() error { return nil }
 
 // LookupIP implements Client.
-func (*Client) LookupIP(host string) ([]net.IP, error) {
+func (*Client) LookupIP(host string, option dns.IPOption) ([]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)
 		}
 	}
-	if len(ipv6) == 0 {
-		return nil, dns.ErrEmptyResponse
+	switch {
+	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 ipv6, nil
+	return nil, dns.ErrEmptyResponse
 }
 
 // New create a new dns.Client that queries localhost for DNS.

features/routing/context.go

@@ -37,7 +37,4 @@ 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

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

features/routing/session/context.go

@@ -109,14 +109,6 @@ 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

@@ -1,27 +1,48 @@
 module github.com/xtls/xray-core
 
-go 1.16
+go 1.17
 
 require (
 	github.com/ghodss/yaml v1.0.1-0.20190212211648-25d852aebe32
-	github.com/golang/mock v1.5.0
+	github.com/golang/mock v1.6.0
 	github.com/golang/protobuf v1.5.2
-	github.com/google/go-cmp v0.5.5
+	github.com/google/go-cmp v0.5.6
 	github.com/gorilla/websocket v1.4.2
-	github.com/lucas-clemente/quic-go v0.20.0
-	github.com/miekg/dns v1.1.41
-	github.com/pelletier/go-toml v1.8.1
-	github.com/pires/go-proxyproto v0.5.0
-	github.com/refraction-networking/utls v0.0.0-20201210053706-2179f286686b
+	github.com/lucas-clemente/quic-go v0.23.0
+	github.com/miekg/dns v1.1.43
+	github.com/pelletier/go-toml v1.9.4
+	github.com/pires/go-proxyproto v0.6.1
+	github.com/refraction-networking/utls v0.0.0-20210713165636-0b2885c8c0d4
 	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 v0.0.0-20210312235212-74c10e2c17dc
-	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
-	golang.org/x/net v0.0.0-20210330230544-e57232859fb2
+	github.com/xtls/go v0.0.0-20210920065950-d4af136d3672
+	go.starlark.net v0.0.0-20210901212718-87f333178d59
+	golang.org/x/crypto v0.0.0-20210920023735-84f357641f63
+	golang.org/x/net v0.0.0-20210917221730-978cfadd31cf
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44
-	google.golang.org/grpc v1.36.1
-	google.golang.org/protobuf v1.26.0
-	h12.io/socks v1.0.2
+	golang.org/x/sys v0.0.0-20210917161153-d61c044b1678
+	google.golang.org/grpc v1.40.0
+	google.golang.org/protobuf v1.27.1
+	h12.io/socks v1.0.3
+)
+
+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 v0.1.6 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/genproto v0.0.0-20210917145530-b395a37504d4 // 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

@@ -8,18 +8,23 @@ 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=
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@@ -29,29 +34,35 @@ github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165/go.mod h1:c9O8+fp
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@@ -59,6 +70,7 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
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@@ -69,8 +81,9 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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@@ -83,6 +96,7 @@ github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0U
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@@ -96,39 +110,44 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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@@ -137,8 +156,9 @@ github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:
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 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
 github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c h1:pqy40B3MQWYrza7YZXOXgl0Nf0QGFqrOC0BKae1UNAA=
 github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c/go.mod h1:bR6DqgcAl1zTcOX8/pE2Qkj9XO00eCNqmKb7lXP8EAg=
@@ -167,6 +187,7 @@ github.com/shurcooL/users v0.0.0-20180125191416-49c67e49c537/go.mod h1:QJTqeLYED
 github.com/shurcooL/webdavfs v0.0.0-20170829043945-18c3829fa133/go.mod h1:hKmq5kWdCj2z2KEozexVbfEZIWiTjhE0+UjmZgPqehw=
 github.com/sourcegraph/annotate v0.0.0-20160123013949-f4cad6c6324d/go.mod h1:UdhH50NIW0fCiwBSr0co2m7BnFLdv4fQTgdqdJTHFeE=
 github.com/sourcegraph/syntaxhighlight v0.0.0-20170531221838-bd320f5d308e/go.mod h1:HuIsMU8RRBOtsCgI77wP899iHVBQpCmg4ErYMZB+2IA=
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@@ -176,11 +197,15 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/tarm/serial v0.0.0-20180830185346-98f6abe2eb07/go.mod h1:kDXzergiv9cbyO7IOYJZWg1U88JhDg3PB6klq9Hg2pA=
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@@ -189,14 +214,20 @@ golang.org/x/crypto v0.0.0-20190313024323-a1f597ede03a/go.mod h1:djNgcEr1/C05ACk
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@@ -210,20 +241,26 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
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@@ -240,16 +277,26 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
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+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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@@ -261,6 +308,12 @@ 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=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 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/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.1.6 h1:SIasE1FVIQOWz2GEAHFOmoW7xchJcqlucjSULTL0Ag4=
+golang.org/x/tools v0.1.6/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
 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=
@@ -279,8 +332,10 @@ 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 v0.0.0-20200526211855-cb27e3aa2013 h1:+kGHl1aib/qcwaRi1CbqBZ1rk19r85MNUf8HaBghugY=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20210917145530-b395a37504d4 h1:ysnBoUyeL/H6RCvNRhWHjKoDEmguI+mPU+qHgK8qv/w=
+google.golang.org/genproto v0.0.0-20210917145530-b395a37504d4/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=
@@ -288,8 +343,10 @@ 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 v1.36.1 h1:cmUfbeGKnz9+2DD/UYsMQXeqbHZqZDs4eQwW0sFOpBY=
-google.golang.org/grpc v1.36.1/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
+google.golang.org/grpc v1.36.0/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=
@@ -300,8 +357,9 @@ 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=
@@ -311,15 +369,18 @@ 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 v1.0.2 h1:cZhhbV8+DE0Y1kotwhr1a3RC3kFO7AtuZ4GLr3qKSc8=
-h12.io/socks v1.0.2/go.mod h1:AIhxy1jOId/XCz9BO+EIgNL2rQiPTBNnOfnVnQ+3Eck=
+h12.io/socks v1.0.3 h1:Ka3qaQewws4j4/eDQnOdpr4wXsC//dXtWvftlIcCQUo=
+h12.io/socks v1.0.3/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

@@ -11,12 +11,10 @@ import (
 )
 
 type NameServerConfig struct {
-	Address      *Address
-	ClientIP     *Address
-	Port         uint16
-	SkipFallback bool
-	Domains      []string
-	ExpectIPs    StringList
+	Address   *Address
+	Port      uint16
+	Domains   []string
+	ExpectIPs StringList
 }
 
 func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
@@ -27,18 +25,14 @@ 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"`
+		Address   *Address   `json:"address"`
+		Port      uint16     `json:"port"`
+		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
@@ -93,21 +87,12 @@ 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,
@@ -123,72 +108,28 @@ 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]*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"`
+	Servers  []*NameServerConfig `json:"servers"`
+	Hosts    map[string]*Address `json:"hosts"`
+	ClientIP *Address            `json:"clientIp"`
+	Tag      string              `json:"tag"`
 }
 
-type HostAddress struct {
-	addr  *Address
-	addrs []*Address
-}
-
-// 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(),
-			}
-		}
+func getHostMapping(addr *Address) *dns.Config_HostMapping {
+	if addr.Family().IsIP() {
 		return &dns.Config_HostMapping{
-			Ip: [][]byte{ha.addr.IP()},
+			Ip: [][]byte{[]byte(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(),
-			}
+	} else {
+		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
+		Tag: c.Tag,
 	}
 
 	if c.ClientIP != nil {
@@ -198,25 +139,6 @@ 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_proxy.go

@@ -1,18 +1,16 @@
 package conf
 
 import (
-	"strings"
-
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/proxy/dns"
 )
 
 type DNSOutboundConfig struct {
-	Network        Network  `json:"network"`
-	Address        *Address `json:"address"`
-	Port           uint16   `json:"port"`
-	DomainStrategy string   `json:"domainStrategy"`
+	Network Network  `json:"network"`
+	Address *Address `json:"address"`
+	Port    uint16   `json:"port"`
 }
 
 func (c *DNSOutboundConfig) Build() (proto.Message, error) {
@@ -25,12 +23,5 @@ func (c *DNSOutboundConfig) Build() (proto.Message, error) {
 	if c.Address != nil {
 		config.Server.Address = c.Address.Build()
 	}
-	config.DomainStrategy = dns.Config_USE_ALL
-	switch strings.ToLower(c.DomainStrategy) {
-	case "useip", "use_ip", "use-ip":
-		config.DomainStrategy = dns.Config_USE_IP
-	case "fake", "fakedns":
-		config.DomainStrategy = dns.Config_USE_FAKE
-	}
 	return config, nil
 }

infra/conf/dns_proxy_test.go

@@ -27,7 +27,6 @@ func TestDnsProxyConfig(t *testing.T) {
 					Address: net.NewIPOrDomain(net.IPAddress([]byte{8, 8, 8, 8})),
 					Port:    53,
 				},
-				DomainStrategy: dns.Config_USE_ALL,
 			},
 		},
 	})

infra/conf/dns_test.go

@@ -7,6 +7,7 @@ import (
 	"testing"
 
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/app/router"
 	"github.com/xtls/xray-core/common"
@@ -67,23 +68,17 @@ 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": ["127.0.0.1", "127.0.0.2"],
-					"keyword:google": ["8.8.8.8", "8.8.4.4"],
+					"geosite:test": "10.0.0.1",
+					"keyword:google": "8.8.8.8",
 					"regexp:.*\\.com": "8.8.4.4"
 				},
-				"clientIp": "10.0.0.1",
-				"queryStrategy": "UseIPv4",
-				"cacheStrategy": "disable",
-				"disableFallback": true
+				"clientIp": "10.0.0.1"
 			}`,
 			Parser: parserCreator(),
 			Output: &dns.Config{
@@ -98,8 +93,6 @@ 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,
@@ -128,28 +121,20 @@ func TestDNSConfigParsing(t *testing.T) {
 					{
 						Type:   dns.DomainMatchingType_Full,
 						Domain: "example.com",
-						Ip:     [][]byte{{127, 0, 0, 1}, {127, 0, 0, 2}},
+						Ip:     [][]byte{{10, 0, 0, 1}},
 					},
 					{
 						Type:   dns.DomainMatchingType_Keyword,
 						Domain: "google",
-						Ip:     [][]byte{{8, 8, 8, 8}, {8, 8, 4, 4}},
+						Ip:     [][]byte{{8, 8, 8, 8}},
 					},
 					{
 						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,
+				ClientIp: []byte{10, 0, 0, 1},
 			},
 		},
 	})

infra/conf/dokodemo.go

@@ -2,6 +2,7 @@ package conf
 
 import (
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/proxy/dokodemo"
 )
 

infra/conf/fakedns.go

@@ -2,6 +2,7 @@ package conf
 
 import (
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/app/dns/fakedns"
 	"github.com/xtls/xray-core/features/dns"
 )

infra/conf/freedom.go

@@ -5,6 +5,7 @@ import (
 	"strings"
 
 	"github.com/golang/protobuf/proto"
+
 	v2net "github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/proxy/freedom"
@@ -22,11 +23,11 @@ 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", "use-ip":
+	case "useip", "use_ip":
 		config.DomainStrategy = freedom.Config_USE_IP
-	case "useip4", "useipv4", "use_ip4", "use_ipv4", "use_ip_v4", "use-ip4", "use-ipv4", "use-ip-v4":
+	case "useip4", "useipv4", "use_ipv4", "use_ip_v4", "use_ip4":
 		config.DomainStrategy = freedom.Config_USE_IP4
-	case "useip6", "useipv6", "use_ip6", "use_ipv6", "use_ip_v6", "use-ip6", "use-ipv6", "use-ip-v6":
+	case "useip6", "useipv6", "use_ipv6", "use_ip_v6", "use_ip6":
 		config.DomainStrategy = freedom.Config_USE_IP6
 	}
 

infra/conf/general_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/common"
 	. "github.com/xtls/xray-core/infra/conf"
 )

infra/conf/grpc.go

@@ -7,10 +7,25 @@ import (
 )
 
 type GRPCConfig struct {
-	ServiceName string `json:"serviceName"`
-	MultiMode   bool   `json:"multiMode"`
+	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) {
-	return &grpc.Config{ServiceName: g.ServiceName, MultiMode: g.MultiMode}, nil
+func (g *GRPCConfig) Build() (proto.Message, error) {
+	if g.IdleTimeout <= 0 {
+		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/http.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 
 	"github.com/golang/protobuf/proto"
+
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/serial"
 	"github.com/xtls/xray-core/proxy/http"