DNS Header for KCP (#1672)

* dns header

* fixed domain name encoding for dns header

---------

Co-authored-by: kerry <lvhaiyangkerry@gmail.com>
This commit is contained in:
sduoduo233 2023-02-25 01:06:24 +08:00 committed by GitHub
parent c8b4580869
commit 336b2daeb9
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 237 additions and 0 deletions

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@ -4,6 +4,7 @@ import (
"sort"
"github.com/golang/protobuf/proto"
"github.com/xtls/xray-core/transport/internet/headers/dns"
"github.com/xtls/xray-core/transport/internet/headers/http"
"github.com/xtls/xray-core/transport/internet/headers/noop"
"github.com/xtls/xray-core/transport/internet/headers/srtp"
@ -49,6 +50,19 @@ func (WireguardAuthenticator) Build() (proto.Message, error) {
return new(wireguard.WireguardConfig), nil
}
type DNSAuthenticator struct {
Domain string `json:"domain"`
}
func (v *DNSAuthenticator) Build() (proto.Message, error) {
config := new(dns.Config)
config.Domain = "www.baidu.com"
if len(v.Domain) > 0 {
config.Domain = v.Domain
}
return config, nil
}
type DTLSAuthenticator struct{}
func (DTLSAuthenticator) Build() (proto.Message, error) {

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@ -37,6 +37,7 @@ var (
"wechat-video": func() interface{} { return new(WechatVideoAuthenticator) },
"dtls": func() interface{} { return new(DTLSAuthenticator) },
"wireguard": func() interface{} { return new(WireguardAuthenticator) },
"dns": func() interface{} { return new(DNSAuthenticator) },
}, "type", "")
tcpHeaderLoader = NewJSONConfigLoader(ConfigCreatorCache{

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@ -0,0 +1,153 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.28.1
// protoc v3.21.12
// source: transport/internet/headers/dns/config.proto
package dns
import (
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
reflect "reflect"
sync "sync"
)
const (
// Verify that this generated code is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
// Verify that runtime/protoimpl is sufficiently up-to-date.
_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)
type Config struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Domain string `protobuf:"bytes,1,opt,name=domain,proto3" json:"domain,omitempty"`
}
func (x *Config) Reset() {
*x = Config{}
if protoimpl.UnsafeEnabled {
mi := &file_transport_internet_headers_dns_config_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *Config) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*Config) ProtoMessage() {}
func (x *Config) ProtoReflect() protoreflect.Message {
mi := &file_transport_internet_headers_dns_config_proto_msgTypes[0]
if protoimpl.UnsafeEnabled && x != nil {
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
if ms.LoadMessageInfo() == nil {
ms.StoreMessageInfo(mi)
}
return ms
}
return mi.MessageOf(x)
}
// Deprecated: Use Config.ProtoReflect.Descriptor instead.
func (*Config) Descriptor() ([]byte, []int) {
return file_transport_internet_headers_dns_config_proto_rawDescGZIP(), []int{0}
}
func (x *Config) GetDomain() string {
if x != nil {
return x.Domain
}
return ""
}
var File_transport_internet_headers_dns_config_proto protoreflect.FileDescriptor
var file_transport_internet_headers_dns_config_proto_rawDesc = []byte{
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0x4e, 0x53, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
}
var (
file_transport_internet_headers_dns_config_proto_rawDescOnce sync.Once
file_transport_internet_headers_dns_config_proto_rawDescData = file_transport_internet_headers_dns_config_proto_rawDesc
)
func file_transport_internet_headers_dns_config_proto_rawDescGZIP() []byte {
file_transport_internet_headers_dns_config_proto_rawDescOnce.Do(func() {
file_transport_internet_headers_dns_config_proto_rawDescData = protoimpl.X.CompressGZIP(file_transport_internet_headers_dns_config_proto_rawDescData)
})
return file_transport_internet_headers_dns_config_proto_rawDescData
}
var file_transport_internet_headers_dns_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
var file_transport_internet_headers_dns_config_proto_goTypes = []interface{}{
(*Config)(nil), // 0: xray.transport.internet.headers.dns.Config
}
var file_transport_internet_headers_dns_config_proto_depIdxs = []int32{
0, // [0:0] is the sub-list for method output_type
0, // [0:0] is the sub-list for method input_type
0, // [0:0] is the sub-list for extension type_name
0, // [0:0] is the sub-list for extension extendee
0, // [0:0] is the sub-list for field type_name
}
func init() { file_transport_internet_headers_dns_config_proto_init() }
func file_transport_internet_headers_dns_config_proto_init() {
if File_transport_internet_headers_dns_config_proto != nil {
return
}
if !protoimpl.UnsafeEnabled {
file_transport_internet_headers_dns_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*Config); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
}
type x struct{}
out := protoimpl.TypeBuilder{
File: protoimpl.DescBuilder{
GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
RawDescriptor: file_transport_internet_headers_dns_config_proto_rawDesc,
NumEnums: 0,
NumMessages: 1,
NumExtensions: 0,
NumServices: 0,
},
GoTypes: file_transport_internet_headers_dns_config_proto_goTypes,
DependencyIndexes: file_transport_internet_headers_dns_config_proto_depIdxs,
MessageInfos: file_transport_internet_headers_dns_config_proto_msgTypes,
}.Build()
File_transport_internet_headers_dns_config_proto = out.File
file_transport_internet_headers_dns_config_proto_rawDesc = nil
file_transport_internet_headers_dns_config_proto_goTypes = nil
file_transport_internet_headers_dns_config_proto_depIdxs = nil
}

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@ -0,0 +1,12 @@
syntax = "proto3";
package xray.transport.internet.headers.dns;
option csharp_namespace = "Xray.Transport.Internet.Headers.DNS";
option go_package = "github.com/xtls/xray-core/transport/internet/headers/dns";
option java_package = "com.xray.transport.internet.headers.dns";
option java_multiple_files = true;
message Config {
string domain = 1;
}

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@ -0,0 +1,57 @@
package dns
import (
"context"
"encoding/binary"
"github.com/miekg/dns"
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/dice"
)
type DNS struct {
header []byte
}
func (d DNS) Size() int32 {
return int32(len(d.header))
}
// Serialize implements PacketHeader.
func (d DNS) Serialize(b []byte) {
copy(b, d.header)
binary.BigEndian.PutUint16(b[0:], dice.RollUint16()) // random transaction ID
}
// NewDNS returns a new DNS instance based on given config.
func NewDNS(ctx context.Context, config interface{}) (interface{}, error) {
var header []byte
header = binary.BigEndian.AppendUint16(header, 0x0000) // Transaction ID
header = binary.BigEndian.AppendUint16(header, 0x0100) // Flags: Standard query
header = binary.BigEndian.AppendUint16(header, 0x0001) // Questions
header = binary.BigEndian.AppendUint16(header, 0x0000) // Answer RRs
header = binary.BigEndian.AppendUint16(header, 0x0000) // Authority RRs
header = binary.BigEndian.AppendUint16(header, 0x0000) // Additional RRs
buf := make([]byte, 0x100)
off1, err := dns.PackDomainName(dns.Fqdn(config.(*Config).Domain), buf, 0, nil, false)
if err != nil {
return nil, err
}
header = append(header, buf[:off1]...)
header = binary.BigEndian.AppendUint16(header, 0x0001) // Type: A
header = binary.BigEndian.AppendUint16(header, 0x0001) // Class: IN
return DNS{
header: header,
}, nil
}
func init() {
common.Must(common.RegisterConfig((*Config)(nil), NewDNS))
}