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Refactor: VLESS & VMess & Mux UDP FullCone NAT 

https://t.me/projectXray/242770
This commit is contained in:
RPRX 2021-02-11 01:28:21 +00:00 committed by GitHub
parent 523c416bb5
commit 1174ff3090
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 186 additions and 39 deletions
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2
common/mux/client.go
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@ -330,7 +330,7 @@ func (m *ClientWorker) handleStatusKeep(meta *FrameMetadata, reader *buf.Buffere
return buf.Copy(NewStreamReader(reader), buf.Discard)
}
rr := s.NewReader(reader)
rr := s.NewReader(reader, &meta.Target)
err := buf.Copy(rr, s.output)
if err != nil && buf.IsWriteError(err) {
newError("failed to write to downstream. closing session ", s.ID).Base(err).WriteToLog()

5
common/mux/frame.go
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@ -81,6 +81,9 @@ func (f FrameMetadata) WriteTo(b *buf.Buffer) error {
if err := addrParser.WriteAddressPort(b, f.Target.Address, f.Target.Port); err != nil {
return err
}
} else if b.UDP != nil {
b.WriteByte(byte(TargetNetworkUDP))
addrParser.WriteAddressPort(b, b.UDP.Address, b.UDP.Port)
}
len1 := b.Len()
@ -119,7 +122,7 @@ func (f *FrameMetadata) UnmarshalFromBuffer(b *buf.Buffer) error {
f.Option = bitmask.Byte(b.Byte(3))
f.Target.Network = net.Network_Unknown
if f.SessionStatus == SessionStatusNew {
if f.SessionStatus == SessionStatusNew || (f.SessionStatus == SessionStatusKeep && b.Len() != 4) {
if b.Len() < 8 {
return newError("insufficient buffer: ", b.Len())
}

8
common/mux/reader.go
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@ -5,6 +5,7 @@ import (
"github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/common/crypto"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/serial"
)
@ -12,13 +13,15 @@ import (
type PacketReader struct {
reader io.Reader
eof bool
dest *net.Destination
}
// NewPacketReader creates a new PacketReader.
func NewPacketReader(reader io.Reader) *PacketReader {
func NewPacketReader(reader io.Reader, dest *net.Destination) *PacketReader {
return &PacketReader{
reader: reader,
eof: false,
dest: dest,
}
}
@ -43,6 +46,9 @@ func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
return nil, err
}
r.eof = true
if r.dest != nil && r.dest.Network == net.Network_UDP {
b.UDP = r.dest
}
return buf.MultiBuffer{b}, nil
}

4
common/mux/server.go
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@ -145,7 +145,7 @@ func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata,
return nil
}
rr := s.NewReader(reader)
rr := s.NewReader(reader, &meta.Target)
if err := buf.Copy(rr, s.output); err != nil {
buf.Copy(rr, buf.Discard)
common.Interrupt(s.input)
@ -168,7 +168,7 @@ func (w *ServerWorker) handleStatusKeep(meta *FrameMetadata, reader *buf.Buffere
return buf.Copy(NewStreamReader(reader), buf.Discard)
}
rr := s.NewReader(reader)
rr := s.NewReader(reader, &meta.Target)
err := buf.Copy(rr, s.output)
if err != nil && buf.IsWriteError(err) {

5
common/mux/session.go
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@ -5,6 +5,7 @@ import (
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/protocol"
)
@ -152,9 +153,9 @@ func (s *Session) Close() error {
}
// NewReader creates a buf.Reader based on the transfer type of this Session.
func (s *Session) NewReader(reader *buf.BufferedReader) buf.Reader {
func (s *Session) NewReader(reader *buf.BufferedReader, dest *net.Destination) buf.Reader {
if s.transferType == protocol.TransferTypeStream {
return NewStreamReader(reader)
}
return NewPacketReader(reader)
return NewPacketReader(reader, dest)
}

3
common/mux/writer.go
View File

@ -63,6 +63,9 @@ func (w *Writer) writeMetaOnly() error {
func writeMetaWithFrame(writer buf.Writer, meta FrameMetadata, data buf.MultiBuffer) error {
frame := buf.New()
if len(data) == 1 {
frame.UDP = data[0].UDP
}
if err := meta.WriteTo(frame); err != nil {
return err
}

137
common/vudp/vudp.go Normal file
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@ -0,0 +1,137 @@
package vudp
import (
"io"
"github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/protocol"
)
var addrParser = protocol.NewAddressParser(
protocol.AddressFamilyByte(byte(protocol.AddressTypeIPv4), net.AddressFamilyIPv4),
protocol.AddressFamilyByte(byte(protocol.AddressTypeDomain), net.AddressFamilyDomain),
protocol.AddressFamilyByte(byte(protocol.AddressTypeIPv6), net.AddressFamilyIPv6),
protocol.PortThenAddress(),
)
func NewPacketWriter(writer buf.Writer, dest net.Destination) *PacketWriter {
return &PacketWriter{
Writer: writer,
Dest: dest,
}
}
type PacketWriter struct {
Writer buf.Writer
Dest net.Destination
}
func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
defer buf.ReleaseMulti(mb)
mb2Write := make(buf.MultiBuffer, 0, len(mb))
for _, b := range mb {
length := b.Len()
if length == 0 || length+666 > buf.Size {
continue
}
eb := buf.New()
eb.Write([]byte{0, 0, 0, 0})
if w.Dest.Network == net.Network_UDP {
eb.WriteByte(1) // New
eb.WriteByte(1) // Opt
eb.WriteByte(2) // UDP
addrParser.WriteAddressPort(eb, w.Dest.Address, w.Dest.Port)
w.Dest.Network = net.Network_Unknown
} else {
eb.WriteByte(2) // Keep
eb.WriteByte(1)
if b.UDP != nil {
eb.WriteByte(2)
addrParser.WriteAddressPort(eb, b.UDP.Address, b.UDP.Port)
}
}
l := eb.Len() - 2
eb.SetByte(0, byte(l>>8))
eb.SetByte(1, byte(l))
eb.WriteByte(byte(length >> 8))
eb.WriteByte(byte(length))
eb.Write(b.Bytes())
mb2Write = append(mb2Write, eb)
}
if mb2Write.IsEmpty() {
return nil
}
return w.Writer.WriteMultiBuffer(mb2Write)
}
func NewPacketReader(reader io.Reader) *PacketReader {
return &PacketReader{
Reader: reader,
cache: make([]byte, 2),
}
}
type PacketReader struct {
Reader io.Reader
cache []byte
}
func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
for {
if _, err := io.ReadFull(r.Reader, r.cache); err != nil {
return nil, err
}
l := int32(r.cache[0])<<8 | int32(r.cache[1])
if l < 4 {
return nil, io.EOF
}
b := buf.New()
if _, err := b.ReadFullFrom(r.Reader, l); err != nil {
b.Release()
return nil, err
}
discard := false
switch b.Byte(2) {
case 2:
if l != 4 {
b.Advance(5)
addr, port, err := addrParser.ReadAddressPort(nil, b)
if err != nil {
b.Release()
return nil, err
}
b.UDP = &net.Destination{
Network: net.Network_UDP,
Address: addr,
Port: port,
}
}
case 4:
discard = true
default:
b.Release()
return nil, io.EOF
}
if b.Byte(3) == 1 {
if _, err := io.ReadFull(r.Reader, r.cache); err != nil {
b.Release()
return nil, err
}
length := int32(r.cache[0])<<8 | int32(r.cache[1])
if length > 0 {
b.Clear()
if _, err := b.ReadFullFrom(r.Reader, length); err != nil {
b.Release()
return nil, err
}
if !discard {
return buf.MultiBuffer{b}, nil
}
}
}
b.Release()
}
}

32
core/xray.go
View File

@ -3,13 +3,8 @@ package core
import (
"context"
"reflect"
"runtime/debug"
"strings"
"sync"
"github.com/golang/protobuf/proto"
"github.com/xtls/xray-core/app/proxyman"
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/serial"
"github.com/xtls/xray-core/features"
@ -184,32 +179,7 @@ func NewWithContext(ctx context.Context, config *Config) (*Instance, error) {
}
func initInstanceWithConfig(config *Config, server *Instance) (bool, error) {
cone := true
v, t := false, false
for _, outbound := range config.Outbound {
s := strings.ToLower(outbound.ProxySettings.Type)
l := len(s)
if l >= 16 && s[11:16] == "vless" || l >= 16 && s[11:16] == "vmess" {
v = true
continue
}
if l >= 17 && s[11:17] == "trojan" || l >= 22 && s[11:22] == "shadowsocks" {
t = true
if outbound.SenderSettings != nil {
var m proxyman.SenderConfig
proto.Unmarshal(outbound.SenderSettings.Value, &m)
if m.MultiplexSettings != nil && m.MultiplexSettings.Enabled {
cone = false
break
}
}
}
}
if v && !t {
cone = false
}
server.ctx = context.WithValue(server.ctx, "cone", cone)
defer debug.FreeOSMemory()
server.ctx = context.WithValue(server.ctx, "cone", true)
if config.Transport != nil {
features.PrintDeprecatedFeatureWarning("global transport settings")

13
proxy/vless/outbound/outbound.go
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@ -16,6 +16,7 @@ import (
"github.com/xtls/xray-core/common/session"
"github.com/xtls/xray-core/common/signal"
"github.com/xtls/xray-core/common/task"
"github.com/xtls/xray-core/common/vudp"
core "github.com/xtls/xray-core/core"
"github.com/xtls/xray-core/features/policy"
"github.com/xtls/xray-core/features/stats"
@ -175,6 +176,12 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
clientReader := link.Reader // .(*pipe.Reader)
clientWriter := link.Writer // .(*pipe.Writer)
if request.Command == protocol.RequestCommandUDP {
request.Command = protocol.RequestCommandMux
request.Address = net.DomainAddress("v1.mux.cool")
request.Port = net.Port(666)
}
postRequest := func() error {
defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
@ -185,6 +192,9 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
// default: serverWriter := bufferWriter
serverWriter := encoding.EncodeBodyAddons(bufferWriter, request, requestAddons)
if request.Command == protocol.RequestCommandMux && request.Port == 666 {
serverWriter = vudp.NewPacketWriter(serverWriter, target)
}
if err := buf.CopyOnceTimeout(clientReader, serverWriter, time.Millisecond*100); err != nil && err != buf.ErrNotTimeoutReader && err != buf.ErrReadTimeout {
return err // ...
}
@ -216,6 +226,9 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
// default: serverReader := buf.NewReader(conn)
serverReader := encoding.DecodeBodyAddons(conn, request, responseAddons)
if request.Command == protocol.RequestCommandMux && request.Port == 666 {
serverReader = vudp.NewPacketReader(conn)
}
if rawConn != nil {
var counter stats.Counter

16
proxy/vmess/outbound/outbound.go
View File

@ -15,6 +15,7 @@ import (
"github.com/xtls/xray-core/common/session"
"github.com/xtls/xray-core/common/signal"
"github.com/xtls/xray-core/common/task"
"github.com/xtls/xray-core/common/vudp"
core "github.com/xtls/xray-core/core"
"github.com/xtls/xray-core/features/policy"
"github.com/xtls/xray-core/proxy/vmess"
@ -122,6 +123,12 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
ctx, cancel := context.WithCancel(ctx)
timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
if request.Command == protocol.RequestCommandUDP {
request.Command = protocol.RequestCommandMux
request.Address = net.DomainAddress("v1.mux.cool")
request.Port = net.Port(666)
}
requestDone := func() error {
defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
@ -131,6 +138,10 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
}
bodyWriter := session.EncodeRequestBody(request, writer)
bodyWriter2 := bodyWriter
if request.Command == protocol.RequestCommandMux && request.Port == 666 {
bodyWriter = vudp.NewPacketWriter(bodyWriter, target)
}
if err := buf.CopyOnceTimeout(input, bodyWriter, time.Millisecond*100); err != nil && err != buf.ErrNotTimeoutReader && err != buf.ErrReadTimeout {
return newError("failed to write first payload").Base(err)
}
@ -144,7 +155,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
}
if request.Option.Has(protocol.RequestOptionChunkStream) {
if err := bodyWriter.WriteMultiBuffer(buf.MultiBuffer{}); err != nil {
if err := bodyWriter2.WriteMultiBuffer(buf.MultiBuffer{}); err != nil {
return err
}
}
@ -163,6 +174,9 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
h.handleCommand(rec.Destination(), header.Command)
bodyReader := session.DecodeResponseBody(request, reader)
if request.Command == protocol.RequestCommandMux && request.Port == 666 {
bodyReader = vudp.NewPacketReader(&buf.BufferedReader{Reader: bodyReader})
}
return buf.Copy(bodyReader, output, buf.UpdateActivity(timer))
}