mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-08-22 20:56:26 +00:00
253 lines
6.3 KiB
Go
253 lines
6.3 KiB
Go
package mux
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
|
|
"github.com/xtls/xray-core/common"
|
|
"github.com/xtls/xray-core/common/buf"
|
|
"github.com/xtls/xray-core/common/errors"
|
|
"github.com/xtls/xray-core/common/log"
|
|
"github.com/xtls/xray-core/common/net"
|
|
"github.com/xtls/xray-core/common/protocol"
|
|
"github.com/xtls/xray-core/common/session"
|
|
"github.com/xtls/xray-core/core"
|
|
"github.com/xtls/xray-core/features/routing"
|
|
"github.com/xtls/xray-core/transport"
|
|
"github.com/xtls/xray-core/transport/pipe"
|
|
)
|
|
|
|
type Server struct {
|
|
dispatcher routing.Dispatcher
|
|
}
|
|
|
|
// NewServer creates a new mux.Server.
|
|
func NewServer(ctx context.Context) *Server {
|
|
s := &Server{}
|
|
core.RequireFeatures(ctx, func(d routing.Dispatcher) {
|
|
s.dispatcher = d
|
|
})
|
|
return s
|
|
}
|
|
|
|
// Type implements common.HasType.
|
|
func (s *Server) Type() interface{} {
|
|
return s.dispatcher.Type()
|
|
}
|
|
|
|
// Dispatch implements routing.Dispatcher
|
|
func (s *Server) Dispatch(ctx context.Context, dest net.Destination) (*transport.Link, error) {
|
|
if dest.Address != muxCoolAddress {
|
|
return s.dispatcher.Dispatch(ctx, dest)
|
|
}
|
|
|
|
opts := pipe.OptionsFromContext(ctx)
|
|
uplinkReader, uplinkWriter := pipe.New(opts...)
|
|
downlinkReader, downlinkWriter := pipe.New(opts...)
|
|
|
|
_, err := NewServerWorker(ctx, s.dispatcher, &transport.Link{
|
|
Reader: uplinkReader,
|
|
Writer: downlinkWriter,
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &transport.Link{Reader: downlinkReader, Writer: uplinkWriter}, nil
|
|
}
|
|
|
|
// Start implements common.Runnable.
|
|
func (s *Server) Start() error {
|
|
return nil
|
|
}
|
|
|
|
// Close implements common.Closable.
|
|
func (s *Server) Close() error {
|
|
return nil
|
|
}
|
|
|
|
type ServerWorker struct {
|
|
dispatcher routing.Dispatcher
|
|
link *transport.Link
|
|
sessionManager *SessionManager
|
|
}
|
|
|
|
func NewServerWorker(ctx context.Context, d routing.Dispatcher, link *transport.Link) (*ServerWorker, error) {
|
|
worker := &ServerWorker{
|
|
dispatcher: d,
|
|
link: link,
|
|
sessionManager: NewSessionManager(),
|
|
}
|
|
go worker.run(ctx)
|
|
return worker, nil
|
|
}
|
|
|
|
func handle(ctx context.Context, s *Session, output buf.Writer) {
|
|
writer := NewResponseWriter(s.ID, output, s.transferType)
|
|
if err := buf.Copy(s.input, writer); err != nil {
|
|
newError("session ", s.ID, " ends.").Base(err).WriteToLog(session.ExportIDToError(ctx))
|
|
writer.hasError = true
|
|
}
|
|
|
|
writer.Close()
|
|
s.Close()
|
|
}
|
|
|
|
func (w *ServerWorker) ActiveConnections() uint32 {
|
|
return uint32(w.sessionManager.Size())
|
|
}
|
|
|
|
func (w *ServerWorker) Closed() bool {
|
|
return w.sessionManager.Closed()
|
|
}
|
|
|
|
func (w *ServerWorker) handleStatusKeepAlive(meta *FrameMetadata, reader *buf.BufferedReader) error {
|
|
if meta.Option.Has(OptionData) {
|
|
return buf.Copy(NewStreamReader(reader), buf.Discard)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata, reader *buf.BufferedReader) error {
|
|
newError("received request for ", meta.Target).WriteToLog(session.ExportIDToError(ctx))
|
|
{
|
|
msg := &log.AccessMessage{
|
|
To: meta.Target,
|
|
Status: log.AccessAccepted,
|
|
Reason: "",
|
|
}
|
|
if inbound := session.InboundFromContext(ctx); inbound != nil && inbound.Source.IsValid() {
|
|
msg.From = inbound.Source
|
|
msg.Email = inbound.User.Email
|
|
}
|
|
ctx = log.ContextWithAccessMessage(ctx, msg)
|
|
}
|
|
link, err := w.dispatcher.Dispatch(ctx, meta.Target)
|
|
if err != nil {
|
|
if meta.Option.Has(OptionData) {
|
|
buf.Copy(NewStreamReader(reader), buf.Discard)
|
|
}
|
|
return newError("failed to dispatch request.").Base(err)
|
|
}
|
|
s := &Session{
|
|
input: link.Reader,
|
|
output: link.Writer,
|
|
parent: w.sessionManager,
|
|
ID: meta.SessionID,
|
|
transferType: protocol.TransferTypeStream,
|
|
}
|
|
if meta.Target.Network == net.Network_UDP {
|
|
s.transferType = protocol.TransferTypePacket
|
|
}
|
|
w.sessionManager.Add(s)
|
|
go handle(ctx, s, w.link.Writer)
|
|
if !meta.Option.Has(OptionData) {
|
|
return nil
|
|
}
|
|
|
|
rr := s.NewReader(reader)
|
|
if err := buf.Copy(rr, s.output); err != nil {
|
|
buf.Copy(rr, buf.Discard)
|
|
common.Interrupt(s.input)
|
|
return s.Close()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *ServerWorker) handleStatusKeep(meta *FrameMetadata, reader *buf.BufferedReader) error {
|
|
if !meta.Option.Has(OptionData) {
|
|
return nil
|
|
}
|
|
|
|
s, found := w.sessionManager.Get(meta.SessionID)
|
|
if !found {
|
|
// Notify remote peer to close this session.
|
|
closingWriter := NewResponseWriter(meta.SessionID, w.link.Writer, protocol.TransferTypeStream)
|
|
closingWriter.Close()
|
|
|
|
return buf.Copy(NewStreamReader(reader), buf.Discard)
|
|
}
|
|
|
|
rr := s.NewReader(reader)
|
|
err := buf.Copy(rr, s.output)
|
|
|
|
if err != nil && buf.IsWriteError(err) {
|
|
newError("failed to write to downstream writer. closing session ", s.ID).Base(err).WriteToLog()
|
|
|
|
// Notify remote peer to close this session.
|
|
closingWriter := NewResponseWriter(meta.SessionID, w.link.Writer, protocol.TransferTypeStream)
|
|
closingWriter.Close()
|
|
|
|
drainErr := buf.Copy(rr, buf.Discard)
|
|
common.Interrupt(s.input)
|
|
s.Close()
|
|
return drainErr
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
func (w *ServerWorker) handleStatusEnd(meta *FrameMetadata, reader *buf.BufferedReader) error {
|
|
if s, found := w.sessionManager.Get(meta.SessionID); found {
|
|
if meta.Option.Has(OptionError) {
|
|
common.Interrupt(s.input)
|
|
common.Interrupt(s.output)
|
|
}
|
|
s.Close()
|
|
}
|
|
if meta.Option.Has(OptionData) {
|
|
return buf.Copy(NewStreamReader(reader), buf.Discard)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *ServerWorker) handleFrame(ctx context.Context, reader *buf.BufferedReader) error {
|
|
var meta FrameMetadata
|
|
err := meta.Unmarshal(reader)
|
|
if err != nil {
|
|
return newError("failed to read metadata").Base(err)
|
|
}
|
|
|
|
switch meta.SessionStatus {
|
|
case SessionStatusKeepAlive:
|
|
err = w.handleStatusKeepAlive(&meta, reader)
|
|
case SessionStatusEnd:
|
|
err = w.handleStatusEnd(&meta, reader)
|
|
case SessionStatusNew:
|
|
err = w.handleStatusNew(ctx, &meta, reader)
|
|
case SessionStatusKeep:
|
|
err = w.handleStatusKeep(&meta, reader)
|
|
default:
|
|
status := meta.SessionStatus
|
|
return newError("unknown status: ", status).AtError()
|
|
}
|
|
|
|
if err != nil {
|
|
return newError("failed to process data").Base(err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *ServerWorker) run(ctx context.Context) {
|
|
input := w.link.Reader
|
|
reader := &buf.BufferedReader{Reader: input}
|
|
|
|
defer w.sessionManager.Close()
|
|
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
default:
|
|
err := w.handleFrame(ctx, reader)
|
|
if err != nil {
|
|
if errors.Cause(err) != io.EOF {
|
|
newError("unexpected EOF").Base(err).WriteToLog(session.ExportIDToError(ctx))
|
|
common.Interrupt(input)
|
|
}
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|