mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-12-22 18:17:52 -05:00
415 lines
9.7 KiB
Go
415 lines
9.7 KiB
Go
package mux
|
|
|
|
//go:generate go run $GOPATH/src/v2ray.com/core/tools/generrorgen/main.go -pkg mux -path App,Proxyman,Mux
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"sync"
|
|
"time"
|
|
|
|
"v2ray.com/core/app"
|
|
"v2ray.com/core/app/dispatcher"
|
|
"v2ray.com/core/app/log"
|
|
"v2ray.com/core/app/proxyman"
|
|
"v2ray.com/core/common/buf"
|
|
"v2ray.com/core/common/errors"
|
|
"v2ray.com/core/common/net"
|
|
"v2ray.com/core/common/protocol"
|
|
"v2ray.com/core/proxy"
|
|
"v2ray.com/core/transport/ray"
|
|
)
|
|
|
|
const (
|
|
maxTotal = 128
|
|
)
|
|
|
|
type ClientManager struct {
|
|
access sync.Mutex
|
|
clients []*Client
|
|
proxy proxy.Outbound
|
|
dialer proxy.Dialer
|
|
config *proxyman.MultiplexingConfig
|
|
}
|
|
|
|
func NewClientManager(p proxy.Outbound, d proxy.Dialer, c *proxyman.MultiplexingConfig) *ClientManager {
|
|
return &ClientManager{
|
|
proxy: p,
|
|
dialer: d,
|
|
config: c,
|
|
}
|
|
}
|
|
|
|
func (m *ClientManager) Dispatch(ctx context.Context, outboundRay ray.OutboundRay) error {
|
|
m.access.Lock()
|
|
defer m.access.Unlock()
|
|
|
|
for _, client := range m.clients {
|
|
if client.Dispatch(ctx, outboundRay) {
|
|
return nil
|
|
}
|
|
}
|
|
|
|
client, err := NewClient(m.proxy, m.dialer, m)
|
|
if err != nil {
|
|
return newError("failed to create client").Base(err)
|
|
}
|
|
m.clients = append(m.clients, client)
|
|
client.Dispatch(ctx, outboundRay)
|
|
return nil
|
|
}
|
|
|
|
func (m *ClientManager) onClientFinish() {
|
|
m.access.Lock()
|
|
defer m.access.Unlock()
|
|
|
|
activeClients := make([]*Client, 0, len(m.clients))
|
|
|
|
for _, client := range m.clients {
|
|
if !client.Closed() {
|
|
activeClients = append(activeClients, client)
|
|
}
|
|
}
|
|
m.clients = activeClients
|
|
}
|
|
|
|
type Client struct {
|
|
sessionManager *SessionManager
|
|
inboundRay ray.InboundRay
|
|
ctx context.Context
|
|
cancel context.CancelFunc
|
|
manager *ClientManager
|
|
concurrency uint32
|
|
}
|
|
|
|
var muxCoolAddress = net.DomainAddress("v1.mux.cool")
|
|
var muxCoolPort = net.Port(9527)
|
|
|
|
// NewClient creates a new mux.Client.
|
|
func NewClient(p proxy.Outbound, dialer proxy.Dialer, m *ClientManager) (*Client, error) {
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
ctx = proxy.ContextWithTarget(ctx, net.TCPDestination(muxCoolAddress, muxCoolPort))
|
|
pipe := ray.NewRay(ctx)
|
|
|
|
go func() {
|
|
if err := p.Process(ctx, pipe, dialer); err != nil {
|
|
cancel()
|
|
log.Trace(errors.New("failed to handler mux client connection").Base(err).AtWarning())
|
|
}
|
|
}()
|
|
|
|
c := &Client{
|
|
sessionManager: NewSessionManager(),
|
|
inboundRay: pipe,
|
|
ctx: ctx,
|
|
cancel: cancel,
|
|
manager: m,
|
|
concurrency: m.config.Concurrency,
|
|
}
|
|
go c.fetchOutput()
|
|
go c.monitor()
|
|
return c, nil
|
|
}
|
|
|
|
func (m *Client) Closed() bool {
|
|
select {
|
|
case <-m.ctx.Done():
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func (m *Client) monitor() {
|
|
defer m.manager.onClientFinish()
|
|
|
|
timer := time.NewTicker(time.Second * 16)
|
|
defer timer.Stop()
|
|
|
|
for {
|
|
select {
|
|
case <-m.ctx.Done():
|
|
m.sessionManager.Close()
|
|
m.inboundRay.InboundInput().Close()
|
|
m.inboundRay.InboundOutput().CloseError()
|
|
return
|
|
case <-timer.C:
|
|
size := m.sessionManager.Size()
|
|
if size == 0 && m.sessionManager.CloseIfNoSession() {
|
|
m.cancel()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func fetchInput(ctx context.Context, s *Session, output buf.Writer) {
|
|
dest, _ := proxy.TargetFromContext(ctx)
|
|
transferType := protocol.TransferTypeStream
|
|
if dest.Network == net.Network_UDP {
|
|
transferType = protocol.TransferTypePacket
|
|
}
|
|
s.transferType = transferType
|
|
writer := NewWriter(s.ID, dest, output, transferType)
|
|
defer writer.Close()
|
|
defer s.Close()
|
|
|
|
log.Trace(newError("dispatching request to ", dest))
|
|
data, _ := s.input.ReadTimeout(time.Millisecond * 500)
|
|
if err := writer.Write(data); err != nil {
|
|
log.Trace(newError("failed to write first payload").Base(err))
|
|
return
|
|
}
|
|
if err := buf.Copy(s.input, writer); err != nil {
|
|
log.Trace(newError("failed to fetch all input").Base(err))
|
|
}
|
|
}
|
|
|
|
func (m *Client) Dispatch(ctx context.Context, outboundRay ray.OutboundRay) bool {
|
|
sm := m.sessionManager
|
|
if sm.Size() >= int(m.concurrency) || sm.Count() >= maxTotal {
|
|
return false
|
|
}
|
|
|
|
select {
|
|
case <-m.ctx.Done():
|
|
return false
|
|
default:
|
|
}
|
|
|
|
s := sm.Allocate()
|
|
if s == nil {
|
|
return false
|
|
}
|
|
s.input = outboundRay.OutboundInput()
|
|
s.output = outboundRay.OutboundOutput()
|
|
go fetchInput(ctx, s, m.inboundRay.InboundInput())
|
|
return true
|
|
}
|
|
|
|
func drain(reader io.Reader) error {
|
|
return buf.Copy(NewStreamReader(reader), buf.Discard)
|
|
}
|
|
|
|
func (m *Client) handleStatueKeepAlive(meta *FrameMetadata, reader io.Reader) error {
|
|
if meta.Option.Has(OptionData) {
|
|
return drain(reader)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (m *Client) handleStatusNew(meta *FrameMetadata, reader io.Reader) error {
|
|
if meta.Option.Has(OptionData) {
|
|
return drain(reader)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (m *Client) handleStatusKeep(meta *FrameMetadata, reader io.Reader) error {
|
|
if !meta.Option.Has(OptionData) {
|
|
return nil
|
|
}
|
|
|
|
if s, found := m.sessionManager.Get(meta.SessionID); found {
|
|
return buf.Copy(s.NewReader(reader), s.output, buf.IgnoreWriterError())
|
|
}
|
|
return drain(reader)
|
|
}
|
|
|
|
func (m *Client) handleStatusEnd(meta *FrameMetadata, reader io.Reader) error {
|
|
if s, found := m.sessionManager.Get(meta.SessionID); found {
|
|
s.Close()
|
|
}
|
|
if meta.Option.Has(OptionData) {
|
|
return drain(reader)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (m *Client) fetchOutput() {
|
|
defer m.cancel()
|
|
|
|
reader := buf.ToBytesReader(m.inboundRay.InboundOutput())
|
|
metaReader := NewMetadataReader(reader)
|
|
|
|
for {
|
|
meta, err := metaReader.Read()
|
|
if err != nil {
|
|
if errors.Cause(err) != io.EOF {
|
|
log.Trace(newError("failed to read metadata").Base(err))
|
|
}
|
|
break
|
|
}
|
|
|
|
switch meta.SessionStatus {
|
|
case SessionStatusKeepAlive:
|
|
err = m.handleStatueKeepAlive(meta, reader)
|
|
case SessionStatusEnd:
|
|
err = m.handleStatusEnd(meta, reader)
|
|
case SessionStatusNew:
|
|
err = m.handleStatusNew(meta, reader)
|
|
case SessionStatusKeep:
|
|
err = m.handleStatusKeep(meta, reader)
|
|
default:
|
|
log.Trace(newError("unknown status: ", meta.SessionStatus).AtWarning())
|
|
return
|
|
}
|
|
|
|
if err != nil {
|
|
log.Trace(newError("failed to process data").Base(err))
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
type Server struct {
|
|
dispatcher dispatcher.Interface
|
|
}
|
|
|
|
// NewServer creates a new mux.Server.
|
|
func NewServer(ctx context.Context) *Server {
|
|
s := &Server{}
|
|
space := app.SpaceFromContext(ctx)
|
|
space.OnInitialize(func() error {
|
|
d := dispatcher.FromSpace(space)
|
|
if d == nil {
|
|
return newError("no dispatcher in space")
|
|
}
|
|
s.dispatcher = d
|
|
return nil
|
|
})
|
|
return s
|
|
}
|
|
|
|
func (s *Server) Dispatch(ctx context.Context, dest net.Destination) (ray.InboundRay, error) {
|
|
if dest.Address != muxCoolAddress {
|
|
return s.dispatcher.Dispatch(ctx, dest)
|
|
}
|
|
|
|
ray := ray.NewRay(ctx)
|
|
worker := &ServerWorker{
|
|
dispatcher: s.dispatcher,
|
|
outboundRay: ray,
|
|
sessionManager: NewSessionManager(),
|
|
}
|
|
go worker.run(ctx)
|
|
return ray, nil
|
|
}
|
|
|
|
type ServerWorker struct {
|
|
dispatcher dispatcher.Interface
|
|
outboundRay ray.OutboundRay
|
|
sessionManager *SessionManager
|
|
}
|
|
|
|
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 {
|
|
log.Trace(newError("session ", s.ID, " ends: ").Base(err))
|
|
}
|
|
writer.Close()
|
|
s.Close()
|
|
}
|
|
|
|
func (w *ServerWorker) handleStatusKeepAlive(meta *FrameMetadata, reader io.Reader) error {
|
|
if meta.Option.Has(OptionData) {
|
|
return drain(reader)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata, reader io.Reader) error {
|
|
log.Trace(newError("received request for ", meta.Target))
|
|
inboundRay, err := w.dispatcher.Dispatch(ctx, meta.Target)
|
|
if err != nil {
|
|
if meta.Option.Has(OptionData) {
|
|
drain(reader)
|
|
}
|
|
return newError("failed to dispatch request.").Base(err)
|
|
}
|
|
s := &Session{
|
|
input: inboundRay.InboundOutput(),
|
|
output: inboundRay.InboundInput(),
|
|
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.outboundRay.OutboundOutput())
|
|
if meta.Option.Has(OptionData) {
|
|
return buf.Copy(s.NewReader(reader), s.output, buf.IgnoreWriterError())
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *ServerWorker) handleStatusKeep(meta *FrameMetadata, reader io.Reader) error {
|
|
if !meta.Option.Has(OptionData) {
|
|
return nil
|
|
}
|
|
if s, found := w.sessionManager.Get(meta.SessionID); found {
|
|
return buf.Copy(s.NewReader(reader), s.output, buf.IgnoreWriterError())
|
|
}
|
|
return drain(reader)
|
|
}
|
|
|
|
func (w *ServerWorker) handleStatusEnd(meta *FrameMetadata, reader io.Reader) error {
|
|
if s, found := w.sessionManager.Get(meta.SessionID); found {
|
|
s.Close()
|
|
}
|
|
if meta.Option.Has(OptionData) {
|
|
return drain(reader)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *ServerWorker) handleFrame(ctx context.Context, reader io.Reader) error {
|
|
metaReader := NewMetadataReader(reader)
|
|
meta, err := metaReader.Read()
|
|
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:
|
|
return newError("unknown status: ", meta.SessionStatus).AtWarning()
|
|
}
|
|
|
|
if err != nil {
|
|
return newError("failed to process data").Base(err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *ServerWorker) run(ctx context.Context) {
|
|
input := w.outboundRay.OutboundInput()
|
|
reader := buf.ToBytesReader(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 {
|
|
log.Trace(newError("unexpected EOF").Base(err))
|
|
input.CloseError()
|
|
}
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|