func (v *VMessOutboundHandler) handleResponse(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, dest v2net.Destination, output buf.Writer, finish *sync.Mutex) {
defer finish.Unlock()
reader := bufio.NewReader(conn)
defer reader.Release()
header, err := session.DecodeResponseHeader(reader)
if err != nil {
conn.SetReusable(false)
log.Warning("VMess|Outbound: Failed to read response from ", request.Destination(), ": ", err)
return
}
v.handleCommand(dest, header.Command)
conn.SetReusable(header.Option.Has(protocol.ResponseOptionConnectionReuse))
reader.SetCached(false)
bodyReader := session.DecodeResponseBody(request, reader)
defer bodyReader.Release()
if err := buf.PipeUntilEOF(bodyReader, output); err != nil {
conn.SetReusable(false)
}
return
}
func (v *Server) handleConnection(connection internet.Connection) {
defer connection.Close()
timedReader := v2net.NewTimeOutReader(v.config.Timeout, connection)
reader := bufio.NewReader(timedReader)
defer reader.Release()
writer := bufio.NewWriter(connection)
defer writer.Release()
auth, auth4, err := protocol.ReadAuthentication(reader)
if err != nil && errors.Cause(err) != protocol.Socks4Downgrade {
if errors.Cause(err) != io.EOF {
log.Warning("Socks: failed to read authentication: ", err)
}
return
}
clientAddr := v2net.DestinationFromAddr(connection.RemoteAddr())
if err != nil && err == protocol.Socks4Downgrade {
v.handleSocks4(clientAddr, reader, writer, auth4)
} else {
v.handleSocks5(clientAddr, reader, writer, auth)
}
}
func (s *Server) processTCP(ctx context.Context, conn internet.Connection) error {
conn.SetReusable(false)
timedReader := net.NewTimeOutReader(16 /* seconds, for handshake */, conn)
reader := bufio.NewReader(timedReader)
inboundDest := proxy.InboundDestinationFromContext(ctx)
session := &ServerSession{
config: s.config,
port: inboundDest.Port,
}
source := proxy.SourceFromContext(ctx)
request, err := session.Handshake(reader, conn)
if err != nil {
log.Access(source, "", log.AccessRejected, err)
log.Info("Socks|Server: Failed to read request: ", err)
return err
}
if request.Command == protocol.RequestCommandTCP {
dest := request.Destination()
log.Info("Socks|Server: TCP Connect request to ", dest)
log.Access(source, dest, log.AccessAccepted, "")
timedReader.SetTimeOut(s.config.Timeout)
ctx = proxy.ContextWithDestination(ctx, dest)
return s.transport(ctx, reader, conn)
}
if request.Command == protocol.RequestCommandUDP {
return s.handleUDP()
}
return nil
}
func (v *VMessInboundHandler) Process(ctx context.Context, network net.Network, connection internet.Connection) error {
connReader := net.NewTimeOutReader(8, connection)
reader := bufio.NewReader(connReader)
session := encoding.NewServerSession(v.clients)
request, err := session.DecodeRequestHeader(reader)
if err != nil {
if errors.Cause(err) != io.EOF {
log.Access(connection.RemoteAddr(), "", log.AccessRejected, err)
log.Info("VMess|Inbound: Invalid request from ", connection.RemoteAddr(), ": ", err)
}
connection.SetReusable(false)
return err
}
log.Access(connection.RemoteAddr(), request.Destination(), log.AccessAccepted, "")
log.Info("VMess|Inbound: Received request for ", request.Destination())
connection.SetReusable(request.Option.Has(protocol.RequestOptionConnectionReuse))
ctx = proxy.ContextWithDestination(ctx, request.Destination())
ctx = protocol.ContextWithUser(ctx, request.User)
ray := v.packetDispatcher.DispatchToOutbound(ctx)
input := ray.InboundInput()
output := ray.InboundOutput()
userSettings := request.User.GetSettings()
connReader.SetTimeOut(userSettings.PayloadReadTimeout)
reader.SetBuffered(false)
requestDone := signal.ExecuteAsync(func() error {
return transferRequest(session, request, reader, input)
})
writer := bufio.NewWriter(connection)
response := &protocol.ResponseHeader{
Command: v.generateCommand(ctx, request),
}
if connection.Reusable() {
response.Option.Set(protocol.ResponseOptionConnectionReuse)
}
responseDone := signal.ExecuteAsync(func() error {
return transferResponse(session, request, response, output, writer)
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("VMess|Inbound: Connection ending with ", err)
connection.SetReusable(false)
input.CloseError()
output.CloseError()
return err
}
if err := writer.Flush(); err != nil {
log.Info("VMess|Inbound: Failed to flush remain data: ", err)
connection.SetReusable(false)
return err
}
return nil
}
func (s *Server) handleConnection(ctx context.Context, conn internet.Connection) error {
conn.SetReusable(false)
timedReader := net.NewTimeOutReader(16, conn)
bufferedReader := bufio.NewReader(timedReader)
request, bodyReader, err := ReadTCPSession(s.user, bufferedReader)
if err != nil {
log.Access(conn.RemoteAddr(), "", log.AccessRejected, err)
log.Info("Shadowsocks|Server: Failed to create request from: ", conn.RemoteAddr(), ": ", err)
return err
}
bufferedReader.SetBuffered(false)
userSettings := s.user.GetSettings()
timedReader.SetTimeOut(userSettings.PayloadReadTimeout)
dest := request.Destination()
log.Access(conn.RemoteAddr(), dest, log.AccessAccepted, "")
log.Info("Shadowsocks|Server: Tunnelling request to ", dest)
ctx = proxy.ContextWithDestination(ctx, dest)
ctx = protocol.ContextWithUser(ctx, request.User)
ray := s.packetDispatcher.DispatchToOutbound(ctx)
requestDone := signal.ExecuteAsync(func() error {
bufferedWriter := bufio.NewWriter(conn)
responseWriter, err := WriteTCPResponse(request, bufferedWriter)
if err != nil {
log.Warning("Shadowsocks|Server: Failed to write response: ", err)
return err
}
payload, err := ray.InboundOutput().Read()
if err != nil {
return err
}
if err := responseWriter.Write(payload); err != nil {
return err
}
payload.Release()
if err := bufferedWriter.SetBuffered(false); err != nil {
return err
}
if err := buf.PipeUntilEOF(ray.InboundOutput(), responseWriter); err != nil {
log.Info("Shadowsocks|Server: Failed to transport all TCP response: ", err)
return err
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
defer ray.InboundInput().Close()
if err := buf.PipeUntilEOF(bodyReader, ray.InboundInput()); err != nil {
log.Info("Shadowsocks|Server: Failed to transport all TCP request: ", err)
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("Shadowsocks|Server: Connection ends with ", err)
ray.InboundInput().CloseError()
ray.InboundOutput().CloseError()
return err
}
return nil
}
// Dispatch implements OutboundHandler.Dispatch().
func (v *VMessOutboundHandler) Process(ctx context.Context, outboundRay ray.OutboundRay) error {
var rec *protocol.ServerSpec
var conn internet.Connection
dialer := proxy.DialerFromContext(ctx)
err := retry.ExponentialBackoff(5, 100).On(func() error {
rec = v.serverPicker.PickServer()
rawConn, err := dialer.Dial(ctx, rec.Destination())
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Warning("VMess|Outbound: Failed to find an available destination:", err)
return err
}
defer conn.Close()
target := proxy.DestinationFromContext(ctx)
log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination())
command := protocol.RequestCommandTCP
if target.Network == net.Network_UDP {
command = protocol.RequestCommandUDP
}
request := &protocol.RequestHeader{
Version: encoding.Version,
User: rec.PickUser(),
Command: command,
Address: target.Address,
Port: target.Port,
Option: protocol.RequestOptionChunkStream,
}
rawAccount, err := request.User.GetTypedAccount()
if err != nil {
log.Warning("VMess|Outbound: Failed to get user account: ", err)
return err
}
account := rawAccount.(*vmess.InternalAccount)
request.Security = account.Security
conn.SetReusable(true)
if conn.Reusable() { // Conn reuse may be disabled on transportation layer
request.Option.Set(protocol.RequestOptionConnectionReuse)
}
input := outboundRay.OutboundInput()
output := outboundRay.OutboundOutput()
session := encoding.NewClientSession(protocol.DefaultIDHash)
requestDone := signal.ExecuteAsync(func() error {
writer := bufio.NewWriter(conn)
session.EncodeRequestHeader(request, writer)
bodyWriter := session.EncodeRequestBody(request, writer)
firstPayload, err := input.ReadTimeout(time.Millisecond * 500)
if err != nil && err != ray.ErrReadTimeout {
return errors.Base(err).Message("VMess|Outbound: Failed to get first payload.")
}
if !firstPayload.IsEmpty() {
if err := bodyWriter.Write(firstPayload); err != nil {
return errors.Base(err).Message("VMess|Outbound: Failed to write first payload.")
}
firstPayload.Release()
}
writer.SetBuffered(false)
if err := buf.PipeUntilEOF(input, bodyWriter); err != nil {
return err
}
if request.Option.Has(protocol.RequestOptionChunkStream) {
if err := bodyWriter.Write(buf.NewLocal(8)); err != nil {
return err
}
}
return nil
})
responseDone := signal.ExecuteAsync(func() error {
defer output.Close()
reader := bufio.NewReader(conn)
header, err := session.DecodeResponseHeader(reader)
if err != nil {
return err
}
v.handleCommand(rec.Destination(), header.Command)
conn.SetReusable(header.Option.Has(protocol.ResponseOptionConnectionReuse))
reader.SetBuffered(false)
bodyReader := session.DecodeResponseBody(request, reader)
if err := buf.PipeUntilEOF(bodyReader, output); err != nil {
return err
}
return nil
})
if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
log.Info("VMess|Outbound: Connection ending with ", err)
conn.SetReusable(false)
input.CloseError()
output.CloseError()
return err
}
return nil
}
func (v *Server) handleConnection(conn internet.Connection) {
defer conn.Close()
conn.SetReusable(false)
timedReader := v2net.NewTimeOutReader(16, conn)
defer timedReader.Release()
bufferedReader := bufio.NewReader(timedReader)
defer bufferedReader.Release()
request, bodyReader, err := ReadTCPSession(v.user, bufferedReader)
if err != nil {
log.Access(conn.RemoteAddr(), "", log.AccessRejected, err)
log.Info("Shadowsocks|Server: Failed to create request from: ", conn.RemoteAddr(), ": ", err)
return
}
defer bodyReader.Release()
bufferedReader.SetCached(false)
userSettings := v.user.GetSettings()
timedReader.SetTimeOut(userSettings.PayloadReadTimeout)
dest := request.Destination()
log.Access(conn.RemoteAddr(), dest, log.AccessAccepted, "")
log.Info("Shadowsocks|Server: Tunnelling request to ", dest)
ray := v.packetDispatcher.DispatchToOutbound(&proxy.SessionInfo{
Source: v2net.DestinationFromAddr(conn.RemoteAddr()),
Destination: dest,
User: request.User,
Inbound: v.meta,
})
defer ray.InboundOutput().Release()
var writeFinish sync.Mutex
writeFinish.Lock()
go func() {
defer writeFinish.Unlock()
bufferedWriter := bufio.NewWriter(conn)
defer bufferedWriter.Release()
responseWriter, err := WriteTCPResponse(request, bufferedWriter)
if err != nil {
log.Warning("Shadowsocks|Server: Failed to write response: ", err)
return
}
defer responseWriter.Release()
if payload, err := ray.InboundOutput().Read(); err == nil {
responseWriter.Write(payload)
bufferedWriter.SetCached(false)
if err := buf.PipeUntilEOF(ray.InboundOutput(), responseWriter); err != nil {
log.Info("Shadowsocks|Server: Failed to transport all TCP response: ", err)
}
}
}()
if err := buf.PipeUntilEOF(bodyReader, ray.InboundInput()); err != nil {
log.Info("Shadowsocks|Server: Failed to transport all TCP request: ", err)
}
ray.InboundInput().Close()
writeFinish.Lock()
}