func (v *Server) handlerUDPPayload(ctx context.Context, conn internet.Connection) error {
source := proxy.SourceFromContext(ctx)
reader := buf.NewReader(conn)
for {
payload, err := reader.Read()
if err != nil {
break
}
request, data, err := DecodeUDPPacket(v.user, payload)
if err != nil {
log.Info("Shadowsocks|Server: Skipping invalid UDP packet from: ", source, ": ", err)
log.Access(source, "", log.AccessRejected, err)
payload.Release()
continue
}
if request.Option.Has(RequestOptionOneTimeAuth) && v.account.OneTimeAuth == Account_Disabled {
log.Info("Shadowsocks|Server: Client payload enables OTA but server doesn't allow it.")
payload.Release()
continue
}
if !request.Option.Has(RequestOptionOneTimeAuth) && v.account.OneTimeAuth == Account_Enabled {
log.Info("Shadowsocks|Server: Client payload disables OTA but server forces it.")
payload.Release()
continue
}
dest := request.Destination()
log.Access(source, dest, log.AccessAccepted, "")
log.Info("Shadowsocks|Server: Tunnelling request to ", dest)
ctx = protocol.ContextWithUser(ctx, request.User)
v.udpServer.Dispatch(ctx, dest, data, func(payload *buf.Buffer) {
defer payload.Release()
data, err := EncodeUDPPacket(request, payload)
if err != nil {
log.Warning("Shadowsocks|Server: Failed to encode UDP packet: ", err)
return
}
defer data.Release()
conn.Write(data.Bytes())
})
}
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
}