Diff: src/NormalOperationWindow.hpp

Revision:

16:a004191a79ab

Parent:

13:6a6225690c2e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/NormalOperationWindow.hpp	Thu Oct 03 11:40:13 2019 -0500
@@ -0,0 +1,124 @@
+/*******************************************************************************
+* Copyright (C) Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+*******************************************************************************/
+
+#ifndef NORMALOPERATIONWINDOW_HPP
+#define NORMALOPERATIONWINDOW_HPP
+
+#include <memory>
+#include <vector>
+#include <MaximInterfaceCore/array.hpp>
+#include <mbed-os/features/netsocket/TCPSocket.h>
+#include <rapidjson/document.h>
+#include "Button.hpp"
+#include "SensorNode.hpp"
+#include "Window.hpp"
+
+/// @brief
+/// Handles normal operation of the demo including displaying status information
+/// and processing commands from the server.
+class NormalOperationWindow : public Window {
+public:
+  /// @param socket
+  /// Socket that has been initialized by connecting to the web server. This
+  /// must be a heap allocated object that NormalOperationWindow will take
+  /// ownership of.
+  explicit NormalOperationWindow(std::auto_ptr<TCPSocket> & socket);
+
+protected:
+  virtual void resized();
+  virtual void updated();
+  virtual void doRender(Bitmap & bitmap, int xOffset, int yOffset) const;
+  virtual bool doProcessKey(Key key);
+
+private:
+  enum Result {
+    NoChange,      // Windows not changed; No redraw required.
+    WindowsChanged // Windows have changed; Redraw is required.
+  };
+
+  std::auto_ptr<TCPSocket> socket;
+
+  // Socket receive buffer. Must be large enough to hold the largest command.
+  char recvBuf[1280];
+
+  // Challenge sent to the server with a command response to sign the next
+  // command against.
+  MaximInterfaceCore::array<uint8_t, 32> commandChallenge;
+  bool sendChallenge;
+
+  // Device status information.
+  bool validSignature;
+  SensorNode::State lastSensorNodeState;
+  double lastObjectTemp;
+  double lastAmbientTemp;
+
+  Button validSignatureButton;
+  Button showWebIdButton;
+
+  // Button event handlers.
+  void showWebId(Button *);
+  void toggleValidSignature(Button *);
+
+  // Creates a new command challenge, and adds it to an existing JSON document.
+  MaximInterfaceCore::Result<void>
+  addCommandChallenge(rapidjson::Document & document);
+
+  // Adds signature information to an existing JSON document.
+  static MaximInterfaceCore::Result<void>
+  signData(rapidjson::Document & document, bool validSignature,
+           const std::vector<uint8_t> & challenge);
+
+  // Finalizes a command response to the server by adding the next command
+  // challenge and signing the data.
+  MaximInterfaceCore::Result<void>
+  finalizeResponse(rapidjson::Document & document, bool validSignature,
+                   const std::vector<uint8_t> & responseChallenge);
+
+  // Parse and verify a signed JSON string.
+  MaximInterfaceCore::Result<void>
+  verifySignedData(rapidjson::Document & signedData,
+                   MaximInterfaceCore::span<const char> verifyDataIn);
+
+  // Send a JSON document to the server.
+  void sendJson(const rapidjson::Value & document);
+
+  // Send a message to the server message log.
+  void sendMessage(const char * message);
+
+  Result processReceivedData(size_t recvBufSize);
+  Result sendStatus(const std::vector<uint8_t> & responseChallenge);
+  Result sendObjectTemp(const std::vector<uint8_t> & responseChallenge);
+  Result sendAmbientTemp(const std::vector<uint8_t> & responseChallenge);
+  void displayImage(const std::vector<uint8_t> & imageData);
+};
+
+#endif