Move weave packet to common location b/t generator and receiver

components/proximity_auth/ble/bluetooth_low_energy_weave_packet_generator.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATOR_H_
 #define COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATOR_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
+#include "components/proximity_auth/ble/bluetooth_low_energy_weave_defines.h"
 #include "build/build_config.h"
 
 namespace proximity_auth {
+namespace weave {
+
 // Generates the messages sent using the uWeave protocol.
 class BluetoothLowEnergyWeavePacketGenerator {
  public:
   class Factory {
    public:
     static std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator>
     NewInstance();
 
     // Exposed for testing.
     static void SetInstanceForTesting(Factory* factory);
 
    protected:
     // Exposed for testing.
     virtual std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator>
     BuildInstance();
 
    private:
     static Factory* factory_instance_;
   };
 
-  // Determine whether a packet is a control packet or a data packet.
-  enum PacketType { DATA = 0x00, CONTROL = 0x01 };
-
-  // Identify the action intended by the control packet.
-  enum ControlCommand {
-    CONNECTION_REQUEST = 0x00,
-    CONNECTION_RESPONSE = 0x01,
-    CONNECTION_CLOSE = 0x02
-  };
-
-  // Sent with the ConnectionClose control packet.
-  // Identify why the client/server wished to close the connection.
-  enum ReasonForClose {
-    CLOSE_WITHOUT_ERROR = 0x00,
-    UNKNOWN_ERROR = 0x01,
-    NO_COMMON_VERSION_SUPPORTED = 0x02,
-    RECEIVED_PACKET_OUT_OF_SEQUENCE = 0x03,
-    APPLICATION_ERROR = 0x80
-  };
-
-  typedef std::vector<uint8_t> Packet;
-
   Packet CreateConnectionRequest();
   Packet CreateConnectionResponse();
   Packet CreateConnectionClose(ReasonForClose reason_for_close);
 
   // Packet size must be greater than or equal to 20.
-  void SetMaxPacketSize(uint32_t size);
+  void SetMaxPacketSize(uint16_t size);
 
   // Will crash if message is empty.
   std::vector<Packet> EncodeDataMessage(std::string message);
 
  protected:
   BluetoothLowEnergyWeavePacketGenerator();
 
  private:
   void SetShortField(uint32_t byte_offset, uint16_t val, Packet* packet);
   void SetPacketTypeBit(PacketType val, Packet* packet);
   void SetControlCommand(ControlCommand val, Packet* packet);
   void SetPacketCounter(Packet* packet);
   void SetDataFirstBit(Packet* packet);
   void SetDataLastBit(Packet* packet);
 
   // The default max packet length is 20 unless SetDataPacketLength() is called
   // and specified otherwise.
-  uint32_t max_packet_size_;
+  uint16_t max_packet_size_;
 
   // Counter for the number of packets sent, starting at 0.
-  uint32_t next_packet_counter_;
+  uint8_t next_packet_counter_;
 };
 
+}  // namespace weave
+
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATOR_H_