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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATO
R_H_ | 5 #ifndef COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATO
R_H_ |
6 #define COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATO
R_H_ | 6 #define COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENERATO
R_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 #include <stdint.h> | 9 #include <stdint.h> |
10 | 10 |
11 #include <memory> | 11 #include <memory> |
12 #include <string> | 12 #include <string> |
13 #include <vector> | 13 #include <vector> |
14 | 14 |
| 15 #include "components/proximity_auth/ble/bluetooth_low_energy_weave_defines.h" |
15 #include "build/build_config.h" | 16 #include "build/build_config.h" |
16 | 17 |
17 namespace proximity_auth { | 18 namespace proximity_auth { |
| 19 namespace weave { |
| 20 |
18 // Generates the messages sent using the uWeave protocol. | 21 // Generates the messages sent using the uWeave protocol. |
19 class BluetoothLowEnergyWeavePacketGenerator { | 22 class BluetoothLowEnergyWeavePacketGenerator { |
20 public: | 23 public: |
21 class Factory { | 24 class Factory { |
22 public: | 25 public: |
23 static std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator> | 26 static std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator> |
24 NewInstance(); | 27 NewInstance(); |
25 | 28 |
26 // Exposed for testing. | 29 // Exposed for testing. |
27 static void SetInstanceForTesting(Factory* factory); | 30 static void SetInstanceForTesting(Factory* factory); |
28 | 31 |
29 protected: | 32 protected: |
30 // Exposed for testing. | 33 // Exposed for testing. |
31 virtual std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator> | 34 virtual std::unique_ptr<BluetoothLowEnergyWeavePacketGenerator> |
32 BuildInstance(); | 35 BuildInstance(); |
33 | 36 |
34 private: | 37 private: |
35 static Factory* factory_instance_; | 38 static Factory* factory_instance_; |
36 }; | 39 }; |
37 | 40 |
38 // Determine whether a packet is a control packet or a data packet. | |
39 enum PacketType { DATA = 0x00, CONTROL = 0x01 }; | |
40 | |
41 // Identify the action intended by the control packet. | |
42 enum ControlCommand { | |
43 CONNECTION_REQUEST = 0x00, | |
44 CONNECTION_RESPONSE = 0x01, | |
45 CONNECTION_CLOSE = 0x02 | |
46 }; | |
47 | |
48 // Sent with the ConnectionClose control packet. | |
49 // Identify why the client/server wished to close the connection. | |
50 enum ReasonForClose { | |
51 CLOSE_WITHOUT_ERROR = 0x00, | |
52 UNKNOWN_ERROR = 0x01, | |
53 NO_COMMON_VERSION_SUPPORTED = 0x02, | |
54 RECEIVED_PACKET_OUT_OF_SEQUENCE = 0x03, | |
55 APPLICATION_ERROR = 0x80 | |
56 }; | |
57 | |
58 typedef std::vector<uint8_t> Packet; | |
59 | |
60 Packet CreateConnectionRequest(); | 41 Packet CreateConnectionRequest(); |
61 Packet CreateConnectionResponse(); | 42 Packet CreateConnectionResponse(); |
62 Packet CreateConnectionClose(ReasonForClose reason_for_close); | 43 Packet CreateConnectionClose(ReasonForClose reason_for_close); |
63 | 44 |
64 // Packet size must be greater than or equal to 20. | 45 // Packet size must be greater than or equal to 20. |
65 void SetMaxPacketSize(uint32_t size); | 46 void SetMaxPacketSize(uint16_t size); |
66 | 47 |
67 // Will crash if message is empty. | 48 // Will crash if message is empty. |
68 std::vector<Packet> EncodeDataMessage(std::string message); | 49 std::vector<Packet> EncodeDataMessage(std::string message); |
69 | 50 |
70 protected: | 51 protected: |
71 BluetoothLowEnergyWeavePacketGenerator(); | 52 BluetoothLowEnergyWeavePacketGenerator(); |
72 | 53 |
73 private: | 54 private: |
74 void SetShortField(uint32_t byte_offset, uint16_t val, Packet* packet); | 55 void SetShortField(uint32_t byte_offset, uint16_t val, Packet* packet); |
75 void SetPacketTypeBit(PacketType val, Packet* packet); | 56 void SetPacketTypeBit(PacketType val, Packet* packet); |
76 void SetControlCommand(ControlCommand val, Packet* packet); | 57 void SetControlCommand(ControlCommand val, Packet* packet); |
77 void SetPacketCounter(Packet* packet); | 58 void SetPacketCounter(Packet* packet); |
78 void SetDataFirstBit(Packet* packet); | 59 void SetDataFirstBit(Packet* packet); |
79 void SetDataLastBit(Packet* packet); | 60 void SetDataLastBit(Packet* packet); |
80 | 61 |
81 // The default max packet length is 20 unless SetDataPacketLength() is called | 62 // The default max packet length is 20 unless SetDataPacketLength() is called |
82 // and specified otherwise. | 63 // and specified otherwise. |
83 uint32_t max_packet_size_; | 64 uint16_t max_packet_size_; |
84 | 65 |
85 // Counter for the number of packets sent, starting at 0. | 66 // Counter for the number of packets sent, starting at 0. |
86 uint32_t next_packet_counter_; | 67 uint8_t next_packet_counter_; |
87 }; | 68 }; |
88 | 69 |
| 70 } // namespace weave |
| 71 |
89 } // namespace proximity_auth | 72 } // namespace proximity_auth |
90 | 73 |
91 #endif // COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENER
ATOR_H_ | 74 #endif // COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_PACKET_GENER
ATOR_H_ |
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