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| author | Szczepan Zalega <szczepan@nitrokey.com> | 2016-10-31 19:03:30 +0100 |
|---|---|---|
| committer | Szczepan Zalega <szczepan@nitrokey.com> | 2016-11-26 18:56:27 +0100 |
| commit | c346ff180244de682e78f49783eab9b296c79de6 (patch) | |
| tree | e4375ac47275e7181d9a3fc1ba111e3c2ec25601 /include/device_proto.h | |
| parent | ca130e790ecc4e4502eb39e1ab550348eae9bc54 (diff) | |
| download | libnitrokey-c346ff180244de682e78f49783eab9b296c79de6.tar.gz libnitrokey-c346ff180244de682e78f49783eab9b296c79de6.tar.bz2 | |
Code refactoring - named magic numbers (2)
Signed-off-by: Szczepan Zalega <szczepan@nitrokey.com>
Diffstat (limited to 'include/device_proto.h')
| -rw-r--r-- | include/device_proto.h | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/include/device_proto.h b/include/device_proto.h index 6bcbcb0..187d25c 100644 --- a/include/device_proto.h +++ b/include/device_proto.h @@ -90,12 +90,19 @@ namespace nitrokey { * command_id member in incoming HIDReport structure carries the command * type last used. */ - template<CommandID cmd_id, typename ResponsePayload> - struct DeviceResponse { - static constexpr auto storage_status_absolute_address = 21; //magic number from firmware + namespace DeviceResponseConstants{ + //magic numbers from firmware + static constexpr auto storage_status_absolute_address = 21; + static constexpr auto storage_data_absolute_address = storage_status_absolute_address + 5; static constexpr auto header_size = 8; //from _zero to last_command_status inclusive static constexpr auto footer_size = 4; //crc - static constexpr auto boiler_size = header_size + footer_size; + static constexpr auto wrapping_size = header_size + footer_size; + } + + template<CommandID cmd_id, typename ResponsePayload> + struct DeviceResponse { + static constexpr auto storage_status_padding_size = + DeviceResponseConstants::storage_status_absolute_address - DeviceResponseConstants::header_size; uint8_t _zero; uint8_t device_status; @@ -104,10 +111,10 @@ namespace nitrokey { uint8_t last_command_status; union { - uint8_t _padding[HID_REPORT_SIZE - boiler_size]; + uint8_t _padding[HID_REPORT_SIZE - DeviceResponseConstants::wrapping_size]; ResponsePayload payload; struct { - uint8_t _storage_status_padding[storage_status_absolute_address - header_size]; + uint8_t _storage_status_padding[storage_status_padding_size]; uint8_t command_counter; uint8_t command_id; uint8_t device_status; //@see stick20::device_status |