mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-16 15:36:12 -04:00
Janusz Sobczak
f643f7a466
New features: * Smart Audio Source Switching. * Fast Pair for BLE-only devices. * Two byte salt size for improved security. Other changes: * Added optional encryption modules based on mbedtls. * Fixed build issues. * More verbose and readable logs.
102 lines
3.5 KiB
C
102 lines
3.5 KiB
C
// Copyright 2022 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef NEARBY_MESSAGE_STREAM_H
|
|
#define NEARBY_MESSAGE_STREAM_H
|
|
|
|
// clang-format off
|
|
#include "nearby_config.h"
|
|
// clang-format on
|
|
|
|
#include "nearby.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
// Message group and codes for ACK and NACK messages
|
|
#define ACKNOWLEDGEMENT_GROUP 0xFF
|
|
#define ACK_CODE 1
|
|
#define NACK_CODE 2
|
|
|
|
#define FAIL_REASON_INVALID_MAC 3
|
|
#define FAIL_REASON_REDUNDANT_DEVICE_ACTION 4
|
|
|
|
// Message sent and received over the message stream
|
|
// See: https://developers.google.com/nearby/fast-pair/spec#MessageStream
|
|
typedef struct {
|
|
uint8_t message_group;
|
|
uint8_t message_code;
|
|
// |data| length in native encoding
|
|
uint16_t length;
|
|
// message payload in big endian encoding
|
|
uint8_t* data;
|
|
} nearby_message_stream_Message;
|
|
|
|
// State and configuration of message stream parser
|
|
typedef struct {
|
|
// Callback triggered when a complete message is read from the input stream
|
|
void (*on_message_received)(uint64_t peer_address,
|
|
nearby_message_stream_Message* message);
|
|
// |peer_address| that is passed to |on_message_received|
|
|
uint64_t peer_address;
|
|
// Length of |buffer|
|
|
size_t length;
|
|
// The buffer used for storing an incoming message. The parser uses the buffer
|
|
// to store nearby_message_stream_Metadata, so not all of the space is
|
|
// available for message payload
|
|
uint8_t* buffer;
|
|
} nearby_message_stream_State;
|
|
|
|
typedef struct {
|
|
nearby_message_stream_Message message;
|
|
uint16_t bytes_read;
|
|
} nearby_message_stream_Metadata;
|
|
|
|
#if NEARBY_FP_MESSAGE_STREAM
|
|
// Initializes the parser
|
|
void nearby_message_stream_Init(const nearby_message_stream_State* state);
|
|
|
|
// Reads and deserializes data from an input stream. It is OK to pass in
|
|
// incomplete packets. When the parses reads a complete message, it calls
|
|
// |on_message_received|. If the message payload is too big to fit the buffer -
|
|
// bigger than GetMaxPayloadSize(), then the payload is truncated.
|
|
void nearby_message_stream_Read(const nearby_message_stream_State* state,
|
|
const uint8_t* data, size_t length);
|
|
|
|
// Serializes and sends |message| out using nearby_platform_SendMessageStream()
|
|
nearby_platform_status nearby_message_stream_Send(
|
|
uint64_t peer_address, const nearby_message_stream_Message* message);
|
|
|
|
// Sends out an ACK message for a received |message|. Note that not all messages
|
|
// require an ACK
|
|
nearby_platform_status nearby_message_stream_SendAck(
|
|
uint64_t peer_address, const nearby_message_stream_Message* message);
|
|
|
|
// Sends out a NACK message for a received |message| with |fail_reason| reason.
|
|
nearby_platform_status nearby_message_stream_SendNack(
|
|
uint64_t peer_address, const nearby_message_stream_Message* message,
|
|
uint8_t fail_reason);
|
|
|
|
// Returns the maximum message payload size
|
|
uint16_t nearby_message_stream_GetMaxPayloadSize(
|
|
const nearby_message_stream_State* state);
|
|
|
|
#endif /* NEARBY_FP_MESSAGE_STREAM */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // NEARBY_MESSAGE_STREAM_H
|