1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
pub mod bud_property;
pub mod extended_status_updated;
pub mod find_my_bud;
pub mod ids;
pub mod lock_touchpad;
pub mod mute_earbud;
pub mod response;
pub mod set_noise_reduction;
pub mod set_touchpad_option;
pub mod simple;
pub mod status_updated;
pub mod touch_updated;
pub mod touchpad_action;
pub mod voice_wakeup_listening_status;
use crate::utils::{self, byteutil, crc16};
pub const EOM: u8 = 221;
pub const BOM: u8 = 253;
pub struct Message {
data: Vec<u8>,
}
pub trait Payload {
fn get_id(&self) -> u8;
fn get_data(&self) -> Vec<u8> {
vec![]
}
fn is_response(&self) -> bool {
false
}
fn to_byte_array(&self) -> Vec<u8> {
let id = Self::get_id(&self);
let payload_data = Self::get_data(&self);
let payload_len = payload_data.len();
let i2 = payload_len + 3;
let i3 = i2 + 4;
let mut b_arr: Vec<u8> = vec![0; i3];
b_arr[0] = BOM;
b_arr[i3 - 1 as usize] = EOM;
let create_header = Self::create_header(self, i2 as i32);
b_arr[1] = create_header[0];
b_arr[2] = create_header[1];
let mut b_arr2: Vec<u8> = vec![0; i2];
b_arr2[0] = id;
utils::array::arraycopy(&payload_data, 0, &mut b_arr2, 1, payload_data.len());
let crc16_ccitt = crc16::crc16_ccitt(&b_arr2, b_arr2.len() - 1);
let barr2_len = b_arr2.len();
b_arr2[barr2_len - 2] = (crc16_ccitt & 255) as u8;
b_arr2[barr2_len - 1] = ((crc16_ccitt >> 8) & 255) as u8;
utils::array::arraycopy(&b_arr2, 0, &mut b_arr, 3, b_arr2.len());
b_arr
}
fn create_header(&self, i: i32) -> [u8; 2] {
let mut from_short = byteutil::from_short(i & 1023);
if self.is_response() {
from_short[1] = from_short[1] | 16;
}
from_short
}
}
impl Message {
pub fn new<I: Into<Vec<u8>>>(data: I) -> Message {
return Message { data: data.into() };
}
pub fn get_payload_length(&self) -> i32 {
self.get_u8() & 1023
}
pub fn is_fragment(&self) -> bool {
self.get_u8() & 8192 != 0
}
pub fn is_response(&self) -> bool {
(self.get_u8() & 4096) != 0
}
pub fn get_u8(&self) -> i32 {
(byteutil::to_u8(self.data[2]) << 8) + byteutil::to_u8(self.data[1])
}
pub fn get_payload_start_index() -> usize {
3
}
pub fn get_payload_bytes(&self) -> &[u8] {
&self.data[Self::get_payload_start_index() + 1..]
}
pub fn get_id(&self) -> u8 {
self.data[3]
}
fn check_crc(&self) -> bool {
if self.data.len() < 2 {
return false;
}
let mut arr: Vec<u8> = self.data.clone().into();
let l = arr.len();
let b = arr[arr.len() - 1];
arr[l - 1] = arr[arr.len() - 2];
arr[l - 2] = b;
true
}
}