ace-uds 0.3.1

UDS typed message layer implementing ISO 14229-1.
Documentation 
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

use crate::UdsError;
use ace_macros::FrameCodec;

#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, FrameCodec)]
#[frame(error = UdsError)]
pub struct WriteMemoryByAddressRequest<'a> {
    pub address_and_length_format_identifier: u8,
    #[frame(
        length = "(address_and_length_format_identifier & 0x0F) as usize",
        bytes
    )]
    pub memory_address: &'a [u8],
    #[frame(length = "(address_and_length_format_identifier >> 4) as usize", bytes)]
    pub memory_size: &'a [u8],
    #[frame(read_all, bytes)]
    pub data_record: &'a [u8],
}

#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, FrameCodec)]
#[frame(error = UdsError)]
pub struct WriteMemoryByAddressResponse<'a> {
    pub address_and_length_format_identifier: u8,
    #[frame(
        length = "(address_and_length_format_identifier & 0x0F) as usize",
        bytes
    )]
    pub memory_address: &'a [u8],
    #[frame(length = "(address_and_length_format_identifier >> 4) as usize", bytes)]
    pub memory_size: &'a [u8],
}

#[cfg(test)]
mod tests {
    use super::*;
    use ace_core::codec::{decode_from_slice, FrameWrite};

    #[cfg(feature = "alloc")]
    use alloc::borrow::ToOwned;
    #[cfg(feature = "alloc")]
    use alloc::vec;

    // address_and_length_format_identifier = 0x12:
    //   low nibble  = 2 → memory_address is 2 bytes
    //   high nibble = 1 → memory_size    is 1 byte
    //   remainder        → data_record
    const REQUEST_FRAME: &[u8] = &[0x12, 0xAA, 0xBB, 0x04, 0xDE, 0xAD, 0xBE, 0xEF];

    // address_and_length_format_identifier = 0x12:
    //   low nibble  = 2 → memory_address is 2 bytes
    //   high nibble = 1 → memory_size    is 1 byte
    const RESPONSE_FRAME: &[u8] = &[0x12, 0xAA, 0xBB, 0x04];

    #[test]
    fn request_decode() {
        let req: WriteMemoryByAddressRequest = decode_from_slice(REQUEST_FRAME).unwrap();
        assert_eq!(req.address_and_length_format_identifier, 0x12);
        assert_eq!(req.memory_address, &[0xAA, 0xBB]);
        assert_eq!(req.memory_size, &[0x04]);
        assert_eq!(req.data_record, &[0xDE, 0xAD, 0xBE, 0xEF]);
    }

    #[test]
    fn request_encode_roundtrip() {
        let req: WriteMemoryByAddressRequest = decode_from_slice(REQUEST_FRAME).unwrap();
        let mut buf = [0u8; 64];
        req.encode(&mut buf.as_mut()).unwrap();
        assert_eq!(&buf[..REQUEST_FRAME.len()], REQUEST_FRAME);
    }

    #[test]
    fn response_decode() {
        let resp: WriteMemoryByAddressResponse = decode_from_slice(RESPONSE_FRAME).unwrap();
        assert_eq!(resp.address_and_length_format_identifier, 0x12);
        assert_eq!(resp.memory_address, &[0xAA, 0xBB]);
        assert_eq!(resp.memory_size, &[0x04]);
    }

    #[test]
    fn response_encode_roundtrip() {
        let resp: WriteMemoryByAddressResponse = decode_from_slice(RESPONSE_FRAME).unwrap();
        let mut buf = [0u8; 64];
        resp.encode(&mut buf.as_mut()).unwrap();
        assert_eq!(&buf[..RESPONSE_FRAME.len()], RESPONSE_FRAME);
    }

    #[test]
    fn request_truncated_address() {
        // claims 3 address bytes but only 2 present
        let bad: &[u8] = &[0x13, 0xAA, 0xBB];
        let result = decode_from_slice::<WriteMemoryByAddressRequest>(bad);
        assert!(result.is_err());
    }

    #[test]
    fn request_truncated_size() {
        // claims 2 size bytes but only 1 present after address
        let bad: &[u8] = &[0x22, 0xAA, 0xBB, 0x04];
        let result = decode_from_slice::<WriteMemoryByAddressRequest>(bad);
        assert!(result.is_err());
    }

    #[test]
    fn response_truncated() {
        // claims 2 address bytes but only 1 present
        let bad: &[u8] = &[0x12, 0xAA];
        let result = decode_from_slice::<WriteMemoryByAddressResponse>(bad);
        assert!(result.is_err());
    }

    #[cfg(feature = "alloc")]
    #[test]
    fn request_to_owned() {
        let req: WriteMemoryByAddressRequest = decode_from_slice(REQUEST_FRAME).unwrap();
        let owned = req.to_owned();
        assert_eq!(owned.address_and_length_format_identifier, 0x12);
        assert_eq!(owned.memory_address, vec![0xAA, 0xBB]);
        assert_eq!(owned.memory_size, vec![0x04]);
        assert_eq!(owned.data_record, vec![0xDE, 0xAD, 0xBE, 0xEF]);
    }

    #[cfg(feature = "alloc")]
    #[test]
    fn response_to_owned() {
        let resp: WriteMemoryByAddressResponse = decode_from_slice(RESPONSE_FRAME).unwrap();
        let owned = resp.to_owned();
        assert_eq!(owned.address_and_length_format_identifier, 0x12);
        assert_eq!(owned.memory_address, vec![0xAA, 0xBB]);
        assert_eq!(owned.memory_size, vec![0x04]);
    }

    #[cfg(feature = "alloc")]
    #[test]
    fn owned_request_encode_roundtrip() {
        let owned: WriteMemoryByAddressRequestOwned = decode_from_slice(REQUEST_FRAME).unwrap();
        let mut buf = [0u8; 64];
        owned.encode(&mut buf.as_mut()).unwrap();
        assert_eq!(&buf[..REQUEST_FRAME.len()], REQUEST_FRAME);
    }

    #[cfg(feature = "alloc")]
    #[test]
    fn owned_response_encode_roundtrip() {
        let owned: WriteMemoryByAddressResponseOwned = decode_from_slice(RESPONSE_FRAME).unwrap();
        let mut buf = [0u8; 64];
        owned.encode(&mut buf.as_mut()).unwrap();
        assert_eq!(&buf[..RESPONSE_FRAME.len()], RESPONSE_FRAME);
    }
}