osdp/reply/
com.rs

1//! `osdp_COM` (`0x54`) — communications configuration report.
2//!
3//! # Spec: §7.13
4//!
5//! Body is 5 bytes: `address (1) + baud (4 LE)` — same layout as
6//! `osdp_COMSET`.
7
8use crate::error::Error;
9use crate::payload_util::require_exact_len;
10use alloc::vec::Vec;
11
12/// `osdp_COM` body.
13#[derive(Debug, Clone, Copy, PartialEq, Eq)]
14pub struct Com {
15    /// PD's address.
16    pub address: u8,
17    /// PD's baud rate.
18    pub baud: u32,
19}
20
21impl Com {
22    /// Encode.
23    pub fn encode(&self) -> Result<Vec<u8>, Error> {
24        let mut out = Vec::with_capacity(5);
25        out.push(self.address);
26        out.extend_from_slice(&self.baud.to_le_bytes());
27        Ok(out)
28    }
29
30    /// Decode.
31    pub fn decode(data: &[u8]) -> Result<Self, Error> {
32        require_exact_len(data, 5, 0x54)?;
33        Ok(Self {
34            address: data[0],
35            baud: u32::from_le_bytes([data[1], data[2], data[3], data[4]]),
36        })
37    }
38}
39
40#[cfg(test)]
41mod tests {
42    use super::*;
43
44    #[test]
45    fn roundtrip() {
46        let body = Com {
47            address: 0x05,
48            baud: 9600,
49        };
50        let bytes = body.encode().unwrap();
51        assert_eq!(bytes, [0x05, 0x80, 0x25, 0x00, 0x00]);
52        assert_eq!(Com::decode(&bytes).unwrap(), body);
53    }
54
55    #[test]
56    fn decode_rejects_wrong_length() {
57        assert!(matches!(
58            Com::decode(&[0; 4]),
59            Err(Error::PayloadLength { code: 0x54, .. })
60        ));
61    }
62}
osdp/reply/com.rs

osdp/reply/
com.rs
