poster/codec/
pubrel.rs

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1use bytes::{Bytes, BytesMut};
2
3use crate::{
4    codec::ack::{AckRx, AckTx, AckTxBuilder, FixedHeader},
5    core::{
6        error::{ConversionError, InvalidValue},
7        utils::{ByteLen, Encode, PacketID, TryDecode},
8    },
9};
10
11/// Reason for PUBREL packet.
12///
13#[allow(missing_docs)]
14#[derive(Copy, Clone, Debug, PartialEq, Eq)]
15pub enum PubrelReason {
16    Success = 0x00,
17    PacketIdentifierNotFound = 0x92,
18}
19
20impl TryFrom<u8> for PubrelReason {
21    type Error = ConversionError;
22
23    fn try_from(val: u8) -> Result<Self, Self::Error> {
24        match val {
25            0x00 => Ok(PubrelReason::Success),
26            0x92 => Ok(PubrelReason::PacketIdentifierNotFound),
27            _ => Err(InvalidValue.into()),
28        }
29    }
30}
31
32impl Default for PubrelReason {
33    fn default() -> Self {
34        Self::Success
35    }
36}
37
38impl ByteLen for PubrelReason {
39    fn byte_len(&self) -> usize {
40        (*self as u8).byte_len()
41    }
42}
43
44impl TryDecode for PubrelReason {
45    type Error = ConversionError;
46
47    fn try_decode(bytes: Bytes) -> Result<Self, Self::Error> {
48        Self::try_from(u8::try_decode(bytes)?)
49    }
50}
51
52impl Encode for PubrelReason {
53    fn encode(&self, buf: &mut BytesMut) {
54        (*self as u8).encode(buf)
55    }
56}
57
58pub(crate) type PubrelRx = AckRx<PubrelReason>;
59
60impl PacketID for PubrelRx {
61    const PACKET_ID: u8 = 6;
62}
63
64impl FixedHeader for PubrelRx {
65    const FIXED_HDR: u8 = (Self::PACKET_ID << 4) | 0b0010;
66}
67
68pub(crate) type PubrelTx<'a> = AckTx<'a, PubrelReason>;
69
70impl<'a> PacketID for PubrelTx<'a> {
71    const PACKET_ID: u8 = 6;
72}
73
74impl<'a> FixedHeader for PubrelTx<'a> {
75    const FIXED_HDR: u8 = (Self::PACKET_ID << 4) | 0b0010;
76}
77
78pub(crate) type PubrelTxBuilder<'a> = AckTxBuilder<'a, PubrelReason>;
79
80#[cfg(test)]
81mod test {
82    use super::*;
83    use crate::codec::ack::test::*;
84
85    #[test]
86    fn from_bytes_0() {
87        from_bytes_impl::<PubrelReason>();
88    }
89
90    #[test]
91    fn from_bytes_1() {
92        from_bytes_short_impl::<PubrelReason>();
93    }
94
95    #[test]
96    fn to_bytes_0() {
97        to_bytes_impl::<PubrelReason>();
98    }
99
100    #[test]
101    fn to_bytes_1() {
102        to_bytes_short_impl::<PubrelReason>();
103    }
104}
poster/codec/pubrel.rs

poster/codec/
pubrel.rs
