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
//! Shared discriminator for the outer transport envelope.
use pim_core::PimError;
/// Identifies the type of payload inside a TransportFrame.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[repr(u8)]
pub enum FrameType {
/// Authenticated handshake message.
Handshake = 0x01,
/// Mesh data payload.
Data = 0x02,
/// Route advertisement payload.
RouteUpdate = 0x03,
/// Periodic heartbeat payload.
Heartbeat = 0x04,
/// Control-plane request or response payload.
Control = 0x05,
/// Packet fragment payload.
Fragment = 0x06,
}
impl FrameType {
/// Decode a raw frame-type tag from the wire.
pub fn from_u8(value: u8) -> Result<Self, PimError> {
match value {
0x01 => Ok(Self::Handshake),
0x02 => Ok(Self::Data),
0x03 => Ok(Self::RouteUpdate),
0x04 => Ok(Self::Heartbeat),
0x05 => Ok(Self::Control),
0x06 => Ok(Self::Fragment),
other => Err(PimError::Protocol(format!(
"unknown frame type: 0x{other:02x}"
))),
}
}
}