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use super::StreamId;
use bytes::BufMut;
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub struct Head {
kind: Kind,
flag: u8,
stream_id: StreamId,
}
#[repr(u8)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
pub enum Kind {
Data = 0,
Headers = 1,
Priority = 2,
Reset = 3,
Settings = 4,
PushPromise = 5,
Ping = 6,
GoAway = 7,
WindowUpdate = 8,
Continuation = 9,
Unknown,
}
impl Head {
pub fn new(kind: Kind, flag: u8, stream_id: StreamId) -> Head {
Head {
kind,
flag,
stream_id,
}
}
pub fn parse(header: &[u8]) -> Head {
let (stream_id, _) = StreamId::parse(&header[5..]);
Head {
kind: Kind::new(header[3]),
flag: header[4],
stream_id,
}
}
pub fn stream_id(&self) -> StreamId {
self.stream_id
}
pub fn kind(&self) -> Kind {
self.kind
}
pub fn flag(&self) -> u8 {
self.flag
}
pub fn encode_len(&self) -> usize {
super::HEADER_LEN
}
pub fn encode<T: BufMut>(&self, payload_len: usize, dst: &mut T) {
debug_assert!(self.encode_len() <= dst.remaining_mut());
dst.put_uint(payload_len as u64, 3);
dst.put_u8(self.kind as u8);
dst.put_u8(self.flag);
dst.put_u32(self.stream_id.into());
}
}
impl Kind {
pub fn new(byte: u8) -> Kind {
match byte {
0 => Kind::Data,
1 => Kind::Headers,
2 => Kind::Priority,
3 => Kind::Reset,
4 => Kind::Settings,
5 => Kind::PushPromise,
6 => Kind::Ping,
7 => Kind::GoAway,
8 => Kind::WindowUpdate,
9 => Kind::Continuation,
_ => Kind::Unknown,
}
}
}