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pub use crate::codec::EncoderError;
use crate::frame::{self, GoAway, Reason, StreamId};
use crate::stream::StreamRef;
#[derive(Debug, Copy, Clone, PartialEq, Eq, thiserror::Error)]
pub enum ConnectionError {
#[error("Go away: {0}")]
GoAway(Reason),
#[error("Unknown stream id in {0} frame")]
UnknownStream(&'static str),
#[error("Encoder error: {0}")]
Encoder(#[from] EncoderError),
#[error("Decoder error: {0}")]
Decoder(#[from] frame::FrameError),
#[error("{0:?} is closed")]
StreamClosed(StreamId),
#[error("An invalid stream identifier was provided")]
InvalidStreamId,
#[error("Unexpected setting ack received")]
UnexpectedSettingsAck,
#[error("Missing pseudo header {0:?}")]
MissingPseudo(&'static str),
#[error("Unexpected pseudo header {0:?}")]
UnexpectedPseudo(&'static str),
#[error("Window update value is zero")]
ZeroWindowUpdateValue,
#[error("Window value is overflowed")]
WindowValueOverflow,
#[error("Keep-alive timeout")]
KeepaliveTimeout,
}
impl ConnectionError {
pub fn to_goaway(&self) -> GoAway {
match self {
ConnectionError::GoAway(reason) => GoAway::new(*reason),
ConnectionError::Encoder(_) => {
GoAway::new(Reason::PROTOCOL_ERROR).set_data("error during frame encoding")
}
ConnectionError::Decoder(_) => {
GoAway::new(Reason::PROTOCOL_ERROR).set_data("error during frame decoding")
}
ConnectionError::MissingPseudo(s) => GoAway::new(Reason::PROTOCOL_ERROR)
.set_data(format!("Missing pseudo header {:?}", s)),
ConnectionError::UnexpectedPseudo(s) => GoAway::new(Reason::PROTOCOL_ERROR)
.set_data(format!("Unexpected pseudo header {:?}", s)),
ConnectionError::UnknownStream(_) => {
GoAway::new(Reason::PROTOCOL_ERROR).set_data("unknown stream")
}
ConnectionError::InvalidStreamId => GoAway::new(Reason::PROTOCOL_ERROR)
.set_data("An invalid stream identifier was provided"),
ConnectionError::StreamClosed(s) => {
GoAway::new(Reason::STREAM_CLOSED).set_data(format!("{:?} is closed", s))
}
ConnectionError::UnexpectedSettingsAck => {
GoAway::new(Reason::PROTOCOL_ERROR).set_data("received unexpected settings ack")
}
ConnectionError::ZeroWindowUpdateValue => GoAway::new(Reason::PROTOCOL_ERROR)
.set_data("zero value for window update frame is not allowed"),
ConnectionError::WindowValueOverflow => GoAway::new(Reason::FLOW_CONTROL_ERROR)
.set_data("updated value for window is overflowed"),
ConnectionError::KeepaliveTimeout => {
GoAway::new(Reason::NO_ERROR).set_data("keep-alive timeout")
}
}
}
}
#[derive(Debug, Clone, thiserror::Error)]
#[error("Stream error: {kind:?}")]
pub(crate) struct StreamErrorInner {
kind: StreamError,
stream: StreamRef,
}
impl StreamErrorInner {
pub(crate) fn new(stream: StreamRef, kind: StreamError) -> Self {
Self { kind, stream }
}
pub(crate) fn into_inner(self) -> (StreamRef, StreamError) {
(self.stream, self.kind)
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq, thiserror::Error)]
pub enum StreamError {
#[error("Stream in idle state: {0}")]
Idle(&'static str),
#[error("Stream is closed")]
Closed,
#[error("Window value is overflowed")]
WindowOverflowed,
#[error("Zero value for window")]
WindowZeroUpdateValue,
#[error("Trailers headers without end of stream flags")]
TrailersWithoutEos,
#[error("Invalid content length")]
InvalidContentLength,
#[error("Payload length does not match content-length header")]
WrongPayloadLength,
#[error("Non-empty payload for HEAD response")]
NonEmptyPayload,
#[error("Stream has been reset with {0}")]
Reset(Reason),
}
impl StreamError {
#[inline]
pub(crate) fn reason(&self) -> Reason {
match self {
StreamError::Idle(_) => Reason::PROTOCOL_ERROR,
StreamError::Closed => Reason::STREAM_CLOSED,
StreamError::WindowOverflowed => Reason::FLOW_CONTROL_ERROR,
StreamError::WindowZeroUpdateValue => Reason::PROTOCOL_ERROR,
StreamError::TrailersWithoutEos => Reason::PROTOCOL_ERROR,
StreamError::InvalidContentLength => Reason::PROTOCOL_ERROR,
StreamError::WrongPayloadLength => Reason::PROTOCOL_ERROR,
StreamError::NonEmptyPayload => Reason::PROTOCOL_ERROR,
StreamError::Reset(r) => *r,
}
}
}
#[derive(Debug, Clone, thiserror::Error)]
pub enum OperationError {
#[error("{0:?}")]
Stream(#[from] StreamError),
#[error("{0}")]
Connection(#[from] ConnectionError),
#[error("Cannot process operation for idle stream")]
Idle,
#[error("Cannot process operation for stream in payload state")]
Payload,
#[error("Stream is closed {0:?}")]
Closed(Option<Reason>),
#[error("Stream has been reset from the peer with {0}")]
RemoteReset(Reason),
#[error("Stream has been reset from local side with {0}")]
LocalReset(Reason),
#[error("The stream ID space is overflowed")]
OverflowedStreamId,
#[error("Connection is closed")]
Disconnected,
}