57 lines
1.5 KiB
Rust
57 lines
1.5 KiB
Rust
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use std::{
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error::Error as StdError,
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io::{self, ErrorKind},
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};
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/// KCP protocol errors
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#[derive(Debug, thiserror::Error)]
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pub enum Error {
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#[error("conv inconsistent, expected {0}, found {1}")]
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ConvInconsistent(u32, u32),
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#[error("invalid mtu {0}")]
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InvalidMtu(usize),
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#[error("invalid segment size {0}")]
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InvalidSegmentSize(usize),
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#[error("invalid segment data size, expected {0}, found {1}")]
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InvalidSegmentDataSize(usize, usize),
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#[error("{0}")]
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IoError(
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#[from]
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#[source]
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io::Error,
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),
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#[error("need to call update() once")]
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NeedUpdate,
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#[error("recv queue is empty")]
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RecvQueueEmpty,
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#[error("expecting fragment")]
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ExpectingFragment,
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#[error("command {0} is not supported")]
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UnsupportedCmd(u8),
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#[error("user's send buffer is too big")]
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UserBufTooBig,
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#[error("user's recv buffer is too small")]
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UserBufTooSmall,
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#[error("token mismatch, expected {0}, found {1}")]
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TokenMismatch(u32, u32),
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}
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fn make_io_error<T>(kind: ErrorKind, msg: T) -> io::Error
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where
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T: Into<Box<dyn StdError + Send + Sync>>,
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{
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io::Error::new(kind, msg)
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}
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impl From<Error> for io::Error {
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fn from(err: Error) -> Self {
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let kind = match err {
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Error::IoError(err) => return err,
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Error::RecvQueueEmpty | Error::ExpectingFragment => ErrorKind::WouldBlock,
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_ => ErrorKind::Other,
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};
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make_io_error(kind, err)
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}
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}
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