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//! Declare an error type for tor_socksproto
use thiserror::Error;
/// An error that occurs while negotiating a SOCKS handshake.
#[derive(Error, Debug)]
#[non_exhaustive]
pub enum Error {
/// Tried to handle a message what wasn't complete: try again.
#[error("Message truncated; need to wait for more")]
Truncated,
/// The SOCKS client didn't implement SOCKS correctly.
///
/// (Or, more likely, we didn't account for its behavior.)
#[error("SOCKS protocol syntax violation")]
Syntax,
/// The SOCKS client declared a SOCKS version number that isn't
/// one we support.
///
/// In all likelihood, this is somebody trying to use the port for
/// some protocol other than SOCKS.
#[error("Unrecognized SOCKS protocol version {0}")]
BadProtocol(u8),
/// The SOCKS client tried to use a SOCKS feature that we don't
/// support at all.
#[error("SOCKS feature not supported")]
NoSupport,
/// Tried to progress the SOCKS handshake when it was already
/// finished. This is a programming error.
#[error("SOCKS handshake was finished; no need to call this again")]
AlreadyFinished,
}
impl From<tor_bytes::Error> for Error {
fn from(e: tor_bytes::Error) -> Error {
use tor_bytes::Error as E;
match e {
E::Truncated => Error::Truncated,
_ => Error::Syntax,
}
}
}
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