Enum ConnError 

pub enum ConnError {
    Io(Error),
    Protocol(String),
    ReceiptTimeout(String),
    ServerRejected(ServerError),
}

Errors returned by Connection operations.

Variants

Io(Error)

I/O-level error

Protocol(String)

Protocol-level error

ReceiptTimeout(String)

Receipt timeout error

ServerRejected(ServerError)

Server rejected the connection (e.g., authentication failure)

This error is returned when the server sends an ERROR frame in response to the CONNECT frame. Common causes include invalid credentials, unauthorized access, or broker configuration issues.

Trait Implementations

impl Debug for ConnError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ConnError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for ConnError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for ConnError

fn from(source: Error) -> Self

Converts to this type from the input type.