Enum ErrorKind

#[non_exhaustive]
pub enum ErrorKind {
    Message(&'static str),
    Msg(String),
    Forward(ForwardData),
    ForwardNS(Arc<[ForwardNSData]>),
    Io(Error),
    Proto(ProtoError),
    Resolve(ResolveError),
    Timeout,
    RecursionLimitExceeded {
        count: usize,
    },
}

The error kind for errors that get returned in the crate

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Message(&'static str)

An error with an arbitrary message, referenced as &’static str

Msg(String)

An error with an arbitrary message, stored as String

Forward(ForwardData)

Upstream DNS authority returned a Referral to another nameserver in the form of an SOA record

ForwardNS(Arc<[ForwardNSData]>)

Upstream DNS authority returned a referral to another set of nameservers in the form of additional NS records.

Io(Error)

An error got returned from IO

Proto(ProtoError)

An error got returned by the hickory-proto crate

Resolve(ResolveError)

An error got returned by the hickory-proto crate

Timeout

A request timed out

RecursionLimitExceeded

Could not fetch all records because a recursion limit was exceeded

Fields

count: usize

Number of queries that were made

Implementations

impl ErrorKind

pub fn is_message(&self) -> bool

Returns true if this is a ErrorKind::Message, otherwise false

pub fn as_message_mut(&mut self) -> Option<&mut &'static str>

Optionally returns mutable references to the inner fields if this is a ErrorKind::Message, otherwise None

pub fn as_message(&self) -> Option<&&'static str>

Optionally returns references to the inner fields if this is a ErrorKind::Message, otherwise None

pub fn into_message(self) -> Result<&'static str, Self>

Returns the inner fields if this is a ErrorKind::Message, otherwise returns back the enum in the Err case of the result

pub fn is_msg(&self) -> bool

Returns true if this is a ErrorKind::Msg, otherwise false

pub fn as_msg_mut(&mut self) -> Option<&mut String>

Optionally returns mutable references to the inner fields if this is a ErrorKind::Msg, otherwise None

pub fn as_msg(&self) -> Option<&String>

Optionally returns references to the inner fields if this is a ErrorKind::Msg, otherwise None

pub fn into_msg(self) -> Result<String, Self>

Returns the inner fields if this is a ErrorKind::Msg, otherwise returns back the enum in the Err case of the result

pub fn is_forward(&self) -> bool

Returns true if this is a ErrorKind::Forward, otherwise false

pub fn as_forward_mut(&mut self) -> Option<&mut ForwardData>

Optionally returns mutable references to the inner fields if this is a ErrorKind::Forward, otherwise None

pub fn as_forward(&self) -> Option<&ForwardData>

Optionally returns references to the inner fields if this is a ErrorKind::Forward, otherwise None

pub fn into_forward(self) -> Result<ForwardData, Self>

Returns the inner fields if this is a ErrorKind::Forward, otherwise returns back the enum in the Err case of the result

pub fn is_forward_ns(&self) -> bool

Returns true if this is a ErrorKind::ForwardNS, otherwise false

pub fn as_forward_ns_mut(&mut self) -> Option<&mut Arc<[ForwardNSData]>>

Optionally returns mutable references to the inner fields if this is a ErrorKind::ForwardNS, otherwise None

pub fn as_forward_ns(&self) -> Option<&Arc<[ForwardNSData]>>

Optionally returns references to the inner fields if this is a ErrorKind::ForwardNS, otherwise None

pub fn into_forward_ns(self) -> Result<Arc<[ForwardNSData]>, Self>

Returns the inner fields if this is a ErrorKind::ForwardNS, otherwise returns back the enum in the Err case of the result

pub fn is_io(&self) -> bool

Returns true if this is a ErrorKind::Io, otherwise false

pub fn as_io_mut(&mut self) -> Option<&mut Error>

Optionally returns mutable references to the inner fields if this is a ErrorKind::Io, otherwise None

pub fn as_io(&self) -> Option<&Error>

Optionally returns references to the inner fields if this is a ErrorKind::Io, otherwise None

pub fn into_io(self) -> Result<Error, Self>

Returns the inner fields if this is a ErrorKind::Io, otherwise returns back the enum in the Err case of the result

pub fn is_proto(&self) -> bool

Returns true if this is a ErrorKind::Proto, otherwise false

pub fn as_proto_mut(&mut self) -> Option<&mut ProtoError>

Optionally returns mutable references to the inner fields if this is a ErrorKind::Proto, otherwise None

pub fn as_proto(&self) -> Option<&ProtoError>

Optionally returns references to the inner fields if this is a ErrorKind::Proto, otherwise None

pub fn into_proto(self) -> Result<ProtoError, Self>

Returns the inner fields if this is a ErrorKind::Proto, otherwise returns back the enum in the Err case of the result

pub fn is_resolve(&self) -> bool

Returns true if this is a ErrorKind::Resolve, otherwise false

pub fn as_resolve_mut(&mut self) -> Option<&mut ResolveError>

Optionally returns mutable references to the inner fields if this is a ErrorKind::Resolve, otherwise None

pub fn as_resolve(&self) -> Option<&ResolveError>

Optionally returns references to the inner fields if this is a ErrorKind::Resolve, otherwise None

pub fn into_resolve(self) -> Result<ResolveError, Self>

Returns the inner fields if this is a ErrorKind::Resolve, otherwise returns back the enum in the Err case of the result

pub fn is_timeout(&self) -> bool

Returns true if this is a ErrorKind::Timeout, otherwise false

pub fn is_recursion_limit_exceeded(&self) -> bool

Returns true if this is a ErrorKind::RecursionLimitExceeded, otherwise false

pub fn as_recursion_limit_exceeded_mut(&mut self) -> Option<&mut usize>

Optionally returns mutable references to the inner fields if this is a ErrorKind::RecursionLimitExceeded, otherwise None

pub fn as_recursion_limit_exceeded(&self) -> Option<&usize>

Optionally returns references to the inner fields if this is a ErrorKind::RecursionLimitExceeded, otherwise None

pub fn into_recursion_limit_exceeded(self) -> Result<usize, Self>

Returns the inner fields if this is a ErrorKind::RecursionLimitExceeded, otherwise returns back the enum in the Err case of the result

Trait Implementations

impl Clone for ErrorKind

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Display for ErrorKind

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

Formats the value using the given formatter.

impl Error for ErrorKind

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 ErrorKind

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<ProtoError> for ErrorKind

fn from(source: ProtoError) -> Self

Converts to this type from the input type.