Enum Error 

pub enum Error {
    CompletelyBusted,
    HeaderTooShort(u16),
    QuestionTooShort(u16),
    ResourceRecordTooShort(u16),
    ResourceRecordInvalid(u16),
    DomainTooShort(u16),
    DomainTooLong(u16),
    DomainPointerInvalid(u16),
    DomainLabelInvalid(u16),
}

Errors encountered when parsing a datagram. In all the errors which have a u16 parameter, that is the ID from the header - so that an error response can be sent.

Variants

CompletelyBusted

The datagram is not even 2 octets long, so it doesn’t even contain a valid ID. An error cannot even be sent back to the client in this case as, without an ID, it cannot be linked with the correct query.

HeaderTooShort(u16)

The header is missing one or more required fields.

QuestionTooShort(u16)

A question ends with an incomplete field.

ResourceRecordTooShort(u16)

A resource record ends with an incomplete field.

ResourceRecordInvalid(u16)

A resource record is the wrong format.

DomainTooShort(u16)

A domain is incomplete.

DomainTooLong(u16)

A domain is over 255 octets in size.

DomainPointerInvalid(u16)

A domain pointer points to or after the current record.

DomainLabelInvalid(u16)

A domain label is longer than 63 octets, but not a pointer.

Implementations

impl Error

pub fn id(self) -> Option<u16>

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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 Hash for Error

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Error

fn eq(&self, other: &Error) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Error

impl Eq for Error

impl StructuralPartialEq for Error