Enum DnsError 

pub enum DnsError {
    Timeout,
    ServerFailure,
    Refused,
    Malformed,
    NetworkError,
    InvalidInput,
}

Error variants for DNS query failures.

Each variant maps to a stable string code (see DnsError::code) that is preserved through the crate::Error pipeline via crate::Error::with_code. Use crate::Error::source_as::<DnsError> before the response is sent and crate::Error::error_code after.

Variants

Timeout

The DNS query exceeded the configured timeout.

ServerFailure

The DNS server returned a SERVFAIL response code.

Refused

The DNS server refused the query.

Malformed

The DNS response could not be parsed or had a mismatched query ID.

NetworkError

A network-level error occurred (socket bind, send, or receive failure).

InvalidInput

The domain name or token argument was empty or invalid.

Implementations

impl DnsError

pub fn code(&self) -> &'static str

Returns a stable, namespaced string code for this error.

Codes have the form "dns:<variant>", e.g. "dns:timeout".

Trait Implementations

impl Clone for DnsError

fn clone(&self) -> DnsError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DnsError

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

Formats the value using the given formatter.

impl Display for DnsError

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

Formats the value using the given formatter.

impl Error for DnsError

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 PartialEq for DnsError

fn eq(&self, other: &DnsError) -> 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 DnsError

impl Eq for DnsError

impl StructuralPartialEq for DnsError