Enum TraceContextError 

#[non_exhaustive]
pub enum TraceContextError {
    Length(usize),
    UnsupportedVersion,
    Malformed,
    ZeroTraceId,
    ZeroSpanId,
}

Why Krabka rejected a client-supplied W3C trace context.

No variant holds the input that failed. An attacker controls a rejected traceparent, and a message that keeps it verbatim would put that string into the log field that shows the error.

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.

Length(usize)

The traceparent is not exactly 55 bytes long.

UnsupportedVersion

Krabka reads only version 00 of the W3C traceparent format.

Malformed

A separator was missing or a field held a non-lower-hex byte.

ZeroTraceId

The W3C specification defines an all-zero trace-id as invalid.

ZeroSpanId

The W3C specification defines an all-zero parent span-id as invalid.

Trait Implementations

impl Clone for TraceContextError

fn clone(&self) -> TraceContextError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TraceContextError

impl Debug for TraceContextError

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

Formats the value using the given formatter.

impl Display for TraceContextError

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

Formats the value using the given formatter.

impl Eq for TraceContextError

impl Error for TraceContextError

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 TraceContextError

fn eq(&self, other: &TraceContextError) -> 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 StructuralPartialEq for TraceContextError