Enum H2ErrorCode 

#[non_exhaustive]
pub enum H2ErrorCode {
    NoError = 0,
    ProtocolError = 1,
    InternalError = 2,
    FlowControlError = 3,
    SettingsTimeout = 4,
    StreamClosed = 5,
    FrameSizeError = 6,
    RefusedStream = 7,
    Cancel = 8,
    CompressionError = 9,
    ConnectError = 10,
    EnhanceYourCalm = 11,
    InadequateSecurity = 12,
    Http1_1Required = 13,
}

H2 error codes per RFC 9113 §7.

The same codes appear in both GOAWAY (connection errors) and RST_STREAM (stream errors); whether a given use is connection- or stream-level is determined by context, not by the code itself. Unknown wire values decode to Self::NoError per §5.4.4 / §5.4.5.

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.

NoError = 0

Graceful shutdown or no error to signal.

ProtocolError = 1

Peer violated protocol requirements.

InternalError = 2

An internal error in the HTTP stack.

FlowControlError = 3

Peer violated flow-control limits.

SettingsTimeout = 4

Settings frame was not acknowledged in a timely manner.

StreamClosed = 5

A frame was received on a closed stream.

FrameSizeError = 6

A frame of an incorrect size was received.

RefusedStream = 7

The stream was refused before any application processing.

Cancel = 8

The stream was cancelled.

CompressionError = 9

HPACK compression state could not be maintained.

ConnectError = 10

TCP connection for a CONNECT request was reset or abnormally closed.

EnhanceYourCalm = 11

Peer is generating excessive load.

InadequateSecurity = 12

Negotiated TLS parameters are unacceptable.

Http1_1Required = 13

Request must be retried over HTTP/1.1.

Trait Implementations

impl Clone for H2ErrorCode

fn clone(&self) -> H2ErrorCode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for H2ErrorCode

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

Formats the value using the given formatter.

impl Display for H2ErrorCode

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

Formats the value using the given formatter.

impl Error for H2ErrorCode

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<H2ErrorCode> for H2Error

fn from(source: H2ErrorCode) -> Self

Converts to this type from the input type.

impl From<H2ErrorCode> for u32

fn from(code: H2ErrorCode) -> u32

Converts to this type from the input type.

impl From<u32> for H2ErrorCode

fn from(value: u32) -> Self

Unknown error codes decode to Self::NoError per RFC 9113 §5.4.4 / §5.4.5.

impl PartialEq for H2ErrorCode

fn eq(&self, other: &H2ErrorCode) -> 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 H2ErrorCode

impl Eq for H2ErrorCode

impl StructuralPartialEq for H2ErrorCode