Enum Error 

#[non_exhaustive]
pub enum Error {
    NotStun,
    Truncated,
    UnsupportedMethod(u16),
    MalformedAttribute(u16),
    ReservedAttribute(u16),
    Fingerprint,
    TooLong,
}

What a datagram that was not a STUN message this profile understands turned out to be.

Every variant is a dropped datagram. None of them is a panic, and none of them moves any state: an off-path attacker who can reach the media port can produce all of them at will.

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.

NotStun

Not STUN at all — the first two bits or the magic cookie say so (RFC 5389 §7.3).

Truncated

The message ends inside its own header, an attribute, or the length it claims.

UnsupportedMethod(u16)

A method other than Binding. ICE uses no others (RFC 8445 §7).

MalformedAttribute(u16)

A known attribute whose value is the wrong length, not UTF-8, or out of range.

ReservedAttribute(u16)

An Attribute::Unknown naming a type this module computes for itself.

Encoding only, and only from a caller that assembled the message by hand: the two integrity values must be the last two attributes and must be derived from everything before them, so a hand-supplied copy of either is refused rather than emitted.

Fingerprint

FINGERPRINT is present and does not match the message (RFC 5389 §15.5).

TooLong

More bytes than the 16-bit length field can describe. Unreachable from any credential Credentials admits; it exists so that no encoding path has to panic or truncate.

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, __formatter: &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 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