Enum NpduDecodeError 

pub enum NpduDecodeError {
    AddressTooLong {
        field: AddressField,
        length: u8,
        dnet: Option<u16>,
        source: Option<NpduAddress>,
    },
    Malformed(Malformed),
}

Why decode_npdu refused an NPDU: bacnet-npdu’s DecodeError, with the source behind an over-long DADR owned.

Variants

AddressTooLong

The DLEN or SLEN octet is larger than MAX_MAC_LEN (#1141), so the address names no node on a standard data link or on one this stack serves.

Clause 6.4.4 gives routers Reject-Message-To-Network reason 6 (ADDRESSING_ERROR) for an NPDU whose DADR or SADR length is invalid. dnet is the network the reject names, and source is where it goes when a router relayed the refused NPDU (#1158).

Fields

field: AddressField

Which address the length octet introduces.

length: u8

The DLEN or SLEN octet as received.

dnet: Option<u16>

The NPDU’s DNET, when its control octet announces one. It precedes both length octets on the wire, so it is always known here.

source: Option<NpduAddress>

The NPDU’s SNET/SADR, when the over-long field is the DADR and a complete, valid source follows the DLEN octets the frame announces. It is None when the SADR itself is the over-long field, since that source names no node.

Malformed(Malformed)

Any other malformation: a short buffer, an unknown protocol version, a reserved network number, SLEN 0, or a truncated address or field.

Trait Implementations

impl Clone for NpduDecodeError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NpduDecodeError

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

Formats the value using the given formatter.

impl Display for NpduDecodeError

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

Formats the value using the given formatter.

impl Eq for NpduDecodeError

impl Error for NpduDecodeError

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<NpduDecodeError> for Error

fn from(error: NpduDecodeError) -> Self

An over-long address becomes Error::Range: the length octet is well formed, but its value is past the limit. Its text is the refusal’s own. Any other fault becomes Error::Decoding, with the fault’s text: DecodingKind::Missing for a frame that ends inside a field, DecodingKind::InvalidEncoding for the rest. Neither knows the offset, so it reads 0.

impl PartialEq for NpduDecodeError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for NpduDecodeError