Struct FieldSpecifier 

pub struct FieldSpecifier {
    pub information_element_identifier: u16,
    pub field_length: u16,
    pub enterprise_number: Option<u32>,
}

Field Specifier - RFC 7011 Section 3.2

0                   1                   2                   3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|E|  Information Element ident. |        Field Length           |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                      Enterprise Number                        |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

The Enterprise bit (E) is not stored separately: it is set if and only if enterprise_number is Some.

Fields

information_element_identifier: u16

Information Element identifier (15 bits, Enterprise bit removed)

field_length: u16

Length of the encoded Information Element, in octets. VARIABLE_LENGTH (65535) means variable-length.

enterprise_number: Option<u32>

IANA Private Enterprise Number, present if the Enterprise bit is set

Implementations

impl FieldSpecifier

pub const VARIABLE_LENGTH: u16 = 65535

Field Length value reserved for variable-length Information Elements (RFC 7011 Section 7)

pub fn is_variable_length(&self) -> bool

Whether the Information Element is variable-length

pub fn is_reverse(&self) -> bool

Whether the Field Specifier refers to a reverse Information Element (RFC 5103, Private Enterprise Number 29305)

pub fn information_element(&self) -> Option<&'static InformationElement>

The IANA Information Element this Field Specifier refers to.

For reverse Information Elements (RFC 5103), the forward Information Element is returned. RFC 5103 Section 6.1 lets a Collecting Process discard the reverse counterpart of a non-reversible element; this parser keeps and decodes it instead. Returns None for enterprise-specific or unknown Information Elements.

Trait Implementations

impl Clone for FieldSpecifier

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FieldSpecifier

impl Debug for FieldSpecifier

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

Formats the value using the given formatter.

impl Eq for FieldSpecifier

impl Hash for FieldSpecifier

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for FieldSpecifier

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FieldSpecifier