Struct MpeDatagramSection 

pub struct MpeDatagramSection<'a> {
    pub section_syntax_indicator: bool,
    pub private_indicator: bool,
    pub mac_address: [u8; 6],
    pub payload_scrambling_control: u8,
    pub address_scrambling_control: u8,
    pub llc_snap_flag: bool,
    pub current_next_indicator: bool,
    pub section_number: u8,
    pub last_section_number: u8,
    pub payload: &'a [u8],
    pub checksum: [u8; 4],
}

MPE datagram_section (ETSI EN 301 192 §7.1).

The 48-bit destination MAC is scattered across the section by the wire format (Figure 1, PDF p. 18): MAC_address_1 (the most-significant byte) lands last, MAC_address_6 (the least-significant byte) lands first:

section byte:   3        4        8        9        10       11
MAC field:      MAC_6    MAC_5    MAC_4    MAC_3    MAC_2    MAC_1
MAC byte:       LSB ...                                 ... MSB

We reassemble it into MpeDatagramSection::mac_address in network order (MAC_1..MAC_6, most-significant first), so mac_address[0] is MAC_1 and mac_address[5] is MAC_6.

Fields

section_syntax_indicator: bool

section_syntax_indicator bit. When true the trailer is a computed CRC_32; when false it is an ISO/IEC 13818-6 checksum preserved verbatim in Self::checksum.

private_indicator: bool

private_indicator bit (byte 1, bit 6).

mac_address: [u8; 6]

Destination MAC address in network order, MAC_1 (MSB) first through MAC_6 (LSB) last. See the struct docs for the wire scatter.

payload_scrambling_control: u8

2-bit payload_scrambling_control (EN 301 192 Table 4). 0 = unscrambled; 1/2/3 = service-defined.

address_scrambling_control: u8

2-bit address_scrambling_control (EN 301 192 Table 5). 0 = unscrambled; 1/2/3 = service-defined.

llc_snap_flag: bool

LLC_SNAP_flag. When true, Self::payload is an LLC/SNAP- encapsulated datagram; when false, a bare IP datagram. We keep the payload raw either way (LLC/SNAP and IP framing are out of scope).

current_next_indicator: bool

current_next_indicator bit (the spec mandates 1).

section_number: u8

Section index within the fragmented datagram.

last_section_number: u8

Final section index of the fragmented datagram.

payload: &'a [u8]

Raw payload: LLC/SNAP bytes when Self::llc_snap_flag is set, else IP datagram bytes — plus any trailing stuffing_bytes — kept as one borrowed slice running from byte 12 to the 4-byte trailer. We do not parse LLC/SNAP or IP, nor split out stuffing (EN 301 192 §7.1).

checksum: [u8; 4]

Verbatim trailer bytes when section_syntax_indicator == false (an ISO/IEC 13818-6 checksum we cannot recompute). Ignored when SSI is true, where the trailer is a computed CRC_32.

Trait Implementations

impl<'a> Clone for MpeDatagramSection<'a>

fn clone(&self) -> MpeDatagramSection<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for MpeDatagramSection<'a>

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

Formats the value using the given formatter.

impl<'a> Eq for MpeDatagramSection<'a>

impl<'a> From<MpeDatagramSection<'a>> for AnyTable<'a>

fn from(t: MpeDatagramSection<'a>) -> Self

Converts to this type from the input type.

impl<'a> Parse<'a> for MpeDatagramSection<'a>

type Error = Error

The error type this implementer returns. Typically the enclosing crate’s Error enum.

fn parse(bytes: &'a [u8]) -> Result<Self>

Parse bytes as Self. Returns Err(Self::Error) on any protocol violation or buffer underrun.

impl<'a> PartialEq for MpeDatagramSection<'a>

fn eq(&self, other: &MpeDatagramSection<'a>) -> 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 Serialize for MpeDatagramSection<'_>

type Error = Error

The error type this implementer returns (usually the same as the corresponding Parse impl, but need not be).

fn serialized_len(&self) -> usize

Number of bytes serialize_into will write.

fn serialize_into(&self, buf: &mut [u8]) -> Result<usize>

Write the serialised form into buf. Returns the number of bytes written (always equal to serialized_len()).

fn to_bytes(&self) -> Vec<u8>

where Self::Error: Debug,

Convenience: allocate a Vec and serialise into it. Panics only if serialize_into misreports serialized_len() — a contract every implementer is responsible for upholding.

impl<'a> Serialize for MpeDatagramSection<'a>

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'a> StructuralPartialEq for MpeDatagramSection<'a>

impl<'a> Table<'a> for MpeDatagramSection<'a>

const TABLE_ID: u8 = TABLE_ID

Expected table_id for this table.

const PID: u16 = PID

PID on which this table is typically carried.

impl<'a> TableDef<'a> for MpeDatagramSection<'a>

const TABLE_ID_RANGES: &'static [(u8, u8)]

0x3E is included in DsmccSection’s range [(0x3A, 0x3F)] and is NOT auto-dispatched to this type by the default dispatcher. Use AnyTable::parse_as::<MpeDatagramSection> or MpeDatagramSection::parse to obtain the typed MPE view.

const NAME: &'static str = "MPE_DATAGRAM_SECTION"

Spec name for diagnostics. SCREAMING_SNAKE, suffix-free: PROGRAM_ASSOCIATION, EVENT_INFORMATION, SERVICE_DESCRIPTION.

impl<'a> Yokeable<'a> for MpeDatagramSection<'static>

type Output = MpeDatagramSection<'a>

This type MUST be Self with the 'static replaced with 'a, i.e. Self<'a>

fn transform(&'a self) -> &'a Self::Output

This method must cast self between &'a Self<'static> and &'a Self<'a>.

fn transform_owned(self) -> Self::Output

This method must cast self between Self<'static> and Self<'a>.

unsafe fn make(this: Self::Output) -> Self

This method can be used to cast away Self<'a>’s lifetime.

fn transform_mut<F>(&'a mut self, f: F)

where F: 'static + for<'b> FnOnce(&'b mut Self::Output),

This method must cast self between &'a mut Self<'static> and &'a mut Self<'a>, and pass it to f.