Enum SixlowpanFragRepr 

pub enum SixlowpanFragRepr {
    FirstFragment {
        size: u16,
        tag: u16,
    },
    Fragment {
        size: u16,
        tag: u16,
        offset: u8,
    },
}

The fields of a 6LoWPAN fragment header.

A first fragment header has the following format (RFC 4944 § 5.3):

                     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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1 1 0 0 0|    datagram_size    |         datagram_tag          |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Subsequent fragment headers have the following format:

                     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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1 1 1 0 0|    datagram_size    |         datagram_tag          |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|datagram_offset|
+-+-+-+-+-+-+-+-+

Variants

FirstFragment

The first fragment of a datagram.

Fields

size: u16

The size of the whole IPv6 datagram.

tag: u16

The tag shared by every fragment of the datagram.

Fragment

Any fragment but the first.

Fields

size: u16

The size of the whole IPv6 datagram.

tag: u16

The tag shared by every fragment of the datagram.

offset: u8

The offset of this fragment, in units of 8 octets.

Implementations

impl Repr

pub fn parse(buf: &[u8]) -> Result<Self>

Parse a fragment header from the front of buf.

Errors:

• Error if the buffer is shorter than the header, or does not start with a fragment header dispatch.

pub const fn size(&self) -> u16

The size of the whole IPv6 datagram.

pub const fn tag(&self) -> u16

The tag shared by every fragment of the datagram.

pub const fn offset(&self) -> u8

The offset of this fragment, in units of 8 octets. Zero for the first.

pub const fn is_first_fragment(&self) -> bool

Whether this is the header of a first fragment.

pub const fn buffer_len(&self) -> usize

Return the length of the header.

pub fn key(&self, ieee802154_repr: &Ieee802154Repr) -> Key

The key identifying the datagram this fragment belongs to.

Panics

Panics if the MAC header has no source or destination address.

pub fn emit(&self, buf: &mut [u8])

Write the header into the front of buf.

Writes exactly buffer_len bytes.

Panics

Panics if buf is shorter than buffer_len.

Trait Implementations

impl Clone for Repr

fn clone(&self) -> Repr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Repr

impl Debug for Repr

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

Formats the value using the given formatter.

impl Display for Repr

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

Formats the value using the given formatter.

impl Eq for Repr

impl PartialEq for Repr

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Repr