Struct cjdns_hdr::DataHeader

pub struct DataHeader {
    pub version: u8,
    pub content_type: ContentType,
}

Deserialized data header struct.

Fields

version: u8

content_type: ContentType

Implementations

impl DataHeader

pub const SIZE: usize

Size of serialized DataHeader

pub const CURRENT_VERSION: u8

Current version of DataHeader which is automatically set, if version is not specified during serialization.

pub fn parse(data: &[u8]) -> Result<Self, ParseError>

Parses raw bytes into DataHeader struct.

Results in error if input bytes length isn't equal to 4, which is current size of serialized header.

DataHeader bytes have a following structure : one byte each for version and padding, two bytes for content number. Content number is a u16 number which is a numerical representation of ContentType. If content number is not defined in ContentType, default ContentType variant will be used. Note: default ContentType variant is a temporary solution.

pub fn serialize(&self) -> Result<Vec<u8>, SerializeError>

Serializes DataHeader instance.

DataHeader type can be instantiated directly, without using parse method. That's why serialization can result in errors. If header version is greater than 15, then serialization fails, because version is only a 4-bit field in DataHeader. Also serialization fails if no suitable 16-bit content type code was found.

If DataHeader was instantiated with 0 version, header will be parsed with version equal to current version.

Trait Implementations

impl Clone for DataHeader

fn clone(&self) -> DataHeader

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DataHeader

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

Formats the value using the given formatter.

impl Default for DataHeader

fn default() -> Self

Returns the "default value" for a type.

impl Eq for DataHeader

impl PartialEq<DataHeader> for DataHeader

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StructuralEq for DataHeader

impl StructuralPartialEq for DataHeader