Struct sv::messages::MessageHeader

pub struct MessageHeader {
    pub magic: [u8; 4],
    pub command: [u8; 12],
    pub payload_size: u32,
    pub checksum: [u8; 4],
}

Header that begins all messages

Fields

magic: [u8; 4]

Magic bytes indicating the network type

command: [u8; 12]

Command name

payload_size: u32

Payload size

checksum: [u8; 4]

First 4 bytes of SHA256(SHA256(payload))

Methods

impl MessageHeader

pub const SIZE: usize

Size of the message header in bytes

pub fn size(&self) -> usize

Returns the size of the header in bytes

pub fn validate(&self, magic: [u8; 4], max_size: u32) -> Result<()>

Checks if the header is valid

magic - Expected magic bytes for the network max_size - Max size in bytes for the payload

pub fn payload(&self, reader: &mut dyn Read) -> Result<Vec<u8>>

Reads the payload and verifies its checksum

Trait Implementations

impl Serializable<MessageHeader> for MessageHeader

fn read(reader: &mut dyn Read) -> Result<MessageHeader>

Reads the object from serialized form

fn write(&self, writer: &mut dyn Write) -> Result<()>

Writes the object to serialized form

impl Clone for MessageHeader

fn clone(&self) -> MessageHeader

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Eq for MessageHeader

impl Default for MessageHeader

fn default() -> MessageHeader

Returns the "default value" for a type.

impl PartialEq<MessageHeader> for MessageHeader

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

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

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

This method tests for !=.

impl Debug for MessageHeader

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

Formats the value using the given formatter.

impl Hash for MessageHeader

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,

Feeds a slice of this type into the given [Hasher].