Struct etherparse::Ipv4Header

pub struct Ipv4Header {
    pub header_length: u8,
    pub differentiated_services_code_point: u8,
    pub explicit_congestion_notification: u8,
    pub total_length: u16,
    pub identification: u16,
    pub dont_fragment: bool,
    pub more_fragments: bool,
    pub fragments_offset: u16,
    pub time_to_live: u8,
    pub protocol: u8,
    pub header_checksum: u16,
    pub source: [u8; 4],
    pub destination: [u8; 4],
}

IPv4 header without options.

Fields

header_length: u8

differentiated_services_code_point: u8

explicit_congestion_notification: u8

total_length: u16

identification: u16

dont_fragment: bool

more_fragments: bool

fragments_offset: u16

time_to_live: u8

protocol: u8

header_checksum: u16

source: [u8; 4]

destination: [u8; 4]

Methods

impl Ipv4Header

pub fn new(
    payload_and_options_length: usize,
    time_to_live: u8,
    protocol: IpTrafficClass,
    source: [u8; 4],
    destination: [u8; 4]
) -> Result<Ipv4Header, ValueError>

Constructs an Ipv4Header with standard values for non specified values. Note: This header calculates the checksum assuming that there are no ipv4 options. In case there are calculate the checksum using the "calc_header_checksum" method.

pub fn read<T: Read + Seek + Sized>(
    reader: &mut T
) -> Result<Ipv4Header, ReadError>

Reads an IPv4 header from the current position.

pub fn read_without_version<T: Read + Seek + Sized>(
    reader: &mut T,
    version_rest: u8
) -> Result<Ipv4Header, Error>

Reads an IPv4 header assuming the version & ihl field have already been read.

pub fn write<T: Write + Sized>(
    &self,
    writer: &mut T,
    options: &[u8]
) -> Result<(), WriteError>

Writes a given IPv4 header to the current position (this method automatically calculates the header length and checksum).

pub fn write_raw<T: Write + Sized>(
    &self,
    writer: &mut T,
    options: &[u8]
) -> Result<(), WriteError>

Writes a given IPv4 header to the current position (this method just writes the specified checksum and header_length and does note compute it).

pub fn calc_header_checksum(&self, options: &[u8]) -> Result<u16, ValueError>

Calculate header checksum of the current ipv4 header.

pub fn set_payload_and_options_length(
    &mut self,
    size: usize
) -> Result<(), ValueError>

Sets the field total_length based on the size of the payload and the options. Returns an error if the payload is too big to fit.

Trait Implementations

impl Clone for Ipv4Header

fn clone(&self) -> Ipv4Header

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Ipv4Header

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for Ipv4Header

impl PartialEq for Ipv4Header

fn eq(&self, __arg_0: &Ipv4Header) -> bool

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

fn ne(&self, __arg_0: &Ipv4Header) -> bool

This method tests for !=.

impl SerializedSize for Ipv4Header

const SERIALIZED_SIZE: usize

SERIALIZED_SIZE: usize = 20

Size of the header itself (without options) in bytes.