Struct etherparse::Ipv4Extensions

pub struct Ipv4Extensions {
    pub auth: Option<IpAuthenticationHeader>,
}

IPv4 extension headers present after the ip header.

Currently supported:

• Authentication Header

Currently not supported:

• Encapsulating Security Payload Header (ESP)

Fields

auth: Option<IpAuthenticationHeader>

Implementations

impl Ipv4Extensions

pub fn from_slice(
    start_protocol: u8,
    slice: &[u8]
) -> Result<(Ipv4Extensions, u8, &[u8]), ReadError>

Read all known ipv4 extensions and return an Ipv4ExtensionSlices with the identified slices, the final ip number and a slice pointing to the non parsed data.

pub fn read<T: Read + Seek + Sized>(
    reader: &mut T,
    start_ip_number: u8
) -> Result<(Ipv4Extensions, u8), ReadError>

Reads the known ipv4 extension headers from the reader and returns the headers together with the internet protocol number identifying the protocol that will be next.

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

Write the extensions to the writer.

pub fn header_len(&self) -> usize

Length of the all present headers in bytes.

pub fn set_next_headers(&mut self, last_protocol_number: u8) -> u8

Sets all the next_header fields of the headers based on the adviced default order with the given protocol number as last “next header” value. The return value is the protocol number of the first existing extension header that should be entered in the ipv4 header as protocol_number.

If no extension headers are present the value of the argument is returned.

pub fn next_header(&self, first_next_header: u8) -> Result<u8, ValueError>

Return next header based on the extension headers and the first ip protocol number.

In case a header is never referenced a ValueError::Ipv4ExtensionNotReferenced is returned.

pub fn is_empty(&self) -> bool

Returns true if no IPv4 extension header is present (all fields None).

Trait Implementations

impl Clone for Ipv4Extensions

fn clone(&self) -> Ipv4Extensions

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Ipv4Extensions

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

Formats the value using the given formatter.

impl Default for Ipv4Extensions

fn default() -> Ipv4Extensions

Returns the “default value” for a type.

impl PartialEq<Ipv4Extensions> for Ipv4Extensions

fn eq(&self, other: &Ipv4Extensions) -> bool

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

fn ne(&self, other: &Ipv4Extensions) -> bool

This method tests for !=.

impl Eq for Ipv4Extensions

impl StructuralEq for Ipv4Extensions

impl StructuralPartialEq for Ipv4Extensions