Struct Ipv4Header 

#[repr(C, packed(1))]
pub struct Ipv4Header {
    pub version_ihl: u8,
    pub tos: u8,
    pub total_length: u16,
    pub identification: u16,
    pub flags_fragment: u16,
    pub ttl: u8,
    pub protocol: u8,
    pub checksum: u16,
    pub source_ip: [u8; 4],
    pub dest_ip: [u8; 4],
}

IPv4 header (minimum 20 bytes)

Fields

version_ihl: u8

Version (4 bits) + IHL (4 bits)

tos: u8

Type of Service

total_length: u16

Total Length (16 bits)

identification: u16

Identification (16 bits)

flags_fragment: u16

Flags (3 bits) + Fragment Offset (13 bits)

ttl: u8

Time to Live

protocol: u8

Protocol (8 bits)

checksum: u16

Header Checksum (16 bits)

source_ip: [u8; 4]

Source IP (32 bits)

dest_ip: [u8; 4]

Destination IP (32 bits)

Implementations

impl Ipv4Header

pub fn new() -> Self

Create a new IPv4 header

pub fn version(&self) -> u8

Get IP version (always 4)

pub fn ihl(&self) -> u8

Get IHL (Internet Header Length) in 32-bit words

pub fn header_length(&self) -> usize

Get header length in bytes

pub fn calculate_checksum(&self) -> u16

Calculate checksum

pub fn to_bytes(&self) -> Vec<u8>

Serialize header to bytes

pub fn from_bytes(bytes: &[u8]) -> Option<Self>

Parse header from bytes

Trait Implementations

impl Clone for Ipv4Header

fn clone(&self) -> Ipv4Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Ipv4Header

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

Formats the value using the given formatter.

impl Copy for Ipv4Header