Struct Ipv4Header 

pub struct Ipv4Header {
    pub source: Ipv4Addr,
    pub destination: Ipv4Addr,
    pub protocol: IpProtocol,
    pub hop_limit: u8,
    pub traffic_class: u8,
    pub fragment: IpFragment,
    pub dont_fragment: bool,
}

Available on crate feature net only.

IPv4 header fields for packet construction. Options are supplied to Self::encode.

Fields

source: Ipv4Addr

Source address.

destination: Ipv4Addr

Destination address.

protocol: IpProtocol

Payload protocol.

hop_limit: u8

Time to live.

traffic_class: u8

DSCP and ECN.

fragment: IpFragment

Packet identification and fragmentation metadata. Encoding requires a sixteen-bit identification and an eight-byte-aligned offset.

dont_fragment: bool

Don’t Fragment flag.

Implementations

impl Ipv4Header

pub const fn new( source: Ipv4Addr, destination: Ipv4Addr, protocol: IpProtocol, ) -> Ipv4Header

An unfragmented header with hop limit 64, no ECN/DSCP and identification zero.

pub const fn with_identification(self, identification: u16) -> Ipv4Header

Set the IPv4 identification, whose wire width is sixteen bits.

pub const fn try_with_fragment( self, offset: u16, more: bool, ) -> Result<Ipv4Header, IpPacketError>

Set a fragment’s byte offset and More Fragments flag. Offsets must be aligned to eight bytes; payload-dependent checks occur on encoding.

pub const fn fragment(&self) -> IpFragment

Identification and fragment metadata.

pub fn encode( &self, options: &[u8], payload: &[u8], output: &mut [u8], ) -> Result<usize, IpPacketError>

Serialize a complete packet. Options must include zero padding to a four-byte boundary. The output is untouched when any input is invalid.

pub fn encode_header<'b>( &self, options: &[u8], payload_len: usize, output: &'b mut [u8], ) -> Result<&'b mut [u8], IpPacketError>

Write the header and return the caller-owned payload region to fill. Lengths and options are checked before touching the output.

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 Copy for Ipv4Header

impl Debug for Ipv4Header

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

Formats the value using the given formatter.