Struct Ipv4Hdr 

#[repr(C)]
pub struct Ipv4Hdr {
    pub vihl: u8,
    pub tos: u8,
    pub tot_len: [u8; 2],
    pub id: [u8; 2],
    pub frags: [u8; 2],
    pub ttl: u8,
    pub proto: IpProto,
    pub check: [u8; 2],
    pub src_addr: [u8; 4],
    pub dst_addr: [u8; 4],
}

IPv4 header, which is present after the Ethernet header.

Fields

vihl: u8

tos: u8

tot_len: [u8; 2]

id: [u8; 2]

frags: [u8; 2]

ttl: u8

proto: IpProto

check: [u8; 2]

src_addr: [u8; 4]

dst_addr: [u8; 4]

Implementations

impl Ipv4Hdr

pub const LEN: usize = 20usize

pub fn version(&self) -> u8

Returns the IP version field (should be 4).

pub fn ihl(&self) -> u8

Returns the IP header length in bytes.

pub fn set_vihl(&mut self, version: u8, ihl_in_bytes: u8)

Sets both the version and IHL fields.

pub fn dscp(&self) -> u8

Returns the DSCP (Differentiated Services Code Point) field.

pub fn ecn(&self) -> u8

Returns the ECN (Explicit Congestion Notification) field.

pub fn set_tos(&mut self, dscp: u8, ecn: u8)

Sets the TOS field with separate DSCP and ECN values.

pub fn tot_len(&self) -> u16

Returns the total length of the IP packet.

pub fn set_tot_len(&mut self, len: u16)

Sets the total length of the IP packet.

pub fn id(&self) -> u16

Returns the identification field.

pub fn set_id(&mut self, id: u16)

Sets the identification field.

pub fn frag_flags(&self) -> u8

Returns the fragmentation flags (3 bits).

pub fn frag_offset(&self) -> u16

Returns the fragmentation offset (13 bits).

pub fn set_frags(&mut self, flags: u8, offset: u16)

Sets both the fragmentation flags and offset.

pub fn checksum(&self) -> u16

Returns the checksum field.

pub fn set_checksum(&mut self, checksum: u16)

Sets the checksum field.

pub fn src_addr(&self) -> Ipv4Addr

Returns the source address field.

pub fn dst_addr(&self) -> Ipv4Addr

Returns the destination address field.

pub fn set_src_addr(&mut self, src: Ipv4Addr)

Sets the source address field.

pub fn set_dst_addr(&mut self, dst: Ipv4Addr)

Sets the destination address field.

Trait Implementations

impl Clone for Ipv4Hdr

fn clone(&self) -> Ipv4Hdr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Ipv4Hdr

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

Formats the value using the given formatter.

impl Copy for Ipv4Hdr