Struct Ipv4Packet 

pub struct Ipv4Packet<'a> { /* private fields */ }

A structurally validated immutable RFC 791 packet view.

Parsing validates version, IHL, and declared total length, then excludes trailing capture bytes. It deliberately accepts bad checksums and reserved flags for capture/offload and malformed-packet inspection.

Implementations

impl<'a> Ipv4Packet<'a>

pub fn icmpv4(&self) -> Result<Option<Icmpv4Message<'a>>, ParseError>

Parses ICMPv4 only when this is an unfragmented ICMP packet.

pub fn udp(&self) -> Result<Option<UdpDatagram<'a>>, ParseError>

Parses UDP only when this is an unfragmented UDP packet.

pub fn tcp(&self) -> Result<Option<TcpSegment<'a>>, ParseError>

Parses TCP only when this is an unfragmented TCP packet.

impl<'a> Ipv4Packet<'a>

pub fn parse(bytes: &'a [u8]) -> Result<Self, ParseError>

Validates RFC 791 structural bounds; use checksum_is_valid for checksum acceptance.

pub fn dscp_ecn(&self) -> u8

Returns the combined DSCP/ECN octet.

pub fn total_length(&self) -> u16

Returns the RFC 791 total-length field.

pub fn identification(&self) -> u16

Returns the identification field.

pub fn flags_fragment_offset(&self) -> u16

Returns the raw flags and fragment-offset field, including the reserved flag.

pub fn ttl(&self) -> u8

Returns the time-to-live field.

pub fn protocol(&self) -> Ipv4Protocol

Returns the protocol field while preserving unknown values.

pub fn header_checksum(&self) -> u16

Returns the encoded RFC 791 header checksum.

pub fn source(&self) -> Ipv4Address

Returns the source address.

pub fn destination(&self) -> Ipv4Address

Returns the destination address.

pub fn options(&self) -> &'a [u8]

Returns RFC 791 option bytes included by IHL.

pub fn payload(&self) -> &'a [u8]

Returns declared payload bytes; they are not header-checksum covered.

pub fn as_bytes(&self) -> &'a [u8]

Returns exactly the declared IPv4 packet bytes.

pub fn checksum_is_valid(&self) -> bool

Checks the one’s-complement checksum across the complete IHL, including options.

Trait Implementations

impl<'a> Clone for Ipv4Packet<'a>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for Ipv4Packet<'a>

impl<'a> Debug for Ipv4Packet<'a>

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

Formats the value using the given formatter.

impl<'a> Eq for Ipv4Packet<'a>

impl<'a> PartialEq for Ipv4Packet<'a>

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

Equality operator ==.

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

Inequality operator !=.

impl<'a> StructuralPartialEq for Ipv4Packet<'a>