Struct IPv4Reader

pub struct IPv4Reader<'a> {
    pub bytes: &'a [u8],
}

Reads IPv4 header fields.

Fields

bytes: &'a [u8]

Implementations

impl<'a> IPv4Reader<'a>

pub fn new(bytes: &'a [u8]) -> Result<Self, &'static str>

Creates a new IPv4Reader from the given slice.

pub fn version(&self) -> u8

Returns the version field.

pub fn ihl(&self) -> u8

Returns the IHL field.

pub fn dscp(&self) -> u8

Returns the DSCP field.

pub fn ecn(&self) -> u8

Returns the ECN field.

pub fn total_length(&self) -> u16

Returns the total length field.

Includes the entire packet (header and payload).

pub fn id(&self) -> u16

Returns the identification field.

pub fn flags(&self) -> u8

Returns the flags field.

pub fn fragment_offset(&self) -> u16

Returns the fragment offset field.

pub fn ttl(&self) -> u8

Returns the TTL field.

pub fn protocol(&self) -> u8

Returns the protocol field.

pub fn src_ip(&self) -> &[u8]

Returns a reference to the source IP address field.

pub fn dest_ip(&self) -> &[u8]

Returns a reference to the destination IP address field.

pub fn checksum(&self) -> u16

Returns the checksum field.

pub fn header_len(&self) -> usize

Returns the indicated header length in bytes.

pub fn header(&self) -> Result<&'a [u8], &'static str>

Returns a reference to the header.

May fail if the indicated header length exceeds the allocated buffer.

pub fn payload(&self) -> Result<&'a [u8], &'static str>

Returns a reference to the payload.

May fail if the indicated header length exceeds the allocated buffer.

pub fn valid_checksum(&self) -> Result<bool, &'static str>

Verifies the checksum field.

Trait Implementations

impl Debug for IPv4Reader<'_>

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

Formats the value using the given formatter.

impl<'a> ParseReader<'a> for IPv4Reader<'a>

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

Parses an IPv4 packet from a byte slice.

Validates the IPv4 version, header length, total length, and checksum fields.

impl<'a> PartialEq for IPv4Reader<'a>

fn eq(&self, other: &IPv4Reader<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> VerifyReader<'a> for IPv4Reader<'a>

fn verify_checksum(&self) -> Result<(), &'static str>

Verifies the checksum of an encapsulated protocol in an IPv4 packet.

Computes the pseudo-header checksum and verifies it with the encapsulated payload.

impl<'a> StructuralPartialEq for IPv4Reader<'a>