Struct Sum16BitWords 

pub struct Sum16BitWords { /* private fields */ }

Helper for calculating the sum of all 16 bit words checksums used in in checksum fields in TCP and UDP headers.

Implementations

impl Sum16BitWords

pub fn new() -> Sum16BitWords

pub fn add_slice(self, slice: &[u8]) -> Sum16BitWords

Available on 64-bit only.

Add the given slice to the checksum. In case the slice has a length that is not multiple of 2 the last byte will be padded with 0.

pub fn add_2bytes(self, value: [u8; 2]) -> Sum16BitWords

Available on 64-bit only.

Add a 2 byte word.

pub fn add_4bytes(&mut self, value: [u8; 4]) -> Sum16BitWords

Available on 64-bit only.

Add a 4 byte word.

pub fn add_8bytes(&mut self, value: [u8; 8]) -> Sum16BitWords

Available on 64-bit only.

Add a 8 byte word.

pub fn add_16bytes(&mut self, value: [u8; 16]) -> Sum16BitWords

Add a 16 bytes.

pub fn ones_complement(&self) -> u16

Available on 64-bit only.

Converts summed up words from an u32 to an u16 ones complement which can be used in a ipv4 checksum.

pub fn to_ones_complement_with_no_zero(&self) -> u16

Available on 64-bit only.

Converts summed up words from an u32 to an u16 ones complement with 0 being replaced by 0xffff (useful for TCP and UDP).

This kind of checksum is used in TCP and UDP headers.

Trait Implementations

impl Clone for Sum16BitWords

fn clone(&self) -> Sum16BitWords

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Sum16BitWords

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

Formats the value using the given formatter.

impl Default for Sum16BitWords

fn default() -> Sum16BitWords

Returns the “default value” for a type.

impl PartialEq for Sum16BitWords

fn eq(&self, other: &Sum16BitWords) -> 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 Eq for Sum16BitWords

impl StructuralPartialEq for Sum16BitWords