Struct UdpLayer 

pub struct UdpLayer {
    pub index: LayerIndex,
}

UDP layer representation.

UDP is a simple, connectionless transport protocol defined in RFC 768. The header is 8 bytes:

 0                   1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|          Source Port          |       Destination Port        |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|            Length             |           Checksum            |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                             Data                              |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Fields

index: LayerIndex

Implementations

impl UdpLayer

pub fn new(index: LayerIndex) -> Self

Create a new UDP layer from a layer index.

pub fn src_port(&self, buf: &[u8]) -> Result<u16, FieldError>

Get the source port.

pub fn dst_port(&self, buf: &[u8]) -> Result<u16, FieldError>

Get the destination port.

pub fn length(&self, buf: &[u8]) -> Result<u16, FieldError>

Get the length field (header + data length in bytes).

pub fn checksum(&self, buf: &[u8]) -> Result<u16, FieldError>

Get the checksum.

pub fn set_src_port(&self, buf: &mut [u8], value: u16) -> Result<(), FieldError>

Set the source port.

pub fn set_dst_port(&self, buf: &mut [u8], value: u16) -> Result<(), FieldError>

Set the destination port.

pub fn set_length(&self, buf: &mut [u8], value: u16) -> Result<(), FieldError>

Set the length field.

pub fn set_checksum(&self, buf: &mut [u8], value: u16) -> Result<(), FieldError>

Set the checksum.

pub fn summary(&self, buf: &[u8]) -> String

Generate a summary string for display.

pub fn header_len(&self, _buf: &[u8]) -> usize

Get the UDP header length (always 8 bytes).

pub fn field_names(&self) -> &'static [&'static str]

Get field names for this layer.

pub fn get_field( &self, buf: &[u8], name: &str, ) -> Option<Result<FieldValue, FieldError>>

Get a field value by name.

pub fn set_field( &self, buf: &mut [u8], name: &str, value: FieldValue, ) -> Option<Result<(), FieldError>>

Set a field value by name.

Trait Implementations

impl Clone for UdpLayer

fn clone(&self) -> UdpLayer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UdpLayer

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

Formats the value using the given formatter.

impl Layer for UdpLayer

fn kind(&self) -> LayerKind

Get the kind of this layer

fn summary(&self, data: &[u8]) -> String

Get a human-readable summary of this layer

fn header_len(&self, data: &[u8]) -> usize

Get the header length for this layer

fn hashret(&self, _data: &[u8]) -> Vec<u8>

Compute a hash for packet matching.

fn answers(&self, data: &[u8], other: &Self, other_data: &[u8]) -> bool

Check if this packet answers another packet.

fn extract_padding<'a>(&self, data: &'a [u8]) -> (&'a [u8], &'a [u8])

Extract padding from the packet.

fn field_names(&self) -> &'static [&'static str]

Get the list of field names for this layer