Struct DhcpLayer 

pub struct DhcpLayer {
    pub index: LayerIndex,
}

DHCP layer — a zero-copy view into a parsed DHCP packet.

Fields

index: LayerIndex

Implementations

impl DhcpLayer

pub fn new(index: LayerIndex) -> Self

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

BOOTP op code: 1 = request, 2 = reply.

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

Hardware type (1 = Ethernet).

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

Hardware address length.

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

Hops.

pub fn xid(&self, buf: &[u8]) -> Result<u32, FieldError>

Transaction ID.

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

Seconds elapsed.

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

Flags.

pub fn ciaddr(&self, buf: &[u8]) -> Result<Ipv4Addr, FieldError>

Client IP address.

pub fn yiaddr(&self, buf: &[u8]) -> Result<Ipv4Addr, FieldError>

Your (client) IP address.

pub fn siaddr(&self, buf: &[u8]) -> Result<Ipv4Addr, FieldError>

Server IP address.

pub fn giaddr(&self, buf: &[u8]) -> Result<Ipv4Addr, FieldError>

Gateway IP address.

pub fn chaddr(&self, buf: &[u8]) -> Result<[u8; 6], FieldError>

Client hardware address (first 6 bytes for Ethernet).

pub fn options(&self, buf: &[u8]) -> Vec<DhcpOption>

Parse all DHCP options.

pub fn get_option(&self, buf: &[u8], opt_code: u8) -> Option<DhcpOption>

Get a specific option by code.

pub fn msg_type(&self, buf: &[u8]) -> Option<u8>

Get the DHCP message type.

pub fn server_id(&self, buf: &[u8]) -> Option<Ipv4Addr>

Get the server identifier.

pub fn requested_ip(&self, buf: &[u8]) -> Option<Ipv4Addr>

Get the requested IP address.

pub fn lease_time(&self, buf: &[u8]) -> Option<u32>

Get the lease time option value.

pub fn subnet_mask(&self, buf: &[u8]) -> Option<Ipv4Addr>

Get the subnet mask option.

pub fn router(&self, buf: &[u8]) -> Option<Ipv4Addr>

Get the router option.

pub fn dns(&self, buf: &[u8]) -> Vec<Ipv4Addr>

Get the DNS servers option.

pub fn is_request(&self, buf: &[u8]) -> bool

Check if this is a DHCP request (BOOTP op=1).

pub fn is_reply(&self, buf: &[u8]) -> bool

Check if this is a DHCP reply (BOOTP op=2).

pub fn set_op(&self, buf: &mut [u8], val: u8) -> Result<(), FieldError>

Set the op field.

pub fn set_xid(&self, buf: &mut [u8], val: u32) -> Result<(), FieldError>

Set the xid field.

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

Set the flags field.

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

Get field value by name.

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

Set field value by name.

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

Field names for this layer.

Trait Implementations

impl Clone for DhcpLayer

fn clone(&self) -> DhcpLayer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DhcpLayer

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

Formats the value using the given formatter.

impl From<DhcpLayer> for LayerEnum

fn from(v: DhcpLayer) -> LayerEnum

Converts to this type from the input type.

impl Layer for DhcpLayer

fn kind(&self) -> LayerKind

Get the kind of this layer

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

Get a human-readable summary of this layer

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

Get the header length for this layer

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

Get the list of field names 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.

impl LayerDispatch for DhcpLayer

fn dispatch_kind(&self) -> LayerKind

Get the kind of this layer.

fn dispatch_index(&self) -> &LayerIndex

Get the layer index (start/end offsets).

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

Get a human-readable summary.

fn dispatch_header_len(&self, buf: &[u8]) -> usize

Get the header length in bytes.

fn dispatch_hashret(&self, buf: &[u8]) -> Vec<u8>

Compute a hash for packet matching.

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

Get field names for this layer type.

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

Get a field value by name.

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

Set a field value by name.

fn dispatch_show_fields(&self, buf: &[u8]) -> Vec<(&'static str, String)>

Get show-fields output.

impl TryInto<DhcpLayer> for LayerEnum

type Error = &'static str

The type returned in the event of a conversion error.

fn try_into(self) -> Result<DhcpLayer, <Self as TryInto<DhcpLayer>>::Error>

Performs the conversion.