Struct IcmpTimestampMsgPart 

#[repr(C)]
pub struct IcmpTimestampMsgPart {
    pub originate_timestamp: [u8; 4],
    pub receive_timestamp: [u8; 4],
    pub transmit_timestamp: [u8; 4],
}

Represents the variable length portion of a Timestamp Request/Reply message (RFC 792) that follows the ICMP header.

Timestamps are milliseconds since midnight UT and are stored in network byte order.

Example

use aya_ebpf::programs::TcContext;
use network_types::eth::EthHdr;
use network_types::icmp::{Icmpv4Hdr, IcmpError, Icmpv4HdrData, IcmpTimestampMsgPart};
use network_types::ip::Ipv4Hdr;

fn handle_icmp_timestamp(ctx: &TcContext) -> Result<u32, IcmpError> {
    // Parse the ICMP header from start of payload
    let icmp_start = ctx.data() + EthHdr::LEN + Ipv4Hdr::LEN;
    let icmp_hdr: *mut Icmpv4Hdr = icmp_start as *mut Icmpv4Hdr;

    // Timestamp request/reply share the same echo layout; ensure the type matches
    match unsafe { (*icmp_hdr).data()? } {
        Icmpv4HdrData::Timestamp(id_seq)
            | Icmpv4HdrData::TimestampReply(id_seq) => {
            let timestamps_ptr_location = icmp_start + Icmpv4Hdr::LEN;
            let timestamps: *const IcmpTimestampMsgPart =
                timestamps_ptr_location as *const IcmpTimestampMsgPart;

            let _id = id_seq.id();
            let _sequence = id_seq.sequence();
            unsafe {
                let _orig = (*timestamps).originate_timestamp();
                let _recv = (*timestamps).receive_timestamp();
                let _xmit = (*timestamps).transmit_timestamp();
                // Use the timestamp fields as needed.
            }
        },
        _ => {},
    }
    Ok(0)
}

Fields

originate_timestamp: [u8; 4]

receive_timestamp: [u8; 4]

transmit_timestamp: [u8; 4]

Implementations

impl IcmpTimestampMsgPart

pub const LEN: usize

pub fn originate_timestamp(&self) -> u32

Returns the originate timestamp in host byte order (milliseconds since midnight UT)

pub fn set_originate_timestamp(&mut self, timestamp: u32)

Sets the originate timestamp field (milliseconds since midnight UT). The value will be stored in network byte order.

pub fn receive_timestamp(&self) -> u32

Returns the receive timestamp in host byte order (milliseconds since midnight UT)

pub fn set_receive_timestamp(&mut self, timestamp: u32)

Sets the receive timestamp field (milliseconds since midnight UT). The value will be stored in network byte order.

pub fn transmit_timestamp(&self) -> u32

Returns the transmit timestamp in host byte order (milliseconds since midnight UT)

pub fn set_transmit_timestamp(&mut self, timestamp: u32)

Sets the transmit timestamp field (milliseconds since midnight UT). The value will be stored in network byte order.

Trait Implementations

impl Clone for IcmpTimestampMsgPart

fn clone(&self) -> IcmpTimestampMsgPart

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IcmpTimestampMsgPart

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

Formats the value using the given formatter.

impl<'de, WincodeConfig: Config> SchemaRead<'de, WincodeConfig> for IcmpTimestampMsgPart

const TYPE_META: TypeMeta

Metadata about the type’s serialization.

type Dst = IcmpTimestampMsgPart

fn read( reader: impl Reader<'de>, dst: &mut MaybeUninit<Self::Dst>, ) -> ReadResult<()>

Read into dst from reader.

fn get(reader: impl Reader<'de>) -> Result<Self::Dst, ReadError>

Read Self::Dst from reader into a new Self::Dst.

impl<WincodeConfig: Config> SchemaWrite<WincodeConfig> for IcmpTimestampMsgPart

const TYPE_META: TypeMeta

Metadata about the type’s serialization.

type Src = IcmpTimestampMsgPart

fn size_of(src: &Self::Src) -> WriteResult<usize>

Get the serialized size of Self::Src.

fn write(writer: impl Writer, src: &Self::Src) -> WriteResult<()>

Write Self::Src to writer.

impl<WincodeConfig: Config> ZeroCopy<WincodeConfig> for IcmpTimestampMsgPart

where for<'_wincode_internal, '_wincode_internal, '_wincode_internal> [u8; 4]: ZeroCopy<WincodeConfig>, for<'_wincode_internal> Assert<{ _ }>: IsTrue,

fn from_bytes<'de>(bytes: &'de [u8], config: C) -> Result<&'de Self, ReadError>

where Self: Sized + SchemaRead<'de, C, Dst = Self>,

Like crate::ZeroCopy::from_bytes, but allows the caller to provide a custom configuration.

fn from_bytes_mut<'de>( bytes: &'de mut [u8], config: C, ) -> Result<&'de mut Self, ReadError>

where Self: Sized + SchemaRead<'de, C, Dst = Self>,

Like crate::ZeroCopy::from_bytes_mut, but allows the caller to provide a custom configuration.

impl Copy for IcmpTimestampMsgPart