Struct ZeroCopySend 

pub struct ZeroCopySend { /* private fields */ }

Zero-copy send operation using scatter-gather DMA.

Collects data segments (from user pages or kernel buffers) into a scatter-gather list and transmits them through the network device.

Implementations

impl ZeroCopySend

pub fn new() -> Self

Create new zero-copy send

pub fn add_kernel_buffer(&mut self, phys_addr: u64, length: usize)

Add data from a kernel physical address range.

pub fn add_user_buffer( &mut self, user_addr: u64, length: usize, ) -> Result<(), KernelError>

Add data from user buffer (zero-copy via page pinning).

Translates user virtual addresses to physical addresses by walking the current process’s page tables. Each page the buffer spans becomes a separate scatter-gather segment so that physically discontiguous user pages can be transmitted without copying.

pub fn on_complete(&mut self, callback: fn())

Set completion callback

pub fn sg_list(&self) -> &ScatterGatherList

Get a reference to the scatter-gather list

pub fn execute(&self) -> Result<(), KernelError>

Execute send through the network device.

Assembles the scatter-gather list into a contiguous packet and transmits it via the default network device. If no hardware scatter-gather support is available, falls back to a copy-based path.

Trait Implementations

impl Default for ZeroCopySend

fn default() -> Self

Returns the “default value” for a type.