Struct Insn

pub struct Insn {
    pub opc: u8,
    pub dst: u8,
    pub src: u8,
    pub off: i16,
    pub imm: i32,
}

An eBPF instruction.

See https://www.kernel.org/doc/Documentation/networking/filter.txt for the Linux kernel documentation about eBPF, or https://github.com/iovisor/bpf-docs/blob/master/eBPF.md for a more concise version.

Fields

opc: u8

Operation code.

dst: u8

Destination register operand.

src: u8

Source register operand.

off: i16

Offset operand.

imm: i32

Immediate value operand.

Implementations

impl Insn

pub fn to_array(&self) -> [u8; 8]

Turn an Insn back into an array of bytes.

Examples

use bvm_filter::ebpf;

let prog: &[u8] = &[
    0xb7, 0x12, 0x56, 0x34, 0xde, 0xbc, 0x9a, 0x78,
    ];
let insn = ebpf::Insn {
    opc: 0xb7,
    dst: 2,
    src: 1,
    off: 0x3456,
    imm: 0x789abcde
};
assert_eq!(insn.to_array(), prog);

pub fn to_vec(&self) -> Vec<u8>

Turn an Insn into an vector of bytes.

Examples

use bvm_filter::ebpf;

let prog: Vec<u8> = vec![
    0xb7, 0x12, 0x56, 0x34, 0xde, 0xbc, 0x9a, 0x78,
    ];
let insn = ebpf::Insn {
    opc: 0xb7,
    dst: 2,
    src: 1,
    off: 0x3456,
    imm: 0x789abcde
};
assert_eq!(insn.to_vec(), prog);

Trait Implementations

impl Clone for Insn

fn clone(&self) -> Insn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Insn

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

Formats the value using the given formatter.

impl PartialEq for Insn

fn eq(&self, other: &Insn) -> 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 StructuralPartialEq for Insn