2 releases (1 stable)
1.0.0 | Apr 18, 2022 |
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#2076 in Parser implementations
83KB
743 lines
bpfasm
Berkley Packet Filter (BPF) assembler
Author: Alex Forster <alex@alexforster.com>
License: MIT OR Apache-2.0
Example Usage
let source = r#"
ldh [12] ; load ethertype into accumulator
jne #0x0800, drop ; if accumulator != 0x0800: goto drop
ldb [23] ; load ipproto into accumulator
jneq #0x06, drop ; if accumulator != 0x06: goto drop
pass: ret #-1 ; pass
drop: ret #0 ; drop
"#;
let extensions = bpfasm::extensions::linux();
let instructions = bpfasm::assemble(source, &extensions).expect("syntax error");
println!(
"{},{}",
instructions.len(),
instructions.iter().map(|s| s.to_string()).collect::<Vec<_>>().join(",")
);
// Output:
// 6,40 0 0 12,21 0 3 2048,48 0 0 23,21 0 1 6,6 0 0 4294967295,6 0 0 0
Dependencies
~1.8–2.6MB
~52K SLoC