//! Fuzzes the decoder against arbitrary datagrams — the exact input an open UDP
//! port receives from the internet.
//!
//! ```sh
//! cargo +nightly fuzz run decode
//! ```
//!
//! Note the deliberate limitation: without the key, almost nothing here gets
//! past the AEAD, so this target mostly exercises `Header::peek` and the
//! ChaCha20-Poly1305 layer. The payload decoders — where the interesting
//! structural parsing lives — are reached by the `decode_payload` target
//! instead. Fuzzing only this one would give a comforting but nearly meaningless
//! coverage number.

#![no_main]

use libfuzzer_sys::fuzz_target;

/// Fixed key: a fuzzer cannot forge a tag either way, so varying it would only
/// waste the corpus.
const KEY: [u8; 32] = [0x11; 32];

fuzz_target!(|data: &[u8]| {
    let _ = otproto::Header::peek(data);
    let _ = otproto::open_message(&KEY, data);
});