Function dtls_ccm_decrypt_message 

pub unsafe extern "C" fn dtls_ccm_decrypt_message(
    ctx: *mut rijndael_ctx,
    M: usize,
    L: usize,
    nonce: *const c_uchar,
    msg: *mut c_uchar,
    lm: usize,
    aad: *const c_uchar,
    la: usize,
) -> c_long