noise_encrypted_len
dev->needed_tailroom = noise_encrypted_len(MESSAGE_PADDING_MULTIPLE);
u8 encrypted_cookie[noise_encrypted_len(COOKIE_LEN)];
(noise_encrypted_len(plain_len) + sizeof(struct message_data))
u8 encrypted_static[noise_encrypted_len(NOISE_PUBLIC_KEY_LEN)];
u8 encrypted_timestamp[noise_encrypted_len(NOISE_TIMESTAMP_LEN)];
u8 encrypted_nothing[noise_encrypted_len(0)];
mix_hash(hash, dst_ciphertext, noise_encrypted_len(src_len));
if (pskb_trim(skb, skb->len - noise_encrypted_len(0)))
trailer_len = padding_len + noise_encrypted_len(0);
noise_encrypted_len(plaintext_len)) <= 0)