TCP_FASTOPEN_KEY_BUF_LENGTH
u32 user_key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(u32)];
__le32 key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(__le32)];
__u8 key[TCP_FASTOPEN_KEY_BUF_LENGTH];
optlen != TCP_FASTOPEN_KEY_BUF_LENGTH)
if (optlen == TCP_FASTOPEN_KEY_BUF_LENGTH)
u64 key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(u64)];