#define TLS_RX_LEFT_LEN(x) ((x)->rx_len - (x)->rx_offset)
#define TLS_WRITE_OFFSET(x) ((x)->write_buffer.base + (x)->write_buffer_offset)
#define TLS_RX_LEFT_LEN(x) ((x)->rx_len - (x)->rx_offset)
#define TLS_WRITE_OFFSET(x) ((x)->write_buffer.base + (x)->write_buffer_offset)