+#define TLS_RX_LEN(x) ((x)->rx_content + (x)->rx_len)
+#define TLS_RX_OFFSET(x) ((x)->rx_content + (x)->rx_offset)
+#define TLS_RX_IS_LEFT(x) ((x)->rx_len != 0 && (x)->rx_len != (x)->rx_offset)
+#define TLS_RX_LEFT_LEN(x) ((x)->rx_len - (x)->rx_offset)
+
+#define TLS_READ_OFFSET(x) ((x)->read_buffer.base + (x)->read_buffer_offset)
+#define TLS_READ_IS_LEFT(x) ((x)->read_buffer.off != 0 && (x)->read_buffer.off != (x)->read_buffer_offset)
+#define TLS_READ_LEFT_LEN(x) ((x)->read_buffer.off - (x)->read_buffer_offset)
+
+#define TLS_WRITE_OFFSET(x) ((x)->write_buffer.base + (x)->write_buffer_offset)
+#define TLS_WRITE_IS_LEFT(x) ((x)->write_buffer.off != 0 && (x)->write_buffer.off != (x)->write_buffer_offset)
+
+