+/* DSI session State flags */
+#define DSI_DATA (1 << 0) /* we have received a DSI command */
+#define DSI_RUNNING (1 << 1) /* we have received a AFP command */
+#define DSI_SLEEPING (1 << 2) /* we're sleeping after FPZzz */
+#define DSI_DISCONNECTED (1 << 3) /* we're in diconnected state after a socket error */
+#define DSI_DIE (1 << 4) /* SIGUSR1, going down in 5 minutes */
+#define DSI_NOREPLY (1 << 5) /* in dsi_write we generate our own replies */
+