-#define SILC_SF_INBUF_PENDING 1
-#define SILC_SF_OUTBUF_PENDING 2
-#define SILC_SF_DISCONNECTING 3
-#define SILC_SF_DISCONNECTED 4
-#define SILC_SF_HOST_LOOKUP 5
+#define SILC_SF_INBUF_PENDING 1 /* data in inbound buffer */
+#define SILC_SF_OUTBUF_PENDING 2 /* data in outbound buffer */
+#define SILC_SF_DISCONNECTING 3 /* socket disconnecting */
+#define SILC_SF_DISCONNECTED 4 /* socket disconnected */
+#define SILC_SF_HOST_LOOKUP 5 /* performing host lookup for socket */
+#define SILC_SF_DISABLED 6 /* socket connection is disabled,
+ no data is sent or received. */