typedef enum { ... } SilcStreamStatus;

    Stream status.  This status is returned into the SilcStreamNotifier
    callback function to indicate the status of the stream at a given
    moment.

    typedef enum {
      SILC_STREAM_CAN_READ,         /* Data available for reading */
      SILC_STREAM_CAN_WRITE,        /* Stream ready for writing */
      SILC_STREAM_EOS,              /* End of stream */
      SILC_STREAM_CLOSED,           /* Stream is closed */
      SILC_STREAM_INVALID,          /* Stream is invalid */
      SILC_STREAM_NO_MEMORY,        /* System out of memory */
      SILC_STREAM_ERROR,            /* Unknown error */
    } SilcStreamStatus;