typedef enum { ... } SilcConnectionType;

    The type of the connection.

    typedef enum {
      SILC_CONN_UNKNOWN  = 0,       /* Unknown type, cannot be sent */
      SILC_CONN_CLIENT   = 1,       /* Client connection */
      SILC_CONN_SERVER   = 2,       /* Server connection */
      SILC_CONN_ROUTER   = 3        /* Router connection */
    } SilcConnectionType;