typedef struct { ... } SilcAttributeObjDevice;

    SILC_ATTRIBUTE_DEVICE_INFO type object.  The caller must free the
    strings inside the structure.

    typedef struct SilcAttributeObjDeviceStruct {
      SilcAttributeDevice type;     /* device type */
      char *manufacturer;           /* manufacturer of the device */
      char *version;                /* device version string */
      char *model;                  /* device model string */
      char *language;               /* device language (ISO 639-2/T) */
    } SilcAttributeObjDevice;