typedef struct { ... } SilcIDCacheEntry;

    This is one entry in the SILC ID Cache system. Contents of this is
    allocated outside the ID cache system, however, all the fields are
    filled with ID cache utility functions. The ID cache system does not
    allocate any of these fields nor free them.

    void *id

      The actual ID.

    char name

      A name associated with the ID.

    SilcUInt32 expire

      Time when this cache entry expires.  This is normal time() value
      plus the validity.  Cache entry has expired if current time is
      more than value in this field.  If this value is zero (0) the
      entry never expires.

    void *context

      Any caller specified context.

    typedef struct {
      void *id;
      char *name;
      SilcUInt32 expire;
      void *context;
    } *SilcIDCacheEntry;