VCB structure

typedef struct query_node_all
{
   AP_UINT16       opcode;                 /* verb operation code            */
   unsigned char   reserv2;                /* reserved                       */
   unsigned char   format;                 /* reserved                       */
   AP_UINT16       primary_rc;             /* primary return code            */
   AP_UINT32       secondary_rc;           /* secondary return code          */
   unsigned char   *buf_ptr;               /* pointer to buffer              */
   AP_UINT32       buf_size;               /* buffer size                    */
   AP_UINT32       total_buf_size;         /* total buffer size required     */
   AP_UINT16       num_entries;            /* number of entries              */
   AP_UINT16       total_num_entries;      /* total number of entries        */
   unsigned char   list_options;           /* listing options                */
   unsigned char   reserv3;                /* reserved                       */
   unsigned char   node_name[128];         /* node name                      */
} QUERY_NODE_ALL;
typedef struct node_summary
{
   AP_UINT16       overlay_size;           /* size of returned entry         */
   unsigned char   node_name[128];         /* node name                      */
   unsigned char   config_role;            /* server's config file role      */
   unsigned char   reserv3[12];            /* reserved                       */
} NODE_SUMMARY;