some questions about appending a table

I have some questions with appending a table to the snmpd.

---------------
/*
from the comment in the source code
*/

/*quote one*/
get_first_data_point
return the first set of "index" data.

get_next_data_point
return the next loop context

/*
from
http://www.net-snmp.org/dev/agent/gr..._iterator.html
*/

/*quote two*/
the get_next_data_point hook is then called repeatedly
----------------

From the quote one, I don't know what "the first set of 'index' data"
mean? The first set of "index" data point to the index

colomn data in table ,isn't it?

From the quote two, I know get_next_data_point is called repeatedly.
When will it stop?

Is there some offical document for describeing the architecture of snmpd?




/*mib definition*/
=09SeqEntry ::=3D SEQUENCE {
=09testOne=09=09DisplayString,
=09=09testTwo=09=09INTEGER
=09}

/*my added code*/
/*table structure*/
struct node
{
=09char *string;
=09long num;
=09struct node * next;
};

-------get_first_data---------

struct node *head =3D producedata();=09
netsnmp_variable_list *vptr;

*my_loop_context =3Dhead /** XXX */;
*my_data_context =3Dhead/** XXX */;

vptr =3D put_index_data;
snmp_set_var_value(vptr, (u_char *)head->string/** XXX: testOne
data */,strlen(head->string) /** XXX: length of testOne

data */);
vptr =3D vptr->next_variable;
return put_index_data;

-------get_next_data---------

struct node *tmp =3D my_loop_context;
tmp =3D tmp->next;
if(!tmp)
=09return NULL;

netsnmp_variable_list *vptr;
*my_loop_context =3D tmp/** XXX */;
*my_data_context =3D tmp/** XXX */;
vptr =3D put_index_data;
snmp_set_var_value(vptr, (u_char *)tmp->string /** XXX: testOne
data */, strlen(tmp->string) /** XXX: length of testOne

data */);
vptr =3D vptr->next_variable;
return put_index_data;


-------------------------------------------------------
SF.Net email is sponsored by:
Tame your development challenges with Apache's Geronimo App Server. Download
it for free - -and be entered to win a 42" plasma tv or your very own
Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php
_______________________________________________
Net-snmp-coders mailing list
Net-snmp-coders@lists.sourceforge.net
https://lists.sourceforge.net/lists/...et-snmp-coders