Fwd: how to Access Table data

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---------- Forwarded message ----------
From: Francois Bouchard <[email protected]>
Date: 2012/3/15
Subject: Re: how to Access Table data
To: Dave Shield <[email protected]>


oups wrong button,


> the index
> Could you help us to find table_data structure, would you

> table_data  =     netsnmp_tdata_extract_table(request);
To get the table_data, would you use

table_data  =     netsnmp_tdata_extract_table(request); ?



see example below:



2012/3/15 Francois Bouchard <[email protected]>

> Hi
> thanks
>
> the index
> Could you help us to find table_data structure, would you
>
>
> table_data  =     netsnmp_tdata_extract_table(request);
>
>
> In the following code
> /** handles requests for the mpbcRMHNotifiedNMSipAddressTable table */
>
> int mpbcRMHNotifiedNMSipAddressTable_handler(
>     netsnmp_mib_handler               *handler,
>     netsnmp_handler_registration      *reginfo,
>     netsnmp_agent_request_info        *reqinfo,
>     netsnmp_request_info              *requests)
>
>
> {
>
>     netsnmp_request_info       *request;
>     netsnmp_table_request_info *table_info;
>     netsnmp_tdata              *table_data;
>     netsnmp_tdata_row          *table_row;
>     struct mpbcRMHNotifiedNMSipAddressTable_entry *table_entry;
>
>
>     int                         ret;
>
>     switch (reqinfo->mode)
>     {
>         /*
>          * Read-support (also covers GetNext requests)
>          */
>                 case MODE_GET: // When Get/ Get(walk)/ Get Table) from Browser
>
>
>
>                         // Read Config file
>                         read_config_file(); // <-----------------------
>
>                         // Process Request
>                         for (request=requests; request; request=request->next) {
>
>
>                                 // ... etc etc etc
>
>
>                         }// for (request=request...
>                         break;
>
>         // ... etc etc etc
>
> }
>
>
> in the following function, would you recommend to pass the resquest as parameter, then extract the table_data using
>
>
> table_data = netsnmp_tdata_extract_table(request) ?
>
> void read_config_file(void ... or netsnmp_request_info *request)
> {
>         int i;
>         netsnmp_tdata_row *row;
>
>         // extract table_data ...
>
>
>
>
>         // Enter values
>         for (        i = 0,  row = netsnmp_tdata_get_first(  table_data );
>                 i < RMH_NOTIFIED_NMS_IP_MAX_ENTRIES ;
>                 ++i, row = netsnmp_tdata_get_next( table_data, row ))
>
>
>         {
>
>                 if (!row) {
>                 snmp_log(LOG_ERR, "xxxx i=%d\n", i);
>                 break;
>
>             // RMH Notified NMS Address Table index
>
>
>             row->data->mpbcRMHNotifiedNMSipAddress_Index = i;
>             row->data->mpbcRMHNotifiedNMSipAddress_IP = Tabl[i].Ip;// My table
>             // ....
>         }
> }
>
>
> Thanks,
>
>
> Francois
>
> ps Cache is not used for that table
>
>
>
>
>
> 2012/3/15 Dave Shield <[email protected]>
>
>> On 15 March 2012 13:42, Francois Bouchard <[email protected]>
>> wrote:
>> >> netsnmp_request_info  (and netsnmp_table_request_info) explicitly
>> >> refer to a particular incoming request.
>> > Yes, not with the request-related structures, more from another function
>> > like in the exampel below:
>>
>>     [ snip ]
>>
>> OK - try using the API calls
>>
>>    row = netsnmp_tdata_get_first(  table_data );
>>    row = netsnmp_tdata_get_next( table_data, row );
>>
>> to walk through the table, or one of
>>
>>    row = netsnmp_tdata_get_byidx(  table_data, indexes );
>>    row = netsnmp_tdata_get_byoid(  table_data, oids, len );
>>
>> to retrieve a particular entry
>>
>>
>> See the section 'TData API: Row operations' in the header
>> file <net-snmp/agent/table_tdata.h> for the precise declarations.
>>
>> Dave
>>
>
>

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