FW: table dataset iteration not working

Hi All,

 

The dot3StatsTable does not have all columns in sequence (meaning, we have column 1 - index, column 2 - 11, 13, 16-21 so columns at 12, 14 and 15 index are missing). In my code (given in below mail) I am handling those invalid columns by not calling netsnmp_set_row_column() for them. But in the snmpwalk result the get-next is terminating at 11th column since it cannot find the column at 12th index (oid = 1.3.6.1.2.1.10.7.2.1.12). Do I need to call netsnmp_set_row_column() for even the invalid column indices? 

 

Thanks,
Watsh

 

________________________________

From: Watsh Rajneesh 
Sent: Thursday, November 13, 2008 3:36 PM
To: 'Suresh Bikmal'
Subject: RE: table dataset iteration not working

 

Hi Suresh,

 

There is another issue. The dot3StatsTable does not have all columns in sequence (meaning, we have column 1 - index, column 2 - 11, 13, 16-21 so columns at 12, 14 and 15 index are missing). In my code (given in below mail) I am handling those invalid columns by not calling netsnmp_set_row_column() for them. But in the snmpwalk result the get-next is terminating at 11th column since it cannot find the column at 12th index (oid = 1.3.6.1.2.1.10.7.2.1.12). Do I need to call netsnmp_set_row_column() for even the invalid column indices?

 

Thanks,
Watsh

 

________________________________

From: Watsh Rajneesh 
Sent: Thursday, November 13, 2008 3:28 PM
To: 'Suresh Bikmal'
Subject: RE: table dataset iteration not working

 

Thanks Suresh. It worked :-). I just had to comment out the index column from the netsmp_table_set_multi_add_default_row () method as you rightly pointed out.

 

Regards,

Watsh

________________________________

From: Suresh Bikmal [mailto:[email protected]] 
Sent: Thursday, November 13, 2008 2:28 PM
To: Watsh Rajneesh
Subject: Re: table dataset iteration not working

 

Rajneesh,

what version of net-snmp are you using?

try this: 
when you call the api, netsnmp_table_set_multi_add_default_row in the initialize_table_dot3StatsTable method,
do not pass the first index column. just give the details of the non-index columns.

let me know how it goes.

Have a nice time,
-Suresh

 

 

________________________________

From: Watsh Rajneesh <[email protected]>
To: [email protected]
Sent: Tuesday, November 11, 2008 6:01:24 PM
Subject: table dataset iteration not working

Hi All,

 

I generated my table code using the mib2c.create_dataset.conf configuration. The get on a column works but the get-next/snmpwalk does not work. I compared my code with the agent/mibgroup/data_set.c source and it seems to be no different. Can someone please shed some light on what’s missing in my code below for the table iteration to work?

 

 

void

initialize_table_dot3StatsTable(void)

{

    static oid dot3StatsTable_oid[] = {1,3,6,1,2,1,10,7,2};

    size_t dot3StatsTable_oid_len = OID_LENGTH(dot3StatsTable_oid);

    netsnmp_table_data_set *table_set;

      netsnmp_table_row *row;

      // variables declared - wrajnees

      static int _max_cols = 21; // there are 18 columns in this table.

      int column = 0;

      int index = 1;

      int val = 20;

      static oid      objid_etherchipset[] = { 0 };     /* snmpTrapIOD.0 */

 

      // end variables declared.

 

    /* create the table structure itself */

    table_set = netsnmp_create_table_data_set("dot3StatsTable");

 

    /* comment this out or delete if you don't support creation of new rows */

      

    table_set->allow_creation = 1;

 

    /***************************************************

     * Adding indexes

     */

    DEBUGMSGTL(("initialize_table_dot3StatsTable",

                "adding indexes to table dot3StatsTable\n"));

 

    netsnmp_table_set_add_indexes(table_set,

                           ASN_INTEGER,  /* index: dot3StatsIndex */

                           0);

 

      

    DEBUGMSGTL(("initialize_table_dot3StatsTable",

                "adding column types to table dot3StatsTable\n"));            

    netsnmp_table_set_multi_add_default_row(table_set,

                                            COLUMN_DOT3STATSINDEX, ASN_INTEGER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSALIGNMENTERRORS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSFCSERRORS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSSINGLECOLLISIONFRAMES, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSMULTIPLECOLLISIONFRAMES, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSSQETESTERRORS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSDEFERREDTRANSMISSIONS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSLATECOLLISIONS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSEXCESSIVECOLLISIONS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSINTERNALMACTRANSMITERRORS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSCARRIERSENSEERRORS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSFRAMETOOLONGS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSINTERNALMACRECEIVEERRORS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSETHERCHIPSET, ASN_OBJECT_ID, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSSYMBOLERRORS, ASN_COUNTER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSDUPLEXSTATUS, ASN_INTEGER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSRATECONTROLABILITY, ASN_INTEGER, 0,

                                            NULL, 0,

                                            COLUMN_DOT3STATSRATECONTROLSTATUS, ASN_INTEGER, 0,

                                            NULL, 0,

                              0);

 

 

    

    /* registering the table with the master agent */

    /* note: if you don't need a subhandler to deal with any aspects

       of the request, change dot3StatsTable_handler to "NULL" */

    netsnmp_register_table_data_set(netsnmp_create_handler_registration("dot3StatsTable", NULL,

                                                        dot3StatsTable_oid,

                                                        dot3StatsTable_oid_len,

                                                        HANDLER_CAN_RONLY),

                            table_set, NULL);

      // Add code - wrajnees

 

      /*

     * create the a row for the table, and add the data 

     */

    row = netsnmp_create_table_data_row();

      /*

     * set the index to the IETF WG name "snmpv3" 

     */

    netsnmp_table_row_add_index(row, ASN_INTEGER, (u_char*)&index, sizeof(index));

      /*

     * set the column 2 and above

     */

      for (column = 2; column <= _max_cols; column++) {

            // Following columns are not valid.

            switch(column) {

                  case 12: // INVALIDs

                  case 14:

                  case 15:

                        break;

                  case 17: // OID

                        netsnmp_set_row_column(row, column, ASN_OBJECT_ID,

                                             (u_char*)objid_etherchipset, 1*sizeof(oid));

                        break;

                  case 19: // INTEGER

                  case 21:

                        netsnmp_set_row_column(row, column, ASN_INTEGER,

                                             (u_char*)&val, sizeof(val));     

                        break;

                  case 20: // TRUTH_VALUE

                        netsnmp_set_row_column(row, column, ASN_INTEGER,

                                             (u_char*)&val, sizeof(val));     

                        break;

                  default: // COUNTER

                        netsnmp_set_row_column(row, column, ASN_COUNTER,

                                             (u_char*)&val, sizeof(val));     

                        break;

            }

 

 

      }

      /*

       * add the row to the table 

       */

      netsnmp_table_dataset_add_row(table_set, row);

 

      /*

     * Finally, this actually allows the "add_row" token it the

     * * snmpd.conf file to add rows to this table.

     * * Example snmpd.conf line:

     * *   add_row netSnmpIETFWGTable eos "Glenn Waters" "Dale Francisco"

     */

    netsnmp_register_auto_data_table(table_set, NULL);

 

      // End add code - wrajnees

}

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