snmpwalk implementation

Dear Sir,
I have implemented netsnmp sub-agent and would like to test snmpwalk command.

Please can you suggest me that what I need to enhance in my mib file for testing snmpwalk command.

When I do snmpwalk from snmp manager it calls my sub-agent but always sends column as 3 while I have implemented code for column 1.
And I want the data of column 1 by doing snmpwalk as I am hard-coding column 1 with a array of char.

Does I need to fill back the next index in response for snmp namager or manager itself increment the index and send the getnext for snmpwalk?

Now I am using tabular object., can I test snmpwalk by using scalar objects?

I am using the following command for snmpwalk:
rio:/root/shiv/snmp> snmpgetnext -v2c -c demopublic -M /usr/share/snmp/mibs/ -m ALL localhost ARICENT-SHIV::mmeLocalDataTable.0


Please find the code snipped below:

void
initialize_table_mmeLocalDataTable(void)
{
    static oid      mmeLocalDataTable_oid[] =
        { 1, 3, 6, 1, 4, 1, 29601, 11, 2, 1, 1 };
    size_t          mmeLocalDataTable_oid_len =
        OID_LENGTH(mmeLocalDataTable_oid);
    netsnmp_handler_registration *reg;
    netsnmp_iterator_info *iinfo;
    netsnmp_table_registration_info *table_info;

    reg =
        netsnmp_create_handler_registration("mmeLocalDataTable",
                                            mmeLocalDataTable_handler,
                                            mmeLocalDataTable_oid,
                                            mmeLocalDataTable_oid_len,
                                            HANDLER_CAN_RWRITE);

}

struct mmeLocalDataTable_entry {
    /*
     * Index values
     */
    u_long          instanceId1;

    /*
     * Column values
     */
    char            UE[100];
    char            old_UE;
    u_long          old_instanceId1;
    long            mmeLocalDataTableRowStatus;

    /*
     * Illustrate using a simple linked list
     */
    int             valid;
    struct mmeLocalDataTable_entry *next;
};




    case MODE_GET:
        for (request = requests; request; request = request->next) {
           /* table_entry = (struct mmeLocalDataTable_entry *)
                netsnmp_extract_iterator_context(request);*/

            table_info = netsnmp_extract_table_info(request);
  // memset(&imsi_object_rsp, 0, sizeof(imsi_object_rsp))



            switch (table_info->colnum) {
            case COLUMN_UE:
               /*( if (!table_entry) {
                    netsnmp_set_request_error(reqinfo, request,
                                              SNMP_NOSUCHINSTANCE);
                    continue;
                }*/
    for(count = 0;count<100;count++)
    UE[count] = 'a';

                snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR,
                                         (char *)UE,
                                         sizeof(UE));
                break;
            case COLUMN_INSTANCEID1:
                if (!table_entry) {
                    netsnmp_set_request_error(reqinfo, request,
                                              SNMP_NOSUCHINSTANCE);
                    continue;
                }
                snmp_set_var_typed_value(request->requestvb, ASN_UNSIGNED,
                                         table_entry->instanceId1,
                                         sizeof(table_entry->instanceId1));
                break;
            case COLUMN_MMELOCALDATATABLEROWSTATUS:
                if (!table_entry) {
                    netsnmp_set_request_error(reqinfo, request,
                                              SNMP_NOSUCHINSTANCE);
                    continue;
                }
                snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
                                         table_entry->
                                         mmeLocalDataTableRowStatus,
                                         sizeof(table_entry->
                                                mmeLocalDataTableRowStatus));
                break;
            default:
                netsnmp_set_request_error(reqinfo, request,
                                          SNMP_NOSUCHOBJECT);
                break;
            }
        }
        break;

Please correct me wherever I am wrong and verify whether my approach is right or not, please suggest me if you feel any other better approach
for testing snmpwalk command.

Thanks & Regards,
Shiv



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