FW: Iterate option is unable to retreive the first index column v alues.

Sorry,

Forgot to mention that Column No. 1 is missing in output.

Even a get or getnext request doesn't work.

Thanks
Rohini


>  -----Original Message-----
> From: 	Rohini V  
> Sent:	Friday, September 30, 2005 1:19 PM
> To:	Sourceforgenet (E-mail)
> Subject:	Iterate option is unable to retreive the first index column
> values.
> 
> 
> Hi 
> 
> There exists a table with 2 indices. Totally the table posseses 5 columns,
> out of which first 2 columns are indexes.
> 
> I am using a structure to retrieve these 2 indexes.
> 
> The structure is declared as :
> /*
>  * This structure has a specific purpose.
>  * Used only with tables which have 2 indexes.
>  */
> struct indexData{
>     int min1;    // min value for index 1
>     int min2;    // min value for index 2
>     int max1;   // max value for index 1
>     int max2;   // max value for index 2
>     int start1;   // start point of min value for index 1
>     int start2;   // start point of min value for index 2
>     int size;     // overall size of container
> };
> 
> typedef struct indexData otherData;
> 
> 
> The get_first and get_next hooks are like this :
> 
> netsnmp_variable_list *
> exampleTable_get_first_data_point(void **my_loop_context,
>                                          void **my_data_context,
>                                          netsnmp_variable_list *
>                                          put_index_data,
>                                          netsnmp_iterator_info *mydata)
> {
>     otherData* rest = exampleTable_other;
> 
>     printf("Inside Function %s\n", __FUNCTION__);
> 
>     if ( rest->start1 <= 0 || rest->start2 <= 0 )
>         return NULL;
> 
>     rest->min1 = rest->start1;
>     rest->min2 = rest->start2;
> 
>     *my_loop_context = (void *) rest;
>     *my_data_context = (void *) rest;
> 
>     return exampleTable_get_next_data_point(my_loop_context,
>                                                    my_data_context,
>                                                    put_index_data,
> mydata);
> }
> 
> 
> netsnmp_variable_list *
> exampleTable_get_next_data_point(void **my_loop_context,
>                                         void **my_data_context,
>                                         netsnmp_variable_list *
>                                         put_index_data,
>                                         netsnmp_iterator_info *mydata)
> {
>     otherData* rest;
>     netsnmp_variable_list *idx = put_index_data;
> 
>     printf("Inside Function %s\n", __FUNCTION__);
> 
>     rest = ( otherData * ) *my_loop_context ;
> 
>     if ( rest->min1 > rest->max1 || rest->min2 > rest->max2 )
>         return NULL;
> 
>     snmp_set_var_value(idx, (u_char *) &rest->min1,
>                                 sizeof(rest->min1));
>     idx = idx->next_variable;
> 
>     snmp_set_var_value(idx,(u_char *) &rest->min2,
>                                 sizeof(rest->min2));
>     idx = idx->next_variable;
> 
>     *my_loop_context = (void *) rest;
>     *my_data_context = (void *) rest;
> 
>     rest->min1++;
>     rest->min2++;
> 
>     return put_index_data;
> }
> 
> And the handler is :
> 
> int
> exampleTable_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_variable_list * var;
>     otherData *rest;
> 
>     static oid      exampleTableEntry_oid[] =
>         { 1, 3, 6, 1, 4, 1, 1872, 2, 5, 6, 2, 4, 1 };
> 
>     unsigned int column_oid_len =
>                         OID_LENGTH(exampleTableEntry_oid) + 3;
>     oid column_oid[column_oid_len];
>     int iteridx1, iteridx2, rc = 0, foundit = 0;
>     char *str, *temp;
>     unsigned int hashVal = -1, value = 0;
>     Data* ip;
> 
>     printf("Inside Function %s\n", __FUNCTION__);
>     switch (reqinfo->mode) {
>         /*
>          * Read-support (also covers GetNext requests)
>          */
>     case MODE_GET:
>         for (request = requests; request; request = request->next) {
>             var = request->requestvb;
>             printf("req oid = ");
>             print_oid( var->name, var->name_length );
> 
>             rest = (otherData *)
> netsnmp_extract_iterator_context(request);
>             if( rest == NULL )
>             {
>                 printf("table_entry is NULL\n");
>                 return SNMP_NOSUCHINSTANCE;
>             }
> 
>             table_info = netsnmp_extract_table_info(request);
>             if ( table_info == NULL )
>                 continue;
> 
>             rc = append_to_oid_sec( column_oid,
>                                 bwmStatPortTcrTableEntry_oid,
>                                 column_oid_len-3,
>                                 table_info->colnum,
>                                 var->name[var->name_length-2],
>                                 var->name[var->name_length-1]  );
>             hashVal = APHash( column_oid, column_oid_len );
>             ip = traverse_table_container( bwmStatPortTcrTable_container,
>                                            rest->size,
>                                            hashVal );
>             foundit = HASH_EQUALS( ip->key, hashVal );
>             if ( foundit )
>             {
>                 temp = (char*) ip->value;
>                 printf("temp val = %s\n", temp);
>                 iteridx1 = *table_info->indexes->val.integer ;
>                 iteridx2 =
> *table_info->indexes->next_variable->val.integer ;
>                 printf("iteridx1, 2 = %d, %d\n", iteridx1, iteridx2);
>             }
>             else
>             {
>                 printf("Unable to trace the req oid\n");
>                 return;
>             }
> 
>             printf("colnum = %d\n", table_info->colnum);
>             switch (table_info->colnum) {
>             case COLUMN_EXAMPLEPORTINDEX:
>                 printf("col1->indx\n");
>                 snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
>                                          (u_char*) &iteridx1,
>                                          sizeof(iteridx1));
>                 break;
> 
>             case COLUMN_EXAMPLECONTRACTINDEX:
>                 printf("col2->indx\n");
>                 snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
>                                          (u_char*) &iteridx2,
>                                          sizeof(iteridx2));
>                 break;
> 
>             case COLUMN_EXAMPLENAME:
>                 snmp_set_var_typed_value(request->requestvb,
> ASN_OCTET_STR,
>                                          temp, strlen(temp) );
>                 break;
> 
>             case COLUMN_EXAMPLERATE:
>                 value = atoi(temp);
>                 snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
>                                          (u_char*) &value,
>                                          sizeof(value));
>                 break;
> 
>             case COLUMN_EXAMPLEOUTOCT:
>                 value = atoi(temp);
>                 snmp_set_var_typed_value(request->requestvb, ASN_COUNTER,
>                                          (u_char*) &value,
>                                          sizeof(value));
>                 break;
>             }
>         }
>         break;
>     }
>     return SNMP_ERR_NOERROR;
> }
> 
> Now, when I perform a snmp walk, or snmp get next , or snmp get ,
> I can only see the values from column 2. The column is always missing.
> 
> The data are all displayed correctly.
> I dont understand what's going wrong.
> 
> Please help.......
> 
> Thanx in advance.
> 
> Regards,
> Rohini
> 
> 
> 




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