Re: how to get table data inside request handler

requests varibale of Watcher keeps row instead table pointer

netsnmp_extract_table_data_set(requests); returns NULL

netsnmp_extract_table_row(requests); returns valid data of row.

What should I do to put table data inside request or how to get table data
by row?

2009/2/18 Alexander Bubnov <[email protected]>

> Hello, all!
>
> Can you please let me know a way getting table data to manipulate it?
>
> below code:
>
> 1. init_tables - init tables within main function.
>
> 2. Watcher - a callback, it is called when some request is received. Inside
> of this callback I would like to change the table content before I need to
> get a pointer to the table.
>
> inside Watcher() netsnmp_extract_table_data_set() function get NULL instead
> returing data.
>
> #include<string.h>
> #include <net-snmp/net-snmp-config.h>
> #include <net-snmp/net-snmp-includes.h>
> #include <net-snmp/agent/net-snmp-agent-includes.h>
>
> const int ROWID = 2;
>
>
> static int Watcher(
>   netsnmp_mib_handler * handler
>   ,netsnmp_handler_registration * reginfo
>   ,netsnmp_agent_request_info * reqinfo
>   ,netsnmp_request_info * requests
>   )
> {
>
>   if(MODE_IS_GET(reqinfo->mode))
>   {
>   netsnmp_request_info *request;
>   int i = 0;
>
>   for(request=requests;request;request = request->next)
>   {
>   netsnmp_table_data_set*table_set =
> netsnmp_extract_table_data_set(requests);
>
>   if(table_set)
>   {
>   fprintf(stderr,"NOT NULL\n");
>
>   }
>   else
>   {
>   fprintf(stderr,"NULL\n");
>   }
>   }
>
>   return SNMP_ERR_NOERROR;
>   }
>   else if(MODE_IS_SET(reqinfo->mode))
>   {
>   puts("SET request is is not allowed");
>   return SNMP_ERR_NOTWRITABLE;
>   }
>   return SNMP_ERR_GENERR;
> }
>
>
> void init_tables()
> {
>   netsnmp_table_data_set *table_set;
>   oid some_oid[] = {1,3,6,1,4,1,23668,1025,2,8,1};
>   const char * table_name = "mytable";
>
>   const size_t size_some_oid = OID_LENGTH(some_oid);
>   int count = 999;
>   const char* pcount = (const char*)(&count);
>
>   table_set = netsnmp_create_table_data_set(table_name);
>
>   table_set->allow_creation = 0;
>
>   netsnmp_table_dataset_add_index(table_set, ASN_OCTET_STR);
>
>   netsnmp_table_set_multi_add_default_row(table_set,
>   /*
>   * column 2 = asn type,
>   * writable = 0,
>   * default value = NULL,
>   * default value len = 0
>   */
>   ROWID,ASN_COUNTER,0,NULL,0,
>   NULL /* done */ );
>
>   netsnmp_register_table_data_set(netsnmp_create_handler_registration
>   (table_name, Watcher,
>   some_oid,
>   size_some_oid,
>   HANDLER_CAN_RONLY|HANDLER_CAN_NOT_CREATE), table_set, NULL);
>
>   netsnmp_table_row *row = netsnmp_create_table_data_row();
>   netsnmp_table_row_add_index(row, ASN_OCTET_STR, "some data string",
>   strlen("some data string"));
>   netsnmp_set_row_column(row, ROWID, ASN_COUNTER,
>   pcount, sizeof(int));
>   netsnmp_mark_row_column_writable(row, ROWID, 0);
>   netsnmp_table_dataset_add_row(table_set, row);
> }
>
>
>
> --
> /BR, Alexander
>



-- 
/BR, Alexander

------------------------------------------------------------------------------
Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA
-OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise
-Strategies to boost innovation and cut costs with open source participation
-Receive a $600 discount off the registration fee with the source code: SFAD
http://p.sf.net/sfu/XcvMzF8H

_______________________________________________
Net-snmp-users mailing list
[email protected]
Please see the following page to unsubscribe or change other options:
https://lists.sourceforge.net/lists/listinfo/net-snmp-users