I am using net-snmp-5-4-1. I looked at the generic helper code. In the file net-snmp-5.4.1/agent/helpers/table_generic.c
All the functions are empty. I attached the file. So I am not sure how this helper will work. My goal is very simple. I want to code a subagent to register for a mib table and be able to handle the get, getnext, set for the rows and columns in the table because the data is in the subagent not the master agent. I was able to use the following for the get and the set but not for the getnext. Meaning I can do a get on all the rows and the columns in the table, which would possibly indicate that I created the table ok and added the rows correctly. For some reason though the getnext does not work correctly: netsnmp_create_table_data_set netsnmp_table_set_add_indexes netsnmp_table_set_multi_add_default_row netsnmp_create_table_data_row netsnmp_table_row_add_index netsnmp_set_row_column netsnmp_table_dataset_add_row One of the errors I get is that instead of getting the next row of the current column - I get the next column. Also, a walk never exits the loop of getnext. So I am now using: REGISTER_MIB(...) To handle get,get next, and set. This works ok. Is this the recommended approach instead of using the helpers? Thanks, Joan Thanks, Joan -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Shield Sent: Wednesday, April 23, 2008 5:33 PM To: Joan Landry; Mike Ayers Cc: net-snmp-users@lists.sourceforge.net Subject: Re: tablesnmpwalk on table not working via subagent - need help please 2008/4/23 Mike Ayers <[EMAIL PROTECTED]>: > > I have found no information about table_dataset2 helper. Does > > this exist? No. > I suspect that it is this: > > http://www.net-snmp.org/dev/agent/group__tdata.html Not quite. The 'table_tdata' helper is a reworked version of the 'table_data' helper. Both of these represent the table as a collection of individual row data structures. The helper takes care of selecting the appropriate row from within this collection. The user-provided handler should then select the requested column value from within this data structure. The 'table_dataset' helper takes this a stage further. As well as taking care of the table as a collection of rows, it also handles each row as a collection of column values. The standard helper can therefore process an SNMP request without needing *any* user-provided handler code. The original intention of the table_dataset2' helper was to apply the same 'table_data' -> 'table_tdata' reworking to the dataset framework. But this never actually happened. > > Can anyone clarify for me which code in net-snmp works for > the > purpose of implementing a table. All of the table helpers have been used for implementing assorted tables with the Net-SNMP agent, so they should all work successfully. I still hope to look properly at the problems you have been having. > The table_dataset/group_tdata functions are for "datamatted" [sic] > tables those for which you store the data and forget. That's true for 'table_dataset', but not for 'table_tdata'. > I don't see any functions to build the rows, either. The code for building a row in a 'tdata'-based table is specific to the individual MIB table, so isn't part of the tdata helper itself. Instead it will be generated as part of the mib2c.tdata.conf template. > I suggest taking a look here: > > http://www.net-snmp.org/dev/agent/group__table__generic.html > > ...for what appears to be a more generic and complete set of functions. That's not actually a user-level table helper. It's more intended as a design framework of the API that a particular table helper should look at providing. Dave
table_generic.c
Description: table_generic.c
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