Re: netsnmp_tdata * table_data structure

    [ First - *please* don't mail me privately, without copying
     any responses to the mailing list.  I don't have the time
     or inclination to offer private, unpaid, SNMP consultancy.
     Particularly at the moment, as I'm cutting down on the
     time I spend on Net-SNMP support.  Keep discussions
     to the list, where others can both learn and offer advice.
      Thanks.   ]



2008/7/17 Richard Horton <[email protected]>:

> Still having an issue though, my test code is as follows (well the
> init bit for rows)
>     for(i =0; i<ROWS_ON_STARTUP; i++) {
>        row = gdukHornetRadioTable_createEntry(table_data,i);
>        entry = row->data;
>         DEBUGMSGTL(("GDUK-HORNET-MIB","\tModifying row
>           %d/%d\n",entry->gdukHornetRadioIndex,i));
>        entry->gdukHornetRadioState = 1;
>        strcpy(entry->gdukHornetRadioName,"test");
>     }
>
> After running the code the state field correctly is returning 1 in
> response to a get on any given row (typically 32 of them), where as
> the name is returning a null string...

Do you set the length of the string values anywhere?
(i.e. entry->gdukHornetRadioName_len)


Remember that by default, the code for returning values looks
like:
      snmp_set_var_typed_value( request->requestvb,  TYPE,
                        entry->string_field,   entry->string_field_len);

so that it can handle binary string values.
If you know that all strings will definitely be printable
(and no embedded null characters), then you can tweak
this to use 'strlen(entry->string_field)' instead,
and drop the 'string_field_len' completely.


But if you're using the default code, then you need to
set the length as well as the string value.   Otherwise
this length will remain at 0, any extra characters
(i.e. all of them!) will be ignored

Dave

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