Hello,
I thought of a solution for the missing coloums problem that I stated
earlier. Before I implement I need your comments on the same.
I did some experiments with the 'netSnmpHostsTable' code that resides in
'mibgroup/examples/' directory of Net-SNMP installation directory.
I made following are the changes I made to the
'get_netSnmpHostRowStatus' function in 'netSnmpHostsTable_access.c'.
long *
get_netSnmpHostRowStatus(void *data_context, size_t * ret_len)
{
static long ret = RS_ACTIVE;
static int count = 0;
if (count == 0)
{
count++;
return (NULL);
}
*ret_len = sizeof(ret);
return &ret;
}
In this code I am making sure that agent will _NOT_ return the value for
first instance of the netSnmpHostRowStatus object.
I made following are the changes I made to the
'netSnmpHostsTable_handler' function in 'netSnmpHostsTable.c' for the
GET portion of 'COLUMN_NETSNMPHOSTROWSTATUS'
case COLUMN_NETSNMPHOSTROWSTATUS:
{
long *retval;
size_t retval_len = 0;
retval = get_netSnmpHostRowStatus (data_context,
&retval_len);
if (retval == NULL)
netsnmp_set_request_error (reqinfo,
request,
SNMP_NOSUCHINSTANCE);
else
snmp_set_var_typed_value (var, ASN_INTEGER,
(const u_char *) retval,
retval_len);
}
break;
Following is a snapshot of the snmpwalk. As seen from the output there
is no value for 'netSnmpHostRowStatus."SYSTEM-1"' column and 'snmpwalk'
retrieved values for rest of the columns.
NET-SNMP-EXAMPLES-MIB::netSnmpHostAddressType."SYSTEM-1" = INTEGER:
ipv4(1)
NET-SNMP-EXAMPLES-MIB::netSnmpHostAddressType."SYSTEM-2" = INTEGER:
ipv4(1)
NET-SNMP-EXAMPLES-MIB::netSnmpHostAddressType."SYSTEM-3" = INTEGER:
ipv4(1)
NET-SNMP-EXAMPLES-MIB::netSnmpHostAddress."SYSTEM-1" = Hex-STRING: 0A 5B
00 01
NET-SNMP-EXAMPLES-MIB::netSnmpHostAddress."SYSTEM-2" = Hex-STRING: 0A 5B
00 02
NET-SNMP-EXAMPLES-MIB::netSnmpHostAddress."SYSTEM-3" = Hex-STRING: 0A 5B
00 03
NET-SNMP-EXAMPLES-MIB::netSnmpHostStorage."SYSTEM-1" = INTEGER:
nonVolatile(3)
NET-SNMP-EXAMPLES-MIB::netSnmpHostStorage."SYSTEM-2" = INTEGER:
nonVolatile(3)
NET-SNMP-EXAMPLES-MIB::netSnmpHostStorage."SYSTEM-3" = INTEGER:
nonVolatile(3)
NET-SNMP-EXAMPLES-MIB::netSnmpHostRowStatus."SYSTEM-2" = INTEGER:
active(1)
NET-SNMP-EXAMPLES-MIB::netSnmpHostRowStatus."SYSTEM-3" = INTEGER:
active(1)
Please let me know your feedback on this change.
Another question: Can anyway I can return a 'SNMP_NOSUCHINSTANCE' code
generated in ucd-snmp style ?
Thanks
SrIdhar
PS: Both the files have following header
/*
* Note: this file originally auto-generated by mib2c using
* : mib2c.access_functions.conf,v 1.3 2003/05/31 00:11:57
hardaker Exp $ */
On Thu, 27 Jan 2005 11:50:47 +0530, "Sridhar S" <[EMAIL PROTECTED]> said:
> Robert,
>
> > Dealing with jumping to the next row would have to be handled internally
> > in the var_* routine.
>
> This means I need to handle in var_ifEntry (...) function. Right ? If
> so, I need to think of a algorithm for doing so.
>
> Thanks
> SrIdhar
>
>
> On Wed, 26 Jan 2005 15:29:20 -0500, "Robert Story" <[EMAIL PROTECTED]>
> said:
> > On Tue, 25 Jan 2005 22:17:34 -0800 Wes wrote:
> > WH> Do you have at least 2 interfaces? You'd need to if your ignoring
> > the
> > WH> first and expect results back still.
> >
> > Yes, an earlier message indicated that he did have 2 interfaces.
> >
> > WH> I'd have to study your changes in greater detail but since what
> > you're
> > WH> trying to do is a bit strange I can't say what you've done will work
> > WH> though in theory it should if you did it right.
> >
> > I don't think so. I don't think the old API handles sparse tables
> > automatically. It will handle missing columns, but not sparse tables.
> >
> > Dealing with jumping to the next row would have to be handled internally
> > in the
> > var_* routine.
> >
> > --
> > Robert Story; NET-SNMP Junkie
> > Support: <http://www.net-snmp.org/> <irc://irc.freenode.net/#net-snmp>
> > Archive:
> > <http://sourceforge.net/mailarchive/forum.php?forum=net-snmp-users>
> >
> > You are lost in a twisty maze of little standards, all different.
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