Hi Wes/Parsons,
Thank you very much for your quick response.
Yes, it is very odd. Fortunately, there are some tables which still work after
upgrading from net-snmp 5.4.2 to 5.7.2.1. by comparing the bad one (ntpTable)
with one of my good ones (userTable) I noticed the differences in the code for
MODE_GET. Refer to the code in the end of this email.
Using the good one as a reference and modified the bad one it worked! But it's
still a myth to me why different version has different behavior. How should I
code better to avoid this happen again going forward when upgrading to the
newer version?
Thanks,
Gefei Jiang
The code differences:
####### for the bad one (from ntpTable)
##################################################################
/* Read-support (also covers GetNext requests) */
case MODE_GET:
for (request = requests; request; request = request->next)
{
if ((table_entry = (ntpTable_entry *)
netsnmp_extract_iterator_context (request)) == NULL ||
(table_info = netsnmp_extract_table_info (request)) == NULL)
{
netsnmp_set_request_error (reqinfo, request,
SNMP_NOSUCHINSTANCE);
return SNMP_NOSUCHINSTANCE; /* <-- the difference */
}
switch (table_info->colnum)
{
....
}
####### for the good one (from userTable
##################################################################
/* Read-support (also covers GetNext requests) */
case MODE_GET:
for (request = requests; request; request = request->next)
{
if ((table_entry = (ntpTable_entry *)
netsnmp_extract_iterator_context (request)) == NULL)
{
netsnmp_set_request_error (reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue; /* <-- the difference */
} else
switch (table_info->colnum)
{
....
}
###########################################################################################
PS: sorry I didn't get a chance to use the debug flag to get a capture since my
code has been changed
###########################################################################################
-----Original Message-----
From: Wes Hardaker [mailto:[email protected]]
Sent: Thursday, April 17, 2014 6:40 AM
To: Gefei Jiang
Cc: [email protected]
Subject: Re: Error in packet. Reason: Unknown Error with snmpwalk
Gefei Jiang <[email protected]> writes:
> When I do snmpwalk on one of my table (ntpTable) it displays
Very odd. Can you run snmpwalk with both -d and -Ddump and send us that output?
--
Wes Hardaker
Parsons
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