RE: Rebuilding Net-SNMP 5.4 with IPv6

As you are aware I've been trying to build with IPv6 support and get a
simple snmpwalk to succesfully complete.  It looked like Alex got this
to work, but I have not been able to.  What I've done is download the
V5-4 Patches (net-snmp-svn-V5-4-patches_20070619_0308.tar.gz) which I
believe had all the fixes.  Instead of going directly for IPv6 support,
this time I just built with my usual build procedures including OpenSSL
support.  It turns out I get the same problem without even IPv6 support
turned on.  When I simply try to run an snmpwalk I get this:

snmpwalk -v 2c -c public 10.1.1.1 ifoperstatus
Timeout: No Response from 10.1.1.1

The same command run with my build of the 5.4 release works fine
(ifOperStatus is for a Cisco switch).

Is there anything different with the V5-4 Patches that I need to know
about?  If I can get that to build correctly I can move on to test IPv6
support.

Thanks,
Justin

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
Kleffman, Justin (Mission Systems)
Sent: Thursday, June 14, 2007 3:54 PM
To: Alex Burger; Dave Shield
Cc: [email protected]
Subject: RE: Rebuilding Net-SNMP 5.4 with IPv6

Very sorry, I didn't see this message fly by.

Alex,
You have IPv6 built & working with an snmpwalk using V5-4-patches?  This
is great news, and I'll go back and retest early next week.  I assume if
I download V5-4-patches from SVN that those projects include all of the
source code for the full build?

I'll update when I see if I can get it working.  I'm not sure if I have
an IPv6 machine to test on but I just want to be able to build with IPv6
support turned on and have my IPv4 SNMP app still work.  Only then can I
move on to test actual IPv6 communication.

- Justin

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Alex
Burger
Sent: Wednesday, June 06, 2007 6:07 PM
To: Dave Shield
Cc: Kleffman, Justin (Mission Systems);
[email protected]
Subject: Re: Rebuilding Net-SNMP 5.4 with IPv6

Dave Shield wrote:
> On 26/05/07, Alex Burger <[email protected]> wrote:
>> I have not been able to get IPv6 to actually work though.  I start 
>> snmpd
>> with:
>>
>>   snmpd udpv6:161
>>
>> and it starts fine.  I do an snmpwalk with:
>>
>>   snmpwalk -v 1 -c public udpv6:[::1] system
>>
>> and I get nothing back.
> 
> What access control settings are you using?

I had rocommunity6 public defined in snmpd.conf.

The changes Magnus made (16455) fixed the problem.  I can now do a
snmpwalk using the commands above.  I tested this with V5-4-patches.

Justin, have you tried with the latest code in V5-4-patches?

Dave, I had to put an #ifndef WIN32 around the feature code 1041888 in
read_config.c:

if (!S_ISDIR(statbuf.st_mode)) {
.
.
}

Windows doesn't have S_ISDIR.  We need a proper fix, but that allowed me
to compile to test IPv6.

Alex


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