net-snmp-coders — Discussion of internal project coding (Please use this OR -users, NOT both!)

Re: Using C multiple OIDS in a single ASYNC packet.

[Daniel L. N. <dne...@jp...>]

Neil,
  Thanks! It does appear a lot simplier than snmpdf.c which stacks the
commands in a variable via the add() call.

  To the "larger" question. Is there any docs on these calls or are they in
"true engineering spirit" self documenting code?  8~)

Thanks,
Daniel L. Needles

----- Original Message -----
From: <ni...@ba...>
To: <dne...@jp...>; <net...@li...>
Sent: Sunday, November 19, 2000 1:05 AM
Subject: Re: Using C multiple OIDS in a single ASYNC packet.


> On Sat, 18 Nov 2000 08:28:41 -0800 "Daniel L. Needles" <dne...@jp...>
wrote:
> >However, after viewing the readmes, tutorials, library tutorials, etc, I
could
> > find no documentation on how to place more than one request in a packet.
> > Worse, snmp_pdu_create(), snmp_add_null_var() were not documented in the
> > library tutorial. I attempted to look at the APPS under apps but
> > couldn't quickly find one with multiple requests.
>
> Its really very simple. Call snmp_pdu_create to get an empty pdu, then
call
> snmp_add_null_var for each oid. If you check apps/snmpget, it just does
that
> for each oid present in the command line.
>
> /Niels
>
> --
> Get your firstname@lastname email for FREE at http://Nameplanet.com/?su
>

Re: Using C multiple OIDS in a single ASYNC packet.

[<ni...@ba...>]

On Sat, 18 Nov 2000 08:28:41 -0800 "Daniel L. Needles" <dne...@jp...> wrote:
>However, after viewing the readmes, tutorials, library tutorials, etc, I could 
> find no documentation on how to place more than one request in a packet.
> Worse, snmp_pdu_create(), snmp_add_null_var() were not documented in the
> library tutorial. I attempted to look at the APPS under apps but
> couldn't quickly find one with multiple requests.

Its really very simple. Call snmp_pdu_create to get an empty pdu, then call 
snmp_add_null_var for each oid. If you check apps/snmpget, it just does that 
for each oid present in the command line.

/Niels

-- 
Get your firstname@lastname email for FREE at http://Nameplanet.com/?su

Re: Using C multiple OIDS in a single ASYNC packet.

[Daniel L. N. <dne...@jp...>]

Michael,
  Thanks for your help. I found the utility in 4.1.2 PRE1 (its not in 4.1.2
PRE 2).  It appears at the heart snmp_parse_oid is a wrapper around
read_objid for the oid setup and then snmp_add_null_var is used to stack the
oids.

It's still rather fuzzy.  Do you know of any docs anywhere describing how
these C functions work?

Thanks,
Daniel L. Needles

----- Original Message -----
From: Michael J. Slifcak <msl...@is...>
To: Daniel L. Needles <dne...@jp...>
Sent: Saturday, November 18, 2000 9:42 AM
Subject: Re: Using C multiple OIDS in a single ASYNC packet.


> "Daniel L. Needles" wrote:
> >
> > Hello,
> >   I'm attempting to make a program that hits multiple OIDS on a single
> > async request.  Thanks to the tutorial the ASYNC part was easy.
> >
> > However, after viewing the readmes, tutorials, library tutorials, etc,
> > I could find no documentation on how to place more than one request in
> > a packet. Worse, snmp_pdu_create(), snmp_add_null_var() were not
> > documented in the library tutorial. I attempted to look at the APPS
> > under apps but couldn't quickly find one with multiple requests.
> >
> > In an effort to not reinvent the wheel. Are these functions documented
> > anywhere? Does someone have an example of this?
> >
> > Thanks,
> > Daniel L. Needles
>
>
> Look at the apps/snmpdf.c source.  It might exhibit some
> useful constructs that you can apply.
>
> Best Regards,
> -Mike Slifcak, Internet Security Systems, Inc.
>

Using C multiple OIDS in a single ASYNC packet.

[Daniel L. N. <dne...@jp...>]

Hello,
  I'm attempting to make a program that hits multiple OIDS on a single =
async request.  Thanks to the tutorial the ASYNC part was easy.=20

However, after viewing the readmes, tutorials, library tutorials, etc, I =
could find no documentation on how to place more than one request in a =
packet. Worse, snmp_pdu_create(), snmp_add_null_var() were not =
documented in the library tutorial. I attempted to look at the APPS =
under apps but couldn't quickly find one with multiple requests.

In an effort to not reinvent the wheel. Are these functions documented =
anywhere? Does someone have an example of this?

Thanks,
Daniel L. Needles

4.2.pre2 available

[Wes H. <wjh...@uc...>]

ucd-snmp-4.2.pre2 is now available at
http://download.sourceforge.net/net-snmp/ucd-snmp-4.2.pre2.tar.gz.

We'd greatly appreciate people testing it and letting us know of any
problem that still exist.

Misc recent changes:

- It's support for AgentX should be greatly improved
- "make test" suite now has 31 tests (some require specific mib
  modules to be compiled in or else they may be skipped).

-- 
Wes Hardaker
Please mail all replies to net...@li...

Re: Regarding usage of pass directive in snmpd.conf file.

[Sumathi G. <su...@cc...>]

But the command 'snmptranslate -On -IR unknown'
gives the correct result :'enterprises.ucdavis.ucdSnmpAgent.unknown'
!! If snmptranslate is looking up the correct MIB table, why not 
snmpwalk/snmpget ??!!

Thanks,
Sumathi

Sumathi Gopal wrote:

> Hello UCD-SNMP coders,
> I'm trying to write an extension on the UCD-SNMP agent. Presuming 
> snmpd.conf to be a good start, I uncommented the 'pass' directive, and 
> set the correct path to the program - passtest.
> 
> is this all that has to be done for 'snmpwalk' & 'snmpget' to give the 
> desired results ?? well.. it did'nt work for me!
> 
> I started the agent with the command
> 'snmpd -DL -c /etc/snmp/snmpd.conf'
> 
> The lines displayed did indicate that it was parsing all the MIB files, 
> and also reading /etc/snmp/snmpd.conf .
> 
> but then in response to the command:
> 'snmpget -v 1 localhost public .1.3.6.1.4.1.2021.255.5'
> I'm getting the error message :
> "Error in packet
>  Reason: (noSuchName) There is no such variable name in this MIB.
>  This name doesn't exist: enterprises.ucdavis.255.5
> "
> 
> on issuing 'snmpwalk -v 1 localhost public .1.3.6.1.4.1.2021.255'
> just getting a single line of output - 'End of MIB'
> 
> 
> Please advise!!
> 
> Thanking you,
> 
> Sumathi Gopal
> 
> Research Associate,
> C&C Research Labs,
> NEC USA Inc.
> Princeton, NJ.

Regarding usage of pass directive in snmpd.conf file.

[Sumathi G. <su...@cc...>]

Hello UCD-SNMP coders,
I'm trying to write an extension on the UCD-SNMP agent. Presuming 
snmpd.conf to be a good start, I uncommented the 'pass' directive, and 
set the correct path to the program - passtest.

is this all that has to be done for 'snmpwalk' & 'snmpget' to give the 
desired results ?? well.. it did'nt work for me!

I started the agent with the command
'snmpd -DL -c /etc/snmp/snmpd.conf'

The lines displayed did indicate that it was parsing all the MIB files, 
and also reading /etc/snmp/snmpd.conf .

but then in response to the command:
'snmpget -v 1 localhost public .1.3.6.1.4.1.2021.255.5'
I'm getting the error message :
"Error in packet
  Reason: (noSuchName) There is no such variable name in this MIB.
  This name doesn't exist: enterprises.ucdavis.255.5
"

on issuing 'snmpwalk -v 1 localhost public .1.3.6.1.4.1.2021.255'
just getting a single line of output - 'End of MIB'


Please advise!!

Thanking you,

Sumathi Gopal

Research Associate,
C&C Research Labs,
NEC USA Inc.
Princeton, NJ.

Re: Latest AgentX fixes

[Wes H. <wjh...@uc...>]

>>>>> On Fri, 17 Nov 2000 14:54:26 +0000, Dave Shield <D.T...@cs...> said:

Dave> Wes - can you please apply the attached patch before rolling out 4.2.pre2

Of course!  I've just applied it and will commit it momentarily.

-- 
Wes Hardaker
Please mail all replies to net...@li...

Re: recent range checking additions...

[Wes H. <wjh...@uc...>]

>>>>> On 17 Nov 2000 08:14:52 -0000, ni...@ba... (Niels Baggesen) said:

Niels> Yes, I want it to do that too, but your threat about a pre2
Niels> made me do the check-in, so that I could get some more testers.

:-)  I noticed the problem because it broke some of the recent testing
scripts I've written...

Niels> I will see if I can fix it this evening.

Ok.

I'll probably release pre2 today anyway regardless of whether or not
you get the fix in...

By the way, I've been meaning to look into the quote parsing as well,
because it doesn't work anymore either...

% ./snmpget localhost vacmGroupName.3.\"wes\"
vacmGroupName.3."wes": Unknown Object Identifier (Index: vacmSecurityName, "wes", 3 -1)

-- 
Wes Hardaker
Please mail all replies to net...@li...

Latest AgentX fixes

[Dave S. <D.T...@cs...>]

OK - I've done some further work on the AgentX request handling,
with a reasonable amount of success.

  Jim - I believe the attached patch should correct deal with both
valid and invalid SET requests.   I've tried

		set sysContact.0 s "me"
		set sysContact.0 i 9999

and the subagent seems to behave in the same way as the master.


  Didier/Jargot - I believe the attached patch should also fix the
memory leaks.   I ran a loop of 50 get/valid set/invalid set requests,
and the memory used by the master agent at the end, was the same as
that at the beginning.


  Wes - can you please apply the attached patch before rolling out 4.2.pre2


Now I simply mustn't forget to attach the patch!

Dave

Re: Help needed on mib2c

[Dave S. <D.T...@cs...>]

> Can anyone please help me on the mib2c compile script.
> 
> In the readme file something is said about the version of SNMP.pm
> Version 1.8 is not found at the following site.
> 
> http://www.cpan.org/modules/by-module/SNMP/

The version of the Perl SNMP module, appropriate for a particular
release of the mib2c script, can be found as part of the main UCD
distribution, within the 'perl' subdirectory.

I need to update the FAQ to mention this - thanks for the reminder.

Dave

RE: Help needed on mib2c

[RADMAN S. <Ste...@CT...>]

http://www.cpan.org/modules/by-module/SNMP/GSM/
<http://www.cpan.org/modules/by-module/SNMP/GSM/> 
 
contains what you are looking for.
 
Stefan

-----Original Message-----
From: Ruud Wetzels [mailto:ruu...@te...]
Sent: Thursday, 16 November, 2000 12:41
To: ucd...@uc...
Subject: Help needed on mib2c


Hello,
 
Can anyone please help me on the mib2c compile script.
 
In the readme file something is said about the version of SNMP.pm
Version 1.8 is not found at the following site.
 
http://www.cpan.org/modules/by-module/SNMP/
<http://www.cpan.org/modules/by-module/SNMP/> 
 
version 3.1 gives problems finding Oid's
 
 
 
 
Ruud Wetzels
Technolution bv
+31182534100
ruu...@te... <mailto:ruu...@te...> 
www.technolution.nl <http://www.technolution.nl> 

Re: Help needed

[Dave S. <D.T...@cs...>]

> Could someone read the lines I have added, and validate or reject them?

I haven't worked through this in detail yet, but I think it's more or
less correct.  At one point we _were_ freeing this structure as part of
removing a request (actually as part of 'free_agentx_request' which
feels "right"), but doing so regardless of the PDU/pass combination.
This fixed the memory leak, but meant the agent crashed on (valid) SETs!


Your code is essentially doing the same thing, but properly this time.
I still need to fix the handling of failed SETs, and check things work
properly with that (and I'd like to tweak the way your code works a bit,
to simplify maintentance), but thanks for tracking this down.


> I guess there is the same kind of memory leak for the GETBULK.

Well, yes, in theory.  But the UCD agent implements the GETBULK (SNMP)
request as a series of (AgentX) GETNEXT requests.  The AgentX GETBULK
request is never issued by the current UCD master (though the subagent
ought to handle it correctly).

  I'll make a note to bear this in mind if the master agent is ever
extended along these lines.

Dave

Help needed

[Jargot J. <Jer...@fe...>]

   Version : UCD-SNMP version 4.2.pre1
   System : SunOS 5.7 Generic_106541-08 sun4u sparc SUNW,Ultra-250

   Hi !

I am not sure to understand the ucd-snmp source files. I tried to fix the memory leak of agentx at the master agent side ; for the GET, GETNEXT,and the SET.
I have to test seriously my fix, but it seems to work. The leak vanishes and nothing is crashing.

Could someone read the lines I have added, and validate or reject them?

I'm building a test and I'm still looking for other memory leaks. I guess there is the same kind of memory leak for the GETBULK.

In the agent/mibgroup/agentx/master_request.c, there is the function remove_outstanding_request(...) defined as follow:

int
remove_outstanding_request( struct agent_snmp_session *asp, int reqid )
{
    struct request_list     *req, *prev;
    for (req = asp->outstanding_requests, prev=NULL ;
			req != NULL ;
			prev = req , req = req->next_request ) {
	if ( req->request_id == reqid) {
	    if ( prev )
		prev->next_request = req->next_request;
	    else
		asp->outstanding_requests = req->next_request;
	    free_agentx_request( req );
	    return 0;
	}
    }
    return 1;
}


replace this function by these new lines:


int
remove_outstanding_request( struct agent_snmp_session *asp, int reqid )
{
    struct request_list     *req, *prev;
	
    for (req = asp->outstanding_requests, prev=NULL ;
			req != NULL ;
			prev = req , req = req->next_request ) {
	if ( req->request_id == reqid) {
	    if ( prev )
		prev->next_request = req->next_request;
	    else
		asp->outstanding_requests = req->next_request;

	    /*
	     * Jerome Jargot FERMA SA - FIX for memory leak of SET, GET, and GETNEXT
	     */
	    if (req)
	    {
	        if (req->cb_data)
		{
		    if (req->pdu) 
		    {
		        switch ( req->pdu->command )
			{
			    case SNMP_MSG_GET:
			    case AGENTX_MSG_GET:
			    case AGENTX_MSG_GETNEXT:
			        /* It is the single pass of a GET or a GETNEXT*/
			        free_agentx_varlist((struct ax_variable_list*)req->cb_data);
			        req->cb_data = NULL;
				break;

			    case SNMP_MSG_SET:
			        if (asp->mode == FREE || asp->mode == UNDO || asp->mode == COMMIT)
			        {
				    /* It is the last pass of a SET */
                    		    free_agentx_varlist((struct ax_variable_list*)req->cb_data);
				    req->cb_data = NULL;
			        }
			        break;

			    default:
				break;
			}
		    }
		    else 
		    {
		        /* +  It seems to work
			   ++ memory leak still appeared in a 'top' if req->cb_data
			      is not freed in this case */
                        free_agentx_varlist((struct ax_variable_list*)req->cb_data);
			req->cb_data = NULL;
		    }
		}
	    }
	    /*
	     * END - FIX for memory leak of SET, GET, and GETNEXT
	     */
	    
	    free_agentx_request( req );
		
	    return 0;
	}
    }
    return 1;
}



Please help me and tell me if these new lines make sense.


thanks 

    Jerome

Re: recent range checking additions...

[<ni...@ba...>]

On 16 Nov 2000 18:00:41 -0800 Wes Hardaker <wjh...@uc...> wrote:
>
>Niels, somehow this isn't correct:
>
>  % ../apps/snmpset localhost ucdavis.254.8.0 i 4
>  ucdavis.254.8.0: Bad value notation (Type of object is not INTEGER) 
>
>It shouldn't know what the type of that node is, since its in the
>unregistered mib tree area...

I thought I had taken care of what happened when you exit the tree, but
apparently not always. I will check into it.

>Wouldn't it also be nice if you mentioned what type it was expecting,
>rather than the type you specified?
>
>  5:58pm homestyle [291]: ../apps/snmpset localhost sysContact.0 i 4
>  sysContact.0: Bad value notation (Type of object is not
INTEGER)                
>Something like:
>
>  5:58pm homestyle [291]: ../apps/snmpset localhost sysContact.0 i 4
>  sysContact.0: Bad value notation (Type of object is OCTET STRING, not
INTEGER)          

Yes, I want it to do that too, but your threat about a pre2 made me do the
check-in, so that I could get some more testers.

I will see if I can fix it this evening.

/Niels

-- 
Get your firstname@lastname email for FREE at http://Nameplanet.com/?su

recent range checking additions...

[Wes H. <wjh...@uc...>]

Niels, somehow this isn't correct:

  % ../apps/snmpset localhost ucdavis.254.8.0 i 4
  ucdavis.254.8.0: Bad value notation (Type of object is not INTEGER) 

It shouldn't know what the type of that node is, since its in the
unregistered mib tree area...

Wouldn't it also be nice if you mentioned what type it was expecting,
rather than the type you specified?

  5:58pm homestyle [291]: ../apps/snmpset localhost sysContact.0 i 4
  sysContact.0: Bad value notation (Type of object is not INTEGER)                
Something like:

  5:58pm homestyle [291]: ../apps/snmpset localhost sysContact.0 i 4
  sysContact.0: Bad value notation (Type of object is OCTET STRING, not INTEGER)                
-- 
"Ninjas aren't dangerous.  They're more afraid of you than you are of them."

Re: libtool question

[Michael J. S. <msl...@is...>]

"Szaboky, George (George)" wrote:
> 
> Hi,
> 
> I pulled in ucd-snmp 4.2pre1 and compiled for Solaris. Went fine. I also
> have ported the previous distribution 4.1.2 to pSOS. When I ported 4.2pre1
> and compiled the snmplib and the the agent coded for pSOS I had all kinds of
> trouble building the libraries. Upon examination of the Makefiles I noticed
> that much has changed. It looks like a new script libtool is used to
> generate the libraries and they can be built for static linking or
> dynamically loaded libs. My question is how can I build libs that are
> statically linked, that is a bunch of object files that are put into a
> archive with something like "ar" without rewriting my own custom makefiles?
> Any hints?
> 
> Thanks
> 
> George


Hi, George.  You can achieve this by specifying

  configure --disable-shared *

where "*" represents the configure options
that you might already be using.

Run "make clean; make test" to verify that the build creates
working binaries.

Best Regards,
-Mike Slifcak, Internet Security Systems, Inc.

Re: libtool question

[Bert D. <dri...@pl...>]

On Thu, 16 Nov 2000, Szaboky, George (George) wrote:

>                         My question is how can I build libs that are
> statically linked, that is a bunch of object files that are put into a
> archive with something like "ar" without rewriting my own custom makefiles?

Have you tried ./configure --enable-static --disable-shared? That used
to work (I believe I have tried this recently, but I'm not sure).

Cheers,

				-- Bert

Bert Driehuis -- dri...@pl... -- +31-20-3116119
This message may have reached you in error. If so, please dispose
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prohibited by law. This message does not reflect the view of my
employer. It may or may not reflect my personal views.

Re: SNMPv3 Notifications

[Wes H. <wjh...@uc...>]

>>>>> On Thu, 16 Nov 2000 13:44:58 -0500, Randy Renwick <ra...@e-...> said:

Randy> Do the utilities snmptrapd and snmptrap support SNMPv3 notifications?

Yes. However...

Randy> I have been able to generate and receive v2c notifications with
Randy> these utilities but not v3 notifications.  I setup a user in
Randy> snmptrapd.conf using the createUser directive.  I am running
Randy> this test with both snmptrapd and snmptrap on the localhost.
Randy> Is there something else needed in snmpd.conf/snmptrapd.conf for
Randy> v3 notifications?

1) I'm not sure the v3 snmptrap&d code in the 4.1.2 release was correct (I
   don't think it is).

2) The trap code in 4.2.pre1 release should be.

3) The createUser line for inform notifications is as you'd expect.

4) For snmpv3 traps (unacknowledged), however, the user has to be
   created using the -e ENGINEID switch to createUser (which may not
   be documented).  The ENGINEID must be the engineid of the remote
   entity (the one sending the traps) instead of the local one (the
   one receiving the traps).  So, to send a v3 trap (as an example,
   I'm picking 0x001122 as a engineid):

   snmptrapd.conf:
     createUser -e 0x001122 user MD5 PASSPHRASE

   snmptrap -v 3 -u user -a MD5 -A PASSPHRASE -e 0x001122 localhost ...
   
-- 
Wes Hardaker
Please mail all replies to net...@li...

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[<sy...@tr...>]

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大変失礼致しました。

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◇-----------------------------------------------------------◇

libtool question

[Szaboky, G. (George) <sz...@lu...>]

Hi,

I pulled in ucd-snmp 4.2pre1 and compiled for Solaris. Went fine. I also
have ported the previous distribution 4.1.2 to pSOS. When I ported 4.2pre1
and compiled the snmplib and the the agent coded for pSOS I had all kinds of
trouble building the libraries. Upon examination of the Makefiles I noticed
that much has changed. It looks like a new script libtool is used to
generate the libraries and they can be built for static linking or
dynamically loaded libs. My question is how can I build libs that are
statically linked, that is a bunch of object files that are put into a
archive with something like "ar" without rewriting my own custom makefiles?
Any hints?

Thanks 

George

Re: Pb with the last perl/SNMP

[<ni...@ba...>]

On Thu, 16 Nov 2000 15:52:52 +0100 mo...@pc... wrote:
>SNMP.xs: In function `__translate_appl_type':
>SNMP.xs:359: `TYPE_UINTEGER' undeclared (first use in this function)

Oops, sorry about that. I had renamed the define by mistake. It should be back
to normal now.

/Niels

-- 
Get your firstname@lastname email for FREE at http://Nameplanet.com/?su

difficulty with mibs

[<Jas...@ms...>]

	hi all -- i'm attempting to set up net-snmp here..."most" of the
mibs work fine (i.e. snmpget and snmpwalk give appropriate results)...but
for some reason, some (seems like specifically those that require details
in snmpd.conf) like:

>> excerpt from snmpd example conf...

#  Make sure at least one sendmail, but less than or equal to 10 are
running.
proc sendmail 10 1

#  A snmpwalk of the process mib tree would look something like this:
#
# % snmpwalk -v 1 localhost public .1.3.6.1.4.1.2021.2
# enterprises.ucdavis.procTable.prEntry.prIndex.1 = 1
# enterprises.ucdavis.procTable.prEntry.prIndex.2 = 2
# enterprises.ucdavis.procTable.prEntry.prIndex.3 = 3

after running snmpwalk as listed above, we get nothing...using -D on the
daemon does verify that these modules are registered...but this part of
the tree remains empty...

can anyone shed some light on why this behavior is happening?  i did read
the FAQ and made sure i did all of the recommended suggestions...

thanks,

jason

SNMPv3 Notifications

[Randy R. <ra...@e-...>]

Do the utilities snmptrapd and snmptrap support SNMPv3 notifications?

I have been able to generate and receive v2c notifications with these
utilities but not v3 notifications.  I setup a user in snmptrapd.conf
using the createUser directive.  I am running this test with both
snmptrapd and snmptrap on the localhost.  Is there something else needed
in snmpd.conf/snmptrapd.conf for v3 notifications?

Randy Renwick
e-Manufacturing Networks, Inc.

Re: about snmp

[Wes H. <wjh...@uc...>]

>>>>> On Thu, 16 Nov 2000 15:50:25 +0800, "Jillfox" <ji...@26...> said:

Jillfox> I meet some trouble and need your help.  I have a manager( ip
Jillfox> 192.168.5.2 ) , there have a snmp agent on 192.168.3.3 What
Jillfox> oid can i set to let 192.168.3.3's agent to send traps to
Jillfox> 192.168.5.2?  can the trap target host be dynamic setting?

It depends on the agent.  Some agents support the creation of dynamic
trap receivers and some do not...

-- 
Wes Hardaker
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