[AGENT++] SNMP++.NET

[Marek Malowidzki]

> > Hi Marek,
> >
> > I would like, of course, take a look at your implementation. Do you plan
> > to place the code on your web site once you have released it?
>
> Yes, of course, it will be made public. The current implementation is
> available at
>
> http://republika.pl/maom_onet/snmpppdotnet/

Well, it looks like you are busy with SNMP4J. Of course, I do not try to
hurry you but just would like to add that I have compiled the component
against 3.2.10 and was able to get rid of the ugly '(Snmp*) 0xffffffff'
supplied as the first argument for v3MP (which would probably caused crash
on the reception of INFORM, as I guess).

There was also some more effort and small improvements:
- ordered signed/unsigned mess and now all Length/Count's are UInt32
- added helper properties for "composed of" objects (e.g., the Oids property
that returns sub-ids for a given OBJECT IDENTIFIER)
- added iterators for "composed of" objects (Oid, Pdu, OctetStr, etc.),
which allows foreach() statement to be used in a convenient way
- slightly improved the manager demo program which now can start multiple
treads for testing purposes.

The sources at the above location have been updated. I believe that there is
no SNMPv3 implementation for .NET (at least, not an open-source one, or at
least, I am not aware of any), so this could be an interesting contribution.
Of course, there is still some work left, e.g. the documentation and some
missing stuff (like IPX addresses).

I would also like to pay your attention again to Pdu::set_notify_id() as it
still uses 'const Oid id' instead of 'const Oid &id' - not a big deal but
anyway worth being corrected. (I am not sure if it was legal for a C++
compiler to perform some optimization since the constructors could have some
side effects, e.g. on global variables).

Marek

following files are present:
>
> MConversion.cpp
> MConversion.h
> MTypes.h
> MLock.h
> auto_array_ptr.h
>
> These are various helper files, mainly for memory management and types
> conversion.
>
> MSnmpComp.cpp
>
> This is the main component code. Please have a look at the info in the
> header (just after the copyrights). In this note, I am trying to explain
the
> most important decisions concerning the current implementation.
>
> MSnmpCompExample.cs
> MSnmpManager.cs
>
> The first file is a simple example that shows the "look & feel" of the
> implementation. The "manager" file is a command line utility that allows
to
> issue get/next/bulk/walk operations. This is, in fact, rewritten snmpSet
> example from your distribution.
>
> The component has been checked and it seems to work - we are able to use
all
> kinds of operations, including SNMPv3. However, I admit that the
> implementation lacks thorough tests against every piece of code. I do not
> expect anyone to do beta testing - I would just like to discuss the design
> (the API), and we will perform the tests when it becomes stable. That
said,
> I think that most of the code is just thin wrapping around SNMP++ and our
> results are encouraging - we have performed some stress tests (with the -n
> option set to a large value and locally running agent that allows to
> perform, on my slow PC, about 100 SNMP calls/second) and we did not notice
> any memory problems; from time to time, the memory usage descreases, as
the
> system monitor shows. Looks like garbage collecting works sufficiently
well
> also for the unmanaged memory (that is, the unmanaged memory is reclaimed
> when finalizers are invoked on managed objects being collected).
>
> Best regards,
>
> Marek
>
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