Fri Dec 18 09:43:35 CST 1998
ASNMP = ACE+SNMP++ Version 2.1
By Michael R. MacFaden mrm@acm.org, mrm@yagosys.com
What is ASNMP ? ==> ACE+SNMP! aka Another SNMP API HP's SNMP++ 2.5 freely available C++ SNMP class library has been adapted to the ACE 4.2 Framework.
What is Simple Network Management Protocol(SNMP)?
See the FAQ:
http://www.snmp.com/FAQs/snmp-faq-part1.txt
http://www.snmp.com/FAQs/snmp-faq-part2.txt
What was changed from HP version?
See src/ChangeLog file.
Is HP SNMP++ compatible with ASNMP?
It is neither source nor binary compatible. About 10% of the API has changed.
There have been API changes to make the interface more orthogonal
and to reduce implementation complexity such as consolidating constructors
with default formal values, and to remove some inconsistencies
with the HP interface as well as locking down valid() semantics, etc.
What platforms have the test programs been verified on? Solaris 2.4, 2.5.1 using SUN C++ 4.1,4.2 compiler. Linux/GCC fixes are now in as well.
Why use this version?
The SNMP++ version ships only for HP-UX and for Windows.
It is not very portable nor does it do a good job at checking
for out of memory exhaustion conditions (asn1.cpp). There is some great
code here. ACE needs an SNMP library to build NM type
communications applications. Hence ASNMP was born in my spare time.
How does ASNMP differ from SNMP?
Current version uses ACE OS Adaption layer. All memory
allocation is now consistent, uses ACE_NEW().
Standard ACE Debugging (ACE_TRACE) has been inserted.
ASNMP has less global namespace pollution by moving all non-class
functions into interface classes or made into static locals.
An agent inteface has been added (asnmp/sagent.h) so both agents and managers can use this class library. A trivial agent exists in ASNMP/agent/
X11 GUI support removed from this version since this is not the place to include GUI support in the new world of multi-threaded apps.
The async interface does not match the HP implementation.
How to build this library
Set ACE_ROOT and platform_macros.GNU per ../INSTALL file.
create libasnmp.a, libasnmp.so and then run the tests
Any Support for ASNMP?
As time permits from the mailing list.
Where to ask questions?
Please use ace-users@cs.wustl.edu mailing list or mrm@acm.org
NOTE: Please do not bother Eric Mellquist unless you are using
the original HP version of this library.
Where can I get the original HP SNMP++?
From ftp://rosegarden.external.hp.com:/pub/snmp++
What version of SNMP is fully supported? SNMP Version 1 (RFC 1155,1157, 1215)
What about SNMP Version 2c?
V2c is defined in RFC 1901 - 1908
These bits are added to v1 code in this library: GetBulk PDU, Counter64
These bits are missing Inform (RFC 1905)
RFC 1903 defined new datatypes using existing SMI via macros.
These should be coded as if they were SMI datatypes to encapsulate
their behavior. V2c hasn't been deployed
What about SNMP Version 3?
It is looking good for V3, but so far, we're just watching. http://www.ietf.org/html.charters/snmpv3-charter.html A C implemenation is now available from UC Davis.
What copyrights/legal requirements are required when using this code? See ./COPYRIGHT
Does this really work?
See tests/ directory for the current test reports (purify/purecov/...).
How does one Extend an SNMP Agent?
Extending an agent typically means updating the agent source or
using a dynamic link style API. RFC 2257 (AgentX) is the current design
for doing this in a standard way. This hasn't been well formalized yet
so extending an existing agent is still a vendor API thing.
The agent provided here is a template. A mib compiler and agent library typically provide better agent support. See the UC-Davis SNMP software for an example Agent that is portable and can report on many flavors of UNIX and Windows.
Any Future Plans?
The ASNMP library will be improved for performance and made to use
higher level design patterns. Hopefully it will be used as a
vehicle for grad students to learn something about network mgmt
code work a related cousin of general distributed programming.
Regards,
Michael R. MacFaden
Member of the Technical Staff
Cabletron Systems, Inc.
215 Moffet Park Drive
Sunnyvale, CA 94089
mrm@yagosys.com
http://www.yagosys.com
SNMP++ For UNIX Source Code and Examples:
Included within this package can be found the source code and examples for SNMP++. The following represents the directories which are included within the compressed tar file and their contents.
For more details on the API , please refer to the API specification.
This library is a complete implementation of SNMP++ and does not require other SNMP libraries to be present.
Required Tools:
readme.txt ( this file)
|
|
|------ src ( .cpp files and Makefile for building libraries )
|
|------ examples ( a variety of apps, .cpp and Makefile included )
|
|------ tests - unit test routines
src Directory Contents:
Makefile - make file for ACE/Solaris 2. build
target.cpp - Collection of attributes(address, timeout, etc) used
to define a command session
snmp.cpp - A logical session between NM app and agent
pdu.cpp - Pdu class source (vb list and API command)
wpdu.cpp - Adapter pattern based class between CMU and HP code
transaction.cpp - synchronous transaction clss
vb.cpp - Variable Binding class source (oid + value)
<< SMI datatypes used to get/set values in SNMPv1 agents >>
address.cpp - Address class source gauge.cpp - Gauge32 class source integer.cpp - Integer32 class source counter.cpp - Counter32 class source ctr64.cpp - Counter64 class source timetick.cpp - TimeTicks class source octet.cpp - Octet String class source oid.cpp - Oid class source asn1.cpp - ASN1 encoding and decoding code. CMU code.
examples Directory Contents:
Makefile - make file for building console apps get.cpp - source for SNMP get program next.cpp - source for SNMP get Next program set.cpp - source for SNMP set program trap.cpp - source for SNMP trap send program walk.cpp - source for SNMP walk program