Re: Agent Extension

On 24/09/2007, <kujtim.hyseni@fshmn.uni-pr.edu> wrote:
> Hi,
>
> how to extent the agent to support new user defined protocol, other than
> 1, 2c and 3.

There are two possibilities.
If the new protocol is similar to SNMP, then you need to:

- provide a routine to take an incoming request, and parse
it into a 'netsnmp_pdu' structure
- provide a routine to process this netsnmp_pdu request
structure, and construct a response PDU
- provide a routine to take a netsnmp_pdu structure, and
encode it ready for sending over the network

You can then use snmp_add_full() to register these three
routines with the main agent framework.
See agent/mibgroup/agentx/{subagent.c,protocol.c} for an
example of this approach.


Alternatively, if your protocol doesn't match SNMP sufficiently
to fit into the netsnmp_pdu structure, then you can use the
register_{read,write}fd() routines to read/send arbitrary data
on specified sockets. See snmplib/fd_event_manager.c
for details.
Unfortunately, I don't believe that there's an example of
this approach in the Net-SNMP code base.

Dave

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
Net-snmp-coders mailing list
Net-snmp-coders@lists.sourceforge.net
https://lists.sourceforge.net/lists/...et-snmp-coders