On 24/09/2007, <[EMAIL PROTECTED]> 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
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