> From: daily study [mailto:study.dail...@gmail.com]
> Sent: Saturday, March 20, 2010 9:12 AM
> > My traffic model as below:
> > traffic process1<--(private protocol)-->agent process<-(snmp
> protocol)->manager
> > |
> > traffic process2<--(private protocol)--
> I study the master.c file. I find that the routine
> agentx_master_handler() process
> the SNMP message from MANAGER, then after change to private
> protocol and dipatch
> the private get/getnext/set message to subagent which
> should be my traffic process
> and the routine agentx_got_response() process the messges from
> subagent
> the routine agentx_master_handler() process.
> Is it right? In traffic process, when receive a getnext private
> command message from agent,
> I should get the the next oid and its value and send this to agent,
> i.e. my real data in traffic process should be built in a list of
> lexicographic order.
> Is this right?
Mostly. However, there's a hitch - your diagram depicts a private
protocol between "agent process" and the traffic processes, but "agent process"
becomes "master agent<--(AgentX)-->subagent" by your description. This is
significant because the subagent can run on either the traffic hosts or the
master agent's host, if your private protocol is network-capable. This is also
significant because the subagent will not run in the same process as the
traffic, unless you want to do the socket manipulation and polling yourself..?
Check here:
http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_MIB_Module
http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_Subagent
...for more details.
HTH,
Mike
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