Hi,David ,I made it with your suggestion. in excute phase: (both the agent and the manager were on ubuntu-10.10)
in the agent side, I wrote agent's command function in the MODE_SET_COMMIT
module,
it get the command string from the set-request package,and system it
in the manager side ,I made a set-request package, send it.
and the agent excute it , it's wonderful !
By now ,I can send several commands and excute them on the agent via
net-snmpsuch ,as "touch ","cal" ,etc.
but when I send "shutdown -h now" or "gedit &", it didn't work.
Then ,what's the reason ? because of the authority of the snmp user or X server
? How to solve this?
Best Regards
wade
发件人： David A
发送时间： 2010-11-20 18:00:42
收件人： 徐滕
抄送： net-snmp-users
主题： Re: 回复： Help using net-snmp
Hi good to see you are progressing.
Q1: you can shorten the timeout. That will help move stuff along. Or instead of
looking for agents, you can maybe incorporate a protocol like bonjour or mdns?
Google those and see. I forgot details on them
Q2: did you create an init_<module> and in there call the init function created
by mib2c ? You also might want to make that one a set request, instead of get.
Good luck
David
On Nov 20, 2010 1:44 AM, "徐滕" <xut...@huaihuacity.com> wrote:
> Thanks David, and I still have to bother you with two questions.
>
> By now ,my practice is :
>
> I wrote my own mib which has two oids ,a vendorId (.1.3.6.1.4.1.8888.1, a
> string type ,read-only ,for detecting device) ,a commandId
> ((.1.3.6.1.4.1.8888.2, a string type, read-only ,for execute command on the
> agent) , add this mib to the agent
>
> question 1 : in detecting phase:
> I send the get-request for oid vendorID to the lan subnet , once anyone
> return the vendorId I wanted , the manager recognise the responser . In my
> test case, polling 60 IPs cost 6 minutes, it's a little slow, is anyother
> more effective way to detecte devices I wanted?
>
> question 2: in execute phase
> I want the agent to execute a command such as shutdown when the manager send
> a get-request for commandId, so ,I used the mib2c to generate .h and .c from
> the mib I defined myself , in the get-request-handler for commandId, I added
> a function system("shutdown -h now") , then compile these files to a dynamic
> library mylib.so , loaded it in the snmpd.conf on the agent ,restart snmpd
> service . but it doesn't work ,why ? How should I do ?
>
> Thanks
>
> Best Regards
>
> wade
>
> ------------------ 原始邮件 ------------------
> 发件人: "David A"<daaf...@gmail.com>;
> 发送时间: 2010年11月20日(星期六) 凌晨0:43
> 收件人: "徐滕"<xut...@huaihuacity.com>;
> 抄送: "net-snmp-users"<net-snmp-users@lists.sourceforge.net>;
> 主题: Re: Help using net-snmp
>
>
>
> Yes you would have to send requests to a range of IP addresses and see who
> answers back. Or maybe you can use some bonjour like protocol.
>
> The manager can send requests to an agent that can trigger a command to be
> executed yes.
> On Nov 18, 2010 6:48 PM, "徐滕" <xut...@huaihuacity.com> wrote:
>> Hi,all:
>>
>> I'm a fresh man to snmp, and now participating a project which has a manger
>> on the console server,and a agent on several
>>
>> terminals such as pc or tc via lan . I cannot get my head arount how the
>> manger detect the agent via lan ,should it brodcast a get-request to the lan
>> ?
>>
>> and next question is ,could the manger send data to the agent or excute a
>> remote command on the agent via net-snmp ?
>>
>> Could anyone help me?
>>
>> Regards!
>>
>> wade
>>
>> 2010-11-19
<<FoxmailIcon2: xuteng@huaihuacity.com.jpg>>
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