Re: Own module does not get initialized

On 7/27/2011 6:26 PM, Juri Glaß wrote:
> Hi
>
>> To make sure that your module has been compiled use the following command
>> net-snmp-config --snmpd-module-list
> My module is in the list returned by this command.
>
>> Normally the source compiled snmpd would be available at
>> /usr/local/snmpd if you have not provided the prefix directory. Please
>> check whether you are running the default snmpd instead of the newly
>> compiled one.
> I definitely use the compiled version.
>
> My compiled version is in /usr/local/sbin and "which snmpd" points to this location.
> To be absolutely sure I moved my default snmpd (which was in /usr/sbin).
>
> Are there any configuration options available to explicitly load a module?
> So that I have some errors if this fails.

You can compile your mib implementation as a subagent and run it as a 
separate process. Check whether that works.

To compile as subagent:

*/net-snmp-config  --compile-subagent <filename.c> /*

Add an entry in your snmpd.conf

*/master agentx/*

Now start the snmpd as well as the subagent and then try to query the OID.

You can also compile your module as a dynamically loadable module and 
get this functionality working.

http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_Subagent
http://www.net-snmp.org/wiki/index.php/TUT:Writing_a_Dynamically_Loadable_Object

- nisha
>
> Juri
>
>
>
> Am 27.07.2011 um 13:51 schrieb Nisha P K:
>
>> On 7/27/2011 3:35 PM, Juri Glaß wrote:
>>> Hi
>>>
>>> I want to write a SNMP module, but I somehow can't get it initialized and snmpwalk/snmpget returns "No Such Object available on this agent at this OID" respectively.
>>>
>>> The steps that I've done till now:
>>>
>>> * I wrote my own MIB file (some scalars, below enterprises and our enterprise id)
>>> * I checked if this MIB file is correct using snmptranslate
>>> * I generated c skeleton code with mib2c and implemented it
>>> * I got the net-snmp sources, configured them with my MIB file, make, make install
>>> * It gets compiled and installed
>>> * I added my MIB file to /usr/share/snmp/mibs
>>> * I added a "mibs + :<mymib>" statement to snmp.conf (apparently in snmpd.conf the mibs statement is not recognized)
>> ./configure --with-mib-modules=<module-name>
>> make
>> make install
>>
>> <module-name>  is the name of the file generated using mib2c excluding
>> the .c extension.
>>
>> To make sure that your module has been compiled use the following command
>> net-snmp-config --snmpd-module-list
>>
>> This should provide the list of all modules that has been compiled along
>> with this snmpd.
>>> Then I start my compiled snmpd with "snmpd -f -Lo -D" and I can see that my MIB file is loaded.
>>>
>>> But if I register the debug token (snmpd -f -Lo -D<mymodule>), that was generated by mib2c, there is no ouput that my module gets initialized.
>> Normally the source compiled snmpd would be available at
>> /usr/local/snmpd if you have not provided the prefix directory. Please
>> check whether you are running the default snmpd instead of the newly
>> compiled one.
>>
>>> I even removed the if statement before the call to init_<mymodule>   in agent/mibgroup/mib_module_inits.h but this didn't work either.
>>>
>>> How can I get my module initialized?
>>>
>>> Any help would be appreciated!
>>>
>>> Juri
>>>
>>>
>>>
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>>
>>
>
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