Handling set request...

[Frank Fock]

Nick,

Please find my comments inline:

Nick Woods wrote:

> What I really want to do now is provide a similar set of functionality
> to handle SNMP set requests.  I noticed a set of virtual functions in
> MibLeaf that seem to deal with SNMP set requests.  They are as follows:
>

Please make sure that you always call the corresponding superclass
method if you override one of the below methods.

>
>   virtual int           commit_set_request(Request*, int);

Override this method to implement the actions you want to
take if the object is SET, but do not forget to call the super class
commit_set_request in order to backup the undo value and set the
cache value of the object correctly.

>
>   virtual int           prepare_set_request(Request*, int&);

This can be overriden to implement sanity checks on the supplied value.

>
>   virtual int           undo_set_request(Request*, int&);

Override this when you need to take any actions when a commit is
undone.

>
>   virtual void          cleanup_set_request(Request*, int&);

Is called to free any resources allocated during prepare and commit
phase.

>
>   virtual boolean       value_ok(const Vbx&)    { return TRUE; }

Can be overriden to check supplied values for WRONG_VALUE
errors. (Can also be done in prepare_set_request)

>
>
> I was hoping that someone could tell me which functions I would need to
> override and to provide a correct SNMP set operation that would handle
> the request and pass the changed data to a callback function of mine.
> In searching through the agent++ code I noticed the atm_mib example
> overriding the prepare_set_request function and doing something with the
> value.  Any explanation of exactly what the following code snippet is
> doing and if there is anything else that I need to do to get this all
> working would be much apprecitated.
>

Did you read the AGENT++v2.x documentation already? There is an
example for setting an object. You can find it at http://www.agentpp.com

>
> -----------------
> int atmInterfaceMyNeighborIfName::prepare_set_request(Request* req, int&
> ind)
> {
>         int status;

Check if superclass has already detected an error.

>
>         if ((status = SimMibLeaf::prepare_set_request(req, ind)) !=
>             SNMP_ERROR_SUCCESS) return status;

>

Check whether supplied OCTET STRING has a length between
0 and 255 bytes.

>
>         Vb vb(req->get_value(ind));
>         OctetStr v;
>         vb.get_value(v);
>         if (!(((v.len() >= 0) && (v.len() <= 255))))
>                  return SNMP_ERROR_WRONG_LENGTH;
>         return SNMP_ERROR_SUCCESS;
> }

Best regards,
Frank