SNMP Get in ASL

Hi Alicia,

you should have seen that the method signature is :

    get target oid timeout retries policy format

only the first 2 parameters are mandatory. The second one is obvious (ex : ".1.3.6.1.2.1.1.5.0"), the first one is a struct :

struct target {
        /// The target's IP address or hostname
        string address;
        /// The target's UDP port number
        unsigned short port;
        /// The target's SNMP version
        version_t version;
        /// The target's community string (for SNMPv1 / SNMPv2c)
        string community;
        /// The target's username (for SNMPv3)
        string username;
        /// The user's Authentication Protocol (for SNMPv3)
        string authProtocol;
        /// The user's Privacy Protocol (for SNMPv3)
        string privProtocol;
        /// The user's Authentication Password (for SNMPv3)
        string authPassword;
        /// The user's Privacy Password (for SNMPv3)
        string privPassword;
        /// The target's VACM Context Name (for SNMPv3)
        string contextName;
};

the return value is an array with:

0 : OID

1 : type

2 : value

if I remember well.

HTH,

--Fred

Is it possible to run this ACT_SNMP on a Smarts OI server. Because I am getting the following error while trying to get snmpActGet from an OI sever.

ASL-W-ERROR_RULE_SOURCE-While executing rule set
    '/opt/InCharge7/SAM/smarts/local/rules/icoi-trapd/xenpak.asl'
ASL-ERROR_ACTION-While executing action at:
ASL-CALL_STACK_RULE-   RuleName: START, Line: 134
ASL-ERROR_INVOKE-While attempting to invoke operation 'snmpActGet' of object
    'MR_Object::ICF-TopologyManager'
SVIF-EREMOTE-CI-E-EGENERIC-At
  .
    /work/bluecurrent/FOUNDATION-7.2.0.X/28/smarts/repos/mr/classdef.c:6825
  .     snmpActGet: Specified operation not found in class
  .  MR-OPERATION_NOT_FOUND-Specified operation not found in class

I am using the following command to get the objects.

topoObj = object("ICF-TopologyManager");

varbind = topoObj->snmpActGet(snmpAct, agentObj,oids[oid]);

Is this error occurring because of the difference in the instances in ICF_TopologyManager in AM domain and in OI domain?

regards

Arun

Hi ArunDeva,

my example is based on :

ACT_SNMP

object, as requested by Alicia, not :

ICF_TopologyManager

And yes, the ICF_TopologyManager class in OI is different than the one in AM. Do a :

dmctl -s getop

and you will see the class' methods.

So in your case, you should be able to use the ACT_SNMP object in order to do SNMP requests from OI.

--Fred

== Monitor your Smarts environment using APG ReportPack for Smarts health ==

Frederic Meunier

Solutions Watch4Net Inc

APG & Smarts InCharge integration

http://www.watch4net.com

Thanks Fred.

I tried to get the value of the OID ".1.3.6.1.2.1.1.3.0" using snmpActGet function.

but it is not returning any value and is printing the value that I am giving in the varbind definition. Not the value of the OID.

varbind = list(oid, 0, "");
varbind = topo_manager->snmpActGetNext(snmpAct, agentObj, oid)?IGNORE;

print("The varbind value is");

print(varbind[2]);

What can be went wrong?

Could somebody help here please?

I tried without Next also. But still it is not getting the value of the OID that I need.

varbind = topo_manager->snmpActGet(snmpAct, agentObj, oid)?IGNORE;

agentObj = '172.25.22.157';
default DEBUG=TRUE;
default sysObjName = "";
oids = table();

uptimeoid = ".1.3.6.1.2.1.1.3.0";

START{
}do{
        snmpAct = create("ACT_SNMP", "Uptime-ACT-SNMP");

topo_manager = object(getInstances("ICF_TopologyManager")[0]);
timeout = topo_manager->defaultTimeout;
retries = topo_manager->defaultRetries;
snmpAct->stop()?IGNORE;
snmpAct->start(timeout, retries)?IGNORE;

     if (DEBUG) {    print("System Group for ".sysObjName.topo_manager);}

varbind = list(uptimeoid, 0, -1);
varbind = topo_manager->snmpActGet(snmpAct, agentObj, uptimeoid)?IGNORE;

print("The varbind value is");
print(numeric(varbind[2]));
stop();
}

When I run this asl, I am getting the following result. But I need the value which is returned for the oid.

System Group for MR_Object::ICF-TopologyManager
The varbind value is
-1

I got it to work:

START {
    .. eol
} do {
    print("Starting script...");
   
    snmp_get = object("ACT_SNMP", "SNMP_Get");
    if (snmp_get->isNull()) {
        snmp_get = create("ACT_SNMP", "SNMP_Get");
    }
   
    if ( ! snmp_get->started ) {
    snmp_get->start(3000, 1);
  }
    snmp_get->trace = TRUE;
   
    snmp_target = list(
        ip_address,                // IP Address of the Device
        161,                                        // SNMP Port
        "V2C",                                    // SNMP Version "V1" or "V2C"
        "community",                             // Read Community String
        "",                                            // Target Username (V3)
        "",                                            // Authentication Protocol (V3)
        "",                                            // Privacy Protocol (V3)
        "",                                            // Authentication Password (V3)
        "",                                            // Privacy Password (V3)
        ""                                            // VACM Context Name (V3)
    );
   
    result  = list(".1.3.6.1.2.1.1.3.0", 0, -1);
    result  = snmp_get->get(
        snmp_target,
        ".1.3.6.1.2.1.1.3.0",        //snmpOID
        3000,                                        //snmpTimeout
        1,                                            //snmpRetries
        "unknown",                            //snmpPolicy
        "intOctetStr"                        //snmpPolicy
    );
    print("Result: " . result);
    if (result[2] != -1) {
        value = result[2];
        print(value);
    }
}

Thanks a lot Alicia. It really worked.

Regards

Arun

How do we perform "Error Handling" in this piece of code?

result = snmp_get->get(

          snmp_target,

          ".1.3.6.1.2.1.1.3.0",

          3000,

          1,

          "unknown"

         "intOctetStr

              );   ----------------------------------------------->

print("result: ".result);

if (result[2] != -1 )      {

     value = result[2] ;

     print(value);

}

I can understand that putting ?LOG at teh arrow section will log the error in the log file.

But if there is any the snmp_get is returning a NULL value, it is logging but it is not proceeding to the print statement. Why? and how can we handle that?

Thanks

Arun

any help here?

Hi Arun,

two ways to handle this :

(1) force a default value to result, before the call to the snmp function :

result = "";

and test for this to be sure you did receive a value from the function

(2) use the defined function :

if ( defined(result) ) {

...

}

HTH,

--Fred

== APG5 ReportPack4Event for Smarts can report on millions of notifications in seconds ==

Frederic Meunier

Solutions Watch4Net Inc

APG & Smarts InCharge integration

http://www.watch4net.com