adventnet trap

研究了adventnet  的API接口应用，走了很多弯路，为了给大家做指导，特此记录。

首先，adventnet分为高版本和低版本的API。以trap为例：高版本Using High-Level API，是在低版本的基础上在封装了一层，对于底版本我必须知道agent的upd端口号和地址，而高版本不需要知道，它会自动分发到agent端。

Using Low-Level API

public class Sendv2cTrap  
{

public static void main(String args[]) 
{
	if( args.length == 0)
	{
		System.out.println("Usage : java SnmpSendTrap hostname");
		System.exit(0);
	}
        
	// 需要发给哪个主机的IP地址
	String remoteHost = args[0];

	// Start SNMP API    
        SnmpAPI api = new SnmpAPI();
	api.setDebug(true);
	SnmpSession session = new SnmpSession(api); 

	// set remote Host
	UDPProtocolOptions option = new UDPProtocolOptions(hostname);
	SnmpPDU pdu = new SnmpPDU();
	pdu.setProtocolOptions(option);

	// 需要发给哪个主机的端口号
	option.setRemotePort(8001);

	//open the session
	try 
	{
            session.open();
        } 
	catch (SnmpException e ) 
	{
	    System.err.println("Error opening socket: "+e);
	}

	// Build SNMPv2c Trap PDU	
	pdu.setCommand(SnmpAPI.TRP2_REQ_MSG );
      
	//参数一
	SnmpVar var = null;
	SnmpOID oid = new SnmpOID(".1.3.6.1.2.1.1.3.0"); 
	try 
	{
		//create SnmpVar instance
		var = SnmpVar.createVariable(systemuptime, SnmpAPI.TIMETICKS);
	}
	catch(SnmpException e)
	{
		System.err.println("Cannot create variable: " + oid + " with value: " + systemuptime);
		return;
	}

	//create varbind    
	SnmpVarBind varbind = new SnmpVarBind(oid,var);

	// add variable binding
	pdu.addVariableBinding(varbind); 

	//参数二
	oid = new SnmpOID(".1.3.6.1.6.3.1.1.4.1.0");
	try 
	{
		//create SnmpVar instance
		var = SnmpVar.createVariable(trapoidvalue,SnmpAPI.OBJID); 
	}
	catch(SnmpException e)
	{
		System.err.println("Cannot create variable: " + oid + " with value: " + trapoidvalue);
		return;
	}

	//create varbind    
	SnmpVarBind varbind = new SnmpVarBind(oid,var); 

	// add variable binding
	pdu.addVariableBinding(varbind);

	// send PDU
        try 
	{ 
		session.send(pdu); 
	} 
	catch (SnmpException e) 
	{
	      System.err.println("Sending PDU"+e.getMessage());
	}

	System.exit(0);


}

以上是低版本，一般来说，是我知道对方的IP地址在做trap，这种不适合我的需要，我目前是直接分发出去。所以用高版本。

Using High-Level API

public class Sendv2Trap {

 private static final String OID = "1.3.6.1.2.33779.1";

	public static void main(String args[]) {

	// instantiate SNMP target bean 
	SnmpTarget target = new SnmpTarget();
         //本机主机地址
	target.settargetHost("hostname");

	//端口号
	target.setTargetPort(162);

	//Set the SNMP version. 
	target.setSnmpVersion(target.VERSION2C); 

	//值为public 
	target.setCommunity(community);
	
	//测试值
	String values[] = {"testing"};

	try
	{
//创建snmpoid
	SnmpOID snmpOID = new SnmpOID(OID);
//通过oid绑定参数和变量
         SnmpVar snmpVar = SnmpVar.createVariable("test Trap", SnmpAPI.STRING);
//发送trap
                this.eventAPI.snmpSendNotification(1000, snmpOID, new SnmpVar[] { snmpVar });	} 
	catch (Exception e) 
	{
        	System.err.println("Error Sending Trap: "+e.getMessage());
	}
	System.exit(0);
    }

最后就是接收端接收了。

public class SnmpTrapd implements TrapListener {
    public static void main(String args[]) {
        // instantiate SNMP Trap Receiver bean
        SnmpTrapReceiver trapreceiver = new SnmpTrapReceiver();
        // set the port in which the trap is received
        trapreceiver.setPort(162);
        // register the listener for trap events
        trapreceiver.addTrapListener(new SnmpTrapd());
        System.out.println("Waiting to receive traps .......");

    }

    @Override
    public void receivedTrap(TrapEvent trap) {
        System.out.println("Got a trap from: " + trap.getRemoteHost());
        // print PDU details
        System.out.println(((SnmpTrapReceiver) trap.getSource()).getMibOperations().toString(trap.getTrapPDU()));
        if (trap.getTrapPDU().getCommand() == SnmpAPI.TRP_REQ_MSG) {
            com.adventnet.snmp.mibs.MibTrap trapDefn = trap.getTrapDefinition();
            if (trapDefn != null) // print name and description
                System.out.println("Trap Name: " + trapDefn.getName() + "\nDescr: " + trapDefn.getDescription());
        }
    }
}