import java.lang.*;
import com.adventnet.snmp.snmp2.*;
import com.adventnet.snmp.snmp2.usm.USMUserEntry;
import com.adventnet.snmp.snmp2.usm.USMUtils;

public class TcpConMgr {
    public static void main(String args[]) {

        String remoteHost = "130.89.144.44";
        String OID = ".1.3.6.1.2.1.1.9";
        if (args.length == 2) {
            remoteHost = args[0];
            OID = args[1];
        }
        int oidLength = OID.length();
        SnmpAPI api;
        api = new SnmpAPI();
        api.start();
        api.setDebug(false);
        String imm = "imm";
        SnmpEngineEntry snmpEntry = new SnmpEngineEntry(remoteHost, 2161);
        byte[] engineID = snmpEntry.getEngineID();
        byte[] userName = imm.getBytes();
        USMUserEntry usmEntry = new USMUserEntry(userName, engineID);
        usmEntry.setSecurityLevel(Snmp3Message.AUTH_PRIV);
        byte[] authPassword = "s1mpl31snt1t".getBytes();
        usmEntry.setAuthPassword(authPassword);
        usmEntry.setAuthProtocol(USMUserEntry.SHA_AUTH);
        byte[] authKey = USMUtils.password_to_key(usmEntry.getAuthProtocol(), authPassword, authPassword.length, engineID);
        usmEntry.setAuthKey(authKey);
        SnmpSession session = new SnmpSession(api);
        session.setRemotePort(2161);
        session.setCommunity(imm);
        session.setUserName(imm.getBytes());
        try {
            session.open();
        } catch (SnmpException e) {
            System.err.println("Error opening socket: " + e);
        }
        session.setPeername(remoteHost);
        SnmpPDU pdu = new SnmpPDU();
        pdu.setCommand(api.GETNEXT_REQ_MSG);
        pdu.addNull(new SnmpOID(OID));
        String checkId = OID;
        do {
            try {
                pdu.setCommand(SnmpAPI.GETNEXT_REQ_MSG);
                pdu = session.syncSend(pdu);
            } catch (SnmpException e) {
                System.err.println("Error sending SNMP request: " + e);
            }
            SnmpVarBind snmpVar = pdu.getVariableBinding(0);
            String objId = snmpVar.getObjectID().toString();
            checkId = objId.substring(0, oidLength);
            objId = objId.substring(oidLength + 1, objId.length());
            if (OID.equals(checkId)) {
                System.out.println(pdu.printVarBinds());
            } else
                break;
        } while (OID.equals(checkId));
        session.close();
        api.close();

    }

}