/*******************************************************************************
* This file is part of OpenNMS(R).
*
* Copyright (C) 2011 The OpenNMS Group, Inc.
* OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
*
* OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
*
* OpenNMS(R) is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* OpenNMS(R) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenNMS(R). If not, see:
* http://www.gnu.org/licenses/
*
* For more information contact:
* OpenNMS(R) Licensing <license@opennms.org>
* http://www.opennms.org/
* http://www.opennms.com/
*******************************************************************************/
package org.opennms.netmgt.snmp.mock;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map.Entry;
import java.util.NoSuchElementException;
import java.util.Properties;
import java.util.SortedMap;
import java.util.TreeMap;
import org.opennms.netmgt.snmp.SnmpInstId;
import org.opennms.netmgt.snmp.SnmpObjId;
import org.opennms.netmgt.snmp.SnmpValue;
public class TestAgent {
private static class Redirect {
SnmpObjId m_targetObjId;
public Redirect(SnmpObjId targetObjId) {
m_targetObjId = targetObjId;
}
public SnmpObjId getTargetObjId() {
return m_targetObjId;
}
}
private SortedMap<SnmpObjId, Object> m_agentData = new TreeMap<SnmpObjId, Object>();
private boolean isV1 = true;
private int m_maxResponseSize = 100; // this is kind of close to reality
public SnmpValue getValueFor(SnmpObjId id) {
Object result = m_agentData.get(id);
if (result == null) {
generateException(id);
} else if (result instanceof RuntimeException) {
throw (RuntimeException) result;
}
return (SnmpValue) result;
}
private void generateException(SnmpObjId id) {
if (m_agentData.isEmpty()) {
throw new AgentNoSuchObjectException();
}
SnmpObjId firstOid = m_agentData.firstKey();
SnmpObjId lastOid = m_agentData.lastKey();
if (id.compareTo(firstOid) < 0 || id.compareTo(lastOid) > 0)
throw new AgentNoSuchObjectException();
throw new AgentNoSuchInstanceException();
}
public void setAgentData(Properties mibData) {
MockSnmpValueFactory factory = new MockSnmpValueFactory();
m_agentData = new TreeMap<SnmpObjId, Object>();
for (Entry<Object, Object> entry : mibData.entrySet()) {
SnmpObjId objId = SnmpObjId.get(entry.getKey().toString());
setAgentValue(objId, factory.parseMibValue(entry.getValue().toString()));
}
}
public SnmpObjId getFollowingObjId(SnmpObjId id) {
try {
SnmpObjId nextObjId = m_agentData.tailMap(SnmpObjId.get(id, SnmpInstId.INST_ZERO)).firstKey();
Object value = m_agentData.get(nextObjId);
if (value instanceof Redirect) {
Redirect redirect = (Redirect) value;
return redirect.getTargetObjId();
}
return nextObjId;
} catch (NoSuchElementException e) {
throw new AgentEndOfMibException();
}
}
public void loadSnmpTestData(Class<?> clazz, String name) throws IOException {
InputStream dataStream = clazz.getResourceAsStream(name);
Properties mibData = new Properties();
mibData.load(dataStream);
dataStream.close();
setAgentData(mibData);
}
public void setAgentValue(SnmpObjId objId, SnmpValue value) {
m_agentData.put(objId, value);
}
/**
* This simulates send a packet and waiting for a response
* @param pdu
* @return
*/
public ResponsePdu send(RequestPdu pdu) {
return pdu.send(this);
}
public void setBehaviorToV1() {
isV1 = true;
}
public void setBehaviorToV2() {
isV1 = false;
}
SnmpValue handleNoSuchObject(SnmpObjId reqObjId, int errIndex) {
if (isVersion1()) {
throw new AgentNoSuchNameException(errIndex);
}
return MockSnmpValue.NO_SUCH_OBJECT;
}
SnmpValue handleNoSuchInstance(SnmpObjId reqObjId, int errIndex) {
if (isVersion1()) {
throw new AgentNoSuchNameException(errIndex);
}
return MockSnmpValue.NO_SUCH_INSTANCE;
}
SnmpValue getVarBindValue(SnmpObjId objId, int errIndex) {
try {
return getValueFor(objId);
} catch (AgentNoSuchInstanceException e) {
return handleNoSuchInstance(objId, errIndex);
} catch (AgentNoSuchObjectException e) {
return handleNoSuchObject(objId, errIndex);
} catch (Exception e) {
throw new AgentGenErrException(errIndex);
}
}
TestVarBind getNextResponseVarBind(SnmpObjId lastOid, int errIndex) {
try {
SnmpObjId objId = getFollowingObjId(lastOid);
SnmpValue value = getVarBindValue(objId, errIndex);
return new TestVarBind(objId, value);
} catch (AgentEndOfMibException e) {
return handleEndOfMib(lastOid, errIndex);
}
}
private TestVarBind handleEndOfMib(SnmpObjId lastOid, int errIndex) {
if (isVersion1()) {
throw new AgentNoSuchNameException(errIndex);
}
return new TestVarBind(lastOid, MockSnmpValue.END_OF_MIB);
}
TestVarBind getResponseVarBind(SnmpObjId objId, int errIndex) {
SnmpValue value = getVarBindValue(objId, errIndex);
return new TestVarBind(objId, value);
}
public boolean isVersion1() {
return isV1;
}
public void setMaxResponseSize(int maxResponseSize) {
m_maxResponseSize = maxResponseSize;
}
public int getMaxResponseSize() {
return m_maxResponseSize;
}
public void introduceSequenceError(SnmpObjId objId, SnmpObjId followingObjId) {
Redirect redirect = new Redirect(followingObjId);
m_agentData.put(SnmpObjId.get(objId, "0"), redirect);
}
public RuntimeException introduceGenErr(SnmpObjId objId) {
RuntimeException exception = new RuntimeException("Error occurred retrieving "+objId);
m_agentData.put(objId, exception);
return exception;
}
}