/*
* @(#)file SnmpSubNextRequestHandler.java
* @(#)author Sun Microsystems, Inc.
* @(#)version 4.25
* @(#)date 05/08/26
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*/
package com.sun.jmx.snmp.daemon;
// java imports
//
import java.util.Vector;
// jmx imports
//
import com.sun.jmx.snmp.SnmpEngine;
import com.sun.jmx.snmp.SnmpPdu;
import com.sun.jmx.snmp.SnmpValue;
import com.sun.jmx.snmp.SnmpVarBind;
import com.sun.jmx.snmp.SnmpVarBindList;
import com.sun.jmx.snmp.SnmpOid;
import com.sun.jmx.snmp.SnmpDefinitions;
import com.sun.jmx.snmp.SnmpStatusException;
// SNMP Runtime import
//
import com.sun.jmx.snmp.agent.SnmpMibAgent;
import com.sun.jmx.snmp.agent.SnmpMibRequest;
import com.sun.jmx.snmp.daemon.SnmpAdaptorServer;
import com.sun.jmx.snmp.internal.SnmpIncomingRequest;
/* NPCTE fix for bugId 4492741, esc 0 */
import com.sun.jmx.snmp.ThreadContext;
/* end of NPCTE fix for bugId 4492741 */
class SnmpSubNextRequestHandler extends SnmpSubRequestHandler {
private SnmpAdaptorServer server = null;
/**
* The constuctor initialize the subrequest with the whole varbind
* list contained in the original request.
*/
protected SnmpSubNextRequestHandler(SnmpAdaptorServer server,
SnmpMibAgent agent,
SnmpPdu req) {
super(agent,req);
init(req, server);
}
protected SnmpSubNextRequestHandler(SnmpEngine engine,
SnmpAdaptorServer server,
SnmpIncomingRequest incRequest,
SnmpMibAgent agent,
SnmpPdu req) {
super(engine, incRequest, agent, req);
init(req, server);
if(isDebugOn())
debug("SnmpSubNextRequestHandler", "Constructor :" + this);
}
private void init(SnmpPdu req, SnmpAdaptorServer server) {
this.server = server;
// The translation table is easy in this case ...
//
final int max= translation.length;
final SnmpVarBind[] list= req.varBindList;
final NonSyncVector nonSyncVarBind = ((NonSyncVector)varBind);
for(int i=0; i < max; i++) {
translation[i]= i;
// we need to allocate a new SnmpVarBind. Otherwise the first
// sub request will modify the list...
//
final SnmpVarBind newVarBind =
new SnmpVarBind(list[i].oid, list[i].value);
nonSyncVarBind.addNonSyncElement(newVarBind);
}
}
public void run() {
try {
/* NPCTE fix for bugId 4492741, esc 0, 16-August-2001 */
final ThreadContext oldContext =
ThreadContext.push("SnmpUserData",data);
try {
if (isTraceOn()) {
trace("run", "[" + Thread.currentThread() +
"]:getNext operation on " + agent.getMibName());
}
// Always call with V2. So the merge of the responses will
// be easier.
//
agent.getNext(createMibRequest(varBind, snmpVersionTwo, data));
} finally {
ThreadContext.restore(oldContext);
}
/* end of NPCTE fix for bugId 4492741 */
} catch(SnmpStatusException x) {
errorStatus = x.getStatus() ;
errorIndex= x.getErrorIndex();
if (isDebugOn()) {
debug("run", "[" + Thread.currentThread() +
"]:an Snmp error occured during the operation");
debug("run",x);
}
}
catch(Exception x) {
errorStatus = SnmpDefinitions.snmpRspGenErr ;
if (isTraceOn()) {
trace("run", "[" + Thread.currentThread() +
"]:a generic error occured during the operation");
}
if (isDebugOn()) {
debug("run","Error is: " + x);
debug("run",x);
}
}
if (isTraceOn()) {
trace("run", "[" + Thread.currentThread() +
"]:operation completed");
}
}
/**
* The method updates the varbind list of the subrequest.
*/
protected void updateRequest(SnmpVarBind var, int pos) {
if(isDebugOn())
debug("updateRequest", "Copy :" + var);
int size= varBind.size();
translation[size]= pos;
final SnmpVarBind newVarBind =
new SnmpVarBind(var.oid, var.value);
if(isDebugOn())
debug("updateRequest", "Copied :" + newVarBind);
varBind.addElement(newVarBind);
}
/**
* The method updates a given var bind list with the result of a
* previsouly invoked operation.
* Prior to calling the method, one must make sure that the operation was
* successful. As such the method getErrorIndex or getErrorStatus should be
* called.
*/
protected void updateResult(SnmpVarBind[] result) {
final int max=varBind.size();
for(int i= 0; i< max ; i++) {
// May be we should control the position ...
//
final int index= translation[i];
final SnmpVarBind elmt=
(SnmpVarBind)((NonSyncVector)varBind).elementAtNonSync(i);
final SnmpVarBind vb= result[index];
if (vb == null) {
result[index]= elmt;
/* NPCTE fix for bugid 4381195 esc 0. <J.C.> < 17-Oct-2000> */
// if ((elmt != null) && (elmt.value == null) &&
// (version == snmpVersionTwo))
// elmt.value = SnmpVarBind.endOfMibView;
/* end of NPCTE fix for bugid 4381195 */
continue;
}
final SnmpValue val= vb.value;
if ((val == null)|| (val == SnmpVarBind.endOfMibView)){
/* NPCTE fix for bugid 4381195 esc 0. <J.C.> < 17-Oct-2000> */
if ((elmt != null) &&
(elmt.value != SnmpVarBind.endOfMibView))
result[index]= elmt;
// else if ((val == null) && (version == snmpVersionTwo))
// vb.value = SnmpVarBind.endOfMibView;
continue;
/* end of NPCTE fix for bugid 4381195 */
}
/* NPCTE fix for bugid 4381195 esc 0. <J.C.> < 17-Oct-2000> */
if (elmt == null) continue;
/* end of NPCTE fix for bugid 4381195 */
if (elmt.value == SnmpVarBind.endOfMibView) continue;
// Now we need to take the smallest oid ...
//
int comp = elmt.oid.compareTo(vb.oid);
if (comp < 0) {
// Take the smallest (lexicographically)
//
result[index]= elmt;
}
else {
if(comp == 0) {
// Must compare agent used for reply
// Take the deeper within the reply
if(isDebugOn()) {
trace("updateResult"," oid overlapping. Oid : " +
elmt.oid + "value :" + elmt.value);
trace("updateResult","Already present varBind : " +
vb);
}
SnmpOid oid = vb.oid;
SnmpMibAgent deeperAgent = server.getAgentMib(oid);
if(isDebugOn())
trace("updateResult","Deeper agent : " + deeperAgent);
if(deeperAgent == agent) {
if(isDebugOn())
trace("updateResult","The current agent is the deeper one. Update the value with the current one");
result[index].value = elmt.value;
}
/*
Vector v = new Vector();
SnmpMibRequest getReq = createMibRequest(v,
version,
null);
SnmpVarBind realValue = new SnmpVarBind(oid);
getReq.addVarBind(realValue);
try {
deeperAgent.get(getReq);
} catch(SnmpStatusException e) {
e.printStackTrace();
}
if(isDebugOn())
trace("updateResult", "Biggest priority value is : " +
realValue.value);
result[index].value = realValue.value;
*/
}
}
}
}
protected String makeDebugTag() {
return "SnmpSubNextRequestHandler";
}
}
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