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|
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.Target;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.event.ResponseListener;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;
import org.snmp4j.util.DefaultPDUFactory;
import org.snmp4j.util.TreeEvent;
import org.snmp4j.util.TreeListener;
import org.snmp4j.util.TreeUtils;
public class SnmpCommand implements ResponseListener {
private static Log log = LogFactory.getLog(SnmpCommand.class);
class WalkCounts {
public int requests;
public int objects;
}
String targetAddress;
VariableBinding variableBinding;
public SnmpCommand(String address) {
this.targetAddress = address;
}
public SnmpCommand() {
// TODO Auto-generated constructor stub
}
public void send(String oid, int ReqType) {
Address targetAddress = GenericAddress.parse("udp:"
+ this.targetAddress + "/161");
TransportMapping transport = null;
try {
transport = new DefaultUdpTransportMapping();
} catch (IOException e1) {
log.error("Echec lors de l'initialisation du thread pour l'écoute des requetes UDP",e1);
}
Snmp snmp = new Snmp(transport);
try {
snmp.listen();
} catch (IOException e) {
e.printStackTrace();
}
// setting up target
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString("public"));
target.setAddress(targetAddress);
target.setRetries(2);
target.setTimeout(1500);
target.setVersion(SnmpConstants.version1);
target.setTimeout(5000);
// creating PDU
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(oid)));
pdu.setType(ReqType);
// The Send Action
try {
snmp.send(pdu, target, null, this);
} catch (IOException e) {
log.error("Echec lors du lancement de la requete SNMP",e);
}
synchronized (this) {
try {
this.wait();
} catch (InterruptedException e) {
log.warn("Tree retrieval interrupted: ",e);
}
}
}
public PDU createPDU(Target target) {
PDU request;
request = new PDU();
request.setType(PDU.GETNEXT);
return request;
}
public VariableBinding request(String oid) {
send(oid, PDU.GET);
return variableBinding;
}
public List<VariableBinding> walk( OID oid) throws IOException {
final List<VariableBinding> snapshot;
snapshot = new LinkedList<VariableBinding>();
/////
Address targetAddress = GenericAddress.parse("udp:"
+ this.targetAddress + "/161");
//Address targetAddress = new UdpAddress("127.0.0.1/161");
TransportMapping transport = null;
try {
transport = new DefaultUdpTransportMapping();
} catch (IOException e1) {
log.error("Echec lors de l'initialisation du thread pour l'écoute des requetes UDP",e1);
}
Snmp snmp = new Snmp(transport);
try {
snmp.listen();
} catch (IOException e) {
e.printStackTrace();
}
// setting up target
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString("public"));
target.setAddress(targetAddress);
target.setRetries(2);
target.setTimeout(1500);
target.setVersion(SnmpConstants.version1);
/////
PDU request = createPDU(target);
request.add(new VariableBinding(oid));
request.setNonRepeaters(0);
OID rootOID = request.get(0).getOid();
final WalkCounts counts = new WalkCounts();
final long startTime = System.currentTimeMillis();
TreeUtils treeUtils = new TreeUtils(snmp, new DefaultPDUFactory());
TreeListener treeListener = new TreeListener() {
public boolean next(TreeEvent e) {
counts.requests++;
if (e.getVariableBindings() != null) {
VariableBinding[] vbs = e.getVariableBindings();
counts.objects += vbs.length;
for (int i = 0; i < vbs.length; i++) {
if (snapshot != null) {
snapshot.add(vbs[i]);
}
System.out.println(vbs[i].toString());
}
}
return true;
}
public void finished(TreeEvent e) {
if ((e.getVariableBindings() != null)
&& (e.getVariableBindings().length > 0)) {
next(e);
}
log.debug("Total requests sent: "
+ counts.requests);
log.debug("Total objects received: "
+ counts.objects);
log.debug("Total walk time: "
+ (System.currentTimeMillis() - startTime)
+ " milliseconds");
if (e.isError()) {
System.err
.println("The following error occurred during walk:");
System.err.println(e.getErrorMessage());
}
synchronized (this) {
this.notify();
}
}
};
synchronized (treeListener) {
treeUtils.getSubtree(target, rootOID, null, treeListener);
try {
treeListener.wait();
} catch (InterruptedException ex) {
log.warn("Tree retrieval interrupted: ",ex);
Thread.currentThread().interrupt();
}
}
return snapshot;
}
public static void main(String [] argv){
SnmpCommand s = new SnmpCommand();
List<VariableBinding> snapshot;
snapshot = null;
try{
snapshot = s.walk(new OID(".1.3.6.1.2.1.1.9.1.3.7"));
for (VariableBinding vb : snapshot){
System.out.println(vb.getOid());
System.out.println(vb.getSyntax());
System.out.println(vb.getVariable());
}
}catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
public void onResponse(ResponseEvent event) {
synchronized (this) {
((Snmp) event.getSource()).cancel(event.getRequest(), this);
this.variableBinding = event.getResponse().get(0);
this.notify();
}
}
} |
API : SNMP4J
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