Java 带有社区字符串索引的snmp4j snmpwalk
如何使用snmp4j和社区字符串索引进行snmpwalk 我可以通过如下更改社区字符串来创建社区字符串索引public@123 (123是vlanId) 但这只适用于snmpget!!??:Java 带有社区字符串索引的snmp4j snmpwalk,java,snmp4j,Java,Snmp4j,如何使用snmp4j和社区字符串索引进行snmpwalk 我可以通过如下更改社区字符串来创建社区字符串索引public@123 (123是vlanId) 但这只适用于snmpget!!??: public ResponseEvent get(OID oids) throws IOException { PDU pdu = new PDU(); pdu.add(new VariableBinding(oid)); pdu.setType(PDU.GETNEXT);
public ResponseEvent get(OID oids) throws IOException {
PDU pdu = new PDU();
pdu.add(new VariableBinding(oid));
pdu.setType(PDU.GETNEXT);
ResponseEvent event = snmp.send(pdu, getTarget(), null);
}
private Target getTarget() {
Address targetAddress = GenericAddress.parse(sw.getAddress());
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString(communityString));
target.setAddress(targetAddress);
target.setRetries(2);
target.setTimeout(1500);
target.setVersion(SnmpConstants.version2c);
return target;
}
但是当我试着做这样的snmpwalk时,我得到了一个暂停
public HashMap<String, String> snmpWalk(String strOid) throws IOException {
OID oid = new OID(strOid);
TreeUtils treeUtils = new TreeUtils(snmp, new DefaultPDUFactory());
HashMap<String, String> snmpResult = new HashMap<String, String>();
List<TreeEvent> events = treeUtils.getSubtree(getTarget(), oid);
// some more code ...
}
public HashMap snmpWalk(字符串strOid)抛出IOException{
OID=新OID(strOid);
TreeUtils TreeUtils=新树(snmp,new DefaultPDUFactory());
HashMap snmpResult=新HashMap();
List events=treeUtils.getSubtree(getTarget(),oid);
//更多的代码。。。
}
我通过使用GETBULK编写一个SNMP walk方法修复了这个问题
设置maxRepetitions和maxSizeResponsePDU非常重要我使用以下值:
/** maxRepetitions needs to be set for BULKGET to work<br>
* it defines the maximum lines/results returned for one request.
*/
private int maxRepetitions = 50;
/** maxSizeResponsePDU needs to be set for BULKGET to work */
private int maxSizeResponsePDU = 65535;
public HashMap<String, String> snmpWalk (String startOid) throws IOException{
//String startOid = "1.3.6.1.4.1.9.9.46.1.3.1.1.4.1";
String oid = startOid;
HashMap<String, String> varBindings = new HashMap<String, String>();
while (oid.startsWith(startOid)) {
PDU pdu = getVariableBinding(new OID(oid), PDU.GETBULK);
if (pdu == null || pdu.size() == 0) return varBindings;
for (int i=0; i<pdu.size(); i++) {
VariableBinding var = pdu.get(i);
if (var == null) return varBindings;
oid = var.getOid().toString();
if (oid.startsWith(startOid)) {
varBindings.put(oid, var.getVariable().toString());
} else {
return varBindings;
}
}
}
return varBindings;
}
/**
* Method which takes a single OID and returns the response from the agent
* as a String.
*
* @param oid
* @return
* @throws IOException
*/
public PDU getVariableBinding(OID oid, int type) throws IOException {
ResponseEvent event = get(new OID[] { oid }, type);
if (event == null || event.getResponse() == null) {
warn(oid);
return null;
}
return event.getResponse();
}
public ResponseEvent get(OID oids[], int type) throws IOException {
PDU pdu = new PDU();
for (OID oid : oids) {
pdu.add(new VariableBinding(oid));
}
pdu.setType(type);
pdu.setMaxRepetitions(maxRepetitions); // This makes GETBULK work as expected
ResponseEvent event = snmp.send(pdu, getTarget(), null);
if (event != null) {
return event;
}
throw new RuntimeException("GET timed out");
}
private Target getTarget() {
Address targetAddress = GenericAddress.parse(sw.getAddress());
CommunityTarget target = new CommunityTarget();
target.setCommunity(new OctetString(communityString));
target.setAddress(targetAddress);
target.setRetries(2);
target.setTimeout(3000);
target.setVersion(SnmpConstants.version2c);
target.setMaxSizeRequestPDU(maxSizeResponsePDU); // This makes GETBULK work as expected
return target;
}
/**需要设置最大重复次数才能开始工作
*它定义了一个请求返回的最大行数/结果数。
*/
私有整数最大重复次数=50;
/**需要设置maxSizeResponsePDU以使BULKGET正常工作*/
private int maxSizeResponsePDU=65535;
公共HashMap snmpWalk(字符串startOid)引发IOException{
//字符串startOid=“1.3.6.1.4.1.9.9.46.1.3.1.1.4.1”;
字符串oid=星形ID;
HashMap varBindings=新HashMap();
while(oid.startsWith(startOid)){
PDU PDU=getVariableBinding(新OID(OID),PDU.GETBULK);
if(pdu==null | | pdu.size()==0)返回varBindings;
对于(int i=0;i和SNMP4J,有一个已经提供了您在这里实现的“漫游”功能,并为maxrepations和nonRepeaters字段设置了合理的默认值